Study on the Solar Photoelectricity Parallel Power Distribution Feeder Low Valtage System

• Main Authors: Sheng-Li Shao, 邵生立
• Other Authors: Chien-Yi Chen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/70860933802816986930

碩士 === 南榮科技大學 === 工程科技研究所碩士班 === 102 === When solar photovoltaic system links different capacity power types of low voltage transformers, number of circuit, wire size, will affect changes on the value of the fault current and system voltage. When the overhead transmission line or underground line is connected to a power line and power supply systems, due to the different line length and the parameters of the connection, the feeder voltage rate varies for the low-voltage side while the solar photovoltaic system parallelly connects with different regional distribution grid capacity. In this paper, according to parallel simulation with different capacity solar photovoltaic power distribution feeder areas of both high side and low side, the impact of changes in the system voltage and fault currents caused are analyzed. With the results obtained from the simulation, as the parallel solar power distribution is in the area of distribution feeders of different sizes or different capacity of the high-voltage side of the low-voltage side of the feeder, the longer the length is, the greater the capacity of the system voltage rate of changes. When the solar photovoltaic has parallel connection with grid capacity and the feeder length is different, the regional grid capacity limitations should be proposed. As for the fault current, the shorter the parallel area network photovoltaic length is, the greater the fault current will be. Therefore, this paper states that the protections of the client coordination failures need to be re-evaluated, and offers specific data for reference.