不对称电压跌落下逆变电源的多目标控制策略

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (3321 KB)
输出: BibTeX | EndNote (RIS)

摘要当电网发生不对称电压跌落时,需要对分布式逆变电源进行故障下的穿越控制,保证其能够继续向电网输送功率而不退出运行。提出一种新型的适用于分布式逆变电源接口逆变器的多目标控制策略,旨在满足多样化的故障穿越需求。首先,提出并推导一种新型的统一电流参考计算表达式,通过引入参数k₁和k₂来实现对多个目标的控制。然后,推导一种最优波动功率幅值的搜索路径用来实现对参数k₁和k₂的优化选择。通过简化最优搜索路径,得到了另一种线性的搜索路径,该路径可以近似代替优化路径并削减控制的复杂度。接着,根据控制目标在搜索路径上的单调性,设计了一种定功率波动幅值以及自适应的电流不平衡度限制的控制策略。最后,通过仿真算例验证了所提控制策略的有效性和灵活性。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	熊飞
	吴俊勇
	郝亮亮
	田明杰
	张巨瑞
	张皎

关键词 ：逆变电源, 电压跌落, 多目标, 功率控制, 电网故障

Abstract：The grid interface inverters of distribution generation should realize low-voltage ride-through property to deliver power to the grid under unbalanced voltage sags.In this paper,a novel multi-objective control strategy is proposed for grid-interface inverters to meet diverse ride-through requirements during gird faults.First,a unified formula for the current reference is established and multiple targets can be controlled by the adjustable parameters k₁ and k₂.Next,an optimized search path for k₁ and k₂ is derived to control the oscillating power of the inverter.Moreover,a linear search path which can replace the optimized one is obtained by simplifying the optimized path.Then,according to the monotonous property of the controlling objective,a novel multi-objective control scheme is proposed with adaptive limitation for the current unbalanced factor.Finally,the effectiveness and flexibility of the proposed control strategies are verified by simulation results.

Key words： Inverter voltage sag multi-objective power control grid fault

收稿日期: 2015-08-03 出版日期: 2017-01-19

PACS:

TM71

基金资助:北京市科技计划课题资助项目(D131104002013003)。

通讯作者: 熊飞男,1990年生,博士研究生,研究方向为新能源发电、电力系统分析与控制。 E-mail:13117383@bjtu.edu.cn

作者简介: 吴俊勇男,1966年生,博士,教授,博士生导师,研究方向为电力系统分析与控制、新能源发电和智能电网、铁道电气化、电力信息化。 E-mail:wujy@bjtu.edu.cn

引用本文:

熊飞, 吴俊勇, 郝亮亮, 田明杰, 张巨瑞, 张皎. 不对称电压跌落下逆变电源的多目标控制策略[J]. 电工技术学报, 2017, 32(1): 107-116. Xiong Fei,Wu Junyong,Hao Liangliang,Tian Mingjie,Zhang Jurui,Zhang Jiao. Multi-Objective Control Strategies of Grid Interface Inverter under Unbalanced Voltage Sags. Transactions of China Electrotechnical Society, 2017, 32(1): 107-116.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2017/V32/I1/107

[1] 阳同光,桂卫华.电网不平衡情况下并网逆变器控制策略综述[J].电工技术学报,2015,30(14):241-246.
Yang Tongguang,Gui Weihua.An overview on control strategies of grid-connected inverter under unbalanced voltage conditions[J].Transactions of China Electrotechnical Society,2015,30(14):241-246.
[2] 章玮,王宏胜,任远,等.不对称电网电压条件下三相并网型逆变器的控制[J].电工技术学报,2010,25(12):104-110.
Zhang Wei,Wang Hongsheng,Ren Yuan,et al.Investigation on control of three-phase grid-connected inverters under unbalanced grid voltage conditions[J].Transactions of China Electrotechnical Society,2010,25(12):104-110.
[3] 沈永波,年珩.不平衡及谐波电网下基于静止坐标系的并网逆变器直接功率控制[J].电工技术学报,2010,25(12):114-123.
Shen Yongbo,Nian Heng.Stationary frame direct power control of grid-connected inverter under unbalanced and harmonic grid voltage[J].Transactions of China Electrotechnical Society,2016,31(4):114-123.
[4] 周京华,刘劲东,陈亚爱,等.大功率光伏逆变器的低电压穿越控制[J].电网技术,2013,37(7):1799-1807.
Zhou Jinghua,Liu Jindong,Chen Yaai,et al.Low voltage ride-through control of high power inverter for gird-connection of photovoltaic generation[J].Power System Technology,2013,37(7):1799-1807.
[5] 陈亚爱,刘劲东,周京华.太阳能并网逆变器故障穿越控制策略[J].中国电机工程学报,2014,34(21):3405-3411.
Chen Yaai,Liu Jindong,Zhou Jinghua.Fault ride-through control strategy for solar grid-connected inverters[J].Proceedings of the CSEE,2014,34(21):3405-3411.
[6] 叶盛,黄守道,黄科元,等.不对称电压下 PWM 整流器的控制策略[J].电网技术,2010,34(10):94-98.
Ye Sheng,Huang Shoudao,Huang Keyuan,et al.Control strategy of pulse width modulation rectifier under asymmetrical input voltages[J].Power System Technology,2010,34(10):94-98.
[7] 郭小强,邬伟扬,漆汉宏.大电网电压畸变不平衡情况下三相光伏并网逆变器控制策略[J].电机工程学报,2013,33(3):22-28.
Guo Xiaoqiang,Wu Weiyang,Qi Hanhong.Control strategies of three-phase PV grid-connected inverter under distorted and unbalanced voltage conditions[J].Proceedings of the CSEE,2013,33(3):22-28.
[8] Ma Ke,Chen W,Liserre M,et al.Power controllability of a three-phase converter with an unbalanced AC source[J].IEEE Transactions on Power Electronics,2015,30(3):1591-1604.
[9] Rodriguez P,Timbus A V,Teodorescu R,et al.Flexible active power control of distributed power generation systems during grid faults[J].IEEE Transactions on Industrial Electronics,2007,54(5):2583-2592.
[10]Wang Fei,Duarte J L,Hendrix M A M.Pliant active and reactive power control for grid-interactive converters under unbalanced voltage dips[J].IEEE Transactionson Power Electronics,2011,26(5):1511-1521.
[11]Wang F,Duarte J L,Hendrix M A M.Design and analysis of active power control strategies for distributed generation inverters under unbalanced grid faults[J].IET Generation,Transmission & Distribution,2010,4(8):905-916.
[12]Castilla M,Miret J,Sosa J L,et al.Grid-fault control scheme for three-phase photovoltaic inverters with adjustable power quality characteristics[J].IEEE Transactions on Power Electronics,2010,25(12):2930-2940.
[13]Guo Xiaoqiang,Liu Wenzhao,Zhang Xue,et al.Flexible control strategy for grid-connected inverter under unbalanced grid faults without PLL[J].IEEE Transactions on Power Electronics,2015,30(4):1773-1778.
[14]王强钢,周念成,颜伟,等.电网电压不平衡下光伏发电系统的改进功率控制[J].中国电机工程学报,2013,33(增刊):30-37.
Wang Qianggang,Zhou Niancheng,Yan Wei,et al.Improved power control of photovoltaic generation system under unbalanced grid voltage conditions[J].Proceedings of the CSEE,2013,33(S):30-37.
[15]阳同光,桂卫华.电网不平衡情况下并网逆变器多目标协调控制策略研究[J].电工技术学报,2015,30(11):148-157.
Yang Tongguang,Gui Weihua.Research of multi-objectivecoordinated control strategies of grid-connected inverter under unbalanced voltage conditions[J].Transactions of China Electrotechnical Society,2015,30(11):148-157.
[16]邓哲,周峰武,林辉品,等.电网故障时基于双输入SOGI-FLL的新型电网快速同步方法[J].电工技术学报,2013,28(12):32-43.
Deng Zhe,Zhou Fengwu,Lin Huipin,et al.A novel fast grid-synchronization method under grid failure based on dual-input SOGI-FLL[J].Transactions of China Electrotechnical Society,2013,28(12):32-43.
[17]Rodriguez P.Advanced grid synchronization system for power converters under unbalanced and distorted operating conditions[C]//32nd Annual Conference on IEEE Industrial Electronics,Paris,France,2006:5057-5062.