Recent Advances in Electrical & Electronic Engineering - Volume 15, Issue 6, 2022

Background: Conventionally, a two-stage conversion is required for providing isolated DC output. Objectives: This paper aimed at proposing a converter comprising three ports with isolated output and higher output power and voltage levels, and to study its switching operations. Methods: The converter has two input ports that connect an AC source and the solar PV source. The third port acts as an output port to supply the Read More

Background: Previous works on total harmonic distortion (THD) minimization for multilevel inverters (MLI’s) have made a symmetrical approach that imposes Quarter Wave Symmetry (QWS) and Half Wave Symmetry (HWS) with the aim to restrict the computational difficulties to solve the finalized non-linear expressions. Objective: However, the QWS constraint can be abolished, which leads to more generalized formulation Read More

Background: Most of the proposed interface circuits use bulky inductors to enhance the key performance parameter, i.e., power transfer efficiency. This sets constraints on designing power conditioning circuitry for constrained IoT applications. Objective: To replace the bulky physical inductor with area-optimized components suitable for integrated circuit realization with reduced silicon footprint for constrained applications like Inter Read More

Background: At present, small current grounding systems are widely used in distribution network of China. Affected by the complex topology of the distribution network and other factors, single-phase grounding fault has become the most prone type of electrical short-circuit fault in China. Objective: Considering that the traditional fault selection and location methods are difficult to mine the effective information of fault qua Read More

Background: The digital transformation strategy puts forward higher requirements for the information support system of the power system. Also, it points out the direction for the operation and maintenance of essential equipment such as large power transformers. However, the complex operating environment of power transformers poses a challenge to the digital operation and maintenance of equipment. Objectives: Co Read More

Background: Focusing on the stability problems brought by integrated wind power and fuel cell, the objective of this paper is to analyze small-signal stability and improvement of a hybrid renewable energy system connected with Doubly-Fed Induction Generators (DFIGs) and Solid Oxide Fuel Cells (SOFCs) energy with the Static Series Synchronous Compensator (SSSC) and power-Oscillation Damper (POD). Methods: For this purpose Read More

Background: The operation state evaluation and fault location of the transformer is one of the technical bottlenecks restricting the safe power grid operation. Methods: A hybrid intelligent method based on the Improved Sine Cosine Algorithm and BP neural network (ISCA-BP) is developed to improve the accuracy of transformer fault diagnosis. First, the cloud model is introduced into the Sine Cosine Algorithm (SCA) to determi Read More