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Distribution Network Planning

Distribution Network Planning. Daniel Desrosiers, P. Eng Engineering Consulting Services. What is Planning?. Planning (also called forethought ) is the process of thinking about and organizing the activities required to achieve a desired goal .

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Distribution Network Planning

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  1. Distribution Network Planning Daniel Desrosiers, P. Eng Engineering Consulting Services

  2. Whatis Planning? • Planning (also called forethought) is the process of thinking about and organizing the activities required to achieve a desired goal. • Planning involves the creation and maintenance of a plan. As such, planning is a fundamental property of intelligent behavior. This thought process is essential to the creation and refinement of a plan, or integration of it with other plans; that is, it combines forecasting of developments with the preparation of scenarios of how to react to them. From Wikipedia, the free encyclopedia

  3. Network Planning Goals • Reach all consumers wanting to be connected. • Meet their demand. • Provide satisfactory power supply reliability. • Provide power supply quality.

  4. Planning and Forecast • An important, albeit often ignored aspect of planning, is the relationship it holds with forecasting. Forecasting can be described as predicting what the future will look like, whereas planning predicts what the future should look like.[1] The counterpart to planning is spontaneous order. From Wikipedia, the free encyclopedia

  5. Planning Overview The evolution of a distribution power system comprises a number of stages of development Although capacity, security and quality/efficiency of supply are of concern throughout the development of a system, the focus shifts over time. In the early stages of rapid load growth or reconstruction, the priority is to build sufficient capacity to meet the load demands. Following establishment of the network and loads, security of supply becomes a critical factor. Once the system has matured, the focus is on optimization in terms of supply quality and efficiency.

  6. The Environment Strategic Planning City/Town Planning Subtransmission Network Load Forecasting Generation Capacity Distribution Network Planning Customer Connections Renewable and alternative energy solutions Join working with other utilities Protection, Reliability and Quality of supply Assets management and Capital/resources Planning Network Operations & System design

  7. High Level Planning Process

  8. Network Analysis Part Introduce new loads, Apply Load growth Identify and validate solutions Start No Get Reference network YEAR n All ok? Run Simulations Obtain New Yearly Network Model Yes Yearly T&D Scheduled Projects and Improvements for YEAR n+1 Network becomes the Reference network for year n+1 Update future yearly projects list Increment YEAR counter >Last Year Review and optimize projects plan No Yes TheEnd

  9. Finding Solutions Network Solutions Risk Assessment Technical and financial Identify and validate solutions Compare Solutions Non-Network Solutions Preliminary $ Estimate Recommendation Update Projects list

  10. Why use modern power system tools? • Although most network planning related calculations could be done by hand, doing so will limit the number of studied solutions • Using modern power system analysis tools makes it easy to create multiple project scenarios thus increasing planning quality • Single data entry + Automation of data integration from multiple sources • Territory or sub network approach allowing quick check of the entire network performance

  11. Modern Power System Software is to planning what spreadsheet software was to accounting in the 80’ • A wise man at Cooper/Cyme

  12. Power System Analysis Tools • What should we look for : • It should be flexible allowing variable focus for the studies • It should allow easy integration of forecast • Provide on demand recalculation • Answer questions, support decisions • Complete: take into consideration all the environment and integrate various data sources

  13. Keeping up with the network!

  14. Environment – Network Connection

  15. Study case 1: PF correction Problem: Reducing losses associated with poor PF at feeder level. Analysis used: Optimal capacitor placement

  16. Study case 2: VAR optimization Problem: Good PF at peak but needed better management off-peak. Analysis used: Volt Vars optimization (VVO) Peak 1 2 3

  17. Study Case 3: Voltage Optimization • Problem: Initial voltage profile showing little margin for optimization (see below)

  18. Study Case 3: Voltage Optimization • We applied various mitigation solutions: phase balancing, cap banks and voltage regulators relocation and addition. Results after corrections:

  19. Study Case 3: Voltage Optimization • We looked at the global picture for potential: 1 Margin 2

  20. Study Case 3: Voltage Optimization • How does the margin translates in $$$?

  21. Study Case 3: Voltage Optimization • How does the margin translates in $$$?

  22. Remember:

  23. Questions? ...I know they have some!

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