BS EN IEC 62934 pdf free download

BS EN IEC 62934 pdf free download.Grid integration of renewable energy generation一Terms and definitions.
3.4.6.2
damping control
active and reactive power control performance of a renewable energy generating unit or plant with converter type interface intended to dampen system oscillations within a specified frequency range
Note 1 to entry: Damping control is also designed as Power System Stabilizer (PSS).
Note 2 to entry: Damping control can be performed by the generating unit control, at plant level through plant controller, or both.
3.4.7
virtual synchronous generator
VSG
virtual synchronous machine
VSM
convertor equipped with a controller whose algorithm simulates the dynamic behaviour of a synchronous machine
Note 1 to entry: The VSM is intended to achieve improved performance over the DQCI/PLL convertors (dq-axis current-injection/Phase Lock Loop) concerning ROCOF, loss of synchronising torque and reference voltage, frequency stability, voltage stability, sub-synchronous oscillations and fault current in-feed.
Note 2 to entry: The new converter control algorithms aimed to provide “synchronous-like” performance, including inertia support, short-circuit power, voltage and frequency control and black-start capabilities, are designed as “grid- forming converters” too. There is no consensus over the exact meaning of these terms and the electrical capabilities assigned to them, except that the converter should provide a voltage behind a reactance, like a SM. In opposition, the “state-of-the-art” DQCI/PLL converters are sometimes designed as “grid-feeding” or “grid-following” converters.
3.4.8
interface protection
electrical protection required to ensure that a generator is disconnected for any event that could impair the integrity or degrade the safety of the network it is connected to
Note 1 to entry: The interface protection shall be insensitive to voltage and frequency variations in the network
within the voltage and frequency settings.
Note 2 to entry: The interface protection can also be realised in a power control device.
3.4.9
anti-islanding protection
protection function or combination of protection functions preventing an unintentional island to be supplied with electrical energy by distributed energy resources
Note 1 to entry: An anti-islanding protection usually includes the detection of system conditions which could lead to an unintentional island.
[SOURCE: IEC 60050-617: 2017, 617-04-19]
3.4.10
dynamic reactive power support
ability of a renewable energy generating unit to deliver quickly additional reactive power during and after an abnormal voltage change, supporting system voltage retention
Note 1 to entry: This performance is referred to as “fast fault current injection”.
Note 2 to entry: Timing and accuracy of dynamic support by fast fault current injection may include several stages during a fault and after its clearance.
Note 3 to entry: Grid codes could define requirements for symmetrical injections (3-phase faults) and unsymmetrical ones (1-phase or 2-phase faults).
3.4.11
post fault active power recovery
process of renewable energy generating unit or power plant to restore its active power from a temporary value during system fault to a stable value after the fault is cleared
3.4.12
black-start capability
recovery capability of a generating unit or power plant from a shutdown without any electrical energy supply external to the power-generating facility
3.5 Terms and definitions for forecasting
3.5.1
power forecasting
active power or electricity output estimate of one or more renewable energy power plants in a specified future time scale
3.5.2
hour-ahead power forecasting
active power or electricity output estimate of one or more renewable energy power plants for the next 1 h to 24 h, with a typical time resolution of 15 mm or 1 h
Note 1 to entry: In some documents the expression Nultrashortterm power forecasting” or “intra-day power forecasting”, is used with a similar meaning.
Note 2 to entry: The expression “6-hour ahead forecasting” or similar can be used.
BS EN IEC 62934 pdf free download.