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首页> 外文期刊>Journal of power electronics >A Novel Control Scheme for T-Type Three-Level SSG Converters Using Adaptive PR Controller with a Variable Frequency Resonant PLL
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A Novel Control Scheme for T-Type Three-Level SSG Converters Using Adaptive PR Controller with a Variable Frequency Resonant PLL

机译：T型三电平SSG转换器的新型控制方案，使用带有可变频率谐振PLL的自适应PR控制器

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摘要

In this paper, a novel quasi-direct power control (Q-DPC) scheme based on a resonant frequency adaptive proportional-resonant (PR) current controller with a variable frequency resonant phase locked loop (RPLL) is proposed, which can achieve a fast power response with a unity power factor. It can also adapt to variations of the generator frequency in T-type Three-level shaft synchronous generator (SSG) converters. The PR controller under the static alpha-beta frame is designed to track ac signals and to avert the strong cross coupling under the rotating d-q frame. The fundamental frequency can be precisely acquired by a RPLL from the generator terminal voltage which is distorted by harmonics. Thus, the resonant frequency of the PR controller can be confirmed exactly with optimized performance. Based on an instantaneous power balance, the load power feed-forward is added to the power command to improve the anti-disturbance performance of the dc-link. Simulations based on MATLAB/Simulink and experimental results obtained from a 75kW prototype validate the correctness and effectiveness of the proposed control scheme.
机译：本文提出了一种基于带有可变频率谐振锁相环（RPLL）的谐振频率自适应比例谐振（PR）电流控制器的准直接功率控制（Q-DPC）方案，该方案可以实现快速的具有统一功率因数的功率响应。它也可以适应T型三电平轴同步发电机（SSG）转换器中发电机频率的变化。静态alpha-beta框架下的PR控制器旨在跟踪交流信号并避免旋转d-q框架下的强交叉耦合。 RPLL可以精确地从发电机端电压获取基频，该发电机端电压会因谐波而失真。因此，可以以最佳性能准确确定PR控制器的谐振频率。基于瞬时功率平衡，将负载功率前馈添加到功率命令中，以改善直流母线的抗干扰性能。基于MATLAB / Simulink的仿真和从75kW原型获得的实验结果验证了所提出控制方案的正确性和有效性。

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