Abstract:
Variations in load and renewable DGs brings overall fluctuations in distribution system as a
result stability of system disturbs in the form of system losses enrichment and reduction in bus
voltage profiles. The system stability can be strengthen by allocating DGs having suitable size in
the system but in a literature the DGs are allocated at fixed loads and constant output power from
generators while in practical these values change with time during a whole day. Robust solution
is calculated for a whole day on the basis of min-max regret concept by making different
scenarios while the test system in current paper is “CIGRE MV bench mark model” carrying
variable residential and commercial loads at different buses with addition of different DGs
having variant output powers at different time instants. Variation in load and renewable power
are considered in the form of different scenarios, so as 24 scenarios are considered while each
scenario represents specific hour of the day. Optimum size and location of DGs are obtained for
each scenario on the basis of minimum value of Multi-Objective-Index (MO) using by newly
formed algorithm BRO. The robust solution of DGs are obtained among all scenarios to
minimize active power losses, reactive power losses and voltage deviation index as a combine
MO for a whole day. The results are also taken with GA and APSO algorithms while the results
show that remarkable reduction arises in system losses and improvement in bus voltages at each
time instant of day. The test system is 14 bus system.
