Geographic information system (GIS) and their role in power utility industry

1
Geographic information system (GIS) and their
role in power utility industry

• M.Sc. Biljana Stojkovska

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Outline

• GIS Geographic Information System
• DLE Distribution Load Estimation
• GIS DLE

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GIS

• Why GIS technology is accepted in many electric
  power utilities?
• Customer data are geographically related
• LV network is widely spread
• Accurate record on MV network and one-line
  diagrams
• Common mapping problems

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The data is usually gathered from various sources

• SCADA
• Corporate Business Database
• Customer Information System
• GIS

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Why Good Estimate on Loads

• The real time information system (good estimate
  on load) is needed for various tasks
• power flow calculations
• network state monitoring,
• removing the constraint violations,
• load forecast of distribution substations,
• switching planning and network topology
  optimization,
• maintenance planning (cutting of annual network
  investments)

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Distribution Load Estimation

• Estimation of load in distribution network
• Some of the customers are metered in real time,
  and some are not
• The problem of delayed load data can be solved by
  the on-line estimation of customers loads

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Why Good Estimate on Loads

• Energy purchase optimization
• To cut the metering costs
• It is unrealistic to measure the load
  (transformer MV/LV).
• Load of the transformers MV/LV is build by the
  load of each customer

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GIS Based Estimation

• It is much easier to utilize GIS for MV network
  in comparison with LV network.
• Keep the records of network disconectors, fusses,
  and the topology of the LV network,
• The development of metering and data transfer
  system in integration with distribution network
• Check the route connection of the customers to
  the transformer

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GIS Based Estimation

• Estimation of MV/LV secondary substations class
  of load curves
• Estimation of load curves with respect to energy
  consumption.
• The energy consumption of the load point consists
  of energy consumption of all customers supplied
  by that transformer.

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Prerequisites for DLE

• To identify representative customer classes or
  load classes (residential, commercial,
  industrial, with/without electrical heating/air
  conditioning, etc)
• To measure load data for each customer class
  throughout the year,
• To have a correct record of the monthly energy
  consumption of each customer
• To have an updated information of supply route
  from transformer MV/LV to each customer.

GIS
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Significance of implementing GIS DLE

• Detailed representation of the input data for
  distribution Load Estimation
• Switch status of LV network
• We can locate the route of supply of each
  customer
• Using customer billing data instead of
  transformer capacities

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GIS plays roles in industry restructuring

• the retailer's view and GIS
• useful management assets tool
• real-estimates of customers loads

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Corporate business database
GIS
GIS ?

• RETAILER

Owner of distribution network
LOCAL DISTRIBUTION COMPANY
Owner of distribution network
OWNER OF DIST. NETWORK
ESCO