Temperature adaptive switching operation for distribution systems

This paper is to investigate the optimal switching problem of distribution systems by considering the customer load characteristics and the effect of temperature change to the customer loading. The load survey is applied to d erive the typical load patterns of residential, commercial, and industrial customer classes. The power consumption of sample test customers and weathe r information are used to solve the hourly temperature sensitivity of power consumption for each customer class. All the customers served by each dist ribution transformer are identified and their monthly energy consumption is retrieved from the customer information system in Taipower. The hourly loa ding of each service zone and its change due to temperature rise are obtain ed based on the customer load consumption and its temperature sensitivity. By performing the connectivity trace to find the feeder configuration and e xecuting the three-phase load flow analysis, the hourly current loading of line switches, distribution feeders, and main transformers in substations a re solved. The binary integer programming is then applied to determine the temperature adaptive optimal switching operation for noninterruptible load transfer among distribution feeders and main transformers.