%0 Journal Article
%A Picas, Ricard
%A Zaragoza, Jordi
%A Pou, Josep
%A Ceballos, Salvador
%A Balcells, Josep
%T New Measuring Technique for Reducing the Number of Voltage Sensors in Modular Multilevel Converters
%D 2016
* IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ, 08855-4141 USA
%X This paper presents a new technique for measuring
the capacitor voltages in a modular multilevel converter using a
reduced number of voltage sensors.With this technique, the minimum
number of voltage sensors per arm is two. Each sensor measures
the output voltage of a set of submodules (SMs) connected
in series and acquires a new measurement when there is only one
SM activated within the set. The acquired value corresponds to
the capacitor voltage of the activated SM minus the voltage drops
produced in the switches. A simple mathematical model is used
to estimate all the SM capacitor voltages, and it is then updated
whenever there is a newmeasurement available. An algorithm that
enforces the periodic update of the voltage measurements is also
presented. The proposed measuring technique highly reduces the
number of voltage sensors; hence reducing the complexity and
costs of the signal conditioning and data acquisition stages. Simulation
and experimental results are presented to demonstrate the
efficiency of the proposed technique.
%@ 0885-8993
%K Capacitor voltage estimator
%K modular multi-level converter (MMC)
%K reduced number of sensors
%K voltage measurement
doi 10.1109/TPEL.2015.2412658
%U http://hdl.handle.net/11556/240
%~ GOEDOC, SUB GOETTINGEN