Distribution Network Voltage Improvement using Dynamic Voltage Restorer with Smooth Super Twisting Sliding Mode Control

Abstract

Sensitive industrial customers need higher Power Quality (PQ). End-users and electrical utilityfirms are both paying more attention to PQ problems as a result of massive financial losses caused by PQproblems to sensitive industrial loads. The most important and frequently recurring PQ problems in asecondary distribution system are voltage sags and swells. A rapid, adaptable, dynamic Custom PowerDevice called the Dynamic Voltage Restorer can be utilized to reduce voltage sags and swells. The controlapproach selected for switching Voltage Source Converters (VSCs) largely determines its performance. Byusing the Sliding Mode Control (SMC) with Smooth Super Twisting Algorithm (SSTA), this researchsuccessfully removes the effects of voltage sags and swells on the VSC of DVR. When SSTA is used inconjunction with conventional SMC, chattering, a downside of SMC, is reduced while keeping otheradvantages including robustness, shorter response times, and insensitivity to changings in the load. Theefficiency of this technique is evaluated using the MATLAB/Simulink SimPower System toolbox. Thesimulation's findings demonstrate that the Smooth Super Twisting Sliding Mode Controller (SSTSMC) forDVR device can identify and compensate the voltage sags/swells in less than 2 milliseconds (ms), which issignificantly less time than the 20 milliseconds allowed limit of SEMI F-47 standard for sensitive loads andthe values of Total Harmonics Distortion (THD) is less than 5%. The comparative study also performedbetween Real Twisting Algorithm (RTA) and proposed technique Smooth Super Twisting Algorithm(SSTA), which shows that performance of proposed SSTSMC is much better than RTA.