Sensitivity factors in electricity-heating integrated energy systems

Dancker, Jonte; Kärgel, Christian; Wolter, Martin

doi:10.1016/j.energy.2021.120600

Cited by 16 publications

(14 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The consumed power in (39), however, is determined by P p,N,cu,calc in (5), calculated in each Newton-Raphson iteration. Hence, (39) is rewritten as: (40) with F conv,cu being the diagonal matrix of the conversion factors f conv,cu and I CUNps ∈ R CU ×N ps being the incidence matrix indicating at which node in the EPS the coupling units are placed, ensuring a correct assignment of the electric power to each unit. The minus sign converts a consumption into a generation for the power flow calculation.…”

Section: E Coupling Between Energy Systemsmentioning

confidence: 99%

“…This operation flexibility can be implemented in the power flow calculation by linearizing the behavior or setting the power and heat generation prior to the power flow calculation as in [23]. The behavior can be linearized either along a polyhedron's boundary as in [18], assuming a constant gas consumption, or based on an initial operation point and the direction of a power change as discussed in [40]. In a backpressure CHP unit, on the other hand, the heat and power generation are directly linked by a constant heat-to-power ratio, which is comparable to the conversion factor f conv in (39).…”

Section: E Coupling Between Energy Systemsmentioning

confidence: 99%

“…The GB not only connects the GS and DHS but also affects the EPS through the circulation pump, associated with the GB. The heat-to-power Jacobian matrix J h2p contains non-zero elements if a heat-led coupling unit in the DHS affects the EPS [40]:…”

Section: Joined Quasi-steady-state Power Flow Calculationmentioning

confidence: 99%

“…The derivatives ∂p p,N /∂q T m,E and ∂p p,N /∂ϑ T N are non-zero if a heat-led coupling unit is connected, such as an EB, heat pump or CHP unit [40]. The derivative ∂p p,N /∂ π T CE is non-zero if a circulation pump is connected at a heat-led VOLUME 10, 2022 coupling unit [40]. It has to be noted that circulation pumps which are associated with power-led coupling units are not considered in J h2p .…”

Section: Joined Quasi-steady-state Power Flow Calculationmentioning

confidence: 99%

“…The power-to-heat Jacobian matrix J p2h contains non-zero elements if a power-led coupling unit represents a heat supplier in the DHS [40], such as CHP unit, heat-pump or EB:…”

Section: Joined Quasi-steady-state Power Flow Calculationmentioning

confidence: 99%

See 4 more Smart Citations

A Joined Quasi-Steady-State Power Flow Calculation for Integrated Energy Systems

Dancker

Wolter

2022

IEEE Access

Self Cite

View full text Add to dashboard Cite

The network storage capability of district heating systems and gas systems can provide a considerable flexibility in integrated energy systems, increasing the use of volatile renewable energy generation. But the stronger the single energy systems are linked the more complex their operation becomes due to their increased interactions. To ensure a secure and reliable system operation while using the full potential of integrated energy systems, these interactions must be analyzed. Existing power flow calculation methods, however, assume a steady-state behavior of all energy systems in the integrated energy system, neglecting the network storage capability. Hence, this paper presents a joined quasi-steady-state power flow calculation method for integrated energy systems. Our method introduces the dynamic behavior of the district heating system arising from the temperature propagation and the dynamic behavior of the gas system due to the gas compressibility and propagation of hydrogen. In a comparison with a steady-state power flow calculation we show the considerable effect of the network storage on the operation of an integrated energy system. As our method enhances existing steady-state power flow calculation methods, it can be easily used for the same use cases but allowing the full potential of integrated energy systems to be investigated.INDEX TERMS Quasi-steady-state, integrated energy system, power flow calculation, Newton-Raphson method, gradient method.

show abstract

Section: E Coupling Between Energy Systemsmentioning

confidence: 99%

Section: E Coupling Between Energy Systemsmentioning

confidence: 99%

Section: Joined Quasi-steady-state Power Flow Calculationmentioning

confidence: 99%

Section: Joined Quasi-steady-state Power Flow Calculationmentioning

confidence: 99%

“…The power-to-heat Jacobian matrix J p2h contains non-zero elements if a power-led coupling unit represents a heat supplier in the DHS [40], such as CHP unit, heat-pump or EB:…”

Section: Joined Quasi-steady-state Power Flow Calculationmentioning

confidence: 99%

See 3 more Smart Citations

A Joined Quasi-Steady-State Power Flow Calculation for Integrated Energy Systems

Dancker

Wolter

2022

IEEE Access

Self Cite

View full text Add to dashboard Cite

show abstract

Advanced Technologies in Integrated Energy Systems

Maheedhar,

Deepa

2023

Integrated Green Energy Solutions Volume 1

View full text Add to dashboard Cite

Various disturbances propagation analysis of district heating system based on the standardized thermal resistance method

Chen,

Wang,

Hao

et al. 2023

Energy Science & Engineering

View full text Add to dashboard Cite

Various heating disturbances and faults in the heating network are necessary to be controlled and handled by some intelligent heating strategies with the increasing complexity of the heating network. This paper constructed the dynamic modeling of the heating system using standard thermal resistance and obtained a dynamic heat current model of the heating system. On this basis, we analyzed the heat transfer performance of the heating system. Five disturbances are selected, including the behavior of users, indoor heat source, heat exchanger heat transfer performance deterioration, pipe blockage, and pipe leakage. The effects of different disturbances on the overall system and user side water supply temperature were obtained by establishing a dynamic model for segmented heating pipelines. Feasible control methods for the heating network and load side are sorted out, mainly changing the water supply's temperature and the water supply's flow rate to reduce the water supply's fluctuation. Five specific control strategies are proposed for five types of disturbances. Comparing the case without control and the case with control, the results show that the fluctuation of water supply temperature is significantly reduced, and the control strategies can reduce the impact of disturbances on the heat network system and customers and improve the comfort of customers in the presence of disturbances. under the disturbance of pipeline leakage, the method proposed in this article reduces the temperature fluctuation amplitude by 75% and the fluctuation duration by 60%.

show abstract

Sensitivity factors in electricity-heating integrated energy systems

Cited by 16 publications

References 23 publications

A Joined Quasi-Steady-State Power Flow Calculation for Integrated Energy Systems

A Joined Quasi-Steady-State Power Flow Calculation for Integrated Energy Systems

Advanced Technologies in Integrated Energy Systems

Various disturbances propagation analysis of district heating system based on the standardized thermal resistance method

Contact Info

Product

Resources

About