Study and Stability Analysis of Leading Phase Operation of a Large Synchronous Generator

Lv, Yongfeng; Du, Yizhi; Liu, Qi; Hou, Shiqiang; Zhang, Jie

doi:10.3390/en12061047

Cited by 3 publications

(4 citation statements)

References 18 publications

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“…The higher the running exposure rate, the closer it is to the number of available hours. The equivalent forced shutdown rate is the forced shutdown rate of units after reducing the influence of output [44,45].…”

Section: Plos One Eaf = (The Unit Operating Hours-the Unit Reduced Output Equivalent Shutdown Hours)/the Unit's Statistical Hoursmentioning

confidence: 99%

Evaluation of TPGU using entropy - improved TOPSIS - GRA method in China

2022

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China is still one of the countries dominated by thermal power generation. In order to generate more efficient, stable and clean power, it is necessary to evaluate thermal power generation units (TPGU). Firstly, a comprehensive evaluation index system for TPGU with 20 secondary indicators was established from four aspects: reliability indicators, economic indicators, technical supervision indicators, and major operating indicators. Secondly, the entropy weight method can be used to calculate the weight of each second-level index. Mahalanobis Distance improved Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) method is coupled with the Grey Relational Analysis (GRA), and the comprehensive evaluation values of 5 units (600MW) are respectively 0.4516, 0.5247, 0.3551, 0.5589 and 0.6168 from both vertical and horizontal dimensions. Finally, by comparing and analyzing this method with the above research methods, it is found that the results obtained by this method which re-establishes the coordinate system based on the data set are more accurate. In addition, this method can effectively evaluate the operation of TPGU, which is of great significance for cleaner production while generating electricity. In conclusion, some suggestions on clean production of TPGU are put forward, and the innovation points and limitations of this paper are pointed out.

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Section: Plos One Eaf = (The Unit Operating Hours-the Unit Reduced Output Equivalent Shutdown Hours)/the Unit's Statistical Hoursmentioning

confidence: 99%

Evaluation of TPGU using entropy - improved TOPSIS - GRA method in China

2022

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“…Lagging and leading phase operation are two normal operating modes under high and low field currents [31, 32]. For a generator, the ability to lead phase operation is significant in the safe and economic operation of the grid [16]. As a result, the focus of Section 3 is to introduce the theory of leading phase operation and verify it via mathematical model and numerical simulation.…”

Section: Theory and Properties Of Leading Phase Operation Of Fspsp mentioning

confidence: 99%

“…When the field current decreases, the power factor changes from positive to negative and the reactive power changes from inductive to capacitive [16]. The phasor diagram is applied to illustrate the theory of lagging phase and leading phase operation which is shown in Fig.…”

Section: Theory and Properties Of Leading Phase Operation Of Fspsp mentioning

confidence: 99%

“…Li et al [13] built an integrated hydraulic‐mechanical‐electrical model of PSP and analysed the dynamic characteristics of a PSP in pumping phase modulation. Lv et al [16] built a field‐circuit coupling model to analyse the stability of a synchronous generator in leading phase operation and leading phase depth was tested through experiments. Igbinovia et al [17] built an integrated model with wind plant and synchronous condenser to analysed the impacts when synchronous condenser was applied to a grid with wind plants.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Advantages of variable‐speed pumped storage plants in generating phase‐modulation mode: rapidity and stability

Hu¹,

Deng²,

Chen³

2020

IET Renewable Power Generation

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The increase of renewable energy generation penetration rate exerts a passive impact on the power system. A pumped‐storage plant (PSP) is a proper technology to depress power fluctuation and regulate the frequency of the power system. Variable‐speed PSP (VSPSP) is a relatively novel technology and has unique advantages when participating in power and frequency regulation. This study focuses on the generating phase modulation of VSPSP and fixed‐speed PSP (FSPSP). The integrated hydraulic‐mechanical‐electrical models of FSPSP and VSPSP are built and vector control theory is introduced in the model of VSPSP. Based on these two models, this study analyses operational performance and power response under generating phase‐modulation mode. The results reveal that the power regulation ability of VSPSP is more accurate and rapid. In addition, the operation of VSPSP is not restricted by a stability limit and the range of power regulation is expanded. Eventually, it could be observed that weak coupling between the mechanical and electrical system in VSPSP helps to increase efficiency and prolong life‐span of pumped‐turbine. The results and conclusions obtained from this study help to mitigate power fluctuation and improve strategies of power regulation of hybrid power systems with PSP.

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Leading Phase Operation Strategy of Multi-generators Based on Equivalent Impedance Method

Liu

et al. 2022

Lecture Notes in Electrical Engineering

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Study and Stability Analysis of Leading Phase Operation of a Large Synchronous Generator

Cited by 3 publications

References 18 publications

Evaluation of TPGU using entropy - improved TOPSIS - GRA method in China

Evaluation of TPGU using entropy - improved TOPSIS - GRA method in China

Advantages of variable‐speed pumped storage plants in generating phase‐modulation mode: rapidity and stability

Leading Phase Operation Strategy of Multi-generators Based on Equivalent Impedance Method

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