EFR4001IP
12720-0713-00
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22 / 53
www.ziehl.de
7.11
Program 7 (Pav,e-monitoring according to VDE-AR-N 4105
→ Relay K3, zero export /
import added together
→ Relay K1 & K2)
Precondition:
•
Own generating unit, e.g.
photovoltaic, CHP, wind rotor, water turbine, …
•
Relay K1 & K2:
Regulatory requirements from the grid operator for limitation or prevention of energy
flow
accumulated
over all 3 phases.
•
Relay K3:
The maximum feed-in power
Pav,e
specified by the grid operator to be monitored.
Goals:
Relay K1 & K2:
•
Prevent grid-infeed of mixed- or non-self-generated energy.
•
Prevent or limit feed in of energy.
•
If necessary, switch on consumers before the generating unit must be limited or shut down.
Relay K3:
•
Pav,e-monitoring and feed-in limitation according to VDE-AR-N 4105.
•
According to VDE-AR-N 4105, the following constant power quotient applies to Pav,e-monitoring:
𝑃
𝑎𝑣,𝑒
𝑃
𝑖𝑛𝑠𝑡,𝑚𝑎𝑥
= 0,6 = 𝑐𝑜𝑛𝑠𝑡 ⇔ 𝑃
𝑎𝑣,𝑒
= 0,6 ∙ 𝑃
𝑖𝑛𝑠𝑡,𝑚𝑎𝑥
⇔ 𝑃
𝑖𝑛𝑠𝑡,𝑚𝑎𝑥
= 1,67 ∙ 𝑃
𝑎𝑣,𝑒
(This power quotient is freely definable in program 8 when Pav,e and Pinst,max are entered)
•
Frequency rejection
→ Pav,e-monitoring inactive when f < 49,8 Hz or f > 50,2 Hz .
Measurement:
Relay K1 & K2:
•
The EFR4001IP monitors the accumulated flow of energy at the grid connection point
(import (purchase) from or export (delivery) to the public power grid)
Relay K3:
•
The EFR4001IP monitors the accumulated flow of energy at the grid connection point and thus
compliance with the feed-in power Pav,e specified by the grid operator.
Feature:
•
The actual active power P L123 (accumulated) is evaluated at the measurement point.
•
The monitoring function is determined separately for each alarm/relay by setting of the limit values:
Relay K1 & K2:
MAX monitoring: Power Kx off > Power Kx on
MIN monitoring: Power Kx off < Power Kx on
Relay K3:
Pav,e-monitoring:
Relay K3 switches off, when
the measured active power P L123
≤
1,02*Pav,e
(“the 1st switching point S1”) or
the measured active power P L123
≤
1,067*Pav,e (“the 2nd switching point S2”) or
the measured active power P L123
≤
1,69*Pav,e (“the 3rd switching point S3”).
Relay K3 switches on, when
the measured active power P L123
≥
0,98*Pav,e
(“power K3 on”).
With an active frequency rejection, relay K3 is always switched on when f < 49,8 Hz or f > 50,2 Hz
•
Fixed function of relay: alarm = relay off = contact x1-x4 open, contact x1-x2 closed.
•
Storage of shut down (switched off = autoreset on), reset at device or disconnect Us.
•
The three relay outputs (alarms) work independently of each other.
•
Delay-OFF time can be set from 0 s
Switch-off MAX monitoring (relay K1 & K2):
•
If the measured power P L123 rises above the limit
“power Kx off”, the set time “delay off Kx” starts to
count. If the power stays above the power limit for the entire delay time, the relay Kx switches off.
•
Reconnection: If the measured power P L123 falls below the limit
“power Kx on”, the set time “delay
on
Kx” starts to count. If the power limit remains undercut for the entire delay time, the relay Kx
switches on (and after reset only if
“auto Reset Kx” = off).
