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Line impedance parameter measuring device and method

A technology for impedance parameter and parameter measurement, applied in the field of electric power, which can solve the problems of difficulty in implementation, difficulty in obtaining impedance parameters accurately and quickly, etc.

Active Publication Date: 2018-10-19
JIANGNAN UNIV
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Problems solved by technology

[0003] In the existing impedance measurement technology, the line cable with a unit length is usually intercepted to measure the impedance parameter, and then the impedance parameter of the entire line is calculated according to the length. However, the above method is difficult to implement. At the same time, due to the frequent transformation of distribution network lines, it is difficult for traditional methods to accurately and quickly obtain the impedance parameters of the current line

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  • Line impedance parameter measuring device and method

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Embodiment Construction

[0046] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0047] Please refer to figure 1 , the present application discloses a line impedance parameter measurement device, the device includes: a housing 10, a main control unit, a measurement circuit, a display unit 20 and a measurement interface 30, the main control unit and the measurement circuit are arranged inside the housing 10, so not in figure 1 As shown in , the display unit 20 and the measurement interface 30 are arranged on the casing 10, and the specific setting positions are not limited. The main control unit can be any central processing unit currently available on the market, and the display unit 20 can be a digital display tube or a liquid crystal display. Screen, this application does not limit this, because the device is mainly used to measure the impedance parameters of the three-phase line in the low-voltage distribution networ...

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Abstract

The invention discloses a line impedance parameter measuring device and method, relating to the technical field of power. The circuit part of the device structure is that positive and negative electrodes of a storage battery pack are respectively connected to two input ends of a bidirectional converter module, two output ends of the bidirectional converter modules are respectively connected to twoinput ends of an inverter module, three output ends of the inverter module are used as an output end of a measuring circuit and are connected to a measuring interface and a main control unit, the measuring interface is used for connecting a load end of a line to be measured, and the main control unit is also connected to each switch tube and display unit in the bidirectional converter module andthe inverter module. By using the device and the method, the impedance parameters of installed lines in a distribution network and a micro grid can be quickly and conveniently measured, necessary datais provided for the power flow calculation and power control of the distribution network, an online measurement mode is adopted, and the device and the method are convenient to use.

Description

technical field [0001] The invention relates to the technical field of electric power, in particular to a device and method for measuring line impedance parameters. Background technique [0002] Power flow calculation is a very important analysis and calculation of power system. It is used to study various problems raised in system planning and operation. Power flow calculation refers to the calculation of active power, The distribution of reactive power and voltage in the power grid, in which the line impedance is an essential parameter in the power flow calculation of the power system, but for the low-voltage distribution network or the micro-grid on the distribution side, due to the At the end of the power supply, the line impedance parameters are not perfect. However, as an important part of the power system, the distribution network still needs the corresponding power flow calculation and power control. Therefore, the realization of line impedance measurement is of grea...

Claims

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Application Information

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IPC IPC(8): G01R27/08
CPCG01R27/08
Inventor 朱一昕樊启高杨苹许志荣张高峰
Owner JIANGNAN UNIV
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