scholarly journals Co-Optimized Analysis and Design of Electric and Natural Gas Infrastructures

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 2012 ◽  
Author(s):  
Santiago Lemos-Cano ◽  
James McCalley
Keyword(s):  
Natural Gas ◽  
Transmission Lines ◽  
Power Flow ◽  
Planning Process ◽  
The United States ◽  
Integrated System ◽  
Mixed Integer ◽  
Eastern Region ◽  
Analysis And Design ◽  
Expansion Planning

This paper proposes and implements a long-term deterministic capacity expansion model for the co-optimization of electric and natural gas infrastructures. It determines the required investments in generation units, transmission lines and pipelines for meeting future demands, while representing electricity and natural gas flows using DC Power Flow and Weymouth equations, respectively. A Mixed Integer Nonlinear Programming (MINLP) problem is developed, from which a linearized version is derived. A 26 node integrated gas-electric system for the Eastern Region of the United States is used to demonstrate the model’s capabilities. Results show that the model provides an accurate operational representation of the integrated system, and, therefore, enhances the expansion planning process.

scholarly journals Transmission Network Expansion Planning Considering Phase-Shifter Transformers

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Celso T. Miasaki ◽  
Edgar M. C. Franco ◽  
Ruben A. Romero
Keyword(s):  
Mathematical Model ◽  
Transmission Lines ◽  
Phase Shifter ◽  
Planning Process ◽  
Main Idea ◽  
Mixed Integer ◽  
Planning Problem ◽  
Transmission Network ◽  
Network Expansion ◽  
Expansion Planning

This paper presents a novel mathematical model for the transmission network expansion planning problem. Main idea is to consider phase-shifter (PS) transformers as a new element of the transmission system expansion together with other traditional components such as transmission lines and conventional transformers. In this way, PS are added in order to redistribute active power flows in the system and, consequently, to diminish the total investment costs due to new transmission lines. Proposed mathematical model presents the structure of a mixed-integer nonlinear programming (MINLP) problem and is based on the standard DC model. In this paper, there is also applied a specialized genetic algorithm aimed at optimizing the allocation of candidate components in the network. Results obtained from computational simulations carried out with IEEE-24 bus system show an outstanding performance of the proposed methodology and model, indicating the technical viability of using these nonconventional devices during the planning process.

scholarly journals A Day-Ahead Scheduling Model of Electricity-Gas Integrated System with Power-to-Gas

2021 ◽  
Vol 2121 (1) ◽  
pp. 012003
Author(s):  
Jiacheng Ruan ◽  
Yongji Cao
Keyword(s):  
Natural Gas ◽  
Power System ◽  
Integrated System ◽  
Collaborative Optimization ◽  
Energy Utilization ◽  
Mixed Integer ◽  
Scheduling Model ◽  
Gas System ◽  
Power To Gas ◽  
Natural Gas System

Abstract In recent years, with the increasing of gas-fired power plants and the development of power-to-gas (P2G) technology, and the interdependence between the power system and the natural gas system has gradually deepened. This paper proposes a day-ahead optimal scheduling model for an electricity-gas integrated system. Based on P2G, it can realize the two-way movement of energy between the power system and the natural gas system, promote the coordinated and optimized operation of the two energy systems, and improve energy utilization. The model proposed in this paper minimizes the total cost of both systems. Firstly, the power system sub-model and the natural gas system sub-model in the collaborative optimization model are studied separately, and the constraints between the two systems are considered. Then, the piecewise linearization method and DC power flow simplification method are adopted, the nonlinear problem is transformed into a mixed integer linear programming problem. Finally, the load forecast value of the day-ahead dispatch is loaded, and the 24-hour dispatch result is obtained through the simulation platform, and the P2G is used for joint dispatch.

scholarly journals An Extreme Scenario Method for Robust Transmission Expansion Planning with Wind Power Uncertainty

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2116 ◽  
Author(s):  
Zipeng Liang ◽  
Haoyong Chen ◽  
Xiaojuan Wang ◽  
Idris Ibn Idris ◽  
Bifei Tan ◽  
...  
Keyword(s):  
Wind Power ◽  
Transmission Lines ◽  
Benders Decomposition ◽  
Electrical Power ◽  
Mixed Integer ◽  
Two Stage ◽  
Operating Variables ◽  
Expansion Planning ◽  
Power Resources ◽  
Bus System

The rapid incorporation of wind power resources in electrical power networks has significantly increased the volatility of transmission systems due to the inherent uncertainty associated with wind power. This paper addresses this issue by proposing a transmission network expansion planning (TEP) model that integrates wind power resources, and that seeks to minimize the sum of investment costs and operation costs while accounting for the costs associated with the pollution emissions of generator infrastructure. Auxiliary relaxation variables are introduced to transform the established model into a mixed integer linear programming problem. Furthermore, the novel concept of extreme wind power scenarios is defined, theoretically justified, and then employed to establish a two-stage robust TEP method. The decision-making variables of prospective transmission lines are determined in the first stage, so as to ensure that the operating variables in the second stage can adapt to wind power fluctuations. A Benders’ decomposition algorithm is developed to solve the proposed two-stage model. Finally, extensive numerical studies are conducted with Garver’s 6-bus system, a modified IEEE RTS79 system and IEEE 118-bus system, and the computational results demonstrate the effectiveness and practicability of the proposed method.

Optimal capacity utilisation of transmission lines network in power flow operations: a survey

2019 ◽  
Vol 17 (5) ◽  
pp. 1056-1076
Author(s):  
Daniel Esene Okojie ◽  
Adisa Abdul-Ganiyu Jimoh ◽  
Yskandar Hamam ◽  
Adebayo Ademola Yusuff
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Power Flow ◽  
Network Capacity ◽  
Mixed Integer ◽  
Reserve Capacity ◽  
Capacity Utilisation ◽  
Content Type ◽  
Optimal Capacity ◽  
Line Switching

Purpose This paper aims to survey the need for full capacity utilisation of transmission lines in power systems network operations. It proposes a review of the N-1 security criterion that does not ensure reliable dispatch of optimum power flow during outage contingency. The survey aims to enlarge the network capacity utilisation to rely on the entire transmission lines network operation. Design/methodology/approach The paper suggests transmission line switching (TLS) approach as a viable corrective mechanism for power dispatch. The TLS process is incorporated into a constraint programming language extension optimisation solver that selects the switchable line candidates as integer variables in the mixed integer programming problem. Findings The paper provides a practical awareness of reserve capacity in the lines that provide network security in outage contingency. At optimum power flow dispatch, the TLS is extended to optimal transmission line switching (OTLS) that indicates optimal capacity utilisation (OCU) of the available reserve capacity (ARC) in the network lines. Practical implications Computational efficiency influenced the extension of the OTLS to optimal transmission switching of power flow (OTSPF). The application of OTSPF helps reduce the use of flexible AC transmission systems (FACTS) and construction of new transmission lines.. Originality/value The paper surveys TLS efforts in network capacity utilisation. The suggested ARC fulfils the need for an index with which the dispatchable lines may be identified for the optimal capacity utilisation of transmission lines network.

scholarly journals A Long-Term Evaluation on Transmission Line Expansion Planning with Multistage Stochastic Programming

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1899 ◽  
Author(s):  
Sini Han ◽  
Hyeon-Jin Kim ◽  
Duehee Lee
Keyword(s):  
Stochastic Programming ◽  
Transmission Line ◽  
Transmission Lines ◽  
Mixed Integer ◽  
Planning Problem ◽  
Multistage Stochastic Programming ◽  
Dual Decomposition ◽  
Expansion Planning ◽  
Integer Variables ◽  
Progressive Hedging

The purpose of this paper is to apply multistage stochastic programming to the transmission line expansion planning problem, especially when uncertain demand scenarios exist. Since the problem of transmission line expansion planning requires an intensive computational load, dual decomposition is used to decompose the problem into smaller problems. Following this, progressive hedging and proximal bundle methods are used to restore the decomposed solutions to the original problems. Mixed-integer linear programming is involved in the problem to decide where new transmission lines should be constructed or reinforced. However, integer variables in multistage stochastic programming (MSSP) are intractable since integer variables are not restored. Therefore, the branch-and-bound algorithm is applied to multistage stochastic programming methods to force convergence of integer variables.In addition, this paper suggests combining progressive hedging and dual decomposition in stochastic integer programming by sharing penalty parameters. The simulation results tested on the IEEE 30-bus system verify that our combined model sped up the computation and achieved higher accuracy by achieving the minimised cost.

Analysis and Design controlling parameters of UPFC System for Power Flow Management

2013 ◽  
Vol 1 (1) ◽  
pp. 24-29
Author(s):  
Subhash S ◽  
◽  
Subash Chandra Bose M ◽  
Sudhiendhar P.R ◽  
Sankar S ◽  
...  
Keyword(s):  
Power Flow ◽  
Flow Management ◽  
Analysis And Design

Concept and principles of building an integrated system of management of activities of regional gas supply system entities Kaliningrad region

2019 ◽  
pp. 64-72
Author(s):  
G.G. Arunyants
Keyword(s):  
Control System ◽  
Natural Gas ◽  
Supply System ◽  
Integrated System ◽  
Software Complex ◽  
Geographically Distributed ◽  
Basic Solutions ◽  
Kaliningrad Region ◽  
And Control ◽  
Gas Supply

The results of analysis of problems of regulation of gas supply complex of Kaliningrad region and main ways to increase its efficiency, as well as basic solutions for creation of a software complex Т-GAZ-2 automated calculation of natural gas tariffs for ACS of gas supply system subjects, geographically distributed and information connected to the regional automated information and control system (RAIS).

European experience of forming strategic directions of socio-economic development of the country

2019 ◽  
pp. 3-6
Author(s):  
Vasyl Papp ◽  
Nelya Boshota
Keyword(s):  
Economic Development ◽  
Strategic Planning ◽  
Development Strategy ◽  
Planning Process ◽  
Development Planning ◽  
Integrated System ◽  
Main Task ◽  
European Experience ◽  
Social And Economic Development ◽  
Socio Economic Development

The main task that determines the effective functioning of the country is the formation of a strategy for its socio-economic development based on a long-term innovation strategy. An innovative development strategy of the country is defined as a fundamental, basic element of the overall strategy of socio-economic development. The purpose of the article is to develop the conceptual foundations for shaping the country's socio-economic development strategy in modern conditions, adjusting the priority directions of the strategy and the peculiarities in using the means of achieving the goals, taking into account European experience. The article examines the European practice of developing and implementing the strategy of socio-economic development of the country as the most important instrument of the state's influence on social and economic development. Recommendations on the use of advanced strategic planning tools are developed. It is proved that without the scientific and methodological support of the plan of socio-economic development of the country it is impossible to count on the successful solution of important tasks and the democratization of public relations. The concept of strategy formation is designed to take into account the interests of economic entities and territory and to cover not only the traditionally used sectoral aspect of development, but also the territorial, which includes the creation and development of clusters and special economic zones. European experience shows that transition of a country to an innovative socially oriented type of development requires an increase in the efficiency of the state strategic planning process, the achievement of which is possible only with the co-ordinated activity of state authorities, business structures, science and society. It should be emphasized that in the prevailing conditions there is a need to form a single integrated system of social and economic development planning that optimally combines both the use of strategic planning and the program-target method for solving urgent problems.

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