Pub Date : 2020-08-02DOI: 10.1109/PESGM41954.2020.9281802
Ning Lin, V. Dinavahi
The accuracy of power electronics simulation relies on the semiconductor switch model employed. Thus, in this work where an ultrafast mechatronic circuit breaker (UFMCB) is implemented in real-time on the field-programmable gate array, a detailed nonlinear thyristor model is proposed for extra device-level information regarding design evaluation. The cascaded thyristors impose a heavy computational burden on the UFMCB simulation, and node elimination is achieved following the proposal of a scalable thyristor model. For the convenience of the circuit breaker’s integration into DC grid, a pair of coupled voltage-current sources is inserted as its interface, which achieves a reduction in the dimension of system admittance matrix, and the subsequent proposal of a relaxed scalar Newton-Raphson method further expedites the simulation by decomposing the nodal matrix equation. Meanwhile, the modular multilevel converter as a DC grid terminal adopts half-bridge and clamped double submodule topologies to test system performance in conjunction with the UFMCB. Realtime execution is achieved and the results are validated by ANSYS/Simplorer and PSCAD/EMTDC in device- and system-level, respectively.
{"title":"Electro-Thermal Transient Behavioral Modeling of Thyristor-Based Ultrafast Mechatronic Circuit Breaker for Real-Time DC Grid Emulation","authors":"Ning Lin, V. Dinavahi","doi":"10.1109/PESGM41954.2020.9281802","DOIUrl":"https://doi.org/10.1109/PESGM41954.2020.9281802","url":null,"abstract":"The accuracy of power electronics simulation relies on the semiconductor switch model employed. Thus, in this work where an ultrafast mechatronic circuit breaker (UFMCB) is implemented in real-time on the field-programmable gate array, a detailed nonlinear thyristor model is proposed for extra device-level information regarding design evaluation. The cascaded thyristors impose a heavy computational burden on the UFMCB simulation, and node elimination is achieved following the proposal of a scalable thyristor model. For the convenience of the circuit breaker’s integration into DC grid, a pair of coupled voltage-current sources is inserted as its interface, which achieves a reduction in the dimension of system admittance matrix, and the subsequent proposal of a relaxed scalar Newton-Raphson method further expedites the simulation by decomposing the nodal matrix equation. Meanwhile, the modular multilevel converter as a DC grid terminal adopts half-bridge and clamped double submodule topologies to test system performance in conjunction with the UFMCB. Realtime execution is achieved and the results are validated by ANSYS/Simplorer and PSCAD/EMTDC in device- and system-level, respectively.","PeriodicalId":106476,"journal":{"name":"2020 IEEE Power & Energy Society General Meeting (PESGM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129843497","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}
Pub Date : 2020-08-02DOI: 10.1109/PESGM41954.2020.9281490
Yaowen Yu, P. Luh, E. Litvinov, T. Zheng, Jinye Zhao, F. Zhao, Dane A. Schiro
Reliability is an overriding concern for power systems that involve different types of uncertainty including contingencies and intermittent renewables. Contingency-constrained unit commitment (CCUC) satisfying the “N – 1 rule” is extremely complex, and the complexity is now compounded by the drastic increase in renewables. This paper develops a novel interval optimization approach for CCUC with N – 1 transmission contingencies and renewable generation. A large number of transmission contingencies are innovatively described by treating corresponding generation shift factors (GSFs) as uncertain parameters varying within intervals. To ensure solution robustness, bounds of GSFs and renewables in different types of constraints are captured based on interval optimization. The resulting model is a mixed-integer linear programming problem. To alleviate its conservativeness and to further reduce the problem size, ranges of GSFs are shrunk through identifying and removing redundant transmission constraints. To solve large-scale problems, Surrogate Lagrangian Relaxation (SLR) and branch-and-cut (B&C) are used to simultaneously exploit separability and linearity. Numerical results demonstrate that the new approach is effective in terms of computational efficiency, solution robustness, and simulation costs.
{"title":"Transmission Contingency-Constrained Unit Commitment with High Penetration of Renewables via Interval Optimization","authors":"Yaowen Yu, P. Luh, E. Litvinov, T. Zheng, Jinye Zhao, F. Zhao, Dane A. Schiro","doi":"10.1109/PESGM41954.2020.9281490","DOIUrl":"https://doi.org/10.1109/PESGM41954.2020.9281490","url":null,"abstract":"Reliability is an overriding concern for power systems that involve different types of uncertainty including contingencies and intermittent renewables. Contingency-constrained unit commitment (CCUC) satisfying the “N – 1 rule” is extremely complex, and the complexity is now compounded by the drastic increase in renewables. This paper develops a novel interval optimization approach for CCUC with N – 1 transmission contingencies and renewable generation. A large number of transmission contingencies are innovatively described by treating corresponding generation shift factors (GSFs) as uncertain parameters varying within intervals. To ensure solution robustness, bounds of GSFs and renewables in different types of constraints are captured based on interval optimization. The resulting model is a mixed-integer linear programming problem. To alleviate its conservativeness and to further reduce the problem size, ranges of GSFs are shrunk through identifying and removing redundant transmission constraints. To solve large-scale problems, Surrogate Lagrangian Relaxation (SLR) and branch-and-cut (B&C) are used to simultaneously exploit separability and linearity. Numerical results demonstrate that the new approach is effective in terms of computational efficiency, solution robustness, and simulation costs.","PeriodicalId":106476,"journal":{"name":"2020 IEEE Power & Energy Society General Meeting (PESGM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129880958","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}
Pub Date : 2020-08-02DOI: 10.1109/PESGM41954.2020.9281952
Mengxuan Shi
For a distributed DC microgrid, the conventional voltage control highly relies on the accuracy of the voltage observer, and the observer will produce an estimation error under time delays. To address the problem brought by the voltage observer, this paper transforms the voltage control into an optimization problem and integrates it into the power sharing control based on the PI consensus algorithm. With the proposed optimal control, the DC bus voltage control and proportional power sharing of the energy storages can be realized in one controller, so that the controller structure is dramatically simplified and the control accuracy will not be affected by the time delay. In addition, to further improve the system stability to resist delay, scattering transformation is introduced in the distributed optimal controller. By constructing Lyapunov function, it has been proved that the stability of the controller under the time delay can be guaranteed. Simulations are conducted to verify the effectiveness of the proposed control strategy and the transformation with and without time delay.
{"title":"Distributed Optimal Control of Energy Storages in a DC Microgrid with Communication Delay","authors":"Mengxuan Shi","doi":"10.1109/PESGM41954.2020.9281952","DOIUrl":"https://doi.org/10.1109/PESGM41954.2020.9281952","url":null,"abstract":"For a distributed DC microgrid, the conventional voltage control highly relies on the accuracy of the voltage observer, and the observer will produce an estimation error under time delays. To address the problem brought by the voltage observer, this paper transforms the voltage control into an optimization problem and integrates it into the power sharing control based on the PI consensus algorithm. With the proposed optimal control, the DC bus voltage control and proportional power sharing of the energy storages can be realized in one controller, so that the controller structure is dramatically simplified and the control accuracy will not be affected by the time delay. In addition, to further improve the system stability to resist delay, scattering transformation is introduced in the distributed optimal controller. By constructing Lyapunov function, it has been proved that the stability of the controller under the time delay can be guaranteed. Simulations are conducted to verify the effectiveness of the proposed control strategy and the transformation with and without time delay.","PeriodicalId":106476,"journal":{"name":"2020 IEEE Power & Energy Society General Meeting (PESGM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128349228","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}
Pub Date : 2020-08-02DOI: 10.1109/PESGM41954.2020.9281449
S. Ekisheva, M. Papic, M. Pakeltis, G. B. Tillis, Daniel J. King
This paper presents a first-of-its-kind analysis of the North American Electric Reliability Corporation (NERC) Transmission Availability Data System (TADS) outage data by fault type for transmission lines in the North American bulk electric system (BES) for both sustained and momentary outages from 2015 through 2018, including all the element types reported in TADS: alternating current (AC) circuits, direct current (DC) circuits, transformers, and AC/DC back-to-back converters. The paper covers an extensive spectrum of outage data attributes influenced by or correlated to fault type. Findings for automatic outages of all elements are presented. A deeper analysis of AC Circuit elements is also presented with statistically significant findings regarding voltage class, outage initiation code, outage mode code, initiating cause code, and outage duration. The analysis of outages and fault-type statistics contributes to improvements in power system planning and operations, including but not limited to: identifying weak points and reliability trends; targeting the development of design standards; compliance with planning and operating standards; and evaluating the effect of maintenance practices on reliability.
{"title":"Assessment of North American Transmission Outages by Fault Type","authors":"S. Ekisheva, M. Papic, M. Pakeltis, G. B. Tillis, Daniel J. King","doi":"10.1109/PESGM41954.2020.9281449","DOIUrl":"https://doi.org/10.1109/PESGM41954.2020.9281449","url":null,"abstract":"This paper presents a first-of-its-kind analysis of the North American Electric Reliability Corporation (NERC) Transmission Availability Data System (TADS) outage data by fault type for transmission lines in the North American bulk electric system (BES) for both sustained and momentary outages from 2015 through 2018, including all the element types reported in TADS: alternating current (AC) circuits, direct current (DC) circuits, transformers, and AC/DC back-to-back converters. The paper covers an extensive spectrum of outage data attributes influenced by or correlated to fault type. Findings for automatic outages of all elements are presented. A deeper analysis of AC Circuit elements is also presented with statistically significant findings regarding voltage class, outage initiation code, outage mode code, initiating cause code, and outage duration. The analysis of outages and fault-type statistics contributes to improvements in power system planning and operations, including but not limited to: identifying weak points and reliability trends; targeting the development of design standards; compliance with planning and operating standards; and evaluating the effect of maintenance practices on reliability.","PeriodicalId":106476,"journal":{"name":"2020 IEEE Power & Energy Society General Meeting (PESGM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128388906","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}
Pub Date : 2020-08-02DOI: 10.1109/PESGM41954.2020.9282144
M. L. Sosa-Rios, J. Pesente, Luís F. Costa-Alberto, R. Ramos
This paper studies the appearance of stable limit cycles in a power system model with a HVDC link near a synchronous generator unit. The HVDC system studied in this paper is a simplified version of the transmission system between the 50 Hz sector of Itaipu power plant and the Brazilian interconnected system. We show that the limit cycle coexists with a stable equilibrium condition and the system reaches the oscillation condition after a large perturbation. We also show that the limit cycle appears as a consequence of the interaction between the HVDC and PSS controllers. More precisely, the limit cycle is induced by the action of the Rectifier Alpha Minimum Limiter (RAML) of the HVDC controller interacting with the action of the PSS controller. This oscillating condition is undesired and understanding its cause is the main aim of this paper.
{"title":"Stable Limit Cycles Induced by the Interaction of HVDC Limiters and PSSs","authors":"M. L. Sosa-Rios, J. Pesente, Luís F. Costa-Alberto, R. Ramos","doi":"10.1109/PESGM41954.2020.9282144","DOIUrl":"https://doi.org/10.1109/PESGM41954.2020.9282144","url":null,"abstract":"This paper studies the appearance of stable limit cycles in a power system model with a HVDC link near a synchronous generator unit. The HVDC system studied in this paper is a simplified version of the transmission system between the 50 Hz sector of Itaipu power plant and the Brazilian interconnected system. We show that the limit cycle coexists with a stable equilibrium condition and the system reaches the oscillation condition after a large perturbation. We also show that the limit cycle appears as a consequence of the interaction between the HVDC and PSS controllers. More precisely, the limit cycle is induced by the action of the Rectifier Alpha Minimum Limiter (RAML) of the HVDC controller interacting with the action of the PSS controller. This oscillating condition is undesired and understanding its cause is the main aim of this paper.","PeriodicalId":106476,"journal":{"name":"2020 IEEE Power & Energy Society General Meeting (PESGM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129635795","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}
Pub Date : 2020-08-02DOI: 10.1109/PESGM41954.2020.9281995
J. Massignan, J. London, C. S. Vieira, Vladimiro Miranda
Power systems rely on a broad set of information and sensors to maintain reliable and secure operation. Proper processing of such information, to guarantee the integrity of power system data, is a requirement in any modern control centre, typically performed by state estimation associated with bad data processing algorithms. This paper shows that contrarily to a commonly assumed claim regarding bad data processing, in some cases of single gross error (GE) the noncritical measurement contaminated with GE does not present the largest normalized residual. Based on the analysis of the elements of the residual sensitivity matrix, the paper formally demonstrates that such claim does not always hold. Besides this demonstration, possible vulnerabilities for traditional bad data processing are mapped through the Undetectability Index (UI). Computational simulations carried out on IEEE 14 and IEEE 118 test systems provide insight into the paper proposition.
电力系统依靠广泛的信息和传感器来维持可靠和安全的运行。对这些信息进行适当的处理，以保证电力系统数据的完整性，是任何现代控制中心的要求，通常通过与不良数据处理算法相关的状态估计来完成。本文表明，与通常假设的关于不良数据处理的主张相反，在某些情况下，单粗误差(GE)污染的非关键测量并不呈现最大的归一化残差。通过对剩余灵敏度矩阵元素的分析，正式证明了这种说法并不总是成立的。除了演示之外，还通过Undetectability Index (UI)映射了传统的坏数据处理可能存在的漏洞。在IEEE 14和IEEE 118测试系统上进行的计算模拟提供了对论文命题的见解。
{"title":"Vulnerability of Largest Normalized Residual Test and b̂-Test to Gross Errors","authors":"J. Massignan, J. London, C. S. Vieira, Vladimiro Miranda","doi":"10.1109/PESGM41954.2020.9281995","DOIUrl":"https://doi.org/10.1109/PESGM41954.2020.9281995","url":null,"abstract":"Power systems rely on a broad set of information and sensors to maintain reliable and secure operation. Proper processing of such information, to guarantee the integrity of power system data, is a requirement in any modern control centre, typically performed by state estimation associated with bad data processing algorithms. This paper shows that contrarily to a commonly assumed claim regarding bad data processing, in some cases of single gross error (GE) the noncritical measurement contaminated with GE does not present the largest normalized residual. Based on the analysis of the elements of the residual sensitivity matrix, the paper formally demonstrates that such claim does not always hold. Besides this demonstration, possible vulnerabilities for traditional bad data processing are mapped through the Undetectability Index (UI). Computational simulations carried out on IEEE 14 and IEEE 118 test systems provide insight into the paper proposition.","PeriodicalId":106476,"journal":{"name":"2020 IEEE Power & Energy Society General Meeting (PESGM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127451294","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}
Pub Date : 2020-08-02DOI: 10.1109/PESGM41954.2020.9282000
Harshit Nath, Semih Isik, S. Bhattacharya
Voltage source converter (VSC) based Synchronous Static Compensator (STATCOM) is used for voltage regulation in transmission and distribution systems. VSC based on their control mechanism can be categorized as line-frequency switched and pulse width modulation converters. The line-frequency switched VSCs are based on angle-control method and hence also referred as angle-controlled VSCs. Over the past few years, angle-controlled STATCOMs have been deployed by the utilities for the purpose of voltage regulation and stability and to improve transmission capacity. Apart from the advantages offered to increase voltage transient, the on-site STATCOMs suffer from over-current trips and DC bus voltage oscillations under system faults. The negative sequence current during the faults tend to trip the overcurrent protection and possibly saturation of the interfacing transformer. It also leads to second order harmonic oscillations of the DC bus voltage which can trigger over-voltage protection. Dual angle control (DAC) is a control methodology that generates angle oscillations control signal during system faults which reduces the negative sequence current flow and dc-link oscillations compared to conventional angle controlled STATCOMs. The procedure was effective but deals with complexity of calculating the reference signal for angle oscillation. This paper proposes a simplified dual angle control based on DC-link voltage oscillation. The main advantage over the DAC is its simplified control structure, without compromising the performance in reduction of the negative sequence current and DC-link oscillations. Since the dual angle control is based on DClink voltage oscillation and hence it is called DC-link based dual angle control (DC-DAC). PSCAD/EMTDC results for 48-pulse STATCOM connected to a three-bus power system verify the validity of proposed DC-DAC control under unbalanced system condition and faults.
{"title":"A Simplified Approach based on Dual Angle-Controlled STATCOMs under System Faults","authors":"Harshit Nath, Semih Isik, S. Bhattacharya","doi":"10.1109/PESGM41954.2020.9282000","DOIUrl":"https://doi.org/10.1109/PESGM41954.2020.9282000","url":null,"abstract":"Voltage source converter (VSC) based Synchronous Static Compensator (STATCOM) is used for voltage regulation in transmission and distribution systems. VSC based on their control mechanism can be categorized as line-frequency switched and pulse width modulation converters. The line-frequency switched VSCs are based on angle-control method and hence also referred as angle-controlled VSCs. Over the past few years, angle-controlled STATCOMs have been deployed by the utilities for the purpose of voltage regulation and stability and to improve transmission capacity. Apart from the advantages offered to increase voltage transient, the on-site STATCOMs suffer from over-current trips and DC bus voltage oscillations under system faults. The negative sequence current during the faults tend to trip the overcurrent protection and possibly saturation of the interfacing transformer. It also leads to second order harmonic oscillations of the DC bus voltage which can trigger over-voltage protection. Dual angle control (DAC) is a control methodology that generates angle oscillations control signal during system faults which reduces the negative sequence current flow and dc-link oscillations compared to conventional angle controlled STATCOMs. The procedure was effective but deals with complexity of calculating the reference signal for angle oscillation. This paper proposes a simplified dual angle control based on DC-link voltage oscillation. The main advantage over the DAC is its simplified control structure, without compromising the performance in reduction of the negative sequence current and DC-link oscillations. Since the dual angle control is based on DClink voltage oscillation and hence it is called DC-link based dual angle control (DC-DAC). PSCAD/EMTDC results for 48-pulse STATCOM connected to a three-bus power system verify the validity of proposed DC-DAC control under unbalanced system condition and faults.","PeriodicalId":106476,"journal":{"name":"2020 IEEE Power & Energy Society General Meeting (PESGM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130161651","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}
Pub Date : 2020-08-02DOI: 10.1109/PESGM41954.2020.9281484
Zhengran Tang, Liwei Du, L. Xiong, Mingxian Li, Xun Ma, Guoxin Tang
Fast and accurate acquisition of voltage components are the basic requirement for grid-connected inverters to realize various control under unbalanced grids. In view of this situation, a delay sampling period filter (DSPF) algorithm, which rapidly separates each voltage component by delaying two sampling periods of voltage components under dq frame, is proposed. Besides, in view of the noise interference in the grid voltage, a delay operation period filter (DOPF) algorithm is proposed to scale the operation period and limit the noise level to an acceptable range. Finally, the corresponding model is built in MATLAB and physics experiment platform to verify the feasibility and priority of this method.
{"title":"A Fast Extraction of Positive Sequence Components with Noise Immunity in Unbalanced Conditions","authors":"Zhengran Tang, Liwei Du, L. Xiong, Mingxian Li, Xun Ma, Guoxin Tang","doi":"10.1109/PESGM41954.2020.9281484","DOIUrl":"https://doi.org/10.1109/PESGM41954.2020.9281484","url":null,"abstract":"Fast and accurate acquisition of voltage components are the basic requirement for grid-connected inverters to realize various control under unbalanced grids. In view of this situation, a delay sampling period filter (DSPF) algorithm, which rapidly separates each voltage component by delaying two sampling periods of voltage components under dq frame, is proposed. Besides, in view of the noise interference in the grid voltage, a delay operation period filter (DOPF) algorithm is proposed to scale the operation period and limit the noise level to an acceptable range. Finally, the corresponding model is built in MATLAB and physics experiment platform to verify the feasibility and priority of this method.","PeriodicalId":106476,"journal":{"name":"2020 IEEE Power & Energy Society General Meeting (PESGM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128961989","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}
Pub Date : 2020-08-02DOI: 10.1109/PESGM41954.2020.9281836
Soheil Mohseni, A. Brent, Daniel Burmester, Will N. Browne
This paper proposes a novel modeling approach for the efficient integration of demand response (DR) resources into the equipment capacity-planning problem of micro-grids based on Game Theory. The main advantage of this approach is that it determines the DR events based on the day-ahead system state estimates (in contrast to the conventional exogenetic demand-side management approaches), whilst protecting the customers’ welfare. A battery-less, 100%-renewable, gridindependent micro-grid is conceptualized, and the town Ohakune, New Zealand is used as a test-case to evaluate the effectiveness of the proposed modeling framework. The numerical simulation results indicate that the proposed approach achieves substantial (12.59%) savings in the life-cycle cost of the target system, as compared to the case where a time-of-use DR is implemented.
{"title":"A Game-Theoretic Approach to Model Interruptible Loads: Application to Micro-Grid Planning","authors":"Soheil Mohseni, A. Brent, Daniel Burmester, Will N. Browne","doi":"10.1109/PESGM41954.2020.9281836","DOIUrl":"https://doi.org/10.1109/PESGM41954.2020.9281836","url":null,"abstract":"This paper proposes a novel modeling approach for the efficient integration of demand response (DR) resources into the equipment capacity-planning problem of micro-grids based on Game Theory. The main advantage of this approach is that it determines the DR events based on the day-ahead system state estimates (in contrast to the conventional exogenetic demand-side management approaches), whilst protecting the customers’ welfare. A battery-less, 100%-renewable, gridindependent micro-grid is conceptualized, and the town Ohakune, New Zealand is used as a test-case to evaluate the effectiveness of the proposed modeling framework. The numerical simulation results indicate that the proposed approach achieves substantial (12.59%) savings in the life-cycle cost of the target system, as compared to the case where a time-of-use DR is implemented.","PeriodicalId":106476,"journal":{"name":"2020 IEEE Power & Energy Society General Meeting (PESGM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128970737","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}
Pub Date : 2020-08-02DOI: 10.1109/PESGM41954.2020.9281798
V. R. F. B. Souza, L. S. Barros, F. Costa, Guilherme P. Silva
The expansion of wind energy conversion systems (WECS) is largely due to the advancements of power electronics devices, especially in terms of processed power levels as well as robustness in grid fault situations. In this sense, the power converters participate in the conditioning and control of the power delivered by the generators, requiring an analysis of the impact caused by situations that lead to possible damages or lifetime shortening due to abnormal operations. Considering this problem, in this paper a case study is performed in order to evaluate the impact of the double fed induction generator (DFIG) low-voltage ride-through (LVRT) on the switches of the back-to-back converters. For this purpose, modeling of the DFIG-based WECS has been performed in MatLab/Simulink, including a linear model for the converter switches, which are of insulated gate bipolar transistor (IGBT) type. The analysis presents the main impacts on the IGBT internal currents and voltages under symmetrical and asymmetrical grid faults, making possible to guide the application of methods and techniques to minimize the impacts caused to the converters.
{"title":"Impact Analysis of Double Fed Induction Generator Low-Voltage Ride-Through on the Switches of the Back-to-Back Converters","authors":"V. R. F. B. Souza, L. S. Barros, F. Costa, Guilherme P. Silva","doi":"10.1109/PESGM41954.2020.9281798","DOIUrl":"https://doi.org/10.1109/PESGM41954.2020.9281798","url":null,"abstract":"The expansion of wind energy conversion systems (WECS) is largely due to the advancements of power electronics devices, especially in terms of processed power levels as well as robustness in grid fault situations. In this sense, the power converters participate in the conditioning and control of the power delivered by the generators, requiring an analysis of the impact caused by situations that lead to possible damages or lifetime shortening due to abnormal operations. Considering this problem, in this paper a case study is performed in order to evaluate the impact of the double fed induction generator (DFIG) low-voltage ride-through (LVRT) on the switches of the back-to-back converters. For this purpose, modeling of the DFIG-based WECS has been performed in MatLab/Simulink, including a linear model for the converter switches, which are of insulated gate bipolar transistor (IGBT) type. The analysis presents the main impacts on the IGBT internal currents and voltages under symmetrical and asymmetrical grid faults, making possible to guide the application of methods and techniques to minimize the impacts caused to the converters.","PeriodicalId":106476,"journal":{"name":"2020 IEEE Power & Energy Society General Meeting (PESGM)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126972428","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}
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