110 kV voltage class pentagonal wiring hydropower station black-start test system and method

The invention discloses a 110 kV voltage class pentagonal wiring hydropower station black-start test system and method, wherein the110 kV system is of a pentagonal wiring structure; after power loss of a sending-out line is simulated, a 400V factory bus power supply incoming line switch of a black-start test unit is disconnected, a standby power supply automatic switching system automatically switches on an interconnection switch, the 400V factory bus power supply of the black-start test unit recovers power supply, a diesel generating set is started, voltage is built to rated voltage, the 400Vinterconnection switch is disconnected, and the diesel generator supplies power to recover the plant load of the black-start test unit. A hydraulic turbine set is started, the generator with a main transformer is boosted to rated voltage from zero, an outlet switch of the diesel generator is switched off, a station service power supply switch is switched on, self power supply of the hydraulic turbine generator is recover