A remote control device for on-load switch of main transformer
A technology for remote control devices and main transformers, applied to measuring devices, instruments, and measuring electrical variables, etc., can solve problems such as long distances, time wasting, and repetitive work content, and achieve improved work efficiency, accuracy, and experimental operations. intuitive effect
Active Publication Date: 2016-02-03
STATE GRID CORP OF CHINA +2
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Problems solved by technology
The three tests of winding DC resistance, short-circuit impedance and on-load switch excessive waveform need to adjust the tap position more than 100 times, and the work content is repeated.
Due to the long distance between the position of the on-load switch and the test area, the environment is noisy when multi-professional and multi-team cross-working, which makes it more difficult for A and D to transmit information. A certain tap position; 2. When a party hears the wrong position, it will continue the test according to the wrong position, and it will not be discovered until the last tap is completed, thus wasting a lot of time
Method used
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[0013] Such as figure 1 As shown, a remote control device for the on-load switch of the main transformer includes a casing, and electrical components are arranged inside the casing. The power input terminal of the device is connected to a 380V power supply, and the power input terminal passes through the normally closed contact JC13 of the emergency stop relay. Divided into two routes, the first route is connected to the motor M after the normally open contact JC11 of the ascending sequence relay, and the second route is connected to the motor M after the normally open contact JC12 of the descending sequence relay, and the motor M is an asynchronous motor.
[0014] One end of the control line L1 is connected to the power bus between the normally closed contact JC13 and the normally open contact JC11 or connected to the power bus between the normally closed contact JC13 and the normally open contact JC12, and the other end of the control line L1 is passed through The wires are ...
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The invention discloses a remote control device for a main transformer load switch, and relates to the technical field of electric power circuit maintenance devices. The device is characterized in that a power supply input terminal is divided into two paths after the power supply input terminal passes through normally closed contacts JC13 of a stop relay, the first path is connected with a motor M after the first path passes through normally open contacts JC11 of an ascending relay, the second path is connected with the motor M after the second path passes through normally open contacts JC12 of a descending relay, one end of a control wire L1 onto a power supply bus between the normally closed contacts JC13 and the normally open contacts JC11, or between the normally closed contacts JC13 and the normally open contacts JC12, and the other end of the control wire L1 is divided into three paths through conducting wires. The device has the advantages that the on / off of a load tap switch can be controlled remotely; the experiment operation carried out when the operator mishears the operating command can be prevented; and the accuracy of the experiment is improved.
Description
technical field [0001] The invention relates to the technical field of power line maintenance devices, in particular to a remote control device for an on-load switch of a main transformer. Background technique [0002] The main transformer is the core equipment in the power system, and its various power outage tests take longer than other equipment, which directly affects the power transmission time of the entire substation. Statistics show that it takes an average of 4 people and 4.5 hours to complete the high-voltage test of a 220kV single transformer; it takes an average of 3 people and 3.5 hours to complete the high-voltage test of a 110kV single transformer, and the entire test takes the longest. Further statistical analysis found that the main transformer test time is mainly consumed in frequently adjusting the on-load tap changer. For 220kV transformers, the three tests of winding DC resistance test, short-circuit impedance, and on-load switch excessive waveform need...
Claims
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IPC IPC(8): G01R31/00
Inventor 乔红军魏国辉
Owner STATE GRID CORP OF CHINA