Abstract
This paper proposed coordinated voltage control between Photovoltaics (PVs) and on load tap changer (OLTC) for reducing the number of operation of OLTC based on PV and load forecasting. Nowadays, PV compensates the reactive power for improving voltage problems such as voltage violation and voltage fluctuation due to the high PV penetration in distribution system. Therefore, the direction of current of system is different from the conventional direction. Due to this reason, there is a probability that the number of operation of OLTC using line drop compensator method has increased than conventional system. This problem causes the malfunction of OLTC and financial burden for system operator. Also reactive power compensation of PV increases the line loss of the system which can also increase the financial burden of system operator. To solve these problems, proposed coordinated control which is realized by optimization algorithm for line loss reduction with constraints of OLTC for reducing the number of operation of OLTC based on forecasted data is proposed.
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