Operation and Control of a Dynamic Voltage Restorer Using Transformer Coupled H-Bridge Converters

ABSTRACT:

The dynamic voltage restorer (DVR) as a methods for arrangement remuneration for relieving the impact of voltage lists has turned out to be built up as a favored methodology for enhancing power quality at delicate load areas. In the mean time, the fell staggered kind of intensity converter topology has additionally turned into a workhorse topology in high power applications. This paper exhibits the nitty gritty structure of a shut circle controller to keep up the heap voltage inside adequate dimensions in a DVR utilizing transformer coupled H bridge converters. The paper presents framework task and controller configuration approaches, checked utilizing PC reproductions, and a research center scale exploratory model.

  

BLOCK DIAGRAM:

(b)

Fig. 1 Interconnection schematic of (a) series and (b) shunt compensation configurations

for power quality improvement.

EXPECTED SIMULATION RESULTS:

Fig.2 Simulation results for balanced sag. From top to bottom traces are grid voltage, positive sequence of grid voltage, negative sequence of grid voltage, injected voltage, and load voltage.

Fig 3. Simulation results for unbalanced sag. From top to bottom traces are grid voltage, positive sequence of grid voltage, negative sequence of grid voltage, injected voltage, and load voltage.

 

CONCLUSION:

This paper has exhibited the acknowledgment and control highlights of a DVR utilizing an air conditioner stacked staggered converter with fell H bridge converters. The power circuit engineering has been talked about pursued by a model advancement prompting the controller plan. The framework is displayed in the synchronous reference outline representing positive and negative succession voltage hangs to be alleviated. The multi-circle controller with complex state criticism decoupling is structured with an inward current circle and external voltage circle. The controller highlights strong structure edges, incredible yield impedance, and line direction as outlined utilizing recurrence reaction predications. Point by point numerical reproduction has been completed to check the power circuit activity and control plot. A research facility scale test model was produced that checks the power circuit task and controller execution. Test results demonstrate superb concurrence with advanced reenactments.