An optimization method for power grid operation mode to alleviate voltage sag

Abstract

The present invention discloses a power grid operation mode optimization method for relieving voltage sags. The method comprises the steps: the step 1, the determination of power grid selective operation modes: determining all the selective operation modes of the power grid to be optimized according to whether a switch is installed on each branch in the power grid to be optimized or not and the state of the installed switch; the step 2, the feasibility determination: performing feasibility determination of each selective operation mode and screening the feasible operation mode; the step 3, the economy determination: performing economy determination of the screened feasible operation mode and screening an economy operation mode; and the step 4: the optimization determination, wherein the process comprises the following steps: the 401, the calculation of the assessment indexes of the power grid operation mode, and the 402, the determination of the optimization operation mode. The power grid operation mode optimization method for relieving voltage sags is simple in step, reasonable in design, convenient to realize and good in usage effect, considers the transmission losses and can effectively relieve the voltage sags so as to realize the safe operation and economic operation of the power grid.

Description

technical field [0001] The invention belongs to the technical field of power grid optimization operation, and in particular relates to a power grid operation mode optimization method for alleviating voltage sag. Background technique [0002] With the rapid development of high-tech industries, voltage-sensitive loads have been widely used in various power consumption departments in modern industrial production. Sensitive loads mainly include programmable logic controllers, speed control drives, AC contactors, personal computers, etc. Although the voltage sag did not cause a complete power interruption between the system and power users, when the magnitude and duration of the voltage sag exceeded the tolerance of the key control equipment of the sensitive load, it would cause the programmable logic controller to fail, contact Device tripping, computer storage data loss, resulting in the scrapping of processed products on the production line, or motor shutdown, especially for ...

AI Technical Summary

Problems solved by technology

The traditional operation mode adjustment mainly takes the reduction of network loss and reactive power optimization as the objective function, and does not consider the situation of grid voltage sag. Since the problem of voltage sag in modern production is becoming more and more prominent, the traditional operation mode adjustment can no longer meet the requirements. Requirements for Electric Energy Supply in Modern Production

In the adjustment of the operation mode, it is necessary to consider how to alleviate the voltage sag of the power grid. The goal is to minimize the grid voltage sag caused by bus and branch faults, and the operation mode optimization method with the constraints of reducing network loss and reactive power optimization needs to be proposed.

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