Abstract：Back-to-back starting is a traditional starting method for large-capacity synchronous motors, but it needs two additional physical machines, and the operation process is quite complex. In order to solve this problem, a modified back-to-back starting approach for large-capacity synchronous motors based on virtual synchronous generator (VSG) technology is proposed in this paper. The cascaded H-bridge converter (CHB) controlled as a VSG is used to replace the prime mover and synchronous generator of conventional system. In the new starting system, the problems of original system are solved, and the initial relative angle between the machines and the damping torque of VSG become controllable. Furthermore, the added sensorless speed controller makes the speed controlled more accurate. The feasibility of promoting the growth of mechanical torque or retarding the growth of damping torque to accelerate the starting process is also studied when considering the system stability. The effectiveness of the proposed modified back-to-back starting method is verified by the hardware-in-loop experimental results.
陶亮, 孙建军, 查晓明, 宫金武. 基于虚拟同步发电机技术的改进型背靠背起动方法[J]. 电工技术学报, 2020, 35(zk2): 413-420.
Tao Liang, Sun Jianjun, Zha Xiaoming, Gong Jinwu. A Modified Back-to-Back Starting Method Based on Virtual Synchronous Generator Technology. Transactions of China Electrotechnical Society, 2020, 35(zk2): 413-420.
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2020, Vol. 35 
