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
- Full Text: false
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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
Examination of effective VAr with respect to dynamic voltage stability in renewable rich power grids
- Authors: Alzahrani, Saeed , Shah, Rakibuzzaman , Mithulananthan, N.
- Date: 2021
- Type: Text , Journal article
- Relation: IEEE Access Vol. 9, no. (2021), p. 75494-75508
- Full Text:
- Reviewed:
- Description: High penetrations of inverter-based renewable resources (IBRs) diminish the resilience that traditional power systems had due to constant research and developments for many years. In particular, dynamic voltage stability becomes one of the major concerns for transmission system operators due to the limited capabilities of IBRs (i.e., voltage and frequency regulation). A heavily loaded renewable-rich network is susceptible to fault-induced delayed voltage recovery (FIDVR) due to insufficient effective reactive power (E-VAr) in power grids. Hence, it is crucial to thoroughly scrutinize each VAr resources' participation in E-VAr under various operating conditions. Moreover, it is essential to investigate the influence of E-VAr on system post-fault performance. The E-VAr investigation would help in determining the optimal location and sizing of grid-connected IBRs and allow more renewable energy integration. Furthermore, it would enrich decision-making about adopting additional grid support devices. In this paper, a comprehensive assessment framework is utilized to assess the E-VAr of a power system with a large-scale photovoltaic power. Plant under different realistic operating conditions. Several indices quantifying the contribution of VAr resources and load bus voltage recovery assists to explore the transient response and voltage trajectories. The recovery indices help have a better understanding of the factors affecting E-VAr. The proposed framework has been tested in the New England (IEEE 39 bus system) through simulation by DIgSILENT Power Factory. © 2013 IEEE.