Zigurds KRISHANS

Professor Zigurds KRISHANS Head of the Laboratory of Power Systems Mathematical Modelling Institute of Physical Energetics Aizkraukles iela 21 Riga, LV-1006 Latvia Phones: +371 2558612; +371 7673127 Fax: +371 782 0339 E-mail: Emml@edi.lv

Born: May 1, 1930, Riga, Latvia

Interests:

• Electrical Networks, Power Stations and Systems
• Methods for Mathematical Modelling of Electrical Networks and Systems
• Methods for Development of Power Systems Planning
• Dynamic Optimisation Methods
• Decision Systems

Brief Description of Main Research:

• Dynamic Optimisation Method for Development Process of Complicated Systems “Optimal Initial States (OIS) Method”
• LDM System Family (LDM - Latvian Dynamic Model) for investments efficiency optimisation:
• LDM VZ - for medium and low voltage networks,
• LDM AV - for high and medium voltage networks,
• LDM ES - for power systems (power stations and transmission networks).

Languages: Latvian, Russian, German, English, French

Education:

• University of Latvia (Faculty of Mechanics) (Degree of Civil Engineer, specialisation in Electric Power Stations, Networks and Power Systems), cum laude, 1954
• Dr. sc.ing. (Candidate of Sciences in former USSR system, PhD in Western countries), Kiev Polytechnical institute, Kiev, USSR, 1961
  Thesis: “Selection of the Voltage Level for Rural Power Networks with Low Density of Loads”
• Dr.habil.sc. ing. (Doctor of Sciences in former USSR system), Moscow Power Engineering Institute, Moscow, USSR, 1985
  Thesis: “Dynamic Models for Optimal Planning of Electric Power Systems”
• Professor position at the Institute of Physical Energetics of  the Latvian Academy of Sciences, 1994

Experience:

• Junior Researcher, Senior Engineer and Senior Researcher, Laboratory of Power Engineering, Latvian Academy of Sciences, Institute of Physical Energetics, 1954-1969
• Head of the division, Laboratory of Power Systems Mathematical Modelling, Latvian Academy of Sciences, Institute of Physical Energetics,  1969-

Awards

• Latvian SSR State Prize in Sciences, 1965
• The Latvian Academy of Sciences Presidium Second Award, 1973
• The Latvian Academy of Sciences Presidium Second Award, 1975
• The Latvian Academy of Sciences Presidium First Award, 1980
• The Prize for excellent achievements in power systems of National Organization of Automatic Control of Latvia (LANO), 1999
• 1999^th Year Prize of Latvian Academy of Sciences and LATVENERGO for life contribution in energetic and engineering, 1999

Professional Activities and Memberships:

• Vice-President of the Baltic Association of Electric Power System Researchers, 1992-
• Professor, Riga Technical University: speciality - Power Systems Management, 1994 -
• Chairman, Board of Examiners, Faculty of Electrical and Power Engineering, Riga Technical University,  1990

• Member, Latvian Council of Science Expert Commission for Mechanics,

Machine Engineering and Energetics, 1994 -

• Member, Board of Latvian Electrical Power Society (LEB), 1996
• Member, Promotion Council of Riga Technical University, 1996 -
• Chairman, Inspection Committee of National Organization of Automatic Control of Latvia (LANO), 1994 -
• Member, Electrical Engineering Terminology Board of Latvian Electrical Engineering Committee, Latvian Academy of Sciences, 1997 -
• Member, Editorial Board of "Latvian Journal of Physics and Technical Sciences", 1970 -
• Member, Scientific Council of the Institute of Physical Energetics, 1970 -

Courses:

Riga Technical University:

• Power Utilities Management, 1996-
• Methods of Modelling and Optimisation for Power Utilities Management, 1997-
• Software Systems for Power Utilities Management, 1997-

• V.Dale, Z.Krishans, O.Paegle. Optimisation of Power Networks, under Consideration of Loads Increasing. Riga, 1964, 363 pp. (in Russian)
• V.Dale, Z.Krishans, O.Paegle. Dynamic Programming in Calculation of Power Networks Development. Riga, 1969, 190 pp. (in Russian)
• V.Dale, Z.Krishans, O.Paegle. Dynamic Methods for Analysis of Power System Networks Development. Riga, 1979, 259 pp. (in Russian)
• V.Dale, Z.Krishans, O.Paegle. Dynamic Optimisation of Electric Power Networks. Riga, 1990, 248 pp. (in Russian)
• Z.Krishans. Power Utilities Management. Riga, 1997, 122 pp. (in Latvian)
• Z.Krishans, V.Skujina, I.Staltmanis, K.Timmermanis. General Vocabulary, Part I: Generation, Transmission and Distribution of Electricity. Riga: Jumava, 1997, pp. 344. (in Latvian, English, German and Russian)
• A.Vanags, Z.Krishans. Electrical Networks and Systems, Part II (textbook). Riga: Petergailis, 1998, pp. 310. (in Latvian)
• Z.Krishans. Modelling and Optimisation Methods for Management of Electric Power Utilities. Riga, 1998, 128 pp. (in Latvian)

More than 140 publications, the last ones:

• Z.Krishans, H.Abramova, I.Greivule. Power System Development Optimisation by taking into account Electricity Conservation. - IAEE Eastern European Conference “Improved Energy Efficiency in Former Centrally Planned Economics”, Kaunas, Lithuania, October 19-21,1992, Conference Proceedings, pp. 245-249.
• Z.Krishans, V.Dale, H.Abramova, I.Greivule. Program System for Dynamic Optimisation of Electricity Source Development. - Latvian Journal of Physics and Technical Sciences, 1992, No 6, pp. 81-89.
• Z.Krishans, H.Abramova, L.Oleinikova, A.Kalpina. The Law-Governed Nature of Energy Supply System’s Optimal Development and the Software for its Investigation. - Latvian Journal of Physics and Technical Sciences, 1993, No 2, pp. 31-42.
• Z.Krishans, L.Oleinikova, V.Dale. Computer Program System LDM PS for Power System Economic Design. - Qualitative Use of Energy Resources and Energy Information Processing, Riga, 1993, pp. 46-49.
• Z.Krishans, L.Oleinikova, V.Dale. A Dynamic Model for Power System (Energy Sources-Transmission Networks) Development Optimisation under Uncertainty and Environmental Constraints. - Latvian Journal of Physics and Technical Sciences, 1993, No 5, pp. 10-26.
• Z.Krishans, V.Dale, V.Bochkarjova. Power System Mathematical Modelling. - Latvian Journal of Physics and Technical Sciences, 1996, No 1, pp. 22-27.
• Z.Krishans, H.Abramova, I.Greivule. Das lettische dynamische Modell LDM VS 95. - Baltic Electrical Engineering Review, 1996, No 1, pp. 2-5. (in German)
• V.Neimane, Z.Krishans. Multi-Criteria Analysis in Electric Power Network Planning. - Latvian Journal of Physics and Technical Sciences, 1997, No 4, pp. 28-35.
• Z.Krishans, V.Bochkareva, G.Andersson. Dynamic Model for Reinforcement Planning of Distribution System under Uncertainty. - Universities Power Engineering Conference UPEC’97, Manchester, UK, September 1997, Conference Proceedings, pp. 1089-1092.
• V.Neimane, G.Anderson, Z.Krishans. Multi-Criteria Analysis Application in Distribution Network Planning. - 33^rd Universities Power Engineering Conference UPEC’98, Napier University, Edinburgh, UK, September 8-10, 1998, Conference Proceedings, Vol. 2, pp. 791-794.
• Z.Krishans, V.Neimane, G.Andersson. Dynamic Model for Planning of Reinforcement Investments in Distribution Networks. - 13^th Power Systems Computation Conference, Trondheim, Norway, June 28 - July 2^nd, 1999, Conference Proceedings, Vol. 2, pp. 863-869.
• L.Krumm, Ü.Kurrel, A.Tauts, O.Terno, I.Zeidmanis, Z.Krishans, V.Dale, V.Putnins, I.Oleinikova. Theory and Methods of Complex Optimisation of the Interconnected Power System. - World Energy Council “Central and East European Energy Policies, markets and Technologies for the 21^st Century”, Vilnius, Lithuania, September 16-18, 1999, Proceedings, pp. 198-210.
• L.Krumm, Z.Krishans, A.Dragunevicius. Scientific and Technical Cooperation of the Baltic Countries: Performance and Development of the Interconnected Power System. - Proceedings of World Energy Council “Central and East European Energy Policies, markets and Technologies for the 21^st Century”, Lithuania, 1999, pp.211 – 214.
• Z.Krishans, I.Oleinikova, A.Mutule. A mathematical model for analysing the influence of independed (privately owned) electrical power plants on the structure of distribution electrical power networks. - Latvian Journal of Physics and Technical Science, 2002, Nr. 3, pp. 13 – 20 (in Latvian).
• Z.Krishans, I.Oleinikova, A.Kalpina, A.Mutule. Formation principles of the friendly to users systems of analysis and optimisation of investment efficiency. - Latvian Journal of Physics and Technical Science, 2002, Nr. 1, pp. 26 – 37 (in Latvian).
• Krishans Z., Oleinikova I., Mutule A., Runcs J., Kalpina A. Simulation software for technically- economic analysis of power supply reliability for distributed medium voltage networks. – Latvian Journal of Physics and Technical Sciences, 2006, 6, pp.35-47

Research Projects:

• Z.Krishans (Head of Project). Dynamic Method and its Application Technology for Electricity Supply Systems (Fuel-Power Plants-Networks-Consumers) Developments Optimisation, taking into account Engineering, Economical and Environmental Considerations. Latvian Council of Science (1994-1996).
• Z.Krishans (Head of Project). Scientific Foundation for Power System Efficiency Dynamic Analysis. Latvian Council of Science,  (1997-2000).
• Z.Krishans (Head of Project). Scientific Basis for Efficiency Analysis of Investments in Electrical Networks . Latvian Council of Science,(2001-).
• Z.Krishans (Head of Project). The Approach to Electrical Network Optimization under Liberalized Electricity Market  . Latvian Council of Science,(2005-).

Last update 27.10.2007