Automatic adjusting method for a top gas pressure recovery turbine (TRT) excitation system before grid connection
A technology of residual pressure power generation and blast furnace gas, which is used in the control of generators, electrical program control, and program control in sequence/logic controllers through magnetic field changes. Problems such as automatic adjustment and control function of excitation system
Active Publication Date: 2009-12-16
XIAN SHAANGU POWER
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Problems solved by technology
Now, the domestic on -site manual operation mode is adopted in China, but with the continuous increase of industrial automation, the incompleteness of this technology has slowly appeared
Because it does not realize the automatic adjustment and control function of the inspirational system before griding the grid of the blast furnace gas residual pressure power generation device, the entire grid -connected process requires the technical personnel to judge according to the operating status of the on -site equipment. Realize the remote operation mode that is unattended at the scene
Moreover, since this mode of operation requires a special person to be responsible for the operation, the operating cost is relatively high
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[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0045] According to the above-mentioned technical scheme, the present invention comprises the following steps:
[0046] first step, see figure 1 , an excitation control system AVR is set between the generator GS for the blast furnace gas residual pressure power generation device and the programmable logic controller PLC or the distributed control system DCS, as the detection and adjustment unit of the excitation system of the generator. The excitation control system AVR is provided by the excitation manufacturer According to the requirements of national standards, the parameters are set independently into cabinets.
[0047] The second step, see figure 2 101KA for A / B channel selection, 102KA for excitation channel switching / returning, 103KA for manual / automatic excitation adjustment, 104KA for increasing magnetism, 105KA for demagnetizing, 106KA for consta...
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The invention discloses an automatic adjusting method for a top gas pressure recovery turbine (TRT) excitation system before grid connection. An excitation control system AVR is arranged between a TRT motor and a programmable logic controller (PLC) or a distributed control system (DCS); the on / off of a relay is controlled by a signal transmitted by the PLC or the DCS, and an excitation adjusting and controlling signal is transmitted to the excitation control system AVR; inner programming and logic linking are carried out by the PLC or the DCS according to the on / off signal of the externally input motor grid-connection vacuum breaker assisting junctions; and finally, the automatic adjusting and controlling function of a TRT excitation system before grid connection is finished by system programming. The invention realizes the functions of on-site unattended remote control grid-connection, improves the control technical content of the machine unit and reduces the operating cost for users.
Description
technical field [0001] The invention relates to the technical field of excitation system adjustment, in particular to an automatic adjustment method for the excitation system of a blast furnace gas residual pressure power generation device before grid connection. Background technique [0002] At present, no domestic manufacturer has realized the automatic adjustment and control function of the excitation system before the blast furnace gas residual pressure power generation device is connected to the grid on the blast furnace gas residual pressure power generation device. At present, the on-site manual operation mode of the excitation system is adopted in China, but with the continuous improvement of the degree of industrial automation, the incompleteness of this technology has gradually emerged. Because it does not realize the automatic adjustment and control function of the excitation system of the blast furnace gas residual pressure power generation device before grid con...
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IPC IPC(8): H02P9/14G05B19/05
Inventor 李勇周宁翟天奎
Owner XIAN SHAANGU POWER