PureWave® SMS Storage Management System

Grid interface for energy storage systems

Storage management and power conversion platform for renewable integration, energy time-shifting, capacity firming and ancillary services. Documentation and support available from RE&D, and available to build to order.

Converts ac power to dc to charge the battery and controls discharge into the electrical system
Eight selectable modes including islanding, peak shaving, frequency regulation and power smoothing
Automatic islanding on utility over/under-voltage or over/under-frequency events
Can provide leading or lagging vars
Controlled locally through an HMI computer or remotely through a SCADA interface
Supplied in a container with separate inverter room and control room

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Overview

The PureWave SMS is a fast-response power controller that converts ac power to dc to charge an energy storage system and controls the discharge of the battery into the electrical system. This lets a wide variety of applications be powered by stored energy when primary power from the utility is not available.

The PCS and batteries are connected in parallel to the distribution feeder through a three-phase transformer. Batteries can be charged during off-peak times and discharged during peak demand, and the system can supply leading or lagging vars. On a utility disturbance it can automatically open the islanding breaker and re-energize the load in voltage-source mode.

Specifications

Operating modes

Modes: Islanding, Direct Power Control, Frequency Regulation, Power Smoothing, Power Scheduling, Peak Shaving, Vac Regulation using Vars, Direct Var Control
System states: 8: Program Reset, Inhibit, Trip Offline, Ready, Voltage Source Run, Current Source Run, Open Input Switch, Close Input Switch
Reset types: Manual, Auto, Self
Return to utility after disturbance: Adjustable time delay, 5 minutes default

Control & communications

Local interface: HMI industrial PC (Linux operating system) on master control rack
Remote control: SCADA interface (DNP points)
HMI access levels: Level 1 observe, Level 2 control
Remote HMI connection: Electronic certificates only
Local/Remote switch: Switches control between SCADA and HMI
Emergency stop: INVERTER STOP button, typically at each container man door

Configuration

Enclosure: Container with inverter room and control room
PCS enclosure sections: Ac section, left and right inverter bays, left and right dc bays
Inverter bay contents: Three-phase dc-ac inverter, dc-dc converter (chopper), ac filter inductor
Dc bay contents: Two dc circuit breakers and dc interface control panel
Utility connection: Through a three-phase transformer
Cooling: Fans on ac and dc bays; blower with variable frequency drives on inverter bays

Standards

Grid protection settings: Over/under-voltage and over/under-frequency alarms used to comply with IEEE 1547; default settings according to IEEE 1547