Description: data recorded by primary substation monitors within the NTVV project

4 primary substations had monitors installed to record  data. The data for each substation are in separate files named with the substation ID. Primary substation identifiers are 4 letters.

Note:  Although the substation monitors could record up to 5 second granularity, if a new value was the same as the previous value, it would not be recorded.  Though this saves memory, it means that we cannot be sure what is a repeated value, and what is a drop in comms.

Within each data file, data columns are identified in pairs. The first column of each pair is named in line one to identify the substation and the measured parameter as described below.

The values in the first column in each pair are the timestamps in the format dd/mm/yyyy hh:mm:ss. The values in the second column in the pair are the measured parameter.

Column identifiers take the form <substation identifier>~E<monitoring location>~<parameter>~AI .

Measured Parameters (Units) can be:

AMPS = Current (Amps)
kV = Voltage (kV)
MVAR = reactive power (MVAr)
MW = real power (MW)

Background information on the NTVV project and the substation monitoring can be found in http://data.ukedc.rl.ac.uk/simplebrowse/edc/Electricity/NTVV/Reports/SDRC_9.2b_Evidence_Report_Rev_1.0.pdf and at www.thamesvalleyvision.co.uk .