Why did power rationing in Guangdong come ahead of schedule?
2021-05-27
Reporter Xi Jinghua
Due to the large power supply load gap, many industrial zones in Guangdong Province shut down and stopped production in turn, and started off off peak power consumption to deal with the power supply problem.
Affected by the acceleration of economic recovery and the continuous high temperature, the demand for electricity in Guangdong Province is rising. Some areas in Guangdong have started off peak load shifting mode, and some enterprises in Zhongshan have coped with the difficulties by purchasing generators and adjusting working hours, Zhongshan Daily reported on May 26.
"Zhongshan daily" quoted a staff member of Chaozhou Power Supply Bureau as saying that the current load growth in some areas is far beyond expectations, and the power supply is tight or even insufficient at peak hours. If the power supply is overloaded, "the line is easy to collapse, resulting in a large area of Load Tripping and blackout, so some users need to cooperate with peak load shifting control".
Peak load shifting refers to a series of measures to guide users to adjust production arrangements to solve the short-term imbalance of power load, so as to transfer part of the load during the peak period of power consumption to the low period of power consumption, so as to reduce the peak and valley load difference of power grid.
According to interface news, peak load shifting has been in Guangdong Province for two weeks. By the end of May, the situation of power rationing continued to worsen, the scope expanded and the time extended. Some local factories had been open for three times and shut down for four times, which had a negative impact on the factory's order fulfillment. Workers could only be arranged to work in shifts in the morning and evening on the date of normal power supply.
On May 14, a manufacturer of kitchen utensils and equipment in Panyu District of Guangzhou City disclosed a notice of off peak power consumption. According to the notice, at the request of the superior power supply bureau, off peak power consumption will be implemented every Saturday from May 16, and normal work will be done on Sunday. The off peak power consumption cycle is expected to last for three months.
Subsequently, Foshan, Shantou, Dongguan, Huizhou, Zhuhai, Zhongshan, Chaozhou and other places began to implement peak load shifting.
On May 18, Shantou City, Guangdong Province began to implement the orderly power use of "five stop two". Industrial users need to take a two-day off from Tuesday, the benchmark day, and stop production power consumption at 9-12, 14-17 and 18-21 hours in peak hours of power consumption, and only the security heat preservation load is reserved.
Guangdong power grid Dongguan Humen Power Supply Bureau issued a document on May 19 saying that the customers of the industrial special transformer in the town need to implement the orderly power use plan from "six stops one" to "five stops two" from May to December. For enterprises who do not consciously implement orderly power consumption, 48 hours of power outage will be imposed.
On May 24, Guzhen Town, Zhongshan City, Guangdong Province began to implement the plan of "opening five and stopping two". According to the notice issued by Gusan village Party and mass service center of Gugu Town, from now on, the day of peak load shifting power failure is Sunday every week, and the power transmission will be stopped from 7:00 to 23:00 every Sunday morning, and the elevator may not be used.
In addition, even if some industrial users have electricity during peak load shifting period, they can not use it for production and work, and can not operate high-power electrical appliances, such as air conditioners.
Since 2014, China's economy has entered a new normal, the growth rate of electricity demand has slowed down, and electricity rationing has been less frequent. Even if it appears, it is mostly in the peak period of power consumption from July to August. Why did it come to may earlier this year?
Zeng Ming, director of the energy Internet research center of North China Electric Power University, told interface news that there are four deep-seated reasons.
The first reason is that the power consumption planning is not accurate, which leads to the deviation of power demand arrangement on the power supply side; The second reason is that climate factors have a great impact on the demand for electricity. The high temperature weather in Guangdong has led to a significant increase in peak valley load compared with the past. "Lack of electricity is a lack of peak load."
The third reason is that in recent years, due to the great compression of coal-fired power, the multi energy complementarity between renewable energy and traditional energy is not coordinated, which leads to power shortage. The fourth reason is that most of the power in Guangdong depends on foreign power, and this year's foreign power may deviate from the original plan.
According to the information from Guangdong power trading center, according to the historical data of the 13th five year plan, may of each year is in the alternate period of dry season and flood season. The main clean energy hydropower generation capacity is limited, and the superposed unit maintenance and engineering blackout are relatively concentrated. In fact, it is the month with the smallest annual supply margin.
From June to September, the peak period of summer is coming, and the system load reaches the highest value of the year. However, hydropower also enters into the full year, and the bidding space of units in the market is reduced.
But this year, Guangdong Province entered summer ahead of schedule. Guangdong Energy Bureau reported on May 21 that since May, Guangdong Province has been experiencing a high temperature of 35 ℃, which is 4 ℃ higher than that of the same period last year. As a result, the demand for electricity has been rising, exceeding the maximum load of last year.
Meanwhile, the economic recovery accelerated, especially the demand for electricity for the second and third industries was strong. From January to April, the electricity consumption of the province increased by 32.2% and 40.2% respectively from the same period of the same period.
On May 10, the "plan for orderly power use of Guangzhou in 2021" approved by Guangzhou Bureau of industry and information technology showed that the power supply of Guangdong Province is expected to be tight in 2021.
Among them, the situation of power supply and demand in the province is severe during the alternation of dry flood and peak summer, which has a great risk of staggering peak and limiting power. Affected by this, Guangzhou power grid or power supply tension or even shortage situation.
According to the research data of Guotai Junan Securities, as of 2018, the proportion of external electricity in Guangdong also exceeded 30%. Among them, Yunnan hydropower is a major power source.
However, in May this year, due to the fact that Yunnan has not entered the flood season and other reasons, there is a power shortage in Yunnan itself, which leads to the failure of power transmission in Western China during the period of tight power supply in Guangdong.
Yunnan power grid issued a pre notice of emergency peak shifting preparation on May 10, which showed that at present, the main reservoirs in Yunnan are overdrawn seriously, the coal storage of thermal power continues to decline, the power generation is seriously less than expected, and there is a power shortage of about 700000 kilowatts at the peak of power consumption on that day.
The dry and wet seasons are distinct in most areas of Yunnan. The dry season is from November to next April, and the rainy season begins around May. According to the China Meteorological Administration, the flood season in southern China is late this year, with less precipitation in Yunnan in May. Recently, Lijiang City, Yuxi City and other places in Yunnan Province have issued orange drought warning.
In view of the power shortage and peak load shifting in Guangdong, the relevant staff of China Southern Power Grid Co., Ltd. (hereinafter referred to as China Southern Power Grid) were contacted by the interface news, but the person did not give a direct response.
Established in 2002, China Southern Power Grid is responsible for the power supply and service of Guangdong, Guangxi, Yunnan, Guizhou and Hainan.
Due to the large power supply load gap, many industrial zones in Guangdong Province shut down and stopped production in turn, and started off off peak power consumption to deal with the power supply problem.
Affected by the acceleration of economic recovery and the continuous high temperature, the demand for electricity in Guangdong Province is rising. Some areas in Guangdong have started off peak load shifting mode, and some enterprises in Zhongshan have coped with the difficulties by purchasing generators and adjusting working hours, Zhongshan Daily reported on May 26.
"Zhongshan daily" quoted a staff member of Chaozhou Power Supply Bureau as saying that the current load growth in some areas is far beyond expectations, and the power supply is tight or even insufficient at peak hours. If the power supply is overloaded, "the line is easy to collapse, resulting in a large area of Load Tripping and blackout, so some users need to cooperate with peak load shifting control".
Peak load shifting refers to a series of measures to guide users to adjust production arrangements to solve the short-term imbalance of power load, so as to transfer part of the load during the peak period of power consumption to the low period of power consumption, so as to reduce the peak and valley load difference of power grid.
According to interface news, peak load shifting has been in Guangdong Province for two weeks. By the end of May, the situation of power rationing continued to worsen, the scope expanded and the time extended. Some local factories had been open for three times and shut down for four times, which had a negative impact on the factory's order fulfillment. Workers could only be arranged to work in shifts in the morning and evening on the date of normal power supply.
On May 14, a manufacturer of kitchen utensils and equipment in Panyu District of Guangzhou City disclosed a notice of off peak power consumption. According to the notice, at the request of the superior power supply bureau, off peak power consumption will be implemented every Saturday from May 16, and normal work will be done on Sunday. The off peak power consumption cycle is expected to last for three months.
Subsequently, Foshan, Shantou, Dongguan, Huizhou, Zhuhai, Zhongshan, Chaozhou and other places began to implement peak load shifting.
On May 18, Shantou City, Guangdong Province began to implement the orderly power use of "five stop two". Industrial users need to take a two-day off from Tuesday, the benchmark day, and stop production power consumption at 9-12, 14-17 and 18-21 hours in peak hours of power consumption, and only the security heat preservation load is reserved.
Guangdong power grid Dongguan Humen Power Supply Bureau issued a document on May 19 saying that the customers of the industrial special transformer in the town need to implement the orderly power use plan from "six stops one" to "five stops two" from May to December. For enterprises who do not consciously implement orderly power consumption, 48 hours of power outage will be imposed.
On May 24, Guzhen Town, Zhongshan City, Guangdong Province began to implement the plan of "opening five and stopping two". According to the notice issued by Gusan village Party and mass service center of Gugu Town, from now on, the day of peak load shifting power failure is Sunday every week, and the power transmission will be stopped from 7:00 to 23:00 every Sunday morning, and the elevator may not be used.
In addition, even if some industrial users have electricity during peak load shifting period, they can not use it for production and work, and can not operate high-power electrical appliances, such as air conditioners.
Since 2014, China's economy has entered a new normal, the growth rate of electricity demand has slowed down, and electricity rationing has been less frequent. Even if it appears, it is mostly in the peak period of power consumption from July to August. Why did it come to may earlier this year?
Zeng Ming, director of the energy Internet research center of North China Electric Power University, told interface news that there are four deep-seated reasons.
The first reason is that the power consumption planning is not accurate, which leads to the deviation of power demand arrangement on the power supply side; The second reason is that climate factors have a great impact on the demand for electricity. The high temperature weather in Guangdong has led to a significant increase in peak valley load compared with the past. "Lack of electricity is a lack of peak load."
The third reason is that in recent years, due to the great compression of coal-fired power, the multi energy complementarity between renewable energy and traditional energy is not coordinated, which leads to power shortage. The fourth reason is that most of the power in Guangdong depends on foreign power, and this year's foreign power may deviate from the original plan.
According to the information from Guangdong power trading center, according to the historical data of the 13th five year plan, may of each year is in the alternate period of dry season and flood season. The main clean energy hydropower generation capacity is limited, and the superposed unit maintenance and engineering blackout are relatively concentrated. In fact, it is the month with the smallest annual supply margin.
From June to September, the peak period of summer is coming, and the system load reaches the highest value of the year. However, hydropower also enters into the full year, and the bidding space of units in the market is reduced.
But this year, Guangdong Province entered summer ahead of schedule. Guangdong Energy Bureau reported on May 21 that since May, Guangdong Province has been experiencing a high temperature of 35 ℃, which is 4 ℃ higher than that of the same period last year. As a result, the demand for electricity has been rising, exceeding the maximum load of last year.
Meanwhile, the economic recovery accelerated, especially the demand for electricity for the second and third industries was strong. From January to April, the electricity consumption of the province increased by 32.2% and 40.2% respectively from the same period of the same period.
On May 10, the "plan for orderly power use of Guangzhou in 2021" approved by Guangzhou Bureau of industry and information technology showed that the power supply of Guangdong Province is expected to be tight in 2021.
Among them, the situation of power supply and demand in the province is severe during the alternation of dry flood and peak summer, which has a great risk of staggering peak and limiting power. Affected by this, Guangzhou power grid or power supply tension or even shortage situation.
According to the research data of Guotai Junan Securities, as of 2018, the proportion of external electricity in Guangdong also exceeded 30%. Among them, Yunnan hydropower is a major power source.
However, in May this year, due to the fact that Yunnan has not entered the flood season and other reasons, there is a power shortage in Yunnan itself, which leads to the failure of power transmission in Western China during the period of tight power supply in Guangdong.
Yunnan power grid issued a pre notice of emergency peak shifting preparation on May 10, which showed that at present, the main reservoirs in Yunnan are overdrawn seriously, the coal storage of thermal power continues to decline, the power generation is seriously less than expected, and there is a power shortage of about 700000 kilowatts at the peak of power consumption on that day.
The dry and wet seasons are distinct in most areas of Yunnan. The dry season is from November to next April, and the rainy season begins around May. According to the China Meteorological Administration, the flood season in southern China is late this year, with less precipitation in Yunnan in May. Recently, Lijiang City, Yuxi City and other places in Yunnan Province have issued orange drought warning.
In view of the power shortage and peak load shifting in Guangdong, the relevant staff of China Southern Power Grid Co., Ltd. (hereinafter referred to as China Southern Power Grid) were contacted by the interface news, but the person did not give a direct response.
Established in 2002, China Southern Power Grid is responsible for the power supply and service of Guangdong, Guangxi, Yunnan, Guizhou and Hainan.