Automatic adjusting method for a top gas pressure recovery turbine (TRT) excitation system after grid connection
A technology of residual pressure power generation and blast furnace gas, which is applied in the direction of controlling the generator through the change of the magnetic field, can solve the problems of inability to realize the remote operation mode and high operating costs, and achieve the effect of satisfying the automatic adjustment function of the remote control excitation system
Active Publication Date: 2011-10-05
XIAN SHAANGU POWER
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Problems solved by technology
[0002] At present, no manufacturer at home and abroad has realized the automatic adjustment and control function of the excitation system after the blast furnace gas residual pressure power generation device is connected to the grid on the blast furnace gas residual pressure power generation device. Now, the field manual operation mode of the excitation system is adopted in China, but with the industrial With the continuous improvement of the degree of automation, the incompleteness of this technology has gradually emerged. After grid connection, technicians are still required to manually adjust the excitation system under suitable conditions according to the operating status of the field equipment. After the manual operation of magnetization or demagnetization is completed, the appropriate working conditions are manually selected, and the excitation system is manually switched from the "constant voltage" mode to the "constant power factor" or "constant reactive power" mode, which cannot realize unattended on-site Remote operation mode, therefore, this operation mode requires a special person to be responsible, and the operating cost is relatively high
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[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0019] first step, see figure 1 , an excitation control system AVR4 is set between the generator GS1 for the blast furnace gas residual pressure power generation device and the programmable controller PLC2 or the distributed control system DCS3, as the detection and adjustment unit of the excitation system of the generator. The excitation control system AVR4 is controlled by the excitation The manufacturer sets the parameters according to the requirements of the national standard, and makes the cabinet independently.
[0020] The second step, see figure 2 , set up A / B channel selection relay 101KA, excitation channel switching / deactivation relay 102KA, manual / automatic excitation adjustment relay 103KA, magnetization increase relay 104KA, demagnetization relay 105KA, constant Power factor control relay 106KA and constant reactive power control relay 107KA;...
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The invention discloses an automatic adjusting method for a top gas pressure recovery turbine (TRT) excitation system after 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 the TRT excitation system after grid connection is finished by system programming. The invention realizes programmable operation modes, satisfies on-site unattended remote control of the automatic adjusting function of an excitation system, and fills the gap in the technical field at home and abroad.
Description
technical field [0001] The invention relates to an automatic adjustment method of an excitation system, in particular to an automatic adjustment method for an excitation system after a blast furnace gas residual pressure power generation device is connected to the grid. Background technique [0002] At present, no manufacturer at home and abroad has realized the automatic adjustment and control function of the excitation system after the blast furnace gas residual pressure power generation device is connected to the grid on the blast furnace gas residual pressure power generation device. Now, the field manual operation mode of the excitation system is adopted in China, but with the industrial With the continuous improvement of the degree of automation, the incompleteness of this technology has gradually emerged. After grid connection, technicians are still required to manually adjust the excitation system under suitable conditions according to the operating status of the fiel...
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IPC IPC(8): H02P9/14
Inventor 李勇周宁王航
Owner XIAN SHAANGU POWER