500kW Energy Storage Inverter for Utility-Scale Applications
For 480 VAC class grid connected battery energy storage applications, Dynapower Company offers the patent-pending CPS-500, a 500 kW energy storage inverter from the Compact Power Systems™ (CPS) family of utility grade, bi-directional, true four-quadrant, Digital Signal Processor (DSP) controlled inverter/converters. Dynapower’s flexible and highly modular CPS units optimize the transfer of energy between a DC energy storage system and a 3 phase grid. The CPS-500 provides power conditioning (voltage and frequency support) for intermittent loads and renewable generation. Systems are available in indoor and outdoor configurations.
The CPS-500 integrates system cooling, controls and a full complement of switchgear and protection including an AC circuit breaker, AC contactors, AC & DC fusing, DC load break contactors, a DC manual isolation switch into a single, heavy duty industrial enclosure. This offers end users and energy storage integrators a cost advantage when compared to non-integrated systems that require additional add-on items.
UTILITY SCALE ENERGY STORAGE FOR
- Integrated AC Breaker with Shunt Trip
- Integrated DC Disconnect
- Integrated DC Input Fuses
- Integrated Cooling System
- Black Start
Dynamic Transfer™ — Dynapower’s proprietary patented algorithm monitors the grid stability. Upon detecting a grid disturbance, the system will disconnect from the grid connection and transition to stand-alone mode on the load connection. The transition is seamless to the critical loads and supports full load imbalances.
TWO MODES OF OPERATION
The CPS-500 provides two modes of operation — Grid-Tied (PQ-mode) and Stand-Alone (UF mode). In the Grid-Tied mode, the patent-pending CPS-500 controls the AC output real power (P) and reactive power (Q). In Stand-Alone mode, it controls the AC output voltage (U) and frequency (F). The system can be started in either mode and the transfer between modes is done dynamically. Advanced controls schemes for multi-unit and microgrid applications are available.
Dynapower’s state of the art control and monitoring platform provides operators with both local and remote operation of the system. In the remote operating mode, a communication link provides autonomous operator control via Ethernet, RS232, or RS485. For local control, Dynapower provides an Operator Interface Terminal (OIT) for error set commands and full system display status.
COMPREHENSIVE SYSTEM MONITORING
The patent-pending CPS-500 provides full system status information including AC output real & reactive power, AC output voltage & frequency and DC battery voltage and DC current readings to the remote operator through feedback signals or through the communication link (via an RTU or PLC). It has an on-board monitoring system with error history and grid fault data capture. System operating information is displayed on the OIT in both local and remote modes of operation.
The standard cooling system utilizes both liquid and air-cooling. An internal liquid cooling loop provides cooling to AC epoxy cast inductors and IGBT heat sinks. Air-cooling of the enclosure is accomplished using temperature-controlled exhaust fans with air intake via louvers at the base of each door. Sealed systems incorporating closed loop cooling solutions, including water-to-water and water-to-air options are available.
F COMP: AUTONOMOUS Hz/WATT SUPPORT
A Hz-Watt function that provides immediate and automatic voltage support to the grid.
E COMP: AUTONOMOUS VOLT/VAR SUPPORT
A Volt Var function that provides immediate and automatic frequency support to grid.
AC Over Voltage, AC Under Voltage, AC Under Frequency, AC Over Frequency, AC Overload, Over-tempature, DC Over Voltage, DC Over Current
Anti-islanding with UL compliant trip points
Max DC Current
DC Voltage Ripple
AC Line Voltage
480 VAC 3 Phase, +10%, -12%
AC Line Frequency
60 Hz (57 – 60.5 Hz) Field Settable
Continuous AC Current
601 A RMS
Overload AC Current
901.5 A RMS
Continuous AC Power
Overload AC Power
0 – 1.0 Leading or Lagging
IEEE 1547 Compliant, <5% TDD
-20 to 40°C, De-rated from 45 to 50°C
Integrated Liquid Cooling
UL 3R (Outdoor)
135” x 54” x 96”