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Optimal Power Scheduling of a GenCo Using Two-Point Estimate Method

  • Kittisak JermsittiparsertEmail author
Chapter
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Abstract

Optimal scheduling of a generating company (GenCo) is necessary in the day-ahead electricity market to obtain maximum profit. But, the market price uncertainty may lead to negative effects for GenCo which should be modeled in the uncertain environment. First, a deterministic-based model via Mixed-Integer Quadratic Constrained Program (MIQCP) is formulated in this study to obtain optimal scheduling of GenCo. Then, a two-point estimate method (TPEM) is proposed to model the market price uncertainty in order to obtain uncertainty-based scheduling of GenCo. The proposed approach is investigated on two GenCo comprising 5-unit and 54-unit thermal generation to show the capabilities of the proposed approach in a large test system. Furthermore, the obtained results based on proposed approach are compared with the Monte Carlo Simulation (MCS) and deterministic approach in order to show the efficiency of the proposed approach in the uncertain environment.

Keywords

Generating company (GenCo) Two-point estimate method (TPEM) Monte Carlo simulation (MCS) Mixed-integer quadratic constrained program (MIQCP) 

Nomenclature

Set

t

Index of time interval

i

Index of generation units

j

Auxiliary index for linear modeling of minimum up-time and minimum down-time constraints

Known Parameters

ai, bi, ci

Quadratic, linear, and fixed coefficients of operation cost function for generation unit

SDi,SUi

Shut-down and start-up costs of generation unit

\( {P}_i^{\mathrm{G},\min } \),\( {P}_i^{\mathrm{G},\max } \)

Minimum and maximum powers of generation unit

URi,DRi

Ramp-up and ramp-down limits of generation unit

MDTi,MUTi

Minimum down/up time limits of generation unit

Dni, j,Upi, j

Auxiliary parameters for the MDT and MUT constraints

\( {\lambda}_t^D \)

Electricity price

Decision Variables

Ui, t

Binary variable {0,1}, It is 1 if generation unit is ON; otherwise, it is 0.

\( {P}_{i,t}^{\mathrm{G}} \)

Generation power of unit

ΔPi, t

An auxiliary variable for using the power generation of unit

SDCi, t,SUCi, t

Shut-down and start-up costs of generation unit

Functions

Cost (t)

Total cost of GenCo at each time

F(PG, λD)

Total profit of GenCo

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Social Research InstituteChulalongkorn UniversityBangkokThailand

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