Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modular Multilevel Converter with Sensorless Diode-Clamped Balancing
  through Level-Adjusted Phase-Shifted Modulation   Cascaded H-bridge and modular multilevel converters (MMC) are on the rise
with emerging applications in renewable energy generation, energy storage, and
electric motor drives. However, their well-known advantages come at the price
of complicated balancing, high-bandwidth isolated monitoring, and numerous
sensors that can prevent MMCs from expanding into highly cost driven markets.
Therefore, an obvious trend in research is developing control and topologies
that depend less on measurements and benefit from simpler control.
Diode-clamped topologies are considered among the more applicable solutions.
The main problem with a diode-clamped topology is that it can only balance the
module voltages of a string in one direction; therefore, it cannot provide a
completely balanced operation. This paper proposes an effective balancing
technique for the diode-clamped topology. The proposed solution exploits the dc
component of the arm current by introducing a symmetrically level-adjusted
phase-shifted modulation scheme, and ensures the balancing current flow is
always in the correct direction. The main advantages of this method are
sensorless operation, no added computation and control effort, and low overall
cost. Analysis and detailed simulations provide insight into the operation of
the system as well as the new balancing technique and the experimental results
confirm the provided discussions.

33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an