A black-start control method for wind-solar-hydraulic complementary microgrid

Abstract

The invention relates to a wind, solar and water complementary-type micro grid black start control method and belongs to the technical field of optimal control of electric power system micro grids. The method includes the steps that micro grid basic data are read in; distributed power supplies meeting the black start conditions serve as black start power supply alternative units; the black start power supply alternative units are sorted according to power, and the units are sequentially selected as the black start units one by one; according to whether the distributed power supplies are black start power supplies or not and whether the distributed power supplies participate in isolated grid frequency control or not, control strategies or controller parameters are selected, and alternative micro grid black start schemes are obtained; the obtained micro grid black start schemes are subjected to simulation calculation, whether voltages of all nodes of a micro grid and the frequency of the micro grid meet the constraint conditions about stability, a safety threshold and the like is judged when the isolated grid runs in the black start process according to the alternative schemes, the alternative schemes meeting the constraint conditions serve as feasible schemes, and an optimal scheme is selected from the feasible schemes. Due to the method, it is guaranteed that the wind, solar and water complementary-type micro power grid has high reliability and economical efficiency.

Description

technical field [0001] The invention belongs to the technical field of optimization control of electric power system micro-grids, and in particular relates to a black-start optimization control method of a micro-grid containing wind power, photovoltaics, and small hydropower. Background technique [0002] Black start means that after the power grid is completely shut down, without relying on external power supply, the units with self-starting ability in the system drive the units without self-starting ability, gradually expand the scope of system recovery, and finally realize the recovery of the entire system. [0003] After the microgrid has a total shutdown accident in the large power grid or its own isolated grid operation and a total shutdown accident, the safe and rapid black start is of great practical significance to ensure the power supply of critical loads. Microgrid black start control requires active and reactive power control of small hydropower, wind, solar and ...

AI Technical Summary

Problems solved by technology

[0004] At present, there are many researches on the black start of the micro-grid including wind, photovoltaic and energy storage devices. For the black start of the regional small hydropower / wind and photovoltaic new energy micro-grid, especially the black start process and the isolated grid operation after the black start is successful, Coordinated control of active power control devices of various power sources, and less research on frequency control of isolated grids

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