Battery

Solar Wind

Island Grid

National grid

Island converter

DC/DC chopper

DC-link

Diesel Battery

Solar Wind

Island Grid

National grid

Island converter

DC/DC chopper

DC-link

Diesel

Something common ACS800 island converter produces high quality sinusoidal 3-phase voltage from any DC-voltage source. What is in The converter consists of standard ACS800 hardware and specific islanding software: Single module for low power and module paralleling for high power What is special The software is built on DTC modulation and ISU line converter basic functionality. Instead of synchronization and operation in fixed grid, the island converter rotates 50/60 Hz voltage vector independently and produces independent 3-phase grid similar to 3-phase UPS. For control and converter protection an external measurement board for current and voltage measurement is needed. Output transformer isolates the common mode voltage, decreases conductive emission and enables the 3-phase four wire grid (Dyn).

Features ACS800 island converter produces high quality voltage voltage even with asymmetric and nonlinear load. Main task of the controller is to keep the voltage as sinusoidal and as symmetric as possible. The power quality fullfills the requirements of european standard EN50160. The control has special features of harmonic voltage correction and asymmetry correction. Very fast control response in dynamic load steps keeps the flicker index low. The voltage and frequency can be set by parameters. Converter protection and human protection are on high degree. In addition to standard converter protection, new features are developped to maintain high fault current capability. Due to voltage feedback and active correction; single phase load, nonlinear load, reactive load etc. do not distort nor decrease the island voltage. The source impedance is sort of adaptable. ACS800 island converter can be connected to overriding system via standard fieldbus communication.

ACS800 Island Converter High quality sinusoidal voltage with power electronics

Power quality - power quality according to EN50160 - low voltage distortion - low flicker - low conductive emission with EMC-filter Product info - part of ACS800 md, ACS800-11 and ACS800-17 product series - 400, 500 and 690 V - air cooled, liquid cooled - possible in outdoor cabinet - ISU power range: 10 kVA – 5 MVA - control panel, field bus communication, I/O control Applications and market - Smart Grid distribution station - Island grids in rural areas - Marine applications, vessel grids - Distributed generation: wind, solar and hydro in combination with batteries and together with diesel, unmanned stations - fuel cell applications - UPS applications - Critical industrial processes, reserve aux power with batteries

NOTE! Due to new business and application, the dimensioning and design for each delivery is customized and needs approval from FIDRI.

EMCAny

DC-source

+

-

Control Measurement

2 x I_line2 x U_line

Dyn