A photovoltaic power generation system model parameter identification test method

Abstract

The invention relates to a method for identifying and testing model parameters of a photovoltaic power generation system. The test method is to access a power grid disturbance simulator before the photovoltaic power generation system goes online, and complete the operation data of the photovoltaic power generation system under fault conditions without affecting the operation of the power grid. When testing the wiring, first stop the output of the grid-connected unit inverter of the photovoltaic power generation system, connect the test system in series to the grid-connected line of the photovoltaic power generation system, and connect the photovoltaic inverter output AC boost in series to the incoming line of the test system The circuit breaker is connected to the grid disturbance simulator after being stepped down by the step-down transformer. The grid disturbance simulator simulates single-phase, two-phase, three-phase different types of grid faults and grid system frequency faults, and then restores the voltage to On-grid voltage level, connected to the grid after passing through the on-grid circuit breaker. This method can provide accurate basis for identifying model parameters of photovoltaic power generation system under normal and fault conditions of the power grid.

Description

technical field [0001] The invention relates to a photovoltaic power generation system model parameter identification test method, in particular to a photovoltaic power generation system model parameter identification that can correctly reflect the operating conditions of the photovoltaic power generation system when a power grid fails. Background technique [0002] In recent years, my country has vigorously supported the development of new energy technologies. With the rapid increase in the proportion of solar photovoltaic power generation installed capacity, the power system, like wind turbines, puts forward the requirements for the operation capacity of large and medium-sized photovoltaic power stations connected to the power grid when the power grid has a transient fault. The national standard "Technical Regulations for Connecting Photovoltaic Power Stations to the Grid" clearly requires that large and medium-sized photovoltaic power stations have fault ride-through capabi...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in order to overcome the deficiency that the model parameter identification of the photovoltaic power generation system cannot The operation data of type grid faults can provide sufficient fault operation data for the identification of photovoltaic power generation system model parameters, and provide accurate basis for identification of photovoltaic power generation system model parameters under normal and fault states of the power grid

Images