Study on Reactive Power Compensation and Its Resonance Damping Control Technology for Buck-type D-CAP

ZHANG Sanhong; DAI Ke; XIONG Liangli; CHEN Xinwen; WANG Xiaosheng

doi:10.14044/j.1674-1757.pcrpc.2018.05.005

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Study on Reactive Power Compensation and Its Resonance Damping Control Technology for Buck-type D-CAP

更新时间：2024-09-14

- Study on Reactive Power Compensation and Its Resonance Damping Control Technology for Buck-type D-CAP
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 39, Issue 5, Pages: 24-29(2018)
- 作者机构：
  
  1. 国家电网公司华中分部
  2. 华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室
  3. 华中科技大学中欧清洁与可再生能源学院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2018.05.005
  CLC： TM761.12
- Published：2018，
- 稿件说明：
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[1]张三洪,戴珂,熊亮雳,陈新文,汪晓胜.Buck型D-CAP无功补偿及其谐振阻尼控制技术研究[J].电力电容器与无功补偿,2018,39(05):24-29.

ZHANG SANHONG, DAI KE, XIONG LIANGLI, et al. Study on Reactive Power Compensation and Its Resonance Damping Control Technology for Buck-type D-CAP. [J]. Power capacitor & reactive power compensation, 2018, 39(5): 24-29.
[1]张三洪,戴珂,熊亮雳,陈新文,汪晓胜.Buck型D-CAP无功补偿及其谐振阻尼控制技术研究[J].电力电容器与无功补偿,2018,39(05):24-29. DOI： 10.14044/j.1674-1757.pcrpc.2018.05.005.

ZHANG SANHONG, DAI KE, XIONG LIANGLI, et al. Study on Reactive Power Compensation and Its Resonance Damping Control Technology for Buck-type D-CAP. [J]. Power capacitor & reactive power compensation, 2018, 39(5): 24-29. DOI： 10.14044/j.1674-1757.pcrpc.2018.05.005.

摘要

三相Buck型动态电容器（D-CAP）正常补偿无功时

在电网背景谐波的影响下

会产生谐振的问题。本文首先分析了Buck型D-CAP的基本结构和原理;接着通过对D-CAP自身阻抗和电网阻抗的建模

分析了谐振产生的原因

并计算出了相应的谐振点;同时针对其谐振频率附近的谐波

提出了通过检测D-CAP的电容电压构建反馈环路

实现有源谐振阻尼的控制方法;最后

提出了一种D-CAP在进行无功补偿的同时

实现谐波抑制和谐振阻尼的复合控制策略。通过该策略

谐振引起的网侧电流谐波畸变得到了明显抑制

网侧电流谐波含量达到了电能质量标准。实验结果验证了理论分析的正确性。

Abstract

Three-phase Buck-type dynamic capacitor（D-CAP）

in case of normal reactive power compen-sation will cause resonance under influence of background harmonics of grid. In this paper

the basic struc-ture and principle of Buck type D-CAP is analyzed

the reason for the resonance generation is analyzedthrough the modeling of self-impedance of D-CAP and impedance of grid and the corresponding resonancepoint is calculated. At the same time

as for the harmonics near its resonance frequency

it is proposed tobuild the feedback loop by way of detecting capacitance and voltage of D-CAP so to achieve the controlmethod of active resonance damping. Finally

the achievement of composite control strategy for harmonicsuppression and resonance damping by the D-CAP is proposed at the same time of performing reactive pow-er compensation. The current harmonic distortion of grid side due to resonance is remarkably suppressedthroughout the strategy

and the current harmonic contents at the grid side reaches power quality standard.The correctness of theoretical analysis is verified by the experimental result.

关键词

动态电容器无功补偿谐波抑制谐振阻尼复合控制策略

Keywords

dynamic capacitorreactive power compensationharmonic suppressionresonance dampingcomposite control strategy

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