P. Jayarathna, S. Ediriweera, R. Samarasinghe, R. Lucas
{"title":"Modelling the lumped parameter network of a power transformer using sweep frequency response analysis","authors":"P. Jayarathna, S. Ediriweera, R. Samarasinghe, R. Lucas","doi":"10.1080/1448837x.2023.2206602","DOIUrl":"https://doi.org/10.1080/1448837x.2023.2206602","url":null,"abstract":"","PeriodicalId":34935,"journal":{"name":"Australian Journal of Electrical and Electronics Engineering","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76970658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sensorless Adaptive control of VSI-Fed Induction Motor Drive with Optimized MLP-Neural Network","authors":"S. Arya, Mahesh Pudari","doi":"10.1080/1448837X.2023.2206598","DOIUrl":"https://doi.org/10.1080/1448837X.2023.2206598","url":null,"abstract":"ABSTRACT Multilayer-Perceptron Neural Network (MLP-NN)-based sensorless speed control of adaptive Indirect Field-Oriented Control (IFOC) strategy is implemented for online parameter estimation of Induction Motor Drive (IMD) fed from Common mode voltage injection Space vector PWM (CVSVPWM) based Voltage Source Inverter. Harris Hawks Optimization (HHO) is implemented in this work, to train the MLP-NN model by choosing the optimal weight and biases for the estimation of accurate parameters and speed of IMD. The objective of optimal MLP-NN is to improve the IMD reliability and response fast during dynamic operation. The model performances are evaluated by employing statistical metrics of MSE, RMSE, MAE, MAPE, and R for training and testing. These are reported for testing to be 0.000602064, 0.0245, 0.4015, 0.25474, and 0.9997 which indicates the best-fitted prediction model and proves the minimized error. The results reveal that an optimized MLP-NN accomplishes promising performance in estimating the parameters and speed with the least errors such as rs is 3.82%, rr is 4.19%, ls is 0.41%, lr is 0.72%, lm is 0.21%, and strongly tracking of reference speed. In addition, HHO is also employed to evolve the gains of the PI-controller in adaptive-IFOC for generation of reference signals by reducing the computational effort.","PeriodicalId":34935,"journal":{"name":"Australian Journal of Electrical and Electronics Engineering","volume":"17 1","pages":"291 - 308"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87371077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Soukaina El Daoudi, Loubna Lazrak, Najib El Ouanjli
{"title":"New contributions for speed observation of asynchronous motor fed by multilevel inverter","authors":"Soukaina El Daoudi, Loubna Lazrak, Najib El Ouanjli","doi":"10.1080/1448837X.2023.2191830","DOIUrl":"https://doi.org/10.1080/1448837X.2023.2191830","url":null,"abstract":"ABSTRACT Control fulfilment of asynchronous motors requires accurate feedback of speed information. Previously, this function was attributed to mechanical sensors, however, due to the limited use restrictions, scientists have developed variety of speed observation algorithms. These latter are distinguished by their simplicity and sensitivity to machine parameter variations as well as their robustness even in a wide speed range. This paper proposes three new structures of observers in order to achieve an efficient behaviour at low and high speed. The first is a combined scheme of sliding mode observer and model reference adaptive system, the second consists in switching between the two aforementioned observers according to the operating speed, while the third consists in switching from sliding mode observer to the combined estimator. Moreover, the overall control scheme performance is enhanced by using sliding mode principle in a direct torque structure to control the motor fed by NPC multilevel inverter. Besides, a sliding mode controller is inserted in the external loop to regulate speed and provide a stable torque. To shed light on the efficiency of the proposed contributions, a critical and comparative study of simulation results has been conducted.","PeriodicalId":34935,"journal":{"name":"Australian Journal of Electrical and Electronics Engineering","volume":"23 1","pages":"279 - 290"},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82532864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation of different types of winding in counter-rotating double-rotor axial flux permanent magnet machines","authors":"Elham Rahimi Namaghi, H. Izadfar","doi":"10.1080/1448837X.2023.2187945","DOIUrl":"https://doi.org/10.1080/1448837X.2023.2187945","url":null,"abstract":"ABSTRACT The choice of the winding type has a significant effect on the performance characteristics of the machine, efficiency, weight of the required wire, ease of winding, etc. The purpose of this paper is to investigate the effect of winding type as well as the polarity of magnets on both sides of the stator core on the back electromotive force (Back-EMF) of the counter-rotating double-rotor axial flux permanent magnet generator (CRDR-AFPMG). The winding type influences the produced voltages of the generator. Hence, in this paper, several types of windings, such as the first type of shifted winding, the second type of shifted winding, and the independent winding are investigated to produce three voltages with the same amplitudes and 120 degrees of phase differences. However, it has been found that, among the studied windings, only the second type of shifted winding and independent winding produces three voltages with similar amplitudes and 120 degrees of phase difference. Finally, the suitable type of winding for the proposed machine will be determined, and the performance of the case study machine will be evaluated by finite element (FE) simulation. JMAG designer software is used for this purpose.","PeriodicalId":34935,"journal":{"name":"Australian Journal of Electrical and Electronics Engineering","volume":"24 1","pages":"269 - 278"},"PeriodicalIF":0.0,"publicationDate":"2023-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72630546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"CMOS compatible sinusoidal oscillator structures with explicit voltage and current outputs","authors":"Atul Kumar, B. Chaturvedi, J. Mohan","doi":"10.1080/1448837X.2023.2177334","DOIUrl":"https://doi.org/10.1080/1448837X.2023.2177334","url":null,"abstract":"ABSTRACT The paper presents two novel circuits of sinusoidal oscillator featuring single differential difference dual-X second-generation current conveyor (DD-DXCCII) based realisation. One of the presented circuits provides voltage output signal and employs one DD-DXCCII, two capacitors and two resistors. Another presented circuit offers current output signal and employs one DD-DXCCII, two capacitors and three resistors. Both the circuits use grounded capacitors only. The output signals of presented circuits are obtainable at suitable impedance terminals (voltage signal at low impedance terminal and current signal at high impedance terminal), therefore the presented oscillator circuits offer rich cascadability. The additional performance features such as good operating frequency (49 MHz), low total harmonic distortion (<1.16%) and low power consumption (2.5 mW) are available from the presented oscillator circuits. The non-ideal, parasitic and stability aspects of the circuits are also investigated. Furthermore, the proposed ideas are enriched by presenting their MOS-C equivalent structures. Thus proposed structures are well-liked CMOS compatible structures which are well-suited to IC implementation. The presented circuits are verified through simulation outcomes which are carried out using PSPICE tool with 0.18 μm technology parameters.","PeriodicalId":34935,"journal":{"name":"Australian Journal of Electrical and Electronics Engineering","volume":"17 1","pages":"251 - 268"},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80443329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Research on an Improved Convolutional Neural Network Fault Diagnosis Method for Exciter System","authors":"Jian-ming Weng, Xinqi Chen, Hongfang Liu, Yue Qiu, Hongyu Yang, Wenjie An","doi":"10.1080/1448837X.2023.2173865","DOIUrl":"https://doi.org/10.1080/1448837X.2023.2173865","url":null,"abstract":"ABSTRACT At present, China’s power grid has entered a new stage of ultra-high voltage, long-distance, large-capacity, large-unit, AC and DC hybrid interconnection grid, and the generator excitation system has an important impact on the stability of the power system. As the core component of the excitation system, the exciter plays a vital role in the safe operation of the excitation system. In view of the above problems, this paper proposes an improved CNN exciter fault diagnosis research method. To be able to learn more abundant fault features, this article first builds a dilated convolutions which is types of deep convolutional neural network (DCNN) to expand the receptive field of the convolution kernel. Then build the Pythagorean Spatial Pyramid Pooling Layer (PTSPP) to further enhance the feature information of the extracted samples. Finally, this article will generate two-dimensional matrix samples from the collected excitation voltage and excitation current signals for model training. The experimental results show that the proposed PTSPP-DCNN method has high classification accuracy in the fault diagnosis of the exciter system. The comparison results show that the fault classification accuracy of the proposed method is higher than other deep learning methods.","PeriodicalId":34935,"journal":{"name":"Australian Journal of Electrical and Electronics Engineering","volume":"52 3 1","pages":"226 - 234"},"PeriodicalIF":0.0,"publicationDate":"2023-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82444440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An improved Sliding Mode Observer for parameter estimation in induction motor drive with optimised gains","authors":"Mahesh Pudari, S. Arya, R. Arya","doi":"10.1080/1448837X.2023.2174110","DOIUrl":"https://doi.org/10.1080/1448837X.2023.2174110","url":null,"abstract":"ABSTRACT This paper represents the online parameter identification and continuous updating in the controller of Induction Motor Drives (IMD). The online measure of parameters improves the operation of the speed estimator, particularly nearer to the zero speed, and also computes the adaptive slip angular frequency. The parameter of speed estimation is performed by the improved Optimized Constant Rate Reaching Law (OCRRL)-based sliding mode observer (SMO), and electrical parameters of stator resistance, mutual inductance, and rotor time constant estimation is performed by Improved Adaptive SMO (IASMO). To enhance the monitoring reliability driven by parameter mismatches, an Online Parameter Estimation Control (OPEC) is presented. Lyapunov’s stability function is used to develop OPEC’s motor parameter adaptive rule. The conventional SMO suffers from the problem of higher chattering phenomena at the sliding surface, especially at very low and zero speeds. An improved OCRRL-based SMO dissolves this issue. Further, to enhance the performance by eliminating the time required for manual tuning of gains of observers in IASMO and PI controllers in Indirect Field Oriented Control (IFOC) are obtained by the Grey Wolf Optimization (GWO) technique. The effectiveness and performance of the proposed observers are tested and verified for possible operating conditions.","PeriodicalId":34935,"journal":{"name":"Australian Journal of Electrical and Electronics Engineering","volume":"50 1","pages":"235 - 250"},"PeriodicalIF":0.0,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77070341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Hankel norm performance of 2-D digital filters described by Roesser model with overflow arithmetic","authors":"M. Kumar, T. Dash","doi":"10.1080/1448837X.2023.2167266","DOIUrl":"https://doi.org/10.1080/1448837X.2023.2167266","url":null,"abstract":"ABSTRACT This paper is concerned with the problem of asymptotic stability with Hankel norm performance (HNP) of two-dimensional (2-D) digital filter characterised by Roesser model, where the 2-D system includes overflow nonlinearities and external interference or excitation of finite duration. The underlying nonlinearities cover the usual types of overflow arithmetic utilised in practice such as saturation, two’s complement, zeroing and triangular. To solve this problem, new sufficient criterion is proposed by employing quadratic 2-D Lyapunov function. The proposed criterion guarantees that the addressed system has 2-D HNP bound. This criterion can examine the unwanted memory effect (ME) reduction of 2-D interfered digital filters for past excitations. In the absence of external inputs, the asymptotic convergence of 2-D digital filters is established under the proposed criterion. The developed HNP criterion is in linear matrix inequality framework and, therefore, computationally tractable. In addition, the optimisation problem is formulated to obtain the minimum HNP of the 2-D interfered digital filter. To illustrate the effectiveness of the proposed criterion, a numerical example is provided. The criteria addressed in current paper can give a whole analysis framework for the unwanted MEs of filters.","PeriodicalId":34935,"journal":{"name":"Australian Journal of Electrical and Electronics Engineering","volume":"16 1","pages":"219 - 225"},"PeriodicalIF":0.0,"publicationDate":"2023-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87762212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Feature level fusion framework for multimodal biometric system based on CCA with SVM classifier and cosine similarity measure","authors":"Chetana Kamlaskar, A. Abhyankar","doi":"10.1080/1448837X.2022.2129147","DOIUrl":"https://doi.org/10.1080/1448837X.2022.2129147","url":null,"abstract":"ABSTRACT The multimodal biometric system using feature level fusion offers more accurate and reliable recognition performance than the unimodal system. But in practice, feature level fusion is challenging to perform when biometric modalities have heterogeneous and incompatible feature representation and enforce the final decision more confidently. One of the main concerns in the fusion of features is to drive the highly discriminatory representation amongst different biometric modalities. This paper aims to design a framework for an efficient feature level fusion based on canonical correlation analysis (CCA) with a support vector machine (SVM) classifier to get a highly discriminant and affine invariant fused feature vector. The principal component analysis (PCA) + CCA subspace approach is used to achieve dimensionality reduction and feature fusion in a coherent manner, This approach eliminates the need for a complex matcher/classifier design to process a fused feature vector and also reduces computational complexity. The experimental findings for the SDUMLA-HMT multimodal database demonstrate that CCA on the extracted feature sets of iris and fingerprint modalities results in reasonably better multimodal classification accuracy with a substantial reduction in the feature dimensions. Using SVM, we achieved a classification accuracy of 100%. In this paper furthermore, three different distance measures are explored to test the efficacy of the proposed CCA-based feature level fusion approach. The best recognition performance is achieved in terms of an equal error rate (EER) of 0.176% for the cosine similarity measure. We also compared the proposed approach with the match score level fusion method. The proposed feature level fusion approach excels the recognition performance in contrast to the other literature approaches.","PeriodicalId":34935,"journal":{"name":"Australian Journal of Electrical and Electronics Engineering","volume":"7 1","pages":"205 - 218"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82821335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mal-operation analysis of LCC-HVDC protection schemes in simulation studies due to inaccurate transmission line modelling","authors":"F. D. Marvasti, A. Mirzaei","doi":"10.1080/1448837X.2022.2092997","DOIUrl":"https://doi.org/10.1080/1448837X.2022.2092997","url":null,"abstract":"ABSTRACT Protection in HVDC transmission lines, considering the significant amount of energy being transferred, has an undeniable importance on integrity of power systems. Due to unavailability of real HVDC transient data for protection studies, accurate modelling of HVDC systems through simulation software is the most practical alternative. One crucial part of a detailed transient simulation study is accurate line modelling, which, if not performed properly, can invalidate the results and conclusions. Therefore, in this study, three of the most accepted line models, namely the frequency-dependent, Bergeron and -section line models, will be discussed, and their impact on the performance of some of the most accepted HVDC protection methods will be investigated. In comparison to the frequency-dependent line model, which produces the most accurate response, other line models are such inaccurate that their responses in simulation studies are not usable for designing a reliable protection scheme. The simulation study shows that some of the distance or boundary protection methods, designed based on integrating a Bergeron or -section line model into their studies, can be completely unreliable. The validity of these claims is assessed based on the modified bipolar version of the CIGRE HVDC test system, simulated in the PSCAD/EMTDC software.","PeriodicalId":34935,"journal":{"name":"Australian Journal of Electrical and Electronics Engineering","volume":"45 1","pages":"407 - 416"},"PeriodicalIF":0.0,"publicationDate":"2022-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85572357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}