National power generation hours and wind curtailment

What are Wind Energy Curtailment levels?

Curtailment levels have generally been 4% or less of wind energy generation in regions where curtailment has occurred. A notable exception is ERCOT, where curtailment levels reached 17% in one year, primarily because wind generation came online ahead of transmission capacity. These levels have since receded to less than 2%.

Are wind and solar energy curtailments declining?

While a greater number of regions are experiencing some form of curtailment of wind and solar resources, the relative magnitude of curtailment appears to be declining in the largest markets for wind power even as the amount of wind power on the system increases.

What percentage of wind generation is curtailment?

In the countries examined in this paper, curtailment levels have often been 1–3% of wind generation or less, but vary considerably by region. In some areas, such as China, Italy, and in the ERCOT market in the United States, curtailment levels have exceeded 10% of renewable generation in some years.

What is wind curtailment?

Wind curtailment, where reported, typically ranged from about 1–3% of wind generation levels, with curtailment levels in China exceeding 10%. Curtailment levels can vary considerably across balancing areas within particular countries, as discussed above in greater detail for China and the U.S. in particular.

How is China addressing integration and curtailment of wind power?

Curtailment of wind power in China. To address integration and curtailment challenges, China is implementing improved generation scheduling, forecasting, the application of automatic generation control (AGC) systems, and constructing wind power dispatch systems.

How much wind energy has been curtailed in China?

In 2013, about 16.23 TWh of wind energy was curtailed throughout China, or about 10.74% of total wind generation, which was an improvement from the 20.82 TW h of wind curtailed in 2012 . Curtailments have been more severe in some regions with high concentrations of wind generation, as indicated by data in Table 1.