Lightning arrester series resonance test device and method
A series resonance and test device technology, applied in the direction of testing dielectric strength, etc., can solve the problem of large interference of the power frequency reference of the arrester, and achieve the effects of avoiding errors, improving test accuracy, and simplifying the program processing flow
Active Publication Date: 2019-03-19
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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Problems solved by technology
[0003] In order to solve the problem that the power frequency reference of the lightning arrester tested by the test transformer is greatly disturbed, the present invention adopts the method of series resonance, and uses a capacitor voltage divider to provide a series resonance test device and method for the lightning arrester. According to the test device and method of the present invention, it is realized Power frequency reference voltage test of arrester
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Embodiment 1
[0025] like figure 1 As shown, this embodiment provides a lightning arrester series resonance test device, including a control power supply 1, an excitation transformer 2, an adjustable reactor 3, a fixed reactor 4, a capacitive voltage divider 5, a reference current transformer 6, and a test product Zinc oxide arrester 7, test current transformer 8.
[0026] After the control power supply 1 is connected to the excitation transformer 2, the output of one side of the excitation transformer 2 is connected to the adjustable reactor 3, the adjustable reactor is connected to one side of the fixed reactor 4, and the other side of the fixed reactor 4 is connected to the capacitor voltage divider 5 One side is connected, the tail end of the capacitor voltage divider 5 is connected in series with the reference current transformer 6 and then connected to the other side of the excitation transformer and grounded, the high voltage side of the lightning arrester 7 is connected to the high ...
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The invention discloses a lightning arrester series resonance test device and a method. The test device comprises a control power supply, an excitation transformer, a reactor, a voltage divider and atest sample. The control power supply controls voltage through the excitation transformer, a fixed reactor and an adjustable reactor are connected in series to form an inductance branch, the voltage divider and a sample lightning arrester are used as a capacitance branch, the voltage divider simultaneously takes the function of a measurement branch, the capacitance and the inductance branch form series resonance, the resonant voltage is applied to the sample and the control power supply controls and adjusts the voltage and frequency on the sample. According to the lightning arrester series resonance test device and the method, the tail end of the voltage divider is connected with a current transformer to obtain a capacitive reference current I0, a current transformer is connected at the tail end of the sample, a full current signal I1 passing through the lightning arrester is acquired, a resistive current is obtained by processing data of I0 and I1, an acquired voltage signal is not required to be processed, the program processing flow is simplified, and the testing precision is improved.
Description
technical field [0001] The invention relates to the field of high-voltage tests, in particular to a series resonance test device and method for a lightning arrester. Background technique [0002] In the power system, as an important overvoltage protection device, the arrester plays a key role in the protection of substation lightning overvoltage and operating overvoltage. The stable and reliable operation of the arrester determines the safe and reliable operation of the system. The power frequency characteristic parameter of the arrester is an important parameter of the arrester, which indicates the position of the saturation point of the volt-ampere characteristic curve of the arrester under the power frequency voltage. Measuring the power frequency reference voltage of the arrester is very important for studying the characteristics of the arrester and judging the quality of the arrester insulation. significance. The use of test transformers for power frequency parameter ...
Claims
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Login to View More IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 崔涛曾宏刘强雷潇廖文龙
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST