System and method for two-level distribution network coordination control based on load forecasting

Abstract

The invention discloses a system and a method for two-level distribution network coordination control based on load forecasting. The system comprises gateways, a first-level control module and a second-level control module. The design core of the method of the invention is as follows: a medium and low-voltage distribution network proposes a reactive power regulation range constraint to a high-voltage distribution network, the high-voltage distribution network proposes a voltage regulation range constraint to the medium and low-voltage distribution network, and both networks consider the constraints proposed by each other in optimization calculation, which not only embodies the voltage regulation capability of the high-voltage distribution network to the medium and low-voltage distribution network, but also embodies the reactive power compensation capability of the medium and low-voltage distribution network to the high-voltage distribution network. By adopting the system and the method of the invention, coordinated optimization control on the high-voltage distribution network and the medium and low-voltage distribution network is realized, and overall optimal voltage and reactive power control in the global range is realized, thereby reducing the network loss effectively and improving the voltage level of the distribution networks.

Description

technical field [0001] The invention relates to the technical field of voltage and reactive power control, and more specifically relates to a load forecast-based secondary coordinated control system and method for distribution networks. Background technique [0002] Voltage and reactive power control is to control the voltage and reactive power output of capacitor banks, transformer taps, distributed power sources, etc. after the active power dispatching of the power grid is completed, so that the operating state of the power grid tends to be optimal. The optimal control of voltage and reactive power can not only improve power quality and voltage stability margin, but also effectively reduce network loss. [0003] The distribution network involves many voltage levels, including 110kV, 35kV, 10kV, 0.4kV, etc.; the lines are radially distributed, the number of nodes is large and scattered, and the number of voltage and reactive power adjustment equipment is large and distribut...

AI Technical Summary

Problems solved by technology

In this way, the model information is not perfect, which brings certain difficulties to the coordinated control of the high-voltage distribution network and the medium-low voltage distribution network.

Images