摘要
针对柔性输配电装置(FACTs)普遍存在的过载与抗冲击能力弱的问题,提出了"韧性电力系统"的概念,结合该概念,提出并研究了限流式UPFC"柔性"和"坚强性"两方面特性:采用PSCAD/EMTDC建模仿真的方法,验证了限流式UPFC在正常运行时与常规UPFC一样,能够实现对输电线路潮流等的柔性控制与灵活调节;在电网短路时,限流式UPFC中的限流器模块能够迅速抑制系统短路故障电流,同时可有效保护UPFC装置,使其免受短路电流的冲击而损毁。研究结果表明,限流式UPFC的特点符合韧性电力系统的特征,是实现韧性电力系统的一种新颖且功能强大的装置。
Aiming at the problem that flexible alternating current transmission devices （FACTs） are generally vulnerable against overload or fault operation, the concept of resilient power system was proposed. Considering the requirement of resilient power system, the characteristics of unified power flow controller with fauh current limit （UPFC-FCL） was proposed and researched. While operating normally, UPFC-FCL were able to obtain soft control, such as adjust line flow, easily as general UPFC. Under fault operating circumstances, the fault current limiter within UPFC-FCL will limit the system fault current to protect the device from overcurrent. Study results demonstrate that UPFC-FCL is a novel and powerful device which matches the requirement of resilient power system.
出处
《机电工程》
CAS
2015年第5期660-665,共6页
Journal of Mechanical & Electrical Engineering
关键词
韧性电力系统
短路电流
冲击
统一潮流控制器
resilient power system
fault current
impact
unified power flow controller （UPFC）
