﻿ 高压电气设备局部放电表征信息提取研究 Research on Partial Discharge Characterization Information Extraction of High Voltage Electrical Equipment

Advances in Energy and Power Engineering
Vol.04 No.06(2016), Article ID:19132,11 pages
10.12677/AEPE.2016.46026

Research on Partial Discharge Characterization Information Extraction of High Voltage Electrical Equipment

Jinhe Zeng1, Weidong Xu2, Wenwen Zhou2, Qingxian Diao1

1Guangdong Ziguang Electric Co., Ltd., Dongguan Guangdong

2School of Automation, Guangdong University of Technology, Guangzhou Guangdong

Received: Nov. 1st, 2016; accepted: Nov. 26th, 2016; published: Dec. 2nd, 2016

ABSTRACT

For the existing partial discharge mainly concentrated on the de-noising and identification researches, the partial discharge of the process of characterization information is rarely discussed. The problem of partial discharge representation information extraction is solved. There are 7 indicators extracted that the ratio of the number of positive and negative half cycles, the number of discharges, the ratio of the adjacent discharge amplitude and the interval between adjacent discharges. It is very important to study the mechanism of the partial discharges. Basing on the simulink platform builds up a partial discharge test circuit. Through the partial discharge waveform generated by the experiment, a variety of partial discharge characterization information is obtained. The mechanism of partial discharge is described in more detail. It provides the theoretical basis for the evaluation of the PD severity.

Keywords:Partial Discharge, Characterization Information, Simulink Simulation, Discharge Model

1广东紫光电气有限公司，广东 东莞

2广东工业大学自动化学院，广东 广州

1. 引言

2. 局部放电仿真研究

2.1. 仿真参数

Figure 1. The simulation circuit schematics

2.2. 仿真方法

3. 局部放电等效电路

Figure 2. Equal difference of voltage and duration

(a)(b)

Figure 3. (a) Air gap equivalent circuit; (b) the actual air gap diagram

4. 局部放电表征信息提取

4.1. 放电谱图特性分析

(a)(b)

Figure 4. (a) Initial discharge waveform; (b) the discharge emphasizes the waveform

Figure 5. φ-u and φ-n spectrograms of different PD stages. (a) Initial stage; (b) development stage; (c) saturated stage; (d) supersaturated stage

4.2. 表征信息提取

(1) 相邻PD脉冲幅值差异信息特征

(1)

(2) 最大放电脉冲幅值比值

(2)

(3) 相邻放电时间间隔ΔT信息特征

Figure 6. Adjacent PD pulse amplitude difference

Figure 7. Actual measured partial discharge pulse signal

(3)

(4)

(5)

(4) 放电信号熵fn均方根信息特征

(6)

(5) 放电电荷量ΔQ

(7)

(8)

(9)

(10)

(11)

(12)

(6) 放电能量W

(13)

(14)

(15)

(7) 放电功率P

Figure 8. Square relationship between discharge energy and charge

Figure 9. Single partial discharge signal

(16)

(17)

(18)

5 结论

(2) 通过对PD发展过程各项表征信息值的描述并阐明了各特征值的物理含义，根据不同含义建立数学公式，从数学上评价局部放电的不同严重程度，有利于后续建立局部放电严重程度评价模型。

(3) 多项表征信息指标所反映不同阶段下的局部放电，表征信息之间存在着关联性，可以识别由于外部干扰造成某项表征数据异常或数据测量误差，避免单一从某项表征信息指标判断局部放电严重程度带来的不准确性。

Research on Partial Discharge Characterization Information Extraction of High Voltage Electrical Equipment[J]. 电力与能源进展, 2016, 04(06): 205-215. http://dx.doi.org/10.12677/AEPE.2016.46026

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