Pub Date : 2006-09-01DOI: 10.1109/UPEC.2006.367738
L. Jian, Zhang Zhe, Yin Xianggen, Wen Minghao
In this paper, a new circuit implementation of a multi-level sinusoidal pulse width modulation (SPWM) for three-level neutral point clamped (NPC) inverter is presented. The SPWM control scheme is realized with only a single FPGA chip LFEC10 from LATTICE, Inc. and the programming language is very high speed integrated circuit hardware description language (VHDL). The filed programmable gate array (FPGA) chip is incorporated in a digital signal processor (DSP) TMS320VC33. It receives the commands with specified amplitude, frequency, primary phase, min pulse width and dead time from DSP, and finishes the asymmetrical regular sampling principle of SPWM function independently. This circuit structure can provide an effective, flexible, and safe solution to high-power inverters. The output gating signals of the proposed circuit are used to control the inverters of the drive system of a 6 kV/1000 kW motor. The simulation and experimental results are given to verify the implemented SPWM control system
{"title":"FPGA Implementation of a Multi-Level SPWM for Three-Level NPC Inverter","authors":"L. Jian, Zhang Zhe, Yin Xianggen, Wen Minghao","doi":"10.1109/UPEC.2006.367738","DOIUrl":"https://doi.org/10.1109/UPEC.2006.367738","url":null,"abstract":"In this paper, a new circuit implementation of a multi-level sinusoidal pulse width modulation (SPWM) for three-level neutral point clamped (NPC) inverter is presented. The SPWM control scheme is realized with only a single FPGA chip LFEC10 from LATTICE, Inc. and the programming language is very high speed integrated circuit hardware description language (VHDL). The filed programmable gate array (FPGA) chip is incorporated in a digital signal processor (DSP) TMS320VC33. It receives the commands with specified amplitude, frequency, primary phase, min pulse width and dead time from DSP, and finishes the asymmetrical regular sampling principle of SPWM function independently. This circuit structure can provide an effective, flexible, and safe solution to high-power inverters. The output gating signals of the proposed circuit are used to control the inverters of the drive system of a 6 kV/1000 kW motor. The simulation and experimental results are given to verify the implemented SPWM control system","PeriodicalId":184186,"journal":{"name":"Proceedings of the 41st International Universities Power Engineering Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134277487","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 : 2006-09-01DOI: 10.1109/UPEC.2006.367550
S. Weier, R. McMahon, P. Malliband
Calorimetry allows direct, accurate measurements of losses in power electronics systems. A small-scale version of a double chamber, closed type calorimeter for measuring losses up to 20 W is described in this paper. The design comprises an inner chamber with heat exchangers integrated into the top and bottom of the chamber, surrounded by insulation. This is enclosed by a temperature controlled air gap, within a further insulated enclosure. Calibration tests show that losses can be measured to a precision of +/- 0.4 W and ways of improving the accuracy further are discussed
{"title":"Calorimetry for Power Electronics","authors":"S. Weier, R. McMahon, P. Malliband","doi":"10.1109/UPEC.2006.367550","DOIUrl":"https://doi.org/10.1109/UPEC.2006.367550","url":null,"abstract":"Calorimetry allows direct, accurate measurements of losses in power electronics systems. A small-scale version of a double chamber, closed type calorimeter for measuring losses up to 20 W is described in this paper. The design comprises an inner chamber with heat exchangers integrated into the top and bottom of the chamber, surrounded by insulation. This is enclosed by a temperature controlled air gap, within a further insulated enclosure. Calibration tests show that losses can be measured to a precision of +/- 0.4 W and ways of improving the accuracy further are discussed","PeriodicalId":184186,"journal":{"name":"Proceedings of the 41st International Universities Power Engineering Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131713851","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 : 2006-09-01DOI: 10.1109/UPEC.2006.367647
I. Altawil, O.I. Hajier
This paper presents an adequate approach for teaching the sinusoidal pulse width modulation (SPWM) in AC voltage control regulators. In this paper the graphical user interface (GUI) functions, which constitute one of the important pillars of Matlab software, are developed to an easy-to-use educational software tool. Single-Phase AC voltage controller is mathematically modeled and then simulated using basic Matlab commands. GUI is implemented to construct an active link with these models. So that, instructors can demonstrate the change in SPWM system response due to parameter variation. An example, using the GUI, is provided to demonstrate the usefulness of the developed software
{"title":"Teaching the PWM AC Voltage Controller Using Matlab Graphical User Interface","authors":"I. Altawil, O.I. Hajier","doi":"10.1109/UPEC.2006.367647","DOIUrl":"https://doi.org/10.1109/UPEC.2006.367647","url":null,"abstract":"This paper presents an adequate approach for teaching the sinusoidal pulse width modulation (SPWM) in AC voltage control regulators. In this paper the graphical user interface (GUI) functions, which constitute one of the important pillars of Matlab software, are developed to an easy-to-use educational software tool. Single-Phase AC voltage controller is mathematically modeled and then simulated using basic Matlab commands. GUI is implemented to construct an active link with these models. So that, instructors can demonstrate the change in SPWM system response due to parameter variation. An example, using the GUI, is provided to demonstrate the usefulness of the developed software","PeriodicalId":184186,"journal":{"name":"Proceedings of the 41st International Universities Power Engineering Conference","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131079348","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 : 2006-09-01DOI: 10.1109/UPEC.2006.367520
S. Almeida, R. Pestana, F. Barbosa
Nowadays when utilities are faced with increasing requirements regarding quality of service, it is important to be aware that severe contingencies can happen, in an unpredictable way which far exceeds all the security principles used for planning and system operation. In any electricity transmission system, a security condition must be assured - either in steady or in transient state - otherwise the essential service provided to costumers could be severely jeopardized. Present day quality of service requirements that are imposed on the electrical utility companies force them to develop efficient processes to analyze and react to incidents that can happen in an unpredictable way and far exceed all the security principles used. The simulation and analysis of these scenarios allow us to minimize the risk of system unbalance and voltage collapse. The steady state simulations of the Portuguese transmission system were made in PSS/E software from Siemens Power Transmission Distribution, Inc., using savecases that represent pictures of the real system. The simulation results presented focus on aspects like energy not supplied, generation lost and topological changes resulting from an incident, which will affect mainly the power flow distribution within the grid elements that will remain in service (connected) and the voltage level in the system bus-bars. These results allow us to be better prepared to face these severe disturbances, defining procedures for emergency situation and training the control room operators.
{"title":"Severe Contingencies Analysis in Portuguese Transmission System","authors":"S. Almeida, R. Pestana, F. Barbosa","doi":"10.1109/UPEC.2006.367520","DOIUrl":"https://doi.org/10.1109/UPEC.2006.367520","url":null,"abstract":"Nowadays when utilities are faced with increasing requirements regarding quality of service, it is important to be aware that severe contingencies can happen, in an unpredictable way which far exceeds all the security principles used for planning and system operation. In any electricity transmission system, a security condition must be assured - either in steady or in transient state - otherwise the essential service provided to costumers could be severely jeopardized. Present day quality of service requirements that are imposed on the electrical utility companies force them to develop efficient processes to analyze and react to incidents that can happen in an unpredictable way and far exceed all the security principles used. The simulation and analysis of these scenarios allow us to minimize the risk of system unbalance and voltage collapse. The steady state simulations of the Portuguese transmission system were made in PSS/E software from Siemens Power Transmission Distribution, Inc., using savecases that represent pictures of the real system. The simulation results presented focus on aspects like energy not supplied, generation lost and topological changes resulting from an incident, which will affect mainly the power flow distribution within the grid elements that will remain in service (connected) and the voltage level in the system bus-bars. These results allow us to be better prepared to face these severe disturbances, defining procedures for emergency situation and training the control room operators.","PeriodicalId":184186,"journal":{"name":"Proceedings of the 41st International Universities Power Engineering Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132505940","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 : 2006-09-01DOI: 10.1109/UPEC.2006.367588
H. Okyere, Hassan NOURI, B. Miedzinski
This paper describes and analyses methods of controlling bus voltage through 5 and 11 level voltage-sourced inverter STATCOM. The performance analysis is based on the level of voltage support, harmonics, and degree of dc-link voltage balancing of the inverter in constraining the bus voltage within acceptable limits, whereas the performance comparison relates cost and efficiency. An attempt is also made to describe the basic concept of VSI-STATCOM from the first principle. Superiority of the 11 level in controlling the bus voltage due to a faster response and greater voltage support is also documented. Furthermore the paper describes the switching methods mathematically and demonstrates the merits and drawbacks of inverters experimentally
{"title":"Bus Voltage Control Through 5 and 11 Level Voltage-Sourced Inverter Statcom","authors":"H. Okyere, Hassan NOURI, B. Miedzinski","doi":"10.1109/UPEC.2006.367588","DOIUrl":"https://doi.org/10.1109/UPEC.2006.367588","url":null,"abstract":"This paper describes and analyses methods of controlling bus voltage through 5 and 11 level voltage-sourced inverter STATCOM. The performance analysis is based on the level of voltage support, harmonics, and degree of dc-link voltage balancing of the inverter in constraining the bus voltage within acceptable limits, whereas the performance comparison relates cost and efficiency. An attempt is also made to describe the basic concept of VSI-STATCOM from the first principle. Superiority of the 11 level in controlling the bus voltage due to a faster response and greater voltage support is also documented. Furthermore the paper describes the switching methods mathematically and demonstrates the merits and drawbacks of inverters experimentally","PeriodicalId":184186,"journal":{"name":"Proceedings of the 41st International Universities Power Engineering Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132660849","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 : 2006-09-01DOI: 10.1109/UPEC.2006.367515
J. Martínez-Crespo, L. Cuadros, J. Usaola
In the Spanish market, the transmission constraints are solved through an auction process by redispatching previously committed energy in the daily market. The Spanish system operator requires specific bids for increasing and also decreasing in an attempt to define a safe schedule. The new commitment is allocated to the best bids sent for the purpose of solving grid constraints. In general, these bids are simple. Hourly energy bids divided in blocks with their own bid prices, which will determine a time-decoupled optimization problem that could be solved on an hourly basis. Nevertheless, the thermal units which have not been previously committed in the daily market may present "complex conditions" that couple the different hours during the day. These complex conditions pose a time-coupled non-linear mixed-integer optimization problem that must be solved using decomposition methods. In this study, Benders decomposition is used to solve the time-coupled optimization problem, whereas a non-linear mixed-integer solver (SBB) is used to work out the time-decoupled problem on an hourly basis. Results of both coupled-time and de coupled-time optimization problems will be discussed. These results illustrate that simplifying the problem by decoupling it on an hourly basis yields suboptimal solutions. The models have been applied to the IEEE 24-bus test system
{"title":"An Optimal Approach to Solving Technical Constraints in the Spanish Electricity Market","authors":"J. Martínez-Crespo, L. Cuadros, J. Usaola","doi":"10.1109/UPEC.2006.367515","DOIUrl":"https://doi.org/10.1109/UPEC.2006.367515","url":null,"abstract":"In the Spanish market, the transmission constraints are solved through an auction process by redispatching previously committed energy in the daily market. The Spanish system operator requires specific bids for increasing and also decreasing in an attempt to define a safe schedule. The new commitment is allocated to the best bids sent for the purpose of solving grid constraints. In general, these bids are simple. Hourly energy bids divided in blocks with their own bid prices, which will determine a time-decoupled optimization problem that could be solved on an hourly basis. Nevertheless, the thermal units which have not been previously committed in the daily market may present \"complex conditions\" that couple the different hours during the day. These complex conditions pose a time-coupled non-linear mixed-integer optimization problem that must be solved using decomposition methods. In this study, Benders decomposition is used to solve the time-coupled optimization problem, whereas a non-linear mixed-integer solver (SBB) is used to work out the time-decoupled problem on an hourly basis. Results of both coupled-time and de coupled-time optimization problems will be discussed. These results illustrate that simplifying the problem by decoupling it on an hourly basis yields suboptimal solutions. The models have been applied to the IEEE 24-bus test system","PeriodicalId":184186,"journal":{"name":"Proceedings of the 41st International Universities Power Engineering Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131902664","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 : 2006-09-01DOI: 10.1109/UPEC.2006.367753
A. Saha, R. Lahiri, S. Chowdhury, S. Chowdhury, Y. Song, T. K. Panigrahi
After the formation of a distribution company (DISCOM), it takes a lot of initiatives to become a preferred provider of reliable and competitive power to people it serves and a favored company to work for. This work covers the initiatives taken by a DISCOM in different areas like O&M process improvement, commercial process improvement, and customer care process improvement to enhance all the related performances. Key challenges involving the initiatives are to deliver quality and cost effective electricity, ensure excellence in customer care, create a work environment that encourages teamwork & innovation. With the implementation of the initiatives, dramatic improvements in the performances in all the areas were observed which enabled the company to orient the core business operations with information systems and world-class practices for sustainable reforms
{"title":"Process Improvement Initiatives in a Newly Reformed Distribution Company","authors":"A. Saha, R. Lahiri, S. Chowdhury, S. Chowdhury, Y. Song, T. K. Panigrahi","doi":"10.1109/UPEC.2006.367753","DOIUrl":"https://doi.org/10.1109/UPEC.2006.367753","url":null,"abstract":"After the formation of a distribution company (DISCOM), it takes a lot of initiatives to become a preferred provider of reliable and competitive power to people it serves and a favored company to work for. This work covers the initiatives taken by a DISCOM in different areas like O&M process improvement, commercial process improvement, and customer care process improvement to enhance all the related performances. Key challenges involving the initiatives are to deliver quality and cost effective electricity, ensure excellence in customer care, create a work environment that encourages teamwork & innovation. With the implementation of the initiatives, dramatic improvements in the performances in all the areas were observed which enabled the company to orient the core business operations with information systems and world-class practices for sustainable reforms","PeriodicalId":184186,"journal":{"name":"Proceedings of the 41st International Universities Power Engineering Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125889972","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 : 2006-09-01DOI: 10.1109/UPEC.2006.367538
W. Cao, K. Bradley, I. French, J. Zhang, H. Zhang
This paper reviews the technological developments in calorimetry for accurate power loss measurement. The various topologies and features of calorimeters are described with special attention given to their merits and shortcomings. It is hoped to provide a guideline and quick reference for developing a calorimetric system
{"title":"A Review of Calorimetric Application for Accurate Power Loss Measurement","authors":"W. Cao, K. Bradley, I. French, J. Zhang, H. Zhang","doi":"10.1109/UPEC.2006.367538","DOIUrl":"https://doi.org/10.1109/UPEC.2006.367538","url":null,"abstract":"This paper reviews the technological developments in calorimetry for accurate power loss measurement. The various topologies and features of calorimeters are described with special attention given to their merits and shortcomings. It is hoped to provide a guideline and quick reference for developing a calorimetric system","PeriodicalId":184186,"journal":{"name":"Proceedings of the 41st International Universities Power Engineering Conference","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124707917","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 : 2006-09-01DOI: 10.1109/UPEC.2006.367599
S. Salman, S.F. Tan
Existing distribution networks are mostly designed to operate in radial mode without having generation units accommodated on them. The increase in penetration of embedded generations (EGs) into existing distribution network in recent years has resulted in bi-directional power flow and changes in network voltage profile. These in turn caused important impact on system protection of existing distribution network. The protection issues that have been identified include (i) increase of network fault level that requires costly upgrading of switchgears, (ii) disruption of feeder protection operation which could lead to unnecessary tripping of healthy feeders and reduction of the fault detection sensitivity of protection devices, (iii) the necessity of introducing new protection requirements particularly with regard to loss of mains (LOM) protection to avoid islanding condition (iv) the necessity of introducing the concept of intentional islanding under certain circumstances. Future distribution networks are likely to be operated in ring mode rather than radial in order to optimise the integrated capacity of embedded generations as reported in literature. The advantage of adopting ring mode operation includes, (i) increase of the reliability of electric power supplies and (ii) in the context of EGs, it eases the issues of voltage regulation. However, ring operation mode in addition to the presence of embedded generation could complicate the protection system, particularly, that related to feeder protection. Therefore special considerations are required for ring feeder protection compared to radial operation mode. This paper concerns with investigating the protection requirements of ring and radial distribution networks in the presence of embedded generations (EGs).
{"title":"Investigation into Protection of Active Distribution Network with High Penetration of Embedded Generation Using Radial and Ring Operation Mode","authors":"S. Salman, S.F. Tan","doi":"10.1109/UPEC.2006.367599","DOIUrl":"https://doi.org/10.1109/UPEC.2006.367599","url":null,"abstract":"Existing distribution networks are mostly designed to operate in radial mode without having generation units accommodated on them. The increase in penetration of embedded generations (EGs) into existing distribution network in recent years has resulted in bi-directional power flow and changes in network voltage profile. These in turn caused important impact on system protection of existing distribution network. The protection issues that have been identified include (i) increase of network fault level that requires costly upgrading of switchgears, (ii) disruption of feeder protection operation which could lead to unnecessary tripping of healthy feeders and reduction of the fault detection sensitivity of protection devices, (iii) the necessity of introducing new protection requirements particularly with regard to loss of mains (LOM) protection to avoid islanding condition (iv) the necessity of introducing the concept of intentional islanding under certain circumstances. Future distribution networks are likely to be operated in ring mode rather than radial in order to optimise the integrated capacity of embedded generations as reported in literature. The advantage of adopting ring mode operation includes, (i) increase of the reliability of electric power supplies and (ii) in the context of EGs, it eases the issues of voltage regulation. However, ring operation mode in addition to the presence of embedded generation could complicate the protection system, particularly, that related to feeder protection. Therefore special considerations are required for ring feeder protection compared to radial operation mode. This paper concerns with investigating the protection requirements of ring and radial distribution networks in the presence of embedded generations (EGs).","PeriodicalId":184186,"journal":{"name":"Proceedings of the 41st International Universities Power Engineering Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124892667","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 : 2006-09-01DOI: 10.1109/UPEC.2006.367749
A. Ishchenko, J. Myrzik, W. Kling
In this paper transient stability of an existing 10 kV distribution network with combined heat and power plants, microturbinesand wind turbines is analyzed. In order to do this, dynamic models of the network and generators have been created and simulations for faults at different network locations have been done. From the analysis it appears that the most critical parameter, which influences transient stability in the test network, is the inertia of a microturbine. Simulations have shown that there is linear relationship between inertia constant of microturbine and critical clearing time. After that it has been checked that the protection of DG satisfies transient stability requirements. In the end, the possibility for providing DG support to the network during and after disturbances using fault ride-through concept has been considered and simulations illustrate that DG protection can guarantee transient stability in this case as well.
{"title":"Transient Stability Analysis of Distribution Network with Dispersed Generation","authors":"A. Ishchenko, J. Myrzik, W. Kling","doi":"10.1109/UPEC.2006.367749","DOIUrl":"https://doi.org/10.1109/UPEC.2006.367749","url":null,"abstract":"In this paper transient stability of an existing 10 kV distribution network with combined heat and power plants, microturbinesand wind turbines is analyzed. In order to do this, dynamic models of the network and generators have been created and simulations for faults at different network locations have been done. From the analysis it appears that the most critical parameter, which influences transient stability in the test network, is the inertia of a microturbine. Simulations have shown that there is linear relationship between inertia constant of microturbine and critical clearing time. After that it has been checked that the protection of DG satisfies transient stability requirements. In the end, the possibility for providing DG support to the network during and after disturbances using fault ride-through concept has been considered and simulations illustrate that DG protection can guarantee transient stability in this case as well.","PeriodicalId":184186,"journal":{"name":"Proceedings of the 41st International Universities Power Engineering Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128973094","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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