Heng-Yi Su, Jian-Hong Liu, C. Chu, Sheng-Huei Lee, Yingyi Hong, Yu-Jen Lin
{"title":"Roles of Pumped Hydro Storages in Optimal Scheduling of Future Taiwan Power System with Highly Penetrated Renewable Energy Resources","authors":"Heng-Yi Su, Jian-Hong Liu, C. Chu, Sheng-Huei Lee, Yingyi Hong, Yu-Jen Lin","doi":"10.1109/IAS44978.2020.9334734","DOIUrl":"https://doi.org/10.1109/IAS44978.2020.9334734","url":null,"abstract":"Recently, Taiwanese government has announced an ambitious energy policy: up to 20 percent of total power will be generated from renewable energy resources by 2025. However, under such high-level penetration level of renewable energy resources (RER), the typical net load curve will be definitely reshaped as the duck curve and increase more challenges in power system operations. Due to the fast response and the larger capacity installation, the pumped hydro storages (PHS), which have better flexibility to provide the effective frequency regulating reserve to fast and efficiently support any electricity gaps caused by the loss of generators, has demonstrated as an efficient solution to tackle out this challenging task. In this paper, the optimal scheduling of future Taiwan power system (TPS) with highly penetrated RER and two pumped hydro storage plants is simulated by using the MATPOWER optimal scheduling tool MOST. Scenario studies under various penetration level of RER and different load levels are conducted. These scenario studies indicate the existing PHS in TPS can contribute the generator scheduling of future TPS under highly penetrated RER even under the net load curve with the duck curve.","PeriodicalId":115239,"journal":{"name":"2020 IEEE Industry Applications Society Annual Meeting","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116326680","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 Novel Three-Phase Transformerless Cascaded Multilevel Inverter Topology for Grid-connected Solar PV Applications","authors":"P. Chamarthi, A. Al‐Durra, S. Saleh","doi":"10.1109/IAS44978.2020.9334766","DOIUrl":"https://doi.org/10.1109/IAS44978.2020.9334766","url":null,"abstract":"Nowadays, multilevel inverters (MLIs) are gaining huge popularity for the high power transformerless PV applications. Among the traditional MLIs, the CHB MLI accommodates lower voltage rated input DC sources, which reduce the voltage stress across the devices. However, the CHB MLI requires multiple PV sources as separate DC link voltage sources which create more paths for leakage currents. Therefore, it is a challenging task to deal with the leakage currents in the case of CHB MLIs. In this paper, a novel three-phase transformerless inverter topology for grid-connected solar PV application is introduced. This proposed inverter topology has six switches per phase, and it has the combined advantages of dc-bypass and ac-by pass circuit configurations. A new modulation strategy is developed for the proposed topology; it is based on a sine triangle pulse width modulation technique combined with the dedicated logic functions. The gate pulses for all switches are provided by using these dedicated logic functions. The switching pulses obtained from the dedicated logic functions control all the switches of the inverter in such a way that the variation of common-mode voltage (CMV) is constant during the operation of the inverter. This results in reduced leakage current throughout the operation of the inverter. The theoretical analysis and simulations are presented to validate the concept of proposed topology for a 3kVA grid-connected system. All the major results are included in the paper. The experimental work is underway.","PeriodicalId":115239,"journal":{"name":"2020 IEEE Industry Applications Society Annual Meeting","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117174322","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":"Techno-Economic Analysis and Performance Evaluation of Rooftop Solar PV Systems Using Actual Data in Australian Context","authors":"Masood-ul Hasan, Saumajit Saha, M. Haque","doi":"10.1109/IAS44978.2020.9334784","DOIUrl":"https://doi.org/10.1109/IAS44978.2020.9334784","url":null,"abstract":"Rooftop PV solar systems are integrated with grid in numerous ways such as Off-Grid, On-Grid and Hybrid Rooftop PV systems. The PV power generation is intermittent in nature and involves uncertainties. Battery storage systems are installed with rooftop PV systems to regulate and supply power during off-peak solar hours. Battery systems degrade their capacity with its usage over time. Therefore, It is imperative to study economic perspectives of rooftop PV systems considering the intermittency of PV power generation and household electricity consumption patterns with the performance evaluation of rooftop PV-battery system while considering its aging mechanism of capacity degradation. This paper presents a generic methodology using Monte-Carlo simulation approach to understand the intermittent nature of PV generation and household load consumption and evaluates the battery performance in the rooftop PV systems by using the actual rooftop PV power generation and residential electricity consumption data collected from Sydney CBD Region, Australia. Battery aging, along with intermittent PV power and Household power consumption is used to give the economic perspectives of all PV-Grid integrations of rooftop PV-Battery systems. The results show a clear insight to the performance, economic and financial perspectives of rooftop residential solar PV systems over the time spam of thousand days that will help PV users to understand financial benefits involved specific to the solar PV-Grid integration schemes.","PeriodicalId":115239,"journal":{"name":"2020 IEEE Industry Applications Society Annual Meeting","volume":"212 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117297988","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":"Comparison of Communication-based and Coordinated-based Frequency Control Schemes for HVDC-Connected Offshore Wind Farms","authors":"Yuan-Kang Wu, G. Lu, Chung-Han Lin","doi":"10.1109/IAS44978.2020.9334859","DOIUrl":"https://doi.org/10.1109/IAS44978.2020.9334859","url":null,"abstract":"As the penetration of wind generation increases, the frequency support from wind turbines is necessary. There are many advantages for the connection between offshore wind farms and electricity grid via a high-voltage direct current (HVDC) system. HVDC transmission systems help wind farms provide frequency regulation and voltage control, which have more flexibility compared to HVAC transmission systems. Several control methods for frequency support have been developed. However, few works compared various control methods for a HVDC-connected offshore wind farm.This work proposes a detailed comparison on the main frequency-support control methods for the HVDC-connected offshore wind farm. These controls are mainly based on the communication-based schemes and the coordinated-based methods. The communication-based scheme uses communication devices to transfer the information of grid frequency to an offshore wind farm directly. The coordinated-based methods transfer the dynamic information of the DC voltage on HVDC via generator emulation control (GEC), and then enable the voltage source converter (VSC) at the wind-farm side to supply frequency regulation. In this work, the synthetic inertial control of wind turbines is considered, which include inertia and droop controllers; furthermore, the capacitors of the HVDC system can release the stored energy to help wind farms for the frequency-regulation function.","PeriodicalId":115239,"journal":{"name":"2020 IEEE Industry Applications Society Annual Meeting","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116768588","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}
P. Nirbhavane, Leslie Corson, S. M. Rizvi, A. Srivastava
{"title":"TPCPF: A Three Phase Continuation Power Flow for Voltage Stability Analysis of the Distribution Systems with DERs","authors":"P. Nirbhavane, Leslie Corson, S. M. Rizvi, A. Srivastava","doi":"10.1109/IAS44978.2020.9334849","DOIUrl":"https://doi.org/10.1109/IAS44978.2020.9334849","url":null,"abstract":"This paper presents a three-phase unbalanced continuation power flow tool (TPCPF) to analyze the voltage stability of distribution systems with high penetration of distributed energy resources (DER). Analyzing distribution system voltage stability with DER will allow high penetration of renewable energy required for sustainability. Developed algorithm can analyze voltage stability for both the meshed and radial system as well as for the balanced and unbalanced three-phase distribution systems. Developed tool allows the voltage stability analysis of the system in order to facilitate the proper planning, operation, control and management of the distribution system. The impact of DER) on the voltage stability of several test cases have been analyzed considering constant power (PQ) and regulated-voltage (PV) modes of operation of DER units. Results demonstrate that developed continuation power flow tool can be used to perform voltage stability analysis for active distribution systems.","PeriodicalId":115239,"journal":{"name":"2020 IEEE Industry Applications Society Annual Meeting","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116049920","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}
Zehua Liang, Dongdong Zhao, Rui Ma, Haiyan Li, Y. Huangfu
{"title":"Continuous Model Predictive Control of Current-fed Half-Bridge Isolated DC/DC Converter","authors":"Zehua Liang, Dongdong Zhao, Rui Ma, Haiyan Li, Y. Huangfu","doi":"10.1109/IAS44978.2020.9334796","DOIUrl":"https://doi.org/10.1109/IAS44978.2020.9334796","url":null,"abstract":"This paper focuses on the control of the snubberless naturally-clamped soft-switching current-fed halfbridge isolated DC/DC converter. The average state-space model for the converter is established and linearized. Adopting the discrete-time linear predictive model, a continuous control set model predictive controller (CCS-MPC) with fixed switching frequency is firstly proposed for this converter control to improve the converter dynamic performance. Meanwhile, in order to solve the model-mismatch to achieve offset-free tracking, the extended-Kalman observer is designed to obtain the voltage error and the integrated error for dynamically compensating the current reference calculation as a feedforward compensator. Finally, the proposed control strategy is validated by the simulation of MATLAB/Simulink, and the proposed approach can stabilize the output voltage with good steady-state performance and strong robustness against the input voltage and load variations.","PeriodicalId":115239,"journal":{"name":"2020 IEEE Industry Applications Society Annual Meeting","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116055769","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}
Peyman Haghgooei, B. Nahid-Mobarakeh, N. Takorabet, D. Khaburi
{"title":"Online Stator Flux Estimation for a Wound Rotor Synchronous Machine (WRSM)","authors":"Peyman Haghgooei, B. Nahid-Mobarakeh, N. Takorabet, D. Khaburi","doi":"10.1109/IAS44978.2020.9334903","DOIUrl":"https://doi.org/10.1109/IAS44978.2020.9334903","url":null,"abstract":"In this study, a flux estimator is proposed for a Wound Rotor Synchronous Machine (WRSM). In the proposed method, the stator flux linkage is estimated by considering two auxiliary variables and using a partially known model of the WRSM. The main purpose of this study is to obtain a function for flux in terms of motor currents. In purpose, the stator flux is estimated and mapped according to the currents. Simulation results show the feasibility of the proposed method not only in the maximum torque per ampere control but also in the weakened flux region.","PeriodicalId":115239,"journal":{"name":"2020 IEEE Industry Applications Society Annual Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125874030","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 Effect of Surface Conductivity on the Characteristics of the Dielectric Barrier Discharge Actuator","authors":"A. Shaygani, K. Adamiak","doi":"10.1109/IAS44978.2020.9334848","DOIUrl":"https://doi.org/10.1109/IAS44978.2020.9334848","url":null,"abstract":"The effect of the surface conductivity on the electrical and mechanical characteristics of the surface dielectric barrier discharge (SDBD) actuator has been numerically investigated in this study. A typical wire-to-plate AC-SDBD actuator to control airflow alongside a flat dielectric plate has been considered. A sinusoidal high voltage of varied frequencies and amplitudes is supplied to the 300-micrometer diameter active electrode, and the passive electrode is encapsulated inside a dielectric plate. Two-species ion transport model, involving generic positive and negative ions, coupled to electrostatics model is assumed. The electrostatic field is affected by both the space and the surface charges. The surface charge is accumulated due to ion deposition, but its distribution varies due to the surface ohmic conduction. The Navier-Stokes equations for the flow simulation, which include the time-averaged electrohydrodynamic (EHD) body force determined from the discharge model, are solved to analyze the flow field and the boundary layer morphology. The numerical algorithm has been implemented in COMSOL commercial package. The significance of the dielectric surface conductivity on the discharge behavior and the flow field has been shown. The dielectric surface conductivity behaves non-monotonically and affects the flow field by altering the EHD force strength, direction and distribution.","PeriodicalId":115239,"journal":{"name":"2020 IEEE Industry Applications Society Annual Meeting","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124307138","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}
Evan S. Jones, Oluwaseun M. Akeyo, K. Waters, D. Ionel
{"title":"Electric Power System Studies for a Multi-MW PV Farm and Large Rural Community with Net Zero Energy and Microgrid Capabilities","authors":"Evan S. Jones, Oluwaseun M. Akeyo, K. Waters, D. Ionel","doi":"10.1109/IAS44978.2020.9334740","DOIUrl":"https://doi.org/10.1109/IAS44978.2020.9334740","url":null,"abstract":"Solar photovoltaic (PV) systems are currently being deployed at an accelerated rate because of their cost-competitiveness and environmental benefits, which make them a prime candidate for local renewable energy generation in communities. Microgrids can help accommodate for the problems that accompany PV systems, such as intermittency due to weather, by coordinating different distributed energy resources (DERs), while islanded or by drawing power from the utility while in grid-connected mode. An islanding option is also important for resilience and grid fault mitigation, even if other DERs are not present within the system. This paper studies the potential benefits that a multi-MW utility-scale PV farm may yield for a large rural community when installed within a grid-connected microgrid structure. The PV system was optimally sized based on net present cost (NPC) with a net zero energy (NZE) goal. With local solar PV generation and a connection to the grid to transmit overgeneration through, the community can be NZE by having a PV farm power rating that is much greater than the peak load demand. This may lead to cases of increased transient severity during mode transitions and may require substantial curtailment of PV. A control scheme is proposed to smooth system transients that result from the switching between the two modes of operation in order to avoid system damage or unreliable load service.","PeriodicalId":115239,"journal":{"name":"2020 IEEE Industry Applications Society Annual Meeting","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123616663","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":"Modeling of a Reciprocating Engine-Generator Set for Controller Hardware in the Loop Testing of Island Microgrid Control Systems","authors":"Jan Westman, R. Hadidi, J. C. Fox, J. Leonard","doi":"10.1109/IAS44978.2020.9334745","DOIUrl":"https://doi.org/10.1109/IAS44978.2020.9334745","url":null,"abstract":"This paper demonstrates the modeling of a real engine-generator set based on manufacturer data for use in controller hardware in the loop testing of microgrid control systems. The simulation environment used is RTDS Technologies’ real time digital simulator using PB5 cards. In addition, this paper provides detail on integration of a Woodward easYgen controller with the simulator IO for control of the simulated engine-generator set. Testing of the developed model is performed to validate the standard parameters of the synchronous generator and the dynamic performance of the engine-generator set during starting, load step change, and stopping. The result of this investigation is an engine-generator set model that exhibits the characteristics of real equipment and may be used in the validation of controller hardware and software for the de-risking of microgrid control systems.","PeriodicalId":115239,"journal":{"name":"2020 IEEE Industry Applications Society Annual Meeting","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121696206","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}