This paper presents a proposed procedure for maximal preventive reactive power control actions using the multi-objective fuzzy linear programming (MFLP) technique to overcome any emergency condition may be occurred. The proposed procedure is very significant to eliminate violation constraints and give an optimal reactive power reserve for multi-operating conditions. The proposed multi-objective functions are: minimizing the real transmission losses, maximizing the reactive power reserve at certain generator, maximizing the reactive power reserve at all generation systems and/or switchable VAR devices. The proposed MFLP is applied to 5-bus test system and the West Delta region system as a part of the Egyptian Unified network. The numerical results show that the proposed MFLP technique achieves a minimum real power loss with maximal reactive reserve for power systems for different operating conditions.