Line parameter double-end testing system and method based on GPS synchronization

A line parameter and test system technology, applied in capacitance measurement, measurement device, inductance measurement, etc., can solve the problems of interference level that is not easy to operate, cannot eliminate interference effects, etc., and achieve perfect test methods, high synchronization accuracy, and excellent accuracy. Effect

Inactive Publication Date: 2016-11-09
WUHAN DAYANG YITIAN TECH
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Problems solved by technology

[0003] The density of the power grid is getting higher and higher, double-circuit or multi-circuit lines on the same tower have become the norm, the coupling between lines has reached an unprecedented level, and the power frequency interference current induced by electromagnetic coupling can reach 100A. The demand for high-reliability power supply makes It is becoming more and more difficult to reduce the interference level t

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  • Line parameter double-end testing system and method based on GPS synchronization

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Embodiment Construction

[0022] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] Such as figure 1 As shown, the structure of the line parameter double-ended testing system of the present invention includes a head-end machine and a terminal machine,

[0024] The head-end machine includes a first CPU, a first GPS module, a variable frequency test power supply, a first wiring conversion module, a first A / D conversion module, a first signal conditioning module and a first voltage and current sensor. The first GPS The module, the frequency conversion test power supply, the first wiring conversion module, and the first A / D conversion module are respectively connected to the first CPU, and the first voltage and current sensor is connected to the first signal conditioning module and the first wiring conversion module at the same time, and the first wiring conversion module At the same time, it is also connected to the frequency con...

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Abstract

The invention provides a line parameter double-end testing system and method based on GPS synchronization, and the system and method can effectively achieve the synchronous measurement of data parameters of head and tail ends of a power transmission line. The structure of the system comprises a head end machine and a tail end machine. The head end machine comprises a first CPU, a first GPS module, a testing power module, a first wiring conversion module, a first A/D conversion module, a first signal conditioning module, and a first voltage and current sensor. The tail end machine comprises a second CPU, a second GPS module, a second wiring conversion module, a second A/D conversion module, a second signal conditioning module, and a second voltage and current sensor. The method comprises the steps: testing power outputting, wiring reverse rotating operation, the transmission of time data and pulse per second through the GPS modules, data collection, data storage, and data calculation.

Description

technical field [0001] The invention relates to the technical field of transmission line parameter testing, in particular to a system and method for dual-terminal testing of line parameters based on GPS synchronization. Background technique [0002] Positive-sequence parameters and zero-sequence parameters of high-voltage transmission lines, as well as mutual impedance and coupling capacitance between lines are important system parameters of the power grid. Power system overvoltage calculation, latent supply current calculation, power flow and stability calculation, short-circuit current calculation and relay protection The basic parameters such as setting calculation are the basis for primary equipment check of UHV transmission system, dynamic simulation of relay protection and development of new principle relay protection, formulation of control measures for safe and stable operation, analysis and selection of operation mode, etc. The geographical environment along the UHV...

Claims

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Application Information

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IPC IPC(8): G01R27/04G01R27/26
CPCG01R27/04G01R27/2605G01R27/2611
Inventor 程澜蔡成良
Owner WUHAN DAYANG YITIAN TECH
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