An Optimal Control Method for Photovoltaic Power Stations Actively Participating in Power Auxiliary Services

Abstract

The invention relates to the technical field of new energy power generation, in particular to a photovoltaic power station optimization control method that actively participates in electric auxiliary services. The method comprises the following steps: determining the coordinated control strategy of the AGC primary frequency regulation and the secondary frequency regulation of the photovoltaic power station; determining the active power control and distribution mode of the photovoltaic power station; determining the optimal control strategy based on the reactive power of the AVC photovoltaic power station; determining the reactive power control of the photovoltaic power station ,Allocation. The advantages of the present invention: (1) Under steady-state conditions, the reactive power of the inverter is fully utilized to reduce the reactive power load of the reactive power compensation device SVC / SVG, thereby reducing the power consumption of the reactive power compensation device and reducing the power consumption of the factory. , to increase the on-grid electricity of distributed photovoltaic power plants. (2) Ensure that the reactive power compensation device SVC / SVG reserves more reactive power adjustability when it is in a steady state. In the transient process, it can have enough reactive power compensation capacity, so as to ensure the voltage stability in the transient process and avoid Inverter off grid.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to an optimal control method for a photovoltaic power station that actively participates in power auxiliary services. Background technique [0002] The development of solar photovoltaic power generation technology began in the 1950s. With the tightening of the global energy situation, solar photovoltaic power generation, as a sustainable energy alternative, has shown a momentum of rapid development under the strong impetus of technological progress and regulations and policies, and has been widely used around the world. Large-scale grid-connected photovoltaic power stations are the inevitable result of photovoltaic power generation moving toward electric power scale applications. Grid-connected photovoltaic power stations at home and abroad are developing from small and medium-sized to large-scale. Qinghai Province is extremely rich in solar energy resources and...

AI Technical Summary

Problems solved by technology

[0003] Photovoltaic power stations are grid-connected power sources for power electronics, including photovoltaic inverters and reactive power compensation devices (usually SVG or SVC), with flexible adjustment characteristics, but the current photovoltaic power stations have not yet developed the function of actively participating in auxiliary services of the power system, wasting their own Excellent performance while reducing the inertial capacity of the power grid, which poses challenges to the stable operation of the power grid

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