2016 **Abstract:** Abstract-This paper presents a new technique for measuring the capacitor voltages in a modular multilevel converter (MMC) 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 pro…

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“…Therefore, it is assumed that ( ) = ( ) . This assumption has already been proven to be sufficient for the MMC for different voltage estimation techniques [12][13][14]. As a result, the switching state signals ( ( )) can be taken directly from the DSP without the need for extra sensors.…”

confidence: 99%

“…Therefore, it is assumed that ( ) = ( ) . This assumption has already been proven to be sufficient for the MMC for different voltage estimation techniques [12][13][14]. As a result, the switching state signals ( ( )) can be taken directly from the DSP without the need for extra sensors.…”

confidence: 99%

“…This paper proposes a new voltage estimation scheme which aims to reduce the number of voltage sensors required in the MMC. The arrangement of sensors used is similar to those presented in previous studies [14,15]. However, the proposed scheme uses only one voltage sensor per arm to achieve the voltage-balancing of the converter.…”

confidence: 99%

“…On the other hand, authors in the same study [27] have proved that the converter can perform well with up to +10% of the nominal arm inductor value. In more recent research [29], the voltage-balancing of a seven-level MMC has been achieved with fewer voltage sensors, where for each arm the minimum number of voltage sensor required is two. Although, this method has made an important achievement in reducing the number of voltage sensors; however an advanced voltagebalancing algorithm has to be applied to the system where activating and deactivating several SMs instantaneously may lead to instability.…”

mentioning

confidence: 99%

“…Although, this method has made an important achievement in reducing the number of voltage sensors; however an advanced voltagebalancing algorithm has to be applied to the system where activating and deactivating several SMs instantaneously may lead to instability. Consequently, voltage-balancing algorithm in that study [29] must provide one measurement per sample. This paper proposes a new voltage estimation method aiming to reduce the number of the voltage sensors in the MMC, where only one voltage sensor per arm is required to ensure voltage-balancing of the converter.…”

mentioning

confidence: 99%