Wind turbine electrical power generating system

A wind turbine comprising:

• a rotor;
• a first generator mechanically coupled to the rotor;
• a second generator mechanically coupled to the rotor;
• and
• an electrical power conversion system including at least a first power converter section and a second power converter section,
• wherein the first power converter section is electrically coupled between a rotor winding of the first generator and a coupling point and wherein a stator winding of the first generator is electrically coupled to the coupling point such that in operation, only a fraction of electrical power generated by the first generator passes through the power conversion system, wherein electrical coupling between the stator winding of the first generator and the coupling point bypasses the power conversion system, and
• wherein the second power converter section is electrically coupled between an electrical power output of the second generator and the coupling point such that in operation, the electrical power provided by the second generator to the coupling point passes through the power conversion system.

A method of providing a wind turbine with an electrical power generating system, comprising:

• providing a first generator of the electrical power generating system;
• mechanically coupling the first generator to a rotor of the wind turbine so as to receive rotational mechanical energy from the rotor;
• providing a second generator of the electrical power generating system;
• mechanically coupling the second generator to the rotor of the wind turbine so as to receive rotational mechanical energy from the rotor;
• electrically coupling a first power converter section of an electrical power conversion system between a rotor winding of the first generator and a coupling point and electrically coupling a stator winding of the first generator to the coupling point such that in operation, only a fraction of electrical power generated by the first generator passes through the power conversion system, wherein electrical coupling between the stator winding of the first generator and the coupling point bypasses the power conversion system;
• and
• electrically coupling a second power converter section of the electrical power conversion system between an electrical power output of the second generator and the coupling point such that in operation, the electrical power provided by the second generator to the coupling point passes through the power conversion system.