Indirect Control Algorithm Research Articles

Exact Sinusoidal Signal Tracking on a Modified Topology of Boost and Buck-Boost Converters

This contribution presents new DC–DC Boost and Buck-Boost converter topologies to track sinusoidal signals in an exact form, that is, with zero error tracking. The proposed topology considers two DC–DC converters connected to the same load, which means that the converters are not in a cascade connection. To track the exact sinusoidal reference, the control algorithm is based on the indirect control algorithm and the harmonic balance method. The main contribution is to consider two control inputs that facilitate and permit canceling out the second harmonic generated by the nonlinearity of the model, and as a result there is a single frequency in the output. The result is such that the converters can track sinusoidal signals with exactly zero error. With this, there is a reduction in the potential negative effects on systems and equipment; some numerical results are presented to corroborate the proposal.

Balance Control for the First-order Inverted Pendulum Based on the Advantage Actor-critic Algorithm

In this paper, a control algorithm based on Advantage Actor-Critic for the classical inverted pendulum system has been proposed. To enrich the observed states which are used to control, a CNN feature-based state is proposed. The direct control and the indirect control algorithms are introduced to address different control situations, such as the situation which only physical states like angle, velocity, etc. provided or the situation which only the indirect states provided like images, etc. A comparison experiment between the direct control and the indirect control algorithms based on the Advantage Actor-Critic has been evaluated. Besides, the comparison experiment with the Deep Q-Network algorithm has been performed. The experiment results show that the proposed method achieves comparable performance with the PID control algorithm and better than the Deep Q-Network based algorithm.

A MICC Algorithm for Power Quality Improvement Using PV-DSTATCOM

A modified indirect control algorithm is presented in this paper to improve the operation of photovoltaic fed distributed static compensator. This new algorithm overcomes the limitations of direct current control algorithm under non-ideal supply voltage conditions such asswitching notches in source current after compensation, distortions in the reference source current and poor harmonic elimination. The design and performance testing of the presented system has been carried out in MATLAB/Simulink software. Furthermore, the efficacy and robustness of the presented system are validated through experiment.

A Single-Phase Current-Source Bidirectional Converter for V2G Applications

In this paper, a single-phase current-source bidirectional converter topology for V2G applications is proposed. The proposed converter consists of a single-phase current-source rectifier (SCSR) and an auxiliary switching network (ASN). It offers bidirectional power flow between the battery and the grid in the buck or boost mode and expands the output voltage range, so that it can be compatible with different voltage levels. The topology structure and operating principles of the proposed converter are analyzed in detail. An indirect control algorithm is used to realize the charging and discharging of the battery. Finally, the semiconductor losses and system efficiency are analyzed. Simulation and experimental results demonstrate the validity and effectiveness of the proposed topology.