Virtual inertia response offline test system and method based on flywheel energy storage device

Abstract

The invention belongs to the technical field of electric power, and discloses a virtual inertia response offline test system and method based on a flywheel energy storage device. In the system, an engine is used for performing upward adjustment on power grid frequency according to a power grid disturbance frequency instruction; a programmable resistance box is used for carrying out downward adjustment on the power grid frequency according to the power grid disturbance frequency instruction; an energy storage converter is used for AC-DC conversion; a power grid frequency simulation device is connected with the engine, the programmable resistance box, the energy storage converter and a flywheel master control module of a to-be-tested flywheel energy storage device, and is used for detectingpower grid parameters, generating a power grid disturbance frequency instruction and a flywheel response trigger instruction according to the power grid parameters, sending the power grid disturbancefrequency instruction to the engine or the programmable resistance box, and sending a flywheel response trigger instruction to the flywheel master control module. According to the system and the method, power grid characteristic simulation can be effectively carried out, a grid-connected test is not needed, the debugging cost is reduced, and the debugging time during on-site grid-connected accessis shortened.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an off-line test system and method for virtual inertia response based on a flywheel energy storage device. Background technique [0002] At present, my country's total installed capacity of renewable energy power generation is 790 million kilowatts, accounting for 30% of the world's total installed capacity of renewable energy power generation. The installed capacity of hydropower, wind power, and photovoltaic power generation ranks first in the world. More and more intermittent energy sources are connected to the grid on a large scale, and their randomness brings new difficulties to the grid frequency control. [0003] The development of flywheel energy storage technology provides available means to alleviate the pressure of power grid frequency regulation. Establishing a safe test system between the manufacturer and on-site installation and commissioning is the key link...

AI Technical Summary

Problems solved by technology

[0004] Based on the fact that the power plant field test method cannot simulate the actual working conditions of the power grid, it can only be simply tested for charging or discharging. When connecting to the grid, it is easy to cause pollution to the grid, and there are many unforeseen factors during the test. During on-site commissioning It will also waste a lot of time and energy, and the economy is not strong

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