High-voltage direct-current on-off experiment device
An experimental device, high-voltage direct current technology, applied in the direction of circuit breaker testing, etc., can solve the problems of high cost of oscillation circuit and energy-consuming components, complex structure of DC conversion switch, high manufacturing and maintenance costs, and achieve the effect of optimal design
Active Publication Date: 2016-01-20
PINGGAO GRP +1
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Problems solved by technology
The cost of oscillation circuit and energy-consuming components is relatively high, the structure of the existing DC conversion switch is complex, and the cost of manufacturing and maintenance is relatively high
Method used
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Embodiment Construction
[0016] An embodiment of a high-voltage direct current breaking experimental device of the present invention: as Figure 1-3 As shown, the high-voltage direct current breaking test device includes a bracket 5 and a device body 6 arranged on the bracket 5. The device body 6 is in the shape of a cylinder extending in the up and down direction. The device body 6 is provided with a contact assembly, and the contact assembly includes an upper and lower A static arcing contact 8 and a moving arcing contact 9 are provided, and the device body 6 has a cavity for the moving arcing contact 9 to move. The experimental device also includes a motor-driven operating mechanism for driving the static arc contact 8 and the dynamic arc contact 9 to open and close. There are two applied voltage terminals on the device body so that the static arc contact and the dynamic arc contact form a closed circuit when closing. One is the applied voltage terminal 1 located at the upper end of the device body...
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The invention discloses a high-voltage direct-current on-off experiment device. The experiment device comprises a device body, a static arc contact and a moving arc contact, wherein the static arc contact and the moving arc contact are up-down arranged in the device body. The experiment device also comprises an operation mechanism used for driving the static arc contact and the moving arc contact to open and close a brake. The static arc contact and the moving arc contact are respectively connected with voltage applying ends. An observation window by which electric arcs generated during brake opening of the static arc contact and the moving arc contact can be observed is arranged on the outer side wall of the device body. According to the invention, the experiment device can simulate brake opening and closing processes of the static arc contact and the moving arc contact; by changing parameters of the operation mechanism driving the moving arc contact, moving speed of the moving arc contact can be changed; via the observation window arranged on the device body, electric arc states in different brake opening speed can be observed, the law of generating the electrical arcs can be found and optimal design of the switch structure can be further guided.
Description
technical field [0001] The invention relates to a high-voltage direct current breaking experiment device. Background technique [0002] In the HVDC transmission system, the conversion of certain operation modes and the removal of faults require the use of DC transfer switches, and the DC current has no zero-crossing point, so the breaking of the DC current must be forced to cross the zero point. But when the DC current is forced to cross zero, because the DC system stores huge energy to be released, the released energy will generate overvoltage on the circuit, causing the arc between the fractures to re-ignite, resulting in breaking failure. The DC transfer switches used in the HVDC converter stations that have been built in my country are composed of three parts: 1. A transfer switch transformed from an AC circuit breaker; 2. An oscillation circuit for the purpose of forming a current zero crossing point; 3. Energy-consuming components for the purpose of absorbing the energ...
Claims
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Inventor 张豪郭煜敬林生军王之军张博刘亚培
Owner PINGGAO GRP