Scottish and Southern Electricity Networks, Scottish Hydro Electric Power Distribution and Southern Electric Power Distribution
SSEN Future Networks Team
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Low Carbon Generation, Meshed Networks and Fault Current
Assess one of the available solutions for alternative protection method at Primary substation level. Outline the required hardware and software required to install system at a local substation, with a high number of faults. Install and commission the equipment, then monitor for 12-18 months. Provide a report on the ability of the system, including a financial analysis of existing systems versus the new technology. The system is currently deployed at Caputh, has no control over the network, and is actively monitoring the network for fault analysis purposes.
This project will look at the ability of SASensor to protect a primary substation using a digital approach, and provide a financial comparison between this and carrying out a traditional approach. It will investigate the ability of the system to provide better asset management within a substation, and how operational expenditure costs differ in comparison with the traditional relay approach. This project is a continuation of an IFI project (2012_03), and is currently deployed at Caputh, awaiting real faults on the system for the purposes of fault analysis. It is anticipated that by Summer 2015 there shall be enough data collected for analysis.
1. Evaluate SASensor’s ability to perform under a variety of fault conditions (10 system faults).
2. Proof of stability for faults beyond the first pole mounted recloser and proof of clearance for faults close into Primary substation (10 system faults).
3. Identification of fault current on individual feeders when faults occur.
4. SSE Power Distribution to improve understanding of commercial and technical aspects of system deployment (installation, design, commissioning and maintenance) with existing practices.
5. Evaluate the event recorder data to see if proactive maintenance of switchgear can be performed via condition based monitoring.
6. Evaluate system for business roll out.
In response to each objective:
1. Perform post-fault analysis on waveforms captured by the SASensor system on site.
2. As number 1.
3. Post fault analysis on 10 system faults.
4. Note points during the development and installation where improvements could be made and discuss with Locamation. Determine full costs of both systems, and evaluate with pros and cons.
5. Desktop based report on the costs, time and training required.
6. Desktop based report on this new technology versus our existing range of protection systems.