TWI286413B - Parallel inverters and controlling method thereof - Google Patents

Parallel inverters and controlling method thereof Download PDF

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Publication number
TWI286413B
TWI286413B TW094117599A TW94117599A TWI286413B TW I286413 B TWI286413 B TW I286413B TW 094117599 A TW094117599 A TW 094117599A TW 94117599 A TW94117599 A TW 94117599A TW I286413 B TWI286413 B TW I286413B
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Taiwan
Prior art keywords
inverter
controller
load
parallel
output voltage
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TW094117599A
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English (en)
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TW200642253A (en
Inventor
Jing-Tao Tan
Yang Li
Yong-Hua Cheng
Jian-Ping Ying
Charles Tsai
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Delta Electronics Inc
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Priority to TW094117599A priority Critical patent/TWI286413B/zh
Priority to US11/439,324 priority patent/US7420826B2/en
Publication of TW200642253A publication Critical patent/TW200642253A/zh
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/493—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Inverter Devices (AREA)

Description

1286413 九、發明說明： 【發明所屬之技術領域】 本發明係指一種換流器（INVERTER)並聯系統及 其控制方法，尤指在並聯的換流器之間無通訊匯流排 的換流器並聯系統及其控制方法，用以達成無線負載 分配（WIRELESS LOAD-SHARING)。
【先前技術】 隨著對於不斷電電源供應器（UPS)之優異性能與 可靠度的要求日益增加，並聯換流器的無線負載分配 (WIRELESS LOAD-SHARING)技術正被廣泛地使用於 各項產品上；所謂無線負載分配，係指彼此並聯的換 流器無須藉由通訊匯流排即可實現各變換器之間向負 載提供的實功和虛功按比例分配。 為了達成實際的冗餘(redundancy)狀態，習用技術 中已提出了數種無線控制技術，詳細說明請參閱引用 文獻[1]〜[7]、美國專利5,745,356號案以及美國專利 6,381，157B2 號案。 、在已知的無線並聯系統中，其使用的控制方法皆 源自於傳、、4的下垂方法⑽⑼p脱&⑽；美國專利 6’8Q3’679B1 _即為-例。而為了獲得良好的功率分 配控制坦路係針對換流器之輸出電壓的頻率以及振 幅下垂，以達到舎.
4貝戟分配的目的。然而，這類無線並 聯技術中至少存太I „ .. ^ ^ 廿在者一個極大的問題：即各變換器之 間器件參數的;^ __ , 致將影響變換器之間負載分配的精 5 1286413 而變換器之間器件參數的不一致將不會對變換器的 載分配產生影響。此外，本案並提出分析及實驗結1 以確認所提出並聯系統及其控制方法的有效性。 本案得藉由下列圖式及詳細說明，俾得更深 瞭解： 之 【實施方式】 ◎本發明並聯換流器之負載分配基本方法 φ (a)功率流控制法則 請參閱第一圖，其為換流器並聯系統之原理圖。 其中，換流器INV1及INV2係各自經由一濾波電感（幻 及X2)而連接於一負載Z。如熟習本項技術者所知也， 源自於第i個換流器（i=l或2)的實功率流和虛功率济 可分別以（1)式與(2)式表示 ^ (1) Q ^K^〇cos<Pi (2) (1)式與(2)式之中，Vi為第i個換流器之輸出電壓 的振幅’ 0i為第i個換流器之輸出電壓的相位角，Vo 則為負载Z之端電壓的振幅。 由此可知，為了控制並聯系統中各換流器的功率 流’必須針對所有換流器之輸出電壓的振幅及相位角 進行測量及控制。 睛參閲第二圖，其為一種換流器功率流控制方法 7 1286413 的示意圖。其中，不論是換流器INV1或INV2皆係利 用一實功率及虛功率控制器以及一正弦參考波產生器 以進行功率流之控制。由於實功率及虛功率控制器的 巧増益，因此源自各換流器的功率流係完全遵循參考 值如下 P' - Pref\ Q\ = Qref\ P2 = Pref2 Ql = Qref2 在有線並聯系統中，所有的換流器都因為彼此間 的通訊而具有相同的參考功率，亦即 ^refl ~ Pref2 Qrefl = Qr^2 同時’藉由功率流控制方法亦能夠達成優異的換 流器負載分配，亦即 pi=p2 a=e2 (b)於無線系統中獲得參考功率 报明顯地’達成負載分配的關鍵點在於如何使得 所有並聯換流器獲得相同的參考功率；然而，問題是 ，們如何在沒有通訊連接（無線）的情況下獲得相同的 參考功率？ 請參閱第三圖，其為習用技術中換流器無線並聯 夏統之示意圖。其中，換流器INV1和INV2之間並不 ^有任何的通訊匯流排，但仍然共同連接於同一個負 換！^ad。負載電壓的資訊係共用於所有的換流器; 相^話換流器INV1和INV2皆可自負載電壓獲得 ^同的資訊。由此可知，如果換流器INV1和INV2都 U藉由同樣的演算法則從負載電壓的資訊中獲得 8 1286413
Inverters”，PESC 2003 [2] 3VL C· Chandorkar and D. M. Divan, “Control of Parallel Connectedlnverters in Standalone AC Supply System，” IEEE Trans· IncLApplicat·，vol· 29，no· 1，pp. 136-143, Jan./Feb. 1993.
[3] A. Tuladhar，H. Jin，T. Unger，and K· Mauch， “Parallel Operation of Single Phase Inverter Modules With No Control Interconnections，” in Proc· IEEE-APEC，97 Conf” 1997, pp. 94-100.
[4] S· J· Chiang，C· Y· Yen, and Κ· T· Chang，“A Multimodule Parallelable Series-Connected PWM Voltage Regulator，” IEEE Trans· Ind. Electron·，vol· 48, no. 3, June 2001，pp· 506-516· [5] A. Engler，“Control of Parallel Operating Battery Inverters/5 in PV Hybrid Power Systems, 2000.
[6] U· Borup，F. Blaabjerg, and R N. Enjeti， “Sharing of Nonlinear Load in Parallel-Connected Three-Phase Converters/5 IEEE Trans.Ind. Applicat., voL 37, no· 6, Nov./Dec· 2001，pp· 1817-1823.
[7] J. M. Guerrero, L. Garcia de Vicuna, J. Matas, and J. Miret，“A Wireless Load Sharing Controller to Improve Dynamic Performance of Parallel-Connected UPS Inverters” in Proc. IEEE-PESC，03 Conf·，2003 18

Claims (1)

1286413 13.如申請專利範圍第12項之換流器並聯系統，其中 該虛功率控制器係選自一比例積分控制器、一平滑模 式控制器、一模糊式控制器、一適應性控制器以及一 非線性控制器其中之一。 22
TW094117599A 2005-05-27 2005-05-27 Parallel inverters and controlling method thereof TWI286413B (en)

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TW094117599A TWI286413B (en) 2005-05-27 2005-05-27 Parallel inverters and controlling method thereof
US11/439,324 US7420826B2 (en) 2005-05-27 2006-05-23 Parallel inverters and controlling method thereof

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TWI601352B (zh) * 2014-11-06 2017-10-01 台達電子工業股份有限公司 一種用於逆變系統的控制方法及控制裝置
TWI728573B (zh) * 2019-11-27 2021-05-21 茂達電子股份有限公司 自適應頻率調整系統

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CN103155335A (zh) * 2010-10-01 2013-06-12 三星Sdi株式会社 用于能量存储***的功率转换***及其控制方法
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CN102820843B (zh) * 2012-08-24 2014-08-06 中冶南方（武汉）自动化有限公司 基于平均功率反馈的变频器并联控制方法
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CN105896588B (zh) * 2014-10-16 2018-03-02 国家电网公司 一种逆变器参数控制方法
CN106329575B (zh) * 2016-09-20 2019-02-05 北京鼎汉技术股份有限公司 一种数字化控制逆变器无线并联时精确锁相的方法及***
CN106786738A (zh) * 2016-12-23 2017-05-31 上海电力学院 基于svpwm和模糊pi的z源逆变器并网控制方法
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CN108365740A (zh) * 2018-04-12 2018-08-03 华北电力大学（保定） 一种电压型谐振逆变器并联的均流控制***
CN108736517B (zh) * 2018-06-14 2019-12-10 广西电网有限责任公司电力科学研究院 一种基于vsg的逆变型分布式电源自适应阻尼控制方法
CN112953290B (zh) * 2021-03-22 2024-06-11 淮阴工学院 一种孤岛微网中并联逆变器***鲁棒控制方法

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