Showing items 1 - 20 of 76

A 3D numerical model to estimate lightning types for PyroCb thundercloud

- Barman, Surajit, Shah, Rakibuzzaman, Islam, Syed, Kumar, Apurv

  • Authors: Barman, Surajit , Shah, Rakibuzzaman , Islam, Syed , Kumar, Apurv
  • Date: 2024
  • Type: Text , Journal article
  • Relation: Applied Sciences (Switzerland) Vol. 14, no. 12 (2024), p.
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  • Description: Pyrocumulonimbus (pyroCb) thunderclouds, produced from extreme bushfires, can initiate frequent cloud-to-ground (CG) lightning strikes containing extended continuing currents. This, in turn, can ignite new spot fires and inflict massive harm on the environment and infrastructures. This study presents a 3D numerical thundercloud model for estimating the lightning of different types and its striking zone for the conceptual tripole thundercloud structure which is theorized to produce the lightning phenomenon in pyroCb storms. More emphasis is given to the lower positive charge layer, and the impacts of strong wind shear are also explored to thoroughly examine various electrical parameters including the longitudinal electric field, electric potential, and surface charge density. The simulation outcomes on pyroCb thunderclouds with a tripole structure confirm the presence of negative longitudinal electric field initiation at the cloud’s lower region. This initiation is accompanied by enhancing the lower positive charge region, resulting in an overall positive electric potential increase. Consequently, negative surface charge density appears underneath the pyroCb thundercloud which has the potential to induce positive (+CG) lightning flashes. With wind shear extension of upper charge layers in pyroCb, the lightning initiation potential becomes negative to reduce the absolute field value and would generate negative (

A data-driven trajectory approach for dynamic VAr support in renewable rich power grid

- Alshareef, Abdulrhman, Shah, Rakibuzzaman, Mithulananthan, Nadarajah, Akram, Umer, Alzahrani, Saeed

  • Authors: Alshareef, Abdulrhman , Shah, Rakibuzzaman , Mithulananthan, Nadarajah , Akram, Umer , Alzahrani, Saeed
  • Date: 2024
  • Type: Text , Journal article
  • Relation: IEEE Access Vol. 12, no. (2024), p. 77816-77830
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  • Description: Short-term voltage stability (STVS) of power grids could be jeopardized due to the nonlinear dynamic characteristics of loads such as induction motors (IMs) and the retirement of synchronous generators. Moreover, the appearance of inverter-based generators (IBGs) in the system would make the grids more susceptible to voltage instability. Hence, there is an indispensable need to identify adequate mitigation measures to deal with these enduring challenges. This paper proposes a driven-data trajectory approach to locate the dynamic VAr support (DVS) to maintain STVS in power grids with high penetration of IBGs. The proposed data-driven trajectory approach ranks the best locations for DVS by comparing grid responses of different possible DVS sites with respect to the desired reference response. The developed approach covers the full signature of grid dynamics in generation and load sides. For illustration, this approach is applied to the Reliability and Voltage Stability (RVS) test system designed for STVS analysis. Several scenarios are tested, including various IM penetrations and IBG integration, control and load compositions, to demonstrate the viability and robustness of the proposed approach. Moreover, the STVS performance of the system with the proposed algorithm is verified through the motor stalling scan. The comprehensive assessment shows that the system exhibits the best STVS performance with DVS placement using the proposed method. © 2013 IEEE.

A heuristic technique for EV hosting capacity enhancement in power distribution network

- Rahman, Quazi, Chowdhury, Abdul, Shah, Rakibuzzaman

  • Authors: Rahman, Quazi , Chowdhury, Abdul , Shah, Rakibuzzaman
  • Date: 2023
  • Type: Text , Conference paper
  • Relation: 33rd Australasian Universities Power Engineering Conference, AUPEC 2023; Ballarat; 25-27 September 2023,
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  • Description: Recently, electric vehicles (EV) have gained significant attention in Bangladesh. The policy makers are realizing the necessity for a paradigm shift and switching transportation system to a clean energy option. However, it is to be noted that disproportionate deployment of large-scale EVs on the distribution networks may results issues like low voltage, overloading of distribution feeder etc. The key to mitigate these violations is appropriate hosting capacity assessment. This paper presents a method to enhance the EV hosting capacity (HC) based on an optimal capacitor placement (OCP) procedure. Appropriate placement of shunt capacitors in power distribution network significantly improves voltage, reduces line losses, improves power factor and enhance hosting capacity. Variable loading condition is considered and both fixed and switched type capacitor banks are used so that no under- or over-compensation occurs under any loading condition. A cost function is used to ensure the optimum investment. Voltage and thermal overloading are considered as the governing criteria for assessing the EV hosting capacity. Application of this technique on the IEEE 15-bus radial network shows excellent performance. The methodology is also applied in a real network of Dhaka Power Distribution Company (DPDC), a government owned power distribution utility in Bangladesh and significant hosting capacity improvement has been observed. © 2023 IEEE.

A hybrid PWM strategy for SMES integrated grid-feeding transformerless PV Inverters

- Mondal, Sudipto, Biswas, Shuvra, Bin Islam, Md Sabbir, Islam, Md Rabiul, Shah, Rakibuzzaman

A hydrogen supply-chain model powering Australian isolated communities

- Hasan, Tanvir, Hassan, Nur, Shah, Rakibuzzaman, Emami, Kianoush, Anderson, Jake

  • Authors: Hasan, Tanvir , Hassan, Nur , Shah, Rakibuzzaman , Emami, Kianoush , Anderson, Jake
  • Date: 2023
  • Type: Text , Journal article
  • Relation: Energy Reports Vol. 9, no. (2023), p. 209-214
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  • Description: This article proposes a supply chain-based green hydrogen microgrid modelling for a number of remote Australian communities. Green hydrogen can be used as an emissions-free fuel source for electricity generation in places where large-scale renewable energy production is impossible due to land availability, population, or government regulations. This research focuses on the Torres Strait Island communities in northern Australia, where the transition from diesel to renewable electricity generation is difficult due to very limited land availability on most islands. Due to geographical constraints, low population and smaller electrical load, the green hydrogen needs to be sourced from somewhere else. This research presents a green hydrogen supply chain model that leverages the land availability of one island to produce hydrogen to supply other island communities. In addition, this research presents a model of producing and transporting green hydrogen while supplying cheaper electricity to the communities at focus. The study has used a transitional scenario planning approach and the HOMER simulation platform to find the least-cost solution. Based on the results, a levelised cost of energy range of AU$0.42 and AU$0.44 was found. With the help of a green hydrogen supply chain, CO2 emissions at the selected sites could be cut by 90 %. This study can be used as a guide for small clustered communities that could not support or justify large-scale renewable generation facilities but need more opportunities to install renewable generation. © 2023

A new data driven long-term solar yield analysis model of photovoltaic power plants

- Ray, Biplob, Shah, Rakibuzzaman, Islam, Md Rabiul, Islam, Syed

  • Authors: Ray, Biplob , Shah, Rakibuzzaman , Islam, Md Rabiul , Islam, Syed
  • Date: 2020
  • Type: Text , Journal article
  • Relation: IEEE Access Vol. 8, no. (2020), p. 136223-136233
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  • Description: Historical data offers a wealth of knowledge to the users. However, often restrictively mammoth that the information cannot be fully extracted, synthesized, and analyzed efficiently for an application such as the forecasting of variable generator outputs. Moreover, the accuracy of the prediction method is vital. Therefore, a trade-off between accuracy and efficacy is required for the data-driven energy forecasting method. It has been identified that the hybrid approach may outperform the individual technique in minimizing the error while challenging to synthesize. A hybrid deep learning-based method is proposed for the output prediction of the solar photovoltaic systems (i.e. proposed PV system) in Australia to obtain the trade-off between accuracy and efficacy. The historical dataset from 1990-2013 in Australian locations (e.g. North Queensland) are used to train the model. The model is developed using the combination of multivariate long and short-term memory (LSTM) and convolutional neural network (CNN). The proposed hybrid deep learning (LSTM-CNN) is compared with the existing neural network ensemble (NNE), random forest, statistical analysis, and artificial neural network (ANN) based techniques to assess the performance. The proposed model could be useful for generation planning and reserve estimation in power systems with high penetration of solar photovoltaics (PVs) or other renewable energy sources (RESs). © 2013 IEEE.

A new global index for short term voltage stability assessment

- Alshareef, Abdulrhman, Shah, Rakibuzzaman, Mithulananthan, Nadarajah, Alzahrani, Saeed

  • Authors: Alshareef, Abdulrhman , Shah, Rakibuzzaman , Mithulananthan, Nadarajah , Alzahrani, Saeed
  • Date: 2021
  • Type: Text , Journal article
  • Relation: IEEE Access Vol. 9, no. (2021), p. 36114-36124
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  • Description: The utility scale of non-conventional generators (NCGs), such as wind and photovoltaic (PV) plants, are competitive alternatives to synchronous machines (SMs) for power generation. Higher penetration of NCGs has been respondent of causing several recent incidents leading up to voltage collapse in power systems due to the distinct characteristics of NCGs under different operating conditions. Consequently, the so-called system strength has been reduced with higher NCGs penetration. A number of indices have been developed to quantify system strength from the short-term voltage stability (STVS) perspective. None of the indices capture the overall performances of power systems on dynamic voltage recovery. In this paper, an improvement in one of the STVS indices namely, the Voltage Recovery Index (VRI), is proposed to overcome shortcomings in the original index. Moreover, the improved index is globalized to establish a new index defined as system voltage recovery index (VRIsys) to quantify STVS at the system level. The amended VRI and developed VRIsys are used in systematic simulations to quantify the impact and interaction of various factors that could affect system strength. The assessment was conducted using time-domain simulation with direct connected induction motors (DCIMs) and a proliferation of converter-based technologies on both the generation and load sides, namely, NCGs and Variable Speed Drives (VSDs), respectively. © 2013 IEEE.

A new modulation technique for H6 transformerless inverter to minimize leakage current with reduced power loss

- Mondal, Sudipto, Biswas, Shuvra, Islam, Md Rabiul, Shah, Rakibuzzaman

  • Authors: Mondal, Sudipto , Biswas, Shuvra , Islam, Md Rabiul , Shah, Rakibuzzaman
  • Date: 2022
  • Type: Text , Conference paper
  • Relation: 1st IEEE Industrial Electronics Society Annual On-Line Conference, ONCON 2022, Kharagpur, India, 9-11 December 2022, 1st IEEE Industrial Electronics Society Annual On-Line Conference, ONCON 2022
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  • Description: Solar energy has a significant role to play in supplying the world's growing energy needs, while transformerless inverters (TLIs) are effectively used in photovoltaic (PV) applications due to their high efficiency, small size, and lower cost. Though transformer-based inverter is frequently employed to offer galvanic isolation and voltage ratio conversions between input and output, they're getting less popular due to high iron and copper loss. Among various types of single-phase transformerless inverters, most of their switching techniques are based on the unipolar pulse width modulation (UPPWM) or bipolar pulse width modulation (BPPWM) method. Due to some unbalanced gate pulses in both UPPWM and BPPWM techniques, total harmonic distortion (THD) of output voltage (without filter) increases significantly. The leakage current also increases due to high harmonics content in the output power of TLI systems. The asymmetrical switching of the power semiconductor switches leads to a substantial increase in power loss due to unbalanced gate pulses. In this paper, a new modulation technique is proposed to reduce the output voltage THD, leakage current, as well as the total power losses compared to mostly used UPPWM and BPPWM techniques employing in PV fed TLI system. The mostly used H6 transformerless inverter topology is chosen here for performance evaluation. The simulation is carried out in MATLAB/Simulink and PLECS simulation environments to validate the proposed claim. By using the H6 transformerless inverter topology, 12.2 mA of common mode current is achieved by maintaining a steady common mode voltage via the proposed modulation technique. The output voltage (without filter) THD is found to be 37.5% with the proposed modulation technique, while BPPWM and UPPWM show 98.7% and 53.8% THD, respectively. A reduced-scaled laboratory prototype is built and tested to verify the simulated claim. © 2022 IEEE.

A new transformer-less common grounded nine-level grid-connected boost inverter

- Kurdkandi, Naser, Marangalu, Milad, Haghighian, Saiedeh, Islam, Md Rabiul, Mehrizi-Sani, Ali, Shah, Rakibuzzaman

  • Authors: Kurdkandi, Naser , Marangalu, Milad , Haghighian, Saiedeh , Islam, Md Rabiul , Mehrizi-Sani, Ali , Shah, Rakibuzzaman
  • Date: 2022
  • Type: Text , Conference paper
  • Relation: 1st IEEE Industrial Electronics Society Annual On-Line Conference, ONCON 2022, Kharagpur, India, 9-11 December 2022, 1st IEEE Industrial Electronics Society Annual On-Line Conference, ONCON 2022
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  • Description: In this paper, a new single-source switched-capacitor-based 9-level structure that is applied to grid systems is presented. In this presented circuit, the null of the grid and input source has the common ground point. As a result, the leakage current is suppressed completely. The introduced solution can provide a nine-level output voltage waveform and boost the input voltage amplitude using a single input source. The high step-up factor of the introduced inverter is 2. In this topology, the switched capacitors are fixed to input the dc power supply and provide the voltage boosting feature. The mathematical analysis of the output filter is expressed. A peack current control method is applied to generate the gate pulses and control both active and reactive powers. A thorough comparison has been made to highlight the proposed structure's features and show the difference between the proposed structure and other structures. Finally, to confirm the correct operation of the proposed structure, its electrical circuit was simulated using MATLAB/Simulink software, and the results were extracted considering different operational conditions. © 2022 IEEE.

A proximal subgradient algorithm with extrapolation for structured nonconvex nonsmooth problems

- Pham, Tan, Dao, Minh, Shah, Rakibuzzaman, Sultanova, Nargiz, Li, Guoyin, Islam, Syed

  • Authors: Pham, Tan , Dao, Minh , Shah, Rakibuzzaman , Sultanova, Nargiz , Li, Guoyin , Islam, Syed
  • Date: 2023
  • Type: Text , Journal article
  • Relation: Numerical Algorithms Vol. 94, no. 4 (2023), p. 1763-1795
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  • Description: In this paper, we consider a class of structured nonconvex nonsmooth optimization problems, in which the objective function is formed by the sum of a possibly nonsmooth nonconvex function and a differentiable function with Lipschitz continuous gradient, subtracted by a weakly convex function. This general framework allows us to tackle problems involving nonconvex loss functions and problems with specific nonconvex constraints, and it has many applications such as signal recovery, compressed sensing, and optimal power flow distribution. We develop a proximal subgradient algorithm with extrapolation for solving these problems with guaranteed subsequential convergence to a stationary point. The convergence of the whole sequence generated by our algorithm is also established under the widely used Kurdyka–Łojasiewicz property. To illustrate the promising numerical performance of the proposed algorithm, we conduct numerical experiments on two important nonconvex models. These include a compressed sensing problem with a nonconvex regularization and an optimal power flow problem with distributed energy resources. © 2023, The Author(s).

A study on green hydrogen-based isolated microgrid

- Hasan, Tanvir, Emami, Kianoush, Shah, Rakibuzzaman, Hassan, Nur, Anderson, Jake, Thomas, Dane, Louis, Alan

  • Authors: Hasan, Tanvir , Emami, Kianoush , Shah, Rakibuzzaman , Hassan, Nur , Anderson, Jake , Thomas, Dane , Louis, Alan
  • Date: 2022
  • Type: Text , Journal article
  • Relation: Energy Reports Vol. 8, no. (2022), p. 259-267
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  • Description: This paper assesses the techno-economic feasibility of a green hydrogen-based microgrid for a remote Australian island. Hydrogen can be used to provide clean energy in areas where large-scale renewable energy sources are not feasible owing to geography, government regulations, or regulatory difficulties. This study not only identifies the appropriate component size for a hydrogen-based microgrid but also provides an economic perspective of decarbonising Thursday Island in Torres Straits, Queensland, Australia. Due to geographical constraints, the green hydrogen production system needs to be distinct from the electrical network. This research shows how to produce green hydrogen, transport it, and generate power at a low cost. The study was performed utilising the HOMER simulation platform to find the least cost solution. The simulation results demonstrate an AU$0.01 reduction in Levelised Cost of Energy compared to the present electricity generation cost which is AU$0.56. The inclusion of a green hydrogen system will potentially minimise CO2 emissions by 99.6% while ensuring almost 100% renewable penetration. The results of this study will also serve as a guide for the placement of hydrogen-based microgrids in similar remote locations around the world where numerous remote energy systems are located close to each other. © 2022 The Authors

A survey of commercial and industrial demand response flexibility with energy storage systems and renewable energy

- Yasmin, Roksana, Amin, B.M. Ruhul, Shah, Rakibuzzaman, Barton, Andrew

  • Authors: Yasmin, Roksana , Amin, B.M. Ruhul , Shah, Rakibuzzaman , Barton, Andrew
  • Date: 2024
  • Type: Text , Journal article , Review
  • Relation: Sustainability (Switzerland) Vol. 16, no. 2 (2024), p.
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  • Description: The transition from traditional fuel-dependent energy systems to renewable energy-based systems has been extensively embraced worldwide. Demand-side flexibility is essential to support the power grid with carbon-free generation (e.g., solar, wind.) in an intermittent nature. As extensive energy consumers, commercial and industrial (C&I) consumers can play a key role by extending their flexibility and participating in demand response. Onsite renewable generation by consumers can reduce the consumption from the grid, while energy storage systems (ESSs) can support variable generation and shift demand by storing energy for later use. Both technologies can increase the flexibility and benefit by integrating with the demand response. However, a lack of knowledge about the applicability of increasing flexibility hinders the active participation of C&I consumers in demand response programs. This survey paper provides an overview of demand response and energy storage systems in this context following a methodology of a step-by-step literature review covering the period from 2013 to 2023. The literature review focuses on the application of energy storage systems and onsite renewable generation integrated with demand response for C&I consumers and is presented with an extensive analysis. This survey also examines the demand response participation and potential of wastewater treatment plants. The extended research on the wastewater treatment plant identifies the potential opportunities of coupling biogas with PV, extracting the thermal energy and onsite hydrogen production. Finally, the survey analysis is summarised, followed by critical recommendations for future research. © 2024 by the authors.

A switched-capacitor mli with modified single-carrier PWM for transformerless PV interfacing

- Mondal, Sudipto, Biswas, Shuvra, Islam, Md Rabiul, Shah, Rakibuzzaman, Muttaqi, Kashem

  • Authors: Mondal, Sudipto , Biswas, Shuvra , Islam, Md Rabiul , Shah, Rakibuzzaman , Muttaqi, Kashem
  • Date: 2024
  • Type: Text , Conference paper
  • Relation: 5th IEEE Kansas Power and Energy Conference, KPEC 2024, Manhattan, 25-26 April 2024, 2024 IEEE Kansas Power and Energy Conference, KPEC 2024
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  • Description: Among different types of existing transformerless multilevel inverters (MLIs) employed for grid-tied PV applications, switched-capacitor (SC) MLIs are getting much popularity for having single source requirement, intrinsic self-voltage balancing of capacitors, and reduced electromagnetic interference (EMI). However, main operational issues of such converters are having several SC units for five level voltage output, large amount of semiconductor devices, high total harmonic distortion (THD). A reduced power semiconductor device count multilevel transformerless inverter (MLTI) is presented in this paper, which is structured on single SC, six switches, and one diode for five level voltage output. The proposed MLTI features self-voltage balancing of SCs, auto-boost capability, and reactive power transmission ability. Apart from this, a new single-carrier based pulse width modulation (PWM) scheme is also proposed in this paper which is known as single-carrier 3rd harmonic saturated PWM (SCTHSPWM). The proposed MLTI along with SCTHSPWM scheme offers low output voltage total harmonic distortion (THD), power loss, and improved thermal stability compared to several recently proposed MLTIs for PV applications. MATLAB/Simulink and PLECS simulations, along with a 1kW laboratory test, are conducted to validate the feasibility of the proposed MLTI. © 2024 IEEE.

A unified damping controller for non-stationary forced oscillation

- Surinkaew, Tossaporn, Emami, Kianoush, Shah, Rakibuzzaman, Mithulananthan, Nadarajah, Muyeen, S., Fernando, Tyrone

  • Authors: Surinkaew, Tossaporn , Emami, Kianoush , Shah, Rakibuzzaman , Mithulananthan, Nadarajah , Muyeen, S. , Fernando, Tyrone
  • Date: 2022
  • Type: Text , Journal article
  • Relation: International Journal of Electrical Power and Energy Systems Vol. 143, no. (2022), p.
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  • Description: Forced disturbances (FDs) with non-stationary frequencies can sequentially resonate from electromechanical modes (EMs) to sub/super synchronous modes (SSMs) and thus lead to non-stationary forced oscillations (FOs). Previous FO damping controllers designed for specified frequency bands may not be able to suppress the non-stationary FOs. This paper proposes a unified FO damping controller design method to deal with all oscillations caused by non-stationary FOs. The model of a power system with non-stationary FOs is obtained by a continuous model detection and identification of measured signals, which does not require any value of the system parameters. Accordingly, four stability indices, i.e., robustness, interaction, frequency, and damping ratio of the EMs and SSMs, can be calculated from the estimated model. At each operating point, these indices are monitored and used to optimally design the unified FO damping controller. The effectiveness of the proposed unified FO damping controller is verified in the modified Southeast Australian power system with converter controlled-based generations under various operating points and FO conditions. © 2022 Elsevier Ltd

Active and reactive power injection of energy storage for short-term frequency stability in islanded power systems

- Akram, Umer, Shah, Rakibuzzaman, Amjady, Nima, Mithulananthan, Nadarajah, Islam, Syed

  • Authors: Akram, Umer , Shah, Rakibuzzaman , Amjady, Nima , Mithulananthan, Nadarajah , Islam, Syed
  • Date: 2024
  • Type: Text , Journal article
  • Relation: Journal of Energy Storage Vol. 90, no. (2024), p.
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  • Description: Fast frequency response (FFR) is crucial to enhance and maintain the frequency stability in power systems with high penetration of converter-interfaced renewable energy sources (RES). Active power based FFR reserves, such as energy storage systems (ESSs), are being considered for this purpose. However, the cost associated with ESS-based FFR reserves can be significantly high due to the high-power capacity associated with the FFR reserves. Therefore, this paper proposes a novel FFR reserve to achieve a techno-economically feasible solution, i.e., to achieve a better or similar service with a smaller size of ESS. Unlike the conventional FFR reserve that just uses active power, the proposed active and reactive power-based FFR reserve (i.e., P-Q-FFR reserve) modulates the grid's active and reactive powers. The challenges associated with the P-Q-FFR reserve design are the estimation of optimal values of MVAr, MW, and MWh to be injected into the system while ensuring the frequency and voltage stabilities at the lowest possible cost. First, a data-driven technique based on frequency dynamic signature (FDS) is developed in this work to identify the suitable location of the P-Q-FFR reserve. Afterward, a two-layered region reduction iterative algorithm (TL-RRIA) is developed to determine the storage size (MW, MWh, and MVAr) for the P-Q-FFR reserve. The proposed solution is tested using the DIgSILENT PowerFactory. Simulation results show the effectiveness of the proposed TL-RRIA and data-driven FDS technique. A techno-economic comparison between the conventional FFR reserve and proposed P-Q-FFR reserve is also presented to show the superiority of the proposed one. © 2024 The Authors

Advanced voltage balancing discontinuous PWM technique for solar PV fed grid-tied NPC inverters

- Hossain, Shahriar, Biswas, Shuvra, Mondal, Sudipto, Nath, Joysree, Islam, Md Rabiul, Shah, Rakibuzzaman

  • Authors: Hossain, Shahriar , Biswas, Shuvra , Mondal, Sudipto , Nath, Joysree , Islam, Md Rabiul , Shah, Rakibuzzaman
  • Date: 2024
  • Type: Text , Journal article
  • Relation: IEEE Transactions on Applied Superconductivity Vol. 34, no. 8 (2024), p.
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  • Description: Multilevel inverters (MLIs) have significantly improved the overall performance, dependability and efficiency of the renewable energy system. Moreover, these can be easily integrated with the superconducting magnetic energy storage (SMES) systems. Maintaining the power qualities of these MLIs is always marked as a major research concern which can be heavily impacted by the pulse width modulation (PWM) strategies. An improved voltage balancing discontinuous PWM (DPWM) scheme is suggested in this work for the single-phase grid-tied 5-level neutral point clamped (NPC) inverter, which can significantly mitigate the fluctuation of the dc-link capacitor voltages as well as the switching losses of the power IGBTs. The reduction in switching losses will give lower thermal stress to the power devices. The proposed DPWM scheme is compared with other existing DPWM schemes for proving its effectiveness. The simulation of the entire system is performed by using MATLAB Simulink and PLECS simulation platform. A lower scale prototype is also constructed in the laboratory. © 2002-2011 IEEE.

An improved energy and cost minimization scheme for Home Energy Management (HEM) in the smart grid framework

- Ur Rashid, Md Mamun, Hossain, Md Alamgir, Shah, Rakibuzzaman, Alam, Md Shaiul, Karmaker, Ashish, Rahman, Muaz

  • Authors: Ur Rashid, Md Mamun , Hossain, Md Alamgir , Shah, Rakibuzzaman , Alam, Md Shaiul , Karmaker, Ashish , Rahman, Muaz
  • Date: 2020
  • Type: Text , Conference paper
  • Relation: 2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020; Virtual, Tianjin; 16 to 18 October 2020
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  • Description: In the current energy perspective, home energy management (HEM) is an essential requirement for residential consumers due to excessive energy utilization by the household appliances. This paper proposes an improved energy and cost minimization scheme for residential consumers to shape peak load and utility tariffs. An efficient power management algorithm (PMA) has been developed with renewable energy sources (RESs) and energy storage systems (ESS). The PMA is executed using C++ software. The benefits of the RESs and ESS with the proposed PMA techniques are analyzed using three different scenarios. Extensive case studies are carried out to validate the effectiveness of the proposed energy and cost minimization scheme. It is demonstrated that the proposed method may save energy and costs up to 34% and 45% compared to the existing methods. © 2020 IEEE.

An overview of demand response opportunities for commercial and industrial customers in the Australian NEM

- Amin, B.M. Ruhul, Shah, Rakibuzzaman, Hasan, Kazi, Tayab, Usman, Islam, Syed

  • Authors: Amin, B.M. Ruhul , Shah, Rakibuzzaman , Hasan, Kazi , Tayab, Usman , Islam, Syed
  • Date: 2022
  • Type: Text , Conference paper
  • Relation: 14th IEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2022, Melbourne, 20-23 November 2023, 2022 IEEE PES 14th Asia-Pacific Power and Energy Engineering Conference (APPEEC) Vol. 2022-November
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  • Description: Different demand response (DR) mechanisms available in the Australian national electricity market (NEM), such as wholesale, ancillary, emergency, and network DR could provide significant flexibility to maintain and enhance power system security and reliability. Australian Energy Market Operator (AEMO) is continually reviewing global practices working with different states and territories, and revising the legislative and technical requirements for integrating more DR participants into the national electricity market (NEM). Commercial and Industrial (CandI) customers have a higher potential to participate in DR with flexible larger loads and onsite distributed energy resources (DERs). The CandI customers can reduce their energy bills and earn incentives from operators through DR participation. This paper provides a comprehensive review of different types of DR mechanisms that have been used in the Australian NEM. Technical and legislative requirements to participate in DR for CandI customers have been identified and summarised. Furthermore, the challenges for DR participation and potential benefits have been highlighted. Finally, a look-up table is prepared to identify the suitability of CandI customers to participate in one or multiple DR mechanisms potentially. The findings of this paper can be used as a guiding tool for CandI customers to understand technical and legislative requirements for participating in different DR mechanisms in Australia and select the most appropriate DR mechanisms for maximising their benefits. © 2022 IEEE.

Analyzing the impacts on stability of ibr-dominated power systems under evolving composite loads

- Ismail, Muhammad, Amin, B. M. Ruhul, Choudhury, Taneer, Shah, Rakibuzzaman

  • Authors: Ismail, Muhammad , Amin, B. M. Ruhul , Choudhury, Taneer , Shah, Rakibuzzaman
  • Date: 2025
  • Type: Text , Conference paper
  • Relation: 5th International Conference on Electrical and Electronics Engineering, ICEEE 2024, Melbourne, 11-12 September 2024, Innovations in Electrical and Electronics Engineering, Proceedings of ICEEE 2024, Volume 1 Vol. 1294, p. 287-302
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  • Description: Addressing climate change through the integration of renewable energy resources necessitates the development of advanced control strategies and precise load modeling to ensure the secure and stable operation of electric grids. This paper investigates the voltage and frequency stability of a transmission network with a high penetration of inverter-based resources (IBRs) under evolving composite load models. At first, the stability of the network is analyzed for different penetration levels of renewable generation. Later, a mix of Grid-following and Grid-forming inverter controls is employed to enhance the system stability. Finally, composite load models are integrated into the network to investigate the impacts on the stability of the system. All simulations are conducted using DIgSILENT PowerFactory software under different load scenarios, employing eigenvalue analysis and RMS simulations as stability indices on a 9-bus transmission network. The results demonstrate that increased dynamic loads lead to significant voltage dips and oscillations in the network and advanced control strategies and precise load modeling are essential for maintaining stability in the IBR-dominated grids. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

Assessing the impacts of cross-border interconnection to renewable energy penetration in power systems: case study of ASEAN subregion

- Anugrah, Pinto, Shah, Rakibuzzaman, Mithulananthan, Nadarajah