Introduction
PAV,E monitoring monitors and controls the power fed in at the point of interconnection. This requirement applies to particularly weak points of interconnection or also to the new NELEV regulation for mixing systems. The regulation requires a rapid curtailment of the components and is usually carried out by the system controller. Within a limit curve, the power must be curtailed in case the agreed feed-in power is exceeded.
The type of monitoring depends on the power class and the connection level of the system. Simplifies the following existing options:
Monitoring based on average values
Permanent active power limitation
PAV, E protective devices (disconnection)
PAV,E active power limit curve (control/disconnection)
A combination of these options is possible. SMA recommends controlling the active power limit curve and not separating system components.
Grid connection level | System power ∑PEmax | PAVE monitoring | |
|---|---|---|---|
Low voltage (LV) | as per TAR 4105 (active power limit curve) | ||
Medium voltage (MV) | ∑PEmax ≤ 270 kW | as per TAR 4105 | |
Medium voltage (MV) | ∑PEmax > 270 kW to | PAV,E / ∑PEMax ≥ 0.54 | as per TAR 4105 |
PAV,E / ∑PEMax < 0.54 | as per FNN notice: PAV, E protective device + PAV, E active power limit curve | ||
Medium voltage (MV) / high voltage (HV) | ∑PEmax > 500 kW | as per FNN notice: PAV, E protective device + PAV, E active power limit curve | |
You can find more information for specific implementation under the following links:
Technical Information "Prioritization of Active Power Setpoints according to VDE-AR-N 4110 or VDE-AR-N 4120 and NELEV/EEAV" at www.SMA-Solar.com.