Frequency balancing by power supply units

A method for providing frequency balancing in a power network grid using radio base stations (RBSs) in a radio access network (RAN), the radio base station (RBS) comprising one or more power supply units (PSUs) connected to the power network grid, the method comprising:

• detecting a deviation of a power network grid frequency measured in a power supply unit (PSU) of an RBS, the power network grid frequency being measured upstream of a power factor correction (PFC) unit of the PSU;
• deactivating the PSU of the RBS in response to the detected deviation, to stop the PSU from drawing power from the power network grid;
• determining one or more further PSUs of another RBS to be deactivated based on the detected deviation, the PSU of the RBS being located in a first frequency containment reserve (FCR) zone and the one or more further PSUs located in a second FCR zone, other than the first FCR zone;
• and
• sending a deactivation indication to the determined one or more further PSUs of the another RBS.

A radio base station (RBS) in a radio access network (RAN) for use in frequency balancing in a power network grid, the RBS comprising one or more power supply units (PSUs) connected to the power network grid, the one or more PSUs comprising:

• a processing circuitry;
• and
• a computer program product storing instructions that, when executed by the processing circuitry, causes the one or more PSUs to:
• detect a deviation of a power network grid frequency measured in a PSU of the one or more PSUs of the RBS, the power network grid frequency being measured upstream of a power factor correction (PFC) unit of the PSU;
• deactivate the one or more PSUs of the RBS in response to the detected deviation, to stop the RBS from drawing power from the power network grid;
• determine one or more further PSUs of another RBS to be deactivated based on the detected deviation, the RBS being located in a first frequency containment reserve (FCR) zone and the one or more further PSUs of another RBS being located in a second FCR zone, other than the first FCR zone;
• and
• send a deactivation indication to the determined one or more further PSUs of the another RBS in the second FCR zone.

A power supply unit (PSU) of a radio base station (RBS) for use in frequency balancing in a power network grid of a radio access network (RAN), the PSU being connected to the power network grid, the PSU comprising:

• a processing circuitry;
• and
• a computer program product storing instructions that, when executed by the processing circuitry, causes the PSU to:
• detect a deviation of a power network grid frequency measured in the PSU, the power network grid frequency being measured upstream of a power factor correction (PFC) unit of the PSU;
• deactivate the PSU in response to the detected deviation, to stop the PSU from drawing power from the power network grid;
• determine one or more further power supply units (PSUs) of another RBS to be deactivated based on the detected deviation, the PSU of the RBS being located in a first frequency containment reserve (FCR) zone and the one or more further PSUs of the another RBS being located in a second FCR zone, other than the first FCR zone;
• and
• send a deactivation indication to the determined one or more further PSUs of the another RBS located in the second FCR zone.