Self Evaluation questions ELECTRICAL Department, RESTRUCTURED POWR SYSTEM by A R ABHYANKAR, IIT Delhi, New Delhi. Module 5 1.The numerical value of LMP on all buses is exactly the same. Which of the following inferences are true? a)The system has less losses b) The DC OPF has been carried out c)The AC OPF has been carried out d) All line flows are within limits e) The value of all Lagrangian multipliers associated with inequalities of line limits are zero f) The least cost dispatch satisfying the given constraints has been obtained 2.LMP on all buses has same numerical value. The line shadow price for line m-n will be: 3. For a hypothetical loss-less system, merchandizing surplus will be a) greater than zero b) less than zero c) zero d) can't say 4.Locational Marginal Price (LMP) on a bus a) Can be lesser than the price of the cheapest generator b)  Will always be greater than or equal to price of the cheapest generator c)  Can be negative sometimes 5. For a standard two bus lossless system, the power flow is from bus 1 to bus 2 and Lagrange multiplier associated with the global load-generation balance equation (λ) is equal to 10. The Lagrange multiplier associated with inequality constraint of line flow limit is μ12=0. The LMP on bus 2 is a)10 b) 5 c) 15 d) Data insufficient or something wrong with the data e)  None of the above