Voltage Sag/Swell Compensation Using Z-source Inverter DVR based on FUZZY Controller

ABSTRACT:

The power quality necessity is one of the serious issues for power organizations and their clients. The examination of intensity unsettling influence attributes and discovering answer for the power quality issues have brought about an expanded enthusiasm for power quality. The most concerning aggravations influencing the nature of the power in the conveyance framework are voltage list/swell. The DVR is utilized to alleviate the voltage list/swell on touchy load. In this paper Z-source inverter (ZSI) based DVR is proposed to improve the voltage rebuilding property of the framework. The ZSI utilizes a LC impedance lattice to couple control source to inverter circuit and readies the likelihood of voltage buck and lift by shortcircuiting the inverter legs. Furthermore a fluffy rationale control plot for Z-source inverter based DVR is proposed to acquire wanted infusing voltage. Displaying and reproduction of the proposed DVR is actualized in MATLAB/SIMULINK stage.

 

BLOCK DIAGRAM:

Fig. 1 DVR general configuration

 

EXPECTED SIMULATION RESULTS:

Fig.2Three phase voltage at load point during three phase fault without DVR

Fig 3. Three phase voltage by DVR

Fig.4Three phase compensated voltage with DVR

Fig.5comparison of performance of DVR using Z-source inverter during fault condition

Fig.6Three phase voltage at load point during three phase fault with DVR and PI controller

Fig.7Three Phase voltage at load point during three phase fault with DVR and PI and Fuzzy controller

 

CONCLUSION:

DVR fills in as a successful custom power gadget for relieving voltage hang/swell in the dispersion framework. If there should arise an occurrence of outside aggravations the proposed DVR infuses suitable voltage part to powerfully address any deviation in supply voltage so as to keep up adjusted and steady load voltage at ostensible esteem. In this paper Z – source inverter based DVR alongside fluffy controller is displayed and the equivalent is introduced in the conveyance framework to give required load side pay. The reenactment of the DVR alongside the proposed controller is completed utilizing MATLAB/SIMULINK stage. The reenactment results demonstrates that the execution of Z – source inverter based DVR alongside fluffy controller is better contrasted with PI controller.

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