The question is: what can we do to be more in harmony with the environment? The answers we present here are intended to be practical pieces of an answer to that question.
We want the ability to directly support the development of renewable electricity generation. We don’t just mean buying GreenPower from sources that already exist. We want to be able to choose to put our money out there so that these things can actually happen. We want to support projects that haven’t yet been built, or even started.
Solar thermal power generation presents a unique opportunity among renewable technologies today. It is well-understood. Prototypes and commercial power plants of this sort exist. It has capabilities for both baseload and peak-matching power generation. It is affordable in locations with lots of sunlight. Costs are in the range 10-15¢/kWh currently, with great potential for the future.
The feed-in tariff is a well known policy mechanism in the area of electricity generation. It has been applied in many countries with the intent of encouraging the development of renewable power generation. Such a policy typically involves guaranteeing to desired types of generation both subsidized long term prices for electricity and guaranteed grid access. This policy has been well utilized notably in Germany and Spain, where residents have seen very stable electricity prices coupled with tremendous growth of the renewable energy sector of their economies.
When wind isn’t blowing hard, use a dispatchable source such as hydro to produce power. Let’s assume that we have 150 MW of hydro on hand to cover the Centennial Wind Farm when the wind isn’t blowing. If we look at entire year of production, we can expect that about 42.4% of all energy will have come from the wind, and that the remaining 57.6% of the energy would have come from the hydro. What is necessary for a system like this to work is to have enough water behind the hydro dam that it can cover a fairly long spell of low winds. This could be as long as several days. If our hydro reservoir is big enough to cover that time, we should be able to cover the intermittent nature of the wind for the whole year. If it isn’t big enough, we will have to get our power from elsewhere. Perhaps importing it from neighboring grids or by using another source such as natural gas.
What people really want is reliable power. We don’t want to end up freezing in the dark. Electricity is important enough to our society that our energy security is of great importance to us. This is a fundamental issue that all technically advanced nations have to face.
It would be a mistake to equate baseload with reliable. Baseload power sources still have to turn off sometimes. In some cases, the downtimes for the big thermal plants such as nuclear and coal can be several percent of their lifetimes. If our power grid were based off of only baseload sources of this type we might see rolling blackouts now and then unless we built extra power plants to cover the downtime.
In the most general sense, we are talking about moving power from one place to another. The electric grid accomplishes this by having power lines between generation stations and demand locations such as homes and businesses. Some general rules apply to this sort of technology. The more power you have to move, the more expensive it will be to build the infrastructure to do it. The further you have to move the power, the more energy losses you are going to have in doing so. These rules apply in general, but the specifics of a problem will dictate what sort of solution is applied.
We proposed a feed-in tariff for renewable energy resources such as wind, solar, and hydro power. What this means is basically that people or companies who produced power from these sources would be paid more for their electricity than non-renewable providers. See our proposal for more details about the practicality and effectiveness of a feed-in tariff as well as more detail on tailoring the solution for Saskatchewan. The intent of this policy mechanism is to stimulate an increase in private investment into these technologies.
This piece refers to kilowatt-hours (kWh) and costs-per-kWh as well as cost per installed watt ($/kW). If you are new to these units, please consult our introduction to energy system terms. In this area of knowledge, we defer to our publicly-owned utility for the best possible answer. Sask Power’s analysis in 2009, submitted to the […]
If you think of renewable sources of energy you probably think of things like wind turbines, solar panels, biomass plants, and hydroelectric plants. However, these are just examples. What does it mean to be renewable?
A Feed-in-Tariff is a policy mechanism designed to provide an incentive for development of a desired type. Typical implementations of feed-in-tariffs for power generation usually involve guaranteed long term prices for electricity generated and guaranteed grid access. This means that if a person or company builds this type of desired generation, they are guaranteed to be able to sell their power, and guaranteed a minimum price for their power.
“Wind Power” is the extraction of energy from the wind. Common techniques use a tower with a set of propeller blades that will spin when wind blows against them. Wind power is a renewable form of energy because wind is caused by the uneven heating of the earth by the sun.