10kV配网合环转电计算模型与试验分析

Electromagnetic loop closing calculation model and experimental analysis on 10 kV distribution network

电磁合环可提高地区电网供电可靠性,但由于合环时存在的风险,合环操作的影响因素及可能引起的安全问题没有进行过现场试验论证。根据广州番禺区局同一220kV片网和不同220kV片网之间的10kV馈线合环现场实验,建立了合环等值模型,进行潮流计算,分析了试验数据,具体研究电磁合环对电网运行的影响。结果表明外网等值、电压、负荷等是影响合环安全的重要因素。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。

It improves the reliability of power supply in regional power network by electromagnetic loop closing operation. Because of the risk, its influencing factors and security problems are not proved by field test. By the field test on taking loop closing operation on feeder line in Panyu in Guangzhou 10 kV distribution network, this paper establishes its equivalent model, calculates power flow, analyzes test results, and does specific study on the effect to the power network operation by electromagnetic loop closing operation. The results show that external network equivalence, voltage and line load are important factors on safety of loop closing operation. This paper has importance to reducing the power network operation risk and improving the reliability of power supply.