Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device

An overvoltage and arc suppression technology, applied in emergency protection circuit devices, emergency protection circuit devices, circuit devices, etc. for limiting overcurrent/overvoltage, can solve the problem of single function, no arc suppression and suppression of overvoltage protectors. Harmonic function, power system equipment life and operational safety threats, etc., to solve the effect of arc suppression and fast action

CN104836220AInactive Publication Date: 2015-08-12HEFEI SETSAIL TELECOM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-08-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

A microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device relates to the technical field of arc extinguishing and harmonic eliminating of an electric power system. The microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device comprises a high-voltage current-limiting fuse, a voltage transformer, a three-phase combined type overvoltage protector, a vacuum contactor, a microcomputer arc-extinguishing controller, a high-voltage fuse and a zero-sequence current transformer, wherein three-phase ports of the three-phase combined type overvoltage protector are connected with a three-phase high-voltage isolation switch; a grounding terminal of the three-phase combined type overvoltage protector is connected with the voltage transformer and then grounded; the high-voltage fuse is connected in series between three-phase ports of the voltage transformer and the three-phase high-voltage isolation switch; a voltage transformer control terminal of the microcomputer arc-extinguishing controller is connected with the voltage transformer; a vacuum contactor control terminal of the microcomputer arc-extinguishing controller is connected with the vacuum contactor; three-phase ports of the high-voltage current-limiting fuse are respectively connected with the three-phase high-voltage isolation switch, while the other ends of the high-voltage current-limiting fuse are connected with the vacuum contactor; a grounding terminal of the vacuum contactor is grounded; and the zero-sequence current transformer is arranged between the grounding terminal of the vacuum contactor and a grounding point. The overvoltage-protecting device is high in action speed and capable of arc-extinguishing and harmonic-eliminating.
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Description

technical field

[0001] The invention relates to the technical field of arc suppression and harmonic elimination in electric power systems, in particular to a microcomputer arc suppression and harmonic elimination and overvoltage protection device. Background technique

[0002] At present, in the 3-35KW neutral point non-directly grounded power system, since various overvoltage protectors have no arc suppression, harmonic elimination functions, or single functions, it cannot effectively avoid the atmospheric overvoltage caused by the system phase-to-phase and phase-to-ground , single-phase intermittent arc grounding overvoltage, ferromagnetic resonance overvoltage and other accidents, these overvoltages pose a certain threat to the life and operation safety of power system equipment. Contents of the invention

[0003] The purpose of the present invention is to provide a kind of action speed fast. Overvoltage protection device capable of arc suppression and harmonic elimin...

Examples

Embodiment Construction

[0010] see figure 1 , a microcomputer arc suppression harmonic elimination and overvoltage protection device, which includes high-voltage current-limiting fuse FU, voltage transformer PT, three-phase combined overvoltage protector LBP, vacuum contactor JZ microcomputer arc suppression controller ZK, high voltage Fuse RD, zero sequence current transformer LH;

[0011] The microcomputer arc suppression controller ZK includes a voltage transformer control terminal and a vacuum contactor control terminal;

[0012] The three-phase ports of the three-phase combined voltage protector LBP are respectively connected to three-phase high-voltage isolating switches. The ground terminal of the three-phase combined overvoltage protector LBP is connected to the voltage transformer PT to be grounded. There is a high-voltage fuse RD in series between the three-phase port of the voltage transformer PT and the three-phase high-voltage isolating switch, and the microcomputer arc suppression cont...