摘要
介绍利用实时仿真装置对东北伊冯 50 0 k V系统可控串补中限压器 (MOV)工作方式的试验研究。试验包括故障和系统的暂态稳定控制。通过试验检验了以离线计算为基础的设计参数 ,对控制保护方式重新进行了分析研究。试验表明 ,当采用晶闸管旁路方法的保护限压器时 ,从实际控制器发出旁路命令到限压器能量停止上升需时 5ms,长于数字计算得出的 1～ 1 .5ms。在暂态稳定试验中发现 ,即使在暂稳极限范围内 ,故障切除后 ,目前设计的限压器仍可能动作 ,影响稳定控制。文章分析了原设计的旁路控制不够可靠等缺点。根据试验研究结果 ,建议将伊冯可控串补限压器的保护水平由 2 .2 pu提高到 2 .4pu,允许能耗为 2 0
A real time simulation study on the operation mode of TCSC varistor (MOV) in Yiming Fengtun 500kV system is presented in this paper. The study includes fault applying and transient stability controlling. The designed MOV parameters obtained from off line analysis are examined. The protection control modes are reviewed and studied. The study shows that using thyristor bypass to prevent MOV from overload may cause a 5 ms time delay which is longer than that obtained by off line analysis. It also shows that after fault clearing, even the system power flow is below the transient stability limits, the designed MOV can have unwanted conduction and may affect stability control adversely. In this paper, some disadvantages, such as being unreliable, of the original thyristor bypass design are pointed out. From the study, the protective level of Yiming Fengtun TCSC's MOV is suggested to be 2.4 pu instead of 2.2 pu and the allowable energy dissipation of MOV is 20 MJ.
出处
《电网技术》
EI
CSCD
北大核心
2000年第11期23-27,共5页
Power System Technology
基金
国家自然科学基金资助项目! ( 596370 50 )
电力工业部资助项目
东北电力集团公司资助项目
