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Mutual inductance circuit zero ordinal parameter live line measurement method and apparatus thereof

A zero-sequence parameter and measurement method technology, applied in the direction of measurement device, measurement of electricity, measurement of electric variables, etc., can solve the problems of impossible guarantee of simultaneity of measurement, influence, large amount of equipment, and large workload.

Inactive Publication Date: 2006-02-22
WUHAN UNIV
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Problems solved by technology

However, due to the increase of mutual inductance lines, it is often impossible to measure all the lines with mutual inductance at the same time, and the measurement of power failure separately will be affected by other operating mutual inductance lines
In addition, when there are many mutual inductance lines, the measurement data increases according to the square of the mutual inductance lines. According to the traditional power outage method, in a wide area, the amount of equipment and workload is too large to bear, and the simultaneity of measurement cannot be guaranteed.

Method used

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  • Mutual inductance circuit zero ordinal parameter live line measurement method and apparatus thereof
  • Mutual inductance circuit zero ordinal parameter live line measurement method and apparatus thereof
  • Mutual inductance circuit zero ordinal parameter live line measurement method and apparatus thereof

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[0086] specific implementation

[0087] as attached figure 1Shown (in the figure: TV represents voltage transformer, and TA represents current transformer), measuring device proposed by the present invention is made of GPS antenna and receiver, signal input connection terminal, signal transmitter, DSP synchronous data acquisition card, open Composed of output card, relay, and PC card; the zero-sequence voltage signal of the transmission line voltage transformer and the zero-sequence current signal of the current transformer are respectively connected to the DSP synchronous data acquisition card through the signal input terminal and the signal transmitter, GPS The output PPS signal of the antenna and the receiver is connected with the DSP interrupt input of the DSP synchronous data acquisition card; the GPS serial time signal output by the GPS antenna and the receiver is input to the serial port on the PC card; the data collected by the DSP synchronous data acquisition card is ...

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Abstract

This invention relates to one electrification measurement method of induce zero parameter, which comprises the following steps: a, getting each line zero order current and zero sequence voltage; using GPS to realize the simultaneous sampling of multi-end voltages and current signals; using modulator or Ethernet to assemble each measurement spots into center computer; then using OLS method to get induce circuit zero sequence parameters through differential equation set including resistance and parameters. The device comprises GPS antenna and receiver; signal inputting terminal, signal transducer, DSP simultaneous data collection card, quantity card, relay and PC card.

Description

technical field [0001] The invention belongs to the technical field of power system parameter measurement, and in particular relates to a method and a measurement device for live measurement of zero-sequence parameters of a power transmission line. Background technique [0002] With the development of power system scale, the power industry has higher and higher requirements for safe operation. Due to the increase of outgoing lines in power plants (substations), the old and new lines share the same pole, corridor or part of the corridor, and the electromagnetic coupling between the lines becomes increasingly serious. [0003] The mutual impedance (mutual resistance and mutual inductance) between the lines will affect the fault state of the line, especially the magnitude of the zero-sequence current, which has a great impact on the zero-sequence current protection. The mutual impedance between the lines is affected by many factors, such as the phase-to-phase distance of the l...

Claims

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Application Information

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IPC IPC(8): G01R29/18G01R31/00
Inventor 陈允平胡志坚
Owner WUHAN UNIV
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