摘要
采用EMTDC和BPA仿真工具,分析了动态无功设备对交流系统故障情况下直流逆变站母线电压和直流功率的影响。配置动态无功设备情况下故障后直流逆变站电压及功率恢复的时间加快,同一时刻直流逆变站电压及功率都比无动态无功设备情况下有所提高,且直流功率的增量与电压的增量基本呈比例关系。从有效抬高各逆变站的母线电压,改善直流功率的恢复特性,提高系统稳定性的角度出发,提出各母线对多回直流逆变站电压支撑强度的指标。该指标可以用于动态无功设备配置站点对多回直流支撑作用的敏感性分析。在该指标计算和系统稳定分析的基础上,提出了南方电网STATCOM的配置方案。该方案被采纳,相关工程已在2013年投产。
The influence of dynamic reactive power equipment on bus voltage and active power of inverter stations during AC system faults in China Southern Power Grid（ CSG） are analyzed with EMTDC and BPA simulation tools,When dynamic reactive power equipment is employed in the system,the fault recovery of bus voltage and active power of inverter stations will be accelerated,and at the same time the bus voltage and active power will be increased too. Moreover,the power increment is almost in proportion to the voltage increment. For the purpose of enhancing the fault recovery characteristic of inverter stations and the stability of the multi-infeed HVDC system,a voltage support strength factor for evaluating the influence of reactive power at different buses to inverter station voltages of the multi-infeed HVDC system is proposed. This factor can act as a sensitivity index for ranking the locations of dynamic reactive power equipments. Based on calculation of this index and stability analysis of the power system,a STATCOM allocation scheme is proposed for CSG. This scheme has been adopted,and the related projects has been put into production in 2013.
出处
《南方电网技术》
2014年第4期22-26,共5页
Southern Power System Technology
