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Voltage and frequency control of standalone wind-driven self-excited reluctance generator using switching capacitors
Journal of Electrical Systems and Information Technology Pub Date : 2021-03-23 , DOI: 10.1186/s43067-021-00030-1
Joseph S. Sedky , Haitham M. Yassin , H. H. Hanafy , Farouk Ismail

This paper presents a methodology for voltage and frequency (V–f) control of a standalone wind-driven self-excited reluctance generator (WDSERG). The methodology is based on proposing two different compensation configurations using two switching capacitors (short-shunt and long-shunt compensation) for (V–f) control. The dynamic and steady-state performances of the two configurations are discussed under different operating conditions: wind speeds, load currents and power factors. This analysis is done by developing a complete dynamic model of WDSERG including the excitation capacitors and load. Therefore, complete equivalent circuits are proposed. The values of capacitors are controlled by adjusting the duty cycle of H-bridge circuits with PI controllers. To validate the proposed configurations and their dynamic models and equivalent circuits, simulation results for a 1.5-kW standalone WDSERG and experimental results for 0.2 kW reluctance generator driven by a DC motor, emulating the wind turbine, are carried out. The results show a significant enhancement in voltage and frequency regulation with the selected optimal capacitances for each configuration; however, short-shunt compensation is the preferred configuration as it controls the output voltage and frequency with minimum values of capacitances and minimum required duty variation.

中文翻译:

使用开关电容器的独立式风力自励磁阻发电机的电压和频率控制

本文介绍了一种用于独立风驱动自励磁阻发电机(WDSERG)的电压和频率(V–f)控制的方法。该方法基于提出两种不同的补偿配置,其中使用两个开关电容器(短并联和长并联补偿)进行(V–f)控制。讨论了两种配置在不同运行条件下的动态和稳态性能:风速,负载电流和功率因数。通过开发完整的WDSERG动态模型(包括激励电容器和负载)来完成此分析。因此,提出了完整的等效电路。通过使用PI控制器调整H桥电路的占空比来控制电容器的值。为了验证建议的配置及其动态模型和等效电路,进行了1.5千瓦独立式WDSERG的仿真结果,以及由直流电动机驱动的0.2 kW磁阻发电机的仿真结果,模拟了风力涡轮机。结果表明,为每种配置选择了最佳电容后,电压和频率调节有了显着提高。但是,短并联补偿是首选配置,因为它以最小的电容值和所需的最小占空比变化来控制输出电压和频率。
更新日期:2021-03-23
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