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This study proposes a method to estimate the standard deviation (STD) of total power output fluctuation of high penetration photovoltaic power generation system (HP-PVS) dispersed in large area, so that the impact of HP-PVS on the load frequency control is discussed. First, by using the data of horizontal global insolation observed at 5 points in 25 km × 25 km area, the practical usefulness of STD...
Summary form only given. This paper proposes applying the 2-stage diagonally implicit Runge-Kutta (2S-DIRK) method of numerical integration to the calculation of electromagnetic transients (EMTs) in a power system. The accuracy and the numerical stability of 2S-DIRK are almost the same as those of the trapezoidal method, while 2S-DIRK does not produce sustained numerical oscillation due to a sudden...
Generators with a long time delay in output power response, such as large-capacity coal-fired generators, have seldom been used for load frequency control (LFC) in Japan. The electric power supply mix at some electric power companies is likely to be accompanied by a lack of capacity to regulate system frequency in the near future. The authors of this paper therefore have proposed a new LFC logic to...
Electrical phenomena in power systems tend to exhibit higher nonlinearity, because more efficient operation accompanies severer power transfer. In such situations, there might exist some limitation to the use of conventional linear control design scheme due to the nonlinearity of power systems. As for consideration of the nonlinearity, we have developed a nonlinear stability analysis method based...
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