Power supply system of industrial water pump of thermal power plant
A technology for thermal power plants and industrial water pumps, which is applied in pump control, machine/engine, liquid variable capacity machinery, etc. It can solve problems such as power failure of the main power supply, power failure of three industrial water pumps, and outage of industrial water pumps. Guarantee reliability, reduce overall investment and workload of subsequent equipment maintenance, and improve flexibility
Active Publication Date: 2017-10-20
深圳市深汕特别合作区华润电力有限公司
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Problems solved by technology
[0002] Industrial water pumps play a pivotal role in the operating equipment of the whole plant. Once the industrial water pumps cannot supply water normally, it will seriously affect the normal operation and start-up and shutdown of the two units.
[0003] The current power supply methods commonly used in power plants are as follows: figure 1 As shown, it can be seen that the 400V chemical water PC section A and the 400V chemical water PC section B pass through the dual power supply switching cabinet, and the 400V chemical water PC section A and the 400V chemical water PC section B are two independent power supplies, which can be respectively The power supply for three pumps is taken from the same frequency conversion control cabinet. During the operation, the following situations will occur, which will affect the normal operation of industrial water pumps: First, the main power supply of the dual power supply automatic switching cabinet loses power , the dual power supply switch cannot be switched successfully, which will cause power loss of three industrial water pumps; second, any section of the 400V chemical water PC section is overhauled, and the power switch of the other PC section industrial water pump trips, which will cause power loss of three industrial water pumps ; Third, the frequency converter in the control cabinet is faulty, and the three industrial water pumps can only be switched to power frequency operation. If the frequency converter needs to be removed and replaced, and the control cabinet needs to be powered off for maintenance, the three industrial water pumps will be out of service; fourth, the control The circuit breaker, contactor, auxiliary contact, and relay in the cabinet are damaged and replaced. If the cabinet is powered on for maintenance, there will be a risk of electric shock, and the maintenance of the power failure will cause the industrial water pump to stop operating for three days; Fifth, the control power supply fuse in the control cabinet is blown or the control power supply Module failure will cause three industrial water pumps to stop operating
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[0013] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0014] Such as figure 2 The power supply system for an industrial water pump in a thermal power plant includes a first 400V chemical water PC 1, a second 400V chemical water PC 2, a first pump 3, a second pump 4, and a third pump 5. The first One outlet end of a 400V chemical water PC 1 is electrically connected to the incoming line end of the first control cabinet 6, and the outlet end of the first control cabinet 6 is electrically connected to the first pump 3, and the first 400V chemical water PC 1 The other outlet end of the second 400V chemical water PC 2 and one outlet end of the second 400V chemical water PC 2 are respectively electrically connected to...
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The invention relates to a power supply system of an industrial water pump of a thermal power plant. The power supply system comprises a first 400V chemical water PC, a second 400V chemical water PC, a first pump, a second pump and a third pump. One wire outlet end of the first 400V chemical water PC is electrically connected with the wire inlet end of a first control cabinet. The wire outlet end of the first control cabinet is electrically connected with the first pump. The other wire outlet end of the first 400V chemical water PC and one wire outlet end of the second 400V chemical water PC are electrically connected with the two wire inlet ends of a dual-power switching cabinet correspondingly. The wire outlet end of the dual-power switching cabinet is electrically connected with the wire inlet end of a second control cabinet. The second control cabinet is electrically connected with the second pump. The other wire outlet end of the second 400V chemical water PC is electrically connected with the third pump. The structure of the second pump control cabinet is the same as that of the first pump control cabinet.
Description
technical field [0001] The invention relates to the field of power supply, in particular to a power supply system for industrial water pumps. Background technique [0002] Industrial water pumps play a pivotal role in the operating equipment of the whole plant. Once the industrial water pumps cannot supply water normally, it will seriously affect the normal operation and start-up and shutdown of the two units. [0003] The current power supply methods commonly used in power plants are as follows: figure 1 As shown, it can be seen that the 400V chemical water PC section A and the 400V chemical water PC section B pass through the dual power supply switching cabinet, and the 400V chemical water PC section A and the 400V chemical water PC section B are two independent power supplies, which can be respectively The power supply for three pumps is taken from the same frequency conversion control cabinet. During the operation, the following situations will occur, which will aff...
Claims
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IPC IPC(8): F04B49/06
CPCF04B49/06
Inventor 王际华王峰刘英伦陈华黄正来吕季平秦岭
Owner 深圳市深汕特别合作区华润电力有限公司