Integrated Natural Gas, Heat, and Power Dispatch Considering Wind Power and Power-to-Gas

Abstract

A large amount of wind power has to be curtailed due to the inflexibility of the combined heat and power (CHP) system in the heating season in northern China. The power-to-gas (P2G) technology, which uses electricity to produce hydrogen or synthetic natural gas, has become a promising energy conversion option for the utilization of surplus power energy. In this paper, an integrated natural gas, heat, and power dispatch (INGHPD) model which balances natural gas, heat, and power demand considering wind power and a P2G unit, is proposed. A natural gas network and P2G are modeled and integrated into the dispatch model. To demonstrate the effectiveness of the proposed model, an integrated energy system consisting of a six-bus power system, a six-node natural gas system, and a district heating system is simulated. The benefits of P2G are investigated in terms of reducing wind power curtailment, as well as system operation cost and CO 2 emissions. The results in the deterministic model show that with the introduction of 40 MW P2G, the wind power curtailment rate decreases from 24.0% to 9.7%. The daily wind power energy consumed by P2G reaches 256 MWh and the daily CO 2 emissions reduction reaches 46,080 kg. Additionally, the impact of the power and heat demand on the gas production of P2G and of the P2G capacity on the wind power curtailment are also investigated. P2G tends to generate more natural gas when the power demand is low and the heat demand is high.

Combined Heat and Power Dispatch Considering Heat Storage of Both Buildings and Pipelines in District Heating System for Wind Power Integration

“…Supply and return water temperatures limits: Equations (11) and (12). Mass flow rates continuity and limits: Equations (13) and (14). Node temperature characteristics: Equation (15).…”

“…Moradi et al [12,13] introduced a novel approach for optimal management of multi-energy including heating, cooling and power in residential buildings to achieve high energy efficiency, low greenhouse gas emission and low generation cost. Ye et al [14] proposed an integrated natural gas, heat and power dispatch model considering wind power and a power-to-gas unit to reduce wind power curtailment, fuel cost and CO 2 emissions.…”

Techno-economic feasibility of power to gas–oxy-fuel boiler hybrid system under uncertainty

“…Probabilistic optimal power flow models have also been used to simulate the operation of coupled electric power and natural gas systems multiple periods to avoid overly-optimistic solutions in the design [15]. Other similar works have also considered the natural gas, heat, and power demand balances using deterministic models to wind power and the PtG system [16].…”

“…A stochastic analysis, which comprises a set of analytical tools that systematically consider uncertainty impact on the key performance indicators [16,19], have been applied to techno-economic assessments of engineering systems to provide a profound insight into their operation and performance [19], to calculate the effect on levelized cost of electricity [20,21] or to analyse CO 2 capture and storage systems [22e24]. Consideration of the uncertainty in the operating conditions at the process design stage can reduce the occurrence of the failures associated with vibration stresses and unstable operation [25e27], equipment overheating [25], and other failures associated with poor design and increased complexity [28].…”

Optimal Operation of a Grid-Connected Hybrid Renewable Energy System for Residential Applications

“…Integration options for CHP and renewable energy have been reviewed [4], and optimization studies have been carried out for hybrid renewable energy systems comprised of various energy sources and technologies [5]. For example, studies have been published on hybrid renewable energy systems [6] involving two main energy technologies, such as solar-fuel cell systems [7], solar-biofuel systems [8], solar-battery systems [9], solar-thermal-PV systems [10], solar micro-generation systems [11], PV-wind systems connected to the electrical grid [12], solar-wind systems for remote regions [13], and wind-fuel cell systems [14].…”