110kV快速限流装置对系统保护的影响研究

Research of 110 kV Fast Current Limiting Devices Impact on System Protection

故障限流器(Fault Current Limiter)作为限制短路电流的有效方式,以其优异的技术和经济特性成为国内外的研究热点,并广泛用于电力系统中,但是其接入系统后会对系统原有保护产生一定影响,是否需要调整保护定值等问题尚未明确。文中通过1台110 k V快速故障限流装置接入220 k V变压器中压侧的具体实例,基于PSCAD/EMTDC进行了仿真建模,通过计算分析了其对系统差动保护、零序保护以及相间距离保护的影响,计算结果表明,该110 k V快速限流装置的接入,对于原有保护几乎没有影响,无需调整保护定值。

As an effective method of limiting short-circuit current, fault current limiter is important in research be- cause of its excellent technical and economic characteristics,so it is widely used in electrical system. However, after its access to the system, it comes to the problem of influencing the original protection. The question of whether adjus- ting protection setting is unclear. This paper conducts a case study to make a 110 kV fast fault current limiting device access to a 220 kV transformer medium voltage side. Base on the simulation modeling PSCAD/EMTDC,this research calculates and analyzes the differential protection, zero sequence protection, distance protection system, and the in- fluence of the calculation. The result shows that the access of 110 kV fast current limiting device has almost no influ- ence on the original protection,so it is no need to adjust the protection setting.