Negative Input-Resistance Compensator for a Constant Power Load

Liu, Xinyun; Forsyth, A.J.; Cross, Andrew

doi:10.1109/tie.2007.896474

Cited by 156 publications

(90 citation statements)

References 12 publications

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“…In [71,72], the authors presented an input-resistance compensator to eliminate the instability of INR in a system that has a power electronic brushless DC motor drive with constant power-load characteristics, as shown in Figure 9. The strategy is to feed a portion of the changes in the DC-link voltage into the current control loop to modify the system input impedance in the mid-frequency range and thereby to damp the input filter.…”

Section: Active Dampingmentioning

confidence: 99%

Constant Power Loads (CPL) with Microgrids: Problem Definition, Stability Analysis and Compensation Techniques

et al. 2017

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This paper provides a comprehensive review of the major concepts associated with the µgrid, such as constant power load (CPL), incremental negative resistance or impedance (INR/I) and its dynamic behaviours on the µgrid, and power system distribution (PSD). In general, a µgrid is defined as a cluster of different types of electrical loads and renewable energy sources (distributed generations) under a unified controller within a certain local area. It is considered a perfect solution to integrate renewable energy sources with loads as well as with a traditional grid. In addition, it can operate with a conventional grid, for example, by energy sourcing or a controllable load, or it can operate alone as an islanding mode to feed required electric energy to a grid. Hence, one of the important issues regarding the µgrid is the constant power load that results from the tightly designed control when it is applied to power electronic converters. The effect of CPL is incremental negative resistance that impacts the power quality of a power system and makes it at negative damping. Also, in this paper, a comprehensive study on major control and compensation techniques for µgrid has been included to face the instability effects of constant power loads. Finally, the merits and limitations of the compensation techniques are discussed.

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Section: Active Dampingmentioning

confidence: 99%

Constant Power Loads (CPL) with Microgrids: Problem Definition, Stability Analysis and Compensation Techniques

et al. 2017

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“…Comparing Fig. 5 (3) and (4), 2 k can increase appropriately and the dynamic response gets faster on the premise of smooth transition when the current rate of change control method is used. This is because the current change is limited by the limiting link to solve the problem of grid turbulence in the early dynamic response process, and what's more, a larger 2 k helps the current keep a fast regulating speed in the late dynamic response process to ensure the rapidity of the grid.…”

Section: Simulation Resultsmentioning

confidence: 97%

“…Negative impedance compensation method is also proposed as a new method [2]. This method transfers the negative impedance into positive impedance through sampling the voltage signal behind the filter, which is connected to the closed loop control system by the compensator to compensate current.…”

Section: Introductionmentioning

confidence: 99%

The Control Method on Current Rate of Change under Constant Power Load in Aviation Power Grid

Zhang¹,

Zhou²

2015

Proceedings of the 4th International Conference on Information Technology and Management Innovation

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Keywords: Constant power load, The control method on current rate of change, Stability Abstract. Closed-loop controlled electrical drive systems require constant speed without interference, which corresponds to CPLs and performs negative impedance characteristics, so that they have great influence on the stability of aviation power grid. The main purpose of this paper is to solve this problem by adopting the control method on current rate of change which makes it possible to realize the requirements of stability on aviation power grid. In addition, the paper proved the correct and efficiency of this method by using simulation.

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“…The parallel operation, along with power sharing capability of multiple generators, has been investigated to reduce generators size [4]. Nevertheless, the presence of power converters, often acting as constant power loads, introduces stability problem in the envisaged future EPDS [5], [6].…”

Section: Introductionmentioning

confidence: 99%

A Quadruple Active Bridge Converter for the Storage Integration on the More Electric Aircraft

Buticchi

Costa

Barater

et al. 2018

IEEE Trans. Power Electron.

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Abstract-The More Electric Aircraft concepts aims at increasing the penetration of electric systems on the aircrafts. In this framework, the electrical power distribution system (EPDS) is of high importance. In order to improve the utilization of the generators and face the peak power demand without disconnecting the loads, different technologies of storage are employed. This paper proposes the use of a Quadruple Active Bridge converter, already employed in other fields, to interface a fuel cell, a battery and a supercapacitor bank to the DC bus of the EPDS. This objective can be achieved by employing multiple DC/DC converters, that allow an individual control of the energy sources and a good efficiency. Obtaining the same power control and efficiency with a multi-port power converter constitutes a challenge which is worth taking to reduce cost, volume and weight and increase the system reliability. A novel control based on PI controllers in conjunction with a decoupling system and current feed-forward allow shaping the power request to each port. This, however, leads to an asymmetrical loading of each port, which could decrease the efficiency. A laboratory prototype is used to confirm that this asymmetrical kind of operation, where each port processes a different amount of power, does not imply a marked reduction of efficiency.

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Negative Input-Resistance Compensator for a Constant Power Load

Cited by 156 publications

References 12 publications

Constant Power Loads (CPL) with Microgrids: Problem Definition, Stability Analysis and Compensation Techniques

Constant Power Loads (CPL) with Microgrids: Problem Definition, Stability Analysis and Compensation Techniques

The Control Method on Current Rate of Change under Constant Power Load in Aviation Power Grid

A Quadruple Active Bridge Converter for the Storage Integration on the More Electric Aircraft

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