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对高压配电进行综合保护设计时,需要考虑灵敏性和速动性,还要考虑选择性和可靠性,所以三段式电流保护(电流速断保护、限时电流速断保护和过电流保护)需要合理配置,最大限度地发挥保护作用。我公司就曾因高压配电综合保护设计不当,发生因矿山10kV线路出现故障致使整个生产线停产的事故。1供配电回路我公司供配电回路布置见图1。其中,110kV变电站有2台110/10kV变压器,10kV出线有10个回路,发电联络线有2个回路,合计12个回路。每一条出线端均连接有10kV配电站。
The comprehensive protection of high-voltage power distribution design, you need to consider the sensitivity and speed, but also consider the selectivity and reliability, so the three-stage current protection (current quick-break protection, current limit protection and over-current instantaneous current protection) needs to be reasonable Configuration, to maximize the protection. Our company once due to improper design of high-voltage power distribution integrated protection, occurred due to the mine 10kV line failure resulting in the shutdown of the entire production line accidents. 1 for the distribution circuit I supply circuit layout shown in Figure 1. Among them, the 110kV transformer substation has two 110 / 10kV transformers, 10kV outlet has 10 loops, power generation tie line has 2 loops, a total of 12 loops. Each outlet is connected to a 10kV distribution station.