Selection Method of Series Reactance Rate of Shunt Capacitor Bank in Substation Based on Impedance Criterion

GAN Jingfu; PAN Jianming; LIU Qiyu; LI Yonggang; LI Xinshuo; YAN Kun

doi:10.14044/j.1674-1757.pcrpc.2024.04.004

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Selection Method of Series Reactance Rate of Shunt Capacitor Bank in Substation Based on Impedance Criterion

Reactive Power Compensation and Filter | 更新时间：2024-09-15

- Selection Method of Series Reactance Rate of Shunt Capacitor Bank in Substation Based on Impedance Criterion
- Power Capacitor & Reactive Power Compensation Vol. 45, Issue 4, Pages: 19-27(2024)
- 作者机构：
  
  1.国网冀北电力有限公司唐山供电公司，河北　唐山　 063000
  2.华北电力大学电力工程系，河北　保定　 071003
  3.国网上海市电力公司市南供电公司，上海　 200233
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2024.04.004
  CLC：
- Published：2024-08，
  
  Received：13 February 2023，
- 稿件说明：
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GAN JINGFU, PAN JIANMING, LIU QIYU, et al. Selection Method of Series Reactance Rate of Shunt Capacitor Bank in Substation Based on Impedance Criterion. [J]. Power capacitor & reactive power compensation, 2024, 45(4): 19-27.
DOI：

GAN JINGFU, PAN JIANMING, LIU QIYU, et al. Selection Method of Series Reactance Rate of Shunt Capacitor Bank in Substation Based on Impedance Criterion. [J]. Power capacitor & reactive power compensation, 2024, 45(4): 19-27. DOI： 10.14044/j.1674-1757.pcrpc.2024.04.004.

摘要

为保证谐波不超标，实际应用中一般先投入高串抗率电容器，高、低串抗率电容器动作次数存在着差异性和不均衡性，而高串抗率电容器的配置和使用带来更大的有功损耗，经济性较差。针对这一问题，本文提出一种基于阻抗判据的变电站并联电容器组串抗率选择方法。首先，获取公共连接点谐波数据，建立状态空间表达式，采用卡尔曼滤波算法和标准差最小原则估计系统谐波阻抗；然后，依据电能质量标准得出限值谐波阻抗，分析并联电容器组限值谐波阻抗、等值谐波阻抗与谐波放大倍数的关系，确定串抗率选择的阻抗判据；最后，通过仿真算例验证本文方法的有效性和合理性。结果表明，所提方法能降低并联电容器组配置时优先使用高串抗率电容器带来的有功损耗，提高经济性。

Abstract

For assuring the harmonics not exceeding the standard

in practical applications the capacitor with high series reactance rate is switching firstly. The operation umber of reactors with high and low reactance rate has both difference and heterogeneity and

however

the configuration and use of capacitor with high series reactance rate brings greater active loss and weak economic performance. For this problem

a kind of selection method of series resistance rate of shunt capacitor bank in substation based on impedance criterion is proposed in this paper. Firstly

the harmonic data of the common connection point are obtained

and the state space expression is set up. The Kalman filter algorithm and the minimum standard deviation principle are used to estimate the harmonic impedance of system; Then

the limit harmonic impedance is obtained in accordance with power quality standard

and the relationship among the limit harmonic impedance

the equivalent harmonic impedance and the harmonic amplification factor of the shunt capacitor bank is analyzed to determine the impedance criterion for the selection of the series resistance rate; Finally

the effectiveness and rationality of the method proposed in this paper are verified by simulation examples. The results show that the proposed method can reduce the active power loss caused by the priority use of high series reactance rate capacitors in the configuration of shunt capacitor banks and improve the economic performance.

关键词

串抗率有功损耗卡尔曼滤波谐波阻抗阻抗判据

Keywords

series reactance rateactive power losskalman filteringharmonic impedanceimpedance criterion

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