Interaction Mechanism Analysis and Additional Damping Control for Hybrid Multi-Infeed HVDC System
Interaction Mechanism Analysis and Additional Damping Control for Hybrid Multi-Infeed HVDC System
复制标题
混合多馈入高压直流输电系统的相互作用机制分析和附加阻尼控制
DOI：
10.1109/tpwrd.2022.3140826
复制
发表时间：
2022-10-01
影响因子：
4.4
通讯作者：
Deng, Lingfeng
中科院分区：
文献类型：
--
作者：
Yin, HanHang;Zhou, Xiaoping;Deng, Lingfeng
随着混合多馈入高压直流（HMIDC）系统的出现，交直流系统与换流站之间存在复杂的动态相互作用，而HMIDC系统的相互作用机理尚不清楚。为此，本文基于运动方程的概念，建立了HMIDC线性化模型。然后，通过对HMIDC系统的相互作用路径进行解耦和重构，得到了系统的阻尼系数。选取交流系统强度和电压源换流器（VSC）端电压控制器参数对阻尼系数的影响进行分析，并分析了HMIDC系统的相互作用机理。为了解决HMIDC系统潜在的不稳定问题，提出在VSC端电压环中增加阻尼控制器，通过调节无功/幅值耦合阻尼系数来提高HMIDC系统的电压稳定性。最后，基于RT-LAB的半实物仿真实验验证了HMIDC系统相互作用机理分析的准确性和所提出控制器的有效性。
With the emergence of the hybrid multi-infeed high voltage direct current (HMIDC) system, there is complex dynamic interaction between the AC/DC system and converter stations, while the interaction mechanism of the HMIDC system is unclear. For this purpose, this paper establishes the HMIDC linearized model based on the motion equation concept. Then, after decoupling and reconstructing the interaction path of the HMIDC system, the damping coefficients are derived. The AC system strength and voltage source converter (VSC) terminal voltage controller parameters are selected to analyze the impacts on damping coefficients, and the interaction mechanism of the HMIDC system is analyzed. In order to solve the potential instability issue, an additional damping controller in the VSC terminal voltage loop is proposed to enhance the voltage stability of HMIDC system, which is realized by adjusting the reactive power/amplitude coupling damping coefficient. Finally, the RT-LAB-based hardware-in-the-loop experiments verify the accuracy of the interaction mechanism analysis of the HMIDC system and the effectiveness of the proposed controller.