Kondoh Laboratory
Department of Electrical Engineering
Faculty of Science and Technology
Tokyo University of Science
Outline
Solar energy and wind energy are sustainable and domestic energy resources, with no emission of greenhouse effect gases, no radioactive waste, and no seriously explosive disaster*. It is important to raise the share of such renewable energy in the whole energy consumption, in the view points of environmental impact, energy security, and a nation's trade balance. One of the most efficient way to use them is to integrate photovoltaic (PV) power and wind power into electric power systems.
However, when compared to the conventional large-scale power plants such as hydro, thermal, and nuclear power plants, PV power generation and wind power generation have disadvantages to distribute geographically due to low energy density (so it is called as 'dispersed generation') and to let output power fluctuate uncertainly according to variation of weather conditions. Since historically the electric power systems have been designed and operated while considering the one-way power flow from the fully-controlled conventional power plants to customers, various concerns are rising to integrate large amounts of PV and wind power.
This laboratory has been conducting researches on the integration of more PV and wind power into power systems as well as others on electric energy.
*: However, they may cause noise and landscape damages, and they also have some kinds of faults. At present, there is no ideal power plant without such problems and faults.
Members (in 2023)
[Staffs] Junji Kondoh (Associate Professor)
[Students] Two in 2nd year master's course, Three in 1st year master's course, Eight in 4th year undergraduate
Main Research Topics
J. Kondoh, K. Arai, T. Ichikawa, Y. Kawazoe, "Laboratory scale testbed by an engine generator to demonstrate frequency regulation", Grand Renewable Energy 2018, O-We-6-2, pp. 1-4 (2018.6)
K. Arai, K. Shibuya, J. Kondoh, "Demonstration Test of Frequency Regulation by Autonomous Load Control", 19th Int. Conf. Electrical Machines and Systems (ICEMS 2016), DS6G-4-13, pp. 1-4, Chiba, Japan (2016.11)
K. Shibuya, J. Kondoh, "Autonomous control of charging power of battery assisted vehicles for frequency regulation", Grand Renewable Energy 2014 Proceedings, P-Wd-1-27, pp. 1-4, 29 July 2014, Tokyo, Japan
J. Kondoh, "Demonstration Test of Heat Pump Water Heaters with Frequency Regulation", IEEJ Transactions on Power and Energy, Vol. 133, No. 11, Nov. 2013, pp. 910-917 (in Japanese)
J. Kondoh, "Experiment of an Electric Water Heater with Autonomous Frequency Regulation", IEEJ Transactions on Electrical and Electronic Engineering, Vol, 8, No. 3, pp. 223-228, May 2013
J. Kondoh, N. Lu, D. J. Hammerstrom, "An Evaluation of the Water Heater Load Potential for Providing Regulation Service", IEEE Transactions on Power Systems, Vol. 26, No. 3, pp. 1309-1316, Aug. 2011
J. Kondoh, "Autonomous Frequency Regulation by Controllable Loads to Increase Acceptable Wind Power Generation", Wind Energy, Vol. 13, No. 6, pp. 529-541, Sep. 2010
J. Kondoh, A. Shafiu, N. Jenkins, D. Pudjianto, G. Strbac, "Investigation of Direct Load Management Scheme While Considering End Users Comfort", IEEJ Transactions on Power and Energy, Vol. 129, No. 2, Feb. 2009, pp. 283-290 (in Japanese, translated into English in Electrical Engineering in Japan, Vol. 176, No. 3, p. 19-28, Aug. 2011)
J. Kondoh, "Direct Load Control for Wind Power Integration", IEEE PES General Meeting, July 25-28, 2011, Detroit, Michigan USA
J. Kondoh, "A Direct Load Management Scheme to Control Appliances and EVs While Considering End Users Comfort", Grid-Interop 2009, 17-19 Nov. 2009, Denver, CO, USA
J. Kondoh et al., "Future Consumed Power Estimation of Time Deferrable Loads for Frequency Regulation", CIRED 2005, 6-9 June 2005, Turin, Italy
J. Kondoh et al., "Consumed Power Control of Time Deferrable Loads for Frequency Regulation'', IEEE PES Power Systems Conference & Exposition, 10-13 October 2004, New York, NY USA
Configuration of a cooperative control system
H. Yamamoto, T. Kure, J. Kondoh, D. Kodaira, "Multi-point forecasting of photovoltaic power generation by light gradient boosting machine", Grand Renewable Energy 2022 Proceedings, pp. 1-4, 20 December 2022, Web Conference
H. Yamamoto, J. Kondoh, D. Kodaira, "Improving Forecast Reliability for Geographically Distributed Photovoltaic Generations", Energies, Vol. 15, No. 15, 5337, pp. 1-17 (2022.7)
T. Kure, H.D. Tsuchiya, Y. Kameda, H. Yamamoto, D. Kodaira, J. Kondoh, "Parameter Evaluation in Motion Estimation for Forecasting Multiple Photovoltaic Power Generation", Energies, Vol. 15, No. 8, 2855, pp. 1-20 (2022.4)
D. Kodaira, K. Tsukazaki, T. Kure, J. Kondoh, "Improving Forecast Reliability for Geographically Distributed Photovoltaic Generations", Energies, Vol. 14, No. 21, 7340, pp. 1-15 (2021.11)
T. Kure, Y. Miyazaki, J. Kondoh, Y. Kameda, "Comparison in Power-Forecasting Methods for Geographically Distributed PV Power Systems Using Their Previous Datasets", 4th International Conference on Smart Grid and Smart Cities (ICSGSC), pp. 24-28, Web Conference (2020.8)
S. Tamura, J. Kondoh, Y. Kushida, "Influence of voltage measurement accuracy on the impedance estimation by a power conditioning system", 4th International Conference on Smart Grid and Smart Cities (ICSGSC), pp. 44-49, Web Conference (2020.8)
Y. Miyazaki, Y. Kameda, J. Kondoh, "A Power-Forecasting Method for Geographically Distributed PV Power Systems using Their Previous Datasets", Energies, Vol. 12, No. 24, 4815, pp 1-14 (2019.12)
Y. Miyazaki, J. Kondoh, Y. Kameda, "Forecasting system using actual multipoint PV output", Grand Renewable Energy 2018, O-Pv-8-5, pp. 1-4 (2018.6)
Y. Kanesaka, K. Iida, J. Kondoh, "Analyses of String Current and Loss in Blocking Diodes in PV Power System", 19th Int. Conf. Electrical Machines and Systems (ICEMS 2016), DS4G-4-13, pp. 1-4, Chiba, Japan (2016.11)
J. Kondoh, Y. Itami, K. Mochizuki, H. Karasawa, Y. Kameda, "Influence of Diffuse Radiation on PV Power Variation", The International Conference on Electrical Engineering (ICEE) 2016, ID: 90413, pp. 1-2, July 2016, Okinawa, Japan
J. Kondoh, "Evaluation on Reduction of Output Suppression Loss by Cooperative Control of Voltage Profile in a Distribution System with a Large Amount of Photovoltaic Power Generation", IEEJ Transactions on Power and Energy, Vol. 130, No. 11, Nov. 2010, pp. 981-988 (in Japanese)
J. Kondoh et al., "Voltage Regulation in Distribution Systems by Hierarchically Cooperative Control", IEEJ Transactions on Power and Energy, Vol. 126, No. 10, Oct. 2006, pp. 994-1002 (in Japanese)
J. Kondoh et al., "Study on Voltage Regulation Methods for Distribution Systems with Dispersed Generators", IEEJ Transactions on Power and Energy, Vol. 124, No. 12, Dec. 2004, pp. 1432-1438 (in Japanese, translated into English in Electrical Engineering in Japan, Vol. 154, No. 4, pp. 16-23, Mar. 2006)
J. Kondoh, Marta Molinas, Hiroshi Yamaguchi, Tore Undeland, "Cooperative Control for Voltage Regulation with Wind Generation", Renewable Energy 2006, pp. 1752-1755, Oct. 2006, Makuhari, Chiba
J. Kondoh, "Validity of wind power for heavy winter demand in eastern Japan power systems", Frontiers in Energy Research, Vol. 11, 1185961, pp. 1-12, May 2023 (DOI: 10.3389/fenrg.2023.1185961)
J. Kondoh, "Winter Capacity Values of Wind Power in Eastern Japan Power Systems", Grand Renewable Energy 2022 Proceedings, pp. 1-4, 16 December 2022, Web Conference
J. Kondoh, K. Taguchi, "Compensation for a Delay in Response of a Thermopile-type Pyranometer", IEEJ Transactions on Power and Energy, Vol. 136, No. 2, Feb. 2016, pp. 222-223 (in Japanese)
J. Kondoh, "Capacity Values of Wind Power on Different Power Systems in Japan", Grand Renewable Energy 2014 Proceedings, O-Wd-11-1, pp. 1-4, 29 July 2014, Tokyo, Japan
Monthly peak demand and monthly average wind power in Hokkaido (2010)
A fixed speed flywheel energy storage system
T. Yamamoto, J. Kondoh, "Self-Inertia-Varying Fixed-Speed Flywheel Energy Storage System", IEEJ Journal of Industry Applications, Vol. 10, No. 6, pp. 638-642, (2021.11)
T. Yamamoto, J. Kondoh, "Development of a self-inertia-varying fixed-speed flywheel energy storage system", 23rd International Conference on Electrical Machines and Systems (ICEMS), pp. 1169-1172, Web Conference (2020.9)
J. Kondoh, T. Funamoto, T. Nakanishi, R. Arai, "Energy characteristics of a fixed-speed flywheel energy storage system with direct grid-connection", Energy, Vol. 165, Part B, pp 701-708 (2018.12)
J. Kondoh, K. Takeshima, Y. Ishida, H. Satoh, "Energy Balance Analysis for Fixed-Speed Flywheel Energy Storage System", 19th Int. Conf. Electrical Machines and Systems (ICEMS 2016), LS1C3, pp. 1-4, Chiba, Japan (2016.11)
J. Kondoh, D. Kodaira, "An Evaluation of Flicker Emissions from Small Wind Turbines", Energies, Vol. 14, No. 21, 7263, pp. 1-18 (2021.11)
K. Kashiwaya, J. Kondoh, K. Funabashi, "Total output power variation of several small wind turbines", Wind Engineering, DOI: 10.1177/0309524X20907987 Mar. 2020
J. Kondoh, H. Mizuno, T. Funamoto, "Fault Ride-Through Characteristics of Small Wind Turbines", Energies, Vol. 12, No. 23, 4587, pp 1-12 (2019.12)
K. Kashiwaya, J. Kondoh, "Analysis of voltage flicker by small wind power generation", IEEJ Transactions on Power and Energy, Vol. 138, No. 7, Jul. 2018, pp. 612-621 (in Japanese)
K. Kashiwaya, J. Kondoh, "Analysis of voltage flicker by multiple small wind turbines", Grand Renewable Energy 2018, O-We-5-5, pp. 1-4 (2018.6)
J. Kondoh, "Output power variation of a 5-kW class small wind turbine", Grand Renewable Energy 2018, O-We-6-1, pp. 1-4 (2018.6)
Nguyen Duc Tuyen, J. Kondoh, K. Matsumoto, T. Funamoto, "Remote Data Acquisition of a Small Wind Turbine", The International Conference on Electrical Engineering (ICEE) 2016, ID: 90006, pp. 1-6, July 2016, Okinawa, Japan
Nguyen Duc Tuyen, J. Kondoh, K. Matsumoto, T. Funamoto, "Review of international standards on FRT requirements for WT and suggestion to Japan context on SWT", The International Conference on Electrical Engineering (ICEE) 2016, ID: 90368, pp. 1-7, July 2016, Okinawa, Japan
H. Mizuno, J. Kondoh, "Self-excitation Method of a Synchronous Generator with a Voltage Doubling Rectifier", IEEJ Transactions on Industry Applications, Vol. 136, No. 5, May 2016, pp. 375-376 (in Japanese)
J. Kondoh, Y. Yasuda, H. Holttinen, "Differences of Wind Integration Methodologies between High Penetration Countries and Japan", Grand Renewable Energy 2014 Proceedings, P-Wd-2-46, pp. 1-4, 31 July 2014, Tokyo, Japan