Hybrid converter and wind power generating system

摘要

The present invention discloses a hybrid converter and a wind power generating system, the hybrid converter including a voltage source converter, a line commutated converter and a line commutated converter, a positive DC terminal of the voltage source converter is connected to a negative DC terminal of the line commutated converter, a positive DC terminal of the line commutated converter is connected to a positive DC transmission line, a negative DC terminal of the voltage source converter is connected to a positive DC terminal of the line commutated converter, and a negative DC terminal of the line commutated converter is connected to a negative DC transmission line. The present invention features a self-commutating capability, can be directly connected to a wind farm to convert wind power to DC power, and is able to improve rated voltage and rated power of the hybrid converter, technology of each component thereof is mature, and system reliability thereof is high.

主权项

1. A hybrid converter, comprising a voltage source converter (2), a first line commutated converter (3a), and a second line commutated converter (3b), wherein:
a positive DC terminal of said voltage source converter (2) is connected to a negative DC terminal of said first line commutated converter (3a), a positive DC terminal of said first line commutated converter is connected to a positive DC transmission line (8), a negative DC terminal of said voltage source converter (2) is connected to a positive DC terminal of said second line commutated converter (3b), and a negative DC terminal of said second line commutated converter (3b) is connected to a negative DC transmission line (9); and an AC terminal of said voltage source converter (2), an AC terminal of said first line commutated converter (3a), and an AC terminal of said second line commutated converter (3b) are connected to a common AC bus (14).