This paper describes the study analysis performed to evaluate the available and potential solutions to control the highly increasing short circuit （SC） levels in Kuwait power system. The real Kuwait High Voltage （H...This paper describes the study analysis performed to evaluate the available and potential solutions to control the highly increasing short circuit （SC） levels in Kuwait power system. The real Kuwait High Voltage （HV） network was simulated to examine different measures at both 275 kV and 132 kV stations. The simulation results show that the short circuit currents exceed the permissible levels （40 kA in the 132 kV network and 63 kA in the 275 kV network） in some specific points. The examined measures include the a study on changing the neutral point policy, changing some lines from alternating current （AC） to direct current （DC）, dividing specific bus bars in some generating stations and applying current limiters. The paper also presents a new plan for the transmission network in order to manage the expected increase in short circuit levels in the future.展开更多
高比例新能源接入电网的间歇性和波动性对系统稳定性有显著影响。因此,评估和提升含高比例可再生能源(Renewable Energy Source, RES)的配电网稳定性至关重要。文中提出了一种新的系统强度评估指标——集成短路比(Integrated Short Circ...高比例新能源接入电网的间歇性和波动性对系统稳定性有显著影响。因此,评估和提升含高比例可再生能源(Renewable Energy Source, RES)的配电网稳定性至关重要。文中提出了一种新的系统强度评估指标——集成短路比(Integrated Short Circuit Ratio, ISCR),该指标不仅考虑了RES之间的相互作用,还考虑了储能设备(Energy Storage Device, ESD)的影响,能更准确地辨识电网薄弱环节。另外,基于ISCR提出了通过双层优化方法调配RES和ESD的位置和容量的配电网稳定性提升方法,以增强系统强度并提高RES和ESD容量。在上层,对RES的位置和容量进行优化,确保节点处的ISCR值最大;在下层,对ESD的位置和容量进行优化,确保ISCR值高于临界短路比(Critical Short Circuit Ratio, CSCR),以保持系统强大。位置优化由节点处的ISCR值确定。容量优化采用线性规划方法求解。最后,案例研究验证了所提优化方法在保持系统强度的同时增加RES和ESD容量的有效性。展开更多
文摘This paper describes the study analysis performed to evaluate the available and potential solutions to control the highly increasing short circuit （SC） levels in Kuwait power system. The real Kuwait High Voltage （HV） network was simulated to examine different measures at both 275 kV and 132 kV stations. The simulation results show that the short circuit currents exceed the permissible levels （40 kA in the 132 kV network and 63 kA in the 275 kV network） in some specific points. The examined measures include the a study on changing the neutral point policy, changing some lines from alternating current （AC） to direct current （DC）, dividing specific bus bars in some generating stations and applying current limiters. The paper also presents a new plan for the transmission network in order to manage the expected increase in short circuit levels in the future.
文摘高比例新能源接入电网的间歇性和波动性对系统稳定性有显著影响。因此,评估和提升含高比例可再生能源(Renewable Energy Source, RES)的配电网稳定性至关重要。文中提出了一种新的系统强度评估指标——集成短路比(Integrated Short Circuit Ratio, ISCR),该指标不仅考虑了RES之间的相互作用,还考虑了储能设备(Energy Storage Device, ESD)的影响,能更准确地辨识电网薄弱环节。另外,基于ISCR提出了通过双层优化方法调配RES和ESD的位置和容量的配电网稳定性提升方法,以增强系统强度并提高RES和ESD容量。在上层,对RES的位置和容量进行优化,确保节点处的ISCR值最大;在下层,对ESD的位置和容量进行优化,确保ISCR值高于临界短路比(Critical Short Circuit Ratio, CSCR),以保持系统强大。位置优化由节点处的ISCR值确定。容量优化采用线性规划方法求解。最后,案例研究验证了所提优化方法在保持系统强度的同时增加RES和ESD容量的有效性。
