NDLI: Modular and scalable interleaved operating AC/DC or DC/DC power converter array for HVDC systems

Content Provider	IEEE Xplore Digital Library
Author	Grass, N. Raum, C. Rehmet, S.
Copyright Year	2014
Description	Author affiliation: Inst. for Power Electron. Syst., Tech. Hochschule, Nuremberg, Germany (Grass, N.; Rehmet, S.) \|\| Grass Power Electron. GmbH, Nuremberg, Germany (Raum, C.)
Abstract	For connecting HV DC grids either to AC grids or to DC sources, power electronic converters (AC/DC and DC/DC topologies) in the power range from a few hundred kilowatts up to the MW range are needed. Typical requirements are: (1) High conversion efficiencies, even on low load conditions (2) High reliability and redundancy, service under system operation (3) Low harmonic grid impact, provision of grid support and grid services (e.g. voltage control, reactive power on demand, fault ride through) (4) Accurate DC voltage control and dynamic power flow control (5) Battery and load protection features The paper will present a multi converter system, using IGBT based converter modules, which can be combined in any number and operate in an interleaved parallel control mode. Due to the phase shift between the partial output currents, the resulting current ripple becomes fairly low and the power quality is sufficient, even with low inductance values of the output chokes. For efficiency optimization it is possible to switch off individual modules during partial load conditions. Then, PWM patterns need to be reconfigured and synchronized under real time conditions. As the converter arrays are controlled by DSP based processing cards synchronous PWM pattern processing has been implemented and proven successfully. Power quality improvement functions (e.g. reactive power, harmonics control / compensation, correction of unsymmetrical grid voltages) have been integrated in the control procedure.
Starting Page	1
Ending Page	5
File Size	2553131
Page Count	5
File Format	PDF
ISBN	9781479931040
DOI	10.1109/INTLEC.2014.6972178
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-28
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Insulated gate bipolar transistors Digital signal processing Pulse width modulation Software Topology Voltage control
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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