New measuring technique for reducing the number of voltage sensors in modular multilevel converters
| Autor: | Josep Balcells, Josep Pou, Salvador Ceballos, Jordi Zaragoza, Ricard Picas |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. TIEG-P - Terrassa Industrial Electronics Group -Power |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Engineering
OBSERVER reduced number of sensors Hardware_PERFORMANCEANDRELIABILITY law.invention Data acquisition Hardware_GENERAL law modular multi-level converter (MMC) Hardware_INTEGRATEDCIRCUITS Electronic engineering Convertidors de corrent elèctric Electrical and Electronic Engineering Signal conditioning SWITCHING-FREQUENCY business.industry Voltage divider Electrical engineering Enginyeria electrònica [Àrees temàtiques de la UPC] Capacitor voltage estimator Converters Modular design Electric current converters Capacitor voltage measurement OPERATION business Voltage drop HVDC SYSTEM Voltage |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| Popis: | 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. Ministerio de Economia y Competitividad de España (ENE2012-36871-C02-00), Unión Europea, Consolider-Ingenio Program (CD2009-00046) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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