Return to Welcome Page Rating your Community's Electrical Grid
draft no 2 July 2008

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 This is a draft guide to how you can rate how sustainably your community can uses its electrical potential. The focus is on rating how your community is benefiting from the confluence of 230 volt systems, "smart" dwelling appliance and monitoring technology, broadband, the Internet and, dwelling generation of needs  eg photovoltaics, wind power, solar based heating etc.

Useful Terms

Community grid – This is the local (city or borough) reticulation network. In New Zealand the owner was traditionally the local community. Since the Electricity Reforms of 1993 the owners are now often large overseas-based bank corporations. It is now illegal for communities to own both their local wiring network and its intelligence. The common name for its intelligence is now it "retailer" division, which reflects the commodified state of New Zealand citizens now.

Central grid – This is the main national reticulation network. In New Zealand the grid is operated by a corporation called TransPower. It is nominally a State Owned Enterprise (SOE) but Wachovia Bank owns the South Island grid and thus effectively controls much of the national policy of how New Zealanders use their electrical potential.

Peak load. The amount of electrical product being transferred over grids varies with the time of day, the weather and the general needs of consumers at any moment. The “Peak load”  or spike in demand occurs when the amount of product has to be generated and transmitted is at its maximum because consumption is high.

Ripple control system. A small signal of a certain frequency can be sent over the HV (high voltage) and MV (medium voltage) networks that turns special switches on and off in dwellings and streets.

Low Amp dwellings. These are dwelling grids that can only transmit relatively small electrical loads. For instance they have only 5 amp fuses that are typically used for lighting circuits. This puts low limits on the amount of electrical product they can use at any time. This reduces to demand they can make on the community grid. 

Bulk-gen electricity. Electrical resources generated using very large machinery or plant. Typically the plant have the capacity to generate hundreds of megawatts of the resource.

Civil Protection. Another name for this is Civil Defence. It refers to strategies and resources created to reduce the destructive impacts on societies of war and other disasters such as earthquakes, hurricanes, floods, firestorms, snow and/or ice storms etc.

 

The rating is on a continuum:

 Intelligent .....................................Incoherent.

It employs six categories varying from high intelligent meter/grid to high incoherent meter grid. Meters and grids may exhibit the characteristics of more than one category. Pictorial versions of them will be added to this page.

 

Category 1: High intelligent meter/grid

  • All dwellings are encouraged to make a contribution to their community grid i.e. citizen receives more for exporting electrical products to the grid than what they pay to import electrical products from it.
  • Charges on low amp systems reflect the true grid costs i.e. dwellings that that do not import much product at “peak load times” pay only for the electrical generation and transmission capacity that they demand. 
  • Broadband throughout grid system within dwelling and occupant can select from wide range of information and entertainment sources.
  • Dwelling occupant owns all the data of how and when their electrical appliances work and the comfort level statistics of the dwelling. The occupant has complete control over the broadcast of this information.
  • Detailed consumption history of dwelling freely available.
  • Local grid management and dwelling occupant can maintain seamless two-way conversation using broadband (wireless or grid wiring).
  • System primarily driven by democratic, energy efficiency and Civil Protection imperatives.

 Category 2: Moderate intelligent meter/grid.

  • Dwelling can make contribution to the grid with minimal impediment and no net profit from exchange of products.
  • Low amp dwellings pay true grid cost plus 10% subsidy towards maintaining systems to cope with the excess demand created by higher amp dwellings.
  • Dwelling occupant owns all the data of how and when their electrical appliances work and the comfort level statistics of the dwelling. The occupant has partial control over who this information can be broadcast to.
  • Detailed history of occupant’s consumption history freely available from community grid owner.
  • Community grid management and dwelling occupant can maintain seamless two-way conversation using 56 Kbps (wireless or grid wiring).
  • Broadband not available throughout dwelling circuitry but may exist over wireless links between the dwelling and the community grid owner.
  • The performance of “smart” appliances can be monitored at the switchboard by dwelling occupier.
  • System mainly driven by democratic, energy efficiency and Civil Protection imperatives.

Category 3: Low intelligent meter/grid.

  • Dwelling can make a contribution to the grid with minimal impediment and small loss on the exchange of products.
  • Low amp dwellings pay true grid cost plus 30% subsidy towards maintaining systems to cope with the excess demand created by higher amp dwellings.
  • Dwelling occupant share ownership with the community grid owner of all the data of how and when some of their electrical appliances work. The occupant has very limited control over who this information can be broadcast to.
  • Broadband not available throughout grid system within dwelling but exists for one-way communication to community grid owner.
  • Local grid management and dwelling occupant can maintain two-way conversation using the “ripple control” system.
  • System partially driven by democratic, energy efficiency and Civil Protection imperatives.

Category 4: Low incoherent meter/grid.

  • Dwelling can make a contribution to the grid but faces technical impediments and small loss on the exchange of products.
  • Low amp dwellings pay true grid cost plus 50% subsidy towards maintaining systems to cope with the excess demand created by higher amp dwellings.
  • Dwelling occupant share ownership with the Bulk-gen electricity supplier of all the data of how and when some of their electrical appliances work. The occupant has very limited control over who this information can be broadcast to.
  • Broadband not available throughout grid system within dwelling but exists for one-way communication controlled by Bulk-gen electricity supplier.
  • Citizen has token democratic rights in how local electrical potential is used.
  • Minimum or conflicting support for energy efficiency practice.
  • Civil Protection considerations given minimal value.

Category 5: Moderate incoherent meter/grid.

  • Dwelling occupier can make a contribution to the grid and is subject to serious impediments such as double metering and high tax and transaction costs plus exports at a loss because of pricing mechanism.
  • Low amp dwellings pay true grid cost plus over 50% subsidy towards maintaining systems to cope with the excess demand created by higher amp dwellings.
  • Estimation algorithms produce 10-20% average inaccuracy in bills flawed.
  • Bulk-gen electricity supplier effectively owns all the data of how and when some of dwelling electrical appliances work. Some “smart” appliances connected to display computer on dwelling switch board.  The occupant has very limited control over who this information can be broadcast to.
  • Dwelling occupier has no direct vote in how local electrical potential is used. National legislation dictates they can belong to democratic structures that own the community grid or that retail the products transmitted over it but they cannot do both.
  • Short-term profit imperatives prevail.
  • Energy efficiency practice not supported.
  • Civil Protection considerations given token value as part of PR strategy.

Category 6: High incoherent meter/grid.

  • Meter switched off to two-way flow i.e. only flow of Bulk-gen electricity permitted i.e. dwelling occupier can only import product off the community grid from Bulk-gen electricity retailer.
  • Low amp dwellings pay true grid cost plus over 100% subsidy towards maintaining systems to cope with the excess demand created by higher amp dwellings.
  • Dwelling consumption histories not maintained or hard to access. Occupant must measure the consumption of each appliance individually by manual means.
  • Meters inaccurate.
  • Estimation algorithms produce 20% plus average inaccuracy in bills.
  • System driven by short-term profit imperatives of bankers of Bulk-electricity/fossil fuel sector or other narrow sector group. Citizens have no effective vote in how their local electrical potential is used and are deemed tradeable commodities by legislation and thus by the Bulk-gen electricity corporations who own them.
  • System promotes inefficient uses of Bulk-electricity and actively destroys concepts of energy efficiency e.g. associates energy efficiency with deprivation.
  • Civil Protection considerations given zero value or rated as liabilities.

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