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[IEEE 2019 8th International Conference on Power Systems (ICPS) - Jaipur, India (2019.12.20-2019.12.22)] 2019 8th International Conference on Power Systems (ICPS) - Primary Frequency Response Constrained Energy Storage Scheduling Under Photovoltaic Generation
摘要： Variable demand pattern with the large-scale photovoltaic (PV) integration poses a challenge for the system operator to maintain demand-generation balance. This imbalance would lead to events of frequency deviations. The initial frequency deviation can be counteracted by system inertia (SI) and primary frequency response (PFR). However, due to decline in frequency response on PV integration causes more events of frequency deviations, following contingencies like generation loss. This decline in system response necessitates additional sources of PFR. Energy storage system (ESS) due to its high power capacity and fast response time could be a viable alternative for PFR. In this context, the paper proposes to scrutinise the potential of ESS in controlling frequency under large-scale PV integration. New England 39 bus system is used to demonstrate the efficacy of the proposed. Simulation results show the ESS potential for PFR adequacy under PV integration. Moreover, the results demonstrate the reduction in system operation cost and PV curtailment.
关键词： rate of change of frequency,system inertia,primary frequency response,Energy storage systems,PV curtailment
更新于2025-09-23 15:21:01
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Frequency support from photovoltaic power plants using offline maximum power point tracking and variable droop control
摘要： With higher penetration of converter-connected renewable energy sources (RES) into power systems, the successful operation of the system is challenged by significant reductions in system inertia. Presently, given the dominant share of the conventional synchronous power plant, RES power plants are not demanded to provide ancillary services. However, as RES connections increase, RES power plants will play a major role in power system operation, contributing to frequency control. This study demonstrates that photovoltaic power plants (PVPPs) can provide effectively different types of frequency support based on a power reserve and an offline maximum power point tracking (MPPT) technique. An innovative method to de-load the PVPP without significantly increasing the MPPT complexity is proposed. Results from different PVPP frequency support methods, under varying levels of photovoltaic penetration, are presented which demonstrate their capability to provide inertia support comparable to that of synchronous generators. A new variable droop control method, which releases maximum power during the inertial response and returns to fixed droop gain value after a specified time is also presented. The results from using the variable droop show that the frequency nadir and the rate-of-change-of-frequency can be significantly reduced and some power reserve still maintained after a frequency event.
关键词： variable droop control,offline maximum power point tracking,photovoltaic power plants,system inertia,frequency support,renewable energy sources
更新于2025-09-19 17:13:59