Diesel generator standby system based on power plant molten salt heat storage
A diesel generator and backup system technology, which is applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as failure to start, failure of the unit to stop normally, equipment damage, etc., to reduce reliability, improve safety, and ensure The effect of normal operation
Pending Publication Date: 2021-12-31
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology
[0004] With this connection system, when the unit has an emergency failure and loses power, if the diesel generator cannot be started due to maintenance or failure, the key equipment on the security section will not be able to start, resulting in the failure of the unit to stop normally and equipment damage
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[0025] The present invention will be further described below in conjunction with the accompanying drawings.
[0026] Such as figure 2 As shown, a kind of diesel generator backup system based on molten salt heat storage in power plants provided by the present invention includes a 500kV high-voltage busbar 1, a main transformer 2, a generator 3, a high-voltage utility transformer 4, and a 6kV utility busbar 5, Boiler transformer 6, boiler PC section 7, security PC section 8, diesel generator 9, small generator 10, small steam turbine 11, molten salt heat storage transformer 12, electric heater 13, high temperature tank 14, low temperature tank 15, heat exchange 16; wherein, the outlet of the generator 3 is connected with the main transformer 2 and the high-voltage industrial transformer 4, the main transformer 2 is connected with the 500kV high-voltage bus 1 through the first switch 101, and the high-voltage industrial transformer 4 is connected with the 6kV industrial transfor...
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The invention discloses a diesel generator standby system based on power plant molten salt heat storage. The diesel generator standby system comprises a 500 kV high-voltage bus, a main transformer, a generator, a high-voltage station transformer, a 6 kV station power bus, a boiler transformer, a boiler PC section, a security PC section, a diesel generator, a small generator, a small turbine, a molten salt heat storage transformer, an electric heater, a high-temperature tank, a low-temperature tank and a heat exchanger. According to the diesel generator standby system based on power plant molten salt heat storage, the set of small turbine generator is newly connected to the security section, air is extracted from an industrial steam supply inlet in the molten salt heat storage system to drive the small turbine, the small steam turbine generator can serve as a standby power source of the diesel generator, when a generator set breaks down and loses station service and the security section cannot supply electricity, if the diesel generator fails in fault maintenance or starting, emergency power supply can be provided for the security section through a molten salt heat storage system and the small turbine generator, normal operation of key loads of a power station is ensured, a unit can be shut down safely, and the safety of the system is improved.
Description
technical field [0001] The invention belongs to the field of molten salt heat storage in power plants, and in particular relates to a backup system for diesel generators based on molten salt heat storage in power plants. Background technique [0002] Combined heat and power units have inherent advantages in the cascade utilization of energy, which can greatly improve the thermal efficiency of coal-fired thermal power units and reduce the total amount of pollutant emissions. It is one of the most stable, reliable and efficient heat sources for heating in winter. One of the ideal heat sources to replace small coal-fired industrial boilers. However, the combined heat and power unit itself also exhibits strong thermoelectric coupling characteristics, and it is often impossible to further reduce the power load due to the demand for heat supply during the low power load period of the grid. During the high-load period of the power grid, due to the demand for heat supply, it cannot...
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IPC IPC(8): F01K13/02F01K13/00F01D25/34F01D15/10F02B63/04F02B77/00
CPCF01K13/00F01K13/02F01D15/10F01D25/34F02B63/04F02B77/00
Inventor 高峰兀鹏越孙钢虎柴琦王小辉寇水潮杨沛豪张立松孙梦瑶赵俊博
Owner XIAN THERMAL POWER RES INST CO LTD