| 引用本文: | 葛乐,张伟,袁晓冬,陈继忠,钟礼海.自储能多端背靠背柔性直流系统控制策略[J].电力自动化设备,2019,39(12): |
| GE Le,ZHANG Wei,YUAN Xiaodong,CHEN Jizhong,ZHONG Lihai.Control strategy of self-energy storage based multi-terminal back-to-back VSC-HVDC system[J].Electric Power Automation Equipment,2019,39(12): |
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| 摘要: |
| 为了解决自储能多端背靠背柔性直流系统的协调控制与电压稳定问题，提出了一种改进的电压裕度控制策略。首先建立了系统的数学模型，然后针对3种典型的运行场景设计了协调工作机制及其控制方式。基于Lyapunov稳定性理论设计了自适应指令滤波反推电压控制器，解决了系统控制方式切换导致的功率振荡与电压波动问题，改善了系统的稳定性和动态响应性。最后分别对3种典型的运行场景进行仿真分析，验证了所提控制策略和方法的有效性。 |
| 关键词: 多端背靠背柔性直流系统 自储能 协调控制策略 自适应指令滤波反推控制 电压稳定 |
| DOI：10.16081/j.epae.201911005 |
| 分类号:TM721.1 |
| 基金项目:国家自然科学基金资助项目(51707089)；国网江苏省电力有限公司科技项目(J2018084)；新能源与储能运行控制国家重点实验室开放基金资助项目(DGB51201801660) |
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| Control strategy of self-energy storage based multi-terminal back-to-back VSC-HVDC system |
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GE Le1,2, ZHANG Wei3, YUAN Xiaodong4, CHEN Jizhong2, ZHONG Lihai1
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1.School of Electrical Engineering, Nanjing Institute of Technology, Nanjing 211167, China;2.State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems, China Electric Power Research Institute Co.,Ltd.,Beijing 100192, China;3.Changzhou Power Supply Company of State Grid Jiangsu Electric Power Company Co.,Ltd.,Changzhou 213000, China;4.Electric Power Research Institute of State Grid Jiangsu Electric Power Company Co.,Ltd.,Nanjing 211103, China
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| Abstract: |
| In order to solve the problems of coordinated control and voltage stability of SES-VSC-MTDC(Self-Energy Storage based Multi-Terminal back-to-back VSC-HVDC) system, an improved voltage margin control strategy is proposed. Firstly, the system mathematical model is established, and then the coordinated working mechanism and its control mode are designed for three typical operation scenarios. Based on the Lyapunov stability theory, an adaptive command-filtered backstepping voltage controller is designed to solve the problems of power oscillation and voltage fluctuation caused by the switching of system control mode, which improves the stability and dynamic response of the system. Finally, the simulation analysis of three typical operation scenarios is carried out to verify the effectiveness of the proposed control strategy and method. |
| Key words: multi-terminal back-to-back VSC-HVDC system self-energy storage coordinated control strategy adaptive command-filtered backstepping control voltage stability |
