Solutions for Grid operators
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Solutions for EMS Providers
The EMS is the central logic for the management of energy flows inside the building. It bundles all energy-relevant controllable devices and adjusts their energy flows in the most efficient way. The EMS knows about the physical capacity restrictions of the building as well as temporary grid limitations or market driven energy tariffs and manages consumption and production accordingly. End-users do have the choice to set their preferences in terms of costs and comfort, which can be considered in the optimisation of energy flows by the EMS.
The EMS frequently considers the maximum available power that the house connection allows and manages connected devices accordingly. In case of an impending grid congestion, the DSO sends a signal to reduce the actual power consumption or feed-in of electricity at the building’s grid connection point. A control unit inside the house receives this signal and passes it on to the local Energy Management System (EMS) via EEBUS. The EMS acts upon the signal and adjusts, e.g. reduces, the energy flow inside the house and among connected devices accordingly. By taking into account the overall demand of the building i.e. of the other consumers in the household, an overload of the house connection is avoided and grid signals fulfilled. The EVSE/EV may be connected directly to the control box or through an EMS in case of multiple controllable devices such as PV and EV. The EV will be charged within the limits given by the DSO or the EMS. Through the option of power limitation, the EV user may get a higher connection capacity " hotspot_horizontal="40%" hotspot_vertical="72%" hotspot_icon_size="17px" tooltip_width="220px" tooltip_padding="|10px||10px|false|true" tooltip_text_margin="10px|10px||10px|false|false" tooltip_text_padding="|10px||10px|false|false" tooltip_desc_margin="|10px|10px|10px|false|false" tooltip_desc_padding="10px|10px|10px|10px|false|false" _builder_version="4.14.7" _module_preset="default" tooltip_text_font="|||on|||||" tooltip_text_text_color="#EF791F" tooltip_text_font_size="18px" tooltip_desc_text_color="#EDF4F9" tooltip_desc_font_size="14px" tooltip_text_text_shadow_style="preset1" tooltip_desc_text_shadow_style="preset3" global_colors_info="{}"][/dnhot_tooltip_child][/dnhot_tooltip]
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The HVAC may be connected directly to the control box or through an EMS in case of multiple controllable devices such as PV and heat pump. The heat pump will be operated within the limits given by the DSO or the EMS " hotspot_horizontal="40%" hotspot_vertical="72%" hotspot_icon_size="17px" tooltip_width="220px" tooltip_padding="|10px||10px|false|true" tooltip_text_margin="10px|10px||10px|false|false" tooltip_text_padding="|10px||10px|false|false" tooltip_desc_margin="|10px|10px|10px|false|false" tooltip_desc_padding="10px|10px|10px|10px|false|false" _builder_version="4.14.7" _module_preset="default" tooltip_text_font="|||on|||||" tooltip_text_text_color="#EF791F" tooltip_text_font_size="18px" tooltip_desc_text_color="#EDF4F9" tooltip_desc_font_size="14px" tooltip_text_text_shadow_style="preset1" tooltip_desc_text_shadow_style="preset3" global_colors_info="{}"][/dnhot_tooltip_child][/dnhot_tooltip]
The PV Inverter / Battery may be connected directly to the control box or through an EMS in case of multiple controllable devices such as PV and EV / heat pump. The PV inverter or battery will provide grid support (e.g. P, Q) according to DSOs’ setpoint " hotspot_horizontal="40%" hotspot_vertical="72%" hotspot_icon_size="17px" tooltip_width="220px" tooltip_padding="|10px||10px|false|true" tooltip_text_margin="10px|10px||10px|false|false" tooltip_text_padding="|10px||10px|false|false" tooltip_desc_margin="|10px|10px|10px|false|false" tooltip_desc_padding="10px|10px|10px|10px|false|false" _builder_version="4.14.7" _module_preset="default" tooltip_text_font="|||on|||||" tooltip_text_text_color="#EF791F" tooltip_text_font_size="18px" tooltip_desc_text_color="#EDF4F9" tooltip_desc_font_size="14px" tooltip_text_text_shadow_style="preset1" tooltip_desc_text_shadow_style="preset3" global_colors_info="{}"][/dnhot_tooltip_child][/dnhot_tooltip]
The EMS receives power limitation setpoint from control box and dispatches available power to the corresponding devices according to the comfort preferences set by the end-customer " hotspot_horizontal="40%" hotspot_vertical="72%" hotspot_icon_size="17px" tooltip_width="220px" tooltip_padding="|10px||10px|false|true" tooltip_text_margin="10px|10px||10px|false|false" tooltip_text_padding="|10px||10px|false|false" tooltip_desc_margin="|10px|10px|10px|false|false" tooltip_desc_padding="10px|10px|10px|10px|false|false" _builder_version="4.14.7" _module_preset="default" tooltip_text_font="|||on|||||" tooltip_text_text_color="#EF791F" tooltip_text_font_size="18px" tooltip_desc_text_color="#EDF4F9" tooltip_desc_font_size="14px" tooltip_text_text_shadow_style="preset1" tooltip_desc_text_shadow_style="preset3" global_colors_info="{}"][/dnhot_tooltip_child][/dnhot_tooltip]
DSO requests metering information of total consumption and may send setpoints in case of high grid loads to EMS or device " hotspot_horizontal="40%" hotspot_vertical="72%" hotspot_icon_size="17px" tooltip_width="220px" tooltip_padding="|10px||10px|false|true" tooltip_text_margin="10px|10px||10px|false|false" tooltip_text_padding="|10px||10px|false|false" tooltip_desc_margin="|10px|10px|10px|false|false" tooltip_desc_padding="10px|10px|10px|10px|false|false" _builder_version="4.14.7" _module_preset="default" tooltip_text_font="|||on|||||" tooltip_text_text_color="#EF791F" tooltip_text_font_size="18px" tooltip_desc_text_color="#EDF4F9" tooltip_desc_font_size="14px" tooltip_text_text_shadow_style="preset1" tooltip_desc_text_shadow_style="preset3" global_colors_info="{}"][/dnhot_tooltip_child][/dnhot_tooltip]
Capacity Management on Building Level
Time of Use Tariffs
Time of use tariffs can origin either from the DSO based on dynamic transmission fees or from the energy supplier based on energy market prices. Either way, tariff information, on the form of energy price tables, are sent from the respective operator via the smart meter gateway infrastructure to the EMS inside the house.
Depending on the end user preferences and demands, the EMS manages the load of connected devices accordingly. This allows for a cost-optimised power purchase or revenue-optimised feed-in for own power generation.
The EVSE/EV may be connected directly to a gateway or through an EMS in case of multiple devices such as PV and EV. The EV will choose the best price option according to its’ energy demand and submit a charging plan to the EMS.
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DSO
requests metering information of total consumption and may send setpoints in case of high grid loads to EMS or device.
EMP
As market representative the External Market Participant (EMP) may submit high price of energy in case of energy shortage or low price of energy in case of excess energy to optimize trading.
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The heat pump may be connected directly to a gateway or through an EMS in case of multiple devices such as PV and heat pump. The heat pump will choose the best price option according to its’ energy demand and submit a consumption plan to the EMS.
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The PV Inverter / Battery may be connected directly to a gateway or through an EMS. The EMS or device will get feed-in tariffs for grid services such as P or Q and may offer the specific service to get the incentive.
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The EMS receives the time of use tariff through a gateway or cloud service and offers the energy through incentive tabled to the connect devices. The devices will choose the best price option according to their energy demands and submit a consumption plan to the EMS
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The white good device will get a smart start signal from the EMS in case energy is cheap.
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Increase of Self Consumption
The local EMS controls and influences the electricity flows inside the building under consideration of actual own power generation and in alignment with current electricity prices. In the presence of a solar power system, free solar power is preferentially used for large consumers inside the building, e.g. to charge the EV or start the heat pump.
The EMS also considers the forecast hours of sunshine and the time of departure and the current energy demand of the EV. The end user benefits from reduced energy costs while improving his ecological footprint.
The Meter is providing the buildings’ total power consumption to the EMS to enable zero consumption or feed-in.
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The EVSE/EV
submits its energy demands and departure time to the EMS. If the user choses CO2 friendly charging the EMS takes care about charging with high portion of PV energy. In case of a bidirectional EV is attached the EVs battery may be discharged for the home supply if it is ensured that it is charged up to the departure time according the user’s preferences.
The battery
enables to storing of PV energy for later use. Within its operating limits it is controlled by the EMS
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The heat pump submits its energy demand to the EMS. In case of the PV inverter needs to be power curtailed the heat pump may run a domestic hot water (DHW) session for free and C02 neutral.
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The PV inverter is producing as much as possible PV energy without any power curtailment through legislation or power limitation by the DSO. The production is used to supply the device’s demands and for battery storage.
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The EMS knows about all energy demands including the base load of the building as well as the PV production forecast. From this the EMS derives the optimal operation schedules of the devices without loss of comfort. If there is a major change in energy production or demand the EMS will recalculate the operation schedules.
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The white good device will get a smart start information from the EMS according to the operation schedule derived by the EMS.
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Monitoring and Comfort
EEBUS seamlessly connects all energy-relevant devices inside the house and provides a standardised interface to the integration in the end user ‘s smart home. By visualising the information about the customers energy flows retrieved from the EEBUS communication, manufacturers can contribute to the overall transparency for the end-user and other applications.
Added value for the overall comfort can be achieved by connecting these energy management relevant information to smart home applications and e.g. allow AI algorithms to develop forecasts or energy efficiency suggestions for the end-user.
The Meter is providing the buildings’ total power consumption to the EMS.
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The EVSE/EV
provides its state of charge, power consumption and charging history report to the EMS.
The battery
enables to storing of PV energy for later use. Within its operating limits it is controlled by the EMS.
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The heat pump provides the power consumption to the EMS and adjusts temperature settings.
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The PV inverter provides all relevant inverter data for simple to complex energy management functionalities.
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The EMS aggregates information for visualization and parametrization.
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The battery provides all relevant battery data for simple to complex energy management functionalities.
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Solutions for device manufactures
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Examples of the industry
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01
Audi promotes EEBUS Standard for Intelligent Connection of Electric Cars and Buildings
AUDI
02
"Ich will glückliche Kunden schaffen Headline mit 3 Zeilen"
VOLKSWAGEN
03
How Audi and SMA Are Connecting E-Mobility and Solar Power
Audi AG/SMA AG
Research Projects
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Unite-e
How electromobility can be optimally integrated into the power grid is being investigated by the research project "unIT-e² - Reallabor für verNETZte E-Mobilität" in four field tests across Germany. To approach the complex topic from all sides at the same time, 29 partners from the automotive and energy industries, IT and charging infrastructure as well as science are participating in the joint project. The focus is on the user-friendly, large-scale implementation of bidirectional charging concepts. The three-year project is funded by the Federal Ministry for Economic Affairs and Energy (BMWi). Holistic solutions are being developed in the project for the further ramp-up of electromobility.
Test locations/sites:
Urban areas of Munich and Düsseldorf as well as rural based field tests in Eastern Bavaria, Lower Saxony and Northern Hesse.
Working groups:
E-Mobility, HVAC, Inverter, Grid
Our Partners:
