Nonlinear adaptive normalized least mean absolute third algorithm for the control of five-level distribution static compensator,International Journal of Circuit Theory and Applications

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Nonlinear adaptive normalized least mean absolute third algorithm for the control of five-level distribution static compensator
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2021-05-05 , DOI: 10.1002/cta.3045
Praveen Bansal ₁ , Alka Singh ₁

Affiliation

This paper presents the design and control of single-phase five-level cascaded H-bridge multilevel inverter (CHB-MLI) as a shunt active power filter (SAPF) unit to mitigate the various power quality (PQ) problems such as reactive power burden, injection of harmonics in the supply, poor power factor, and so on. The control of CHB-MLI has been done using the normalized least mean absolute third (NLMAT) algorithm, which overcomes the shortcoming of conventional least mean square (LMS), normalized LMS (NLMS), and least mean absolute third (LMAT) algorithm. The control algorithm is designed in MATLAB Simulink, and its scaled down prototype model is developed in the laboratory to find the fundamental active component of load current and to mitigate the aforementioned PQ problems. The proposed system is tested for single-phase grid-connection, and it works satisfactorily under steady state and dynamic load conditions. A dSpace1104 microcontroller is used to test the proposed algorithm and to generate firing pulses. Besides, the detailed comparison in the context of mean square error (MSE), weights convergence and intermediate error with conventional LMS, NLMS, and LMAT algorithm have also been discussed. Moreover, the harmonic distortion observed in the source current is within stipulated IEEE-519 limits.

中文翻译：

五级分布静态补偿器控制的非线性自适应归一化最小均值绝对三次算法

本文介绍了单相五电平级联 H 桥多电平逆变器 (CHB-MLI) 作为并联有源电力滤波器 (SAPF) 单元的设计和控制，以减轻各种电能质量 (PQ) 问题，如无功功率负担、电源中注入谐波、功率因数差等。CHB-MLI 的控制采用归一化最小均方绝对三次 (NLMAT) 算法完成，克服了传统最小均方 (LMS)、归一化 LMS (NLMS) 和最小均值绝对三次 (LMAT) 算法的缺点。控制算法在 MATLAB Simulink 中设计，其缩小的原型模型在实验室中开发，以找到负载电流的基本有源分量并缓解上述 PQ 问题。所提出的系统经过单相电网连接测试，它在稳态和动态负载条件下工作令人满意。dSpace1104 微控制器用于测试所提出的算法并生成触发脉冲。此外，还讨论了与传统 LMS、NLMS 和 LMAT 算法在均方误差 (MSE)、权重收敛和中间误差方面的详细比较。此外，在源电流中观察到的谐波失真在 IEEE-519 规定的限制范围内。

更新日期：2021-05-05

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