АДАПТИВНОЕ ИНТЕГРИРУЮЩЕЕ УСТРОЙСТВО СИНХРОНИЗАЦИИ ДЛЯ СИСТЕМ УПРАВЛЕНИЯ СИЛОВЫМИ ВЕНТИЛЬНЫМИ ПРЕОБРАЗОВАТЕЛЯМИ

M.M. Dudkin; Yu.S. Usynin; K.V. Osintsev

doi:10.14529/power180408

Authors

M.M. Dudkin South Ural State University, Chelyabinsk, Russian Federation
Yu.S. Usynin South Ural State University, Chelyabinsk, Russian Federation
K.V. Osintsev South Ural State University, Chelyabinsk, Russian Federation

DOI:

https://doi.org/10.14529/power180408

Keywords:

synchronizing unit, integrating scanning converter, control system, semiconductor converter

Abstract

The article proposes a new principle for developing a synchronizing unit (SU) based on integrating scan
conversion for circuit driven power semiconductor converters (SC). The SU is a nonlinear pulse system based
on the closed structure of an integrating scanning converter (ISC) operating in the mode of external synchronization with circuit voltage frequency. The block diagrams, the waveform diagram and external synchronization
conditions for ISC by harmonic and bipolar rectangle signals are provided. The selection recommendations
on the frequency ratio of self-oscillations of the scanning converter and circuit voltage frequency were tested.
The paper shows that the adaptive integrating synchronizing unit fully adapts to amplitude instability and circuit
voltage frequency within the range of 50 % and higher. Unlike the existing synchronizing circuits, the proposed SU is a first-order adaptive filter, whose bandwidth is automatically tuned to the amplitude and frequency
of circuit voltage. This property of the integrating SU allows suppressing higher harmonics in the supply circuit
with frequency instability within the range of 50 % and higher. The adaptive integrating SU’s high noise immunity to commutation distortions of circuit voltage is also shown. These results illustrate the practicability of
using it in SC control systems, which receive power from an independent low-power supply system, for example, diesel or wind power generating plants. The paper also provides the recommendations on choosing the parameters of the adaptive integrating SU. A three-phase reverse thyristor rectifier is used as an example of
a crossed synchronization flow-chart as well as the results of its practical application as a part of power SC control systems are provided

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