SMA ENERGY STORAGE SOLUTIONS:GRID SERVICES

Industrial-scale energy storage solutions

Industrial-scale energy storage solutions have become mature technology, incorporated into utility scale power plants to serve in many different applications. One major area of application is providing ancillary grid services that provide generation capacity and support grid stability.

FREQUENCY & VOLTAGE CONTROL

Frequency Control ‐ P(f) Frequency is held to a very strict tolerance, therefore, deltas in frequency must be mitigated. Renewable energy can introduce fluctuations in grid frequency. Energy storage, specifically battery storage, is an ideal way to solve this issue due to its nearly instantaneous reaction time to frequency events. Enhanced inverter controls and rapid response times make for a great combination.

Voltage Control ‐ Q(V) Fluctuations in grid voltage, especially at the far ends of distribution feeders, can cause damage to loads and utility equipment. Battery inverters can provide full, four-quadrant support to help maintain voltage levels at points of interconnection by utilizing the volt-var function or a voltage droop.

TRANSMISSION & DISTRIBUTION DEFERRAL

Upgrade Deferral If demand within a distribution network increases to the point that an asset upgrade is required, it can be extremely expensive for the grid operator. Adding energy storage, at a fraction of the cost of the upgrade, can alleviate the stress on the network caused by the demand increase.

Energy arbitrage can be a great tool for grid operators without the need of renewable genera tion being in the network. By charging the energy storage system either at night or during another time when energy rates are low, the grid operators have the ability to discharge later on in the day to meet demand and reduce the need for peaker plants to be utilized.

Asset Life Extension Even if demand growth is not increasing, adding energy storage to an existing distribution network can help extend the life of the assets within the network.

Medium Voltage Storage Solution

BATTERY STRINGS with MASTER-BMS

SUNNY CENTRAL STORAGE MV TRANSFORMER

PLANT CONTROLLER

GRID

DC AC Modbus TCP SMA scope

Grid Disconnection

Loads

Grid Disconnection

20

MW

10

– 3

0 M

W

Limited Grid Capacity

Variable load Demand

-10 to +10 MW

Flexible storage capacity

MV DISCONNECTION

Capacity/Deferral

Battery Charging

BatteryDischarging

Ramp Before

Ramp After

Mismatch between load and generation will be reflected into fluctuation of the grid frequency. Storage is an economically feasible option to offer this service

Medium Voltage Storage Solution

BATTERY STRINGS with MASTER-BMS

SUNNY CENTRAL STORAGE MV TRANSFORMER

MV DISCONNECTION

PLANT CONTROLLER

GRID

Medium Voltage PV Solution

PV MODULE SUNNY CENTRAL MV TRANSFORMER MV DISCONNECTION

DC AC Modbus TCP SMA scope

Grid Disconnection

Loads

Grid Disconnection

Mea

sure

ment

& Co

ntrol

Signa

ls

GRID RESILIENCY

Blackstart Battery inverters with a DC precharge circuit and grid forming features are capable of starting a grid while down and slowly ramp up voltage to successfully startup a medium voltage transformer. This feature can be utilized by an inverter whose intended application may be for something completely different, but with minimal effort and cost.

Uninterruptable Power Supply (UPS)Battery inverters can be utilized in several ways to replicate UPS-like functionality at a fraction of the cost of a similar-sized industrial UPS. Double-conversion, online UPS-like functionality, can be accomplished while also providing ancillary grid services to the grid operator.

Easy integrationAC coupling allows the energy storage systems to be

placed virtually anywhere within a distribution network.

VersatileThe same inverter system can be utilized for a multitude

of different applications.

While in grid-tie mode, the system provides grid services like frequency control and energy shifting of renewable power. During grid outages, the control system establishes a micro grid and continues serving the load.

THE SMA SOLUTIONSUNNY CENTRAL STORAGE

Highest Power Density Battery Inverter» High power density leads to lower specific costs (per watt) » Build large-scale storage plants with less system complexity

Wide Battery Voltage Range » Operating battery DC voltage range from 545 V up to 1,500 V » High compatibility with available battery types and technology

Ready for Global Deployment » Simple, fast installation and commissioning » Worldwide acceptance due to certified global standards » Protection class for harsh environmental conditions

Perfect Fit for MV Solutions » Ready for integration into the SMA Medium Voltage Power Station

FlexibleThe Hybrid Controller is modular by design, allowing for a high degree of flexibility. It is programmed using model based development which makes it easier to simulate and develop control functions.

RobustThe underlying, widely used platform is mature and designed for harsh environments. The control functions are extensively tested in the world class and unique SMA Hybrid Test Center, located in Niestetal, Germany.

UniversalThanks to its extensive control functions and access to a wide library of communication interfaces and IO Modules, the SMA Hybrid Controller is the right choice for your application now and in the future in case of needed application adjustment.

The SMA Hybrid Plant Controller The SMA Hybrid Controller is the core of SMA’s solution for storage applications. It controls both the storage system and photovoltaic system to achieve the needed functionalities for both on-grid and off-grid applications. Moreover it can smoothly coordinate the transition between on-grid and off-grid mode.

The SMA Hybrid Controller is a local power management system with interfaces to asset management and grid management systems. It implements and enables the use cases listed in this brochure, depending on the functional deployment.

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