Low-voltage big user integrated protection control method for power distribution network

Abstract

The invention discloses a low-voltage big user integrated protection control method for a power distribution network, comprising establishing a power distribution network area autonomous management system that includes a low-voltage large user intelligent terminal, a public transformer intelligent base station and an area intelligent control center which are in mutual communication connection by an integrated communication network; dynamically configuring a low-voltage load rated capacity according to change of power distribution network load; timely monitoring load groups of a public transformer area and collecting data of the same, when the electrical load of the public transformer area exceeds the rate capacity, controlling the low-voltage large user intelligent terminal to perform overloaded regulation and control on the power distribution network in a plurality of gradient manners, and dynamically recording the maximum load data of the power distribution network. Through the integrated communication network, transmitting the maximum load data to the public transformer intelligent base station by the low-voltage large user intelligent terminal to analyze and forecast the load groups, transmitting the analyzed data to the area intelligent control center by the public transformer intelligent base station, and thereby achieving power quality and line loss background analysis, and overall regulation and control on the power distribution network.

Description

technical field [0001] The invention relates to the technical field of distribution network protection, in particular to an integrated protection control method for large low-voltage users of a distribution network. Background technique [0002] The power system has become an important infrastructure for the development of various fields. With the wide application of power electronic technology in power and the access of various new power loads, a large number of nonlinear, impact and fluctuating loads have been added to the power supply system, causing power grid Current and voltage waveforms are distorted and harmonic pollution, and the three-phase imbalance is becoming more and more serious, resulting in increased power loss, reduced safety of power supply equipment, and weakened the reliability and economy of power grid operation. According to incomplete statistics, more than 95% of the power outages suffered by power users are caused by the power distribution system exc...

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Problems solved by technology

[0002] The power system has become an important infrastructure for the development of various fields. With the wide application of power electronic technology in power and the access of various new power loads, a large number of nonlinear, impact and fluctuating loads have been added to the power supply system, causing power grid Current and voltage waveforms are distorted and harmonic pollution, and the three-phase imbalance is becoming more and more serious, resulting in increased power loss, reduced safety of power supply equipment, and weakened the reliability and economy of power grid operation

According to incomplete statistics, more than 95% of the power outages suffered by power users are caused by the power distribution system except for the factors of insufficient power generation; nearly half of the power system losses are generated in the distribution network. Therefore, the distribution network is The main factors causing the deterioration of power quality

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