Title :
A practical minimum load shedding strategy to mitigate voltage collapse
Author :
Feng, Zhihong ; Ajjarapu, Venkataramana ; Maratukulam, Dominic J.
Author_Institution :
Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA
fDate :
11/1/1998 12:00:00 AM
Abstract :
This paper presents a new approach for determining the minimum load shedding to restore the solvability of a power system described by differential-algebraic equations. Through parameterization of a given control strategy (i.e. control direction in parameter space), the continuation method is applied to find the equilibrium point associated with the system post-contingency boundary. Then, the invariant subspace parametric sensitivity (ISPS) is used to determine the most effective control strategy so that a practical minimum load shedding can be derived. The system adjustments that could further reduce the minimum load shedding, such as rescheduling of real power generations and changing of generator terminal voltages are also investigated The approach is illustrated with the New-England 39-bus system and the reduced Iowa 162-bus system
Keywords :
control system analysis computing; control system synthesis; differential equations; load shedding; optimal control; power system analysis computing; power system control; power system stability; sensitivity analysis; voltage control; computer simulation; continuation method; control design; control simulation; control strategy parameterisation; differential-algebraic equations; equilibrium point; generator terminal voltage changes; invariant subspace parametric sensitivity; minimum load shedding strategy; post-contingency boundary; power systems; real power generation rescheduling; voltage collapse mitigation; Control systems; Economic forecasting; Power engineering; Power engineering computing; Power generation economics; Power system economics; Power system restoration; Power systems; Printing; Voltage control;
Journal_Title :
Power Systems, IEEE Transactions on
