When disconnected with externalpowergrid due to certain fault, it will result in frequency collapse, and even leads to large-scale blackout owing to the active power imbalance.
When enterprise power supply system becomes isolated after fault occurred, the best method is finding a suitable grid-connected point to connect with externalpowergrid to maintain stable.
大型工业企业供电网的部分电力负荷由自备电厂供应，外部电网构成了企业供电系统的可靠后备。
3
The more complex external environment the grid construction facing, the more prominent external environment risks the external environment of powergrid construction producing.