An Optimal Placement Method of Oscillation Monitoring Devices Considering the Uncertainty of Operation Condition

Sub/supersynchronous oscillation accidents seriously restricts the effective consumption of wind power and threatens the safe and stable operation of power system. Considering the complex operation conditions of the large-scale grid-connected wind power system, it is difficult to completely avoid the occurrence of sub/supersynchronous oscillation during the grid planning and design stage. Therefore, the construction of an economical and reliable real-time monitoring system for sub/supersynchronous oscillation is necessary. It is the primary issue to construct a oscillation monitoring system by clarifying the oscillation observability at each node of the system, considering the influence of probabilistic events such as N-1 contigency and wind speed of the wind farm. In this paper, the oscillation observability of each node in the oscillation monitoring is defined, the uncertainty of system condition is considered by Monte Carlo method and a monitoring device optimal placement method considering the observability of sub/supersynchronous oscillation is proposed. The feasibility and effectiveness of the proposed algorithm are verified by the simulation of ERCOT system in Texas, USA.