基于微电网的双馈风机低电压穿越策略研究  

Research on Control Strategy to Improve Low Voltage Ride-Through Capability of Double Fed Induction Generator Based on Microgrid

作　　者：赵化峰[1] 郭权利[1] ZHAO Huafeng GUO Quanli(School of Electrical Engineering, Shenyang Institute of Engineering, Shenyang, Liaoning 110136, China)

机构地区：[1]沈阳工程学院电力学院,辽宁沈阳110136

出　　处：《东北电力技术》2017年第2期5-8,共4页Northeast Electric Power Technology

摘　　要：提出了一种基于微电网的风机动态无功发生策略,以提高双馈风力发电机的低电压穿越能力。策略包含风机网侧换流器、风机机侧换流器两部分。网侧换流器策略是令网侧换流器工作于STATCOM模式以达到为电网进行动态无功补偿的目的;机侧换流器策略是以恒功率因数模式向电网提供无功功率。试验结果表明,本策略可以在故障发生后使机端电压由110 V左右提升至300 V左右,并抑制直流母线电压的骤升,减小暂态过程对风机系统的危害,提高风机的低电压穿越能力。A strategy of dynamic reactive power is proposed which can improve low voltage ride-through capability of double fed induction generator. The strategy includes two parts which is grid-side converter control strategy of wind turbine and rotor-side converter control strategy of wind turbine. In grid-side converter control strategy,the grid-side converter works at STATCOM mode to compensate reactive power dynamically for power system. In rotor-side converter control strategy,the rotor-side converter provides reactive power to power system with constant power factor. The results show that the strategy improves the terminal voltage of wind turbines from 110 V to300 V and a sudden rise of DC bus voltage can be inhibited. This strategy decreases the damage of transient process to wind turbines and improves low voltage ride-through capability of double fed induction generator.

关 键 词：双馈风力发电机 动态无功发生策略 微电网 低电压穿越 

分 类 号：TM614[电气工程—电力系统及自动化]