{"title":"Electric Vehicle Charging Station Security Enhancement Measures","authors":"Shahriar Saadat, Samantha Maingot, Sahba Bahizad","doi":"10.1109/eGRID48559.2020.9330666","DOIUrl":"https://doi.org/10.1109/eGRID48559.2020.9330666","url":null,"abstract":"As the electric vehicle industry is growing, the security concerns for public charging stations is increasing for both manufacturers and consumers. A robust, well- uniformed process is essential to assess and enhance the current security measures and offer an executable mitigation plan. Security assessments of potential vulnerabilities should be performed more frequently due to technology changes as well as various parts being integrated into the infrastructure of both electric vehicle and charging station without security been considered. This paper discusses the implementation of the multi-layer authentication using ANPR and Loop technologies to provide an in-depth security and mitigate the cyber-attack risks for electric vehicle charging stations.","PeriodicalId":296524,"journal":{"name":"2020 5th IEEE Workshop on the Electronic Grid (eGRID)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126936683","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":"Smart Grid and Cybersecurity Challenges","authors":"Shahriar Saadat, Sahba Bahizad, Thnwa Ahmed, Samantha Maingot","doi":"10.1109/eGRID48559.2020.9330660","DOIUrl":"https://doi.org/10.1109/eGRID48559.2020.9330660","url":null,"abstract":"In the modern and computerized energy industry cyber security plays a critical role alongside physical security. The smart grid is considered as one of the leading revolutionary innovations in this industry with established solutions and engineering sciences that support the efficiency, flexibility and reliability of power, gas and water systems. A cybersecurity breach in this industry can have irreversible consequences resulting in disasters that threaten human life, along with more tradition consequences in security principles such as confidentiality, integrity and availability of the service or data. This paper seeks to describe the cyber security issues present in smart grids, including past challenges and their root causes, and proposes methodological approaches to protect the smart grid against cyber security attacks by proposing potential mitigating controls.","PeriodicalId":296524,"journal":{"name":"2020 5th IEEE Workshop on the Electronic Grid (eGRID)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131213764","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}
Mostafa Ahmed, Mohamed Abdelrahem, I. Harbi, R. Kennel
{"title":"Evaluation of Predictive Direct Current and Direct Power Control for Grid-connected PV Systems","authors":"Mostafa Ahmed, Mohamed Abdelrahem, I. Harbi, R. Kennel","doi":"10.1109/eGRID48559.2020.9330637","DOIUrl":"https://doi.org/10.1109/eGRID48559.2020.9330637","url":null,"abstract":"Predictive control provides many advantages over conventional control techniques. Thus, in this paper, a comparative study between the predictive direct current control (PDCC) and predictive direct power control (PDPC) is investigated. The study focuses on applying these control strategies with renewable energy systems (RESs), especially photovoltaic (PV) ones. RESs are integrated with high penetration into the grid, and they must satisfy certain regulations to sustain the grid stability. The studied system consists of a PV array and boost converter followed by two-level inverter to enable the grid connection, where the maximum power point tracking (MPPT) function is accomplished by an adaptive step-size method. The adopted technique here is perturb and observe (P&O) method. The control of active and reactive power is performed using PDPC and PDCC for the purpose of evaluation in terms of power quality, total harmonic distortion (THD), average switching frequency, implementation, calculation burden, etc. The system is validated by simulation results via Matlab platform under various operating conditions.","PeriodicalId":296524,"journal":{"name":"2020 5th IEEE Workshop on the Electronic Grid (eGRID)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123562304","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":"Active Disturbance Rejection Controller with Virtual Impedance-based Current Limiter for Voltage Regulation of DC/DC Converters","authors":"Asimenia Korompili, A. Monti","doi":"10.1109/eGRID48559.2020.9330654","DOIUrl":"https://doi.org/10.1109/eGRID48559.2020.9330654","url":null,"abstract":"In this paper we integrate a virtual impedance-based current limiter (VICL) in the active disturbance rejection control (ADRC) employed for the voltage regulation of buck converters in MTDC systems. The ADRC voltage controller consists of a linear quadratic Gaussian (LQG) structure with reference trajectory generator. Small-signal stability analysis and time-domain simulations investigate the performance of this ADRC+VICL model. The VICL manages to limit the over-current of the converter without affecting the stability of the system. The converter achieves to exit the overcurrent limiting mode and enter the voltage control mode smoothly. The ADRC mitigates the interactions between different components in the system and stabilises it, thanks to the virtual disturbance, which represents the actual dynamics at the converter terminals. The beneficial performance characteristics of the ADRC+VICL model are also demonstrated through real-time simulations results.","PeriodicalId":296524,"journal":{"name":"2020 5th IEEE Workshop on the Electronic Grid (eGRID)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127544554","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}
Jin Qiang, Terng-Wei Tsai, Lars Hagemann, Zhiqing Yang, Benedict J. Mortimer, R. D. De Doncker
{"title":"Control Strategies for Robust Low-Voltage Ride-Through Operation of Grid-Tied PV Inverters","authors":"Jin Qiang, Terng-Wei Tsai, Lars Hagemann, Zhiqing Yang, Benedict J. Mortimer, R. D. De Doncker","doi":"10.1109/eGRID48559.2020.9330630","DOIUrl":"https://doi.org/10.1109/eGRID48559.2020.9330630","url":null,"abstract":"This paper investigates the low-voltage ride-through (LVRT) operation of a grid-tied photovoltaic inverter system. To prevent over-rating operations, the conventional constant peak current strategy is usually implemented to limit the peak current amplitude considering the injected reactive current. However, this can lead to a dc-link energy imbalance due to the maximum-power-point tracking function. A short-term overshoot of the dc-link voltage can occur after grid voltage recovery. Abnormal oscillations can occur due to the nonlinear characteristics of the demand reactive current specified in grid codes. Moreover, mismatching injections of the reactive power can also occur due to the inaccurate voltage sag detections. To cope with the aforementioned issues, control strategies are proposed to guarantee robust LVRT operations. The proposed control methods are validated in simulations under different scenarios.","PeriodicalId":296524,"journal":{"name":"2020 5th IEEE Workshop on the Electronic Grid (eGRID)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116730380","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":"Demands for Bridging Power Electronics and Power System Engineering Concepts","authors":"S. Peyghami, F. Blaabjerg","doi":"10.1109/eGRID48559.2020.9330663","DOIUrl":"https://doi.org/10.1109/eGRID48559.2020.9330663","url":null,"abstract":"Power electronics are becoming an underpinning technology for development of future electric energy systems. Proliferation of power converters will affect the dynamic and static performance of power systems. Thus, design, planning and operation of power systems should take into account the converter dynamics and also static models. Moreover, control, design and manufacturing of converters require considering their interactions with the entire power system performance. This paper highlights the importance of bridging power electronics and power system engineering concepts in future power systems. First, different concepts of power electronics and power system engineering is discussed. Afterwards, the necessity for bridging these two areas are explained. Finally, numerical case studies on a DC microgrid are provided for illustrating the needs for bridging these concepts.","PeriodicalId":296524,"journal":{"name":"2020 5th IEEE Workshop on the Electronic Grid (eGRID)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116747219","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}
A. Davoodi, S. Peyghami, Yongheng Yang, T. Dragičević, F. Blaabjerg
{"title":"A Preventive Maintenance Planning Approach for Wind Converters","authors":"A. Davoodi, S. Peyghami, Yongheng Yang, T. Dragičević, F. Blaabjerg","doi":"10.1109/eGRID48559.2020.9330628","DOIUrl":"https://doi.org/10.1109/eGRID48559.2020.9330628","url":null,"abstract":"Power Electronic (PE) converters are the heart of modern wind turbine systems, and their failures can significantly reduce turbine energy production. On the other hand, preventive maintenance, e.g., replacement of the components after a certain age, is an effective way to limit the converter unreliability. With that, this paper proposes an approach to find the optimal replacement time of components by quantifying and minimizing the total costs. The proposed framework is demonstrated on a 2-MW wind turbine system, where the outcomes are compared with Monte Carlo simulation results. Several factors are considered in this maintenance planning approach. By performing a sensitivity analysis, among them, repair rate, random-chance failure rate, scale parameter of the wear-out failure distribution, and the average price of electricity are identified as the key factors.","PeriodicalId":296524,"journal":{"name":"2020 5th IEEE Workshop on the Electronic Grid (eGRID)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133240711","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}
I. Harbi, Mohamed Abdelrahem, Mostafa Ahmed, R. Kennel
{"title":"Model Predictive Control with Switching Frequency Minimization for Modified Packed U-cell Inverter","authors":"I. Harbi, Mohamed Abdelrahem, Mostafa Ahmed, R. Kennel","doi":"10.1109/eGRID48559.2020.9330665","DOIUrl":"https://doi.org/10.1109/eGRID48559.2020.9330665","url":null,"abstract":"In this paper, a finite control set model predictive control (FCS-MPC) for single-phase cascaded modified packed U-cell (MPUC) inverter is presented. The considered multilevel inverter (MLI) topology requires less number of switches and produces more levels in the output waveform compared to the conventional and recent ones. Two control objectives are achieved in the proposed control algorithm, reference current tracking and switching frequency minimization. The proposed FCS-MPC considers only the effective different vectors of the MPUC with eliminating the redundant states of the converter to reduce the computational effort of the algorithm. By minimizing a user-defined cost function, the developed FCS-MPC algorithm achieves low mean absolute reference tracking error of the grid current, high inverter voltage quality and low average switching frequency of the switches. The trade-off between the average switching frequency and the tracking performance with the voltage quality is studied to determine the suitable range of the weighting factor λn for the proposed system. Simulation results are presented using MATLAB/Simulink to verify the effectiveness of the control system.","PeriodicalId":296524,"journal":{"name":"2020 5th IEEE Workshop on the Electronic Grid (eGRID)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117102513","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":"Converter-based Intelligent Transformer for Enhanced Grid Monitoring and Control","authors":"Moazzam Nazir, J. Enslin","doi":"10.1109/eGRID48559.2020.9330675","DOIUrl":"https://doi.org/10.1109/eGRID48559.2020.9330675","url":null,"abstract":"The electric grid is rapidly evolving by incorporating advanced equipment that bears a variety of smart features in addition to their traditional functionalities. The power transformers are the most significant equipment in the substation and have been traditionally performing voltage conversion and isolation. However, the modern grid dynamics demand a variety of smart control features at strategic locations of the grid for which the most appropriate candidate are the transformers. Accordingly, the idea of solid-state transformers (SST) was conceived but they are still far from integration into grid due to their poor lifetime and reliability concerns. Also, the investment on existing infrastructure demands introduction of smart features into already installed traditional transformers. This paper proposes a converter-based intelligent transformer configuration that utilizes conventional transformers and introduces smart features into them through a power electronics-based module integrated between neutral and substation ground. The device introduces a variety of advanced features in traditional transformers that include voltage regulation, voltage balancing, harmonics isolation, supporting voltage ride through (VRT) capabilities of distributed energy resources (DERs) and avoiding grid collapse due to certain natural or man-made disturbances, such as, solar storms and high-altitude nuclear explosions. The proposed scheme is evaluated utilizing Typhoon hardware-in-the-loop (HIL-604) real-time simulator for a modified IEEE-9 bus benchmark system. The results verify the promising performance of the proposed scheme to enhance grid reliability, resiliency and power quality.","PeriodicalId":296524,"journal":{"name":"2020 5th IEEE Workshop on the Electronic Grid (eGRID)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134321645","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":"Hardware development and validation of DC Circuit Breaker using counter-current injection method","authors":"Muhammad Maaz Qaiser, Ali Virdag","doi":"10.1109/eGRID48559.2020.9330365","DOIUrl":"https://doi.org/10.1109/eGRID48559.2020.9330365","url":null,"abstract":"This paper presents development of hardware along with testing of DC (Direct Current) circuit breaker using counter current injection method [1]. The optimized implementation of the system is achieved using the simulation results of the DC circuit breaker topology. To analyze the behavior of prototype on high current, a test bench circuit is developed. The current and voltage sensors are used to sense various outputs during the realization of prototype. The data acquisition is done using LabView. The operating time of clearing fault current with different nature of loads has been discussed in this paper.","PeriodicalId":296524,"journal":{"name":"2020 5th IEEE Workshop on the Electronic Grid (eGRID)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133763261","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}