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This paper presents model predictive control method for load shedding based on trajectory sensitivities. According to the basic principle of model predictive control, aiming at minimizing the quadric performance index which comprehensively considers both the control cost and the deviation between bus voltage predictive trajectories and their reference values, the receding optimization model is described...
In the condition of suddenly increasing load such as summer peak load, contingencies and so on, it is important to ensure voltage stability margin (VSM) for preventing voltage instability as well as voltage collapse. To support active power on the system, some facilities for weak buses, such as ULTC, SC, FACTS (flexible AC transmission system), are controlled and the dispatch of committing generator...
Based on differential geometric control theory, this work proposes a novel zero dynamics design method for a class of nonlinear non-minimum phase systems, which using dynamic feedback to the controlled system to obtain stable zero dynamics through dimension extension. Nonlinear control law is then derived by means of the linear control design method. Furthermore, both the optimality of the control...
The precision of the voltage phase angle measured by the PMU (Phasor Measurement Unit) can well meet the need of power system analysis and control. A new controller is proposed for power system stability, which can linearize its nonlinear state equations by online tracking of the state variable with the help of PMU, and complete an objective control strategy that forces the system state into a desired...
Voltage instability impacts power system transfer limits and its reliability. This paper presents an approach to determine a voltage control scheme based on the model predictive control (MPC) theory. MPC is used to develop an optimal control strategy, consisting of a sequence of amounts of the shunt capacitors to switch. The resulting control strategy prevents voltage instability and maintains a desired...
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