DYNAMIC LOAD FLOW OF CIGRE MV/LV DISTRIBUTION BENCHMARK MODEL

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.