Optimization on Load Compensation of Generators Excitation Systems Considering Voltage Stability Margin

To attain the optimal load compensations for excitation systems, this paper proposes an optimization model considering voltage stability margin constraints. The proposed model establishes a 1-norm objective function for minimizing the correction of the reference voltage. The relationship between reactive output power, voltage, and load compensation is analytically expressed based on the characteristic simulation that generator fails to maintain reference voltage under the limitation of reactive power capability. Since it is a typical non-linear programming model, the proposed model is solved successfully by the interior point method. Simulations on the WSCC 3-machine 9-bus system, IEEE 10-machine 39-bus system, and two large systems show the proposed model with the careful consideration for the practical requirement of voltage stability and damping control have high computing efficiency and application prospect.