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Shunting vector measurement equipment and method based on Beidou time service and crystal oscillator clock

A technology of Beidou time service and measurement method, which is applied in the direction of measuring device, measuring electrical variable, measuring current/voltage, etc., to achieve the effects of ensuring accuracy, reducing cumulative error, improving the scope of application and using efficiency

Pending Publication Date: 2022-06-24
WUHAN UNIV +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In order to solve the above problems, the purpose of the present invention is to provide a kind of shunt vector measurement equipment and method based on Beidou timing service and crystal oscillator clock, even when the Beidou timing service signal cannot be received, each current vector can be synchronously sampled and triggered, and accurately measured Phase difference between total current vector and individual shunt vectors

Method used

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  • Shunting vector measurement equipment and method based on Beidou time service and crystal oscillator clock
  • Shunting vector measurement equipment and method based on Beidou time service and crystal oscillator clock
  • Shunting vector measurement equipment and method based on Beidou time service and crystal oscillator clock

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Embodiment 1

[0044] refer to figure 1 , a shunting vector measurement method based on Beidou timing and high-precision crystal oscillator clock, comprising the following steps:

[0045] Step 1. Place the shunt test equipment in an open area, establish a Beidou timing connection with the Beidou positioning system, and complete the online work of the frequency-selective voltage and current meter (host) and the shunt vector test unit (slave);

[0046] Step 2. Under the condition that the Beidou timing signal is well received and the master and the slave can establish contact, the synchronous vector acquisition and detection unit is used to receive the Beidou timing second pulse with time stamp as the total input current vector and each shunt current vector acquisition and conversion. The trigger signal is used to complete the measurement of the shunt coefficient; the frequency selection voltage and current meter and the shunt vector test unit are mainly used for the measurement of the shunt c...

Embodiment 2

[0051] refer to figure 2 , a shunt test equipment, including a frequency-selective voltage and ammeter and a plurality of shunt vector test units, the shunt vector test units are all connected with the frequency-selective voltage and ammeter, the shunt test equipment is a new Beidou synchronous high-precision clock on the existing test equipment Compared with the existing shunt test equipment, the generator, microcomputer, high-speed data acquisition and other parts have the advantage that the shunt vector can be tested even when the Beidou timing signal cannot be received.

[0052] A first measurement module, a first Beidou synchronous high-precision clock generator, a first microcomputer and a first high-speed data acquisition module are integrated in the frequency-selective voltage and current meter. The first Beidou synchronous high-precision clock generator is connected to the first microcomputer, and the first microcomputer connection and the first measurement module ar...

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Abstract

The invention discloses shunting vector measurement equipment and method based on Beidou time service and a crystal oscillator clock, when Beidou time service signals are well received, pulse per second with a time label of the Beidou signals is received to serve as trigger signals for acquisition and conversion of shunting vector signals, and the shunting vector test work is completed. When a measurement environment is severe and a Beidou time service signal cannot be obtained, each current vector is synchronously triggered by using a second pulse signal corrected by a built-in high-precision clock generator of the measurement equipment, and the phase difference between the total current vector and each shunt vector is accurately measured; and the application range and the use efficiency of the shunting test equipment are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of power system grounding measurement, and in particular relates to a measuring device and method for shunt vector of grounding grid of power system substations. Background technique [0002] The substation grounding grid is one of the important measures to ensure the safe and reliable operation of the power system and the safety of operators. It provides a common reference ground for various electrical equipment in the substation, quickly discharges the fault current in the event of a system ground fault, and improves the distribution of the substation ground potential. With the further construction and transformation of the power grid, the safety problem of the grounding grid has become more and more prominent, and the necessity of carrying out the status assessment of the grounding grid of the substation follows. [0003] The substation grounding grid status assessment is mainly based on the combination ...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R25/00G04R20/04
CPCG01R19/00G01R25/00G04R20/04
Inventor 范毅鲁海亮王维蓝磊文习山王羽
Owner WUHAN UNIV
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