摘要
现代工业园区中由电压暂降引起的电能质量问题日益突出。为了对电压暂降的传播机理进行深入的研究,本文首先对工业园区配电网中感应电机负荷因电压暂降引起的动态响应特征进行理论分析,建立等效电路和数学模型,分析感应电机负荷与电压暂降过程的交互作用。然后,对不同严重程度、不同短路故障原因、不同持续时间下的电压暂降,利用电力系统仿真软件进行分析验证。最后,考虑在不同的配网结构及转动惯量参数条件下,感应电机负荷对电压暂降的影响。仿真表明,感应电机负荷有抗拒电压幅值突变的特性,其转动惯量参数是造成这一特性的主要原因,并且这一特性的影响会随电压暂降在配网中传播。
In modern industrial parks,power quality issues caused by voltage sag are becoming increasingly serious. To explore the transmission mechanism of voltage sag,the dynamic response characteristics of induction motor load caused by voltage sag in the distribution network for industrial park is theoretically analyzed at first. The equivalent circuit and mathematical model are established,and the interactions between induction motor load and voltage sag are also analyzed. Then,a power system simulation software is used to analyze and verify the voltage sags of different degrees of severity,different short-circuit fault causes,and different durations. Finally,the influences of induction motor load on voltage sag are considered under the condition of different distribution network structures and different moments of inertia. Simulation results show that the induction motor load has the characteristic of resistance to voltage amplitude mutation,which is primarily caused by the parameter of moment of inertia. In addition,the effect of this characteristic will propagate in the distribution network along with voltage sag.
作者
冯澎湃
肖楚鹏
郭松
张靖
丁凯
胡畔
FENG Pengpai;XIAO Chupeng;GUO Song;ZHANG Jing;DING Kai;HU Pan(NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 210000,China;State Grid Electric Power Research Institute(Wuhan)Efficiency Evaluation Company Limited,Wuhan 430074,China;National Electric Power Conversion and Control Engineering Technology Research Center,Hunan University,Changsha 410082,China;Electric Power Research Institute,State Grid Hubei Electric Power Co.,Ltd,Wuhan 430077,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2020年第7期73-79,94,共8页
Proceedings of the CSU-EPSA
基金
国家电网公司总部科技基金资助项目(52153218000B)。
关键词
电压暂降
感应电机负荷
电能质量
电磁暂态分析
voltage sag
induction motor load
power quality
electromagnetic transient analysis
