Security power supply system and control method thereof
A security power supply and power supply technology, applied in emergency power supply arrangements, electrical components, circuit devices, etc., can solve the problems affecting economic benefits, the unit cannot run, the rotor is bent, etc., and achieves a simple control system, low equipment costs, and reliable power supply. Effect
Inactive Publication Date: 2015-12-30
ANGANG STEEL CO LTD
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[0002] At present, many industrial enterprises are equipped with security power supply systems. The security power supply is the most important power supply for gas turbine generator sets. The system failure will stop the key equipment such as the cranking motor and lubricating oil pump of the unit. When the unit is in a hot state, the rotor will stop and the rotor will be bent. After the rotor is bent, it needs to be returned to the factory for treatment. Cannot operate, affecting economic benefits
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[0019] Depend on figure 1 It can be seen that the security bus power supply of the security power supply system of the present invention is composed of two normal power supplies of 1# power supply and 2# power supply and one diesel generator security power supply. for spare. A switch ZK1 is set between the 1# power supply and the security bus 1, a switch ZK2 is set between the 2# power supply and the security bus 1, an exit switch ZK3 is set between the security bus 1 and the diesel generator 2, and a voltage switch is set on the security bus Transformer PT; time relay KT1 for power failure delay trip is set at switch ZK1, and time relay KT2 is set at switch ZK2; at the same time, a generator start-stop blocking circuit is added to the diesel generator 2 start-stop circuit, including the switch QF, intermediate relay KA, button PB and voltage transformer PT secondary relay dry contact QD, the front and back of intermediate relay KA are respectively connected to switch QF and ...
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The invention provides a security power supply system and a control method thereof. The security power supply is formed by a 1# power supply, a 2# power supply, and a diesel generator security power supply, switches ZK1, ZK2, and ZK3 are respectively arranged between a security bus and the 1# power supply, the 2# power supply, and a diesel generator, a loop of the ZK1 and ZK2 is provided with a voltage transformer, time delays are arranged at the ZK1 and the ZK2, and a diesel generator start-stop loop is additionally provided. When power is supplied to the security bus by the ZK1, the voltage transformer is detected to be powered off, a spare power automatic switching device turns off the ZK1 in a time delay manner and turns on the ZK2, and the power supply is recovered. When the 1# power supply and the 2# power supply are both turned off, the spare power automatic switching device fails to operate, the time delays trip out, the voltage transformer is turned off, an intermediate relay is turned on, the diesel generator starts to operate and turn on the ZK3 when boosted to the rated voltage, and the power supply of the security bus is completed. When the 1# power supply or the 2# power supply recovers power delivery, the power supply of the diesel generator is stopped via a hand-operated button. According to the security power supply system and the control method thereof, reliable power supply of the security power supply in various fault conditions can be guaranteed, the damage to equipment is avoided, normal operation of the equipment is guaranteed, and gas leakage is prevented.
Description
technical field [0001] The invention belongs to the field of electrical control, in particular to a security power supply system capable of ensuring reliability of power supply and an automatic control method thereof. Background technique [0002] At present, many industrial enterprises are equipped with security power supply systems. The security power supply is the most important power supply for gas turbine generator sets. The system failure will stop the key equipment such as the cranking motor and lubricating oil pump of the unit. When the unit is in a hot state, the rotor will stop and the rotor will be bent. After the rotor is bent, it needs to be returned to the factory for treatment. Can not run, affecting economic benefits. Therefore, having an independent and reliable security power supply system is the prerequisite and necessary condition for all industrial enterprises to ensure the smooth progress of production. Contents of the invention [0003] The inventi...
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IPC IPC(8): H02J9/06
Inventor 詹守权
Owner ANGANG STEEL CO LTD