US 7,321,810 B2 | ||
Method of dynamic economic dispatch | ||
Ashmin Mansingh, Brooklyn Park, Minn. (US); Haso Peljto, Brooklyn Park, Minn. (US); Mike York, Brooklyn Park, Minn. (US); and Dingguo Chen, Eden Prairie, Minn. (US) | ||
Assigned to Siemens Power Transmission & Distribution, Inc., Wendell, N.C. (US) | ||
Filed on May 07, 2004, as Appl. No. 10/841,722. | ||
Claims priority of provisional application 60/470096, filed on May 13, 2003. | ||
Claims priority of provisional application 60/470095, filed on May 13, 2003. | ||
Claims priority of provisional application 60/470039, filed on May 13, 2003. | ||
Claims priority of provisional application 60/470038, filed on May 13, 2003. | ||
Prior Publication US 2004/0257059 A1, Dec. 23, 2004 | ||
Int. Cl. G05D 3/12 (2006.01); G01R 19/00 (2006.01); G01D 1/14 (2006.01); G06F 17/50 (2006.01); G05D 5/00 (2006.01); G05D 9/00 (2006.01) |
U.S. Cl. 700—286 [324/76.11; 324/76.13; 703/1; 703/2; 703/7; 703/12] | 28 Claims |
1. A method, comprising:
for an electrical power system comprising a plurality of committed electrical power generating units:
for each of the committed electrical power generating units, determining an optimal power output temporal trajectory, the
optimal power output temporal trajectory constrained by a ramping limit of the committed electrical power generating unit,
wherein determining the optimal power output temporal trajectory for each of the committed electrical power generating units
comprises calculating ramping constraints according to a Lagrange relationship:
![]() wherein ρunitt;Up is a multiplier for an upward ramping limit of a unit over a time interval t; ρunitt;Dn is a multiplier for a downward ramping limit of a unit over the time interval t; ΔPunitDn is a unit downward ramping limit; ΔPunitUp is a unit upward ramping limit; Punitt is the unit power generation at time interval t; T is a time period comprising consecutive time intervals t; Punitt−1 for t=t1 represents Punit0 with t0 being a current time interval; Cunit is the cost of unit power generation; and ℑSCEDt represents static security constrained economic dispatch (SCED) constraints at time interval t;
determining an optimal power reserve temporal trajectory for each of the committed electrical power generating units; and
assigning each of the optimal power output temporal trajectories to the respective electrical power generating units so that,
over a predetermined consecutive set of time intervals, an integrated cost of system power output is minimized and a system
reserve requirement is met.
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