电力建设2024，Vol.45Issue(9)：133-141,9.DOI:10.12204/j.issn.1000-7229.2024.09.012
基于自适应参考功率的多端柔直系统附加频率控制
Additional Frequency Control Based on Adaptive Reference Power for MTDC Systems
摘要
Abstract
With the development of high-capacity offshore wind facilities,modular multi-level converter-based multi-terminal high-voltage direct-current(MMC-MTDC)system technology becomes an important solution to realize wind power transmission. Additional frequency control of multi-terminal flexible DC systems leads to large DC voltage fluctuations and large frequency shifts of the grid on the non-disturbance side. To address this problem,we propose an adaptive reference power-based frequency regulation method for multiple flexible grid-connected systems. By adjusting the reference power of the converter station at the receiving end and distributing the unbalanced power due to frequency perturbation,the normal-side converter station can participate in frequency modulation while ensuring frequency stability. Virtual inertia control is simultaneously used to couple the frequency to the DC voltage,and the virtual inertia coefficients are adjusted according to the DC voltage deviation,thereby reducing the DC voltage offset. Simulation results show that the proposed control can reduce the DC voltage deviation while ensuring that the MMC-MTDC system participates in frequency regulation according to different frequency perturbations while keeping the normal-side AC grid frequency in a stable operating range.关键词
多端柔性直流系统/下垂控制/虚拟惯性控制/自适应参考功率Key words
MMC-MTDC/DC voltage control/virtual inertial control/adaptive reference power分类
信息技术与安全科学引用本文复制引用
赵平,高亨孝,贾浩森,李振兴..基于自适应参考功率的多端柔直系统附加频率控制[J].电力建设,2024,45(9):133-141,9.基金项目
国家自然科学基金项目(52077120) This work is supported by National Natural Science Foundation of China(No.52077120). （52077120）
