A routing optimization model for EMS of power systems considering cyber-physical interdependence

Author(s):  
Luo Xu ◽  
Qinglai Guo ◽  
Hongbin Sun ◽  
Zhuo Su
2020 ◽  
Vol 191 ◽  
pp. 02002
Author(s):  
Qingguang Yu ◽  
Zhicheng Jiang ◽  
Yuming Liu ◽  
Gaoxiang Long

This paper proposes a structural optimization model for the offshore oilfield interconnected power system. The model focuses on evaluating the reliability of the system. It is found that the N−1 fault is the primary fault mode leading to severe power loss due to the probability of fault occurrence and the fault consequence according to the statistics of the historical fault information of the offshore oilfield power system. Considering the characteristics of the offshore oil extraction process, the priority of load removal in different processes under different fault conditions is different. Comprehensively considering the above factors, the model uses the minimum load shedding model that considers the load priority level in the objective function to calculate the power outage losses in all N−1 fault states of the system. The test results of numerical examples prove that the optimized solution of the structural optimization model can achieve a better balance between economy and reliability.


2014 ◽  
Vol 556-562 ◽  
pp. 5328-5332
Author(s):  
Lin Zhu ◽  
Xiao Dun ◽  
Can Shi Zhu

Affected with various factors in wartime, the time during which the transport vehicles of military supplies pass through a certain section of a route is an uncertain parameter, whose optimization objective functions and constraints cannot be defined and solved through the traditional method of deterministic planning. In response to the problem, a routing optimization model is put forward herein for the timing uncertainty of wartime transportation and a method is devised for the Improved Genetic Algorithm to solve the routing optimization model with respect to timing uncertainty. Examples are also cited to verify the rationality of the algorithm as well as the correctness of the model.


2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Liyi Zhang ◽  
Ying Wang ◽  
Teng Fei ◽  
Hongwei Ren

As the energy conservation and emission reduction and sustainable development have become the hot topics in the world, low carbon issues catch more and more attention. Logistics, which is one of the important economic activities, plays a crucial role in the low carbon development. Logistics leads to some significant issues about consuming energy and carbon emissions. Therefore, reducing energy consumption and carbon emissions has become the inevitable trend for logistics industry. Low carbon logistics is introduced in these situations. In this paper, from the microcosmic aspects, we will bring the low carbon idea in the path optimization issues and change the amount of carbon emissions into carbon emissions cost to establish the path optimization model based on the optimization objectives of the lowest cost of carbon emissions. According to different levels of air pollution, we will establish the double objectives path optimization model with the consideration of carbon emissions cost and economy cost. Use DNA-ant colony algorithm to optimize and simulate the model. The simulation indicates that DNA-ant colony algorithm could find a more reasonable solution for low carbon logistics path optimization problems.


2020 ◽  
Author(s):  
Jose Miguel García-Guzman ◽  
Néstor González-Cabrera ◽  
Luis Alberto Contreras-Aguilar ◽  
Jose Merced Lozano-García ◽  
Alejandro Pizano-Martinez

This book chapter presents a flexible approach to incorporate mathematical models of FACTS devices into the Power Flow (PF) and the Optimal Power Flow (OPF) analysis tools, as well as into the standard OPF Market-Clearing (OPF-MC) procedure. The proposed approach uses the Matlab Optimization Toolbox because it allows to easily: (a) implement a given optimization model, (b) include different objective functions using distinct equality and inequality constraints and (c) modify and reuse an optimization model that has been previously implemented. The conventional OPF model is the main core of the proposed approach, which is easily implemented and adapted to include the mathematical models of FACTS devices. The resulting implementation of the OPF model featuring FACTS devices can be easily modified and adjusted to obtain the implementation of both the PF and the OPF-MC models which includes such devices. It should be mentioned that with the flexible approach proposed here, the complexity as well as the implementation time of optimized models featuring embedded FACTS devices is significantly reduced, since it is not necessary to define the expressions associated with the hessian matrix and the gradient vector. The flexibility and reliability of the proposed approach are demonstrated by means of several study cases using test as well as real power systems.


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