风储系统风电功率平抑与故障穿越的新型复合功率控制策略
摘要：为解决风电机组在风电功率平抑和故障穿越2方面的不足，针对基于混合储能的直驱风力发电系统，提出一种同时兼顾风电功率平抑和故障穿越的复合功率控制策略。一方面，提出具有功率误差反馈环的改进型二阶滤波功率分配方法，实时修正超级电容和蓄电池储能的功率响应指令，提高目标功率分配精度的同时改善跟踪控制效果，实现风电功率平抑的同时延长储能介质使用寿命；另一方面，提出网侧变流器（grid side convertor，GSC）和混合储能共同作用的复合功率控制策略，实时修正各控制量的功率响应指令并快速清除直流母线上的冗余功率，提高风电机组的故障穿越能力，使风电系统基本不受电网故障的影响。
Abstract:To remedy the shortage of wind turbine in wind power leveling and fault ride-through, in allusion to direct drive wind power generation system based on hybrid energy storage a compound power control strategy, which considered both wind power leveling and fault ride-through simultaneously, was proposed. On the one hand, an improved second-order filtered power allocation method with power error feedback loop was proposed to realtime revise the power response command of super capacitor and battery storage to increase the target power allocation accuracy meanwhile the tracking control effect could be improved, thus the wind power leveling was realized at the same time the service life of energy storage medium was prolonged. On the other hand, a compound power control strategy, in which the grid side convertor acted together with hybrid energy storage, was put forward to realtime revise the power response command of each control quantity and quickly remove the redundant power of the DC bus, so that the fault ride-through capability of wind turbines was improved to make the wind power system basically not affected by grid faults.
标题：风储系统风电功率平抑与故障穿越的新型复合功率控制策略
英文标题：A New Composite Power Control Strategy for Wind Power Stabilization and Fault Ride-through of Wind Storage System
