Off-line test system and method for virtual inertia response based on flywheel energy storage device

Abstract

The invention belongs to the field of electric power technology, and discloses a virtual inertia response off-line test system and method based on a flywheel energy storage device. In the system, the engine is used to adjust the grid frequency upward according to the grid disturbance frequency command; the programmable resistance box It is used to adjust the grid frequency downward according to the grid disturbance frequency command; the energy storage converter is used for AC-DC conversion; the grid frequency simulation device is connected with the engine, programmable resistance box, energy storage converter and the flywheel energy storage device under test Flywheel master control modules are connected separately to detect grid parameters, generate grid disturbance frequency commands and flywheel response trigger commands according to grid parameters, send grid disturbance frequency commands to the engine or programmable resistance box, and send flywheel response trigger commands to flywheels Master control module. The system and method of the present invention can effectively simulate the characteristics of the power grid without requiring a grid connection test, reduce the debugging cost, and shorten the debugging time when the grid is connected on site.

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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