Relay protection adaptability detection system and method based on moving die wind-solar complementary

Abstract

The invention particularly relates to a relay protection adaptability detection system and method based on moving die wind-solar complementary. The system comprises an equivalent fan system physical simulation unit, a photovoltaic power physical simulation unit, a load physical simulation unit, an infinite-bus system physical simulation unit, a transformer physical simulation unit and a power transmission line physical simulation unit, wherein the equivalent fan system physical simulation unit and the photovoltaic power physical simulation unit are connected with the infinite-bus system physical simulation unit through the transformer physical simulation unit and the power transmission line physical simulation unit; meanwhile, the load physical simulation unit is connected with the infinite-bus system physical simulation unit. The detection method improves the fault analysis accuracy, provides a scientific basis for the relay protection adaptability research of wind-solar complementary systems, and has high practicability in engineering practice.

Description

technical field [0001] The invention relates to a detection system and method, in particular to a relay protection adaptive detection system and method based on dynamic-model wind-solar complementarity. Background technique [0002] With the large-scale access of distributed power sources, the structure of the traditional single-power radial distribution network has been fundamentally changed, and the electrical characteristics of the distribution system after a fault have changed dramatically, thus making the relay protection of the traditional distribution network It is difficult to adapt to the requirements of grid operation safety after distributed power generation is connected. On the one hand, renewable energy represented by photovoltaics and wind power has the characteristics of intermittent and randomness, and their distributed access will affect the short-circuit level, reactive power and voltage distribution, relay protection configuration and parameters of the dis...

AI Technical Summary

Problems solved by technology

At the same time, the high-frequency action of a large number of power electronic equipment interacts with the energy storage components in the microgrid, which may cause harmonic current amplification and endanger the safety of grid equipment

It is difficult to guarantee stable energy output by independent wind energy and photovoltaic power generation systems. Wind energy and solar energy have strong natural complementarity in time and region.

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