Setting Export Limitation Parameters - Huawei SmartLogger1000 User Manual

SmartLogger1000
User Manual

7.10.8 Setting Export Limitation Parameters

Network Application
When the PV plant itself generates power for private use only, the loads cannot consume all
the power and countercurrent may feed into the power grid. Therefore, users need to set the
export limitation parameters over the WebUI to prevent countercurrent.
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Figure 7-66 Network diagram (without a circuit breaker)
Issue 12 (2019-01-15)
Scenario without a circuit breaker: The countercurrent feeding into the power grid can be
eliminated by sending a command from the SmartLogger to lower the inverter output
power.
Scenario with a circuit breaker: When the countercurrent feeding into the power grid
cannot be eliminated by sending a command from the SmartLogger to lower the inverter
output power, and the Maximum protection time is exceeded, the SmartLogger drives
the relay to switch off the circuit breaker by controlling the DO port. When the DI port
detects that the circuit breaker is open, the DO port and relay on the SmartLogger will be
switched off, and the SmartLogger will restore to the initial state.
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