單相并聯(lián)逆變器的并網(wǎng)和孤島控制策略
明巖
(河北工業(yè)大學(xué) 電磁場(chǎng)與電器可靠性省部共建重點(diǎn)實(shí)驗(yàn)室,天津 300130)
摘 要:基于并網(wǎng)和孤島控制原理,研究了兩臺(tái)逆變器并聯(lián)系統(tǒng)的并網(wǎng)和孤島控制策略。在并網(wǎng)運(yùn)行時(shí)采用電流閉環(huán)控制,通過準(zhǔn)PR 調(diào)節(jié)器實(shí)現(xiàn)零穩(wěn)態(tài)誤差調(diào)節(jié);在孤島運(yùn)行模式時(shí)采用下垂控制和虛擬電感實(shí)現(xiàn)功率均分和環(huán)流抑制目標(biāo),并在下垂控制基礎(chǔ)上提出了一種混合濾波器平均功率提取方法。仿真結(jié)果表明,在孤島運(yùn)行模式下,與傳統(tǒng)提取方法相比,采用混合濾波器平均功率提取方法能夠有效抑制功率振蕩,提高系統(tǒng)電能質(zhì)量。
關(guān)鍵詞:逆變器并聯(lián);功率均分;環(huán)流;并網(wǎng)控制;下垂控制
中圖分類號(hào):TM464 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2016)10-0014-06
Grid-Connected and Islanding Control Strategy for Single-Phase Parallel Inverters
MING Yan
(Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical
Apparatus Reliability, Hebei University of Technology, Tianjin 300130, China)
Abstract: Based on the grid-connected and islanding control principle, this paper studied the grid-connected and islanding control strategy of the system with two parallel inverters. The current closed-loop control was adopted at the time of grid-connected operation. The standard PR regulator was used to realize zero steady state error regulation. In the islanding mode, the droop control and virtual inductance methods realized the targets of power sharing and circulating current suppression. On the basis of the droop control, this paper proposed a kind of average power extraction method with a hybrid filter. The simulation results show that under the isolated island operation mode, compared with the traditional extraction method, the average power extraction method adopting the hybrid filter could suppress the power vibration effectively, raising the system power quality.
Key words: inverters in parallel; power sharing; circulating current; grid-connected control; droop control
參考文獻(xiàn)
[1] 王成山,武震,李鵬. 微電網(wǎng)關(guān)鍵技術(shù)研究[J].電工技術(shù)學(xué)報(bào),2014,29(2):1-12.
[2] 張學(xué),裴瑋,鄧衛(wèi),等. 多源/ 多負(fù)荷直流微電網(wǎng)的能量管理和協(xié)調(diào)控制方法[J]. 中國電機(jī)工程學(xué)報(bào),2014,34(31):5553-5562.
[3] 馬藝瑋,楊蘋,王月武,等. 微電網(wǎng)典型特征及關(guān)鍵技術(shù)[J]. 電力系統(tǒng)自動(dòng)化,2015,39(8):168-175.
[4] 趙清林,郭小強(qiáng),鄔偉揚(yáng). 單相逆變器并網(wǎng)控制技術(shù)研究[J]. 中國電機(jī)工程學(xué)報(bào),2007,27(16):60-64.
[5] 李霞林,郭力,王成山. 微網(wǎng)主從控制模式下的穩(wěn)定性分析[J]. 電工技術(shù)學(xué)報(bào),2014,29(2):24-34.
[6] 韓培潔,張惠娟,李賀寶,等. 微電網(wǎng)控制策略分析研究[J]. 電網(wǎng)與清潔能源,2012,28(10):25-30.
[7] 王成山,肖朝霞,王守相. 微網(wǎng)綜合控制與分析[J].電力系統(tǒng)自動(dòng)化,2008,32(7):98-103.
[8] 鮑薇,胡學(xué)浩,李光輝,等. 獨(dú)立型微電網(wǎng)中基于虛擬阻抗的改進(jìn)下垂控制[J]. 電力系統(tǒng)保護(hù)與控制,2013,41(16):7-13.
[9] GOLESTAN S, JOORABIAN M, RASTWGAR H, et al. Droop Based Control of Parallel-Connected Single-Phase Inverters in D-Q Rotating Frame[C]//IEEE International Conference on Industrial Technology,2009:1-6.
[10] 徐順剛, 許建平, 曹太強(qiáng). 電壓電流雙閉環(huán)反饋逆變器并聯(lián)控制[J]. 電力自動(dòng)化設(shè)備,2009,29(10):103-106.
[11] 陳宏志,王旭,劉建昌. 基于虛擬電阻匹配模式的逆變器并聯(lián)方案[J]. 中國電機(jī)工程學(xué)報(bào),2012,32(6):24-32.
[12] 陳宏志,王旭,劉建昌,等. 基于阻抗匹配模式的并聯(lián)逆變器均流方法[ J ] . 電機(jī)與控制學(xué)報(bào),2012,16(8):36-41.
[13] 馬學(xué)軍,張志剛,李偉. 基于D S P 的無主從雙模塊單相逆變器并聯(lián)控制技術(shù)[J]. 電力自動(dòng)化設(shè)備,2009,29(2):110-112.
[14] MATAS J, CASTILLA M, LG De Vicuna,et al. Virtual Impedance Loop for Droop-Controlled Single-Phase Parallel Inverters Using a Second-Order General-Integrator Scheme[J]. IEEE Transactions on Power Electronics,2010,25(12):2993-3002.
[15] GAO Mingzhi, YANG Shangda, JIN Cheng, et al. Analysis and Experimental Validation for Power Calculation Based on p-q Theory in Single-Phase Wireless-Parallel Inverters[C]//IEEE Applied Power Electronics Conference and Exposition, 2011:620-624.
[16] 郭小強(qiáng),鄔偉揚(yáng),趙清林. 新型并網(wǎng)逆變器控制策略比較和數(shù)字實(shí)現(xiàn)[J]. 電工技術(shù)學(xué)報(bào),2007,22(5):111-116.