probst VM-301-KJ-GREENLINE, Руководство по эксплуатации

Страница: 64 / 79

17
The possible sources of error are listed below:
▪
Interrupted signal
•
Permissible discharge capacity is less than 20% due to the power reduction.
•
The discharge current or recuperation current is above the allowed set point of the
battery.
•
The temperature is too low. The system must first heat up.
▪
Permanent signal
•
Battery system does not allow discharge current. The setpoint has reached the value 0.
•
A fatal error has occurred (battery additionally switches off the output).
7
PARALLEL OPERATION OF
SYSTEMS /
HOT-SWAPPING
The battery system can be extended to up to 4 systems of the same type in parallel. Here the
systems control each other. If there are differences in the SoC of the respective battery systems,
the system regulates itself independently.
With parallel enhancement, a distinction is made between two options that can be set via the
configuration:
1. Operating time optimization : The entire system is normally operated together, but
should individual systems fail, the remaining functional systems remain active, only the
capacity of the entire system is reduced. However, the permissible currents must not
exceed those of a single system, since in the worst case a system alone must deliver the
required power.
2. Performance optimization : The overall system is always operated together with all
individual systems. As soon as one system has an error and shuts down, the remaining
systems also shut down. The permissible total power is here the addition of the
respective individual powers, taking into account the maximum switching capacity of an
individual system. The permissible values are listed in this document.
The parallel connection offers the following features:
▪
Extension of the system to up to 4 parallel systems
▪
Hotswapping: The individual systems can be connected in parallel even if they have
different charge states.
▪
High failure safety: If individual systems in the network show a fault or have to
disconnect from the network, the remaining, active systems can still be used (in
optimising the operating time).
7.1
HOTSWAPPING OF
SYSTEMS
To extend systems in parallel, the following settings must be made in the overall system:
▪
Setting the number of parallel systems via the CAN interface.
▪
Use the appropriate termination in the communication cabling.
▪
Ensuring that a single system can deliver the required performance. The performance of
the overall system is not increased by a parallel expansion, since each individual system
must deliver full performance in the event of a fault in the other systems.