Voltage sags cost estimation for malaysian industries

In this paper, a project initiated by the Energy Commission of Malaysia has been carried out to find the level of power quality in Malaysia as well as to estimate the cost associated with power quality. Normally, industry has a production target to be achieved yearly. To maintain the quality of production, several factors must be taken into account, such as labor quality, working environment and facilities. However, the quality of power supply is the most significant factor to ensure the continuous production. Nowadays, the power quality problems are increasing dramatically with the increasing use of non-linear load. Studies from other countries have shown that this problem can cause substantial issues. The impact of power quality problems, especially voltage sag on several industries in Malaysia and the costs incurred are discussed in this paper. The estimation of cost is calculated for a voltage sag events that has been captured from the optimum monitor locations. The estimation is made based on the size of the affected area and the number of large power consumer in that affected area.