An OPF based tool for demand relief programs

Abstract

Abstrucf-Tbis paper proposes a Dynamic Opthal PowerFlow @OPQ framework to assist the implementation of consumer participation programs aimed at mitigating the effects of critical operating conditions on the quality of power supply. The proposed DOPF-based tool allows the representation of consumer operating constraints and provides important subsidies to the implementation of consumer participation programs, such as the proper selection of the loads to be reduced and the corresponding reduction of MW/MVAr consumption required to alleviate the abovementioned effects. The explicit representation of transmission losses and reactive power flows into the problem formulation enhances the ability of the DOPF tool to devise adequate demand participation strategies. The application of the proposed method to implement demand participation programs is illustrated through its application to two test systems, including a realistic system based on the power network of a Southern Brazil power utility. Index Ternas4onsumer participation; Priceresponsive loads; Price4asticity of demand; Dynamic optimal power now.Thk work is supported by the R&D Program of Centrais E16tricas de ). S. S.Pacheco is with Cenirais Elktricas de Santa Catarina S. A., Rodovia sc 404, km 03, 88034-001 Florian6potis, SC, Brazil (e-mail: sergiosp@celesc.combr). VIII. BIOGRAPHIES Antonio Simles Costa (SM' 2002) received his degree in Electrical Engineering h o m Federal University of Pad, Brazil, in 1973, and the M.Sc. and Ph.D. degrees !?om Federal University of Sauta Catarina, Brazil, in 1975, and University of Waterloo, Canada, in 1981, respectively, Since 1975 he is with Federal University of Santa Catarina, Brazil, where he is currently a Professor. His research interest are concerned with computer methods for power systems operation and control. Wadaed Uturbey received her degree in Electrical Engineering from Universidad de la RepGblica, Uruguay, in 1991, and the M . S . and Dr. Eng. degree bom Federal University of Santa Cat", Brazil, in 1995 and 2002, respectively. She has been a researcher at the Power System Group of the Federal iJn;verSity of Santa Catarina, Brazil until July 2004, and is currently with the Federal University of Minas Gerais, Brazil. Her research interests include methods for power systems operation and optimization. Sandra Nakrnlshi received her degree in Electrical Engineering from Federal University of Santa Catarina, Brazil, in 2W4. She is currently working towards her Master's degree at the same University. Her research interests are concerned w i t h Optimal Power Flow applications to assist consumer participation program. Alexandre De Marco received his degree in Electrical Engineering from Federal University of Santa Catarina, Brazil, in 2001, and the M,Sc. degrees at the same University, in 2004. SSrglo dos Santos Pacheco received his degree in Electrical Engineering h m Federal University of Santa Camha, Bmzil, in 1983. He has been with Centrais Eldtricas de Santa Catarina -CELESC €or over 20 years. His professional act...

Solving long time‐horizon dynamic optimal power flow of large‐scale power grids with direct solution method

“…Equation (13) represents the dynamic constraints. When (8) and (9) are both included in dynamic constraints, the size of dynamic constraints is…”

“…For large-scale DOPF models, one major concern is to reduce the dimension of KKT system. Furthermore, observation of DOPF model (1)- (9) shows that the inequality constraints have both lower and upper bounds. Hence, the dual-bound PDIPM framework proposed in [25] is adopted to solve the large-scale DOPF models.…”

“…The optimal dispatch of P-3743 system over 24 time intervals is implemented including (8) and (9). This test system includes 379 dispatchable generators, 5020 branches and 855 loads (totally 69 GW).…”

“…When the power flow equations are included, the DED evolves into DOPF problem, which is developed for optimisation in a given time-horizon subject to power flow constraints, operational constraints and dynamic constraints. DOPF is critical for applications such as optimal generations dispatch [8][9][10], ancillary service dispatch [11], load management [12,13], and so on. Various models have been established with different generation characteristics.…”

Optimal generation scheduling with demand side participation

“…The influence of DSB on total costs, system marginal price, capacity element payments and benefit allocation between producers and consumers are examined. A tool based on OPF assessing the effects of consumer participation in power market is developed in[83].Two scenarios, price-responsive loads and consumers subject to constant tariffs, are compared to illustrate the effectiveness of consumers' participation programs. It is concluded that consumers' reduction of their energy consumption relieves critical system operating conditions, especially during critical operating conditions.…”