Electricity in the present is a primary need for the people of Indonesia. Therefore,
the quality of good electrical energy must be fulfilled so that consumer needs are
met. Variable load changes have an impact on system stability. If the mechanical
power on the initial drive shaft does not immediately adjust to the amount of
electrical power in the electric load, then the frequency and voltage will shift from
the normal position, so that the load is released to anticipate this. In this study, the
method of calculation analysis and simulation of the release of loading in the
substation using software ETAP 12.6 to determine how long the transients that arise
due to the release of the burden and cost of losses experienced by PLN due to
interference with the feeder Kalibakal. Based on these results, the transient
recovery voltage is obtained about 3 seconds after the release of one of the
Kalibakal Substation power grids, then about 0.20 seconds during load release in
feeders 11 and 14. Losses suffered by the PLN due to disturbances that cause load
release during the month January to September 2018 in Kalibakal feeders around
Rp.2.654,504,265.9