BATTERY STATE OF VOLTAGE MODELING AND AN ALGORITHM DESCRIBING DYNAMICCONDITIONS FOR LONG-TERM STORAGE SIMULATION IN A RENEWABLE SYSTEM

The behaviour of lead-acid batteries during dynamic operation on a lon g-period basis is analyzed in this paper. An algorithm which takes int o account all possible battery conditions during real operation has be en developed and is used for the battery state of voltage, SOV, predic tions. This battery algorithm is general and therefore can be used for other types of accumulators, provided that the model parameters are k nown. For model validation, a typical battery was incorporated for ene rgy storage in a stand-alone, renewable power supply system and the ex perimental results were compared with the algorithm predictions. The r esults show that very good agreement between measured and simulated ba ttery SOVs has been achieved for monthly periods of continuous system operation.