In this article, we propose a predictive model technique based on combined control for distributed generation unit (DGU) driven by the uncontrolled prime mover. The DGU constitutes of a permanent magnet synchronous generator, along with back-to-back converter, and is operated to supply distributed load at fixed voltage and frequency. The model predictive control is developed by using two cost functions for the generator- and load-side converters simultaneously. The cost function for the generator-side converter is generated in the synchronously rotating reference frame, whereas the load side is developed in the stationary reference frame. The cost functions are developed to maintain the power flow from the generator at the desired level of demand throughout the operation. The proposed controller identifies the switching state of the converters without using the pulsewidth modulation modulator. The DGU is, thus, controlled to maintain the load voltage and frequency, irrespective of the uncontrolled variation of the load impedance and speed of the prime mover. Additionally, the controller is tested with the variation of the active power component of the load voltage and deviation in the dc-link voltage. The implementation of the proposed control is performed in the simulation environment successfully. The experimental results are presented to validate the theoretical performances in a scaled laboratory prototype.

中文翻译：

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基于模型预测技术的PMSG分布式机组组合控制性能分析

在本文中，我们提出了一种基于组合控制的预测模型技术，用于由不受控制的原动机驱动的分布式发电机组 (DGU)。DGU 由永磁同步发电机和背对背转换器组成，用于以固定电压和频率为分布式负载供电。模型预测控制是通过同时使用发电机侧和负载侧转换器的两个成本函数来开发的。发电机侧变流器的成本函数在同步旋转参考系中生成，而负载侧在静止参考系中生成。开发成本函数是为了在整个运行过程中将来自发电机的功率流保持在所需的需求水平。建议的控制器在不使用脉宽调制调制器的情况下识别转换器的开关状态。因此，无论负载阻抗和原动机速度的不受控制的变化如何，都可以控制 DGU 以保持负载电压和频率。此外，控制器还通过负载电压的有功功率分量的变化和直流母线电压的偏差进行测试。在仿真环境中成功执行了所提出的控制。实验结果用于验证规模化实验室原型的理论性能。与原动机的负载阻抗和速度的不受控制的变化无关。此外，控制器还通过负载电压的有功功率分量的变化和直流母线电压的偏差进行测试。在仿真环境中成功执行了所提出的控制。实验结果用于验证规模化实验室原型的理论性能。与原动机的负载阻抗和速度的不受控制的变化无关。此外，控制器还通过负载电压的有功功率分量的变化和直流母线电压的偏差进行测试。在仿真环境中成功执行了所提出的控制。实验结果用于验证规模化实验室原型的理论性能。