A voltage regulation method for dispersed grid-connected PV systems under high-density connection |
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Authors: | Naosaka Okada Kiyoshi Takigawa |
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Affiliation: | Central Research Institute of Electric Power Industry (CRIEPI), 2-11-1, Iwado-Kita, Komae, Tokyo 201-8511, Japan |
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Abstract: | This paper describes a voltage regulation method for dispersed grid-connected PV systems under high-density connection. In the near future, many PV systems will be connected to distribution systems. The reverse power flow of the grid-connected PV systems will raise line voltage to the upper limit of the legal voltage range. In the first part of this paper we examine the voltage characteristics of a distribution system under high-density connection, while the second part of the paper describes a voltage regulation method for high-density PV connections, using reactive power proportional to global irradiance. The results of tests clearly demonstrate a restraining effect on voltage during the daytime and a smoothing effect on voltage fluctuation. |
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Keywords: | Voltage regulation method Grid-connected PV systems High-density connection Distribution system Reactive power control |
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