Abstract
When the power grid is disturbed to a certain degree, it may be extremely deteriorated. At this time, corresponding control measures need to be taken to eliminate or reduce the risks. For an unsafe normal state, the system can be restored to a safe state through preventive control. This paper proposes a risk-based power grid operational control strategy by using the optimal power flow method to solve the problem of power grid operational control based on risk parameters with the goal of minimizing the power grid operating risks. Under the condition of satisfying steady-state operational constraints, by adjusting the control measures that can be used in the system, such as active power generation, the safe operational state of the system with the least operational risk is realized. To avoid the poor effectiveness of alternating current power flow of large power grid, linearized power flow model is employed. Simulation results using an IEEE 118-node system and East China Power Grid system. The proposed operational control strategy can achieve the effect of eliminating or reducing operating risks, which provide effective decision-making for the dispatch operators to deal with risks.
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