A. Rong and P. B. Luh and R. Lahdelma
Dynamic Programming Based Algorithm for the Unit Commitment of the TransmissionConstrained MultiSite Combined Heat and Power System
1054 - 1061
2016
10
8
International Journal of Computer and Systems Engineering
https://publications.waset.org/pdf/10005125
https://publications.waset.org/vol/116
World Academy of Science, Engineering and Technology
High penetration of intermittent renewable energy sources (RES) such as solar power and wind power into the energy system has caused temporal and spatial imbalance between electric power supply and demand for some countries and regions. This brings about the critical need for coordinating power production and power exchange for different regions. As compared with the poweronly systems, the combined heat and power (CHP) systems can provide additional flexibility of utilizing RES by exploiting the interdependence of power and heat production in the CHP plant. In the CHP system, power production can be influenced by adjusting heat production level and electric power can be used to satisfy heat demand by electric boiler or heat pump in conjunction with heat storage, which is much cheaper than electric storage. This paper addresses multisite CHP systems without considering RES, which lay foundation for handling penetration of RES. The problem under study is the unit commitment (UC) of the transmissionconstrained multisite CHP systems. We solve the problem by combining linear relaxation of ONOFF states and sequential dynamic programming (DP) techniques, where relaxed states are used to reduce the dimension of the UC problem and DP for improving the solution quality. Numerical results for daily scheduling with realistic models and data show that DPbased algorithm is from a few to a few hundred times faster than CPLEX (standard commercial optimization software) with good solution accuracy (less than 1 relative gap from the optimal solution on the average).
Open Science Index 116, 2016