Open AccessOptimization model of high-frequency second defense line of generator tripping based on frequency safety constraints
Author(s) -
Lin Hengxian,
Kun Hou,
Lei Chen,
Dao-Cheng Xia,
Yong Min,
Shuang Qin,
Bowen Zhang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/512/1/012108
Subject(s) - tripping , control theory (sociology) , constraint (computer aided design) , transmission line , generator (circuit theory) , limit (mathematics) , line (geometry) , frequency deviation , grid , fault (geology) , computer science , electric power system , automatic frequency control , reliability engineering , power (physics) , engineering , control (management) , electrical engineering , mathematics , telecommunications , circuit breaker , mechanical engineering , mathematical analysis , physics , geometry , quantum mechanics , artificial intelligence , seismology , geology
Once the transmission grid of the external UHVDC transmission system has a blocking fault, it will cause high-frequency problems. The adjustment capacity of the system alone often cannot meet the requirements, and the generators need to be tripped in the second defense line of the grid. However, the current tripping method of the high-frequency second line of defense is not systematic. This paper first proposes a simple and practical frequency safety constraint condition. When the system meets the constraint condition, the maximum frequency deviation under a given power disturbance will remain within the set limit. At the same time, based on this constraint condition, a generator tripping optimization model of the high-frequency second line of defense is proposed. The simulation results prove that the tripping solution obtained by solving the model can make the highest frequency and steady state frequency of the system meet the setting requirements, meanwhile, it can reduce the tripping amount and avoid excessive generator tripping.