Control method and system for 10kV and lower distribution grid no power voltage optimized operation

Abstract

The invention discloses a reactive power voltage optimal operation control method of a distribution network of 10kV or below, which collects the voltage, current, active power, reactive power and Power and other parameters are uploaded to the main control server, and the main control server simultaneously obtains the voltage, current, active power, reactive power and other parameters of the substation transformer forwarded by the reactive power optimization server of the regional power grid through the SCADA interface server to optimize reactive power and voltage Calculated by adjusting the on-load tap-changer of the main transformer of the substation upward or adjusting the switching switch of the reactive power compensation comprehensive measurement and control device of the distribution network downward. The goal of voltage optimization control is changed from "ensure the qualified voltage of the 10kV busbar in the substation" to "ensure the qualified voltage at the end user end of the distribution network". The function layer is balanced in situ.

Description

technical field [0001] The invention relates to a control method and system for optimal operation and control of reactive voltage of a power distribution network of 10kV or below. Background technique [0002] Power system reactive power and voltage control can be divided into three levels: one is power customer level, namely 10kV and below distribution network; the other is 220KV and below transmission network level, including power plants; the third is 220KV and above power grids, excluding power plants. At present, the distribution network of 10kV and below undertakes the huge power supply task of power customers. It is the main responsibility of the power supply system to increase qualified power to power customers and ensure reliable power supply. The voltage qualification rate is the most important quality index of the distribution network, and the distribution line loss rate is the most important economic index of the distribution network. Effective voltage control,...

AI Technical Summary

Problems solved by technology

This kind of compensation device only relies on collecting the reactive power and voltage value of a public distribution transformer for switching control, and cannot comprehensively analyze, judge and control the reactive power and voltage of a line or the entire distribution network, resulting in insufficient use of compensation capacity, and the entire line low level of compensation

while not directly applying line compensation

[0005] 3. The existing 0.40KV low-voltage reactive power compensation automatic control device cannot receive remote control, the structure is complex, the cost is high, the failure rate is high, and the influence of low-voltage harmonics is not considered

[0007] In the past, due to the lack of implementation of distribution network automation and residential centralized meter reading system, it is very difficult to realize the automatic control of distribution network voltage and reactive power optimization operation

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