Synchronous measuring device for operating impedance of overhead line of distribution network

An overhead line and synchronous measurement technology, which is applied in the direction of measuring devices, grounding resistance measurement, measuring resistance/reactance/impedance, etc., can solve the problem that the line voltage, current and operating impedance cannot be measured in real time, so as to shorten the fault finding time, Improve power supply reliability and facilitate identification

Pending Publication Date: 2018-09-25
GUANGDONG POWER GRID CO LTD +1
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  • Claims
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Problems solved by technology

At present, the distribution network grounding impedance measurement device has been discussed, such as the method and instrument used in the patent CN200720062722.5 distribution network neutral point grounding impedance measurement and control device. Extinguish the ground fault arc through full compensation, but the disadvantage of this device is that it cannot measure the line voltage, current and operating impedance in real time and display them on the display device

Method used

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  • Synchronous measuring device for operating impedance of overhead line of distribution network
  • Synchronous measuring device for operating impedance of overhead line of distribution network
  • Synchronous measuring device for operating impedance of overhead line of distribution network

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Embodiment 1

[0018] Such as figure 1 As shown, the figure includes a voltage transformer V, a current transformer I, a voltage signal converter Y1, a current signal converter Y2, an RS32 optical transceiver G, a measurement control single-chip microcomputer T1, a display control single-chip microcomputer T2, and D is a display device.

[0019] The present invention provides a synchronous measurement device for the operating impedance of overhead lines in distribution networks, which includes an online measurement device, a synchronous time synchronization device, and a display device D, and the online measurement device, synchronous time synchronization device, and display device D pass through each other Fiber optic communication device for connection.

[0020] The online measurement device includes a voltage transformer V, a current transformer I, a voltage signal converter Y1, a current signal converter Y2, and a single-chip microcomputer control system. The voltage transformer V and t...

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Abstract

The invention relates to a measuring device for a power system, in particular to a synchronous measuring device for the operating impedance of an overhead line of a distribution network. The synchronous measuring device includes an online measuring device, a synchronous timing device, and a display device; the online measuring device, the synchronous timing device and the display device are connected to each other through an optical fiber communication device; the online measuring device acquires voltage and current signals; the synchronous timing device realizes the simultaneity of the measurement; and the display device prints and output the relevant voltage and current information or the calculated power information. Voltage, current and line operating impedance information is obtainedby the display device on the ground.

Description

technical field [0001] The invention relates to a measuring device of an electric power system, in particular to a synchronous measuring device for operating impedance of an overhead line of a distribution network. Background technique [0002] In the distribution network power system, the user-side load may change greatly, resulting in changes in the voltage, current, and frequency on the line, as well as changes in the line impedance and the power consumed by the impedance. In particular, when a single-phase short-circuit ground fault occurs, the operating impedance of the line becomes short-circuit impedance, and the value is greatly reduced. If a running impedance measurement device is installed at both ends of the line that needs to pay attention to the line impedance in the distribution network system, through the time synchronization system, not only can the running impedance of the line be measured in real time, but also the grounding short circuit fault can be detec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/20
CPCG01R27/205
Inventor 孔祥轩郑楚韬孙广慧张耀宇秦川陈君宇陈春泉凌忠标李斌黄骏
Owner GUANGDONG POWER GRID CO LTD
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