IEC 62934-2021 Gird integration of renewable energy generation – Terms and definitions

IEC 62934-2021 Gird integration of renewable energy generation – Terms and definitions. 3.4 Terms and definitions for control and protection 3.4.1 unit control control determined and executed on individual generating units 3.4.2 plant control control determined by a plant controller and executed by generating units and other controllable equipment in the plant through communication 3.4.3 plant controller set of control functions and software libraries integrated in a single automation system that make it possible to control the overall performance and functionality of a renewable energy power plant as a single generating plant in the point of connection Note 1 to entry: The plant controller coordinates the P-f and the Q-V control at the plant level, adjusting the active and reactive power output in response to the settings received from TSO or DSO and ensuring compliance with the grid code requirements. Note 2 to entry: The plant controller dispatches the settings of individual generating units and of all other devices involved in the performance at the POC, as transformers tap changers, energy storage, capacitor banks or FACTS 3.4.4 active power control of renewable energy power plant 3.4.4.1 constant active power control control to maintain the active power of a renewable energy power plant within a given tolerance around a target value which is lower than the available power 3.4.4.2 delta active power control control to maintain the active power of a renewable energy power plant at a value which is less than the available power by a configured value 3.4.4.3 frequency control automatic active power regulation in response to a measured deviation of system frequency beyond pre-set thresholds, in order to maintain stable system frequency Note 1 to entry: Frequency control comprises several mechanisms, including frequency response (P(f) droop = proportional controller, primary control) and secondary control (integrative controller). 3.4.5 reactive power control of renewable energy power plant 3.4.5.1 Q control control of reactive power delivered (usually at the POC) independently of the active power generated Note 1 to entry: The plant controller coordinates the Q control at the plant level, adjusting the reactive power generated in response to the settings received from TSO or DSO and ensuring compliance with the grid code requirements. 3.4.5.2 power factor control control of reactive power delivered (usually at the POC) proportional to the active power generated Note 1 to entry: The plant controller coordinates the Q control at the plant level, adjusting the reactive...