Patent ID: 11862973
Assignee: XIANGTAN UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 6:
7. The optimization method for capacity of a heat pump and power of various sets of energy source equipment in an energy hub according to claim 6, wherein the step (4) specifically comprises that:
(4-1) the binary search algorithm is a computer algorithm with a time complexity of 0(logn); a lower limit and an upper limit of the capacity of the heat pump need to be set according to the idea of the binary search algorithm; it can be known from the formula (27) that the value range of the capacity of the heat pump is [lmid, rmid]=[0, (ηehHP−1)Pe,HP];
(4-2) an ending condition of binary search needs to be set according to the idea of a binary algorithm; according to the idea of the multi-objective algorithm, if the length of the value range of the capacity of the heat pump is less than L, then the binary search is ended to enter step (4-7);
(4-3) according to the analysis of a heat pump efficiency graph, large or small heat pump capacity is not beneficial to the operation of the whole energy hub; the heat pump efficiency graph which is a quadratic function with an upward opening is obtained; so, we need to take three values for comparing each time when binary search is performed, respectively:

mid=(lmid+rmid)/2   (32)

lmid=(lmid+mid)/2   (33)

rmid=(mid+rmid)/2   (34)

(4-4) optimal total annual operation cost lmidCop, midCop, and rmidCop and optimal total annual exhaust emission lmidCo2tot, midCo2tot, and rmidCotot corresponding to the lmid, mid, and rmid are obtained from the lower-layer model, and objective function values, total annual cost Ctot and total annual exhaust emission Co2tot, are calculated using objective function formulae (1) and (3), which are respectively:

tuplelmid=(lmid=(midCtot, lmidCo2tot)   (35)

tuplemid=(midCop, midCo2tot)   (36)

tuplermid=(rmidCop, rmidCo2tot)   (37)

(4-5) if tuplelmid dominates tuplermid, then the heat pump range is updated to be [lmid, mid], and step (4-2) is re-executed; otherwise, step (4-6) is executed;
(4-6) if tuplermid dominates tuplelmid, then the heat pump range is updated to be [mid, rmid], and step (4-2) is re-executed; otherwise, the tuplermid and the tuplelmid do not dominate each other, then step (4-7) is executed; and
(4-7) optimization solutions, tuplelmid, tuplemid, and tuplermid, are obtained; and one of the optimization solutions is selected and output according to preference.