• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2016, Vol. 37 ›› Issue (6): 43-48.doi: 10.3969/j.issn.1000-7229.2016.06.007

• 交直流大系统数字仿真理论与应用技术·栏目主持 徐政教授· • 上一篇    下一篇

考虑衰减直流分量的dq-120改进算法及其在混合仿真中的应用

杨洋,肖湘宁,陶顺,陈鹏伟   

  1. 新能源电力系统国家重点实验室(华北电力大学),北京市 102206
  • 出版日期:2016-06-01
  • 作者简介:杨洋(1989),男,通信作者,博士研究生,主要研究方向为电力系统仿真与分析; 肖湘宁(1953),男,教授,博士生导师,主要研究方向为电力电子技术、现代电能质量和高压直流输电技术; 陶顺(1972),女,副教授,从事智能配电网和电能质量等方面的教学与科研工作; 陈鹏伟(1992),男,博士研究生,研究方向为电力系统仿真技术与微电网技术。
  • 基金资助:

    中央高校基本科研业务费专项资金资助项目(2015XS22)

An Improved dq-120 Algorithm Considering Decaying DC Component and Its Application in Hybrid Simulation

YANG Yang, XIAO Xiangning, TAO Shun, CHEN Pengwei   

  1. State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University), Beijing 102206, China
  • Online:2016-06-01
  • Supported by:

    Project supported by the Fundamental Research Funds for the Central Universities(2015XS22)

摘要:

该文分析了故障电流含有衰减直流分量时传统dq-120算法的误差形成机理及表现形式。在此基础上,结合Prony算法提出了一种dq-120改进算法,该算法基于故障电流中含有直流分量的假设条件,对故障电流的dq-120计算结果进行模型降阶,简化了传统Prony算法的计算量并提升了dq-120算法对直流分量的免疫水平。借助PSCAD/EMTDC仿真软件,搭建了含有一回直流线路的IEEE 39节点系统机电-电磁暂态混合仿真模型。仿真结果表明,与传统的dq-120算法相比,改进算法明显提高了故障期间相量提取精度,从而有效提升了机电-电磁暂态混合仿真故障期间的仿真精度以及整个仿真过程的仿真精度。

关键词: 衰减直流分量, dq-120, Prony算法, 混合仿真, PSCAD

Abstract:

This paper analyzes the error forming principle of traditional dq-120 algorithm when the fault current containing decaying DC component and its display form. On this basis, an improved dq-120 algorithm is proposed combined with Prony algorithm. The improved algorithm can reduce the model order for the dq-120 calculation results of fault current based on the assumption that the fault current contains DC component, simplify the calculation of traditional Prony algorithm and improve the immune level of dq-120 algorithm to the DC component. With using PSCAD/EMTDC simulation software, we build an electromechanical-electromagnetic hybrid transient simulation model of IEEE 39-node system with a DC link. The simulation result shows that, compared with traditional dq-120 algorithm, the improved algorithm improves the phasor extraction accuracy of current during fault, so as to improve the accuracy of electromechanical-electromagnetic hybrid transient simulation during fault as well as the whole simulation process.

Key words: decaying DC component, dq-120, Prony algorithm, hybrid simulation, PSCAD

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