融合功率变化率与裕度反馈的 VSC-MTDC 自适应下垂控制

徐晓宁; 叶宗文; 陶珑; 付强; 问虎龙

引用本文:	徐晓宁,叶宗文,陶珑,等.融合功率变化率与裕度反馈的 VSC-MTDC 自适应下垂控制[J].电力系统保护与控制,2026,54(09):124-136.
	XU Xiaoning,YE Zongwen,TAO Long,et al.Adaptive droop control of VSC-MTDC incorporating power change rate and margin feedback[J].Power System Protection and Control,2026,54(09):124-136

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融合功率变化率与裕度反馈的 VSC-MTDC 自适应下垂控制
徐晓宁^1,2，叶宗文^1,2，陶珑^1,2，付强^1,2，问虎龙^3,4
1. 天津理工大学电气工程与自动化学院，天津 300384；2. 天津市新能源电力变换传输与智能控制重点实验室，天津 300384；3. 天津瑞源电气有限公司，天津 300308；4. 天津瑞能电气有限公司，天津 300385

摘要:

针对新能源多端柔性直流并网系统中，传统固定系数下垂控制响应迟滞、功率分配不准确的问题，提出一种融合功率变化率感知与换流站功率裕度反馈的自适应下垂控制策略。首先，建立功率变化率感知机制，通过感知直流功率扰动速率动态修正下垂系数，以改善系统暂态响应特性。然后，引入换流站功率裕度反馈因子，根据剩余容量调整功率分配权重，优化不平衡功率分配过程，降低换流站过载风险。最后，在 MATLAB/Simulink 环境下搭建四端环形柔性直流输电系统模型，对稳态运行、功率阶跃扰动、宽频连续扫频功率扰动及换流站退出等典型工况进行仿真验证。仿真结果表明，该策略可实现不平衡功率的合理分配，并有效提升直流电压控制精度与功率分配灵活性。

关键词: 多端柔性直流输电系统直流电压自适应下垂控制功率变化率功率裕度功率分配

DOI：10.19783/j.cnki.pspc.251207

分类号:

基金项目:国家重点研发计划资助项目(2024YFB4207000)

Adaptive droop control of VSC-MTDC incorporating power change rate and margin feedback

XU Xiaoning^1,2, YE Zongwen^1,2, TAO Long^1,2, FU Qiang^1,2, WEN Hulong^3,4

1. School of Electrical Engineering and Automation, Tianjin University of Technology, Tianjin 300384, China; 2. Tianjin Key Laboratory of Renewable Energy Power Conversion Transmission and Intelligent Control, Tianjin 300384, China; 3. Tianjin Ruiyuan Electric Co., Ltd., Tianjin 300308, China; 4. Tianjin Ruineng Electric Co., Ltd., Tianjin 300385, China

Abstract:

Aiming at the problems of sluggish response and inaccurate power sharing in traditional fixed-coefficient droop control for multi-terminal flexible DC systems (MTDC) integrated with renewable energy, an adaptive droop control strategy incorporating power change rate perception and converter station power margin feedback is proposed. First, a power change rate perception mechanism is established to dynamically adjust the droop coefficient by sensing the rate of DC power disturbances, thereby improving the system's transient response characteristics. Then, a converter station power margin feedback factor is introduced to adjust the power sharing weights according to the remaining capacity, optimizing the imbalance in power distribution and reducing the risk of converter overloading. Finally, a four-terminal ring-shaped VSC-MTDC system model is developed in the MATLAB/Simulink environment, and simulations are conducted under typical operating conditions, including steady-state operation, power step disturbances, wideband continuous sweep power disturbance, and converter station outages. The simulation results show that the proposed strategy achieves rational allocation of unbalanced power and effectively improves DC voltage control accuracy and power sharing flexibility.

Key words: multi-terminal flexible DC transmission system DC voltage adaptive droop control power change rate power margin power sharing

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