A novel protection algorithm for medium voltage collector feeder in wind farm based on quadrature directional algorithm with laboratory investigation

الملخص EN

A protection scheme for medium voltage wind farm collector feeder has been presented in this paper.

The scheme is based on quadrature directional angle.

This scheme is convenient for small WTG with capacity less than 1MVA.

It uses the voltage signal at the collector bus and the current signals at each WTG zone to calculate the quadrature directional angle of each zone which connected to protected feeder, any fault occurs at any parallel feeder or at power grid is considered as an external fault.

A part of Zafarana wind farm which is connected to 220 kV system of the Egyptian network is simulated by using MATLAB package to verify the proposed protection algorithms.

The results covered a wide variety of fault scenarios; these results proved the ability of the proposed algorithm to differentiate between in-zone and out-of-zone faults.

To verify the effectiveness of the proposed scheme it is tested in the laboratory by using induction machine, synchronous generator and DC Motor to simulate the power system, the current and voltage transformer are used to transfer the current and voltage signals respectively of the power system to the data acquisition system connected to pc by sampling frequency of 10 kHz.

Lab- View package is used as software.

The experimental results indicate that they are compatible with the simulated results and the proposed technique is stable, reliable, and fast during the discrimination between internal and external faults.