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Author: search.filters.author.Goda, Tadahiro

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    Effective Selection Method of System Stabilization Control Function Mounted on Smart Inverter
    (2020-06-01)
    Kato, Koki
    ;
    Iwane, Yuji
    ;
    Ono, Seita
    ;
    Goda, Tadahiro
    ;
    Ngamroo, Issarachai
    This paper describes an effective selection method of the system stabilization control function mounted on the smart inverter (SI) for photovoltaic power generation (PV). When a large amount of PV are installed in power systems, the system frequency and voltage may deviate from the specified values. Therefore, the SI for PV is equipped with various system stabilization control functions such as Frequency-Watt control and Volt-Var control. However, in actual operation, it is not clear that which control function should be used with priority. In this paper, an effective selection of system stabilization control function according to the configuration and situation of the power system is proposed. Study results show that it is effective to give priority to the frequency control function based on the active power control in the upper system with high voltage level. On the other hand, the voltage control function by the reactive power control is suitable for the lower system with low voltage level.
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    Distributed frequency suppression method using inverter for photovoltaic power generation
    (2019-07-01)
    Kato, Koki
    ;
    Iwane, Yuji
    ;
    Horie, Shunsuke
    ;
    Goda, Tadahiro
    ;
    Yukita, Kazuto
    In this paper, the frequency variation suppression method for dispersed photovoltaic power generation (PV) is proposed. The variation of system frequency can occur due to the shortage of power generator adjustment under the massive installation of PV. In addition, the PV which is not equipped with frequency control results in the system frequency change. To handle this problem, a frequency control method by giving generator constants to distributed PVs is presented. Since, the distributed PVs cannot exchange information such as power generation amount and solar radiation amount etc., only the capacity of distributed PV is used. As a result, the generator constants of each PV can be calculated, and the frequency control can be performed. Study results confirm that the power generation output of PV which changes momentarily can be supplemented by giving the generator constants to distributed PVs.
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