Volume 13, No.2, Mei 2019 ELECTRICIAN – Jurnal Rekayasa dan Teknologi Elektro Forecasting Load on PT PLN (Persero) Metro Substations (GI) Using Combined Methods for Electrical Needs in Metro City 2019 - 2029 Candra Saigustia 1 , Kiki Kananda 2 1 Program Studi Teknik Elektro Sekolah Tinggi Teknologi Nusantara Lampung 2 Program Studi Teknik Elektro, Institut Teknologi Sumatera 1 saigustia@gmail.com 2 khiekykananda@gmail.com Abstract — Electricity consumption in Metro City has increased along with the increase in population, economic activity, technological progress and growth of households. Electrical energy is needed for the interests of industry, households and other activities as well as to support increasingly advanced technological developments The researcher used load forecasting with a combined method based on economic growth, population growth, and the growth of households in Metro City. The data used in this study are growth data that occurred from 2014 to 2018. The results of this paper is forecasting the number of customers, load energy consumption (MWh), total energy requirements (MWh), connected power (kVA), and peak load (MW). Energy consumption growth every year has the same tendency as in previous years. In the household sector, energy consumption will grow higher each year than other sectors. In 2029, it estimated that the peak load that will occur at Metro substations, PT PLN (Persero) Rayon Metro City is 92.62 MW. Keywords — Forecasting, Electrical Energy Needs, Combined Method, PT PLN, Metro City I. INTRODUCTION As the population increases and the economy grows, energy needs in the future, especially electricity, continue to increase. Electrical energy is needed for the interests of industry, households and other activities as well as to support increasingly advanced technological developments [1]. Therefore, with the rapid advancement of technology and the economic activities of the people, the demand for electricity in the future will continue to increase. At present, the increasing demand for electricity is not offset by an increase in electricity supply. Community needs for electricity are increasing but the existing power capacity has not changed[3]. This causes rotating blackouts caused by a deficit in electricity, especially during peak loads, where the load of public electricity usage exceeds the available power. Therefore, the development of electricity supply needs to be done in the future such as the development of power plants, transmission and distribution systems and their control and protection systems[2]. Development of electric power generation, transmission and distribution requires high investment costs. If the development or increase the amount of power generation in not appropriate or too high will cause the waste of the investment cost and power[4]. On the other hand, if the power generation in the power plant is too small from the demand and electricity needs, it will cause a loss on the side of the consumer related to the continuity of disrupted power distribution. To get the optimization of budgetary investment in the development centers of generation, transmission and distribution, the company needs to know the approximate number of load in the future [11]. With study on forecasting this load, a company budget can be prepared for the expansion of power line distribution and an increase in the number of power generation optimally along with the accuracy of the investment budget in accordance with the demand for the electricity needs of the community in the future[12]. The electricity demand increasing in the future must be met to support the progress of the economy and other activities.