Multi-agent system based distributed voltage control method for active power distribution network

Abstract

A multi-agent system based distributed voltage control method for an active power distribution network comprises the steps of: analyzing the voltage sensitivity of any node of a radial power grid; taking the minimum area control cost as a target function by each agent in a multi-agent system, and performing voltage coordination control of the active power distribution network, wherein the target function consists of two parts, namely the voltage cost and the power cost, the voltage cost is used for constricting the voltage of each node, and the power cost is used for reducing the reduction of the active power of distributed generation (DG); and according to a voltage coordination control algorithm in each agent and a coordination result of each agent and adjacent agent, making a decision for enabling the voltages of all the nodes in the power grid to be within the set range by each agent, and reducing the reduction of the active power of the DG on the premise of voltage control. The method can not only solve the problem of voltage excess of the active power distribution network but also reduce the reduction of the active power of the DG, and ensures the economy for power distribution network operation as far as possible.

Description

technical field [0001] The invention relates to a distributed voltage control method of a distribution network. In particular, it relates to a distributed voltage control method for active distribution networks based on multi-agent systems. Background technique [0002] For a long time, human beings have excessively exploited and utilized non-renewable energy, which has caused the shortage of traditional energy and the pollution of the ecological environment. In this context, Distributed Generation (DG) has received more and more attention and application because of its utilization of clean energy. With the gradual increase in the penetration rate of DGs, new shiftable loads, and distributed energy storage, the distribution network has changed from a passive one-way power supply network to an active network with two-way power flow. The operation and control of power distribution systems face many challenges, such as: voltage control, power flow management, relay protection...

AI Technical Summary

Problems solved by technology

[0006] 1) All measurement data in the system must be transmitted to the central control system. Once the central control system fails, the entire network management and control system will collapse;

[0007] 2) The central control system can make a global control strategy after receiving the entire network data and a large number of optimization calculations. At the same time, taking into account the delay of hardware equipment, the centralized control method takes a long time to adjust the system;

[0008] 3) The DG penetration rate in the active distribution network is high, and the amount of data that needs to be measured and collected also increases significantly, which greatly increases the burden on the communication system;

[0009] 4) A complete centralized control system needs to install a large number of measurement, communication and monitoring systems, and the investment is relatively high

Images