Denmark more than 5,000 wind turbines available is operating, some of these fans standing in the large-scale offshore wind farms, and some are located in the countryside.
Fan total installed capacity of 3100 MW, if the wind speed reached 10 meters per second, these fans of the electricity to meet peak periods of all households in Denmark, electricity consumption, that is, between the points at 5-7, great people in the preparation of dinner, the children watch television.
Do not stop at 20%, Denmark plans in 2013, the total installed capacity of wind power capacity increased by 40%, in 2025, half of Denmark’s electricity supply comes from wind energy.
“And the Chinese counterparts, the Danish wind power generator for troubled wind power to solve this problem, Denmark has been studied for over 20 years”, the Danish state-controlled energy group DONG Kund Pedersen, vice president of introduction.
“Solve the secret of wind power in fact more than one”, the Danish National Grid Company’s strategic planning director Dorothy Winn Joseph explained.
Joseph Wen said, to make wind power grid network and to ensure good operation condition is very much needed. Including the power grid construction, planning, accurate wind forecasts, in the absence of sufficient time to use wind power reserve resources, benign electricity market, supply and demand balance of buyers and sellers, but consumers must also bullish on wind power electricity.
Denmark’s strong smart grid
On the wind the story of how the grid should start from a strong intelligence network. Denmark’s strong and smart grid from Denmark, the Danish electricity network operator National Grid company began.
In 1998, the Danish government to the power system and the development of renewable energy business entrusted to the electricity network operators – the western and eastern ELKRAFT ELTRA Inc. company. In 2004, the two companies merged to become today’s Danish national grid.
90 years of the 20th century, the first large-scale wind generator grid, the same power transmission system to bring Denmark a lot of pressure. Timely realization of the European Union made a final free trade within the EU electricity market directive for the lifting of the state toward power generation and transmission barriers.
Danish National Grid electricity market, the vice director Lai Nasuo that said, “In order to ensure the effective use of wind, must have the ability to transport power across Europe much-needed electricity to the local. This is why the Danish State Grid Corporation of spending hundreds of millions each year Crown, for the expansion and strengthening of the Danish power grid construction and other links between the national grid (1 Danish krone about 1.14 yuan). ”
Lai Nuosuo that National Grid companies in Denmark for renewable energy and wind  power generation, “To accomplish this task, we must use a strong planning, such as the assessment of wind field grid location and laying of the new estimate.”
In addition, no backup power when the wind is also very important, coal-fired power generation is an option, while Norway’s water and electricity are also good choices.
When the weather is changeable, the Danish national fan power output may be within a few hours to rise from 0 to 3100 MW from 3100 MW may be down to 0.
Denmark State Grid Corporation of power system development, the vice director Peter Jorgensen explained: “Denmark’s geographical position is superior, north of hydropower stations, thermal power plant south. Therefore, when the wind is not enough, we can from Norway the introduction of clean water. but in the summer, when the thermoelectric power plant refinery does not require as much as the winter as supplies of electricity and heat, the Danish are often imported from the Norwegian Water. ”
This power is often sent each other a year, the Danish import and export of electricity to the country’s total electricity consumption equivalent to 30%.
This strong reliance on each other to send the same power and transnational power grid in Denmark.
Power to the Nordic countries Denmark and Europe, linking a strong European power system is large-scale renewable energy grid and optimize the existing network premise. As early as 1965, the Danish island of Jutland and the Swedish cable has been linked in the 70’s, Denmark and Norway, to connect the cables.
24 day price system
Strong smart grid, the Danish grid also rely heavily on large-scale wind power turbines in electricity prices led and flexible pricing system.
“Danish green power grid to take the principle of priority and network. Wind power market, the price is set to the lowest price. Wind power supply fluctuates with weather changes, so other types of energy to generate electricity prices must fluctuate”, DONG company Kund Pedersen, vice president, said.
The direct benefits of this policy is power – the Nordic Power Exchange Center Marketing Director  said, “This market model forced other electricity suppliers will only really profitable when power generation, to ensure users in Denmark to the most environmentally friendly electricity. “The trading center is responsible for power trading between the Nordic countries.
In Denmark, the price of wind power for the grid is very sensitive to any changes in electricity grid will lead to price rise or fall.
Danish State Grid Corporation of total dispatcher  Anderson said that the Danish electricity supply law, must give priority to renewable energy generation into the grid, because the marginal cost of wind power is very low, the price of wind power is basically the market minimum price.
Every day, the Nordic Power Exchange Center to be the next 24 hours under the power supply and demand projections, given the power by hour offer. When windmill  power exceeds the Danish electricity demand, market price will drop, and when the overall electricity generating capacity over time, the final settlement price may fall below zero. However, this zero-price wind power will only appear in the transport to the grid operator, the user must pay a variety and environment-related taxes, equivalent to approximately three-quarters of the total tariff.
1 or 2 times a year, the Danish wind power generation capacity will exceed its customers needs, this time the Danish power companies must quickly identify the most expensive in Europe where the price and the electricity sent here.
In addition, the Nordic electricity market has also introduced a negative tariff system means that when the electricity market is saturated, the electricity supplier if you want to generate electricity, also have to pay. The system is designed to urge the power plant in time to stop power generation, power supply and demand balance to reduce the maintenance work.
“In principle, the Nordic power system can achieve a balanced trade. This is the market mechanism: We have extra fat, buy cheap electricity, but high prices of electricity sold to local needs.”
Once the strong westerly wind, electricity trading center in the Nordic electricity prices have plummeted – this time, the Danish wind turbines are operating at full capacity 5200 running at full speed, wind power 3100 MW of peak power, and we all got off work .
Can measure the electricity consumption and electricity generation
Denmark’s electricity policy also requires a technology to ensure that – can predict the electricity consumption and wind power generation.
The reality is, the Danish National Grid can really predict the average Danish electricity consumption. The total Danish electricity consumption statistics have been accurate to date and hour, giving the control center staff was of great help.
As for the wind speed forecast, an old Chinese saying, “Accidents will happen” – Danish National Grid Control Centre’s main task is to monitor and forecast wind speed is fully consistent with, but it is still ideal.
So when the wind speed at 5 meters per second to between 15 meters per second, the wind speed changes of 1 meter per second, changes in the Danish power grid electrical power stroke will reach 350 MW. Control center staff must always be concerned about the fan capacity. Once the power of more than forecast, to be immediately adjusted.
The system’s advanced network control center can help the daily work of staff, and wind power plants and through the network at any time to read the data, wind data can be updated in real time to fluctuations in the power generation control can deal with range.
Technically, to solve the problem of small wind turbines fluctuations, the control center staff mediation mainly two ways up and down, similar to the car’s throttle and brake the two movements, a number of plants used for throttle, some power plants as a brake. Typically, a day of wind power fluctuations can reach 50 times, which poses a challenge to the dispatcher.
When all those involved in the Nordic electricity market, power plants are in normal operation, the 34-screen data tell the dispatcher that they can be in Denmark, Germany, Norway and Sweden, where “brake” and “step on the gas” – to call plant shows a certain period of time to allow the additional power and corresponding price. Once the power output more than expected, the dispatcher must immediately inform the plant to stop super-fat.
Danish National Grid Company intends to further expand the network interconnection between countries is not confined to national power grids.
Some European countries also suffer from power transmission problem, which makes the European wind power Yanjiu project has 13 European members, the system Fenxi Shi  said, “If the Danish network to achieve 50% power to from renewable energy sources, all systems have to collaborate together. ”
Be achieved if the European Union by 2020 renewable energy consumption accounted for 20% of the target, all countries must accept the conditions of interconnection in cooperation.
In renewable energy, Denmark also more ambitious, “We must play a greater role in wind power, such as for transportation, electric vehicles, building heating and so on. We have to integrate the power system, more development of wind power use “, DONG Kund Pedersen, vice president, said.
An ideal scenario is that the strong wind, the Danish wind turbine generator to the optical transmission developed in Spain, while Spain will give the sun’s light to no wind in Denmark.

Related Articals