Microgrid control systems

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General information

Name of companyInaccess
Website of companywww.inaccess.com
Name of productUNITY H-PPC
Product is hardware and/or software-platformhardware & software platform
Product standardized or project-specific?standardized
Distribution in which countries?worldwide
Unique selling proposition of the productProgrammable Hybrid Power Plant Controller
CommentsPV, Batteries, Diesel GenSet, Li-Ion, Lead-Acid

Services of the company

Company produces microgrid control hardwareyes
Company programs microgrid control softwareyes
Company provides system integration of microgrid control hardware and softwareyes
Company provides EPC services for microgrid projectsno
Company provides operations and maintenance of microgridsno
CommentsUNITY H-PPC is targeted to Owners, EPCs and O&Ms globally

Scope of control system

Central monitoring and control unit (Hardware)yes
Control unit is standalone product or integrated into other device (if latter, which device?)Standalone; can be also integrated into Inverter Containers
Other hardware components (e.g. smart meters, sensors, switches, domestic appliances, …)Includes optionally Meters, Networking, Comms
Software-Platform for monitoring and control of the microgridyes
Software-Platform is a cloud solution or installed on own server or computer?both is possible
Software compatible with third party hardware?yes
Hardware compatible with third party software?yes
Monitoring and/or control of microgrid via smartphone app?yes
CommentsH-PPC is integrated to UNITY-CMS (Central Cloud Monitoring)

Microgrid layout

Which customers is the product aimed at? (e.g. residential, commercial, industrial, community, campus, military, …)Oil & Gas, Utility, Industrial, Commercial, Community, Campus, Military, Large Residential
Focus on offgrid, grid-connected or mobile microgrids?All Off Grid, Grid Connected, Mobile are supported
How many kilowatts of installed generating power can be integrated? (FROM - TO)10 KW - 100 MW
How many different generators can be integrated?unlimitted
AC bus systemyes
DC bus systemopt.
Hybrid AC and DC bus systemopt.
Which control strategy is used to run the microgrid? (e.g. central control, master/slave control, distributed control, …)All strategies are supported through UNITY PPCs architecture: Central Control for single-site, Master/Slave or Distributed Control optionally for larger sites
Which components are needed for grid forming in islanding operation? (e.g. battery, diesel generator, …)Battery, DG can be used, depending on Site Configuration
Can the system be retrofitted to existing energy system assets?opt.
Can the system be expanded modularly after initial commissioning?opt.


Supported communication protocols (e.g. Modbus TCP, Sunspec, KNX, Zigbee, …)Modbus, DNP3, IEC, OPC
Supported communication interfaces (e.g. RS485, Ethernet, Wireless LAN, analog inputs an outputs, …)RS485, Ethernet, Analog/Digital Inputs/Outputs
Connectable generators (e.g. solar PV, wind turbines, CHP, diesel generators, fuel cells, hydro power plants, …)PV, Wind, CHP, DG, FuelCells, Hydro
Connectable storage systems (e.g. batteries [lead, lithium, redox flow, …], flywheels, heat storage, …)Batteries Lithium, Lead, others
Connectable loads (e.g. heat pumps, heating boilers, charging stations for e-mobility, refrigerators, …)Any
What components/brands can be integrated 'plug & play'?Most vendors available today; others at client's request
What components/brands have to be integrated manually?Any new vendor can be added at client's request
How are components integrated manually? (e.g. connection boxes, command-line interface, ...)New Configuration File, Online Spreadsheet-like config
Software-Platform has graphical user interface for integration and configuration of external devices?opt.
Software-Platform has graphical user interface for programming energy management options?opt.
Communication between control system and energy system assets is wired or wireless?wired communication
SCADA integration possible?yes
Other options to connect the microgrid to a higher-level distribution grid (e.g. smart meter gateway, CLS-interface, ...)Configurable
Can smart home systems be integrated into the microgrid?opt.
Is the data encrypted during data transfer? If so, how?Yes; end to end SSL encryption, SSL certificates & SSH Keyes deployed everywhere
How is the system protected against threats from outside?PKI infrastructure everywhere, Access based on SSH keys, Authentication SSL certificates, additionally firewalls deployed in each of the sites
How are firmware updates realized?Over secure channels


Grid conntected operationyes
Islanding operationopt.
Automated transition from islanding to grid-connected mode and backopt.
Time required for transition from grid-connected to islanded mode (in seconds)1 second
Uninterruptible Power Supply (UPS)yes
Operation is also possible without connection to the internetin grid connected and islanding mode
Operation is also possible without connection to control room of higher-level distribution system operator (DSO)in grid connected and islanding mode
Asset control of distributed energy resourcesopt.
Load management defining curtailable loads and priority loadsyes
Automated dispatch control and optimizationopt.
Automated Re-dispatching in response to external orders or unplaned internal eventsopt.
Internal voltage and frequency regulation in islanding modeopt.
Real time active and reactive power controlopt.
Control of power exchange and voltage levels at point of interconnectionopt.
Aggregated ramp rate control at point of interconnectionopt.
Phase balancing between different AC phasesopt.
Black start capabilityopt.
CommentsAll options above can be supported by the modular programmable platform of H-PPC, depending on the user/system requirements

Energy management options

Increase in self consumptionopt.
Increase of self-sufficiencyopt.
Peak Shavingopt.
Charging of electric vehiclesopt.
Energy management of thermal energy assets? (e.g. heat pumps, thermal storage, ...)opt.
Backup poweropt.
Zero feed-inopt.
Ancillary services for public grid (e.g. frequency regulation, reactive power control, …)Yes; such as P(f) (FR), Q(V), AVR, Cos(Phi)
Consideration of weather forecastsopt.
Consideration of energy load predictionsopt.
Consideration of changing energy prices on the energy marketopt.
Use of AI or self-lernings algorithmsopt.
Blockchain based billing and/or pay as you go solutionno
Participation in the energy marketopt.
CommentsAll options above except Blockchain can be supported by the modular programmable platform of H-PPC, depending on the user/system requirements

Price indication

Hardware: One-time acquisition costs for central control unit (without VAT) FROM - TO (approx. retail price in Euro)From 50000 EUR onwards, depending on site size, MW/MWh, N of Controlled Devices, Strategies
Hardware: Monthly maintenance costs for central control unit (without VAT) FROM - TO (approx. retail price in Euro)From 1KEUR/Month; Depending on the SLA (8*5, 24*7, ...), Response Time, Supported Functions
Hardware: Costs for other necessary system components? (e.g. smart meters, switches, …)Few KEUR for various meters; Network Switches are part of the main solution
Software: One-time acquisition costs (without VAT) FROM - TO (approx. retail price in Euro)Included in the Main System price
Software: Monthly maintenance costs (without VAT) FROM - TO (approx. retail price in Euro)Included in the Main System price
Are there renting or leasing options? If so, what are those options?optionally a partner can license SW-only, only on specific, approved Hardware configurations
CommentsPricing assumes an Upfront (System cost) as above, plus a Yearly Fee that is a fraction of the Upfront
Price information availableyes

Best practice project

Information on reference projects availableyes
Best practice project - ongridOn-Grid University & Hospital Campus, with PV, Batteries, Diesel GenSets
Best practice project - offgridOff Grid Oil rig in the desert, with Grid Forming capabilities, and a set of PV, Batteries, Diesel Gensets

Data update

Data updateNov 2019

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