Interactive System Architecture for smart Charging

Implementation of Field Trials in Harmon-E

The interactive display presents the system architecture developed in the unIT-e² project and applied in the field. The architecture describes the conceptual structure and organization of a system, including its components and their interactions. Users can examine various use cases either in isolation or in combination by selecting individual or multiple use cases, in order to gain a comprehensive understanding of the architecture and its functionality in different scenarios.

In the Harmon-E cluster of the unIT-e² research project, the focus is on market-optimized, system- and grid-friendly charging of electric vehicles. Various use cases are developed, tested, and demonstrated in three field trials. These trials take place at different locations and involve various flexibilities as well as implementation prioritizations of the use cases.

Use Case am Eigenheim

1.1/1.2) Regulation-defined grid-serving flexibility

2.1/2.2) Market- (& grid-) serving flexibility

3.1/3.2) Ancillary services using flexibility – redispatch unIT-e²

4.1/4.2) Peak shaving using flexibility

5.1/5.2) Flexibility for PV self-consumption optimization

Use Case am MFH/Arbeitsplatz

1.3) Regulation-defined grid-serving flexibility

2.3/2.4) Market- (& grid-) serving flexibility

No Ancillary services use cases planned

4.3/4.4) Peak shaving using flexibility

show all use cases

Description

Icon	Description
	If necessary, the DSO transmits a power limitation (Plim) from the grid controller to the MPO as aEMP (GWA) as an ad-hoc signal via a proprietary interface.
	As aEMP, the MPO sends the Plim signal (LPC via CLS.EEDI) through the transparent CLS proxy channel of the SMGW to the HCU (CLS gateway) of the home. The HCU transmits Plim to the HEMS.
	As a GWA, the MPO sends the Plim signal to the SMGW in the home via an encrypted TLS channel using DIN VDE V 0418-63-8. The SMGW stores the transmitted Plim signal locally and transmits the Plim signal to the HEMS via the EEBUS protocol.
	As aEMP, the MPO sends the Plim signal (LPC via CLS.EEDI) through the transparent CLS proxy channel of the SMGW to the HCU (CLS gateway) of the workstation. The HCU transfers Plim to the load management system.
	As the GWA, the MPO sends the Plim signal to the SMGW at the workstation via an encrypted TLS channel using DIN VDE V 0418-63-8. The SMGW stores the transmitted Plim signal locally and transmits the Plim signal to the charging management system via the EEBUS protocol.
	The aggregator transmits the redispatch signal to the aEMP, which opens a transparent CLS channel through the SMGW to the HCU. The HCU transmits the signal to the HEMS.
	Alternative to 4a: The aggregator transmits the redispatch signal to the home's HEMS via the supplementary communication channel (WAN 2).
	The HEMS optimizes the connected components and transmits any control commands in the system-specific protocol to maintain the power limit (Plim).
	The aggregator transmits specific (flex) schedules to the charging management system at the workplace.
	Alternative to 7a: The aggregator transmits (flex) schedules directly to the vehicle (EV) via the OEM.
	The HEMS orchestrates the flexibilities with the aim of optimizing self-consumption (zero-point control at the grid connection) and forwards the schedules to the corresponding flexibility.
	DThe EVSE communicates (via ISO 15118-2 or -20) with the EV, transmits information and negotiates charging plans according to the specification.
	The charging management system optimizes the connected components and transmits any control commands in the system-specific protocol to comply with the Plim signal.
	The charging management system transmits information to the aggregator to create the (flex) schedules.
	The energy supplier transmits electricity market prices to the aggregator or the MPO.
	The aEMP transmits price tables (based on electricity market prices) via the SMGW to the HCU of the home (TouT via CLS.EEDI). The HCU transfers the price tables to the HEMS.
	The aggregator submits a request to the aEMP, which initiates the establishment of a transparent CLS proxy channel to the HCU, via which price information is transmitted to the property.
	Alternative to 13 a) The energy supplier submits a request to the aEMP, which initiates the establishment of a transparent CLS channel to the HCU, via which price information is transmitted to the property.
	The HEMS optimizes the schedules of the flexibilities based on the price table received and forwards the calculated schedules to the corresponding flexibility.
	The aggregator uses vehicle data, user charging requirements and market prices to calculate optimized (flex) schedules for EVs at the workplace.
	The aggregator exchanges information on the availability and use of flexibilities with the energy supplier.
	The charging management takes other loads into account and controls the charging of the flexibilities (EVs) with the aim of equalizing the power consumption and/or reducing the power peak (peak shaving).
	The charging management system translates the (flex) schedules of the aggregator into control commands for charging the vehicles and transmits these to the EVSE.
	The HEMS optimizes the schedules of the flexibilities with the aim of peak load capping (forecast-based) and forwards the calculated schedules to the corresponding flexibility.
	Information on the use of redispatch is shared between the crowd-balancing platform and the TSO/DSO redispatch system via a communication interface (API).
	Information on flex availability and signals for the use of redispatch are exchanged between the aggregator and the crowd-balancing platform via a communication interface (API). /span>
	Relevant vehicle status data is transmitted from the EV to the OEM's backend.
	The charging requirements set by the user in the app are transmitted to the aggregator's backend. Relevant vehicle status data is displayed to the user in the app.
	Relevant vehicle status data is transmitted from the EV to the aggregator via the OEM's backend.
	Charging requests based on vehicle and user data are transmitted (if necessary) to the backend of the HEMS or the backend of the aggregator.
	The requirements for the home set by the user in the HEMS app are transmitted to the HEMS backend. Status data is transmitted to the app and visualized
	Measurement, vehicle and user data/requirements are being exchanged between the HEMS-backend and the HEMS (if required).
	Relevant measurement data (TAF 7/ 9/ 10/ 14) is transmitted to the MPO as pEMP via SMGW at the home.
	Relevant measurement data (TAF 7/ 9/ 10/ 14) is transmitted to the MPO as pEMP via SMGW at the workstation.
	Relevant metering data (TAF 7) is transmitted by the MPO as pEMP to the energy supplier.
	Relevant metering data (TAF 7/ 14) is transmitted by the MPO to the aggregator as pEMP.
	Relevant metering data (TAF 9/10) is transmitted by the MPO to the DSO as pEMP via MAKO processes.
	Measured value recording of flexibilities via one or more MMEs and provision of the data to the SMGW.
	Relevant metering data (15min feed-in/feed-out power, TAF 7) is transmitted by the aggregator to the crowd balancing platform.
	Relevant metering data (15min feed-in/feed-out power, TAF 7) is transmitted by the MPO as pEMP to the crowd balancing platform.
	Relevant measurement data is transmitted from the charging management system to the aggregator's backend.
	The HEMS receives relevant measurement data (TAF7, TAF10) of the property from the Smart Meter Gateway (SMGW).

Abbreviations

Abbreviation	Descritpion
aEMp	active external market participant
CLS	controllable-local-system
CBP	crowd balancing plattform
DSO	distribution system operator
EV	electric vehicle
EVSE	electric vehicle supply equipment
GWA	gateway administrator
HAN	home area network
HCU	HAN communication adapter unit
HEMS	home energy management system
HP	heatpump
HSS	home storage system
MFH	multi-family home
mME	modern metering equipment
MPO	metering-point operator
pEMP	passive external market participant
PV	photovoltaic
SFH	single-family home
SMGW	smart meter gateway
TAF	tariff application cases
TCP	transmission control protocol
TSO	transmission system operator

The main goals of the Harmon-E cluster are:

Addressing the conflict of objectives between economic efficiency and network and system utility, and development of proposed solutions.

Testing various use cases with technically mature solutions in pilot operation and bidirectional charging in the lab.

Establishing a standardized and secure process chain to optimally use flexibility potential and achieve maximum customer satisfaction.

Analysis of the differences in the process chains of private homes and workplaces/commercial/multi-family houses.

The field trials include:

A trial with 19 private customers in the Oldenburg/Rastede area, aimed at testing market and network access to the electric vehicle.

A workplace trial in cooperation with Wernsing Feinkost, investigating the benefits of peak shaving as well as network- and market-friendly charging.

A trial in a new building with a heat pump near Bremen, equipped with various components for energy management and electromobility.

The illustration shown here demonstrates the architecture implemented in the field trial. The original planning version is still available for your review.

If you have any questions, please feel free to contact our representative Jeremias Hawran.

¹ current state of work. May be subject to change without notice.