一种新型能量回馈并网系统的设计与应用  

Design and application of new grid-connected energy regenerative system

作　　者：苏祥伟[1] 贾爱民[1] 吕晓东 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]杭州浙大太阳电气有限公司,浙江杭州310027

出　　处：《机电工程》2011年第9期1140-1143,共4页Journal of Mechanical & Electrical Engineering

基　　金：浙江省科技厅公益技术研究资助项目(2009C31043)

摘　　要：针对传统电梯采用制动电阻耗能方式所造成的能量浪费的问题,设计了一种新型能量回馈并网系统。开展了新型能量回馈并网系统的结构、工作原理及应用领域的分析,并在传统的三相桥式电路结构的基础上,通过软件锁相环和直流电压外环与并网电流内环组成的双闭环调节器,实现了对电网的能量回馈控制。为了提高直流电压利用率,拓展系统的适用环境,将空间矢量脉宽调制(SVPWM)控制策略应用到系统中。设计并搭建的22 kW新型能量回馈并网系统成功地应用于电梯上并进行相关的实验研究。实验结果表明,系统运行效率高达97%,并网电流THD低至3.2%,并具有良好的动态特性,在实际应用中系统工作稳定、节电效果显著。Aiming at the loss of energy of the traditional elevator,which using brake resistor,a new grid-connected energy regenerative system was designed.The new grid-connected energy regenerative system,including its structure,working principle and application field,was comprehensively analyzed and investigated.Based on traditional three-phase bridge circuit and double closed-loop control algorithm,the control of grid-connected energy regenerative system was carried out.Further more,in order to improve the DC voltage availability and expand the applicable scope of the system,the space vector pulse width modulation algorithm was adopted.At last,a 22 kW grid-connected energy regenerative system was designed and built,and was successfully applied to the OTIS elevator.The experimental results show that the current THD is low to 3.2%,and the system efficiency reaches as high as 96% with better dynamic response.In the practical application,the system is robust and energy saving effect is remarkable.

关 键 词：能量回馈 并网 空间矢量脉宽调制 直流电压利用率 总谐波失真 

分 类 号：TM464[电气工程—电器] TE08[石油与天然气工程]