Capacitive voltage transformer and its integrated detection sensor
A technology for voltage transformers and detection sensors, which is applied in the directions of dielectric property measurement, voltage/current isolation, resistance/reactance/impedance measurement, etc. It can solve the problems of complex operation and single function of the detection device, and achieve multiple functions and simple operation Effect
Active Publication Date: 2019-12-10
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Problems solved by technology
[0005] Based on this, it is necessary to provide a capacitive voltage transformer with simple operation and multiple functions and its integrated detection sensor for the problem of complex operation and single function of the detection device of the general capacitive voltage transformer.
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[0013] Such as figure 1 As shown, an integrated detection sensor for a capacitive voltage transformer includes a voltage sampling module 100, a current sampling module 200, a UHF partial discharge sensing module 300 and a high frequency current sensing module 400;
[0014] The voltage sampling module 100 is connected to the secondary measurement winding in the capacitive voltage transformer to be detected, the current sampling module 200 is connected to the last screen line of the capacitive voltage transformer to be detected, and the high-frequency current sensing module 400 is connected in series to the capacitor to be detected The grounding wire of the last screen of the type voltage transformer, the high-frequency current sensing module 400 is connected to the current sampling module 200 through the grounding wire of the last screen, the UHF partial discharge sensing module 300 is connected to the grounding wire of the last screen, and the UHF local The distance between th...
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The invention provides a capacitive voltage transformer and an integrated detection sensor thereof. The integrated detection sensor of the capacitive voltage transformer comprises a voltage sampling module, a current sampling module, an ultrahigh frequency partial discharge sensing module and a high frequency current sensing module. The voltage sampling module acquires the voltage data of the capacitive voltage transformer. The current sampling module acquires the current data of the capacitive voltage transformer. The ultrahigh frequency partial discharge sensing module acquires the partial discharge signal inside the capacitive voltage transformer. The high frequency current sensing module acquires the partial discharge signal of the capacitive voltage transformer. The whole integrated detection sensor can acquire the voltage parameter, the current parameter, the inside partial discharge signal and the partial discharge signal of the capacitive voltage transformer to be detected. Based on the acquired parameters, an external detection device can easily detect the dielectric loss, inside partial discharge and partial discharge of the capacitive voltage transformer.
Description
technical field [0001] The invention relates to the technical field of equipment detection, in particular to a capacitive voltage transformer and an integrated detection sensor thereof. Background technique [0002] Potential transformers are very similar to transformers and are used to transform the voltage on the line. However, the purpose of transforming the voltage of the transformer is to transmit electric energy, so the capacity is very large, generally calculated in kilovolt-ampere or megavolt-ampere, and the purpose of the voltage transformer transforming voltage is mainly used for measuring instruments and relays. The protection device supplies power to measure the voltage, power and energy of the line, or to protect the valuable equipment in the line when the line fails. According to the working principle, voltage transformers can be divided into electromagnetic voltage transformers, capacitive voltage transformers and electronic voltage transformers. [0003] At...
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IPC IPC(8): G01R27/26G01R31/12G01R15/18
CPCG01R15/18G01R27/2617G01R31/1227
Inventor 杜钢陈俊王勇顾乐范旭娟熊俊邓剑平
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD