With an increasing penetration of wind power in the modern electrical grid, the increasing replacement of large conventional synchronous generators by wind power plants will potentially result in deteriorated frequenc...With an increasing penetration of wind power in the modern electrical grid, the increasing replacement of large conventional synchronous generators by wind power plants will potentially result in deteriorated frequency regulation performance due to the reduced system inertia and primary frequency response. A series of challenging issues arise from the aspects of power system planning,operation, control and protection. Therefore, it is valuable to develop variable speed wind turbines(VSWTs) equipped with frequency regulation capabilities that allow them to effectively participate in addressing severe frequency contingencies. This paper provides a comprehensive surveyon frequency regulation methods for VSWTs. It fully describes the concepts, principles and control strategies of prevailing frequency controls of VSWTs, including future development trends. It concludes with a performance comparison of frequency regulation by the four main types of wind power plants.展开更多
云南电网是一个典型的高比例水电大规模直流送出系统,运行中多次发生自动发电控制(automaticgeneration control,AGC)过程不稳定导致的频率振荡现象。结合云南电网实际,建立包含AGC控制环节的频率稳定性分段线性化分析模型,通过特征值...云南电网是一个典型的高比例水电大规模直流送出系统,运行中多次发生自动发电控制(automaticgeneration control,AGC)过程不稳定导致的频率振荡现象。结合云南电网实际,建立包含AGC控制环节的频率稳定性分段线性化分析模型,通过特征值分析方法研究云南电网运行方式变化对系统小干扰稳定性的影响,揭示在水电机组一次调频死区以内AGC系统超调是引起云南电网分钟级频率振荡的原因。提出高比例水电系统AGC频率偏差系数的整定方法,通过设置次紧急区区域控制偏差(area control error,ACE)反向抑制策略和紧急区恒定频率控制(flatfrequencycontrol,FFC)切换策略,兼顾小干扰下的稳定性以及大扰动下的速动性。研究成果已在云南电网实际运行中验证,云南电网频率合格率显著提高。展开更多
基金supported in part by the National Natural Science Foundation of China (Nos.61428301,61433004 and 61627809)
文摘With an increasing penetration of wind power in the modern electrical grid, the increasing replacement of large conventional synchronous generators by wind power plants will potentially result in deteriorated frequency regulation performance due to the reduced system inertia and primary frequency response. A series of challenging issues arise from the aspects of power system planning,operation, control and protection. Therefore, it is valuable to develop variable speed wind turbines(VSWTs) equipped with frequency regulation capabilities that allow them to effectively participate in addressing severe frequency contingencies. This paper provides a comprehensive surveyon frequency regulation methods for VSWTs. It fully describes the concepts, principles and control strategies of prevailing frequency controls of VSWTs, including future development trends. It concludes with a performance comparison of frequency regulation by the four main types of wind power plants.
文摘云南电网是一个典型的高比例水电大规模直流送出系统,运行中多次发生自动发电控制(automaticgeneration control,AGC)过程不稳定导致的频率振荡现象。结合云南电网实际,建立包含AGC控制环节的频率稳定性分段线性化分析模型,通过特征值分析方法研究云南电网运行方式变化对系统小干扰稳定性的影响,揭示在水电机组一次调频死区以内AGC系统超调是引起云南电网分钟级频率振荡的原因。提出高比例水电系统AGC频率偏差系数的整定方法,通过设置次紧急区区域控制偏差(area control error,ACE)反向抑制策略和紧急区恒定频率控制(flatfrequencycontrol,FFC)切换策略,兼顾小干扰下的稳定性以及大扰动下的速动性。研究成果已在云南电网实际运行中验证,云南电网频率合格率显著提高。
