基于旋转动能释放的风机一次调频策略优化  

Optimization of primary frequency regulation strategy of wind turbines based on rotational kinetic energy release

作　　者：高俊诚 郭剑波[1] 王铁柱[1] 马士聪[1] 罗魁[1] 侯玮琳 GAO Juncheng;GUO Jianbo;WANG Tiezhu;MA Shicong;LUO Kui;HOU Weilin(China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]中国电力科学研究院,北京100192

出　　处：《华中科技大学学报（自然科学版）》2024年第7期60-68,共9页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(U23B20122).

摘　　要：电力系统发生扰动后的频率动态响应过程中,针对不留取备用功率而只依靠转子动能释放提供短时频率支撑的风力发电机组,提出一种调频策略以接近最小化调频代价.分析了调频能量释放对频率响应的影响,使用状态转移矩阵推导量化了不同时刻能量释放对频率变化的作用;构建了基于聚合模型的调频能量短时释放的最优控制问题,从能量视角解析得到调频能量释放的最优轨迹;进一步考虑其实际实现方法,提出一种一次调频阶段风电机组短时频率支撑策略,将该策略应用于典型算例,验证了该辅助调频策略的有效性.结果表明:提出的调频策略能够在保证电网频率安全稳定的前提下,优化风电机组转子动能释放、降低风电机组调频代价,兼具可靠性与经济性.In the frequency dynamic response process following disturbances in the power system,a frequency regulation strategy was proposed with the aim of approaching the minimization of frequency regulation costs for wind turbine units that do not retain reserve power but rely solely on rotor kinetic energy release for short-term frequency support.An analysis of the impact of frequency regulation energy release strategy on frequency response was conducted,and the quantified effects of energy release at different time on frequency variations were derived by using a state transition matrix.An optimal control problem for short-term frequency regulation energy release based on an aggregate model was established,and the optimal trajectory of energy release was obtained through analysis from an energy perspective.Further considering practical implementation,a short-term frequency support strategy for wind turbines in the primary frequency regulation stage was proposed.This strategy was applied to a typical case to verify the effectiveness of the auxiliary frequency regulation strategy.The results demonstrate that the proposed frequency regulation strategy can optimize the release of kinetic energy from the wind turbine rotor and reduce the cost of frequency regulation,all while ensuring the security and stability of the grid frequency,and it combines reliability and cost-effectiveness.

关 键 词：风机转子动能释放 一次调频 调频能量 暂态频率稳定 最优控制 

分 类 号：TM712[电气工程—电力系统及自动化]