CAJ | 학술논문

为了保证重要用户的不间断供电，提高城市配电网的供电可靠性,10 kV线路通常涉及合环操作，但由于线路的负荷合环开关两侧存在电压差相角差等原因，易导致合环操作失败。文章结合实例，采用电压向量图对百色电网六塘变和龙旺变10kV线路合环操作失败原因进行分析，得出龙旺变变压器高压侧35kV相序与电网相序不一致的结论。最终，经过调相实现了线路合环，这对降低合环操作的电网风险和提高供电可靠性具有重要意义。
위료보증중요용호적불간단공전，제고성시배전망적공전가고성,10 kV선로통상섭급합배조작，단유우선로적부하합배개관량측존재전압차상각차등원인，역도치합배조작실패。문장결합실례，채용전압향량도대백색전망륙당변화룡왕변10kV선로합배조작실패원인진행분석，득출룡왕변변압기고압측35kV상서여전망상서불일치적결론。최종，경과조상실현료선로합배，저대강저합배조작적전망풍험화제고공전가고성구유중요의의。
In order to guarantee the uninterrupted power supply of the important consumers and increase the reliability of urban power grid, we usually uses closed loop operation in10 kV lines. However,the operation may fail due to the differences of voltages and phases between the two sides of the closed-loop switches in line loads.Combined with the example, the failure reason of Baise grid Liutang substation distribution and Longwang substation 10kV lines’ closing loop operation is analyzed in this paper ,by voltage vector diagram. And coming to a conclusion that in the high voltage side of 35kV Long Wong substation the phase of sequence is inconsistent with the grid phase sequence. Finally, it was succeeded in operating the closed-loop by phase modulation,which plays an important role in reducing the grid risk during closed-loop operation and improving the reliability of power supply.