【作者】 蔡惠红； 邱军； 林新春； 谭俊；

【Author】 Huihong Cai;Jun Qiu;Xinchun Lin;Jun Tan;The Energy and power company of WISCO;Huazhong University of Science and Technology;

【机构】 武钢股份能源动力总厂； 华中科技大学；

【摘要】 动态电压恢复器是一种串联型电压补偿装置,该装置能够在很短的时间内检测到电网电压跌落,然后输出一个补偿电压使负荷电压恢复到跌落前的状态。其中储能单元为动态电压恢复器提供补偿期间所需的能量,其成本也一定程度上限制了DVR的推广。首先,本文分析了现有DVR补偿策略对储能单元电压及容量的要求,并指出这三种补偿策略的优势与不足。在此基础上,本文提出了一种新的电压补偿策略。该策略综合了常见补偿策略的优点,通过在补偿过程中适时地切换补偿策略,保证在负荷电压不出现相位跳变的前提下,延长DVR补偿时间。然后,本文通过实验验证了该补偿策略的可行性与有效性。因此,在满足一定技术指标的前提下,该策略能更有效地利用直流储能,从而减小储能容量、降低整个装置的成本。更多还原

【Abstract】 Dynamic voltage restorer is a series connected voltage compensator. This device could quickly detect voltage sags and inject compensation voltages to restore the load voltage. The energy storage device, which provides the energy during the compensation, is an important part of the whole system, but its cost impedes the popularization of dynamic voltage restorer. Firstly, this paper analyzed the existing voltage compensation methods and found the advantages of each methods. Based on the comparisons, this paper proposed a improved compensation method, which synthesized the advantages of existing methods. The voltage compensation time of this method can be extended by translating the voltage compensation methods during the whole compensation process. Then, the proposed voltage compensation method is verified by experimental results. So this paper proposed a new voltage compensation method to utilize the energy more efficiently, and then reduces the capacity and cost of the dynamic voltage restorer.更多还原