Optimal allocation method of power shortage after fault of multi-DC sending-end grid

Abstract

The invention discloses an optimal allocation method of power shortage after fault of a multi-DC sending-end grid. The method comprises the following steps: reading grid related data and carrying outanalysis and processing on the data; calculating power variation of each provincial-level control area, and judging and positioning a fault provincial-level control area; calculating actual power shortage amount of the whole grid obtained after a plurality of control measures; calculating power shortage allocation amount of each provincial-level control area and carrying out safety back calibration; if violating security constraints, calculating shortage power allocation correction of each provincial-level control area through regional equivalent power generation sensitivity; and issuing the shortage power allocation correction to each provincial-level control area in a forwarding and d remote regulating manner, and resetting to zero. The method realizes large power shortage multi-region coordinative and optimal allocation after fault and ensures quick recovery of frequency and safe and efficient operation of the multi-DC sending-end grid after disturbance by considering multi-stage scheduling and multi-class control measure action situations of the multi-DC sending-end grid after fault.

Description

technical field [0001] The invention relates to a post-fault power deficit optimization and allocation method for multi-DC sending-end power grids, which belongs to the technical field of power grid dispatching. Background technique [0002] With the continuous expansion of the scale of DC projects in my country, the impact of the DC transmission operation mode on the stability of the AC system is deepening. Compared with the load center system at the receiving end, the AC system at the sending end energy base generally has small scale, large installed capacity, and grid structure. Weakness and other characteristics, the frequency problem of the AC system at the sending end becomes more prominent after the system is disturbed. [0003] Most of my country's DC sending-end power grids are systems with a high proportion of clean energy such as hydropower. Hydropower units modify the parameters of governors to suppress ultra-low frequency oscillations caused by water hammer effec...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a post-failure power deficit optimization and allocation method for multiple DC sending end power grids, and solve the technical problem in the prior art that it is difficult for the power grid to quickly support frequency recovery after a fault

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