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This reporter learned that, because there is no wind turbine and wind electric field network standards and testing standards, the vast majority of wind turbine power curve, power quality, active and reactive power regulation performance, low-voltage through the ability to have not been qualified institutions Detect. Jilin Power Grid happened this year for 400,000 kilowatts wind turbine at the same time removed the case, the reason for this is that these units do not have the low voltage across the capacity. There are a number of electrified railway near the wind farm, because of anti-interference ability is not strong, on the train when it happened, after resection of the phenomenon of generating units.
China's deputy chief engineer of EPRI, IEEE (American Institute of Electrical and Electronics Engineers) of Electricity and Energy Association, Beijing Branch President Hu Xuehao told reporters that the quality of wind turbine power system security questions are a potential threat, an urgent need third-party testing organizations of the factory The wind turbine of quality certification, from the source to eliminate unqualified access wind turbine power system. To this end, China has established a special electric ASTRI first domestic renewable energy laboratory, to carry out wind turbine and wind electric field to run Detect the relevant work.
"With regard to the above question has a lot of foreign experience is worth our reference. EPRI China through the Sino-German project of international cooperation, foreign well-known testing body contact training, purchase of test equipment, and hire experts in teaching international authority for renewable energy laboratory construction provided key support. "Hu Xuehao said that renewable energy laboratory has had the wind turbine power characteristics of power quality testing and test capabilities, completed the 01,500 kilowatts Jinfeng type direct-drive wind turbine and 01,500 kilowatts CRE doubly-fed wind turbine type of test items, and other test items are also in progress.
Hu Xuehao also introduce the next step Renewable Energy Laboratory's intention to implement the wind turbine noise tests, unit load testing machinery, as well as the wind turbine capacity through low-voltage testing capacity building.
Wind electric power prediction systems: wind power and network technologies necessary
As we all know, the wind with intermittent electricity and volatility, while the power system are real-time balance, the wind fluctuations in electricity required by conventional power conditioning and energy storage system to balance, this is the long-standing problem of wind power and the largest network problems. Now that the main output of wind farm the size of a decision by the wind and difficult to artificially control, then to anticipate the possibility of wind farm output of this? If we can achieve this, wind power impact on power grids will also become smaller.
In this regard, Hu Xuehao think, wind electric power can be predicted, and wind electricity grid are an essential means of technology. Electricity through wind power prediction, it is reasonable arrangements for the operation of conventional power, reducing standby power system capacity, improve the economic operation of power system, at the same time enhance the power system's ability to accept wind power. Therefore, wind electric power are bound to the future prediction system and stable operation of power grids, power grids, scheduling, operations such as the electricity market required an important technical support. According to Hu Xuehao disclosed that China EPRI currently bear country scientific and technological support scheme "wind farm output power prediction system development and demonstration of application", as well as the State Grid Corporation of multiple research projects. The hospital under way the wind prediction method of electric power and in seven networks, the provincial electric company set up wind power prediction system, all projects will be completed in 2009. The first demonstration project - Jilin electricity grid wind power prediction system will be put into operation recently.
Wind power and network technology standards: standardizing the construction of wind power guide
Different power supply out of electricity vary. If the wind power quality standards, network security will be seriously affected. Hu Xuehao analysis, countries that require the full acquisition of enterprise grid wind electricity grid that is also in line with the standard wind power, wind power in recent years with rapid growth, introduction of wind power and network-related technical standards appear to be particularly urgent.
Study in the Hu-ho, the wind farm on the grid to the corresponding technical requirements, on the one hand be able to ensure that wind farm and power system safe and stable operation, a clear and wind electric power grid enterprises responsibilities and obligations of developers to adapt to China's future large-scale construction of wind farm the actual needs; On the other hand, home-made wind turbine technology to provide the right development direction of the guide, so that home-made wind turbine performance gradually reached the international advanced level.
According to introduction, starting in 2005, China EPRI began the preparation of China's "wind farm access to the technical requirements of power system" and the State Power Grid Company "wind farm grid technology provides access to research." The end of that year, AQSIQ and National Standardization Committee on the released GB/Z19963-2005 "wind farm access to the technical requirements of power system." At present, China EPRI ongoing revision of the standard to make it more adaptable to current and future large-scale development of China's wind electricity demand.