直流输电系统中一种高压调节方法及其控制策略

IF 0.6 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Recent Advances in Electrical & Electronic Engineering Pub Date : 2023-07-05 DOI:10.2174/2352096516666230705113828

Li Ji, Guo ZhenYu, Zhang Xueyou, Huang Daojun

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引用次数: 0

摘要

随着输电系统的发展，传统交流配电方式传输容量小、电能质量低等问题日益突出。直流配电方式以其适合分布式发电与电网连接、电能质量高、供电容量大、线路成本低、可靠性高等特点，促进了自身的快速发展。为了改善系统功率波动时的暂态性能，在系统级控制计算各换流站功率指令值的过程中，设计了一种能够对直流系统进行电压调节的控制方法。仿真结果表明，所设计的控制方法能有效改善直流输电系统的惯性特性和暂态响应。针对传统双闭环PI控制器作为变换器电平控制器时响应速度慢、稳定性差的缺点，设计了一种滑模控制器。仿真结果表明，所设计的滑模控制器可以改善电压调节的暂态特性。验证了基于换流站的直流输电网电压控制策略。设计了一种基于分布式发电和二次负荷切换的电压控制策略。仿真结果验证了所设计控制策略的有效性。

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One High Voltage Regulation Method and Related Control Strategy in the DC Transmission System

With the development of power transmission system, the problem of small transmission capacity and low power quality of traditional AC power distribution methods is becoming increasingly prominent. The DC power distribution method promotes its own rapid development because of its suitability of connection between distributed generation and grid, high power quality, large power supply capacity, low line cost and high reliability. In order to improve the transient performance when the system power fluctuates, a control method that can perform voltage regulation to the DC system is designed in the process of calculating the power command value of each converter station at the system level control. Simulation results show that the designed control method can effectively improve the inertial characteristics and transient response of DC transmission system. Aiming at the shortcomings of slow response speed and poor stability when the traditional dual closed-loop PI controller is used as a converter level controller, a sliding mode controller is designed. Simulation results show that the designed sliding mode controller can improve transient characteristics of voltage regulation. Voltage control strategy of the DC transmission network based on the converter station is verified. A voltage control strategy based on distributed generation and secondary load switching is designed. The simulation verifies the effectiveness of the designed control strategy.

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来源期刊

Recent Advances in Electrical & Electronic Engineering ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

1.70

自引率

16.70%

发文量

101

期刊介绍： Recent Advances in Electrical & Electronic Engineering publishes full-length/mini reviews and research articles, guest edited thematic issues on electrical and electronic engineering and applications. The journal also covers research in fast emerging applications of electrical power supply, electrical systems, power transmission, electromagnetism, motor control process and technologies involved and related to electrical and electronic engineering. The journal is essential reading for all researchers in electrical and electronic engineering science.