{"title":"A new multi-port active DC-link for PMG-based WECSs","authors":"X. F. S. Onge, K. McDonald, C. Richard, S. Saleh","doi":"10.1109/ICPS.2018.8369962","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369962","url":null,"abstract":"This paper presents the development and performance evaluation of a new active multi-port dc-link for applications in permanent magnet generator (PMG)-based wind energy conversion systems (WECSs). The proposed dc-link is developed as a mid-stage between a three phase (3φ) multilevel ac-dc generator-side power electronic converter (PEC) and a 3φ 6-pulse dc-ac grid-side PEC. The design of the dc-link is based on a multi-port converter (MPC) topology with two dc-dc PECs, which have their outputs connected in parallel. Each dc-dc PEC is operated and controlled independently, in order to achieve separate voltage-transfer ratios, along with the possibility of processing continuous or discontinuous input dc voltages. The performance of the MPC active dc-link is evaluated in experiments for a 7.5 kW PMG-based WECS under different operating conditions. Test results show that the proposed dc-link is capable of producing a high quality regulated dc voltage over a wide range of wind speeds, and increasing the extracted power from the PMG. Performance results also demonstrate that the operation of the MPC active dc-link has minor impacts on the harmonic distortion at the terminals of the PMG, along with negligible impacts on the operation and control of the grid-side PEC.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127826122","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":"Priority based restoration of unbalanced electric distribution systems after multiple faults","authors":"Divya T. Vedullapalli, R. Hadidi, Luna S. Bozeman","doi":"10.1109/ICPS.2018.8369992","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369992","url":null,"abstract":"This paper presents a heuristic optimization model to restore the electrical distribution systems (EDS) after multiple faults due to natural disasters. The algorithm finds the switching sequence to energize as many healthy zones as possible after multiple simultaneous faults in an unbalanced distribution system. To improve the grid resiliency, utilities have to quickly clear the faults and restore power to the affected customers. The proposed algorithm also gives the order in which the faults have to be cleared depending on the disconnected load and the number of customers affected. Weights can be assigned based on priority to critical loads such as hospitals, emergency call centers, fire stations etc. At each step of the switching sequence, the distribution system operating constraints such as line flows, bus voltages have to be satisfied. OpenDSS is used to perform power flow and MATLAB for optimization. Studies on IEEE-123 bus system validate the algorithm proposed.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131191035","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":"Battery energy storage cost and capacity optimization for university research center","authors":"M. Moghimi, R. Garmabdari, S. Stegen, Junwei Lu","doi":"10.1109/ICPS.2018.8369968","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369968","url":null,"abstract":"Microgrids (MGs) are the essential part of the modern power grids defined as the building blocks of smart grids. Renewable Energy Sources (RESs) and Battery Energy Storage Systems (BESSs) combined with Distributed Generators (DGs) form a comprehensive MG, which require the control and Energy Management System (EMS) to fulfill the load and grid requirements. As the need for BESS grows due to uncertainties of RESs, scheduling and cost management of BESSs in the MG becomes more of a concern. In this paper, BESSs have been designed for a university research center to simultaneously overcome the outage problem and shave the peak demand considering the BESS sizing and degradation; MG cost minimization, as well as MG scheduling. PV and wind are the RESs employed in this study and in combination; Li-Ion BESS has been utilized to investigate the MG performance. A two-layer optimization algorithm has been presented to optimally define the BESS size and minimize the operational cost of the MG achieving the peak shaving and valley filling objectives. The results prove the functionality and applicability of the proposed system to be implemented as a part of the experimental MG at Griffith University in order to enhance the stability and reliability of the research center and at the same time minimize the operational costs of the MG.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114187859","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":"Optimal placement of unified power flow controller and hybrid power flow controller using optimization technique","authors":"A. A. Bhandakkar, L. Mathew","doi":"10.1109/ICPS.2018.8370001","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8370001","url":null,"abstract":"Installing Flexible AC Transmission System (FACTS) devices in the power system is an effective alternative for utilizing transmission lines assets to their full extent. Siting of FACTS controllers at the best location in the network is a big challenge. UPFC is a very costly controller because of its configuration. A drawback of installing UPFC is that, when the transmission line with any compensating devices is planned for upgradation by UPFC installation, it does not allow to retrofit the existing devices like SVC, TCSC or even a switched capacitor. Hybrid Power Flow Controller (HPFC) which can be designed using the existing VAR compensator/ controller has the advantage that it is cost-effective and is a performance equivalent alternative of UPFC. The HPFC configuration used in this paper comprises of two VSC connected in shunt through coupling transformers, on either side of TCSC which is connected in series with the transmission line, and the two VSC share a common DC capacitor link. In this paper, optimal placement of UPFC and HPFC is obtained using Genetic Algorithm (GA) based approach. A power flow model of UPFC and HPFC are developed using constraint equations and objective functions. The results so obtained are compared and it is observed that generation cost at the optimal location of HPFC is less than that of with UPFC and total active power loss is comparable with that of UPFC. The same is compared with the uncompensated network. The technique is validated by multi-machine-9 bus system using MATLAB script file.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127747699","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":"Day-ahead coordinated scheduling of hydro and wind power generation system considering uncertainties","authors":"Yuanzheng Li, Tianyang Zhao, Chang Liu, Zhiyuan Yu, Kaicheng Li, L. Wu","doi":"10.1109/icps.2018.8370003","DOIUrl":"https://doi.org/10.1109/icps.2018.8370003","url":null,"abstract":"This paper presents a day-ahead coordinated scheduling method of hydro and wind power generation system (HWPGS) with consideration of uncertainties. In this method, we first formulate the coordinated scheduling model with two-part price and power flow constraints, which can well manifest the fixed and variable economic benefits as well as the secure operation of HWPGS, respectively. Then, interval analysis is adopted to study effect of uncertain wind power, water inflow, and electricity load on the coordinated scheduling model. Finally, we use a real test system in a western area of China to conduct simulation studies, which verify the effectiveness of interval analysis and the effect of price mechanism on the day-ahead coordinated scheduling of HWPGS.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117067547","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":"The equipment grounding system (EGS) as an effective bonding topology for telecommunications environments","authors":"K. Michaels","doi":"10.1109/icps.2018.8369993","DOIUrl":"https://doi.org/10.1109/icps.2018.8369993","url":null,"abstract":"Being provided an adequate telecommunications bonding infrastructure is one of the primary concerns for telecommunications cabling designers and installers for new and existing installations. Though not considered a safety ground where ground fault current is concerned, the telecommunications bonding infrastructure has importance where the components are intended to equalize potentials in the event of lightning, electrostatic discharge, electromagnetic interference, and other transient events that may be imposed on it, or within telecommunications spaces. Very recently, several telecommunications design groups with varying responsibilities for data center, military encryption, and commercial facilities have explored feasible options in providing an equipotential plane for their telecommunications bonding infrastructure, especially in locations where exposed metal frame of the building is not available; the most prominent of these options being the use of the ac equipment grounding conductor (EGC) system due to the abundance of metallic surface area utilized for the ac premises wiring system. This paper is intended to present field-testing data and draw technical conclusions from same as to whether the EGS is viable as an alternate bonding infrastructure plane that can achieve the same effect as the standard practices in place today.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126740373","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":"A simple approach to conductor sizing and prolonging the thermal life of electrical cables below 1000V for industrial and commercial applications","authors":"Brandon R. Meier, B. Chowdhury","doi":"10.1109/icps.2018.8370000","DOIUrl":"https://doi.org/10.1109/icps.2018.8370000","url":null,"abstract":"Electrical conductors are, arguably, the most important component of industrial and commercial electrical distribution systems as electrical conductors, or just conductors, facilitate the interconnections between a source (e.g., generator, renewable energy source, Utility, electrical distribution panel, etc.) and load (e.g., wall outlet, control panel, motor, etc.). However, for typical electrical system installations, electrical conductors are rarely given the attention deserved. In general, the selection of conductors becomes a fine balancing act of meeting the minimum National Electric Code (NFPA 70) requirements for minimum ampacity and the economics of choosing aluminum vs. copper. This can lead to conditions where conductors are not adequately sized for the conditions they are exposed to, which can result in premature failure of cable insulation. This paper presents a simple approach to proper conductor selection, with an emphasis on maximizing the thermal life of cable insulation.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"93 26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128981008","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 interactive decision making model based on energy and reserve for electric vehicles and power grid using generalized Stackelberg game","authors":"Yuanzheng Li, Tianyang Zhao, Chang Liu, Kaicheng Li, Ping Wang, Zhaohao Ding","doi":"10.1109/icps.2018.8369970","DOIUrl":"https://doi.org/10.1109/icps.2018.8369970","url":null,"abstract":"This paper proposes an interactive decision making model for electric vehicles (EVs) and power grid, in the perspective of energy and reserve. In this model, EVs optimize their energy and reserve plans according to prices set by the power grid. Meanwhile, the power grid aims to obtain the optimal energy and reserve prices for EVs, in order to maximize its benefits. Then we use the generalized Stackelberg game (GSG) to formulate the interactive decision making model, and prove the existence and uniqueness of the generalized Stackelberg equilibrium. Simulation results verify that the proposed interactive model can well improve benefits of EVs, while guaranteeing their quality of charging services.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130725593","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":"Decoupled frequency and voltage control for stand-alone microgrid with high renewable penetration","authors":"Kwang Woo Joung, Taewan Kim, Jung-Wook Park","doi":"10.1109/icps.2018.8369983","DOIUrl":"https://doi.org/10.1109/icps.2018.8369983","url":null,"abstract":"In South Korea, the stand-alone microgrid on an island has synchronous diesel generators and multiple distributed generations (DGs) based on renewable energy and energy storage devices. According to the active policy of government to develop eco-friendly microgrids with zero carbon emission, many diesel generators in stand-alone microgrids are being replaced by the DGs. It brings challenges on the operation and control of multiple DGs because this causes the lack of inertia, which is originally provided from the diesel generators. This paper proposes a new decoupled frequency and voltage controller for DGs, which is able to keep the grid frequency and voltage magnitude constant. For frequency control, a frequency recovery control loop is newly added to conventional droop and inertia control loops for both the effective power sharing and stabilization of frequency response after a disturbance. For voltage control, the proposed controller regulates the grid voltage in an inertia-free mode, in which all diesel generators are disconnected, while providing the conventional reactive power-voltage droop control under a normal condition. As the result, the proposed controller can enhance the resilience and increase the penetration of renewable energies to the stand-alone microgrid. To verify the effectiveness of proposed controller, several case studies are carried out by using the practical data of a real stand-alone microgrid in South Korea.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114779486","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":"Design of a DC series arc fault detector for photovoltaic systems protection","authors":"J. Gu, De-Shin Lai, Jiang-Jun Huang, Ming-Ta Yang","doi":"10.1109/icps.2018.8370009","DOIUrl":"https://doi.org/10.1109/icps.2018.8370009","url":null,"abstract":"Because the line current decreases when a DC series arc fault occurs in a solar photovoltaic (PV) system, conventional overcurrent protection devices are unable to isolate such fault. A series arc generates extreme heat and can lead to fire incidents if the arc lasts long enough. The current components in the frequencies range of 48.83 kHz ∼ 93.99 kHz in a series arc fault are much higher than in the pre-fault current, fast Fourier transform (FFT) can be applied to analyze the current signal and to detect a DC series arc fault. An experimental grid-connected solar PV system consisting of ten polysilicon modules connected in series is constructed in this study, and a new design of DC series arc fault detector (AFD) is proposed and tested under different operation conditions. Two commercial AFDs are also tested in this study for comparison. The result shows that the proposed AFD can detect DC series arc faults in a solar PV system with 100% accuracy.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126015439","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}