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Aihara, Ryota,Yokoyama, Akihiko,Nomiyama, Fumitoshi,Kosugi, Narifumi The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.3
In recent years, a substantial amount of photovoltaic (PV) generations have been installed in power systems. However, the power output from the PV is random and intermittent in nature. Therefore, the PV generation poses many challenges to the power system operation. To evaluate the impact of the behavior of PV on power supply reliability, we have developed a power supply reliability evaluation model considering a large integration of PV generation into power system. As a result, the power supply reliability is getting worse as the PV penetration level increases. To solve this issue, we have proposed that pumped storage hydro power plant (PSHPP) is used effectively to improve the reliability. In this paper a cooperative scheduling method for the PSHPP and thermal power plants that makes it possible to improve both reliability and economy is presented.
Aihara, Ryota,Yokoyama, Akihiko,Nomiyama, Fumitoshi,Kosugi, Narifumi The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.1
In recent years, a substantial amount of photovoltaic (PV) generations have been installed in Japanese power systems. However, the power output from the PV is random and intermittent in nature. As is known, the PV generation poses many challenges to the power system operation. To evaluate impact of the behavior of PV, we developed power supply reliability evaluation model considering a large penetration of PV generation into the power system. As a result, power supply reliability is getting worse as the PV penetration increases. To mitigate these issues, we proposed that pumped storage power plant (PSPP) is used to improve the reliability. This paper presents a fundamental study on the impact of the operation scheduling of PSPP taking into account the excess power caused by PV generations on the power supply reliability, which is evaluated by Monte Carlo simulation.
Unstructured Information Management Projects at IBM Tokyo Research Laboratory
Takeda, Koichi,Watanabe, Hideo,Uramoto, Naohiko,Nomiyama, Hiroshi,Matsuzawa, Hirofumi,Nasukawa, Tetsuya,Nagano, Tohru,Murakami, Akiko,Takeuchi, Hironori,Kanayama, Hiroshi,Kobayashi, Mei,Aono, Masaki,I 한국정보처리학회 2004 정보처리학회지 Vol.11 No.2
A Study on Synchronous Stability Analysis of Power System with a Large Amount of PVs
Yoshida, Mitsutaka,Tsuji, Takao,Oyama, Tsutomu,Hashiguchi, Takuhei,Goda, Tadahiro,Kihara, Hidemi,Nomiyama, Fumitoshi,Suzuki, Naoto The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.2
To solve the energy and environmental issues, it is planned that a large amount of photovoltaics (PVs) are introduced in Japan. However, because the characteristic of PV output is different from that of conventional generators, it is possible that the synchronous stability changes due to a large amount of PVs. Additionally, supposing that some generators are stopped when PV output becomes large, decrease of inertia constant and change of power flow are also important factors for synchronous stability. Hence, in this paper, the synchronous stability of power system with a large amount of PVs is studied considering both the voltage characteristic of PV output and the change of system operation such as unit commitment. Specifically, the stability is evaluated from a viewpoint of critical clearing time (CCT) based on both the accelerating and decelerating energy in P-${\delta}$ curve. IEEJ-WEST10 model system is utilized as a simulation model.