Optimal dispatch strategy for integrated energy systems with CCHP and wind power

Li, Guoqing; Zhang, Rufeng; Jiang, Tao; Chen, Houhe; Bai, Linquan; Cui, Hantao; Li, Xiaojing

doi:10.1016/j.apenergy.2016.08.139

Cited by 205 publications

(70 citation statements)

References 31 publications

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“…On the other hand, traditional power systems are undergoing transitions towards integrated energy distribution systems (IEDS) [14], where the interdependencies and synergy effects among various energy sectors are highlighted, including the electric power system (EPS), natural gas system (NGS), and district heating system (DHS). The transitions have gained popularity in both academia and industry [15]. In addition, controllable resources both on the supply and demand sides can be regulated and integrated as flexible participants [16,17], which also provides new pathways to the development of ESSs.…”

Section: Introductionmentioning

confidence: 99%

Research on Modeling and Hierarchical Scheduling of a Generalized Multi-Source Energy Storage System in an Integrated Energy Distribution System

Wang

Liu

et al. 2019

Energies

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Energy storage systems play a crucial role in ensuring stable operation. However, the development of system-level energy storage is hindered due to the restrictions of economy, geography, and other factors. Transitions of traditional power systems into integrated energy distribution systems (IEDS) have provided new solutions to the problems mentioned above. Through intelligent control management methods, the utilization of multi-energy-type resources both on the supply and demand sides shows the potential for equivalent storage characteristics. Inspired by the aggregation principles, this paper aims at proposing a novel model named generalized multi-source energy storage (GMSES), including the modeling and cooperation of three kinds of available resources: conventional energy storage (CES), multi-energy flow resources (MFR), and demand response resources (DRR). Compared with the conventional means of storage, GMSES can be regarded as a more cost-effective and flexible participant in the proposed hierarchical energy scheduling framework that can realize system-level storage services in IEDS. On this basis, a multi-timescale energy scheduling strategy is proposed to reshape the regulation of IEDS operations and deal with the fluctuations caused by renewable energy and loads, where the general parameter serialization (GPS)-based control strategy is utilized to select and control the responsive loads in DRR. Furthermore, a hierarchical scheduling algorithm is developed to generate the optimal set-points of GMSES. Case studies are analyzed in an electricity-gas coupled IEDS. The simulation results show that the coupled co-optimization GMSES model is conducive to achieving the goal of self-management and economical operation, while the influence of the underlying IEDS on the upper energy system is reduced, as the tie-line power fluctuations are smoothed out.

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Section: Introductionmentioning

confidence: 99%

Research on Modeling and Hierarchical Scheduling of a Generalized Multi-Source Energy Storage System in an Integrated Energy Distribution System

Wang

Liu

et al. 2019

Energies

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“…In this paper, we only consider the passive pipelines. The natural gas flow in the pipelines can be modeled by the Weymouth equation [33]:…”

Section: Natural Gas Networkmentioning

confidence: 99%

“…To improve the computation efficiency, the Weymouth equation is linearized by a piecewise linear function [33,34]. First, Equation (4), when π m ≥ π n , can be expressed as (6).…”

Section: Natural Gas Networkmentioning

confidence: 99%

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

Yuan

2017

Sustainability

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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.

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“…Reference [26] presented a long-term, multistage, and multiarea model for the supply/interconnections expansion planning of IES with considering the natural gas value chain and electrical systems value chain. Reference [27] developed a comprehensive and systematic planning model to understand, optimize and develop energy grids to reach higher social welfare with consideration of the expansion of natural gas-fired generators, electricity transmission lines and gas pipelines.As other coupling technologies, combined heat and power system (CHP) and combined cooling heating and power system (CCHP) are gaining increasing importance and attention in the process of system planning and operation schedule [28][29][30][31][32][33]. The CCHP integrates the prime mover, the alternator, the refrigeration equipment, and the heat recovery system to implement the cascade use of energy [34].…”

mentioning

confidence: 99%

“…As other coupling technologies, combined heat and power system (CHP) and combined cooling heating and power system (CCHP) are gaining increasing importance and attention in the process of system planning and operation schedule [28][29][30][31][32][33]. The CCHP integrates the prime mover, the alternator, the refrigeration equipment, and the heat recovery system to implement the cascade use of energy [34].…”

mentioning

confidence: 99%

Optimal Planning of Integrated Energy Systems Based on Coupled CCHP

2018

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With the widespread attention on clean energy use and energy efficiency, the integrated energy system (IES) has received considerable research and development. This paper proposed an electricity-gas IES optimization planning model based on a coupled combined cooling heating and power system (CCHP). The planning and operation of power lines and gas pipelines are considered. Regarding CCHP as the coupled hub of an electricity-gas system, the proposed model minimizes total cost in IES, with multistage planning and multi-scene analyzing. Renewable energy generation is also considered, including wind power generation and photovoltaic power generation. The numerical results reveal the replacing and adding schemes of power lines and gas pipelines, the optimal location and capacity of CCHP. In comparison with conventional separation production (SP), the optimization model which regards CCHP as the coupled hub attains better economy. At the same time, the influence of electricity price and natural gas price on the quantities of purchasing electricity and purchasing gas in the CCHP system is analyzed. According to the simulation result, a benchmark gas price is proposed, which shows whether the CCHP system chooses power generation. The model results and discussion demonstrate the validity of the model.Energies 2018, 11, 2621 2 of 27 developed a linear energy hub model based on variables to prevent the introduction of dispatch factor variables. Reference [8] proposed a novel decentralized multi-carrier OPF of large-scale IES in a carbon-trading market to give full play to environmental and economic advantages of the system. Reference [9] concentrated on an integrated formulation for the steady-state analysis of electricity-gas coupled systems and proposed a general method to execute a single power and a single gas flow analysis in a uniform framework based on the Newton-Raphson formulation. Reference [10] presented a method for integrated optimization of coupled power flows of various energy infrastructures such as gas, electricity, and district heating systems. Reference [11] proposed a multi-agent genetic algorithm to decompose the multi-energy OPF problem into the separate traditional OPF problem in such a way that most advantages of integrated analysis of IES would be reserved. Reference [12][13][14][15][16][17][18][19] studied the interdependency of IES for system reliability evaluation and flexibility assessment. Reference [12] introduced a new reliability assessment approach to IES, which proposes a hierarchical decoupling optimization framework for both the OPF problems and the energy hub optimal dispatch and accommodates an impact-increment-based state enumeration method to accelerate the reliability assessment process. Reference [13] presented an original methodology to assess the flexibility that the gas system can provide to the power system and introduced a novel metric to evaluate the integrated electrical and gas flexibility, which is used to impose gas-related inter-temporal inter-network constraints on the ...

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Optimal dispatch strategy for integrated energy systems with CCHP and wind power

Cited by 205 publications

References 31 publications

Research on Modeling and Hierarchical Scheduling of a Generalized Multi-Source Energy Storage System in an Integrated Energy Distribution System

Research on Modeling and Hierarchical Scheduling of a Generalized Multi-Source Energy Storage System in an Integrated Energy Distribution System

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

Optimal Planning of Integrated Energy Systems Based on Coupled CCHP

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