Zero sequence parameter live line measurement device of mutual inductance circuit

A technology for measuring devices and line parameters, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., which can solve the problems of impossible guarantee of simultaneous measurement, large amount of equipment, heavy workload, and influence

Inactive Publication Date: 2008-05-07
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 mutu

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  • Zero sequence parameter live line measurement device of mutual inductance circuit
  • Zero sequence parameter live line measurement device of mutual inductance circuit
  • Zero sequence parameter live line measurement device of mutual inductance circuit

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[0089] specific implementation

[0090]As shown in accompanying drawing 1 (in the figure: TV represents voltage transformer, and TA represents current transformer), measuring device proposed by the present invention is by GPS antenna and receiver, signal input connection terminal, signal transmitter, DSP synchronous data Composed of acquisition card, 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 through the signal input terminal and the signal transmitter Acquisition card, the output PPS signal of GPS antenna and receiver is connected with the DSP interrupt input of DSP synchronous data acquisition card; the output GPS serial time signal of GPS antenna and receiver is input to the serial port on the PC card; the DSP synchronous data acquisition card The collected data is connected to the PC card ...

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Abstract

The invention relates to a zero sequence parameter live measurement device for the mutual induction lines, which comprises a GPS antenna and receiver, a signal input wiring terminal, a signal transmitter, a DSP synchronous data acquisition card, a dead contact card, a relay and a PC card. The invention not only can measure the mutual inductance between lines, but also can measure the mutual resistance between the lines; moreover, the device enables the measurement of the zero sequence parameter of mutual induction lines not only to be accomplished in a stable state process, but also to be accomplished in a transient state process. The invention has the vital significance to the secure operation of an electric power system, thus having extremely widespread promotion and application value.

Description

[0001] The present invention is a divisional application of a Chinese patent application with the patent application number 200510019418.8, the application date is September 9, 2005, and the name is a method and device for live measurement of zero-sequence parameters of mutual inductance lines. technical field [0002] The invention belongs to the technical field of power system parameter measurement, in particular to a measuring device for live-line measurement of zero-sequence parameters of transmission lines. Background technique [0003] 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. [0004] The mutual impedance (mutual resistance and mutual inductance) between the lines will a...

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Application Information

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IPC IPC(8): G01R31/00G01R31/06G01R31/08G01R27/02
Inventor 陈允平胡志坚
Owner WUHAN UNIV
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