Maintenance method and system for voltage regulating switch of power transformer
A technology of power transformers and voltage regulating switches, which is applied to the measurement of electrical variables, circuit breaker testing, instruments, etc., can solve the problems of low maintenance efficiency and difficulty, and achieve the effect of saving workload
Pending Publication Date: 2022-03-04
SHENZHEN POWER SUPPLY BUREAU
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Problems solved by technology
[0005] The object of the present invention is to propose a method and system for overhauling a voltage regulating switch of a power transformer to solve the technical problems of low overhaul efficiency and high difficulty in existing methods
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[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0046] like figure 1 As shown, it is a schematic diagram of an embodiment of a method for overhauling a voltage regulating switch of a power transformer provided by the present invention. In this embodiment, the method includes:
[0047] Obtain the connection data of the control loop where the target power transformer is located; that is, in order to understand the dynamic change process of the control loop, it is first necessary to determine the logical relationship of the control loop, which is essentially composed of internal circuits and relays according to specific logical relationships. For the control loop of the voltage regulating switch (in this embodiment, it is the MR voltage regulating switch), its internal logical relationship is given, and it only n...
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The invention provides a maintenance method and system for a voltage regulating switch of a power transformer, and the method comprises the steps: obtaining the connection data of a control loop where a target power transformer is located; the connection data of the control loop where the target power transformer is located is input into a preset maintenance model, and the maintenance model at least comprises a corresponding upshift model, a corresponding downshift model, a corresponding motor protection switch model and a corresponding auxiliary switch model; the upshift process and the downshift process are simulated according to the corresponding upshift model, the corresponding downshift model, the corresponding motor protection switch model and the corresponding auxiliary switch model, and an upshift simulation result and a downshift simulation result are obtained; the upshift simulation result and the downshift simulation result are compared with a preset upshift process relay state table and a preset downshift process relay state table respectively, and comparison results are obtained; and judging whether the voltage regulating switch of the power transformer is normal or not according to the obtained comparison result to obtain a final maintenance result. According to the method, the fault point is quickly determined, the optimal maintenance path is generated, the workload is reduced, and the accuracy is high.
Description
technical field [0001] The invention relates to the technical field of overhauling a voltage regulating switch of a power transformer, in particular to a method and system for overhauling a voltage regulating switch of a power transformer. Background technique [0002] The tap changer is one of the important structures of the transformer, which plays a vital role in the local voltage regulation of the power system. The traditional voltage regulating switch mechanism is complicated, and there are many kinds of relays with different functions, which makes its maintenance difficult. Even experienced maintenance personnel often spend a long time troubleshooting. [0003] The existing maintenance method is mainly that when the mechanism breaks down, the maintenance personnel need to disconnect the power supply of the control circuit, and check each relay one by one with a multimeter. The advantage is that every relay has been checked without any omission; the disadvantage is th...
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IPC IPC(8): G01R31/327
CPCG01R31/3278
Inventor 刘傲乔子洹
Owner SHENZHEN POWER SUPPLY BUREAU