Arc extinction, harmonic elimination and overvoltage protection device of microcomputer

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

CN105896513AInactive Publication Date: 2016-08-24合肥仁德电子科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-08-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an arc extinction, harmonic elimination and overvoltage protection device of a microcomputer, and relates to the technical field of arc extinction and harmonic elimination of a power system. The arc extinction, harmonic elimination and overvoltage protection device comprises high-voltage current-limiting fuses, a voltage transformer, a three-phase combined overvoltage protector, vacuum contactors, a microcomputer arc extinction controller, high-voltage fuses and a zero sequence current transformer, wherein three phase ports of the three-phase combined overvoltage protector are separately connected with three phase high-voltage isolation switches, a ground end is connected with the voltage transformer and then is grounded, the high-voltage fuses are connected in series between the three phase ports of the voltage transformer and the three phase high-voltage isolation switches, a voltage transformer control end of the microcomputer arc extinction controller is connected with the voltage transformer, vacuum contactor control ends are connected with the vacuum contactors, the three phase ports of the high-voltage current-limiting fuses are separately connected with the three phase high-voltage isolation switches, the other ends of the high-voltage current-limiting fuses are connected with the vacuum contactors, vacuum contactor ground ends are grounded, and the zero sequence current transformer is arranged between the ground end and a ground point. The overvoltage protection device has the advantages of fast action speed and can be used for arc extinction and harmonic elimination.
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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 elimina...

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...