Abstract
With the increasing occurrence of extreme weather events, the short circuit and line-breaking faults in transmission lines caused by line galloping have been threatening the security operation of power systems. These faults are also hard to be simulated with current simulation tools. A numerical simulation approach of power systems is presented to simulate the clustered, cascading faults of long-timescale caused by line-galloping events. A simulation framework is constructed in which large numbers of fault scenarios are simulated to reflect the randomness of line galloping. The interaction mechanism between power system operation states and line galloping processes is revealed and simulated by the solution of differences of timescales and parameters. Based on Power System Simulator/Engineering (PSS/E), an extended software package for line galloping simulation is developed with Python, which extends the functionalities of the PSS/E in power system simulation. An example is given to demonstrate the feasibility of the proposed simulation method.
Highlights
Strong wind and storms threaten the stable operation of power systems by damaging power grid equipment, especially transmission lines [1]
The hybrid simulation framework of a power system considering line galloping is constructed to simulate the random clustered, long-timescale cascading faults caused by strong wind weather conditions
An extended software package for Power System Simulator/Engineering (PSS/E) is developed to carry out the hybrid simulation
Summary
Strong wind and storms threaten the stable operation of power systems by damaging power grid equipment, especially transmission lines [1]. Previous works usually ignore wind effects on power system operations when studying the dynamic process of wind affecting a power grid, and only the statistical data of line tripping results can be obtained [13]. In [17] Chen and Zhang construct a numerical simulation platform combining power system and ice accretion dynamic processes, which provides guide methods for future research on line galloping. To reveal the effects of line galloping on a power system dynamic process, a simulation framework considering the effects of line galloping is constructed in this paper.
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