On-load voltage regulating transformer parameter setting method considering voltage qualification rate

Abstract

An on-load voltage regulating transformer parameter setting method considering the voltage qualification rate comprises the following steps: (1) collecting the voltage data of each time period of a transformer area in the last year are collected, setting the interval T of each time period to be 15 min, setting a voltage regulating reference value U0 to be 220 V, removing continuous and abnormal voltage data in the sequence Uk, forming a new voltage sequence Uk0 by the rest data, taking Uk0 (1) as an initial value, and selecting voltage data with a time interval of 4T to form a new voltage sequence Uk1; (2) calculating the maximum voltage rise and the maximum voltage drop between the outlet side and the user side according to the voltage sequence Uk1 and the voltage regulation reference value U0, and determining the value range of the voltage regulation sensitivity parameter of the on-load voltage regulation transformer; (3) calculating the maximum value V of the voltage change rate inthe sequence Uk0, and calculating the voltage regulation delay parameter t0 of the on-load voltage regulation transformer under the condition that the voltage Uq at the outlet side does not exceed themaximum voltage Ujy of the equipment. According to the invention, reasonable setting of the voltage regulation parameters of the on-load voltage regulation transformer is realized, and improvement ofthe voltage quality of the transformer area is facilitated.

Description

technical field [0001] The invention relates to a method for setting parameters of an on-load voltage regulating transformer considering the qualified rate of voltage, and belongs to the technical field of transformer operation. Background technique [0002] In recent years, with the large-scale access of distributed energy in my country, problems such as unqualified power supply voltage and suboptimal power flow distribution in the power system have become increasingly prominent. As a power distribution equipment connected to direct users, the on-load tap changer is widely used in power distribution systems because of its functions of stabilizing the load center voltage, adjusting line power flow, and connecting with the power grid to improve reactive power distribution. Specifically, the on-load tap changer can improve the qualified rate of voltage on the user side by adjusting the voltage regulation parameters to meet the customer's requirements for power quality. In fac...

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Problems solved by technology

In fact, too large a voltage regulation parameter can improve the voltage qualification rate on the user side, but if the number of tap changer operations is taken into account, a too large voltage regulation parameter may cause frequent tap changer operations, resulting in a lifespan of the on-load tap changer transformer. reduction of

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