中国电力 ›› 2016, Vol. 49 ›› Issue (4): 166-169.DOI: 10.11930/j.issn.1004-9649.2016.04.166.04

• 发电 • 上一篇    下一篇

基于分布式电源的电网电压和频率控制优化

李明德1,夏向阳2,王锦泷2,罗继平1,黄海1,陈国丽2,刘启凡2   

  1. 1. 衡阳市产商品质量监督检验所,湖南 衡阳 421001;
    2. 长沙理工大学 电气与信息工程学院,湖南 长沙 410004
  • 收稿日期:2015-10-18 出版日期:2016-04-20 发布日期:2016-04-27
  • 作者简介:李明德(1970-),男,湖南怀化人,工程师,研究方向为电气设备检验检测和电气控制等。E-mail: summer719@sohu.com
  • 基金资助:
    湖南省科技计划项目(2014GK3006); 长沙市科技计划项目(K1501012-11)

Voltage and Frequency Control Optimization for Distributed Generation Based Grid

LI Mingde1, XIA Xiangyang2, WANG Jinlong2, LUO Jiping1, HUANG Hai1, CHEN Guoli2, LIU Qifan2   

  1. 1. Hengyang Products Quality Supervision Inspection and Institute, Hengyang 421001, China;
    2. College of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha 410004, China
  • Received:2015-10-18 Online:2016-04-20 Published:2016-04-27
  • Supported by:
    This work is supported by Hunan Science and Technology Project(No. 2014GK3006); Changsha Science and Technology Project (No. K1501012-11).

摘要: 针对光伏发电具有间歇性和不稳定性问题,在并网逆变系统的基础上提出一种多参数滞环电流控制策略,该控制策略是在保证直流侧电压在600 V以上的基础下,在滞环控制前提下引入环宽反馈控制,利用PI器控制来调整环宽,使得开关频率相对稳定,从而使系统的能量转换效率高,系统的鲁能棒性和动态性能较好,并且向系统输送高质的并网电流。最后对保证直流侧电压为600 V以上的前提下的逆变系统进行仿真,仿真结果证明了这一方法的优越性。

关键词: 分布式电源, 多参数, 滞环控制, 开关频率, 直流侧电压

Abstract: This paper introduces a multi-parameter hysteresis-band current control strategy based on grid connected inverters to address the intermittent and instability issues associated with photovoltaic power generation. The control strategy is based on a minimum DC side voltage of 600 V and uses ring-width feedback control together with hysteresis-band current control. A PI control is used to adjust the ring-width to maintain a relative stable on/off switching frequency, deliver high system energy conversion efficiency, improve the robustness and dynamic performance of the system, and deliver high quality power to the grid. Finally, a simulation of the inverter system under the premise of minimal DC side voltage of 600 V is presented, with results confirming the superior performance of the proposed control strategy.

Key words: distributed generation, multi-parameter, hysteresis control, switching frequency, DC side voltage

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