A high current generator device
A high-current generator and rectifier technology, applied in measuring devices, parts and instruments of electrical measuring instruments, etc., can solve the problems of inconvenient test operation and inaccurate physical performance test operation.
Active Publication Date: 2021-01-05
WUHAN RECTIFIER INST
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Problems solved by technology
[0004] On the one hand, the existing temperature rise test device cannot realize accurate power supply voltage regulation of transmission lines, so it is impossible to accurately perform physical performance test operations under a certain power supply voltage;
[0005] On the other hand, because the transmission line conductor may be a DC transmission line or an AC transmission line, so in the transmission line, the prior art often needs to set up two kinds of equipment, a DC high current generator and an AC high current generator respectively. The test operation is very inconvenient
Method used
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Embodiment Construction
[0019] The principles and features of the present invention are described below in conjunction with examples, which are only used to explain the present invention and are not intended to limit the scope of the present invention.
[0020] Such as figure 1 figure 2 As shown, a large current generator includes a main control cabinet, an AC voltage regulator, a transformer, a rectifier and a current feedback loop; the main control cabinet is provided with a circuit breaker and a constant current controller; the AC voltage regulator Including two-phase input and two-phase output, the two-phase input of the AC voltage regulator is connected to the 380V two-phase AC power supply through the circuit breaker in the main control cabinet, and one phase output of the AC voltage regulator is connected to the The input end of the constant current controller is connected; the other phase output of the AC voltage regulator and the output of the constant current controller are respectively c...
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The invention relates to a high current generator. The high current generator comprises a main control cabinet, an alternating-current voltage regulator, a transformer, a rectifier and a current feedback loop; a circuit breaker and a constant current controller are arranged in the main control cabinet; the main control cabinet is used for power supply switching-on switching-off control and input electricity quantity display and can be also adopted as a wiring cabinet for input power source cables and measurement main cables; the voltage regulator performs rough voltage regulation on an outputvoltage; on the basis of the internal resistance of different test conductors, the voltage regulator is used to make the output voltage slightly higher than a load voltage, and then output current isaccurately adjusted through the constant current controller; negative feedback comparison is performed on a given value and an output value; and after PID operational amplification is performed, the constant current controller outputs constant alternating current at a load end, or constant direct current is outputted from the rectifier. The output waveforms of the device can be either single-phasealternating current sine waves or single-phase direct current ripple waveforms; and the output current of the device is constant and continuously adjustable, also has a constant voltage output function, and can realize tests for other purposes.
Description
technical field [0001] The invention relates to the technical field of maintenance equipment for high-voltage transmission lines, in particular to a large current generator device used in the temperature rise test of transmission line conductors. Background technique [0002] The temperature rise test of transmission line conductors is an important test to ensure the safety and efficient operation of the power grid. [0003] Yet existing temperature rise test device has following shortcoming: [0004] On the one hand, the existing temperature rise test device cannot realize accurate power supply voltage regulation of transmission lines, so it is impossible to accurately perform physical performance test operations under a certain power supply voltage; [0005] On the other hand, because the transmission line conductor may be a DC transmission line or an AC transmission line, so in the transmission line, the prior art often needs to set up two kinds of equipment, a DC high c...
Claims
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Login to View More IPC IPC(8): G01R1/28
CPCG01R1/28
Inventor 李坚李志宏
Owner WUHAN RECTIFIER INST