[1]张 华,周 波,丁理杰,等.基于电压前馈的输入串联输出并联型直流变压器反下垂 控制策略[J].高压电器,2019,55(09):10-17.[doi:10.13296/j.1001-1609.hva.2019.09.002]
 ZHANG Hua,ZHOU Bo,DING Lijie,et al.Inverse-droop Control Scheme with Voltage Feedforward for Input Series Output Parallel Connected DC Solid State Transformer[J].High Voltage Apparatus,2019,55(09):10-17.[doi:10.13296/j.1001-1609.hva.2019.09.002]
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基于电压前馈的输入串联输出并联型直流变压器反下垂 控制策略()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第55卷
期数:
2019年09期
页码:
10-17
栏目:
直流变压器专题
出版日期:
2019-09-10

文章信息/Info

Title:
Inverse-droop Control Scheme with Voltage Feedforward for Input Series Output Parallel Connected DC Solid State Transformer
作者:
张 华 周 波 丁理杰 李 鑫
(国网四川电科院, 成都 610000)
Author(s):
ZHANG Hua ZHOU Bo DING Lijie LI Xin
(State Grid Sichuan Electrical Power Research Institute, Chendu 610000, China)
关键词:
双有源全桥DC-DC变换器 直流变压器 输入串联输出并联 反下垂控制 均压 控制
Keywords:
dual active bridge DC-DC converters DC solid state transformer input-series-output-parallel inverse-droop control input voltage sharing
DOI:
10.13296/j.1001-1609.hva.2019.09.002
摘要:
以双有源全桥(dual active bridge,DAB)DC-DC变换器为基本功率单元的输入串联 输出并联(input-series-output-parallel,ISOP)型直流变压器(DC solid state transformer,DCSST)十分适用于直流电网互联或大规模新能源汇集等高压大容量应用场合。 文中针对现有的反下垂控制方法无法兼顾均压/均流特性与输出电压调整率的缺点,提出了一 种电压前馈的反下垂控制方法。通过引入输入电压均值前馈实现了直流变压器输入电压与输出 电压的解耦,使得直流变压器在实现均压/均流运行的同时,具有较好的稳压性能。最后,于 PSCAD/EMTDC仿真软件搭建了以DAB变换器为基本功率单元的三单元ISOP型直流变压器仿真模型 ,对所提出的算法进行了对比实验验证。实验结果表明:该方法可以实现直流变压器各模块的 传输功率平衡,同时具有较好的稳压性能。
Abstract:
The input-series-output-parallel(ISOP) connected DC solid state transformer(DCSST)with dual active bridge(DAB)DC-DC converter as the basic power module is very suitable for high voltage and high power applications such as interconnection of DC grid or large-scale new energy convergence. This paper proposes an inverse-droop control scheme with voltage feed-forward to solve the main problem of the traditional inverse-droop control scheme that cannot take into account the input voltage/output current sharing and the output voltage regulating performance. By introducing input voltage mean feed-forward, the input voltage and output voltage of DCSST is decoupled, which makes DCSST have better voltage stabilization performance while realizing voltage/current sharing. Finally, an ISOP connected DCSST consisting of three DAB cells is built in PSCAD/EMTDC to verify the correctness and effectiveness of proposed scheme. Experimental results show that the proposed control scheme can not only balance the transferring power of each cell in DCSST, but also have excellent voltage stabilization performance.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-06-17; 修回日期:2019-08-21张 华(1985—),男,高级工程师,主要研究方向为电力系统安全稳定分析与控制。 周 波(1989—),男,工程师,主要研究方向为新能源发电机组接入安全稳定分析与控制。
更新日期/Last Update: 2019-09-10