Abstract
The photovoltaic virtual synchronous generator (PV-VSG) solves the problem of lack of inertia in the PV power-generation system. The existing PV plants without energy storage are required to participate in the power grid's frequency modulation (FM), but existing PV-VSGs with energy storage have high requirements for coordinated control. Therefore, the active power reserve PV-VSG (APR-PV-VSG) is studied. Based on the different methods to obtain the maximum power point (MPP), the peer-to-peer and master-slave APR-PV-VSG strategies are proposed. The PV inverters are deviated from the MPP to reserve active power, which is used as the virtual inertia and primary FM power. These methods equip the PV power station with FM capability. The effectiveness of the proposed control strategies is verified by simulation results.
Highlights
The photovoltaic virtual synchronous generator (PV-VSG) solves the problem of lack of inertia in the PV power-generation system
The virtual synchronous generator (VSG), which simulates the external characteristics of synchronous generators, is gradually being developed[5,6,7]
Since PV systems are susceptible to environmental influences, some researchers have studied the photovoltaic virtual synchronous generator (PV-VSG), which applies VSG technology to traditional PV power-generation systems, and make them participate in the grid frequency regulation
Summary
Photovoltaic (PV) power generation has been developed rapidly in recent years[1,2]. large-scale PV plants reduce the equivalent moment of inertia of the power system and weaken the primary frequency-response capability[3,4]. Since PV systems are susceptible to environmental influences, some researchers have studied the photovoltaic virtual synchronous generator (PV-VSG), which applies VSG technology to traditional PV power-generation systems, and make them participate in the grid frequency regulation. ESSs are usually equipped on the DC or AC side of PV systems, and can effectively provide frequency modulation (FM) of the power output in a short time by controlling the charging. In this letter, according to different methods of acquiring the maximum power point (MPP) of PV power stations, the peer-to-peer and the master-slave control strategies of the active power reserve PV-VSG (APR-PV-VSG) are proposed, where the reserve power is used as the inertia power and primary FM power. The simulation results are provided to verify the effectiveness of the proposed control strategies
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
