October 29th, 2014

New loads on old switches, relays and contactors

While power electronics is continuously superseding the traditional “hardware” solutions in electrical engineering, common mechanical contacts still remain important constituents of any electrical power distribution system. A survey of the types of switches, relays and contactors, their properties and areas of application will be given. Further, a detailed overview shall draw a picture of the impact caused by new electronic types of loads upon these conventional mechanical contacts.

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October 27th

Energy Efficiency Programs and Policies

Author: 
Pierre Langlois
Post date: 
Mon, 10/27/2014 - 20:21

This session is part of the Clean Energy Regulators Initiative Webinar Programme.

Theme 8 - Promotion of Energy Efficiency

Module 3 - Energy Efficiency Programs and Policies

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October 24th

Strategy and Value - Epilogue

I spent many years with the CEGB then National Grid, working in the fields of generation, system operation and the development of models for Generation Economics - Commitment, Scheduling, Dispatch and Ancillary services with the associated representation of Demand, Fuel, Market, Interconnection flows and Transmission security constraints.

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The Smart Customer - Salient Points

1) The change from fixed preset single or two rate daily tariff to ToU has a major impact. Try going in stages via more preset rates (time of day, day of week, season etc).  

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The Smart Enterprise, its Objective and Forecasting

Each AC Power System is always in perfect balance (Kirchoff's law).  The wires have no storage and the product moves through them at the speed of light from every electrical alternator and other generation mechanism through every socket to every demand.

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DER Participation in Operator Timescales

Both the system and distribution operators need to forecast and monitor the transmission and distribution flows in terms of security and stability.  They therefore need a reliable base for predicting demand and generation, both totals for matching and by location for security analysis.  The system operator also needs adequate resources allocated to response and reserve duty.  Both operators wil

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DER Participation in Market Timescales

When it comes to incorporating Distributed Energy Resource (DER) activity, the supplier will need to construct half hour energy blocks with prices, representing the aggregated ‘offers’ from or contracts with his customers to vary premises export and import.  These can then be compared with the sale and purchase half hourly energy blocks and prices being tendered in the Market by other parties. 

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DER Market and Matching

There are a number of commercial and technical mechanisms by which the variable elements of distributed energy resources (DER) can participate in the generation to demand matching process. 

 The timescales for participation are: 

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October 22nd

Global Energy Savings from High Efficiency Distribution Transformers

The International Copper Association is pleased to announce the launch of “PROPHET II: The potential for global energy savings from high-efficiency distribution transformers.” This significant and strategically important report, prepared by Waide Strategic Efficiency Limited and N14 Energy Limited, is an update of the 2006 report of the same title, continuing the story and supplying much new information while retaining the original core material.

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October 21st

Impact of economical cable conductor sizing

The energy losses of cables can be reduced by increasing the cross section of the copper conductor. A study by Egemin Consulting demonstrates that minimizing the Total Cost of Ownership (TCO) of a cable results in a cross section that is larger than that which current technical standards prescribe.

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