内容概要：本文详细介绍了基于PSIM平台搭建的48V90A移相全桥开关电源的数字控制仿真模型。该电源采用移相全桥拓扑结构和中心抽头整流，输入电压为400V，输出稳定在48V/90A。文中重点讨论了恒压环和限流环的闭环控制系统的设计与实现，包括移相角控制、PID调节以及滞回比较机制的应用。此外，还探讨了数字控制带来的挑战如采样延迟，并提出了相应的解决方法，如预测补偿和前馈控制。最终，通过动态响应测试验证了系统的性能。 适合人群：电力电子工程师、从事开关电源设计的研究人员和技术爱好者。 使用场景及目标：适用于需要深入了解移相全桥开关电源数字控制原理及其仿真实现的人群。目标是掌握移相全桥电源的工作机制、数字控制策略以及优化技巧。 其他说明：文中提供了部分关键代码片段（如移相角调整、电流模式切换）供读者参考，有助于理解和实践数字控制的具体实现。同时强调了仿真过程中需要注意的问题，如避免数值溢出、确保系统稳定性等。

ABSTRACT —— Unbalanced grid voltage sags are the severe challenge for wind power generation system which connected to the grid successfully. The dc bus voltage and output power will fluctuate under unbalanced grid voltage. Moreover, the voltage sags will lead to the increase of peak current, which will bring potential safety hazards to the operation of wind power system. This paper proposes a simple current limiting control scheme without auxiliary equipment, which based on the detailed analysis of the excessive peak current. In this scheme, the machine side converter (MSC) controller adjusts the electromagnetic power according to the power transmitted to the grid by the grid side converter (GSC). Meanwhile, it converts the unbalanced power on the dc-link into the rotor kinetic energy, avoiding the dc-link overvoltage. The GSC controller can not only ensure that the three-phase inverter currents are in the maximum safe range that the converters can bear, but also provide reactive power support for the grid. Furthermore, the fluctuations on dc bus voltage and output power can be eliminated effectively by using the GSC controller. The feasibility of the proposed scheme and the superiority over the traditional control schemes have been verified by simulations under different types of unbalanced voltage.

行业-电子政务-具有限流控制功能的蓄电池逆变系统及其限流控制方法.zip