TRANSIENT OVERVOLTAGE ANALYSIS AND RAPID ESTIMATION OF INTEGRATED ENERGY AC-DC HYBRID TRANSMISSION SYSTEM

Yi Lidong; Bai Shibin; Zhang Wenchao; Tian Zhihao; Liu Shunnan; Liu Gang

doi:10.19912/j.0254-0096.tynxb.2022-0101

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (6) : 122-129. DOI: 10.19912/j.0254-0096.tynxb.2022-0101

TRANSIENT OVERVOLTAGE ANALYSIS AND RAPID ESTIMATION OF INTEGRATED ENERGY AC-DC HYBRID TRANSMISSION SYSTEM

Yi Lidong¹, Bai Shibin¹, Zhang Wenchao², Tian Zhihao¹, Liu Shunnan², Liu Gang¹

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Abstract

Aiming at the problem that the transient overvoltage caused by fault disturbance is difficult to calculate quickly and accurately in the AC-DC transmission terminal system with large capacity DC and high proportion of new energy centralized access, which leads to the safe and stable operation of the system, a method of transient overvoltage analysis and rapid estimation of the integrated energy AC-DC hybrid transmission system is proposed. In this regard, this paper firstly establishes an equivalent model of the sending end system of wind and fire bundling, considering the regulation characteristics of the AC and DC integrated energy after the energy storage system being connected, and corrects the transient overvoltage after the fault. The dynamic change characteristics of active power and reactive power of wind turbines under fault disturbance are analyzed, and the calculation flow of transient overvoltage is given. Then, the time-varying parameter identification method of transient overvoltage is analyzed, and a fast estimation method of transient overvoltage in AC-DC system is proposed. Finally, a simulation model is established based on the data of the AC/DC transmission side system in a certain place. The simulation results verify that the proposed method has superiority in the calculation accuracy and convergence speed of the transient overvoltage of the AC/DC transmission side system.

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integrated energy / AC/DC / transient overvoltage / new energy / fast estimation

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Yi Lidong, Bai Shibin, Zhang Wenchao, Tian Zhihao, Liu Shunnan, Liu Gang. TRANSIENT OVERVOLTAGE ANALYSIS AND RAPID ESTIMATION OF INTEGRATED ENERGY AC-DC HYBRID TRANSMISSION SYSTEM[J]. Acta Energiae Solaris Sinica. 2023, 44(6): 122-129 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0101

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