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Generalized Short-Circuit Ratio for Operation of Renewable Energy Multi-Infeed Systems Considering Actual Operating Conditions

Liu Chenxi, Xin Huanhai, Xin Huanhai
2023-11-29 ChinaXiv: chinaxiv-202201.00092

With the development of renewable energy, the voltage support strength of multi-infeed renewable energy systems is gradually decreasing, necessitating effective strength assessment methods. If all equipment is assumed to operate at rated operating points, existing power grid strength indicators and …

Small-Signal Stability Analysis of Grid-Connected Equipment in Renewable Energy Power Systems (Part I): Applicability of Physics-Based Models and Stability Criteria

Gongze Xu, Alisher Yarmamat, Xin Huanhai, Wang Wei, Zhang Xin, Chen Dong, Wang Guanzhong, Yang Chaoran, Hu Haitao, Xin Huanhai
2022-05-29 ChinaXiv: chinaxiv-202201.00044

The dynamic characteristics of new energy power systems are complex, featuring numerous stability analysis methods and stability criteria. Different stability methods/criteria correspond to different physical interpretations and applicable scopes, making it currently difficult to theoretically addre…

Small-Signal Stability Analysis of Grid-Connected Equipment in Renewable Energy Power Systems (II): Derivation Mechanism and Stability Classification

Gong Zexu, Alisher Yarmamat, Xin Huanhai, Zhang Xin, Ju Ping, Yuan Xiaoming, Tu Jingzhe, Fu Chuang, Xin Huanhai
2022-05-29 ChinaXiv: chinaxiv-202201.00043

The first part of this paper proposes qualitative principles and quantitative evaluation metrics for assessing the adaptability of stability analysis methods/criteria from three perspectives: stability equivalence, nominality, and robustness. The second part further examines typical equipment includ…

Analysis and Simulation of Dynamic Evolution Mechanism of Exergy in Time-Varying Energy Networks

Chen Haoyong, Haoyong Chen
2022-04-10 ChinaXiv: chinaxiv-202204.00035

Exergy is an indicator for measuring energy quality, which profoundly reveals the essence of work capability loss during energy transfer processes. To investigate the dynamic evolution mechanism of ? in time-varying energy networks, this paper formulates the constitutive relations among physical qua…