modelBatterySystemEfficiency

Typical characteristic line of battery system efficiency (including inverter efficiency)

Extends from TransiEnt.Basics.Icons.Block.

Information

1. Purpose of model

Typical characteristic line of battery system efficiency (including inverter efficiency.

2. Level of detail, physical effects considered, and physical insight

(no remarks)

3. Limits of validity

(no remarks)

4. Interfaces

P_is: input for storage power in [W]

eta: output for efficiency while charging/discharging

5. Nomenclature

(no remarks)

6. Governing Equations

(no remarks)

7. Remarks for Usage

(no remarks)

8. Validation

Tested in check model "TransiEnt.Storage.Electrical.Base.Check.TestBatteryEfficiency"

9. References

[1] Arne Dörschlag, "Erbringung von Primärregelleistung durch Kleinbatteriespeicher im Poolverbund unter Berücksichtigung solarer Eigenstromoptimierung", M.S. thesis, Institute of Electric Power Systems and Automation, Hamburg of Technical University, Sep. 2014

10. Version History

Model created by Pascal Dubucq (dubucq@tuhh.de) on 01.10.2014

Quality check (Code conventions) by Rebekka Denninger on 01.10.2016

Parameters

Type	Name	Default	Description
SI.Power	P_el_n	1e3	Storage rated power
SI.Efficiency	eta_max	1	Upper limit of efficiency
SI.Efficiency	eta_min	0	Upper limit of efficiency
Real	a	0.1123	Approximation parameter (determined experimentally)
Real	b	1.329	Approximation parameter (determined experimentally)
Real	c	1.284	Approximation parameter (determined experimentally)
Real	d	0.7666	Approximation parameter (determined experimentally)

Connectors

Type	Name	Default	Description
TransiEnt.Basics.Interfaces.Electrical.ElectricPowerIn	P_is		Storage power in W
TransiEnt.Basics.Interfaces.General.EfficiencyOut	eta		Efficiency while charging / discharging

Components

Type	Name	Default	Description
Modelica.Units.SI.Efficiency	eta_cycle		Total cycle efficiency (eta_cycle = eta^2)
Real	P_star_abs	abs(P_is/P_el_n)	Absolute Storage power in p.u.