Since the development of green energy, the proportion of green energy in many countries has been increasing. Green supporters have been very vocal about the so-called "unstable" criticism of opponents. Especially with satellite imagery, cloud conditions and wind conditions are more and more accurate. Regardless of the decline in solar power generation caused by cloud shading and the reduction of wind power generation caused by wind weakening, the power grid can respond in advance. There is no real unexpected sudden state of instability, but the grid still holds green energy. Holding the "unstable" view is not so much an instability as it is because "there is no stable power."
The so-called "stable power" refers to the turbines and flywheels that are synchronized with the grid's AC frequency in the traditional power generation mode. These devices have huge masses, continuous high-speed rotation during power generation, and strong inertia, once generated on the grid. Any accident, such as a sudden jump of a unit, or an accident in a power plant, the imbalance between supply and demand causes the frequency of the alternating current on the grid to dip, the inertia of these rotating equipment becomes a powerful "stable force" because of inertia. Resisting the deceleration, these units can automatically increase the output instantaneously, the amplitude of the buffer frequency dips, gain time for the grid operators, and start various preparation equipment and measures to prevent the grid from collapsing.
Solar energy does not have this kind of "stable power". Although the wind turbine has a huge mass rotating, but it is not directly synchronized with the power grid, it does not have the function of automatically boosting the output buffer as in the above various rotating devices, so the past is also regarded as the same. “There is no stable powerâ€, which is a hindrance to the acceptance of the power grid. However, since the fan has a huge mass in rotation, it can deliberately adopt unconventional operation, at the expense of kinetic energy, slowing down the fan speed, and suddenly pull up the power generation to simulate the inertial response of other equipment. This technology is called as "inertial synthesis" (synthetic inertia).
Synthetic inertial technology can solve the long-standing concerns of the power grid. With many green energy pioneer in the development of national green energy accounted for increasingly high proportion of electricity generation sources online have the ability to stabilize inertia relative reduction in the proportion of operators increasingly concerned as soon as any unexpected situation "stable power" shortage but if the wind turbine can provide a "stabilizing force" in order to synthesize inertia, the grid operators may worry more.
Of course, energy is not something out of nothing, whether traditional stabilizing force of inertia, or fans of the resulting inertia, must pay the price, and that is because the kinetic energy is converted into electrical energy, the speed will slow down, and sometimes use other measures to improve the energy input after output Pulling back the speed, in the past, if the grid has a major accident in half an hour, it may not be able to avoid the power jump. It is because the rotation inertia is used up, and the speed is still rising, and an accident occurs. The inertia is insufficient and the force is too late.
Fans help Quebec Power Grid to Crisis
The synthetic inertia of the fan is also the same. When the output is increased for a while, the fan blade speed is reduced, and the wind energy can be extracted to re-accelerate the fan, so that the power generation is greatly reduced, resulting in a prolonged recovery time of the power grid; or if the setting is wrong, the wind energy is drawn. Too much, the power supply is reduced too much, and it may even happen that the power grid will have a second-degree crisis. Therefore, the latest synthetic inertia development, taking into account this possibility, will limit the power drawn during the re-acceleration period to avoid causing a second-degree crisis.
Synthetic inertia used to be a theory. Today there are examples of practical applications and the crisis of the power grid. Hydro-Québec Transénergie, the Hydro-Québec transmission department in Quebec, Canada, is the world's first grid operator to regulate the use of synthetic inertia. It currently has 3,300 megawatts (MW) of wind power capacity. Since Quebec Power Grid is the smallest power grid in North America, its peak capacity is only 40 GW. Relatively speaking, any accident has a greater impact on the grid. Sexual needs are also more eager.
Therefore, Quebec hydropower transmission has to have a synthetic inertia function since 2005. It is stipulated that wind turbines must be able to provide 6% of the power generation capacity of the grid in the event of a frequency drop caused by the grid accident, helping the grid to tide over the difficulties. Equipped with synthetic function of the first batch of inertia blower completed on-line in 2011, wind turbine manufacturers from India, Suzlon Energy (Suzlon) Germany's fan solution vendors Senvion, as well as the largest German wind turbine manufacturer Enercon (ENERCON), and now Hydro-Quebec On the power grid, there are two-thirds of the total number of fans with synthetic inertia.
In December 2015, these wind turbines came in handy, and a major substation accident occurred in the Quebec power grid, causing the 1,600 megawatt power source to be disconnected. The combined inertia of each fan was a total of 126 megawatts of emergency output to prevent system collapse and support Quebec. The frequency of the grid is only reduced to 59.1 Hz. It is estimated that if there is no synthetic inertia, it will drop 0.1~0.2 Hz. Quebec hydropower transmission estimates that if these fans are changed to the traditional inertia power generation, the support can be provided. The same is true for the magnitude.
That is to say, in the first time strain phase of the accident, the synthetic inertia performance is as good as the traditional inertia.
However, during the recovery phase, according to Enercon data show that, in order to return to optimal speed, power and some large fans down 60%, which makes the overall speed of recovery slows down the grid, grid frequency of 59.4 Hz in Quebec therefore remain for some time After that, additional power is input to return to the normal value of 60. Québec Grid takes this experience and intends to limit the wind energy that the wind turbine uses to recover the speed when it is in the recovery phase, which cannot exceed 20% of the nominal power generation capacity.
The experience of Quebec Power Grid proves that after the fan is equipped with synthetic inertia function, although the parameters need to be adjusted to optimize the operation during the recovery period, it can be initially used as the “stable force†of the inertia of the traditional power generation method. Under the trend of increasing popularity, it is a good news for all grid operators around the world, and it is also a great boost to the further development of the wind energy industry. In the future, most of the fans are equipped with synthetic inertia functions, and the grid will no longer be used. Complaining that wind energy is “unstable†because it is also one of the “stability forcesâ€.Cbd Vape Products Oem,D8 Vape Pen Oem,Cbd Disposable Vape Pen Oem,China Cbd Vape Products Oem
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