Reactive power regulation method of photovoltaic power station inverter group

Abstract

The invention discloses a reactive power regulation method for an inverter group of a photovoltaic power station. The reactive power regulation method comprises the following steps: acquiring a to-be-regulated reactive power quantity, a transformer parameter and an inverter parameter of a to-be-regulated photovoltaic power station; according to the reactive quantities to be adjusted, the transformer parameters, the inverter parameters and a preset voltage balance reactive power distribution algorithm, first reactive power adjustment quantities of the photovoltaic arrays and second reactive power adjustment quantities of the inverters in the photovoltaic arrays are obtained through calculation, and the first reactive power adjustment quantities are reactive power adjustment quantities distributed to the photovoltaic arrays from the reactive quantities to be adjusted; the second reactive adjustment amount is the reactive adjustment amount distributed by the inverter from the first reactive adjustment amount, and each photovoltaic array comprises a plurality of photovoltaic arrays and a plurality of inverters; and each inverter in each photovoltaic array performs reactive power adjustment according to the second reactive power adjustment amount. According to the method, the overall reactive compensation requirement of the power station is met, meanwhile, the inverters can calculate the reactive compensation amount of voltage balance according to the conditions of the inverters, and the generating capacity and the anti-interference capacity of the power station are improved.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a reactive power adjustment method for inverter groups of photovoltaic power plants. Background technique [0002] With the tightening of the global energy situation, solar photovoltaic power generation, as a sustainable new energy source, has been widely used all over the world. In recent years, with the advancement of the strategy of "carbon peaking and carbon neutrality", the development of photovoltaic power plants has ushered in an explosive period, and grid-connected photovoltaic power plants at home and abroad are developing from small to medium-scale to large-scale. [0003] However, the strong randomness of photovoltaic power generation leads to uncontrollable output and difficulty in regulation. With the access of a high proportion of distributed energy sources and the construction of new power systems, the number and capacity of distributed photo...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a reactive power adjustment method for photovoltaic power station inverter groups to solve the technical problem of poor power quality caused by the lack of reactive power compensation devices inside the photovoltaic power station

Images