Research on Power Electronic Load: Topology, Modeling, and Control

Abstract

A novel power electronic load (PEL) is introduced in this paper. This equipment can simulate R,L,C load as well as non-linear load. Furthermore, it can recycle the energy back to grid. Topology for single phase AC PEL, three-phase AC PEL, and DC PEL are presented firstly. Based on disadvantages of repetitive controller, an improved repetitive controller is presented to improve the dynamic performance of the system. Relative problems in back to back system are analyzed and mean filter is adopted to eliminate the harmonics in DC loop. The whole efficiency can be as high as 80%-90%. Simulation and experimental results are carried out to validate the effectiveness of the proposed control strategy.

A Low-Cost Programmable High-Frequency AC Electronic Load with Energy Recycling for Battery Module Diagnostics

“…The second part concerns SOC/SOH, which are two critical performance indicators of batteries; many estimation techniques have been proposed in [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] for SOC/SOH. Battery diagnostic techniques can also be combined with chargers, battery analyzers, or monitoring equipment, and suitable diagnostic algorithms and interfaces can be applied according to the type of battery to fully to grasp the electrical characteristics of the battery.Recently it has been recognized that in order to obtain dynamic characteristics for calculating the SOC/SOH of a power battery and to recycle the extracted electrical energy from a tested power battery, a programmable AC electronic load is essential to emulate a variety of dynamic load behaviors, and sequence control is also required [27][28][29][30]. In this paper, a proposed programmable high-frequency AC electronic load is utilized to improve the aforementioned drawbacks and to achieve a dedicated function.…”

“…Recently it has been recognized that in order to obtain dynamic characteristics for calculating the SOC/SOH of a power battery and to recycle the extracted electrical energy from a tested power battery, a programmable AC electronic load is essential to emulate a variety of dynamic load behaviors, and sequence control is also required [27][28][29][30]. In this paper, a proposed programmable high-frequency AC electronic load is utilized to improve the aforementioned drawbacks and to achieve a dedicated function.…”