直流配电网中高频链直流变压器的电压平衡控制策略研究

发布时间：2018-04-29 20:54

本文选题：直流配电网 + 高频链　；参考：《中国电机工程学报》2016年02期

【摘要】：直流变压器作为直流配电网中的关键设备可有效实现高低压直流配电母线的电压变换和功率管理。该文主要针对基于双主动全桥的高频链直流变压器(DC solid state transformer,DCSST)的直流电压平衡控制策略进行了系统研究,尤其是对DCSST的高电位取电的自励控制电源对串联电压特性的影响进行了深入分析。在此基础上,该文提出了待机闭锁状态的最低电压追踪控制方法,该方法结合运行解锁状态的附加电压环的控制方法一起,可以有效解决直流配电网中DCSST从启动充电、待机闭锁到运行解锁等全运行状态下的直流电压平衡控制问题。物理样机实验结果证明了文中所提控制策略的正确性和有效性。
[Abstract]:As a key equipment in DC distribution network, DC transformer can effectively realize voltage conversion and power management of high and low voltage DC distribution busbar. In this paper, the DC voltage balance control strategy of DC solid state DC SST based on double active full bridge is studied systematically. In particular, the effect of self-excitation control power supply with high potential on the series voltage characteristics of DCSST is analyzed. On this basis, this paper presents a minimum voltage tracking control method for standby latch-up state. This method, combined with the control method of additional voltage loop running in unlocked state, can effectively solve the problem of DCSST slave charging in DC distribution network. DC voltage balance control under full operation condition such as standby lock to operation unlock. The experimental results of physical prototype show that the proposed control strategy is correct and effective.
【作者单位】：华北电力大学电气与电子工程学院;电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);
【基金】：国家863高技术基金项目(2013AA050104)~~
【分类号】：TM41;TM721.1

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