Thursday, February 14, 2013

Load Shedding

Economic growth is proportionally with electric demand. Java Bali grid in 1985 peak load only 2196MW with every delta frequency 200MW/Hz.

Now in the late of 2011, Java Bali grid peak load is more than 19,000MW with the biggest Unit with Boiler Super-critical 800MW in Paiton 3 East Java.

















How much decreasing the frequency system if the biggest load got trip? The value of inertia constant (H) still in asumption 4.375s (the value between 2 – 8s) so that the calculation in the formula still need to review. To get exactly the value of inertia constant, we need to monitor when the Unit Load 800MW trip on grid system peak load on 50Hz.

















































































***
Inertia constant value is 20s if we review to data on 22 December 2011 11:49 660MW lost in Java-Bali grid load 17,507MW.




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  1. This blog will be review due to found actual case on 13 February 2013 10:49 that Java Bali total load was 19,442MW and biggest power plant on Paiton #3 815MW got trip. Tanjung Jati B Unit #2 Load was 450MW Governor mode and got swing to 500MW made turbine control force to manual control.

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