Self-load bank for UPS testing by circulating current method

Chu, Ching‐Lung; Chen, Jiann-Fuh

doi:10.1049/ip-epa:19941208

Cited by 24 publications

(11 citation statements)

References 8 publications

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“…The disadvantages of this idea lies in that it is hard to get an accurate current for testing and it will feed the reactive power to grid. In the middle 1990s, Chu.C.L proposed an idea that uses a PWM rectifier which can run in four quadrants to recycle the energy to the grid [2]. However, an uncontrolled rectifier was adopted in this method, so it can only simulate limited load character.…”

Section: Introductionmentioning

confidence: 99%

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

She

Zou

Wang

et al. 2009

2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition

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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.

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Section: Introductionmentioning

confidence: 99%

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

She

Zou

Wang

et al. 2009

2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition

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show abstract

Section: Introductionmentioning

confidence: 99%

“…It's mainly used in burn-in test of AC power supply by now [1][2][3] . In literature [1], the proposed ACEL can only be used in burn-in test of UPS, and the output power is related to the inner structure of the tested UPS and the working status of ACEL. In literature [2], the proposed ACEL can only be used in burn-in test of synchronized UPS, and there occurs some oscillation in both input and output current near the zero crossing of current.…”

Section: Introductionmentioning

confidence: 99%

High Power Energy Feedback AC Electronic Load and its Application in Power System Dynamic Physical Simulation

Zhao¹,

Pan²,

Wang³

2007

2007 IEEE Industry Applications Annual Meeting

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The control methods and strategies of the modern power electronic technology based AC electronic load (ACEL) are studied. For improving its dynamic performance, the reference current is calculated by numerical value method at real time, and its convergence area is given out. It not only can imitate transmission line, electricity loads as well as short circuit experiments under the fixed impedance model, but also can apply in real time digital simulation system under the fixed current model. Simulation and experiment results indicate the effectiveness of control tactics and methods. The experiment prototype can simulate the impedance keep constant and sudden change under the fixed impedance model, and can accurately track outside signal under the fixed current model, simultaneously the energy that absorb by electronics load can feed it back to power system. The application domain of electronics load is widened and it is one of development direction in power system dynamic physical simulation.

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“…(2), (4), (7). Secondly, the electromagnetic torque can be got by Equation (5). Thirdly, the rotor speed n can be obtained by Equation (6).…”

Section: Equivalent Asynchronous Motor Modelmentioning

confidence: 99%

“…So that, the electronic load can replace the real impedance load when the input current of electronic load can be precise controlled and has the same character with real impedance load [3] [4] . Although the electronic load can't take over the classic load yet [5][6] [7] , the theoretical basis of its application in asynchronous motor simulation is adequate. The asynchronous motor electronic load and its concrete model realization are discussed here.…”

Section: Introductionmentioning

confidence: 99%