A Multiobjective Evolutionary Approach for Solving the Multi-Area Dynamic Economic Emission Dispatch Problem Considering Reliability Concerns

Abstract

Economic dispatch (ED) problems, especially in multi-area power networks, have been challenging concerns for power system operators for several decades. In this paper, we introduce a novel approach for solving the multiobjective multi-area dynamic ED (MADED) problem in the presence of practical constraints such as valve-point effect (VPE), prohibited operating zone (POZ), multi-fuel operation (MFO), and ramp rate (RR) limitations. Different objective functions including energy not supplied (ENS), generation costs, and emissions are investigated. The reliability objective, which has been less studied in economic dispatch area, distinguishes the proposed study from other studies. A compromise has been made from economic and reliability points of view. The MADED problem in the power system is inherently a complex and nonlinear problem, considering the operational constraint increments and the intricacy of the problem. Hence, the modified grasshopper optimization (MGO) algorithm based on a chaos mechanism is presented to prevent being trapped in local optima. The proposed method is tested on two systems including a 10 unit, 3-zone test system and a 40-unit 3-zone test system, and then, the outcomes are compared with those of other evolutionary techniques such as gray wolf optimization (GWO) and modified honey bee mating optimization (MHBMO). The simulation results demonstrate that the suggested strategy is successful in resolving both single-objective and multiobjective MADED problems.

Presenting a Novel Evolutionary Method for Reserve Constrained Multi-Area Economic/Emission Dispatch Problem

“…Another feature of these studies [17][18][19][20][21][22][23][24] is similar to previous studies [9][10][11][12][13][14][15][16], providing new exploratory algorithms based on strategies to balance local and global search. However, the spinning reserve constraints in these studies [17][18][19][20][21][22][23][24] is not considered similar to other previous studies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Usually, due to this condition, power plants can sell their reservation power in the reservation market in a few hours, similar to the electricity market.…”

“…At the same time, they have achieved good results in solving the MAED problem. However, the pollution objective function is not included in these studies, and the problem is solved as a single objective with the fuel cost function of the power plants [1,3]. On the other hand, not paying attention to the issue of pollution causes irreparable damage to the environment and living beings.…”

“…Considering the operational limitations of power systems, the optimal combination of generation of power plant units in the most economical form can be provided through an ED model [1,2]. Some studies in the field of ED have also paid attention to environmental issues in addition to economic issues and have used combined heat and power units in the power system [2,3].…”

“…The power system typically consists of several interconnected areas. As a result, economic dispatch is expanded upon using multi-area economic dispatch (MAED) [3]. The generators in MAED are divided into various power generation zones, which are linked…”