The Benefits Of LV Monitoring With Sub.Net Smart LV

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Installing a system for Embedded LV Monitoring presents major positive aspects all through the utility such as elevated asset management, enhanced network capability and enhanced dependability. The number of installations necessary to attain profitable results is a enormous difficulty for monitoring equipment and utilities companies in their continuous drive to improve effectiveness.

With the potential collection of irrelevant info that lead to bottle-necks, which have to be managed, the engineering labour costs can grow. Although the quantities of monitoring equipment needed help drive the costs down, communications, MTFB and robustness remain variables that have to be seriously considered.

The sub.net embedded monitoring system may help to overcome this by decreasing costs due to it being specifically tailored for the LV applications although also remaining flexible by enabling many other features, as required, to be incorporated.

Several U.K utilities are using sub.nets to offer remote monitoring of per phase per feeder real and reactive electrical power and phase voltages of the LV network. Everyday or weekly formatted reports with tabular and graphical measurements are emailed through GPRS or GSM. Along with this report a 2nd report is also sent with the server info as a CSV attachment to a central server. For additional reporting and examination the server info is imported right into a database.

The various installation sites for Power System Monitoring include ground mounted transformers, pole mounted transformers and LV substations.

LV Monitoring presents key positive aspects such as enhanced network capability and enhanced dependability. Enhanced asset management is also a product of lv Monitoring through the usage of sub.net.

LV monitoring with sub.net can be used to provide timely information on the transformer and feeders in an LV substation. This can be used for load balancing, demand optimization and network planning. This will allow utilities to operate their networks more efficiently and reduce costs.

A new input module allows sub.net to be connected directly to a 230/400V three phase supply. Clamp, split core or Rogowski CTs are used to monitor the transformer and feeder currents. The system can be extended to include any number of feeders. Formatted reports including graphs are sent to users via email over a GSM/GPRS network. The information from these reports may also be automatically integrated with other utility systems.

Regular reports include the phase and line voltages, transformer and feeder phase and neutral currents, per phase real, reactive powers, power factor and per feeder metered values. The real time measurements are available as maximum, minimum and average values every 10 minutes for the previous 26 weeks. For an LV substation with 6 feeders there are over 140 parameters available. Additionally sub.net can report on line faults and power quality including voltage dips, frequency, harmonics and flicker.

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