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Power distribution network operation voltage detection method based on electric field sensor

An electric field sensor, operating voltage technology, applied in electrostatic field measurement, current/voltage measurement, voltage measurement only, etc., can solve problems such as non-contact voltage measurement, difficult distribution network operation analysis, etc., to achieve good electromagnetic resistance Interference ability, achieve high-precision measurement, solve the effect of inaccurate extraction

Inactive Publication Date: 2020-06-19
XI'AN POLYTECHNIC UNIVERSITY
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  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for detecting the operating voltage of a distribution network based on an electric field sensor. Problems with operational analysis

Method used

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  • Power distribution network operation voltage detection method based on electric field sensor
  • Power distribution network operation voltage detection method based on electric field sensor
  • Power distribution network operation voltage detection method based on electric field sensor

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] refer to figure 1 The installation structure of the electric field sensor 2 adopted by the detection method of the present invention is that the electric field sensor 2 includes an induction upper pole plate 15 and an induction lower pole plate 17, and an insulating medium 21 is arranged between the induction upper pole plate 15 and the induction lower pole plate 17. (select polyethylene material), between induction upper pole plate 15, induction lower pole plate 17, be directly provided with intrinsic capacitance 22 (electrical symbol C x ), between the induction upper pole plate 15 and the induction lower pole plate 17, a measuring capacitor 16 (electrical symbol C M );

[0026] The above-mentioned induction upper plate 15, measuring capacitance 16, induction lower plate 17, insulating medium 21, and inherent capacitance 22 are all...

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Abstract

The invention discloses a power distribution network operation voltage detection method based on an electric field sensor, and the method is characterized in that the method comprises the steps: 1) firstly installing a signal detection and processing unit under a power distribution line; 2) after the electric field sensor is placed under the A phase of the distribution line, indicating that the measurement direction of the electric field sensor is consistent with the direction of a point charge power line; 3) taking a three-phase distribution line as an example, setting three electric field sensor receiving ends, wherein a signal received by each electric field sensor contains linear superposition of three electric field signal sources, and obtaining a polynomial expression of an observation signal according to the electric field intensity data collected in the step 2 in a certain period; 4) after the electric field sensor obtains an electric field change observation signal at a fixedposition, the electric field change observation signal is separated through an algorithm to obtain an original electric signal of a three-phase distribution line, and 5) calculating the operation voltage of the distribution network. The method significantly reduces distortion interference on the measured space electric field and is high in precision measurement.

Description

technical field [0001] The invention belongs to the technical field of distribution network state monitoring and diagnosis, and relates to a method for detecting operating voltage of a distribution network based on an electric field sensor. Background technique [0002] The distribution network is the last link of the power system to supply power to users (residents, enterprises, etc.) in the generation, transformation, transmission and distribution of power system. The safe and stable operation of the distribution network is directly related to the interests of users. The distribution network covers a wide area, the installation volume is large, the network structure is complex, the operation and maintenance are difficult to manage carefully, and the distribution network failures occur frequently, seriously affecting people's production and quality of life. The common faults in the distribution network mainly include single-phase ground faults, phase-to-phase short-circuit ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R29/12
CPCG01R19/0084G01R29/12
Inventor 黄新波马一迪朱永灿邬红霞
Owner XI'AN POLYTECHNIC UNIVERSITY
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