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A permanent magnetic actuator vacuum circuit breaker assembly with series resistance

A technology of vacuum circuit breaker and combined device, which is applied in the direction of high-voltage air circuit breaker, circuit, electric switch, etc. The probability of contact fusion welding, the elimination of re-ignition overvoltage, the effect of reducing cost

Inactive Publication Date: 2011-06-01
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above four capacitor switching technologies for reactive power compensation, the first three are used, and the circuit breaker that selects the phase angle to close and open is not yet mature technically

Method used

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  • A permanent magnetic actuator vacuum circuit breaker assembly with series resistance
  • A permanent magnetic actuator vacuum circuit breaker assembly with series resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A substation needs to install reactive power compensation equipment on the 10kV side of the main transformer. The switching capacity of a single compensation capacitor C is designed to be 2400kVar, the impedance of the series reactor L is 6% of the capacitive reactance, that is, 9.63mH, and the vacuum circuit breaker of the permanent magnet operating mechanism is set. K 1 and K 2 , and in the permanent magnet operating mechanism vacuum circuit breaker K 1 In the branch where the resistor R is connected in series, the permanent magnet operating mechanism vacuum circuit breaker K 1 Series branch with resistor R and permanent magnet operating mechanism vacuum circuit breaker K 2 in parallel. Then the resistance of the resistor R connected in series in this device can be taken as 6.05Ω, accounting for 12% of the capacitive reactance, and the heat capacity of the resistor R is 6kJ; 1 Closed, after a delay of 10ms, the permanent magnet operating mechanism vacuum circuit b...

Embodiment 2

[0045] A substation needs to install reactive power compensation equipment on the 10kV side of the main transformer. The switching capacity of a single compensation capacitor C is designed to be 4000kVar, the impedance of the series reactor L is 6% of the capacitive reactance, that is, 5.78mH, and the permanent magnet operating mechanism vacuum circuit breaker is set. K 1 and K 2 , and in the permanent magnet operating mechanism vacuum circuit breaker K 1 A resistor R is connected in series in the branch, and the permanent magnet operating mechanism vacuum circuit breaker K 1 And the series branch with permanent magnet operating mechanism vacuum circuit breaker K 2 in parallel. Then the resistance value of the resistor R connected in series in this device can be taken as 5.44Ω, accounting for 18% of the capacitive reactance, and the heat capacity of the resistor R is 12kJ; 1 Closed, after a delay of 15ms, the permanent magnet operating mechanism vacuum circuit breaker K 2...

Embodiment 3

[0047] A substation needs to install reactive power compensation equipment on the 10kV side of the main transformer. The switching capacity of a single compensation capacitor C is designed to be 5400kVar, the impedance of the series reactor L is 6% of the capacitive reactance, that is, 4.28mH, and the permanent magnet operating mechanism vacuum circuit breaker is set. K 1 and K 2 , and in the permanent magnet operating mechanism vacuum circuit breaker K 1 A resistor R is connected in series in the branch, and the permanent magnet operating mechanism vacuum circuit breaker K 1 The series branch with resistor R and another permanent magnet operating mechanism vacuum circuit breaker K 2 in parallel. Then the resistance value of the resistor R connected in series in this device is 3.36Ω, accounting for 15% of the capacitive reactance, and the heat capacity of the resistor R is 20.5kJ; K 1 Closed, after a delay of 10ms, the permanent magnet operating mechanism vacuum circuit b...

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Abstract

The invention discloses a permanent magnet mechanism vacuum circuit breaker combined device which is provided with a series resistance, the device is provided with two vacuum circuit breakers or permanent magnet operating mechanism vacuum load switches, wherein, a resistor is connected in series on a branch circuit of one permanent magnet operating mechanism vacuum circuit breaker or the permanent magnet operating mechanism vacuum load switch, after that, the one is connected in parallel with the other permanent magnet operating mechanism vacuum circuit breaker or permanent magnet operating mechanism vacuum load switch; the invention realizes the procedure operation of switching off and switching on by a controller, and the invention has the functions of short-circuit fault detection and protection. The permanent magnet mechanism vacuum circuit breaker combined device which is provided with the series resistance of the invention is technically feasible, the permanent magnet mechanism vacuum circuit breakers have the advantages of stable action properties of switching off and switching on, small dispersibility, long mechanical service life and high reliability, and the invention also has certain advantage economically.

Description

technical field [0001] The invention belongs to the electric power equipment technology, and relates to a permanent magnet mechanism vacuum circuit breaker combination device specially used for switching parallel compensation capacitors with a voltage level of 10kV and above. Background technique [0002] The existing 10kV ~ 35kV vacuum circuit breakers use series reactors to suppress the closing inrush current when switching compensation capacitors. Although the inrush current amplitude can be suppressed within a certain multiple, the transition process of harmonic currents takes a long time and seriously Pollution to the power grid affects power quality; compensation capacitors and vacuum circuit breakers need to withstand overvoltages close to twice the normal voltage amplitude, which poses a threat to the insulation of compensation capacitors and the reliability of vacuum circuit breakers. Once the vacuum circuit breaker restarts when the compensation capacitor is remove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/66H01H33/666H01H33/52
Inventor 杨兰均郑士泉杨文海张伟政邝石董明
Owner XI AN JIAOTONG UNIV