A Parameter Measurement Method of Virtual Synchronous Generator

Abstract

The invention relates to a parameter measurement method for a virtual synchronous generator. The method comprises steps: a parameter measurement structure for a photovoltaic virtual synchronous generator is built, wherein the parameter measurement structure for the photovoltaic virtual synchronous generator comprises the photovoltaic virtual synchronous generator, a measurement device, a power grid simulation device and a power grid; a primary frequency modulation function of the photovoltaic virtual synchronous generator is closed, an active power instruction curve for the photovoltaic virtual synchronous generator is set, and the measurement device is used to acquire the active power output characteristic curve for the photovoltaic virtual synchronous generator; and according to the active power output characteristic curve for the photovoltaic virtual synchronous generator, the damping coefficient and the moment of inertia of the photovoltaic virtual synchronous generator are determined. According to the method provided in the invention, the damping coefficients and the moments of inertia of various types of photovoltaic virtual synchronous generators can be determined, and a good basis is provided for pushing making of related standards of the photovoltaic virtual synchronous generator.

Description

technical field [0001] The invention relates to the field of photovoltaic detection, in particular to a method for measuring parameters of a virtual synchronous generator. Background technique [0002] Due to the low inertia level of traditional photovoltaic power stations, as the proportion of large-scale photovoltaic access to the grid increases, the inertia level of the power system will decrease, affecting the safe and stable operation of the system. In order to promote the large-scale development and utilization of new energy, the State Grid Corporation of China has carried out the construction of a virtual synchronous machine demonstration project (phase I) with a total capacity of 140MW at the Zhangbei wind-solar storage base, providing a typical demonstration for the construction of a grid-friendly new energy power station. [0003] There is no strict definition of photovoltaic virtual synchronous generator. It is generally considered to be a device or device group b...

AI Technical Summary

Problems solved by technology

At present, there is no unified test method for photovoltaic virtual synchronous generators with different technical routes, and the technical regulations and test procedures for grid-connected performance of virtual synchronous generators at home and abroad are blank. The New Energy Research Center of China Electric Power Research Institute undertakes the enterprise standard The compilation of "Unitized Photovoltaic Virtual Synchronous Generator Technical Requirements and Test Methods" and the testing of photovoltaic virtual synchronous generator are currently in their infancy

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