Seppo Hanninen - Academia.edu (original) (raw)
Papers by Seppo Hanninen
3rd ESPeDA Seminar on Equipment Ageing and Maintenance, 1992
BALTICA II - International Conference on Plant Life Management & Extension, 1992
In: Energy Visions 2050, 143-225 http://www.vtt.fi/files/publications/EnergyVisions\_2050.pdf
... Edellä mainittujen lisäksi kiitokset ansaitsevat TVO:n laitoksen instnimenttikunnossapidon he... more ... Edellä mainittujen lisäksi kiitokset ansaitsevat TVO:n laitoksen instnimenttikunnossapidon henkilökunta tutkimuksessa tarvittujen tietojen keruusta, ATV-kanslian Svenne Skagerman luokiteltujen vikatilastojen toimittamisesta sekä Ilkka Niemelä STUK:sta ja Risto Himanen TVO ...
International Review of Electrical Engineering-iree, 2012
It is expected that future power systems will require radical distributed control approaches to a... more It is expected that future power systems will require radical distributed control approaches to accommodate the significant expansion of renewable energy sources and other flexible grid devices. It is important to rapidly and efficiently respond to disturbances by, for example: utilising adaptive, wide-area protection schemes; proactive control of available grid resources (such as managing the fault level contribution from converter-interfaced generation) to optimise protection functionality; and taking post-fault action to ensure protection stability and optimal system operation. This paper analyses and highlights the protection functions which will be especially important to minimising the impact of disturbances in future power systems. These functions include: fast-acting wide-area protection methods using Phasor Measurement Units (PMUs); adaptive and "self-organising" protection under varying system conditions; protection with distributed Intelligent Electronic Devices...
2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262), 2001
A novel application of the neural network approach for transient based earth fault location in 20... more A novel application of the neural network approach for transient based earth fault location in 20 kV radial power distribution networks is presented. The items discussed are earth fault transients, signal pre-processing, ANN training and the performance of the proposed distance estimation method. The distribution networks considered are either unearthed or resonant earthed. Neural networks trained by the harmonic content
We are moving from a highly-centralized to a more decentralized energy system relying on more dis... more We are moving from a highly-centralized to a more decentralized energy system relying on more distributed generation, energy storage and a more active involvement of consumers through demand response. The present study makes an assessment of the status quo of decentralized energy systems, both in terms of technological developments and the legislative and policy framework. The analysis then discusses the current technical, economic and policy challenges and barriers facing decentralized energy production. Finally recommendations are provided in terms of the EU legislative and policy framework; infrastructure issues; R&D, investments and technological developments; monitoring and coordination of Member States incentive schemes; and SME support measures. IP/A/ITRE/ST/2009-16 JUNE 2010
International Review of Electrical Engineering-iree, 2013
A great deal of variation exists both within the power industry and academia to what exactly shou... more A great deal of variation exists both within the power industry and academia to what exactly should be included under the broad umbrella of a smart grid. This paper is based on a survey consisted of recently developed various smart grid concepts, architectures and details of associated technological demonstrations implemented worldwide. The survey is based on initiatives taken by EU and IEA (e.g. ETP, EEGI, EERA and IEA) and description of projects conducted in Europe and US (e.g. FENIX, ADDRESS, EU-DEEP, ADINE, GridWise and SEESGEN-ICT). The report presents drivers, visions and roadmaps to develop smart grids worldwide including China and India. The survey encompasses various smart grid concepts, i.e. development of virtual power plant, active demand in consumer networks, DER aggregation business, active distribution network and ICT applications to develop intelligent future grids. The comparison is carried out on the basis of technological and commercial aspects. In addition, the ...
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)
A new method is presented for the detection and location of high resistance earth faults in mediu... more A new method is presented for the detection and location of high resistance earth faults in medium voltage distribution networks. The systems considered are with unearthed or compensated neutral and the fault resistances covered in the range 5-160 kohm
International Conference on Energy Management and Power Delivery, 1998
An automatic computer model for power system fault location, fault isolation and supply restorati... more An automatic computer model for power system fault location, fault isolation and supply restoration is presented. The model works as an integrated part of SCADA and distribution network automation systems. Three techniques are used for fault location, distance computation, fault indicators and statistical data of fault frequencies. Once the faulty section is identified, it is automatically isolated and the supply
IEE Proceedings - Generation, Transmission and Distribution, 2002
The characteristics of the earth faults and related disturbances, recorded in medium voltage over... more The characteristics of the earth faults and related disturbances, recorded in medium voltage overhead distribution networks during the years 1998-1999 are described. Altogether 316 real cases were analysed. The use of subharmonic oscillation and harmonic distortion was investigated, as a means of anticipating faults. Arcing faults made up at least half of all the disturbances, and were especially predominant in the unearthed network. Fault resistances reached their minimum values near the beginning of the disturbances. The maximum currents that allowed for autoextinction in the unearthed network were comparatively small.
Electric Power Systems Research, 2000
A probabilistic method is presented for the detection and location of very high resistive, perman... more A probabilistic method is presented for the detection and location of very high resistive, permanent single-phase earth faults in medium voltage, radial operated distribution networks (20 kV). The systems considered have an unearthed or a compensated neutral and the fault resistances covered are in the range 5–220 kΩ. The algorithms of the method are based on the change of the neutral-voltage and zero-sequence currents, measured at the MV substation and also at the distribution line locations. The feasibility of the method was verified by an analysis based on system data recorded during field tests in real power systems.
3rd ESPeDA Seminar on Equipment Ageing and Maintenance, 1992
BALTICA II - International Conference on Plant Life Management & Extension, 1992
In: Energy Visions 2050, 143-225 http://www.vtt.fi/files/publications/EnergyVisions\_2050.pdf
... Edellä mainittujen lisäksi kiitokset ansaitsevat TVO:n laitoksen instnimenttikunnossapidon he... more ... Edellä mainittujen lisäksi kiitokset ansaitsevat TVO:n laitoksen instnimenttikunnossapidon henkilökunta tutkimuksessa tarvittujen tietojen keruusta, ATV-kanslian Svenne Skagerman luokiteltujen vikatilastojen toimittamisesta sekä Ilkka Niemelä STUK:sta ja Risto Himanen TVO ...
International Review of Electrical Engineering-iree, 2012
It is expected that future power systems will require radical distributed control approaches to a... more It is expected that future power systems will require radical distributed control approaches to accommodate the significant expansion of renewable energy sources and other flexible grid devices. It is important to rapidly and efficiently respond to disturbances by, for example: utilising adaptive, wide-area protection schemes; proactive control of available grid resources (such as managing the fault level contribution from converter-interfaced generation) to optimise protection functionality; and taking post-fault action to ensure protection stability and optimal system operation. This paper analyses and highlights the protection functions which will be especially important to minimising the impact of disturbances in future power systems. These functions include: fast-acting wide-area protection methods using Phasor Measurement Units (PMUs); adaptive and "self-organising" protection under varying system conditions; protection with distributed Intelligent Electronic Devices...
2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262), 2001
A novel application of the neural network approach for transient based earth fault location in 20... more A novel application of the neural network approach for transient based earth fault location in 20 kV radial power distribution networks is presented. The items discussed are earth fault transients, signal pre-processing, ANN training and the performance of the proposed distance estimation method. The distribution networks considered are either unearthed or resonant earthed. Neural networks trained by the harmonic content
We are moving from a highly-centralized to a more decentralized energy system relying on more dis... more We are moving from a highly-centralized to a more decentralized energy system relying on more distributed generation, energy storage and a more active involvement of consumers through demand response. The present study makes an assessment of the status quo of decentralized energy systems, both in terms of technological developments and the legislative and policy framework. The analysis then discusses the current technical, economic and policy challenges and barriers facing decentralized energy production. Finally recommendations are provided in terms of the EU legislative and policy framework; infrastructure issues; R&D, investments and technological developments; monitoring and coordination of Member States incentive schemes; and SME support measures. IP/A/ITRE/ST/2009-16 JUNE 2010
International Review of Electrical Engineering-iree, 2013
A great deal of variation exists both within the power industry and academia to what exactly shou... more A great deal of variation exists both within the power industry and academia to what exactly should be included under the broad umbrella of a smart grid. This paper is based on a survey consisted of recently developed various smart grid concepts, architectures and details of associated technological demonstrations implemented worldwide. The survey is based on initiatives taken by EU and IEA (e.g. ETP, EEGI, EERA and IEA) and description of projects conducted in Europe and US (e.g. FENIX, ADDRESS, EU-DEEP, ADINE, GridWise and SEESGEN-ICT). The report presents drivers, visions and roadmaps to develop smart grids worldwide including China and India. The survey encompasses various smart grid concepts, i.e. development of virtual power plant, active demand in consumer networks, DER aggregation business, active distribution network and ICT applications to develop intelligent future grids. The comparison is carried out on the basis of technological and commercial aspects. In addition, the ...
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)
A new method is presented for the detection and location of high resistance earth faults in mediu... more A new method is presented for the detection and location of high resistance earth faults in medium voltage distribution networks. The systems considered are with unearthed or compensated neutral and the fault resistances covered in the range 5-160 kohm
International Conference on Energy Management and Power Delivery, 1998
An automatic computer model for power system fault location, fault isolation and supply restorati... more An automatic computer model for power system fault location, fault isolation and supply restoration is presented. The model works as an integrated part of SCADA and distribution network automation systems. Three techniques are used for fault location, distance computation, fault indicators and statistical data of fault frequencies. Once the faulty section is identified, it is automatically isolated and the supply
IEE Proceedings - Generation, Transmission and Distribution, 2002
The characteristics of the earth faults and related disturbances, recorded in medium voltage over... more The characteristics of the earth faults and related disturbances, recorded in medium voltage overhead distribution networks during the years 1998-1999 are described. Altogether 316 real cases were analysed. The use of subharmonic oscillation and harmonic distortion was investigated, as a means of anticipating faults. Arcing faults made up at least half of all the disturbances, and were especially predominant in the unearthed network. Fault resistances reached their minimum values near the beginning of the disturbances. The maximum currents that allowed for autoextinction in the unearthed network were comparatively small.
Electric Power Systems Research, 2000
A probabilistic method is presented for the detection and location of very high resistive, perman... more A probabilistic method is presented for the detection and location of very high resistive, permanent single-phase earth faults in medium voltage, radial operated distribution networks (20 kV). The systems considered have an unearthed or a compensated neutral and the fault resistances covered are in the range 5–220 kΩ. The algorithms of the method are based on the change of the neutral-voltage and zero-sequence currents, measured at the MV substation and also at the distribution line locations. The feasibility of the method was verified by an analysis based on system data recorded during field tests in real power systems.