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Three-phase synchronization method based on wireless mode

A three-phase synchronous, wireless technology, applied in the fault location, detection of faults according to conductor types, etc., can solve the problems of low synchronization accuracy, insufficient timing redundancy, poor stability, etc., to improve redundancy and improve stability. and the effect of transient accuracy and reliability assurance

Active Publication Date: 2018-06-12
WILLFAR INFORMATION TECH CO LTD
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  • Abstract
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Problems solved by technology

At present, the wireless three-phase synchronization technology has the disadvantages of low synchronization accuracy, poor stability, and insufficient time synchronization redundancy.

Method used

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  • Three-phase synchronization method based on wireless mode
  • Three-phase synchronization method based on wireless mode
  • Three-phase synchronization method based on wireless mode

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Embodiment Construction

[0034] Such as figure 1 Shown is the method flow chart of the present invention: below take A phase as sending phase, B phase and C phase as receiving phase as example, the present invention is further described; During specific implementation, A phase, B phase and C phase can be arbitrarily exchange.

[0035] Under normal circumstances, each phase periodically samples the current or electric field data with the crystal oscillator period of the RTC, and the schematic diagram is as follows figure 2 shown

[0036] This wireless-based three-phase synchronization method provided by the present invention comprises the following steps:

[0037] S1. The three phases of the power system simultaneously receive the time synchronization signal periodically sent by the converging unit (such as image 3 shown), each phase saves its own sampling point location information and system time information at the same time; the sampling point location information is the absolute position count...

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Abstract

The invention discloses a three-phase synchronization method based on a wireless mode, and the method comprises the steps that three phases of a power system receive the time tick signals and store the respective sampling point position information and system time information at the same time; the three phases respectively calculate the sampling point position difference values and the system timedifference values; any one phase transmits its sampling point position difference value and system time difference value to the remaining two phases; the remaining two phases carry out the sampling point position synchronization and system time synchronization according to the received sampling point position difference value. The method improves the steady and transient precision of the zero-sequence current and zero-sequence voltage after three-phase overlapping. The method greatly increases the time tick period of a gathering unit, facilitates the reduction of the operation power consumption of the system, and improves the time tick redundancy of the gathering unit and the stability of the system. The method provides a reliable guarantee for the fault recording through improving the three-phase synchronization precision and the stability of the system.

Description

technical field [0001] The invention specifically relates to a wireless-based three-phase synchronization method. Background technique [0002] With the development of national economy and technology and the improvement of people's living standards, electric energy has become an indispensable secondary energy source in people's daily production and life, bringing endless convenience to people's production and life. [0003] Power distribution technology occupies a vital position in the power grid, and it is also a weak link in the power grid. There are some difficult problems in it, such as the difficulty in locating single-phase faults with small current grounding, and the failure process cannot be analyzed and traced. In order to complete the ground fault line selection faster and more accurately and analyze the process of on-site faults, it is very important to record the current and voltage data of the faulty line on site and the non-faulty line at the same time. Consid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086
Inventor 李绍文许健李君陈观强
Owner WILLFAR INFORMATION TECH CO LTD
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