a ipakchi - Academia.edu (original) (raw)
Papers by a ipakchi
2022 IEEE PES Transactive Energy Systems Conference (TESC)
Competition, rising cost, and changes in technology have prompted many US electric utilities to c... more Competition, rising cost, and changes in technology have prompted many US electric utilities to consider new methods of power plant operation. One approach is the introduction of automation in an effort to increase productivity, reliability, efficiency, flexibility, and performance. The rapid advancement of computer technology has opened new opportunities for more sophisticated control and monitoring than ever before. The application
2010 Innovative Smart Grid Technologies (ISGT), 2010
One of the key promises of Smart Grid is to enable demand-side resources, e.g., demand response, ... more One of the key promises of Smart Grid is to enable demand-side resources, e.g., demand response, to provide energy balancing needed to support the intermittency of wind power and other variable generation. This calls for an end-to-end integration of capabilities from behind-the-meter to wholesale markets and from field area network to distribution grid and to transmission system operations. This could be considered as a “super Smart Grid use case” that brings together integrated benefits of distributed resources, Smart Grid infrastructure and power systems operations to deliver capabilities for improved environmental compliance and system economics.
2009 IEEE/PES Power Systems Conference and Exposition, 2009
One of the key regulatory considerations in review and approval of Advanced Metering Infrastructu... more One of the key regulatory considerations in review and approval of Advanced Metering Infrastructure (AMI) initiatives has been their enabling capability for demand response. It is envisioned that the Smart Grid of the future will support large penetrations of distributed, intermittent and demand-side resources coupled with system-wide demand response driven by economic and reliability signals. Management of such resources at high penetration levels will require significant levels of information management and integration, and operational coordination across functional groups spanning transmission and distribution operations, wholesale and retail supply, and customer services.
The Power Shape Monitoring System (PSMS) is a computer system for on-line monitoring and predicti... more The Power Shape Monitoring System (PSMS) is a computer system for on-line monitoring and prediction of reactor cores. It can be used for real-time monitoring of the core power distribution and the margin to the limiting value of the Departure from Nucleate Boiling Ratio (DNBR), load-following core performance analysis, and predictive analysis. The heart of the PSMS consists of a nodal code (NODEP-2/THERM-P) that computes the 3-D core power distribution. This code is coupled to a simplified nodal version of the COBRA-IIIC/MIT-2 thermal-hydraulic model to determine the DNBR. Activation of the calculations and review of the results is through user-friendly interactive software that can be tailored to the requirements and capabilities of the different categories of users through table-driven menus. The PSMS can be adapted to PWRs developed by any of the three PWR vendors in the US; however, from the technical point of view, the most difficult problem is associated with monitoring plants...
The Advanced Core Monitoring Framework (ACMF) provides a standard software framework within which... more The Advanced Core Monitoring Framework (ACMF) provides a standard software framework within which modules from any core monitoring systems could be readily installed. This enables a utility to implement, or have implemented, application and standard modules which are available from EPRI or from specific vendors. The framework thus enables a smooth transition between different fuel vendors by allowing the use of the most appropriate core monitoring capabilities, while at the same time providing for continuity of usage and support. This computer code manual documents ACMF software through its initial implementation phase, completed on December 31, 1985.
Compact Analyzer is a computer system that combines dynamic simulation models with interactive an... more Compact Analyzer is a computer system that combines dynamic simulation models with interactive and color graphics user interface functions to provide a cost-effective simulator for dynamic analysis and evaluation of power plant operation, with engineering and training applications. Most dynamic simulation packages such as RETRAN and TRAC are designed for a batch-mode operation. With advancements in computer technology and man/machine interface capabilities, it is possible to integrate such codes with interactive and graphic functions into advanced simulators. The US Nuclear Regulatory Commission has sponsored development of plant analyzers with such characteristics. The Compact Analyzer is an Electric Power Research Institute (EPRI)-sponsored project, which currently utilizes the EPRI modular modeling system (MMS) for process simulation, and uses an adaptable color graphic package for dynamic display of the simulation results.
The Space Shuttle Launch Processing System (LPS) automation technology is developed by NASA for t... more The Space Shuttle Launch Processing System (LPS) automation technology is developed by NASA for the support of the shuttle launch control process. The LPS is based on a software package composed of a high-level real-time programming language and the associated control logic and the user interface facilities. The primary mission of the LPS is to prevent hazardous manual intervention and to allow automatic reaction to out of tolerance events. It also supports interactive and automated control techniques and provides graphical displays for monitoring and control tasks. The LPS programming language includes rule-based capabilities to monitor data, to initiate control actions, and to override operator actions which are inconsistent with the rule set. The NASA's Space Shuttle Launch Processing System has been demonstrated to Nuclear Regulatory Commission (NRC) for an application to nuclear power plant. Using the TMI accident as a reference, the demonstration system shows how the LPS t...
Transactions of the American Nuclear Society, 1985
Ex-core detectors are used in pressurized water reactors (PWRs) to provide continuous information... more Ex-core detectors are used in pressurized water reactors (PWRs) to provide continuous information on the core-average power distribution. The detector's response depends on power level as well as core power distribution, and the signals from individual detectors are used in measuring gross power shapes represented by axial offset (AO) and radial quadrant tilt. In full-power operation, those detectors provide information for power distribution monitoring, control, and protection systems. With the power shape monitoring system (PSMS), one can perform an on-line adjustment of the nodal code to match the detector readings partially and to statistically characterize the remaining errors. The AO was used as the phase shift indicator. It obtains the measured AO from ex-core readings and then adjusts the model to make the predicted AO match the measured AO each time the on-line three-dimensional nodal calculations are performed. The average axial error of the power distribution is an im...
The recent advancements in high performance small computers, software techniques, and user interf... more The recent advancements in high performance small computers, software techniques, and user interface graphics workstation, has resulted in the development of the computer aided engineering tools in many different areas. The EPRI Compact Analyzer is such a system, that combines modular and accurate models with a flexible and adaptable software into a cost effective simulation workstation. Because of the reduced cost and ease of use, the Compact Analyzer can be applied to a broad range of applications which require process modeling in power plants. This report presents the results of an EPRI sponsored project (RP2395-2) for design and development of an interactive, and color graphics based simulator for power plant analysis.
This report describes the results of EPRI sponsored project RP1184-12, for the development of an ... more This report describes the results of EPRI sponsored project RP1184-12, for the development of an MMS color-graphics analyzer and specifications for fossil-fuel power plant simulators. The system is called Compact Analyzer and was originally designed and developed under EPRI RP2395-2 for nuclear power plant applications. Compact Analyzer is a CRT-based, non-replica simulator with features for both engineering and training applications. This report provides guidelines for the development of power plant simulator specifications, and describes the design of the EPRI Compact Analyzer system, as well as its application as a simulator to fossil-fuel power plants. In this demonstration a full plant model, including the control system, is interfaced with interactive user graphic displays built on an IBM PC. A hierarchical set of displays represent the plant in an increasing level of detail. Displays, in addition to the process schematic diagrams and trend plots, include a representation of c...
The Power Shape Monitoring System (PSMS) is a computer system for on-line monitoring and predicti... more The Power Shape Monitoring System (PSMS) is a computer system for on-line monitoring and prediction of reactor cores. The heart of the PSMS consists of a nodal code (NODEP-2/THERM-P) that computes the 3-D core power distribution. This code is coupled to a simplified nodal version of the COBRA-IIIC/MIT-2 thermal-hydraulic model to determine the DNBR. Activation of the calculations and review of the results is through user-friendly interactive software that can be tailored to the requirements and capabilities of the different categories of users through table-driven menus. The PSMS can be adapted to PWRs developed by any of the three PWR vendors in the US; however, from the technical point of view, the most difficult problem is associated with monitoring plants without fixed in-core neutron detectors. It has been demonstrated that adaptation of the nodal code to partially fit the available in-core detector readings, followed by a statistical characterization of the remaining errors, r...
Proceedings of the First International Forum on Applications of Neural Networks to Power Systems
... The elapsed time between these events has a dominant impact on the post-contingency ... This ... more ... The elapsed time between these events has a dominant impact on the post-contingency ... This environment supports concurrent processes which can employ diverse techniques while sharing the ... difference between small and large values and thus reduce the effects of masking ...
The recent advancements in high performance small computers, software techniques, and user interf... more The recent advancements in high performance small computers, software techniques, and user interface graphics workstation, has resulted in the development of the computer aided engineering tools in many different areas. The EPRI Compact Analyzer is such a system, that combines modular and accurate models with a flexible and adaptable software into a cost effective simulation workstation. Because of the reduced
2010 Innovative Smart Grid Technologies (ISGT), 2010
IEEE Computer Applications in Power, 1993
The Advanced Core Monitoring Framework (ACMF) provides a standard software framework within which... more The Advanced Core Monitoring Framework (ACMF) provides a standard software framework within which modules from any core monitoring systems could be readily installed. This enables a utility to implement, or have implemented, application and standard modules which are available from EPRI or from specific vendors. The framework thus enables a smooth transition between different fuel vendors by allowing the use of the most appropriate core monitoring capabilities, while at the same time providing for continuity of usage and support. This computer code manual documents ACMF software through its initial implementation phase, completed on December 31, 1985.
Nuclear power plant operations and safety rely on the proper operation of the plant monitoring, c... more Nuclear power plant operations and safety rely on the proper operation of the plant monitoring, controls and protection systems. These systems in turn, depend on plant instrumentation for a correct reporting of equipment status and the thermofluid condition of the process. The incorrect reading can be due to instrument failure or drift in calibration. Plant instrumentation are therefore recalibrated on a periodic basis. This is a time consuming and costly operation. This paper presents the preliminary results of an EPRI sponsored research project to develop a neural network-based analytical redundancy technique for instrument calibration reduction. The neural network will be used to predict the reading of a target instrument using readings from other dissimilar instruments. This technique is similar to the conventional on-line parameter identification and model-based observer methods.
2022 IEEE PES Transactive Energy Systems Conference (TESC)
Competition, rising cost, and changes in technology have prompted many US electric utilities to c... more Competition, rising cost, and changes in technology have prompted many US electric utilities to consider new methods of power plant operation. One approach is the introduction of automation in an effort to increase productivity, reliability, efficiency, flexibility, and performance. The rapid advancement of computer technology has opened new opportunities for more sophisticated control and monitoring than ever before. The application
2010 Innovative Smart Grid Technologies (ISGT), 2010
One of the key promises of Smart Grid is to enable demand-side resources, e.g., demand response, ... more One of the key promises of Smart Grid is to enable demand-side resources, e.g., demand response, to provide energy balancing needed to support the intermittency of wind power and other variable generation. This calls for an end-to-end integration of capabilities from behind-the-meter to wholesale markets and from field area network to distribution grid and to transmission system operations. This could be considered as a “super Smart Grid use case” that brings together integrated benefits of distributed resources, Smart Grid infrastructure and power systems operations to deliver capabilities for improved environmental compliance and system economics.
2009 IEEE/PES Power Systems Conference and Exposition, 2009
One of the key regulatory considerations in review and approval of Advanced Metering Infrastructu... more One of the key regulatory considerations in review and approval of Advanced Metering Infrastructure (AMI) initiatives has been their enabling capability for demand response. It is envisioned that the Smart Grid of the future will support large penetrations of distributed, intermittent and demand-side resources coupled with system-wide demand response driven by economic and reliability signals. Management of such resources at high penetration levels will require significant levels of information management and integration, and operational coordination across functional groups spanning transmission and distribution operations, wholesale and retail supply, and customer services.
The Power Shape Monitoring System (PSMS) is a computer system for on-line monitoring and predicti... more The Power Shape Monitoring System (PSMS) is a computer system for on-line monitoring and prediction of reactor cores. It can be used for real-time monitoring of the core power distribution and the margin to the limiting value of the Departure from Nucleate Boiling Ratio (DNBR), load-following core performance analysis, and predictive analysis. The heart of the PSMS consists of a nodal code (NODEP-2/THERM-P) that computes the 3-D core power distribution. This code is coupled to a simplified nodal version of the COBRA-IIIC/MIT-2 thermal-hydraulic model to determine the DNBR. Activation of the calculations and review of the results is through user-friendly interactive software that can be tailored to the requirements and capabilities of the different categories of users through table-driven menus. The PSMS can be adapted to PWRs developed by any of the three PWR vendors in the US; however, from the technical point of view, the most difficult problem is associated with monitoring plants...
The Advanced Core Monitoring Framework (ACMF) provides a standard software framework within which... more The Advanced Core Monitoring Framework (ACMF) provides a standard software framework within which modules from any core monitoring systems could be readily installed. This enables a utility to implement, or have implemented, application and standard modules which are available from EPRI or from specific vendors. The framework thus enables a smooth transition between different fuel vendors by allowing the use of the most appropriate core monitoring capabilities, while at the same time providing for continuity of usage and support. This computer code manual documents ACMF software through its initial implementation phase, completed on December 31, 1985.
Compact Analyzer is a computer system that combines dynamic simulation models with interactive an... more Compact Analyzer is a computer system that combines dynamic simulation models with interactive and color graphics user interface functions to provide a cost-effective simulator for dynamic analysis and evaluation of power plant operation, with engineering and training applications. Most dynamic simulation packages such as RETRAN and TRAC are designed for a batch-mode operation. With advancements in computer technology and man/machine interface capabilities, it is possible to integrate such codes with interactive and graphic functions into advanced simulators. The US Nuclear Regulatory Commission has sponsored development of plant analyzers with such characteristics. The Compact Analyzer is an Electric Power Research Institute (EPRI)-sponsored project, which currently utilizes the EPRI modular modeling system (MMS) for process simulation, and uses an adaptable color graphic package for dynamic display of the simulation results.
The Space Shuttle Launch Processing System (LPS) automation technology is developed by NASA for t... more The Space Shuttle Launch Processing System (LPS) automation technology is developed by NASA for the support of the shuttle launch control process. The LPS is based on a software package composed of a high-level real-time programming language and the associated control logic and the user interface facilities. The primary mission of the LPS is to prevent hazardous manual intervention and to allow automatic reaction to out of tolerance events. It also supports interactive and automated control techniques and provides graphical displays for monitoring and control tasks. The LPS programming language includes rule-based capabilities to monitor data, to initiate control actions, and to override operator actions which are inconsistent with the rule set. The NASA's Space Shuttle Launch Processing System has been demonstrated to Nuclear Regulatory Commission (NRC) for an application to nuclear power plant. Using the TMI accident as a reference, the demonstration system shows how the LPS t...
Transactions of the American Nuclear Society, 1985
Ex-core detectors are used in pressurized water reactors (PWRs) to provide continuous information... more Ex-core detectors are used in pressurized water reactors (PWRs) to provide continuous information on the core-average power distribution. The detector's response depends on power level as well as core power distribution, and the signals from individual detectors are used in measuring gross power shapes represented by axial offset (AO) and radial quadrant tilt. In full-power operation, those detectors provide information for power distribution monitoring, control, and protection systems. With the power shape monitoring system (PSMS), one can perform an on-line adjustment of the nodal code to match the detector readings partially and to statistically characterize the remaining errors. The AO was used as the phase shift indicator. It obtains the measured AO from ex-core readings and then adjusts the model to make the predicted AO match the measured AO each time the on-line three-dimensional nodal calculations are performed. The average axial error of the power distribution is an im...
The recent advancements in high performance small computers, software techniques, and user interf... more The recent advancements in high performance small computers, software techniques, and user interface graphics workstation, has resulted in the development of the computer aided engineering tools in many different areas. The EPRI Compact Analyzer is such a system, that combines modular and accurate models with a flexible and adaptable software into a cost effective simulation workstation. Because of the reduced cost and ease of use, the Compact Analyzer can be applied to a broad range of applications which require process modeling in power plants. This report presents the results of an EPRI sponsored project (RP2395-2) for design and development of an interactive, and color graphics based simulator for power plant analysis.
This report describes the results of EPRI sponsored project RP1184-12, for the development of an ... more This report describes the results of EPRI sponsored project RP1184-12, for the development of an MMS color-graphics analyzer and specifications for fossil-fuel power plant simulators. The system is called Compact Analyzer and was originally designed and developed under EPRI RP2395-2 for nuclear power plant applications. Compact Analyzer is a CRT-based, non-replica simulator with features for both engineering and training applications. This report provides guidelines for the development of power plant simulator specifications, and describes the design of the EPRI Compact Analyzer system, as well as its application as a simulator to fossil-fuel power plants. In this demonstration a full plant model, including the control system, is interfaced with interactive user graphic displays built on an IBM PC. A hierarchical set of displays represent the plant in an increasing level of detail. Displays, in addition to the process schematic diagrams and trend plots, include a representation of c...
The Power Shape Monitoring System (PSMS) is a computer system for on-line monitoring and predicti... more The Power Shape Monitoring System (PSMS) is a computer system for on-line monitoring and prediction of reactor cores. The heart of the PSMS consists of a nodal code (NODEP-2/THERM-P) that computes the 3-D core power distribution. This code is coupled to a simplified nodal version of the COBRA-IIIC/MIT-2 thermal-hydraulic model to determine the DNBR. Activation of the calculations and review of the results is through user-friendly interactive software that can be tailored to the requirements and capabilities of the different categories of users through table-driven menus. The PSMS can be adapted to PWRs developed by any of the three PWR vendors in the US; however, from the technical point of view, the most difficult problem is associated with monitoring plants without fixed in-core neutron detectors. It has been demonstrated that adaptation of the nodal code to partially fit the available in-core detector readings, followed by a statistical characterization of the remaining errors, r...
Proceedings of the First International Forum on Applications of Neural Networks to Power Systems
... The elapsed time between these events has a dominant impact on the post-contingency ... This ... more ... The elapsed time between these events has a dominant impact on the post-contingency ... This environment supports concurrent processes which can employ diverse techniques while sharing the ... difference between small and large values and thus reduce the effects of masking ...
The recent advancements in high performance small computers, software techniques, and user interf... more The recent advancements in high performance small computers, software techniques, and user interface graphics workstation, has resulted in the development of the computer aided engineering tools in many different areas. The EPRI Compact Analyzer is such a system, that combines modular and accurate models with a flexible and adaptable software into a cost effective simulation workstation. Because of the reduced
2010 Innovative Smart Grid Technologies (ISGT), 2010
IEEE Computer Applications in Power, 1993
The Advanced Core Monitoring Framework (ACMF) provides a standard software framework within which... more The Advanced Core Monitoring Framework (ACMF) provides a standard software framework within which modules from any core monitoring systems could be readily installed. This enables a utility to implement, or have implemented, application and standard modules which are available from EPRI or from specific vendors. The framework thus enables a smooth transition between different fuel vendors by allowing the use of the most appropriate core monitoring capabilities, while at the same time providing for continuity of usage and support. This computer code manual documents ACMF software through its initial implementation phase, completed on December 31, 1985.
Nuclear power plant operations and safety rely on the proper operation of the plant monitoring, c... more Nuclear power plant operations and safety rely on the proper operation of the plant monitoring, controls and protection systems. These systems in turn, depend on plant instrumentation for a correct reporting of equipment status and the thermofluid condition of the process. The incorrect reading can be due to instrument failure or drift in calibration. Plant instrumentation are therefore recalibrated on a periodic basis. This is a time consuming and costly operation. This paper presents the preliminary results of an EPRI sponsored research project to develop a neural network-based analytical redundancy technique for instrument calibration reduction. The neural network will be used to predict the reading of a target instrument using readings from other dissimilar instruments. This technique is similar to the conventional on-line parameter identification and model-based observer methods.