Intelligent power distribution network in-situ voltage control method based on synchronous phasor measurement equivalence

Abstract

The invention relates to an intelligent power distribution network in-situ voltage control method based on synchronous phasor measurement equivalence: for a selected incomplete considerable power distribution system, setting parameters for voltage control are set, and voltage observation nodes are set; the current voltage deviation of each voltage observation node is acquired; the voltage deviation values of the observation nodes are ranked from big to small; whether the voltage deviation of the nodes exceeds the limit value of voltage control or not, and the voltage measurement value is outside the control dead zone; whether the nodes have reactive residual capacity or not is judged; and historical measurement data of the synchronous phasor measurement device is acquired, and the parameter of the thevenin equivalent model of the whole power distribution system except the nodes is estimated; a voltage power sensitivity parameter which represents the relation between the voltage changeof the nodes and the power change at the nodes is calculated according to the thevenin equivalent model parameter; and the reactive input amount at the nodes is determined according to the voltage power sensitivity parameter. According to the method, the problem that the local voltage control precision is low is effectively solved, and the purpose of voltage control is achieved.

Description

technical field [0001] The invention relates to a local voltage control method of a distribution network. In particular, it relates to an on-site voltage control method of an intelligent distribution network based on synchronized phasor measurement equivalents. Background technique [0002] With the extensive access of new energy and demand response resources, the randomness and volatility of the user side of the distribution system have been significantly enhanced, and higher requirements have been put forward for the monitoring and control level of the distribution network. The application of synchronized phasor measurement devices at the distribution network level can not only effectively improve the ability to perceive the operating status of the distribution network, but also provide a new idea for the parameter identification and operation control of the distribution system. With the access of new energy, the risk of voltage exceeding the limit in the distribution net...

AI Technical Summary

Problems solved by technology

[0004] Different from the power transmission system, the current level of the distribution network cannot meet the requirements of the system to be fully sizable, and it is difficult to obtain a complete and accurate real-time operating status of the entire system to achieve system sizable and meet the measurement requirements of centralized voltage control

At the same time, the existing model-based voltage control methods all rely on accurate line parameters. When the line parameters are wrong or cannot be obtained, the voltage control results will have large deviations.

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