Capacitor state detection method and detection system
A state detection and capacitor technology, which is applied in the field of capacitors, can solve problems that affect the stable operation of the power grid, inaccurate evaluation results, and prone to missed detection, so as to reduce the use of manpower, improve detection efficiency and accuracy, and reduce labor costs. Effect
Active Publication Date: 2015-11-18
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0002] In the power supply network, in order to ensure the stable operation of the grid power supply, there are many capacitors in the capacitor as reactive power compensation equipment. With the use of capacitors, the state of the capacitor itself will change, such as capacitor bubbling and the electrolyte inside the capacitor or When the winding tape changes, when the state of the capacitor changes, the performance of the capacitor itself will decline, which will seriously affect the stable operation of the power grid. In the prior art, the detection of capacitor bubbling is mainly through manual inspection, which is inefficient and expensive. Large, prone to missed detection; and there is no effective method to detect the state change inside the capacitor, often based on empirical formulas, and the evaluation results are extremely inaccurate
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[0038] figure 1 It is a schematic structural diagram of the present invention, figure 2 It is an electrical principle block diagram of the present invention, image 3 It is the left view in 1, as shown in the figure, a capacitor state detection method provided by the present invention includes at least two coils 1, the coils 1 are respectively arranged on both sides of the capacitor 2 and the two coils 1 are arranged coaxially;
[0039] Apply 1 power to the two coils and control the coils to generate a stable magnetic field and generate a stable electric field between the two coils 1, detect the magnetic flux passing through the capacitor 2 and the capacitance value between the two coils 1, according to the magnetic flux and capacitance The change of the value determines the state of the capacitor, which can accurately detect the external state and internal state of the capacitor, detect the state change of the capacitor in time and deal with the changed capacitance accordin...
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The invention provides a capacitor state detection method, which is characterized by at least comprising two coils, wherein the coils are arranged on two sides of a capacitor respectively, and the coils are coaxially arranged. The two coils are electrified and controlled to generate stable magnetic fields as well as an electric field between the two coils, magnetic flux penetrating the capacitor and a capacitance value between the two coils are detected, and the state of the capacitor is determined according to changes of the magnetic flux and the capacitance value. The capacitor state detection method and a capacitor state detection system provided by the invention can detect external state and internal state of the capacitor accurately, discover the state change of the capacitor timely and carry out corresponding processing on the changed capacitor, eliminate potential risks in a power grid, ensure power supply stability, reduce the use of manpower, reduce labor costs, and improve the detection efficiency and accuracy.
Description
technical field [0001] The invention relates to the field of capacitors, in particular to a capacitor state detection method and detection system. Background technique [0002] In the power supply network, in order to ensure the stable operation of the grid power supply, there are many capacitors in the capacitor as reactive power compensation equipment. With the use of capacitors, the state of the capacitor itself will change, such as capacitor bubbling and the electrolyte inside the capacitor or When the winding tape changes, when the state of the capacitor changes, the performance of the capacitor itself will decline, which will seriously affect the stable operation of the power grid. In the prior art, the detection of capacitor bubbling is mainly through manual inspection, which is inefficient and expensive. Large, it is easy to miss detection; and there is no effective method to detect the state change inside the capacitor, and the judgment is often based on empirical f...
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Inventor 黄雪昀张曦苑吉河杨孝华黄华勇
Owner STATE GRID CORP OF CHINA