CAJ | 학술논문

随着电网规模和容量的明显提升,电网短路电流水平不断提高,高一级电压等级出现后,次一级电网短路电流又会明显增大,这对电网规划提出了更高的技术和经济要求.在分析电网负荷、接地支路和变压器变比等不同元件以及不同调压方式等因素对短路电流影响程度的基础上,针对某地区实际750 kV电网布局,考虑不同因素对短路电流的影响程度,提出基于运行方式调整和故障电流限制器等不同手段相结合的短路电流抑制措施,并通过仿真计算来检验措施的正确性和有效性.仿真结果表明,影响短路电流水平的因素较多,限制短路电流的措施需综合考虑,不能片面考虑.
수착전망규모화용량적명현제승,전망단로전류수평불단제고,고일급전압등급출현후,차일급전망단로전류우회명현증대,저대전망규화제출료경고적기술화경제요구.재분석전망부하、접지지로화변압기변비등불동원건이급불동조압방식등인소대단로전류영향정도적기출상,침대모지구실제750 kV전망포국,고필불동인소대단로전류적영향정도,제출기우운행방식조정화고장전류한제기등불동수단상결합적단로전류억제조시,병통과방진계산래검험조시적정학성화유효성.방진결과표명,영향단로전류수평적인소교다,한제단로전류적조시수종합고필,불능편면고필.
@@@@With the significant improvement of the scale and capacity of power grid , the level of short-circuit current improves continuously.The lower grid would have a much lager short -circuit current after a higher voltage level occurs , so it sets a higher technical and economic requirement to the planning of power grid .The different elements such as grid load , grounding branches and transformation ratio etc .are analyzed as well as the influence of different voltage -regulating modes on short -circuit current.On this basis, aiming at the overall arrangement of an actual 750 kV grid and considering the influences of dif-ferent factors on short -circuit current, the measures against short -circuit current are proposed based on the combination of operation mode adjustment and fault current limiter , whose validity and availability are verified by the simulation and calcula-tion.The simulation results show that the influence factors of short -circuit current level must be considered comprehensively .