Belalia Karim, Mostefa Abdelkader, Merabet Boulouiha Houari, Draou Azeddine, Denai Mouloud
Department of Electrical Engineering and Automation, University of Relizane, Relizane, Algeria; Laboratory SCAMRE, National Polytechnic School of Oran-Maurice Audin, Oran, Algeria.
Laboratory SCAMRE, National Polytechnic School of Oran-Maurice Audin, Oran, Algeria.
ISA Trans. 2024 Dec;155:237-260. doi: 10.1016/j.isatra.2024.10.012. Epub 2024 Oct 19.
Recent studies have shown that electrical systems in wind power conversion are subject to a 67 % failure rate, and conventional three-phase generators are considered to be the most sensitive to these faults. Induction generator current harmonics are a major source of torque ripples causing acoustic noise and vibrations. These ripples can progressively increase under faulty operating conditions. In six-phase machines, there is appearance of high harmonic currents in the air gap as space harmonics. Power electronic converters are also subject to faults, the most common being Short-Circuit (SC) and Open-Circuit (OC) faults. SC faults cause large peaks in the line currents, which trigger the protection devices, resulting in a complete shutdown of the production system. OC faults, on the other hand, cause imbalances in the phases, but the system remains in operation. Direct Torque Control (DTC) based on Space Vector Modulation (SVM) at constant switching frequency is an effective solution to tackle induction generator current harmonics. This paper proposes a DTC combined with a Proportional Integral Fuzzy Logic Controller (PIFLC) optimized by Particle Swarm Optimization (PSO) in order to overcome the problems of torque ripples. Furthermore, using Vector Space Decomposition (VSD) and the Modified Space Vector Pulse Width Modulation (MSVPWM) strategy, a significant reduction of harmonics in the air-gap can be achieved. Simulations were carried out under MATLAB/Simulink, and the results obtained demonstrate the superiority of the proposed DTC-PIFLC-PSO controller in terms of robustness against wind speed variations and under faulty switch conditions in the power converter of the Dual Star Induction Generator (DSIG) generator. In addition, a comparative study with the classical PI controller is presented to show the effectiveness of the DTC-PIFLC-PSO controller against faults with a significant reduction in the Total Harmonic Distortion (THD) during both faulty and non-faulty conditions.
最近的研究表明，风力发电转换中的电气系统故障率为67%，传统的三相发电机被认为对这些故障最为敏感。感应发电机电流谐波是导致噪声和振动的转矩脉动的主要来源。在故障运行条件下，这些脉动会逐渐增加。在六相电机中，气隙中会出现作为空间谐波的高谐波电流。电力电子变换器也容易出现故障，最常见的是短路（SC）和开路（OC）故障。短路故障会导致线路电流出现大的峰值，从而触发保护装置，导致生产系统完全停机。另一方面，开路故障会导致各相不平衡，但系统仍能运行。基于空间矢量调制（SVM）且开关频率恒定的直接转矩控制（DTC）是解决感应发电机电流谐波的有效方法。本文提出一种结合比例积分模糊逻辑控制器（PIFLC）并通过粒子群优化（PSO）进行优化的直接转矩控制，以克服转矩脉动问题。此外，使用矢量空间分解（VSD）和改进的空间矢量脉宽调制（MSVPWM）策略，可以显著降低气隙中的谐波。在MATLAB/Simulink环境下进行了仿真，所得结果证明了所提出的DTC-PIFLC-PSO控制器在应对风速变化的鲁棒性以及双星感应发电机（DSIG）发电机功率变换器中开关故障情况下的优越性。此外，还与经典PI控制器进行了对比研究，以表明DTC-PIFLC-PSO控制器在故障和非故障情况下对故障的有效性，总谐波失真（THD）显著降低。
