V. Pires, D. Foito, A. Pires, A. Cordeiro, J. Martins
{"title":"An 8/6 SRM Drive with a Multilevel Topology Based on a Cross-Switched Configuration","authors":"V. Pires, D. Foito, A. Pires, A. Cordeiro, J. Martins","doi":"10.1109/CPE-POWERENG48600.2020.9161473","DOIUrl":"https://doi.org/10.1109/CPE-POWERENG48600.2020.9161473","url":null,"abstract":"SRM drives based on multilevel power electronic converter presents several advantages, like reducing the switching frequency and improve the operation of the motor under high speed. In this way, several multilevel power converter topologies have been developed for the SRM drives. In line with this, this paper proposes a new multilevel power converter topology for the 8/6 SRM drive. The topology was developed with the purpose to reduce the number of power semiconductors, without reducing the performance of the motor. The proposed topology was designed in a way that uses crossover switches. The operation of the power converter topology in all of their modes is analyzed in a detailed way. The verification of the global system performance (drive and motor) is realized by the implementation of simulation studies. Indeed, through these studies it is verified that at low speed operation the switching frequency is reduced, but maintaining the application of the maximum voltage during the magnetization and demagnetization process.","PeriodicalId":111104,"journal":{"name":"2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)","volume":"25 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133043148","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}
Roya Ahmadiahangar, E. Azizi, Subham S. Sahoo, Tobias Häring, A. Rosin, D. Vinnikov, T. Dragičević, M. H. Hamidi Beheshti, F. Blaabjerg
{"title":"Flexibility investigation of price-responsive batteries in the microgrids cluster","authors":"Roya Ahmadiahangar, E. Azizi, Subham S. Sahoo, Tobias Häring, A. Rosin, D. Vinnikov, T. Dragičević, M. H. Hamidi Beheshti, F. Blaabjerg","doi":"10.1109/CPE-POWERENG48600.2020.9161667","DOIUrl":"https://doi.org/10.1109/CPE-POWERENG48600.2020.9161667","url":null,"abstract":"the amount of renewable energy sources (RES) in the energy production share is permanently increasing, turning them into a vital alternative energy source for the grid. Due to their volatile power production because of e.g. fluctuating wind or solar irradiance, it is one of the main challenges to integrate PV systems and other renewables into power systems (PS) without causing stability issues. Exploiting the flexibility of microgrids is one method for balancing energy production and demand, which has mostly been investigated for AC- but not DC microgrids. Therefore, this paper presents a novel approach to utilize the flexibility in a DC microgrid cluster. A fuzzy logic controller was used to control the battery storage systems of the microgrids to achieve flexibility without violating the consumers’ privacy or comfort. Simulation results show the effectiveness of the proposed method.","PeriodicalId":111104,"journal":{"name":"2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131091900","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":"DC Capacitor Testing Capability Intrinsic to Multi-leg Converters","authors":"M. Nemec, V. Ambrožič, Andraž Rihar, P. Zajec","doi":"10.1109/CPE-POWERENG48600.2020.9161692","DOIUrl":"https://doi.org/10.1109/CPE-POWERENG48600.2020.9161692","url":null,"abstract":"This paper investigates the possibility of DC-link capacitor testing in multi-leg converters. Operating conditions similar to ones expected in normal operation can be achieved with the circular power flow, which is possible in multi-leg converters. Two cases are considered. The first one is DC/DC buck converter and second one is dual three-phase drive. Based on simulation results it can be asserted that regenerative/synthetic load can be comparable to normal load with proper setup of operational parameters.","PeriodicalId":111104,"journal":{"name":"2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124862979","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":"Intelligent systems applied to buildings' management","authors":"R. Pereira, F. Barata, C. Viveiros","doi":"10.1109/CPE-POWERENG48600.2020.9161688","DOIUrl":"https://doi.org/10.1109/CPE-POWERENG48600.2020.9161688","url":null,"abstract":"Energy efficiency in buildings are an important domain regarding its impact in the global energy consumption. Several efficiency measures are currently available, using different methodologies. In this paper an approach using intelligent systems is implemented through a smart controller able to automatically and efficiently manage building’s energy. This smart controller uses Fuzzy Logic Control (FLC) as a decision maker and is supported by Artificial Neural Networks (ANN) used to forecast the building outside temperature. In addition, and in order to increase overall energy efficiency, renewable energies associated with a storage system are considered. For the designed smart controller implementation, a thermal house model is simulated using a MATLAB toolbox. In this paper emphasis is given to the building´s Heating Ventilation and Air Conditioning (HVAC) control and a rough economic analysis is drawn, allowing to infer about the adopted efficiency measures impact.","PeriodicalId":111104,"journal":{"name":"2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128625578","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":"Low-Cost Embedded Measurement System for Power Quality Frequency Monitoring","authors":"Nuno M. M. Rodrigues, F. Janeiro, P. Ramos","doi":"10.1109/CPE-POWERENG48600.2020.9161673","DOIUrl":"https://doi.org/10.1109/CPE-POWERENG48600.2020.9161673","url":null,"abstract":"Power quality (PQ) analysis involves the measurement of quantities that characterize the power grid. However, since traditional monitoring equipment is expensive, the measurements are typically performed at few selected locations, not on a regular basis and typically to address customer or grid problems. Recent advances in power electronics combined with the increasing penetration of renewable energies have increased the need for cheaper and portable power quality devices. One of the key parameters in power quality assessment is the power grid frequency since many of the other PQ parameters depend on the power grid frequency. The method suggested in IEC 61000-4-30 to measure the power grid frequency is to count the number of zero crossings in the voltage waveform that occur during a known time interval. In this paper, a new electrical power grid frequency estimation algorithm based in selected calculation of frequency components using the Goertzel algorithm and implemented in a low-cost STM-32 development board is presented. The proposed solution is suited for wide deployment in a smart grid for comprehensive power grid monitoring.","PeriodicalId":111104,"journal":{"name":"2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123653342","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":"Renewable Energy and Energy Storage Technologies","authors":"","doi":"10.1109/cpe-powereng48600.2020.9161674","DOIUrl":"https://doi.org/10.1109/cpe-powereng48600.2020.9161674","url":null,"abstract":"","PeriodicalId":111104,"journal":{"name":"2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123794188","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":"Discrete Polynomial Resonant Current Controller for a Single-Phase VSC Connected to the Grid using an LCL Filter","authors":"C. Ramos, A. Martins","doi":"10.1109/CPE-POWERENG48600.2020.9161694","DOIUrl":"https://doi.org/10.1109/CPE-POWERENG48600.2020.9161694","url":null,"abstract":"This paper proposes a new design method to control the currents of Single-Phase Voltage Source Converters tied to the power grid using an LCL filter. The controller is designed in the discrete domain using the polynomial technique and a resonant block to achieve a null steady-state. As the system discretization is done in the process model, the proposed approach easily deals with the time delay due to the PWM registers reload and avoids the discretization process of the controller. The intended settling time is the only parameter that the designer must select, simplifying the tuning process. The filter resonance is dealt inherently by the controller, avoiding additional damping techniques. The proposed controller is robust in the presence of a wide grid filter parameters variation.","PeriodicalId":111104,"journal":{"name":"2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124941861","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}
Tobias Häring, Roya Ahmadiahangar, A. Rosin, T. Korõtko, H. Biechl
{"title":"Accuracy Analysis of Selected Time Series and Machine Learning Methods for Smart Cities based on Estonian Electricity Consumption Forecast","authors":"Tobias Häring, Roya Ahmadiahangar, A. Rosin, T. Korõtko, H. Biechl","doi":"10.1109/CPE-POWERENG48600.2020.9161690","DOIUrl":"https://doi.org/10.1109/CPE-POWERENG48600.2020.9161690","url":null,"abstract":"Increasing shares of renewable energy sources in combination with rising popularity of demand response applications and flexibility programs forces higher awareness for production and consumption balancing. Accurate models for forecasting are not just necessary for PV- or wind power sources in smart cities, but also the prediction of loads respectively consumption, which can be based on time series analysis or machine learning methods. Three of those methods, namely a linear regression (LM), a long short-term memory network (LSTM) and a neural network model (NN), have been selected to see their performance on predicting the load of a large smart city on the example of the Estonian electricity consumption data. Hourly data of the year 2019 was used as training data to predict the first 20 days of 2020. For this kind of prediction, the LM showed the lowest root mean square error (RMSE) and had the lowest computational time. The neural network was slightly less accurate. The LSTM showed the worst performance in terms of accuracy and computational time. Thus, LSTM is not the preferred method for this kind of prediction and the recommendation for forecasting such loads would be a LM because the RMSE and computational effort needed are lower than for a NN.","PeriodicalId":111104,"journal":{"name":"2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126198135","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":"CPE-POWERENG 2020 Technical Program Reviewers","authors":"","doi":"10.1109/cpe-powereng48600.2020.9161589","DOIUrl":"https://doi.org/10.1109/cpe-powereng48600.2020.9161589","url":null,"abstract":"","PeriodicalId":111104,"journal":{"name":"2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115816638","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":"Influence of Weather Conditions in Power Quality Events","authors":"Nuno M. M. Rodrigues, F. Janeiro, P. Ramos","doi":"10.1109/CPE-POWERENG48600.2020.9161676","DOIUrl":"https://doi.org/10.1109/CPE-POWERENG48600.2020.9161676","url":null,"abstract":"Power quality (PQ) analysis requires the measurement of electrical quantities that characterize the power supply waveforms such as RMS value, frequency, unbalances, harmonic and inter-harmonic distortion or the presence of transients. The measurement of these quantities is regulated by internationally accepted standards from IEEE and IEC. Monitoring the delivered power quality is even more important due to the recent advances in power electronics and also the ever increasing penetration of renewable energies. Power quality measurements are typically performed at select locations, and not on a regular basis, usually to settle disputes between utility companies and consumers. With the increasing integration of renewable energy sources (RES) in the electrical power grid, the uncertainty in the available power capacity rises. In fact, the dependence of the power generated on weather conditions increases with the share of RES in the electrical grid. Additionally, this uncertainty is also affected by the consumer side, as electricity consumption is also weather-dependent and every kWh produced must be consumed somewhere. This paper presents a study relating PQ events, acquired with a PQ analyzer developed by the Instrumentation and Measurement Group (GIM) at Instituto de Telecomunicações (IT), with weather conditions acquired at Beja Airport.","PeriodicalId":111104,"journal":{"name":"2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)","volume":"155 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128666535","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}