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PRESenseEnabling the proactive management of Low Voltage Networks

Gaining a deeper insight into the Low Voltage (LV) network has never been more important to Distribution System Operators, as the number of Low Carbon Technologies (LCT) installations increase in the drive towards Net Zero.

As customers become more reliant on the network, developing issues on plant and cable assets or with the network’s operating health must be quickly identified and eliminated before service levels are impacted.

PRESense is an innovative, edge computing enabled LV monitor that provides distributed intelligence and data capture.

Installed at sub-stations and other supply points on the network, PRESense uses intelligent and dynamic trigger mechanisms to capture power flow data. The intelligent trigger mechanisms capture high frequency, high resolution data sets which identify developing problems on the network, along with the location of the faults identified. These features ultimately enable the proactive management of the network.

PRESense also has an in-built processing capability which detects network conditions and adjusts the volume and frequency of data captured. All of which is driven by what is happening on the network. This means of intelligent processing significantly reduces the cost of LV monitoring as the central collection and processing of other data filtering approaches is no longer required.

Once the data is collected, PRESense transforms it into actionable information. Confirming whether the network is operating safely within its capacity, or if further corrective actions, such as network re-enforcement or deployment of flexibility solutions, are needed now or in the future.

OVERVIEW

01 • PRESense • Overview

PRESense LV Monitor

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PRESenseEnabling the proactive management of Low Voltage Networks

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As an edge computing powered low voltage monitor, PRESense has dynamic triggering capability to capture data, the necessary algorithms that power this and an Artificial Intelligence and Machine-Learning decision engine, which allows an individual device to ‘learn’ the normal network conditions in which it is deployed. This enables PRESense to store data capture triggering, data processing and validation rules which powers its extensive anomaly detection capabilities at the very edge of the data estate.

These features ensure that PRESense only communicates the information that relates to the use cases of interest. This approach minimises costs in data transport, storage and management which ensures that users analysing it are not overcome by a surge of data and reduces the latency involved in turning raw data into actionable information.

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01 • PRESense • Overview

OVERVIEW

01 • PRESense • Edge Computing

EDGE COMPUTING

Sensors - PRESense LV Monitor

Edge Computing

Real-time processing

Intelligent triggering

Data filtering

Data optimisation

Communication

Cloud

End user - commercial and residential

Substation

NetworkPRESense

LV Monitor

Edge Computing Gateway

Cloud

How PRESense collects and communicates data

PRESense data processing architecture

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NETWORK HEALTH MONITORING

PRESense captures all key aspects of network health beyond basic voltage and current data. It works to gather power factor, multiple power calculations, phase imbalance data, system frequency, Total Harmonic Distortion (THD), and measurement of individual harmonics.

The advanced data capture helps identify developing load issues, such as potential overload caused by increasing numbers of electric vehicles, issues caused by distributed generation (solar panel deployment), limited network capacity and phase imbalance.

This enables network operators to plan and undertake the most effective form of remedial action – whether that is network modification, deployment of flexibility products, traditional re-enforcement or replacement of cables and transformers.

PREDICTIVE FAULT LOCATION

CABLE HEALTH INDEXING

PRESense automatically captures data which can be used by Kelvatek’s well-established SELF (Single Ended Location of Faults) algorithms to provide a distance to any network fault or to pre-fault activity. In most instances some activity can be detected in advance of customers noticing an issue with their supply.

Meshed networks have traditionally presented significant problems to conventional fault location methods. These problems will only worsen as dynamic networks become more common. PRESense gathers data which can also be used by Kelvatek’s existing multi-ended and multi-point fault location systems (MELF), supporting the locating of even these most difficult faults.

Taken together, these capabilities can be used to almost eliminate customer interruptions on monitored circuits, along with any associated regulatory penalties. They support cost effective pro-active remedies for any developing network issues.

PRESense’s high resolution, high frequency data capture and edge computing capability enables the onsite utilisation of Kelvatek’s proven analytical techniques. These have been developed and perfected from extensive monitoring of data captured from the field, and in Kelvatek’s unique test facility. They allow PRESense to identify, capture and measure key parameters which are used to detect any fault precursors on the feeder networks being monitored.

PRESense implements advanced triggering mechanisms to capture the data required to support this technique. These various parameters are then processed, weighted and combined with other relevant data in the cloud to create a health index for each cable.

Use of this data will allow network operators to target asset replacement in the most cost effective and efficient manner – allowing deferment of replacement costs until the optimum cost/benefit situation is realised.

02 • Key Capability and Benefits • Predictive Fault Location02 • Key Capability and Benefits • Network Health Monitoring • Cable Health Indexing

Intel l igent Tr iggering

Advanced Data Capture

Mult i -Ended Fault Location

Real-t ime Processing

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PRESense can be deployed quickly without the need for any customer supply interruptions. Mobile apps are provided to support the installation process and facilitate remote reporting. Captured data is made available for diagnosis on a remote server via GSM or optional ethernet communication links.

EnvironmentalIngress protection IP54 to IP65, based on connector

set selected

Operating temperature –25 oC to 60 oC

Operating humidity Up to 95 % Non-Condensing at 20 oC

Mechanical Dimensions 225 x 239 x 87mm (h x w x d)

Weight 1.2kg

Mounting stands Adhesive, magnetic and screw mount brackets are available, as well as floor mounting

Connectors Voltage Multipole connector to clamp, plug

or screw mount connections

Current 5 off sealed/bayonet connectors for safe connection to three-phase current probe set

Ethernet RJ45

Antenna SMA

TECHNICAL SPECIFICATION

03 • Technical Specification 03 • Technical Specification • Contact Details

Measurements Load/Power quality To EN 61000-4-30 Class S in general

Per phase - Voltage - min, max and mean Voltage interruptions Voltage dips Voltage swells Rapid voltage changes Mains signalling voltage Voltage unbalance Current – min, max and mean Current unbalance Frequency-min, max and mean Power factor Real power Reactive power Apparent power Power unbalance Total harmonic distortion (mean V and I) Individual harmonics to 25th (mean V and I) Interharmonics (mean Vand I)

Fault location SELF – Single ended fault location MELF – Multi-ended fault location (operates in conjunction with additional compatible data capture products at different points on the network)

Enhanced diagnostics (Optional upgrades to PRESense and/or remote server diagnostics)

Cable health Fault precursor Fault classification Safety/Fire risk Overload prediction Thermal excursion Potential fault level LCT detection

Measurements

Voltage Range 0 to 625 V a.c.

Accuracy 0.5 %

Current Range 10 kA rms input range

Accuracy 2 %

Standard current probe set Type Rogowski

Sensors 3

Cable Length 3 m

Note: Standard current probe set is supplied with dust/water ingress protection. An optional sealing kit is available which can be retrofitted to the standard lead set – providing IP65 protection for the situations where this level of protection is necessary.

Head Office

KELVATEK

31 Ferguson DriveKnockmore Hill Industrial ParkLisburn BT28 2EXNorthern Ireland

+44 (0)28 9262 6989

support@kelvatek.com

kelvatek.com

CONTACT DETAILS

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Whilst every effort has been made to ensure that the information given is accurate, Kelvatek reserve the right to change any of the details or specifications in this document without prior notice and disclaims liability for any editorial, pictorial or typographical errors.