Description: data recorded by substation monitors within the NTVV project

316 secondary substations, and 4 primary substations had monitors installed to record  data. The data are in sub directories Primary_Substations and Secondary_Substations. Within those directories the data for each substation are in separate files named with the substation ID. Substation identifiers are 4 letters for primary substations and 7 digits for secondary substations.

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.

Data formats are described in the readme files in the sub directories Primary_Substations and Secondary_Substations.

Background information on the NTVV project and 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 .