双馈风电机组高电压穿越协调控制策略

A Coordinated Control Strategy for High Voltage Ride-through of Doubly-fed Induction Generator

针对传统高电压穿越技术存在的不足,提出了一种在发电机组定子侧串联电抗、直流侧增加卸荷电路、网侧变流器无功控制的高电压穿越协调控制策略,实现了在提高双馈风电系统高电压穿越能力的同时减少风电场无功设备投资成本的目标。以某双馈风电场并网方案为例,构建仿真模型,验证了提出的控制策略在提高双馈风电场的高电压穿越能力及高电压穿越结束后系统运行稳定性方面的可行性和优越性。

Aiming at the defects of traditional HVRT technology,the paper proposes a coordinated control strategy for HVRT in which there are series reactors at generator stator side,chopper circuit at DC side and transformation reactive control at grid side.The goals that improve HVRT capability and lower investment of wind farm reactive power compensation device are achieved.Taking an integration plan of a doubly-fed wind farm as an example,the paper establishes simulation model and verifies the feasibility and superiority of the proposed HVRT scheme on improving HVRT capability of wind farm and stability after HVRT.