By HDK / Published on Fri, 2010-01-15 16:35
This paper describes the performance of the network of a typical future residential concept area, as has been studied in the Intelligent E-Transportation Management project. Several scenarios have been elaborated by load flow simulations. The study investigated what level of introduction of electric vehicles, heat pumps, photovoltaic systems and micro combined heat and power plants is feasible in this network. Possible overload situations are examined and the opportunities of demand side management for the power grid are investigated.
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By HDK / Published on Thu, 2009-10-22 12:26
This talk will present new methods to model and control the aggregated power demand from a population of thermostatically controlled loads. The control objective is to produce relatively short time scale responses (hourly to sub-hourly) for ancillary services such as load following and regulation. The control signal is applied by manipulation of temperature set points.
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By Fernando Nuno / Published on Fri, 2009-10-02 09:49
Session 3: Price Regulation
This session explains different forms of price control, including the classical rate of return organisation and more advanced forms of incentive regulation. It will also explain the design criteria for different price control models.
• Major price control models: Rate of return / Cap regulation / Yardstick competition / Sliding scale regulation
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By HDK / Published on Tue, 2009-08-25 14:29
ISO New England, which oversees New England’s bulk electric power system and wholesale electricity markets, recently established a Forward Capacity Market (FCM) that will pay suppliers to ensure sufficient capacity is available to meet future peak loads. Under the FCM, ISO New England projects the needs of the power system three years in advance and then holds an annual auction to purchase the resources necessary to satisfy the future regional requirements. This market is unique in that it allows energy efficiency and other demand resources to compete directly with generators.
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By HDK / Published on Tue, 2009-06-09 10:25
Following an earlier prediction market, asking your opinion on the level to which electricity bills will be reduced as a result of demand side response (DSR), hereby a follow-up question regarding the level to which consumers will allow grid operators to apply DSR.
You can discuss this question and vote on Leonardo Visions.
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By HDK / Published on Mon, 2009-05-25 15:54
The delivery of electricity to consumers is influenced by demand and supply factors. Using DSR influences the customer’s behavior by offering the customer the choice to buy electricity now, to refrain from buying, buy less/more, or to buy at some other time. This may result in the same supply capacity and overall reliability for less capital and a reduction of the greenhouse gasses, due to efficient use of the production capacity.
How much do you expect DSR would reduce electricity bills?
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By Hans De Keulenaer / Published on Wed, 2008-10-15 13:01
A recent report from IEA explores how variable renewables can be integrated on a large-scale into the electricity system.
The report proposes to replace the term 'intermittency' with 'variability'. Calling renewables intermittent is misleading, since wind or solar power do not drop from full power to zero and vice versa - they are available at some level much of the time, and ramp up or down following gradients dictated by weather.
The main theme of the report is that hosting capacity of the electricity system for variable renewables can be much larger than previously reported, provided that a number of
measures are taken to increase system flexibility. The approach
recognises the problem, but offers solutions.
A number of
strategies are presented to smooth the effect of variability or to
increase flexibility of the electricity system to absorb it.
Smoothing factors:
- system-wide aggregation: aggregating wind or solar power over a wider area reduces variability
- Aggregation of the output of different generation technologies
- Better forecasting
Flexibility sources:
- Fast-response capacity in the generation portfolio
- Availability of storage
- Stronger interconnections of transmission systems
- Demand-side management and response
While there is no intrinsic ceiling to hosting variable renewables,
current networks may be inadequate for large-scale incorporation.
Substantial changes to networks and system operation will be needed.
And whatever the mix of above solutions adopted, there remains large
uncertainty on the cost and reliability of the resulting system.
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By David Chapman / Published on Thu, 2008-06-12 17:03
At any instant, the amount of energy being consumed by users on the electricity grid is exactly matched by the amount of energy being produced. Because of the very large number of consumers, the pattern of demand tends to be quite predictable according to season, day of the week and time of day so that generation needs can be planned many hours ahead. In practice, the forecast is never exact, but it is normally accurate enough that an appropriate combination of generating plants, with some capacity margin, are available to cope with the actual demand.
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By Hans Nilsson / Published on Wed, 2007-06-27 07:00
Energy policies that involve utilities (the old DSM-way) were never totally out, but are coming back strong. ACEEE has them highest on their list in a fresh study for Florida.
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By Bruno De Wachter / Published on Thu, 2007-05-17 07:30
A report by the RISØ National Laboratory, Denmark
The cost of producing electricity varies considerably over relatively short time intervals, yet most electricity consumers do not experience corresponding variations in the price they pay for consuming electricity. But are consumers willing and able to respond to short-term variations in electricity prices and, if so, what is the benefit to society of such a Demand Response by consumers?
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By Bruno De Wachter / Published on Fri, 2007-05-11 07:30
By the Pacific Gas and Electric Company
Demand Side Management (DSM) programs aim at reducing peak demand and improving energy efficiency of electrical consumers. This can serve several goals, but the principal reasons are postponing the need for new generation capacity and reducing GHG emissions (see previous blog post 'DSM is back — globally').
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By Hans Nilsson / Published on Fri, 2007-04-06 07:00
A few years ago when liberalisation of electricity markets gathered speed, many utilities withdrew their interest from DSM and all activities that were related to customers and efficient end-use. In Europe, they are coming back gradually, not least since the energy services directive so requires, but also to some extent since the positive values in marketing (and in ancillary services) have been discovered.
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By David Schmetterer / Published on Mon, 2007-03-26 06:49
It's been said that the cleanest and most effective form of energy production is conservation. Think about it - no new power plants, no dirty extraction or refining, and of course no emissions. But like post-peak oil, new opportunities for conservation can be hard to find. After you've turned your thermostat a few degrees in the proper direction, installed energy efficient lights, signed up for green power, and cut down on your transportation emissions, you know you've done some good, but it's kind of hard to see. Especially when you look in your wallet. The investments in efficiency will pay off, but only over time.
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By Hans De Keulenaer / Published on Sat, 2007-02-10 12:06
Electricity generation and consumption must be maintained in constant balance at all times in any network. System operators typically achieve this by calling on large fossil-fuelled power stations to operate flexibly, which incurs high financial and environmental costs. With growing demand, declining fossil fuelled generation, and increasing renewables, the need for economic and low-carbon flexibility is becoming acute.
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By Hans Nilsson / Published on Wed, 2006-08-23 05:16
Demand Response is still under development and we are still far from seeing the full scope of how customers (and their appliances) in the future will be able to "negotiate" on-line for prices, terms and deliveries. One thing is quite certain and that is that new technologies are required. For metering and for communications but also for what they in the U.S. call "Grid-friendly appliances".
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