含直流潮流控制器的多端高压直流输电网络的小信号稳定性分析及控制系统设计
Small-Signal Stability Analysis and Control System Design of a Meshed Multi-Terminal High-Voltage Direct Current Grid with a Current Flow Controller
摘要: 在高压直流(HVDC)网络中，直流潮流控制器可以用来控制支路电流，但其同时也会影响整个HVDC系统的稳定性。因此，对于含直流潮流控制器的HVDC网络动态特性分析的研究必不可少。本文主要研究带直流潮流控制器的三端HVDC系统的小信号稳定分析。首先，基于已有的带直流潮流控制器的三端HVDC网络，搭建了小信号数学模型；其次在此基础上设计了对于直流潮流控制器的控制策略，实现整个系统的稳定要求。最后，在Simulink中建立带直流潮流控制器的三端HVDC仿真模型，在稳态和暂态运行工况下对所提控制策略进行仿真验证，并将其仿真结果与理论值进行对比，以此验证了直流潮流控制器对HVDC系统的动态影响。
Abstract: In a high-voltage direct current (HVDC) grid, a DC power flow controller can be used to control the branch current, but it also affects the stability of the entire HVDV system. Therefore, it is necessary to study the dynamic characteristics of HVDC grid with a DC current flow controller (CFC). This paper focuses on the small-signal stability analysis of a three-terminal HVDC system with a DC CFC. Firstly, a small-signal mathematical model is built based on the existing three-terminal HVDC network with a DC CFC, secondly, on this basis, the control strategy for the DC CFC is designed to achieve the stability requirements of the entire system. Finally, a three-terminal HVDC simulation model with a DC CFC is established in Simulink. The proposed control strategy is verified under steady-state and transient operating conditions, and the simulation results are compared with the theoretical values. The dynamic influence of the DC CFC on the HVDC system is also discussed.
文章引用：孙晓蕾, 杨伟. 含直流潮流控制器的多端高压直流输电网络的小信号稳定性分析及控制系统设计[J]. 电气工程, 2019, 7(1): 44-52. https://doi.org/10.12677/JEE.2019.71005

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