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aS45307enPA
aS45307enPA
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4 Different types of substation and the master RTU<br />
4a New intelligent compact substation<br />
4b Dedicated cabinet solution containing new switchgear and “intelligence”<br />
added to existing substation<br />
4c Replacement of existing switchgear in a walk-in substation<br />
4d Master RTU in the primary substation<br />
With Demonstrator<br />
2, the partners<br />
proved that it is<br />
possible to develop<br />
and deliver costefficient<br />
tools for<br />
LV network monitoring.<br />
acquisition) system to support automated<br />
operation. Balancing power supply<br />
and power consumption during island<br />
operation and switching to/from island<br />
operation was performed by an automated<br />
system.<br />
Automated MV failure management minimizes<br />
impact on customers by using new<br />
equipment installed in distribution transformers<br />
(DTs), namely six units in Vrchlabí<br />
equipped with circuit breakers, RTUs<br />
and IEDs (disconnection points). Other “nondisconnection”<br />
DTs are equipped with<br />
load-break switches, RTUs and fault current<br />
indicators on MV outgoing feeders.<br />
MV-level automation required implementation<br />
of communication routes and logic<br />
in the local SCADA. In total, 27 newly<br />
reconstructed DTs were equipped with<br />
components to enable Demonstration 5<br />
functionalities.<br />
The implemented functionality results in<br />
the smallest possible number of customers<br />
being impacted by failures. Ideally, the<br />
new functionality will eliminate power outages<br />
completely and significantly reduce<br />
the time needed for fault localization and<br />
isolation. The reduction in time required<br />
for fault localization and isolation, according<br />
to simulation tests based on 18 months<br />
of fault data, amounted to 85 percent.<br />
Islanding functionality was selected as<br />
a solution for areas prone to failures<br />
because of climatic or geographical<br />
conditions. Islanding was tested at the<br />
10 kV level and, after network unification,<br />
also on the 35 kV MV network in<br />
the urban area of Vrchlabí. The power<br />
supply during island operation was provided<br />
by a CHP (combined heat and<br />
power) unit of 1.56 MW capacity installed<br />
within the island area. The aim of<br />
island operation was to test the capability<br />
of a predefined network to disconnect<br />
from the surrounding MV grid in the<br />
76 ABB <strong>review</strong> 4|16
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