Anti-overstep tripping system
A technology to prevent overstepping and tripping. It is applied to electrical components, emergency protection circuit devices, etc. It can solve the problems of lack of protection devices, loss, and expansion of power outages, and achieve the effect of ensuring normal work.
Active Publication Date: 2008-06-25
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Problems solved by technology
[0003] The disadvantage of the prior art is that there is no effective protection device to prevent over-level tripping accidents. Once over-level tripping occurs, it will affect the normal operation of other branches that have not failed, expand the scope of power outages, and bring unnecessary losses
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[0045]The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0046] As shown in Figure 1:
[0047] An anti-overstep tripping system, comprising a main switch 1 and a sub-switch 2, on which a high-voltage integrated protector is installed on the main switch 1 and the sub-switch 2, and the high-voltage integrated protector is composed of a signal acquisition module 3, a signal Composed of a processing module 4, a controller module 5 and an execution module 6; the acquisition module 3 collects signals and sends them to the signal processing module 4, and the signal processing module 4 processes the collected signals and sends them to the controller module 5. The controller module 5 discriminates the signal, and outputs the discriminated result to the execution module 6, and the execution module 6 respectively controls the work of the main switch 1 and the sub-switch 2 where it is located;
[0048]...
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The invention relates to an anti-override tripping system, high voltage comprehensive protector devices are arranged on a main switch and a sub switch, the voltage signal and the electric current signal are collected by the signal acquisition module in the high voltage comprehensive protector device and sent to a controller module, the controller module judges the signal, and the working of the main switch and the sub switch is controlled by the output result. The invention is characterized in that the locking signal sent by the sub switch and transmitted by the CAN bus line is connected between the controlling modules of the main switch and the sub switch. When a short circuit failure occurs in the sub circuit of the sub switch, the locking signal is sent by the protector; simultaneously, the tripping command is also sent, after receiving the locking signal, the main switch delays a period of time to wait for the tripping of the sub switch, if the sub switch does not trips, the main switch trips to protect the whole circuit, to prevent the override trip from occurring.
Description
technical field [0001] The invention belongs to a mine-used high-voltage microcomputer protection device, in particular to an anti-overstep tripping system in a power supply network. Background technique [0002] In a substation, one main switch often controls multiple sub-switches. At present, high-voltage protectors are installed on both the main switch and the sub-switches to detect the three-phase voltage, two-phase current, zero-sequence current and zero-phase current in the switch. Sequence voltage, when there is a fault such as short circuit or overcurrent in the circuit, the high voltage protector works, and by judging the magnitude of the current setting value, the corresponding switch in the circuit is controlled to trip. However, the mechanical response speed of the switch is relatively slow. When the distance between the main switch and the sub-switch is relatively close, the sub-switch has not fully executed the trip command, and the main switch operates because...
Claims
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IPC IPC(8): H02H7/26
Inventor 安文斗徐育军于乐泉槐利樊荣
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD