Spare power automatic switching programmable logic control method for plant supply of power station

A technology for power plants and factory electricity, applied in the field of power systems, can solve the problems of high engineering implementation intensity, inflexible logic configuration, and high cost, and achieve the effects of saving engineering cost, great flexibility, and realizing transparency

Active Publication Date: 2011-06-15
BEIJING SIFANG JIBAO AUTOMATION +1
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Problems solved by technology

[0005] In order to solve the problems of high cost, high engineering implementation intensity, and inflexible logic configuration of the special standby automatic switching device in the prior art, the present invention provides a fieldbus communication technology to rea

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  • Spare power automatic switching programmable logic control method for plant supply of power station
  • Spare power automatic switching programmable logic control method for plant supply of power station
  • Spare power automatic switching programmable logic control method for plant supply of power station

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[0018] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Terminology used in this application:

[0019] Main control unit: refers to the communication control equipment in the middle layer of the electrical system of the power plant, which integrates the management of monitoring sub-stations and terminal equipment

[0020] Machine and communication management machine, process controller and many other functions in one

[0021] Parallel node communication: refers to the high-speed exchange of data between nodes at the same system level

[0022] figure 1 Schematic diagram of the logical steps for realizing the standby power supply of the power plant. The method realizes the automatic switching logic control of the power supply backup of the power plant in the main control unit of the power plant, and the method includes the following steps:

[0023] The main control...

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Abstract

The invention discloses a spare power automatic switching programmable logic control method for a plant supply of a power station based on a fieldbus communication technology. In the method, an electric spacing layer fieldbus network 1 for the power station is adopted; and a main control unit acquires data of a comprehensive protection device and a measurement and control device on a spacing layer bus, so the spare power automatic switching function of a station-service power supply can be realized in the main control unit. By the method, the limitation of the conventional spare power automatic switching device is broken through, and the conventional spare power automatic switching device is saved. The whole logical configuration is more intuitional by using the parallel node communication function; as the data global share and the data quality take participation in the logic, the whole logic configuration is more flexible and convenient; therefore, the flexibility and the usability of the system are enhanced. The method has obvious advantages in the aspects of flexibility of realizing the station-service power supply backup switchover logic and saving of equipment investment.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a method for realizing the automatic switch-on logic of power supply equipment in power plants. Background technique [0002] The self-switching function of the auxiliary power supply of the power plant occupies a very important position in the auxiliary power system of the thermal power plant. In the "Twenty-five Key Requirements for Preventing Major Accidents in Electric Power Production", it is clearly pointed out that it is necessary to prevent power outages in the whole plant to avoid serious consequences of unit loss of control and equipment damage. To prevent power outage accidents in the whole plant, it is particularly important to ensure that the logic function of the plant's power supply is automatically switched on. At the same time, according to the different wiring modes of different power plants and the different operating modes of each p...

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Application Information

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IPC IPC(8): H02J9/06
Inventor 楚彦君王海燕王寰
Owner BEIJING SIFANG JIBAO AUTOMATION
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