A Novel Method to Analyze the Reactive Power Characteristic of Doubly Fed Adjustable-Speed Pumped Storage Unit

Wang, Xinzhu; Han, Minxiao; Teshager, Bitew Girmaw

doi:10.1109/powercon.2018.8601686

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…In the paper [14], an accurate electromagnetic transient simulation model for fast start-up of an actual doubly-fed wind turbine in a wind farm in Mengxi, China, under full operating conditions was established. In the paper [15], a method was proposed to analyze the stator-side reactive power characteristics and regulation mechanism of the turbine based on the V-shaped curve. In the literature [16], the impedance characteristics of doubly-fed induction generators were studied for different wind speeds and different powers.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Operating Characteristics of Variable Speed Pumped Storage Motor-Generator

Tao

Sun

et al. 2023

IEEE Access

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Large-scale variable-speed pumped storage motor-generator adopts rotor winding AC excitation technology, which can adapt to the regulation requirements of wide speed range and wide power variation. In order to adapt to the demand of dynamic change of multiple operating conditions of pumped storage motor-generator, combined with the characteristics of bi-directional energy flow of variable speed motor-generator, and considering the complex control strategy due to its two operating modes of power generation and electric power, it is the basis to realize the stable operation of the system to clarify the constraint law affecting the electrical quantity of motor-generator under different operating conditions. In this paper, the mathematical model of variable speed pumped storage motor is established by using the magnetic field positioning vector control technology, and the mathematical model of variable speed pumped storage motor is derived to analyze the operating characteristics of the motor. The model is used to calculate and analyze the electrical quantities during the speed regulation, active power regulation and reactive power regulation of the power motor, and to investigate the changes of electrical quantities such as stator and rotor current, rotor voltage, rotor active power, rotor reactive power and stator power angle during the change of working conditions. The accuracy of the mathematical model was verified by comparison using a 10MW prototype test. It is a necessary theoretical reference for the analysis of variable speed pumped storage motorgenerator operating conditions.INDEX TERMS Pumped storage power plant, variable speed generator motor, operating characteristics, prototype test.

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Section: Introductionmentioning

confidence: 99%

Analysis of Operating Characteristics of Variable Speed Pumped Storage Motor-Generator

Tao

Sun

et al. 2023

IEEE Access

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“…A family of characteristics called the V-curve [20,21] is used for the evaluation of the static stability of an SG (operating in parallel with the grid with a constant frequency f and voltage U). V-curves for four values of the active output power P of a generator are shown in relative values in Figure 2.…”

mentioning

confidence: 99%

Investigation Concerning the Excitation Loss of Synchronous Generators in a Stand-Alone Ship Power Plant

2021

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The protection systems of ship generators enable them to eliminate potential failures that pose a significant threat to the safety of the crew and the use of the ship. However, due to the fact that marine classification societies do not require the protection of generators against the loss of excitation, such protection is only used sporadically. This article presents an LOE (loss of excitation) analysis of ship generators that operate in parallel. This analysis is supported by simulations and experimental research. The test results show that the positions of the operating points of each generator are interrelated, and changes in the excitation of one (damaged) generator cause automatic changes in the excitation, as well as changes in electromagnetic and energy processes, in the second (efficient) generator. An LOE in one generator causes a dangerous increase in armature currents in both generators. The results of this study prove that the lack of LOE protection at lower levels of excitement in one of the generators causes (by activating the required protection) the efficient generator to be switched off first. The main conclusion of this article is that the introduction of the use of security measures against LOE should be obligatory and legally required.

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A Novel Method to Analyze the Reactive Power Characteristic of Doubly Fed Adjustable-Speed Pumped Storage Unit

Cited by 2 publications

References 12 publications

Analysis of Operating Characteristics of Variable Speed Pumped Storage Motor-Generator

Analysis of Operating Characteristics of Variable Speed Pumped Storage Motor-Generator

Investigation Concerning the Excitation Loss of Synchronous Generators in a Stand-Alone Ship Power Plant

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