Measuring method of electrical parameters of gis conductive circuit
A technology of electrical parameters and measurement methods, applied in the direction of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as DC switching current source ripple
Active Publication Date: 2016-06-08
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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Problems solved by technology
[0005] There is a certain ripple in the output of the DC switching current source used in the traditional loop resistance test.
Method used
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Embodiment Construction
[0024] A kind of GIS conduction loop electrical parameter measurement method of the present invention, it comprises:
[0025] (1) Charge the capacitor through the charging circuit;
[0026] (2) After the capacitor is fully charged, cut off the charging circuit;
[0027] (3) described capacitor and GIS conductive rod, standard resistance form RLC circuit, capacitor discharges and produces the surge current of kiloampere level, obtains the complete waveform of the surge current that capacitor discharges, obtains GIS conductive rod voltage drop waveform;
[0028] (4) Obtain the change rate of the inrush current at zero time t m , at this time the loop resistance r of the GIS conductive rod under test can be calculated according to r=U tm / I m Calculated;
[0029] Wherein, the discharge process of the capacitor is a non-oscillating discharge process, the capacitance of the capacitor is Farad level, the inductance of the GIS conductive rod is microhenry level, U tm is the curr...
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The invention discloses a method of measuring electric parameters of a geographic information system (GIS) conducting loop. The method adopts kilo-ampere level impact currents generated by a second-order non-oscillatory circuit, a voltage insulation sensor is adopted to collect standard resistance and the voltage drop signals of a GIS conducting rod, the peak value of the impact currents is acquired, namely the instant current value obtained the change rate of the current is zero, and the voltage drop of a conducting connection piece of the moment corresponding to the zero change rate of the current, and the resistance of the loop is measured. The influence on the measuring of the resistance of the loop by the inductive component of the conducting rod is eliminated. Based on the accurate measuring of the resistance of the loop, the method of measuring the electric parameters of the GIS conducting loop abstracts the gradient of the impact currents, and measures the inductance value of the GIS conducting rod according to corresponding voltage drop of the conducting rod.
Description
technical field [0001] The invention relates to the technical field of contact state evaluation of GIS conductive rods, in particular to a method for measuring electrical parameters of a GIS conductive loop. Background technique [0002] GIS has the advantages of compact structure, small footprint, reliable operation, and small maintenance workload. Due to its closed nature, GIS is not affected by natural conditions such as pollution and weather. GIS is therefore increasingly widely adopted. [0003] In the actual operation of the power system, due to the insufficient insertion depth of the internal conductive rod during the installation of the GIS, the oxide film and burrs on the surface will increase the circuit resistance, causing the contact to heat up. After the contact is heated, the temperature rise will cause resistance. Further increase, forming a vicious circle, resulting in accidents occur from time to time. Although the maintenance of GIS conductive rods involv...
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IPC IPC(8): G01R27/04
Inventor 王岩阮绵晖詹清华罗容波李国伟王俊波陈斯翔谢剑
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID