Anti-sway electricity method and device

An anti-shake, zero-sequence current technology, applied in circuit devices, emergency protection circuit devices, parts and components of emergency protection devices, etc., can solve problems such as affecting the normal operation of electrical equipment
CN109193554AInactive Publication Date: 2019-01-11CHINA COAL ORDOS ENERGY CHEM COP LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA COAL ORDOS ENERGY CHEM COP LTD
Publication Date
2019-01-11
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses an anti-sway electricity method and a device, which are applied to a power supply circuit of a high-voltage equipment. A method comprise that following step of: obtaining a zero-sequence current in a power supply loop of a high-voltage device; Judging whether the obtained zero-sequence current flows from the high-voltage equipment to the power supply; If so, the fault alarmcorresponding to the high-voltage equipment is issued or the power supply circuit of the high-voltage equipment is disconnected, so that the problem that the power shaking affects the normal operation of the electric equipment can be avoided.
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Description

technical field

[0001] The present application relates to the technical field of power electronics, in particular to an anti-swaying method and device. Background technique

[0002] Electricity shock refers to the phenomenon of short-term voltage fluctuations or short-term power outages in the power grid caused by lightning strikes, short circuits or other reasons. The basic types of swaying electricity generated by the power supply system are: voltage sag, swell, short-term power failure, and voltage flicker. Generally, when the effective value of the voltage of the power supply system drops to more than 30% of the nominal value and lasts for a long time (such as 80-200 milliseconds), it will cause the electrical equipment to stop working, or cause the quality of the produced products to decline. Contents of the invention

[0003] In view of this, the embodiments of the present application provide a method and device for anti-swaying electricity, which can solve the prob...

Claims

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