| 引用本文: | 卢林煜,王鲁杨,柏扬,陈超,李丽.面向能源互联网的固态变压器中双有源桥直流变换器研究[J].电力系统保护与控制,2019,47(6):141-150.[点击复制] |
| LU Linyu,WANG Luyang,BAI Yang,CHEN Chao,LI Li.Research on dual-active-bridge DC-DC converter in solid state transformer for energy internet[J].Power System Protection and Control,2019,47(6):141-150[点击复制] |
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| 摘要: |
| 针对双重移相控制固态变压器中非谐振式双有源桥直流变换器(Dual Active Bridge, DAB)传输轻载功率时，外移相的移相区间(Phase-Shift Interval, PSI)窄且内移相对外移相的扰动灵敏度(Disturbance Sensitivity, DS)高的问题，提出一种改进移相控制方法。首先，通过对比分析DAB在传统移相控制(Phase-Shift-Control, PSC)下的工作原理与功率传输特性，建立了各PSC间的内在联系。其次，根据改进双重移相控制方法的工作原理，划分了三种工作状态并对各工作状态下的模态进行了研究。然后，推导了各工作状态的传输功率并分析了其传输特性。理论分析表明，该方法相对于传统移相控制方法，能显著降低外移相对内移相的DS和对传输功率的冲击度，拓宽了内外移相量的PSI，同时提高了系统的功率传输效率。最后，通过仿真验证了所提方法的正确性和优越性。 |
| 关键词: 固态变压器 双有源桥直流变换器 移相区间 扰动灵敏度 移相控制 |
| DOI：10.7667/PSPC180494 |
| 投稿时间：2018-04-28修订日期：2018-07-20 |
| 基金项目:国家自然科学基金项目资助(51777120);上海绿色能源并网工程技术研究中心项目资助(13DZ2251900) |
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| Research on dual-active-bridge DC-DC converter in solid state transformer for energy internet |
| LU Linyu,WANG Luyang,BAI Yang,CHEN Chao,LI Li |
| (College of Electrical Power Engineering, Shanghai University of Electric Power, Shanghai 200090, China;State Grid Shanghai Electric Power Economic and Technology Research Instiute, Shanghai 200002, China;Dazu District Power Supply Branch, State Grid Chongqing Power Grid Company, Chongqing 402360, China) |
| Abstract: |
| A modified phase-shift-control method is proposed to solve the problem of narrow Phase-Shift Interval (PSI) and high Disturbance Sensitivity (DS) of inner phase shift to outer phase shift when non-resonant Dual Active Bridge DC-DC converter (DAB) in solid state transformer with dual-phase-shift control transmits light-load power. Firstly, by comparing and analyzing the operation principle and power transmission characteristics of DAB under the traditional Phase-Shift-Control (PSC), the intrinsic relationship among the PSCs is established. Secondly, according to the operation principle of the modified dual phase shift control method, three operation states are classified and the modes of each operation state are studied. Then, the transmission power of each operation state is deduced and its transmission characteristics are analyzed. The theoretical analysis shows that compared with the traditional PSC method, this method can significantly reduce the DS of inner phase shift to the outer phase shift and the impact on transmission power, broaden the PSI of inner and outer phase shift and improve the power transmission efficiency of the system. Finally, the correctness and superiority of the proposed method are verified by simulation. This work is supported by National Natural Science Foundation of China (No. 51777120) and Shanghai Engineering Research Center of Green Energy Grid-connected Technology (No. 13DZ2251900). |
| Key words: solid state transformer dual active bridge phase-shift interval disturbance sensitivity phase-shift-control |
