| 引用本文: | 杨振宇,许 胜,许杏桃.高压大容量D-STATCOM主电路的比较与分析[J].电力自动化设备,2011,31(6): |
| YANG Zhenyu,XU Sheng,XU Xingtao.Comparison and analysis of high-voltage large-capacity D-STATCOM main circuit[J].Electric Power Automation Equipment,2011,31(6): |
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| 摘要: |
| 分析了现有典型高压大容量D-STATCOM的电路结构，特别比较了链式结构中△链和Y链各自的优劣。构建了一种背靠背H桥链节的Y链主电路，该结构具有能量可双向流动、链节直流电压由整流H桥单独控制、便于采用n + 1冗余策略及便于高压大容量扩展等优点。给出了基于αβ坐标变换的Ip - Iq电流型补偿策略和故障链节旁路的容错控制，以及故障链节旁路后避免不同相之间的最小采样间隔的CPS-SPWM的调整算法。对5链节串联1.14 kV／100 kV·A样机进行了不对称负荷补偿实验和故障链节旁路容错实验，实验结果验证了所提结构和控制算法的正确性和有效性。 |
| 关键词: D-STATCOM Y链 中性点偏移 故障容错 |
| DOI： |
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| 基金项目:基金项目：江苏省电力公司重点科技项目（J2008057，J2009023） |
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| Comparison and analysis of high-voltage large-capacity D-STATCOM main circuit |
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YANG Zhenyu1,2, XU Sheng3, XU Xingtao4
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1.Production & Technology Department，Jiangsu Electric Power Company，Nanjing 210024，China;2.Substation Operation Center，Changzhou Power Supply Company，Changzhou 213003，China;3.School of Matter Network Engineering，Jiangnan University，Wuxi 214122，China;4.Jiangsu Anfi Electric Technology Co.，Ltd.，Taizhou 225300，China
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| Abstract: |
| The circuit structure of present high-voltage large-capacity D-STATCOM is analyzed and the features of link structure are compared between △-type and Y-type. A Y-type back-to-back H-bridge inverter is constructed，which has some advantages：bidirectional energy flow，DC-link voltage controlled individually by H-rectifier，adaptive to n + 1 redundancy，easy extension to high-voltage and large-capacitance，etc. The Ip - Iq current compensation strategy based on α-β coordinates conversion，the fault-tolerant control of faulty link bypass and its correlative CPS-SPWM adjustment algorithm to avoid the minimum sampling interval between different phases are proposed. The asymmetric load compensation experiment and the link-bypass fault-tolerance experiment are carried out with a 1.14 kV／100 kV·A prototype of 5 serial links and the experimental results testify the validity and effectiveness of the proposed structure and algorithm. |
| Key words: D-STATCOM Y-cascade neutral point shift fault tolerance |
