Microgrid control systems
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General information
| Name of company | OpenEMS Asscociation |
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| Website of company | www.openems.io |
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| Name of product | OpenEMS |
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| Product is hardware and/or software-platform | pure software-platform |
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| Product standardized or project-specific? | both |
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| Distribution in which countries? | worldwide |
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| Unique selling proposition of the product | OpenSource system |
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| Comments | OpenEMS was awarded with different awards, e.g. PV Magazine Energy Storage Highlight 2019 (3rd place) and PV Magazine Top Business Model 2018. More than 200 developers are working for OpenEMS in different public R&D projects and at the member companies. |
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Services of the company
| Company produces microgrid control hardware | no |
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| Company programs microgrid control software | yes |
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| Company provides system integration of microgrid control hardware and software | no |
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| Company provides EPC services for microgrid projects | no |
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| Company provides operations and maintenance of microgrids | no |
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| Comments | |
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Scope of control system
| Central monitoring and control unit (Hardware) | yes |
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| Control unit is standalone product or integrated into other device (if latter, which device?) | runs on each Linux PC |
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| Other hardware components (e.g. smart meters, sensors, switches, domestic appliances, …) | many implemented devices |
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| Software-Platform for monitoring and control of the microgrid | yes |
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| Software-Platform is a cloud solution or installed on own server or computer? | both is possible |
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| Software compatible with third party hardware? | yes |
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| Hardware compatible with third party software? | |
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| Monitoring and/or control of microgrid via smartphone app? | yes |
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| Comments | |
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Microgrid layout
| Which customers is the product aimed at? (e.g. residential, commercial, industrial, community, campus, military, …) | residential, commercial, industrial, community, campus, virtual power plants, power quality and grid support |
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| Focus on offgrid, grid-connected or mobile microgrids? | grid-connected |
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| How many kilowatts of installed generating power can be integrated? (FROM - TO) | unlimited |
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| How many different generators can be integrated? | unlimited |
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| AC bus system | yes |
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| DC bus system | opt. |
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| Hybrid AC and DC bus system | opt. |
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| Which control strategy is used to run the microgrid? (e.g. central control, master/slave control, distributed control, …) | central control |
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| Which components are needed for grid forming in islanding operation? (e.g. battery, diesel generator, …) | PCS with island mode or diesel generator |
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| Can the system be retrofitted to existing energy system assets? | yes |
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| Can the system be expanded modularly after initial commissioning? | yes |
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| Comments | |
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Connectivity
| Supported communication protocols (e.g. Modbus TCP, Sunspec, KNX, Zigbee, …) | all available protocols, see www.openems.io |
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| Supported communication interfaces (e.g. RS485, Ethernet, Wireless LAN, analog inputs an outputs, …) | all available communication interfaces, see www.openems.io |
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| Connectable generators (e.g. solar PV, wind turbines, CHP, diesel generators, fuel cells, hydro power plants, …) | all generators |
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| Connectable storage systems (e.g. batteries [lead, lithium, redox flow, …], flywheels, heat storage, …) | all storage systems |
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| Connectable loads (e.g. heat pumps, heating boilers, charging stations for e-mobility, refrigerators, …) | all loads |
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| What components/brands can be integrated 'plug & play'? | abstract platform approach allows to integrate all components by plug&play as long as relevant interface and protocol are implemented |
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| What components/brands have to be integrated manually? | manual integration is easily accessible due to open source approach |
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| How are components integrated manually? (e.g. connection boxes, command-line interface, ...) | depends on EMS hardware |
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| Software-Platform has graphical user interface for integration and configuration of external devices? | yes |
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| Software-Platform has graphical user interface for programming energy management options? | yes |
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| Communication between control system and energy system assets is wired or wireless? | both |
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| SCADA integration possible? | yes |
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| Other options to connect the microgrid to a higher-level distribution grid (e.g. smart meter gateway, CLS-interface, ...) | yes, on application basis |
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| Can smart home systems be integrated into the microgrid? | yes |
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| Is the data encrypted during data transfer? If so, how? | yes |
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| How is the system protected against threats from outside? | encrypted communication |
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| How are firmware updates realized? | automatic release |
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| Comments | |
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Functions
| Grid conntected operation | yes |
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| Islanding operation | yes |
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| Automated transition from islanding to grid-connected mode and back | yes |
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| Time required for transition from grid-connected to islanded mode (in seconds) | 1 |
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| Uninterruptible Power Supply (UPS) | yes |
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| Operation is also possible without connection to the internet | in grid connected and islanding mode |
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| Operation is also possible without connection to control room of higher-level distribution system operator (DSO) | in grid connected and islanding mode |
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| Asset control of distributed energy resources | yes |
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| Load management defining curtailable loads and priority loads | yes |
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| Automated dispatch control and optimization | yes |
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| Automated Re-dispatching in response to external orders or unplaned internal events | yes |
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| Internal voltage and frequency regulation in islanding mode | yes |
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| Real time active and reactive power control | yes |
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| Control of power exchange and voltage levels at point of interconnection | yes |
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| Aggregated ramp rate control at point of interconnection | yes |
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| Phase balancing between different AC phases | yes |
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| Black start capability | yes |
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| Comments | |
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Energy management options
| Increase in self consumption | yes |
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| Increase of self-sufficiency | yes |
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| Peak Shaving | yes |
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| Charging of electric vehicles | yes |
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| Energy management of thermal energy assets? (e.g. heat pumps, thermal storage, ...) | yes |
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| Backup power | yes |
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| Zero feed-in | yes |
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| Ancillary services for public grid (e.g. frequency regulation, reactive power control, …) | frequency regulation, reactive power control, phase balancing |
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| Consideration of weather forecasts | yes |
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| Consideration of energy load predictions | yes |
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| Consideration of changing energy prices on the energy market | yes |
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| Use of AI or self-lernings algorithms | yes |
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| Blockchain based billing and/or pay as you go solution | opt. |
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| Participation in the energy market | yes |
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| Comments | all functions are bases on apps and can also be used in any combination |
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Price indication
| Hardware: One-time acquisition costs for central control unit (without VAT) FROM - TO (approx. retail price in Euro) | |
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| Hardware: Monthly maintenance costs for central control unit (without VAT) FROM - TO (approx. retail price in Euro) | |
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| Hardware: Costs for other necessary system components? (e.g. smart meters, switches, …) | |
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| Software: One-time acquisition costs (without VAT) FROM - TO (approx. retail price in Euro) | depending on app prices; apps are provided by different companies on an app store |
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| Software: Monthly maintenance costs (without VAT) FROM - TO (approx. retail price in Euro) | |
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| Are there renting or leasing options? If so, what are those options? | |
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| Comments | Apps are either based on one-time acquisition costs or monthly rates, depending on the business case of the app developer |
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| Price information available | no |
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Best practice project
| Information on reference projects available | yes |
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| Best practice project - ongrid | 5 ESS with 100 kW / 120 kWh each in Vienna are connected to the LV-side of grid transformers; they combine following apps: 1) peak-shaving, 2) feed-in shaving, 3) phase balancing, 4) VPP connection to Wien Energie for energy market participation, 5) SCADA connection to Wiener Netze for DSO grid support; https://fenecon.de/blog/neues-von-fenecon-1/post/projektexpose-netzspeicher-43 |
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| Best practice project - offgrid | Project in Bavaria with 20 kW woodgas-powered CHP unit (Spanner re²) and DC-connected FENECON Commercial system; commissioned in 2016, EMS manages PV, CHP, storage system and blackstart-/island operation |
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Data update
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