Value of gas network infrastructure flexibility in supporting cost effective operation of power systems

Abstract

The electricity system balancing is becoming increasingly challenging due to the integration of Renewable Energy Sources (RES). At the same time, the dependency of electricity network on gas supply system is expected to increase, as a result of employing flexible gas generators to support the electricity system balancing. Therefore the capability of the gas supply system to deliver gas to generators under a range of supply and demand scenarios is of a great importance. As potential solutions to improve security of gas and electricity supply, this paper investigates benefits of employing flexible multi-directional compressor stations as well as adopting a fully integrated approach to operate gas and electricity networks. A set of case studies for a GB gas and electricity networks in 2030 have been defined to quantify the value of an integrated operation paradigm versus sequential operation of gas and electricity networks. The results indicate there are significant overall system benefits (up to 65% in extreme cases) to be gained from integrated optimization of gas and electricity systems, emphasizing the important role of gas network infrastructure flexibility in efficiently accommodating the expected expansion of intermittent RES in future power systems

Strategic-Agent Equilibria in the Operation of Natural Gas and Power Markets

“…is the profit of agent (i), x g the vector of gas variables, x (i) g the sub-vector (of vector x g ) of gas variables that pertains to agent (i), λ g , µ g vectors of dual gas variables, λ (i) g the sub-vector (of vector λ g ) of dual gas variables that pertains to agent (i), x e the vector of power variables, x (i) e the sub-vector (of vector x e ) of power variables that pertains to agent (i), λ e , µ e vectors of dual power variables, λ (i) e the sub-vector (of vector λ e ) of dual power variables that pertains to agent (i), o g the gas offer/bid vector, o Upper-level problem (1) and (2) represents the profit of the agent (revenue minus cost for a producer and utility minus payment for a consumer), while lower-level problems (3)-(5) and (6)- (8) represent the clearing of the gas and power markets, respectively.…”

“…However, tools to comprehend the effect of such interdependency are limited. Many of these tools adopt a centralized perspective, in which a single operator manages both the gas and power systems [3][4][5][6][7][8][9][10][11][12][13][14] , which is unrealistic. Representative references are briefly discussed below.…”

“…Chen et al [7] develop a joint gas and power market model that addresses wind power uncertainty and gas system congestion. Ameli et al [8] quantify the value of the flexibility of the gas system in accommodating intermittent renewable energy sources. Yang et al [9] propose a two-stage robust operation model that considers gas network dynamics and wind power uncertainty.…”

Does Increasing Natural Gas Demand in the Power Sector Pose a Threat of Congestion to the German Gas Grid? A Model-Coupling Approach

“…The second group of studies proposes stylized models that focus on interdependencies between different energy sectors, e.g., the power and gas sectors. These models reduce complexity by limiting the considered energy sectors, which allows for considering further technical constraints [20][21][22][23][24][25], considering strategic behavior [26] or dealing with uncertainties by using various methods like stochastic programming. An example of using integrated models to study the interdependencies between the gas and electricity sector can be found in [21], where the authors investigate disruption scenarios based on an exemplary network topology.…”

Multi-Agent Systems and Complex Networks: Review and Applications in Systems Engineering

“…Geographical and functional infrastructure interdependence between the national electricity grid (left) and the gas transmission infrastructure (right) for Great Britain.Figure adaptedfrom Reference[243].…”