scholarly journals Optimal Planning of Electricity-Natural Gas Coupling System Considering Power to Gas Facilities

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3400
Author(s):  
Jie Xing ◽  
Peng Wu
Keyword(s):  
Natural Gas ◽  
Energy Systems ◽  
Optimal Planning ◽  
Planning Model ◽  
Operation Costs ◽  
Coupling System ◽  
Gas System ◽  
Different Types ◽  
Power To Gas ◽  
Natural Gas System

Bidirectional coupling systems for electricity and natural gas composed of gas units and power-to-gas (P2G) facilities improve the interactions between different energy systems. In this paper, a combined optimization planning method for an electricity-natural gas coupling system with P2G was studied. Firstly, the characteristics of the component model of the electricity-natural gas coupling system were analyzed. The optimization planning model for the electricity-natural gas coupling system was established with the goal of minimizing the sum of the annual investment costs and the annual operation costs. Based on the established model, the construction statuses for different types of units, power lines, and pipelines and the output distribution values for gas units and P2G stations were optimized. Then, the immune algorithm was proposed to solve the optimization planning model. Finally, an electricity-natural gas coupling system composed of a seven-node natural gas system and a nine-node power system was taken as an example to verify the rationality and effectiveness of the model under different scenarios.

scholarly journals Flexible Dispatch for Integrated Power and Gas Systems Considering Power-to-Gas and Demand Response

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5554
Author(s):  
Jiandong Duan ◽  
Fan Liu ◽  
Yao Yang ◽  
Zhuanting Jin
Keyword(s):  
Natural Gas ◽  
Power System ◽  
Demand Response ◽  
Large Scale ◽  
Iterative Solution ◽  
Integrated System ◽  
Distributed Coordination ◽  
Gas System ◽  
Power To Gas ◽  
Natural Gas System

Aiming at the problem of insufficient flexibility of the power system caused by large-scale wind power grid integration, a flexible economic dispatch model of the electricity-gas integrated system that considers power-to-gas and demand responses is proposed. First, it elaborates on the scheduling flexibility and demand response model. Secondly, the power system and the natural gas system are regarded as different stakeholders; with the goal of minimizing their respective operating costs, a two-tier distributed coordination optimization model of electricity and gas system is established. In order to achieve the coordination and optimization of the upper and lower systems, slack variables are introduced to describe the infeasible part of the power system scheduling results in the natural gas system and are used for interactive iterative solution of the model. The numerical results of the revised IEEE 30-node power system and 10-node natural gas system illustrate the effectiveness and necessity of the proposed model, as well as the superiority of comprehensively considering power-to-gas and demand response in improving the flexibility and economy of the power system.

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 Research on the electricity-gas coupling system with P2G to absorb surplus hydropower

2021 ◽  
Vol 300 ◽  
pp. 01016
Author(s):  
Wei Wang ◽  
Chao Cheng ◽  
Xuna Liu ◽  
Jieying Liu ◽  
Chuan Long ◽  
...  
Keyword(s):  
Natural Gas ◽  
Power System ◽  
Gas Turbines ◽  
Operating Cost ◽  
Clean Energy ◽  
Light Load ◽  
Coupling System ◽  
Gas System ◽  
Natural Gas System ◽  
Hydropower Stations

With the rapid development of social economy, energy shortage and environmental pollution are becoming more and more serious, and clean energy power generation has become one of the measures to implement the sustainable development strategy. A large number of small and medium-sized hydropower stations in Southwest China have a large amount of surplus water due to light load and channel blockage. In response to this problem, a method of coupling the natural gas system and the power system using P2G and gas turbines is proposed to improve the absorption capacity of hydropower and reduce the amount of surplus water. In this article, a day-ahead economic dispatch model of electricity-gas coupling system(EGCS) is established with the goal of the lowest operating cost of the whole system, considering the output characteristics of run-off hydropower stations, natural gas system operation constraints, power system AC power flow and other constraints, and solve the model using the interior point method. The analysis of the calculation example shows that compared with the independent system, the EGCS can effectively reduce the amount of surplus water, improve the utilization rate of clean energy, and reduce the operating cost of the system. The rationality and effectiveness of the model are verified.

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