The wind power has low-voltage cross-reconstruction bills, or over 10 billion yuan in reform costs and who will bear the problem. The opinions of the industry vary.
Wind power equipment, a highly specialized feature - low voltage ride through capability is becoming a familiar new term in the industry.
This round of concern was triggered by the recent three large-scale fan off-grid accidents reported by the Electricity Regulatory Commission. The root cause of the accident was that wind turbines did not have low-voltage ride-through capability. According to the “Circular on Strengthening the Safety Supervision and Management of Wind Farms and Reducing the Large-Scale Wind Turbine Off-grid Accident†issued by the State Electricity Regulatory Commission, units that do not have low-voltage ride-through capability must formulate practical and feasible low-voltage traversing capability reforms as soon as possible. Plans to supervise the implementation of equipment manufacturers.
An action for the transformation of wind turbines with low-voltage crossings will soon begin in the entire wind power industry. Liu Chun, deputy director of the New Energy Institute of the Chinese Academy of Electric Power, said in an interview with a reporter of the New Energy Guide that the transformation will involve most of the fans in the country.
As for the cost of reconstruction, the opinions of the industry are different. The opinion of the equipment manufacturer Goldwind Technology stated that the number of wind turbines needed for this transformation is only 100,000 yuan, and many industry experts told the reporter of the New Energy Guide that the cost of retrofitting Far more than this figure.
“According to our calculations, the minimum price for a wind turbine to carry out low-voltage ride-through transformation is 500,000 yuan.†Zhang Xinbin, deputy director of the Development Planning Department of Datang New Energy, told the reporter of New Energy Guide that if this is followed, According to digital calculations, the cost of reconstruction for more than 20,000 wind turbines across the country is likely to exceed 10 billion yuan.
The large-scale transformation of wind turbines has inevitably led to the massive off-grid accidents of wind power that have occurred intensively from this year.
On February 24, Gansu Jiuquan accidentally netted 598 wind turbine generators, resulting in a loss of 840.43 megawatts. On April 17, 702 wind turbine generators escaped from the grid in Ganzhou, Gansu, with a loss of 1006.223 MW. On the same day, Zhangjiakou, Hebei Province There were 644 wind turbine off-grid accidents and 854 MW of wind power output was lost.
According to the “New Energy Guide†reporter, a large-scale 1278 blower off-grid accident occurred in Jiuquan, Gansu Province in the recent days, which not only created a number of wind power net off-grid records, but also caused a huge impact on the safe and stable operation of the power grid.
According to the accident report results of the SERC, in the above accidents, the lack of low-voltage ride-through capability was the root cause. According to Wang Ningqi, director of the Wind Power Center of Gansu Provincial Electric Power Company, "At present, wind turbines in China's wind farms generally do not have low-voltage ride-through capability." Zhang Xinbin told the "New Energy Guide" reporter. In fact, the State Grid Corporation promulgated the "Wind Farms" in 2009. The Technical Regulations on the Power Grid clearly requires that the wind farm voltage does not fall within 20% of the rated voltage for a duration of 625 milliseconds, and within 2 seconds the voltage recovers to within 90% of the rated voltage. This range of wind farms allows off-grid.
However, this corporate standard is not binding on wind turbine manufacturers. Most fans do not have this function after they leave the factory. Some wind power operators also did not realize the importance of this function and did not specify it in the supply contract.
Statistical data from the Institute of New Energy Research of the Chinese Academy of Electric Power shows that currently there are only six models of six companies that have passed the low-voltage ride-through capability test and power characteristics test, and two of them are foreign companies. In fact, there are more than 80 wind power enterprises in China, involving dozens of models.
The frequent occurrence of wind power off-grid accidents has strengthened the country’s determination to implement wind turbine low-voltage ride-through transformation. Qin Ming, director of the State Power Joint Wind Power Equipment Technology Research Institute, told the reporter of the “New Energy Guide†that the China Electricity Regulatory Commission issued a notice requesting that the rectification is one direction, and that the relevant national competent authority may follow the technical regulations for access to the power system. Promulgated relevant implementation details to supervise grid-connected operation of wind farms for transformation. “A large area of ​​wind turbines may face changes. Wind power equipment manufacturers should make technical preparations and formulate technical solutions for the transformation of grid-connected wind turbines.â€
Reform costs vary from one side to the other In the view of the industry, the low-voltage ride-through of wind turbines is not a remarkable function. If the transformation is carried out, it is technically not a problem, but the cost of retrofitting is a difficult task.
According to Goldwind's calculations, the transformation of the low-voltage ride-through capability of the already-in-produced wind turbines requires only software and hardware upgrades of the controllers, and the cost of upgrading the wind turbine itself is approximately 10,000 yuan each.
"After different wind turbines, the cost of retrofitting the technical route will also be different, and 10,000 yuan may be the lowest. If you then count the cost of replacement of the controller and the cost of implementing the renovation, the cost of rebuilding each turbine should be more than 100,000 yuan. "Yao Yu, director of the Goldwind Public Affairs Department, told reporters.
"New Energy Guide" reporter found in the survey, this data is not the consensus of the industry, the cost of transformation may be far more than 100,000 yuan.
Datang New Energy Co., which has more than 4 million kilowatts of wind power installed capacity, has its own calculation results. Zhang Xinbin told the reporter of New Energy Guide that according to their calculations, a wind turbine should undergo low-voltage ride-through capability reform with a minimum price of 500,000 yuan. .
Qin Ming said: “There are dozens of domestic wind turbine manufacturers. Each company has different technical routes, double-feedback, direct drive, and different models under the same technology route. The cost of retrofitting is definitely not the same. It is estimated that the cost of rebuilding a wind turbine varies from about 100,000 to 500,000. We combined the power of the wind turbines, and the cost of reconstruction is about this intermediate value." And Liu Chun bluntly, some wind turbine reform costs may be more than a million yuan. Some may only need tens of thousands of yuan.
Why are the gaps so great from all walks of life? Qin Ming analyzed with the reporter of the New Energy Guide: "Because some transformations may involve the replacement of parts. For example, the entire controller may have to be replaced. The cost is very high. Others only need to upgrade the software. The cost is very low. The operator's calculation results may also include the amount of electricity lost during the transformation, so the gap is relatively large. It is understood that by the end of 2010, China's cumulative installed capacity of wind power reached 42 million kilowatts, the number of installed wind turbines More than 20,000 units, most of which were put into operation from 2008 to 2010, most of the installed fans do not have the capability of low voltage ride through and need to be transformed.
If according to Datang Renewable Energy's renovation cost of RMB 500,000 per station, domestic wind power companies and equipment manufacturers will pay more than 10 billion yuan for wind turbine reconstruction.
Equipment companies are reluctant to bear all the costs. A wind farm with an installed capacity of 300,000 kilowatts is calculated at 3 megawatts per wind turbine and the number of fans is 100. If the cost of a low-voltage ride-through for a wind turbine is 500,000 yuan, then The cost of such a wind farm will reach 50 million yuan.
For wind power companies with installed capacity of several million kilowatts, such renovation costs are not a small figure.
Is such a huge transformation cost actually borne by the wind power operator or is it assumed by the equipment manufacturer? This is a very sensitive and important topic for both parties.
According to Zhang Xinbin, if wind power operators and equipment manufacturers sign supply contracts, it is already clear that wind turbines must have low-voltage ride-through capability. However, the fan provided by equipment manufacturers does not have this capability, and this part of wind farms will be transformed. The cost will no doubt be borne by the equipment manufacturer. If the contract signed by both parties does not specify this point, it should be negotiated by both parties to formulate solutions and share the burden.
In response, Liu Chun expressed similar views when interviewed by the reporter of the New Energy Guide.
However, Qin Ming, the director of the Research Institute of China Wind Power Co., Ltd., a research institute under the wind power equipment company, has a different view.
“A contractual wind farm is reasonable, but it is reasonable for the equipment company to bear the cost of the renovation. However, it is not appropriate for the equipment company to bear the responsibility for the equipment that was put into operation in the previous years and there was no explicit requirement in the contract. One person bought a black-and-white TV set. After a few years, the color TV set came out. This person said no. Why did you not have the function of color display in this TV set? Would you like to change the color picture tube for me? “Qin Ming believes that wind power low voltage ride through is a new technology. Under certain historical conditions in the past, the government and users have not made similar requests. Now that the technology has progressed, this technology will become a universal function. This time again In retrospect, equipment companies must change their requirements, but if the cost is borne by equipment companies, it is not appropriate.
"Anyway, the transformation of wind turbines' low-voltage ride-through capability is related to the safe and healthy development of wind power, but it also involves multiple interests. We hope that the relevant national authorities can issue a reasonable solution to solve this problem," said Zhang Xinbin.
Wind power equipment, a highly specialized feature - low voltage ride through capability is becoming a familiar new term in the industry.
This round of concern was triggered by the recent three large-scale fan off-grid accidents reported by the Electricity Regulatory Commission. The root cause of the accident was that wind turbines did not have low-voltage ride-through capability. According to the “Circular on Strengthening the Safety Supervision and Management of Wind Farms and Reducing the Large-Scale Wind Turbine Off-grid Accident†issued by the State Electricity Regulatory Commission, units that do not have low-voltage ride-through capability must formulate practical and feasible low-voltage traversing capability reforms as soon as possible. Plans to supervise the implementation of equipment manufacturers.
An action for the transformation of wind turbines with low-voltage crossings will soon begin in the entire wind power industry. Liu Chun, deputy director of the New Energy Institute of the Chinese Academy of Electric Power, said in an interview with a reporter of the New Energy Guide that the transformation will involve most of the fans in the country.
As for the cost of reconstruction, the opinions of the industry are different. The opinion of the equipment manufacturer Goldwind Technology stated that the number of wind turbines needed for this transformation is only 100,000 yuan, and many industry experts told the reporter of the New Energy Guide that the cost of retrofitting Far more than this figure.
“According to our calculations, the minimum price for a wind turbine to carry out low-voltage ride-through transformation is 500,000 yuan.†Zhang Xinbin, deputy director of the Development Planning Department of Datang New Energy, told the reporter of New Energy Guide that if this is followed, According to digital calculations, the cost of reconstruction for more than 20,000 wind turbines across the country is likely to exceed 10 billion yuan.
The large-scale transformation of wind turbines has inevitably led to the massive off-grid accidents of wind power that have occurred intensively from this year.
On February 24, Gansu Jiuquan accidentally netted 598 wind turbine generators, resulting in a loss of 840.43 megawatts. On April 17, 702 wind turbine generators escaped from the grid in Ganzhou, Gansu, with a loss of 1006.223 MW. On the same day, Zhangjiakou, Hebei Province There were 644 wind turbine off-grid accidents and 854 MW of wind power output was lost.
According to the “New Energy Guide†reporter, a large-scale 1278 blower off-grid accident occurred in Jiuquan, Gansu Province in the recent days, which not only created a number of wind power net off-grid records, but also caused a huge impact on the safe and stable operation of the power grid.
According to the accident report results of the SERC, in the above accidents, the lack of low-voltage ride-through capability was the root cause. According to Wang Ningqi, director of the Wind Power Center of Gansu Provincial Electric Power Company, "At present, wind turbines in China's wind farms generally do not have low-voltage ride-through capability." Zhang Xinbin told the "New Energy Guide" reporter. In fact, the State Grid Corporation promulgated the "Wind Farms" in 2009. The Technical Regulations on the Power Grid clearly requires that the wind farm voltage does not fall within 20% of the rated voltage for a duration of 625 milliseconds, and within 2 seconds the voltage recovers to within 90% of the rated voltage. This range of wind farms allows off-grid.
However, this corporate standard is not binding on wind turbine manufacturers. Most fans do not have this function after they leave the factory. Some wind power operators also did not realize the importance of this function and did not specify it in the supply contract.
Statistical data from the Institute of New Energy Research of the Chinese Academy of Electric Power shows that currently there are only six models of six companies that have passed the low-voltage ride-through capability test and power characteristics test, and two of them are foreign companies. In fact, there are more than 80 wind power enterprises in China, involving dozens of models.
The frequent occurrence of wind power off-grid accidents has strengthened the country’s determination to implement wind turbine low-voltage ride-through transformation. Qin Ming, director of the State Power Joint Wind Power Equipment Technology Research Institute, told the reporter of the “New Energy Guide†that the China Electricity Regulatory Commission issued a notice requesting that the rectification is one direction, and that the relevant national competent authority may follow the technical regulations for access to the power system. Promulgated relevant implementation details to supervise grid-connected operation of wind farms for transformation. “A large area of ​​wind turbines may face changes. Wind power equipment manufacturers should make technical preparations and formulate technical solutions for the transformation of grid-connected wind turbines.â€
Reform costs vary from one side to the other In the view of the industry, the low-voltage ride-through of wind turbines is not a remarkable function. If the transformation is carried out, it is technically not a problem, but the cost of retrofitting is a difficult task.
According to Goldwind's calculations, the transformation of the low-voltage ride-through capability of the already-in-produced wind turbines requires only software and hardware upgrades of the controllers, and the cost of upgrading the wind turbine itself is approximately 10,000 yuan each.
"After different wind turbines, the cost of retrofitting the technical route will also be different, and 10,000 yuan may be the lowest. If you then count the cost of replacement of the controller and the cost of implementing the renovation, the cost of rebuilding each turbine should be more than 100,000 yuan. "Yao Yu, director of the Goldwind Public Affairs Department, told reporters.
"New Energy Guide" reporter found in the survey, this data is not the consensus of the industry, the cost of transformation may be far more than 100,000 yuan.
Datang New Energy Co., which has more than 4 million kilowatts of wind power installed capacity, has its own calculation results. Zhang Xinbin told the reporter of New Energy Guide that according to their calculations, a wind turbine should undergo low-voltage ride-through capability reform with a minimum price of 500,000 yuan. .
Qin Ming said: “There are dozens of domestic wind turbine manufacturers. Each company has different technical routes, double-feedback, direct drive, and different models under the same technology route. The cost of retrofitting is definitely not the same. It is estimated that the cost of rebuilding a wind turbine varies from about 100,000 to 500,000. We combined the power of the wind turbines, and the cost of reconstruction is about this intermediate value." And Liu Chun bluntly, some wind turbine reform costs may be more than a million yuan. Some may only need tens of thousands of yuan.
Why are the gaps so great from all walks of life? Qin Ming analyzed with the reporter of the New Energy Guide: "Because some transformations may involve the replacement of parts. For example, the entire controller may have to be replaced. The cost is very high. Others only need to upgrade the software. The cost is very low. The operator's calculation results may also include the amount of electricity lost during the transformation, so the gap is relatively large. It is understood that by the end of 2010, China's cumulative installed capacity of wind power reached 42 million kilowatts, the number of installed wind turbines More than 20,000 units, most of which were put into operation from 2008 to 2010, most of the installed fans do not have the capability of low voltage ride through and need to be transformed.
If according to Datang Renewable Energy's renovation cost of RMB 500,000 per station, domestic wind power companies and equipment manufacturers will pay more than 10 billion yuan for wind turbine reconstruction.
Equipment companies are reluctant to bear all the costs. A wind farm with an installed capacity of 300,000 kilowatts is calculated at 3 megawatts per wind turbine and the number of fans is 100. If the cost of a low-voltage ride-through for a wind turbine is 500,000 yuan, then The cost of such a wind farm will reach 50 million yuan.
For wind power companies with installed capacity of several million kilowatts, such renovation costs are not a small figure.
Is such a huge transformation cost actually borne by the wind power operator or is it assumed by the equipment manufacturer? This is a very sensitive and important topic for both parties.
According to Zhang Xinbin, if wind power operators and equipment manufacturers sign supply contracts, it is already clear that wind turbines must have low-voltage ride-through capability. However, the fan provided by equipment manufacturers does not have this capability, and this part of wind farms will be transformed. The cost will no doubt be borne by the equipment manufacturer. If the contract signed by both parties does not specify this point, it should be negotiated by both parties to formulate solutions and share the burden.
In response, Liu Chun expressed similar views when interviewed by the reporter of the New Energy Guide.
However, Qin Ming, the director of the Research Institute of China Wind Power Co., Ltd., a research institute under the wind power equipment company, has a different view.
“A contractual wind farm is reasonable, but it is reasonable for the equipment company to bear the cost of the renovation. However, it is not appropriate for the equipment company to bear the responsibility for the equipment that was put into operation in the previous years and there was no explicit requirement in the contract. One person bought a black-and-white TV set. After a few years, the color TV set came out. This person said no. Why did you not have the function of color display in this TV set? Would you like to change the color picture tube for me? “Qin Ming believes that wind power low voltage ride through is a new technology. Under certain historical conditions in the past, the government and users have not made similar requests. Now that the technology has progressed, this technology will become a universal function. This time again In retrospect, equipment companies must change their requirements, but if the cost is borne by equipment companies, it is not appropriate.
"Anyway, the transformation of wind turbines' low-voltage ride-through capability is related to the safe and healthy development of wind power, but it also involves multiple interests. We hope that the relevant national authorities can issue a reasonable solution to solve this problem," said Zhang Xinbin.
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