10kV power distribution network global reactive power and voltage optimization system based on distributed series and parallel compensation and intelligent control thereof

Abstract

The invention relates to a 10kV power distribution network global reactive power and voltage optimization system based on distributed series and parallel compensation and intelligent control thereof.The reactive power and voltage optimization system comprises a plurality of parallel capacitor intelligent compensation devices, a plurality of series capacitor intelligent compensation devices and anintelligent optimization control system main station which is installed in a 110 / 10kV or 220 / 10kV transformer substation, the parallel capacitor intelligent compensation devices are connected in parallel in the 10kV distribution line, each parallel capacitor intelligent compensation device comprises a three-phase capacitor bank, a switching contactor, a voltage transformer, a current transformerand a local intelligent controller, and the 10kV distribution line is connected in series with a series capacitor intelligent compensation device. The series capacitor intelligent compensation devicecomprises a three-phase capacitor bank, a protection bypass device, a voltage transformer, a current transformer and an on-site intelligent controller. The 10kV power distribution network global reactive power and voltage optimization system has the beneficial effect that global voltage and reactive power optimization of a 10kV power distribution network can be realized.

Description

technical field [0001] The invention belongs to the field of distribution network optimization control, in particular to a 10kV distribution network global reactive power and voltage optimization system based on distributed series and parallel compensation and intelligent control thereof. Background technique [0002] The voltage quality of 10kV distribution network is an important indicator to measure whether the quality of power supply meets the standard, and its quality is directly related to the safe and economical operation of electrical equipment and the normal operation of production. my country's 10kV distribution network covers a wide area and has a long total length, and most of the 10kV lines in rural areas have small paths, long lines (especially mountain village lines), a large number of distribution transformers, and even many lines with multiple large-capacity motors or changes Rapid industrial load often leads to low voltage at the end of the line, serious vol...

AI Technical Summary

Problems solved by technology

But there are still the following problems: 1) Most of the configured shunt compensation capacitors are not equipped with local intelligent controllers, or even though local controllers are configured, they cannot control the compensation capacity in real time according to the change of distribution network load; 2 ) There is no central control system to coordinate each compensation device to achieve the purpose of global optimization of reactive power and voltage; 3) The control of compensation devices in different installation locations is not coordinated, and the phenomenon of "fighting" (oscillation) occurs

Images