半月刊

ISSN 1000-1026

CN 32-1180/TP

+高级检索 English
基于暂态功率特性调整无功电流的高电压穿越控制策略
作者:
作者单位:

1.国网安徽省电力有限公司检修公司, 安徽省 合肥市 230001;2.河海大学能源与电气学院, 江苏省 南京市 210098;3.中国电力科学研究院有限公司(南京), 江苏省 南京市 210003

作者简介:

李曼(1994—),女,硕士研究生,主要研究方向:新能源发电并网控制技术。E-mail: li_echo_man@163.com

通讯作者:

王冰(1975—),男,通信作者,博士,教授,硕士生导师,主要研究方向:非线性控制与新能源技术。E-mail: icekingking@hhu.edu.cn

基金项目:

国家自然科学基金资助项目(51777058)。


Control Strategy of High Voltage Ride Through for Adjusting Reactive Current Based on Transient Power Characteristics
Author:
Affiliation:

1.Maintenance Company of State Grid Anhui Electric Power Co., Ltd., Hefei 230001, China;2.College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China;3.China Electric Power Research Institute (Nanjing), Nanjing 210003, China

Fund Project:

This work is supported by National Natural Science Foundation of China (No.51777058).

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    传统的光伏并网逆变器高电压穿越控制策略以削减有功功率为代价提高无功输出,难以平衡网侧电流和直流母线电压、抑制故障切除后电流和电压突变带来的暂态冲击。在分析高电压暂态功率特性的基础上,提出一种维持有功功率输出不变、调整无功电流参考值的高电压穿越控制策略。首先,以小信号模型分析高电压暂态功率特性,得出高电压期间有功功率不变、网侧无功冗余是抑制电压恢复的关键;然后,依据电网电压骤升幅度给出一种估算无功电流参考值的方法;在此基础上,结合有功电流控制,讨论3种不同电网电压骤升幅度下并网逆变器的控制能力,分别给出相应的高电压控制策略;最后,仿真和实验验证了所提控制策略的有效性。

    Abstract:

    Traditional control strategy of high voltage ride through (HVRT) for photovoltaic (PV) grid-connected inverter (GCI) improves reactive power output at the cost of reducing active power, which is difficult to achieve a balance between grid-side current and DC bus voltage. And it suppresses the transient impact caused by sudden voltage and current changes after the fault removal. Based on the analysis on the transient power characteristics of high voltage, an HVRT control strategy that maintains active power output and adjusts the reference value of reactive current is proposed. Firstly, a small-signal model is used to analyze the transient power characteristics of HVRT, which reveals that the key of suppressing voltage recovery is the constant active power and reactive redundancy on grid side. Secondly, a method for estimating the reference value of reactive current is proposed according to the voltage surge amplitude. On this basis, by combining with active current control, the control capacity of the GCI with three different voltage surge amplitudes is discussed, and the control strategies of HVRT are given respectively. Finally, the simulation and experiments verify the effectiveness of the proposed control strategies.

    表 3 Table 3
    图1 光伏发电系统并网模型Fig.1 Grid-connected model of photovoltaic power generation system
    图2 GCI网侧电压关系向量图Fig.2 Voltage vector diagram of GCI on grid side
    图3 HVRT电压调整流程图Fig.3 Flow chart of voltage regulation during HVRT
    图4 故障前后系统电压、电流、功率变化曲线Fig.4 Variation curves of system voltage, current and power before and after fault
    图5 不同控制策略下GCI控制范围对比图Fig.5 Contrast diagrams for GCI control ranges of different control strategies
    图 d-q坐标系下的GCI外环控制器Fig. Outer-loop controller of the GCI in d-q coordinate
    图 d-q坐标系下的GCI控制框图Fig. Control block diagram of GCI in d-q coordinates
    图 系统电压、电流仿真结果Fig. Simulation results of voltage and current
    图 GCI功率输出仿真结果Fig. Simulation results of GCI power output
    图 i d, ref、 i q, ref仿真结果Fig. Simulation results of i d, ref and i d, ref
    图 HVRT控制前后系统电压、电流控制效果图Fig. Control effects of voltage and current before and after the HVRT control
    图 实验平台Fig. Experimental platform
    图 HVRT控制前 U t和 I ac三相波形图Fig. Three-phase voltage U tand current I acwaveforms before the HVRT control
    图 HVRT控制后 U t和 I ac三相波形图Fig. Three-phase voltage U t and current I ac waveforms after the HVRT control
    图 HVRT控制前系统电压、电流变化曲线Fig. Voltage and current curves of the system before the HVRT control
    图 HVRT控制后系统电压、电流变化曲线Fig. Voltage and current curves of the system after the HVRT control
    表 1 Table 1
    表 2 Table 2
    参考文献
    相似文献
    引证文献
引用本文

李曼,王冰,曲立楠,等.基于暂态功率特性调整无功电流的高电压穿越控制策略[J].电力系统自动化,2020,44(6):59-66. DOI:10.7500/AEPS20190603011.
LI Man,WANG Bing,QU Linan,et al.Control Strategy of High Voltage Ride Through for Adjusting Reactive Current Based on Transient Power Characteristics[J].Automation of Electric Power Systems,2020,44(6):59-66. DOI:10.7500/AEPS20190603011.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-06-03
  • 最后修改日期:2019-07-14
  • 录用日期:
  • 在线发布日期: 2020-03-21
  • 出版日期: