System and method for measuring break voltage of 500kV AC filter circuit breaker
A technology of AC filter and fracture voltage, which is applied in the direction of circuit breaker testing, measuring electricity, and measuring devices, and can solve the problems of large fluctuations in leakage current on site and high precision requirements for measurement systems.
Active Publication Date: 2016-11-16
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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Problems solved by technology
This method of evaluating the fracture voltage distribution based on the fracture leakage current, because the leakage current is generally in the μA level, requires high accuracy of the measurement system, and the leakage current is greatly affected by factors such as partial discharge and surrounding equipment corona, and the field leakage current fluctuates. larger
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[0032] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] Please refer to figure 1 with figure 2 As shown, a 500kV AC filter circuit breaker breaking voltage measurement system is suitable for measuring the breaking voltage of a 500kV circuit breaker with a Y-type or T-type structure. The measurement system includes a circuit breaker 1, a triple header 2 and a circuit breaker pillar 3. The circuit breaker 1 has a first fracture 11 and a second fracture 12, and the first fracture 11 and the second fracture 12 are respectively connected to the triple header 2. On the left and right sides of the triple box 2, the lower side of the triple box 2 is connected to the circuit breaker pillar 3. The other end of the circuit breaker pillar 3 is grounded, and further includes a measuring component for measuring the breaking voltage of the circuit breaker 1, and the measuring component...
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The invention discloses a system for measuring the break voltage of a 500kV AC filter circuit breaker, and the system comprises a circuit breaker, a three-in-one box, and a circuit breaker support column. The system also comprises a measurement assembly for measuring the break voltage of the circuit breaker. The measurement assembly comprises a discharge sphere gap, a discharge sphere gap support column, a DC high voltage generator, a DC control device, and a discharge rod. The invention also discloses a method for measuring the break voltage of the 500kV AC filter circuit breaker. The system directly measures the break voltage through the discharge sphere gap, eliminates the impact on the break voltage distribution from partial discharge, peripheral equipment corona and a circuit breaker support column, provides guide for the discharge fault diagnosis of the AC filter circuit breaker through calculating the distribution of DC components of the circuit breaker at two break ports after the switching-off of a capacitive load, and also can help a production operator master the voltage distribution condition of two break ports of the circuit breaker after the switching-off of the capacitive load.
Description
Technical field [0001] The invention relates to the technical field of direct current transmission system production and operation and maintenance, and in particular to a method for evaluating the voltage distribution of a 500kV AC filter circuit breaker with a double break based on actual measured break voltage. Background technique [0002] The 500kV AC filter circuit breaker is mainly used to switch the filter bank of the current station, and generally adopts T-type or Y-type double-break type. The special working condition of AC filter circuit breaker mainly lies in that when the AC filter bank is opened, the AC filter circuit breaker needs to withstand AC and DC mixed voltage. [0003] Please refer to the structure of 500kV AC filter circuit breaker figure 1 As shown, the circuit breaker 1 has a first fracture 11 and a second fracture 12, the left and right sides of the triple box 2 are respectively connected to the first fracture 11 and the second fracture 12, and the lower s...
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IPC IPC(8): G01R31/327
CPCG01R31/3275
Inventor 黎卫国张长虹卢文浩陈伟民杨旭周海滨
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID