Abstract
The booming electronics itself carries an impact on power quality. Superconducting Magnetic Energy Storage (SMES) is proposed to enhance power quality in three-phase systems under various loads. This paper aimed to compensate the voltage sags under various faults in the grid systems. The SMES is selected as an energy storage unit to improve the capability of voltage sag compensation. Optimized Dual Fuzzy Flow (ODFF) logic controller is designed to prevent the voltage sag time during excessive phase voltage variation. Hence the proposed controller strategy reduces the total harmonic distortion during various fault conditions. To regulate the contribution of active power, the least possible value is improved using ODFF. The depth of voltage sags compensation is achieved by the over modulation and an iterative loop is designed in the control block. While protecting sensitive loads from voltage disturbances, and sags initiated by the power system, the proposed configuration is advantageous for an industrial implementation. It is found that the proposed method can result in more than 50% additional sag support time when compared with the previous methods such as PI and PSO. Utilizing MATLAB Simulink, compensation of sag and minimization of THD is established, and the simulation tests are performed to evaluate the performance of the proposed control method.
Highlights
In industrial distribution systems, the grid voltage disturbances are the most common power quality problems
Harmonics and non-linear loads lead to major power quality issues
The Dynamic Voltage Restorer (DVR) in [2], uniquely compensates on sag, it limits itself for certain percentage and the quality problem is not suppressed completely
Summary
The grid voltage disturbances (voltage sags, swells, flicker, and harmonics) are the most common power quality problems. Sag, being the most frequent voltage disturbance, is typically caused by a fault at the remote bus and is always accompanied by a phase angle jump. The phase jump in the voltage can initiate transient current in the capacitors, transformers, and motors [1]. Harmonics and non-linear loads lead to major power quality issues. The Dynamic Voltage Restorer (DVR) in [2], uniquely compensates on sag, it limits itself for certain percentage and the quality problem is not suppressed completely. The Dynamic Voltage Restorer with other controlling techniques gives positive result on quality enhancement with its advantage of less computational efforts and low cost [3]
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