Power plant controller for generating a power reference to wind turbine generators

A method for generating a setpoint to one or more wind turbine generators connected to an electrical grid via a connection line, wherein the method comprises:

• determining the setpoint on basis of an electrical reference value and a stream of determined electrical grid values, the stream of determined electrical grid values communicated to a reference control system from a grid meter, wherein the grid meter is connected to the connection line at a location which enables measurements of electrical quantities present at the grid, and wherein the electrical grid values are determined based on the electrical quantities present at the grid, wherein the set point comprises at least one of:
• a first setpoint (Qset1, Qset2) relating to a desired amount of reactive power on basis of a voltage and reactive power reference value (Vref, Qref) and a stream of measured voltage and reactive power values (Vm, Qm);
• and
• a second setpoint (Pset1, Pset2) relating to a desired amount of active power on basis of a power and frequency reference value (Pref, fref) and a stream of measured frequency and power values (fm, Pm);
• detecting a communication fault in the communication of the electrical grid values, and
• in response to detecting the communication fault, reconfiguring the reference control system so that the setpoint is determined independently of electrical grid values whose transmission is affected by the communication fault by selecting alternative values.

A computer program product comprising:

• a non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code configured to perform an operation for generating a setpoint to one or more wind turbine generators when the computer-readable program code is executed using one or more computer processors, the one or more wind turbine generators connected to an electrical grid via a connection line, the operation comprising:
• determining the setpoint on basis of an electrical reference value and a stream of determined electrical grid values, the stream of determined electrical grid values communicated to a reference control system from a grid meter, wherein the grid meter is connected to the connection line at a location which enables measurements of electrical quantities present at the grid, and wherein the electrical grid values are determined based on the electrical quantities present at the grid, wherein the set point comprises at least one of:
• a first setpoint (Qset1, Qset2) relating to a desired amount of reactive power on basis of a voltage and reactive power reference value (Vref, Qref) and a stream of measured voltage and reactive power values (Vm, Qm);
• and
• a second setpoint (Pset1, Pset2) relating to a desired amount of active power on basis of a power and frequency reference value (Pref, fref) and a stream of measured frequency and power values (fm, Pm);
• detecting a communication fault in the communication of the electrical grid values, and
• in response to detecting the communication fault, reconfiguring the reference control system so that the setpoint is determined independently of electrical grid values whose transmission is affected by the communication fault by selecting alternative values.