Comparative Study Improving Residential Load Factor Using Power Shifting and Load Shifting

Abstract

One the prob lem of electric power stab ility is due to load fluctuations in distrib ution system especialy during peak load conditions. One solution which is applied in Smart Grid scheme is through load shifting or power shifting. In load shifting the load with high power consumption which operates at peak load shifted its operations outside of the peak load o r s some loads with high power consumption do not operate at the same time, there is a load whose operating time is shifted to reduce peak power. Power shifting is used when energy from renewab le source not directly suplied to load b ut storage first and supplied to reduce high power consumption to reduce peak power. Low load factor, ratio b etween average power to peak power, may affect to power system operation. If load factor of residential load can keep in low, it will b e certainly help improve the stab ility of the power system. In this study we will examine the comparison of load shifting method with power shifting in improving load factor. Load shifting is done to water pumps and washing machines, b ecause washing machine is shiftab le load. Power shiftin g is made to the output power of the solar power plant, which is used to reduce peak power from the water pump. Test results show that power shifting can increase load factor value up to 54,9% while load shifting give load factor value equal to 43,9%.