Zugul Rate this page General impression. I need more information ABB Sales. Especially as disruption to passenger services had to be kept to an absolute minimum. Local transformer rectifiers provide V DC for the train motive power as well as lower voltage supplies for auxiliary services such as signalling, lighting and ventilation. Support for existing ABB installations.
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This functionality is based on advanced and proven algorithms, for instance for fault location, as well as for restoration and network reconfiguration.
Network analysis and visualization for situational awareness Using MicroSCADA X, the operator can monitor the network state and related measurements, and then perform the control actions needed. Versatile process displays, lists and application tools for network tracing, locating components and reporting provide the necessary information for different users.
The entire network can be viewed on detailed geographical maps in raster and vector formats, as well as in a schematic diagram. Zooming, panning and de-cluttering enable a clear overview and allow users to focus on a specific area to obtain detailed information. The functions are at hand via process displays, maps and schematic network views. In geographical views, several map layers can be used to provide the details needed. It reserves the device, and verifies whether the selected object can be operated, before executing the command.
Additionally, interlocking schemes prevent dangerous operations that might otherwise damage primary equipment. Only authorized users can override interlocking and other locked operations. Operational efficiency while keeping the network safe The switch order management function supports planning, simulation, execution and reporting of scheduled maintenance outage operations.
The intelligent algorithms automatically optimize the switching sequence to minimize the number of affected customers. The detailed maintenance and component data in the relational database can be utilized when planning maintenance activities and component replacements. Close Fault location along feeder, in minimum the remote controllable zone where the fault is, must be determined before isolation and restoration can be planned.
DMS can use fault indicators to determine faulted area but can also make fault distance calculation using protection IED information like fault current magnitude A or measured fault reactance ohm. Most accurate fault location estimate is crucial also in later phases when field crews are searching the faulted network line or component.
The isolation and restoration planning function offers support for planning of operations needed after feeder faults. The function detects the possible operations, which can be carried out by remote control. The initial information for the function is the result of the fault location explained above. The fault isolation planning isolates the located fault as soon as possible and at the same time finds switching to restore power to the first part of the feeder. At the next step possible control actions to restore power from neighboring feeders via normally open points are analyzed.
This is often called as back-feed restoration where the maximum amount of customers will be restored from other feeder s before repairing the fault. This analysis is taking into account all technical limitations like loading capacities of cables and voltage drops because of more loaded lines.
In this complicated analysis the centralized intelligence in control center or at the substation gives best results: Works dynamically in any network situation no pre-configuration Can even handle several simultaneous faults in the area Technical constraints can be checked in powerful analysis utilizing network and load models The created optimal switching sequence can then be executed by the operator or even automatically in FDIR using MicroSCADA X SYS Automatic Fault Isolation and Restoration FDIR Isolation and restoration planning can be used to produce the switching sequence for automatic fault isolation and restoration.
The function speed up the service restoration especially in the case of unmanned control center. The administrator of the system have a possibility to set automatic fault isolation and restoration functionality on. If the functionality is not switched on fault isolation and restoration is handled by operator control actions. Depending on settings sequence execution can be totally automatic or an operator confirmation to run the sequence may be required. Close Coordinated management means that DMS can utilize available measurements from many locations along distribution networks and can make optimal control decisions to keep voltages at good level and to minimize losses in the network.
These measurement points include primary and secondary substations, pole-mounted switches and even smart meters providing real voltage in customer premises. The objectives of Volt-VAr control are: Keeping voltages in limits Reducing losses by minimizing reactive power flows Reducing peak power by voltage reduction The voltage reduction conservation voltage reduction, CVR is an own mode in the application.
In that mode separate voltage limit parameters are used. The control variables include capacitor bank status and voltage tap changer or regulator set-point or position. Controllable capacitor banks and transformer tap changers can be selected in settings and are easy to change. The application can run without capable load flow calculation using real voltage measurements via SCADA communication. When good load flow results after load estimation are available so called pseudo-measurements can be defined to use the results from the load flow calculation.
The London Underground LU comprises some miles of track, with 12 lines and stations serving around one billion passenger journeys each year, and its annual demand for power exceeds 1TWh. Local transformer rectifiers provide V DC for the train motive power as well as lower voltage supplies for auxiliary services such as signalling, lighting and ventilation. The DC supply is switched off at night, to allow track maintenance work to be carried out safely while trains are not running, and this typically results in over switching operations each day. It replaces six previous SCADA systems that were either at the end of their working life or were temporary installations. Control of the network is centralised in two replicated command centres main and emergency , with dual application servers interconnected by a high-speed fibre-optic communications link.
Weaving a power control web for the Underground
The London Underground LU power distribution network has a 22kV sub-transmission system with load delivered via an 11kV system to delivery points. Local transformer rectifiers provide V DC V DC in future for the train motive power as well as lower voltage supplies for lighting, lifts, escalators, ticket barriers, communications and control systems and so on. This was a considerable challenge for a network serving some miles of track and stations, each with its own substation, and an annual power requirement of some ,MWhr. Especially as disruption to passenger services had to be kept to an absolute minimum.
MicroSCADA X DMS600
Your cart Learn more about shopping on ABB. In particular, greater visibility of the power system enables any issue to be flagged and identified, so that early action can be taken to prevent it escalating into a fault. I need service or support ABB Service. Please fill in required fields. Please select country from the list below. You must enter a message.
SPIDER sense for the London Underground