CAJ | 학술논문

输电线路瞬时人工接地短路试验是直流输电工程调试的关键试验步骤。介绍了在南方电网多个直流工程中开展的输电线路瞬时人工接地短路试验方法,并采用CDEGS软件仿真计算入地短路电流、短路点土壤电阻率等参数对短路点区域地表跨步电压的影响及分布。仿真结果显示：在入地短路电流为10 kA,短路点场区土壤电阻率为1500Ω·m,散流杆塔接地装置采用山区典型放射状结构时,距离杆塔底座水平距离30 m的试验区域跨步电压最大值超过安全限值,存在试验安全风险,需进一步提高并校核试验安全距离。
수전선로순시인공접지단로시험시직류수전공정조시적관건시험보취。개소료재남방전망다개직류공정중개전적수전선로순시인공접지단로시험방법,병채용CDEGS연건방진계산입지단로전류、단로점토양전조솔등삼수대단로점구역지표과보전압적영향급분포。방진결과현시：재입지단로전류위10 kA,단로점장구토양전조솔위1500Ω·m,산류간탑접지장치채용산구전형방사상결구시,거리간탑저좌수평거리30 m적시험구역과보전압최대치초과안전한치,존재시험안전풍험,수진일보제고병교핵시험안전거리。
Manual instantaneous grounding test of transmission lines is a key procedure in HVDC project commissioning. This paper describes the manual instantaneous grounding test method of transmission lines applied to multiple HVDC projects of CSG, and simu-lates the influence of grounding current and soil resistivity on regional step voltage using CDEGS software. Simulation results show that when the grounding current is 10 kA, the soil resistivity of the short circuit area is 1 500 Ω·m, and the grounding device of current divergence tower is typically radial, the maximum step voltage of the test field within 30 m horizontal distants away from the tower base will exceed the safe limit, then the safe distant should be improved to reduce the test risk.