Dynamic signature-based alignment factor for Var allocation
- Authors: Alshareef, Abdulrhman , Shah, Rakibuzzaman , Mithulananthan, Nadarajah , Akram, Umer , Krimanto, Uji
- Date: 2022
- Type: Text , Conference paper
- Relation: 14th IEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2022, Melbourne, Australia, 20-23 November 2022, Asia-Pacific Power and Energy Engineering Conference, APPEEC Vol. 2022-November
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- Description: A driven-data trajectory approach has been developed to allocate dynamic VAr source (DVS) to improve the short-term voltage stability (STVS) of power grids. The siting approach for DVS would be carried out by the comparing grid responses of different sites with DVS by considering the desired reference response. The undergoing assessment emphatically covers the full signature of grid dynamics interaction involving generation, transmission, and load characteristics. For illustration, the developed approach is applied to the Reliability and Voltage Stability (RVS) test system designed for STVS analysis. Several scenarios are tested, such as different levels of induction motor load, large-scale PV (LSPV), and LSPV reactive current injection, to demonstrate the viability and robustness of the approach. Subsequently, the viability and robustness of the siting approach are verified by checking STVS performance using the VRIsys index. © 2022 IEEE.
Dynamic VAr planning of large-scale PV enriched grid
- Authors: Alzahrani, Saeed , Mithulananthan, Nadarajah , Alshareef, Abdulrhman , Shah, Rakibuzzaman
- Date: 2021
- Type: Text , Conference paper
- Relation: 2021 IEEE PES Innovative Smart Grid Technologies - Asia, ISGT Asia 2021, Brisbane, 5-8 December 2021
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- Description: The integration of more inverter-based renewable resources (IBRs) would make the grid susceptible to large disturbances. Short term voltage instability is one of the key concerns for the renewable rich power system. An additional dynamic VAr support would be desirable to enhance system recovery. STATCOM is technically and financially promising solution which can provide dynamic Var support to the renewable rich power system. In this paper, system transient performance is assessed after synchronous generators (SGs) being significantly replaced by IBRs. To avoid the delayed recovery, STATCOM was integrated at the point of common coupling (PCC). Considering the changes in the grid's effective VAr, a framework was proposed to size the STATCOM. Moreover, the influence of distributed STATCOM on system performance was also examined. The proposed framework has been tested in the New England 39 bus system through simulation by DIgSILENT Power Factory. © 2021 IEEE
Impact of Active Current Ramping of Large-Scale PV Plant on the Dynamic Voltage Stability
- Authors: Alshareef, Abdulrhman , Shah, Rakibuzzaman , Mithulananthan, Nadarajah
- Date: 2021
- Type: Text , Conference paper
- Relation: 2021 IEEE PES Innovative Smart Grid Technologies - Asia, ISGT Asia 2021, Brisbane, 5-8 December 2021
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- Description: This paper investigates the impact of active current ramping rate (rrpwr) of Large-Scale photovoltaic (LSPV) plants on the short-term dynamic voltage stability. Thus, the rrpwr is adapted according to the fault distance from the LSPV plant Point of Integration (POI). The investigation shows that when a fault occurs closer to POI, lower rrpwr helps to achieve better voltage recovery. Lower rrpwr means slower active power recovery following active power curtailment activated by a grid fault. Therefore, lower rrpwr will not compromise the reactive power injection as needed. Based on the minimal improvement in the voltage recovery at POI, it can be concluded that the adaptive rrpwr is not an influential factor to improve the short-term dynamic voltage stability. © 2021 IEEE
Influence of induction motor in stability of power system with high penetration of large-scale PV
- Authors: Alshareef, Abdulrhman , Nadarajah, Mithulananthan , Shah, Rakibuzzaman
- Date: 2020
- Type: Text , Conference proceedings
- Relation: 2nd International Conference on Smart Power and Internet Energy Systems, SPIES 2020; Bangkok, Thailand; 15th-18th September 2020 p. 269-274
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- Description: Inverter-Based Energy Resources (IBERs) have become an ordinary portion of the generation mix in power systems. Furthermore, converter-based technology has come to dominate modern motor loads on the consumption side. This transition in components towards accommodating power electronic devices alters the dynamic response of the power system. This paper investigates the impact of these elements on the dynamic stability of the power system. Firstly, this study successes to optimize a suitable model for converter-based motor loads. Secondly, indices of transient and voltage stabilities are used to quantify the strength of the power system at different circumstances incorporating the induction motor loads. Finally, this analysis provides an insight into the mutual interactions between transient and voltage stabilities. It is concluded that converter-based motor loads improve the voltage recovery when compared with direct-connected induction motors. However, the system is vulnerable to transient stability with the proliferation of inverter-based motor loads when IBERs dominant in the generation mix. © 2020 IEEE.