同型光热发电机并联聚合对光热发电场振荡稳定性影响

doi:10.19595/j.cnki.1000-6753.tces.201279

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Abstract

In this paper, the impact of concentrating solar power (CSP) generators in parallel connection on oscillation stability of a CSP plant is studied. It is found that the increase of the number of CSP generators in parallel connection may cause the oscillation mode associated with the excitation system of CSP generator to move to the right on the complex plane, which brings the risk of instability. Based on the Routh stability criterion, further analysis confirms and explains the mechanism of this discovery. Firstly, the linearized model of CSP generator is presented, and then the linearized model of CSP plant with N CSP generators in parallel connection is established. Then, the equivalent model of CSP plant is derived with similar transformation under the condition that CSP generators are all the same. Then, the risk of oscillation instability caused by the increase of the number of parallel CSP generators is analyzed. An example shows that with the increase of the number of parallel CSP generators, the oscillation mode associated with the excitation system of the CSP plant moves to the right on the complex plane, resulting in the instability of the CSP plant. Then, the applicability of the equivalent model is discussed when the dynamic of the CSP generator is different. Finally, the theoretical analysis shows that the electromechanical oscillation mode of the CSP generator is not affected by the increase of the number of parallel CSP generators, thus proving and explaining the mechanism of the instability of oscillation mode associated with the excitation system.

Key words： Concentrating solar power (CSP) generator dynamic aggregation oscillation stability of power system CSP plant

Received: 23 September 2020

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TM712

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	Lai Linchen
	Zhou Qiang
	Du Wenjuan
	Wang Yang
	Wang Haifeng

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Lai Linchen,Zhou Qiang,Du Wenjuan等. Impact of Dynamic Aggregation of Same Concentrating Solar Power Generators in Parallel Connection on the Oscillation Stability of a CSP Plant[J]. Transactions of China Electrotechnical Society, 2022, 37(1): 179-191.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.201279 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I1/179

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