大容量单相逆变装置并联技术的分析

HT-7U全超导Tokamak核聚变实验装置等离子体环在垂直位移方向上有着固有的不稳定性。为了实现垂直位移方向上的稳定，给主动控制线圈供电的功率放大器的响应速度必须具有快速性。根据实验装置对功率放大器提出的要求，此功率放大器技术属于低电压、大电流的单相逆变电源装置。为此该文提出一种基于非隔离模式单相逆变装置并联技术的拓扑结构，不仅能够实现单相逆变器在异步控制模式下的积木化操作，而且通过合理地选择输入电源的组数，实现冗余技术，提高系统的效率和可靠性。最后通过Pspice8．0仿真和小功率的台面实验，证明此方案是可行的。

ANALYSIS OF PARALLEL SINGLE-PHASE INVERTERS OF LARGE CAPACITY

The vertical position of plasma in the HT-7U Tokamak is inherently unstable. In order to realize a stabilization system, the response rate of the power amplifier feeding the stabilization coils must be fast enough. In terms with the amplifier parameter requirements, research field belongs to single-phase inverters with low voltage and high current. This paper presents a circuit topology about parallel single-phase inverters based on the non-isolation mode. The topology not only can operate building blocks with non-synchronized control, but also realize redundancy to improve the system's efficiency and reliability by choosing the numbers of the input power supply reasonably. Finally, simulation and small power experiment results show that the proposed scheme is feasible and suitable.