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

Abstract

The utility model discloses a control method for optimal operation of reactive power and voltage in distribution network below 10kV, which is characterized in that a distribution network reactive compensating comprehensive control device is arranged on the distribution network to collect the parameters such as voltage, current, active power and reactive power of all nodes in the distribution network and send the parameters to a main control server; at the same time, the main control server receives the parameters such as voltage, current, active power and reactive power of the transformers in the transformer substation transmitted by the reactive optimal server of regional power networks through an SCADA interface server, and conducts reactive voltage optimal calculation, switching the changer through up regulating the main transformer on-load tap changer of the transformer substation or down regulating the distribution network reactive compensating comprehensive control device. The utility model changes the voltage optimal control goal from ensuring a qualified 10kV bus voltage in the transformer station to ensuring a qualified voltage of final user terminals in the distribution network, realizes the optical control of combining distribution network reactive voltage and transmission network, and realizes reactive hierarchical spot balance in the real sense.

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

Images