中国电机工程学报2025，Vol.45Issue(7)：2645-2657,中插16,14.DOI:10.13334/j.0258-8013.pcsee.232214
基于梯形波补偿和功率自适应的HCSY-MG功率平衡控制策略
Power Balance Control Strategy for HCSY-MG Based on Trapezoidal Wave Compensation and Power Adaptation
摘要
Abstract
In a microgrid system with a series structure of micro-source half-bridge converters in a Y-connection configuration(HCSY-MG),the output power of wind and photovoltaic micro-sources varies significantly due to environmental influences.This variation can cause over-modulation in some half-bridge converter modules,leading to a decline in grid-connected current quality and compromising the system's stable operation.In this paper,a power balance control method combining trapezoidal wave compensation and power adaptive algorithm is studied.The trapezoidal wave compensation control can expand the linear modulation range of the system,and the power adaptive algorithm can ensure that when the maximum modulation range of the trapezoidal wave compensation is exceeded,the power of the preceding micro source can be adjusted adaptive,so that the difference of the output power between the micro source is reduced,and the system can avoid overmodulation.This method can ensure the safe and stable operation of the system under the condition of serious unbalance of micro-source output power and the grid-connected current total harmonic distortion(THD)meets the requirements of grid-connected.Finally,the proposed control strategy is validated through simulation and experiments to determine its feasibility and effectiveness.关键词
串联微电网/功率不平衡/自适应功率控制/梯形波补偿/过调制Key words
series microgrid/power imbalance/adaptive power control/ladder wave compensation/overmodulation分类
信息技术与安全科学引用本文复制引用
王兴贵,李昱,李锦键,丁颖杰,薛晟..基于梯形波补偿和功率自适应的HCSY-MG功率平衡控制策略[J].中国电机工程学报,2025,45(7):2645-2657,中插16,14.基金项目
国家自然科学基金项目(51967011) （51967011）
甘肃省工业过程先进控制重点实验室开放基金(2022KX08).Project Supported by National Natural Science Foundation Project(51967011) （2022KX08）
Gansu Province Key Laboratory of Advanced Control of Industrial Processes Open Fund(2022KX08). （2022KX08）
