18 not proportional in distribution, where on Java Bali region got sufficient supply
whereas almost region outside Java Bali got shortage.
Fig. 2.2. The Growth Capacity in an Installed Generating MW Source : DG of Electricity
2.3 The Transmission Condition of Electrical Power
Mostly transmission net is belonged to and operated by PT. PLN Persero, except on several regions such as on Pulau Batam owned and
operated by PT PLN Batam as a subsidiary of PT PLN Persero, some on Pulau Sulawesi owned and by private but operated by PT PLN Persero and
on Pulau Papua owned and operated by private for individual. Today, the electricity system in a properly integrated found only on Java-
Bali, where the system in electricity of Java-Bali used 3 types of voltage for inter-connection namely on Saluran Udara Tegangan Ekstra Tinggi SUTET
– an Extra high voltage air net in 500 kV as a back bone and with a Saluran
19 Udara Tegangan Tinggi SUTT-Highly Voltage Air Net in 150 kV and 70 kV as
transmission to loan central. Total length of transmission net in electrical power got increasing about
19.28 for the last 5 years period 2012-2016. The growth net length of transmission is as the following :
Fig. 2.3. The growth net length of Transmission kms Source : DG of Electricity
2.4 Electrification Ratio
Due to not all regions in Indonesia got electricity net yet seemly a potency on electricity. The ratio of electricity up to 2016 was about 91.16. If
compared to Singapore, it got 100 already, Brunei Darussalam 99.7, Malaysia 99.0, Thailand in 99.3 and Vietnam got 98.0.
20
Fig. 2.4. The Growth in Realization and Ratio Electricity Plans Source : DG of Electricity
2.5 The Condition in Supply of Electrical Power
Beside condition in ratio of electrification not achieved 100, the supply condition of electrical power on National electricity system also reflect existing
still unbalanced between Supply and demand, with the condition hopeful offer opportunities to investor in taking part on business of supply electricity.
21
Fig. 2.5. A Condition of System in National Electricity Source : DG of Electricity
2.6 Existing Sources of Primary Energy
