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LDC-Control Parameters by Plane Determination Using Database Offline in Distribution Networks with PV System

Akihisa Kaneko 1, Yasuhiro Hayashi 1, Masakazu Ito 2, Takaya Anegawa 3, Hideyasu Hokazono 3, and Masayuki Oyama 3
1. Department of Electrical Engineering and Bioscience, Waseda University, Tokyo, Japan
2. Department of Electrical and Electronics Engineering, University of Fukui, Fukui, Japan
3. The Kansai Electric Power Co., Inc., Osaka, Japan
Abstract—This paper proposes a method to determine the Line Drop Compensator (LDC)-control parameters of an On-Load Tap Changer (OLTC) and Step Voltage Regulator (SVR) using a database with measured data from offline IT-switches. In a conventional determination method, the parameters are calculated based on the relationship between the sending voltage and the absolute value of current at the secondary side of the OLTC/SVR with a fixed power factor. However, the power factor changes with the interconnection of the Photovoltaic (PV) system. Hence, in the proposed method, LDC-control parameters are determined by the relationship between active current, reactive current, and sending voltage. In other words, the parameters are determined from the plane by taking these values as axes. The plane is determined by four measured data extracted from the database which have large voltage fluctuations in response to severe power flow. The effectiveness of the proposed method is verified by numerical simulations using a distribution system model with PV systems. Our results show that the proposed method can improve the amount of voltage violation by 35% compared to a conventional method. 
Index Terms—Distribution systems, IT-switches, Line Drop Compensator (LDC), On-Load Tap Changer (OLTC), Photovoltaic (PV) system, Step Voltage Regulator (SVR), voltage control

Cite: Akihisa Kaneko, Yasuhiro Hayashi,  Masakazu Ito, Takaya Anegawa, Hideyasu Hokazono, and Masayuki Oyama, "LDC-Control Parameters by Plane Determination Using Database Offline in Distribution Networks with PV System," International Journal of Electrical and Electronic Engineering & Telecommunications,  Vol. 9, No. 2, pp. 80-87, March 2020. Doi: 10.18178/ijeetc.9.2.80-87

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