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Zero point detection method, phase-change switching method, system and phase-change switching equipment

A zero-point detection and equipment technology, applied in the field of systems and commutation switching equipment, zero-point detection methods, and commutation switching methods, can solve the problems of low judgment accuracy at zero-crossing time, and achieve the effect of solving distortion

Pending Publication Date: 2021-06-11
ZHEJIANG TENGEN ELECTRIC +2
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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low judgment accuracy of the zero-crossing time in the prior art, thereby providing a zero-point detection method, a commutation switching method, a system and a commutation switching device

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  • Zero point detection method, phase-change switching method, system and phase-change switching equipment
  • Zero point detection method, phase-change switching method, system and phase-change switching equipment
  • Zero point detection method, phase-change switching method, system and phase-change switching equipment

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[0046] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention provides a zero point detection method, a phase-change switching method, a system and phase-change switching equipment. The zero point detection method comprises the following steps: acquiring a to-be-detected signal; performing zero point detection on the to-be-detected signal by adopting a plurality of zero point detection modes to obtain a zero point detection moment corresponding to each zero point detection mode; screening out a candidate zero point moment set with all consistent detection results from the zero point detection moments corresponding to the zero point detection modes; and determining a target zero moment from the candidate zero moment set based on the time sequence. According to the invention, the accuracy of zero-crossing identification is improved.

Description

technical field [0001] The invention relates to the field of electric power commutation switching, in particular to a zero point detection method, a phase commutation switching method, a system and a phase commutation switching device. Background technique [0002] The power supply mode chosen by the domestic distribution network is mainly three-phase four-wire system. The rapid increase or decrease of a certain phase load will increase the three-phase imbalance of the distribution network. Once the three-phase imbalance increases, it will endanger the power distribution system. The related equipment of the network, serious imbalance will increase the loss of the transformer, resulting in the increase of the excitation current of the transformer. In severe cases, the transformer may be damaged, and at the same time, it will also endanger the user's equipment and cause great economic losses. [0003] At present, in terms of improving three-phase unbalance, the commonly used m...

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Application Information

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IPC IPC(8): G01R19/175H02J3/26H02J3/24H02J3/14
CPCG01R19/175H02J3/14H02J3/24H02J3/26Y02B70/3225Y02E40/50Y04S20/222
Inventor 陈思磊薛中正葛世伟高平李兴文李哲同向前
Owner ZHEJIANG TENGEN ELECTRIC
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