Dynamic stability reinforcement in remote wind farm connections: POD-SSSC coordination with fuzzy logic control using RTDS.

The Wind Farms (WFs) are located far away from the load centres, with the resultant equivalent reactance being more than near the load. It results in a weak grid due to high power transferred in the transmission lines that affect the low frequency of oscillations, and the system exists with undamped functions. The transmission line has to be compensated to transmit wind power effectively. The Static Synchronous Series Compensator (SSSC) connects WF and the load centre. This work demonstrates a Power Oscillation Damper (POD) to WFs and SSSC for transmission lines and their combination. The eigenvalue of the damping ratio and frequency of oscillations are considered objective functions for particle swarm optimization and formulated based on stability to optimize the controller parameter for improving stability. The coordination between the POD and SSSC has been conducted using a Fuzzy Logic Controller (FLC) to further enhance system performance. The small signal and transient stability examinations use eigenvalue analysis and time-domain simulation. It is analysed by varying the length (km) of the transmission line between the WF and the load centre, along with variation in wind penetration. The study observed that small signal stability damped the oscillatory modes most effectively. It is also revealed that the controller's combination with FLC intensifies the capability under extreme disturbances and detects an improvement in the system's transient stability. The proposed approaches' effectiveness is evaluated on an IEEE-11 bus two-area test system with optimized controller gain parameters and controller coordinated FLC through a Real-Time Digital Simulator. [ABSTRACT FROM AUTHOR]