Control method of grid closed loop operation impact current

Abstract

The invention relates to the technical field of grid control and specifically relates to a control method of a grid closed loop operation impact current. The control method includes the following steps that a closed loop operation switch and a system display interface are arranged according to real-time grid operation data section, and a recording way is provided; a dispatcher records a line protection current setting value, and system checking is performed; if a reasonable loop can not be searched, the fact that a loop closed way is unreasonable is prompted, and resetting is performed; if reasonable loop information can be searched, phase checking is performed, unreasonable reasons are prompted if the checking doesn't pass, loop closed topological information and display are observed if the checking passes, and then click calculation is performed; admittance matrixes are used to obtain loop closed port impedance, initial tidal current of online grid data is calculated, injection volumes of loop closing points are revised, whole net tidal current calculation is performed after loop closing, and off-limit analysis of a whole net is performed after the loop closing; risk information is prompted; and results of topological information are displayed. According to the control method, risks can be effectively reduced, and small loop closing impact current can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of power grid control, in particular to the control of the surge current during the loop closing operation of the power grid. Background technique [0002] When the regional power grid is in operation, switching power supply is an important measure to ensure the reliability of the system power supply. In the project of switching power supply, short-term loop closing is essential. During and after loop closing, whether the loop current Within the allowable range, the power dispatcher must consider the impact of closed-loop power flow on other equipment. [0003] For the purpose of ring closing, in the past, in order to ensure the power supply demand for customers during line maintenance, etc., for a line, it is usually to set up a parallel line first, then disconnect one side of the line, and then connect the other side of the parallel line, so as to first The purpose of re-powering after a power outage will...

AI Technical Summary

Problems solved by technology

In the prior art, in terms of solving the port impedance, the traditional method is a rough calculation method of accumulating the loop-closing path impedance, which is actually to obtain the port impedance based on experience. If the value error is large, the risk of implementing loop closure operation will naturally be large

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