Multi-objective optimization control method for excitation system of synchronous phase modifier in high-voltage direct-current power transmission system

Abstract

The invention discloses a multi-objective optimization control method for an excitation system of a synchronous phase modifier in a high-voltage direct-current power transmission system in the field of excitation control of the synchronous phase modifier. The method can optimize and adjust the reactive characteristics of the synchronous phase modifier and ensure the quick adjustment effect of reactive support of the synchronous phase modifier on the voltage of an alternating-current system. And the problems that the reactive continuous regulation of the synchronous phase modifier cannot be suddenly changed and the reactive feedback of the synchronous phase modifier and the voltage feedback of the alternating-current system in the excitation system bring overvoltage to the alternating-current system are solved. The excitation system is a main excitation control system of a synchronous phase modifier in a receiving-end power grid of the high-voltage direct-current power transmission system. The method comprises the following steps: aiming at the synchronous phase modifier excitation control system which introduces synchronous phase modifier reactive outer loop control and alternating current system voltage outer loop control on the basis of voltage closed loop control, establishing a multi-objective optimization mathematical model of the synchronous phase modifier excitation system; and optimizing the multi-objective optimization mathematical model of the synchronous phase modifier excitation system by using a decomposition-based multi-objective evolutionary algorithm in combination with a fuzzy control method.

Description

Technical field[0001]The present invention belongs to the field of synchronous camera excitation control, and is specifically related to multi-objective optimization control method and system of synchronous camera excitation system in high voltage DC transmission systems.Background technique[0002]High voltage DC transmission (HVDC) system voltage stability problem is mainly due to insufficient dynamic reactive support during the fault, and the synchronous adjustment camera has the reactive function to meet the transient inactive demand in the transient process of high voltage DC transmission system, synchronous adjustment camera There is a reactive output characteristic with high reactive output capacity, high incentive, and high and low pressure travel, it is just to meet the dynamic reactive demand for failure instantaneous grids. The excitation system is an important part of the synchronous adjustment camera, establishing a field system and its control system model, making a suit...

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Problems solved by technology

[0004] In order to solve the deficiencies in the prior art, the present invention provides a multi-objective optimization control method and system for the excitation system of the synchronous condenser in the high-voltage direct current transmission system, which can optimize and adjust the reactive power characteristics of the synchronous condenser and ensure the reactive power of the synchronous condenser Support the rapid regulation of the voltage of the AC system, and solve the overvoltage problem caused by the reactive power feedback of the synchronous condenser in the excitation system and the AC system voltage feedback to the AC system that cannot be mutated in the continuous adjustment of the reactive power of the synchronous condenser.

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