Proceedings ArticleDOI
Load bank elimination for UPS testing
S. Gupta,V. Rangaswamy,R. Ruth +2 more
- pp 1040-1043
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TLDR
In this paper, a method for load testing AC and DC power supply equipment that minimizes harmonics and allows for control of the utility input power factor is presented, which produces minimal losses in the load banks by recirculating the power back to the equipment input.Abstract:
A method for load testing AC and DC power supply equipment that minimizes harmonics and allows for control of the utility input power factor is presented. This testing method produces minimal losses in the load banks by recirculating the power back to the equipment input. Two types of recirculating load banks are presented: synchronized and nonsynchronized. In synchronized load banks, power flow from the output to the input of the unit is controlled by injecting the series voltage. Circulation of power in a nonsynchronized load is achieved by processing the load power through a utility interactive inverter which is synchronized with the utility. The theory of operation of quadrature voltage injection and the results of the experiments indicating the steady-state as well as the transient performance of the load banks are given. The financial benefits of using a recirculating load bank are analyzed, and the results are presented. >read more
Citations
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Journal ArticleDOI
Uniform Voltage Distribution Control for Series Connected DC–DC Converters
TL;DR: In this article, the authors investigated applications of current-mode, shared-bus commercial-off-the-shelf (COTS) dc-dc converters to power system architectures configured as parallel-input, series-output (PISO) and series-input-, parallel output (SIPO).
Journal ArticleDOI
Static and Dynamic Power System Load Emulation in a Converter-Based Reconfigurable Power Grid Emulator
TL;DR: In this paper, a hardware testbed platform emulating multiple-area power system scenario dynamics has been established aiming at multiple time-scale real-time emulations, where a constant-impedance, constant-current, and constant-power (ZIP) model has been used for static load types, while a three-phase induction motor model was built to represent dynamic load types.
Proceedings ArticleDOI
Uniform Voltage Distribution Control for Paralleled-Input, Series-Output Connected Converters
TL;DR: In this article, the authors extend the application of current-mode, shared-bus converters to power system architectures configured as Parallel-Input, Series-Output (PISO) interconnects.
Journal ArticleDOI
Design and operation of burn-in test system for three-phase uninterruptible power supplies
Shyh-Jier Huang,Fu-Sheng Pai +1 more
TL;DR: A new approach for the burn-in test of three-phase uninterruptible power supplies is proposed that can perform the energy recovery for reducing the test cost, while the current supplied from the utility can be steered to be more sinusoidal.
Journal ArticleDOI
Energy recycling for electrical AC power source burn-in test
Ming-Tsung Tsai,C. Tsai +1 more
TL;DR: This letter presents a feasible method for electrical AC power source burn-in test that consumes a lesser amount of energy than the conventional method and provides extra flexibility for the test load.
References
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Journal ArticleDOI
Transient Stability Improvement Using Thyristor Controlled Quadrature Voltage Injection
TL;DR: In this article, a thyristor controlled quadrature voltage injection transformer is used to improve the transient stability performance of a generator connected, through a transmission circuit, to a power-system.