1. Paper 5.57
INFORMATION SYSTEM SOLUTION FOR RELIABILITY BASED ANALYSIS AND DEVELOPMENT OF DISTRIBUTION NETWORKS
P. Verho, P. Järventausta, A. Mäkinen, K. Nousiainen
Tampere University of Technology, Finland
M. Pouttu – Koillis-Satakunnan Sähkö Oy, Finland
P. Juuti – ABB, Finland

2. Reliability analysis as part of distribution network planning
Long tradition in Finland (since 1980’s)
Method development (e.g. customer outage cost model)
Integrated to network information system
Used widely e.g. in order to plan the optimal location of remote controlled disconnectors
Growing interest nowadays due to increased importance of Power Quality
Good development possibilities (more data and advanced information technology available)

3. Recent and ongoing development
Voltage dip analysis integrated to the tool
Modelling of dynamic failure rates
Fault data analysis
Modelling of dependency between failure rate and operational circumstances (e.g. component age, environment, over-voltage protection)
Updated outage cost modelling
Comprehensive planning tool

4. Results of reliability analysis
Load point indices
short interruptions 37 / a
outages 12 / a
outage time 412 min / a
voltage dips 140 / a
outage and dip costs 2368 € / a
Costs caused by a line section
customers 341 € / a
utility 51 € / a

5. Operational development
Requirements
Cost parameters
Network development
Operational development
User
Network editor
Parameters
Results
Network performance
load flow & fault current
technical acceptability
reliability
Costs
operation & maintenance
investments
fault and outage costs
Network analysis
Network data
Suunnitelma
Plan

6. Conclusions
Reliability analysis in important part of modern distribution network planning
Recent and ongoing development in Finland includes voltage dips and dynamic failure rates to the reliability analysis