A photovoltaic power station optimization control method actively participating in power auxiliary service

Abstract

The invention relates to the technical field of new energy power generation, in particular to a photovoltaic power station optimization control method actively participating in power auxiliary service. The method comprises the following steps: determining a coordinated control strategy of the primary frequency modulation and the secondary frequency modulation of the photovoltaic power station AGC;determining the active power control and distribution mode of a photovoltaic power station; determining the optimal control strategy of reactive power based on AVC photovoltaic power station; determining the reactive power control and distribution mode of the photovoltaic power station. The invention has the advantages of: (1) fully utilizing the non-functional force of the inverter under the steady state condition, reducing the reactive load of the reactive power compensation device SVC / SVG, reducing the power consumption of the reactive power compensation device, reducing the auxiliary power consumption, and increasing the on-grid power quantity of the distributed photovoltaic power station; (2) guaranteeing that the reactive power compensation device SVC / SVG can reserve more reactive power adjustable degree in steady state, and can have enough reactive power compensation ability a in transient process, so as to ensure voltage stability in transient process and avoid inverter disconnection.

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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