﻿ 用于电网谐波溯源的谐波功率快速检测方法 Fast Detecting Method of Grid Harmonic Power for the Tracing of Harmonic Sources

Smart Grid
Vol.07 No.04(2017), Article ID:21866,8 pages
10.12677/SG.2017.74032

Fast Detecting Method of Grid Harmonic Power for the Tracing of Harmonic Sources

Kai Wang1, Xiangqian Tong2, Jian Qiang2, Limin Wu1

1Qinzhou Power Supply Bureau, Guangxi Power Grid Co., Ltd., Qinzhou Guangxi

2School of Automation and Information Engineering, Xi'an University of Technology, Xi'an Shaanxi

Received: Aug. 12th, 2017; accepted: Aug. 24th, 2017; published: Aug. 30th, 2017

ABSTRACT

The harmonic power detection in power grid is the basis of harmonic pollution evaluation and harmonic source tracing. With the sampled voltages and currents on the point of common coupling of power users with the grid, the definition and the calculation method of harmonic power was analyzed, and a fast calculation method of harmonic power based on instantaneous power theory was proposed. The d-q coordinate transformation of the three-phase voltages and currents under harmonic frequency was carried out first, and the DC component of the d-q axis was extracted with a low-pass filter, then the amplitude and flow direction of active power and reactive power for each harmonic used for tracing the harmonic source can be calculated according to the instantaneous power theory. A simulation model of a typical application system is established for harmonic power detection, and the simulation results verify the correctness of the harmonic power fast detection algorithm.

Keywords:Instantaneous Power Theory, Power Quality, Harmonic Monitoring, Harmonic Source Tracing, Harmonic Power

1广西电网责任有限公司钦州供电局，广西 钦州

2西安理工大学自动化与信息工程学院，陕西 西安

Copyright © 2017 by authors and Hans Publishers Inc.

This work is licensed under the Creative Commons Attribution International License (CC BY).

http://creativecommons.org/licenses/by/4.0/

1. 引言

2. 谐波功率及其应用

2.1. 交流正弦系统的基波功率

(1)

(2)

(3)

(4)

(5)

2.2. 交流非正弦系统的谐波功率

(6)

2.3. 谐波功率的应用

1) 谐波功率可以作为电网受谐波污染程度的一个综合评价指标

2) 谐波功率可以作为谐波溯源的依据

3. 谐波功率的瞬时检测方法

(7)

(8)

(9)

(10)

4. 仿真验证

Figure 1. Block diagram for the instantaneous h-order harmonic power detection

Table 1. Simulation parameters of the harmonic power detection system

Figure 2. Main circuit of the harmonic power detection system

Figure 3. Simulation model of the harmonic power detection system

Figure 4. Simulation results of the harmonic power detection system

5. 结论

Fast Detecting Method of Grid Harmonic Power for the Tracing of Harmonic Sources[J]. 智能电网, 2017, 07(04): 286-293. http://dx.doi.org/10.12677/SG.2017.74032

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