Poor transmission channels: coexistence of "electric shortage" and "electricity"

At present, the phenomenon of electricity shortage in our country is becoming more and more normal and spreading to the whole country. The unanimous judgment of the power supply and demand situation in all walks of life is that the most serious power shortage in the past seven years has occurred on the premise that the power supply and demand are “overall balanced”. Among them, the problem of poor transmission channels across regions is accompanied by an increase in the "electricity shortage" that has been prominent in appeals, queries, and arguments year after year. Clearing the obstacles of the system and opening up the "blocking" of trans-regional transmission is a matter of no delay.

Power shortage of 30 million, idle 45 million: “electricity shortage” under the cover of the power capacity waste shocking State Grid Corporation of China data show that during peak summer this year, North China, East China, Central China power grid gap of 30 million kilowatts, and the Northeast, The northwestern power grid has a surplus of 27 million kilowatts of electric power, and there is a coexistence of "deficient power supply" and "delivering end-use electricity." In addition, according to statistics from the State Electricity Regulatory Commission, affected by the loss of power coal supplies and power generation companies, the nationwide coal-mining downtime since September has been more than 10 million kilowatts, and the maximum coal-mining downtime has reached 15.88 million kilowatts.

The above-mentioned coal-mining downtime installed capacity and the installed capacity of “Ningbo” both amounted to about 37 million kilowatts. If we add Inner Mongolia’s Inner Mongolia’s Mengxi Power Grid, which is more serious than Wowo, the surplus power exceeds 45 million kilowatts, which is the maximum 50 million kilowatts is enough to make up for the current power shortage in our country. Calculated at an investment of 3,500 yuan per kilowatt, these idle power generation capacity will require investment of at least 150 billion yuan.

Inner Mongolia is the country with the fastest growth in installed capacity of thermal power in the country and has the largest total volume. Up to now, Inner Mongolia has a total installed capacity of about 70 million kilowatts, ranking first in the country. However, as the country’s largest power transmission base, Inner Mongolia’s western power grid has been continuously 6 years have not built a delivery channel. The reporter learned from an interview with the Inner Mongolia Electric Power Company that only the eight coalition power grids in the power supply business area of ​​Mengxi Power Grid have idle power generation capacity of more than 10 million kilowatts, including a large number of wind turbine generators that do not use white air. The loan interest from idleness exceeds 2 billion yuan.

Qi Laisheng, general manager of Longyuan Power Co., Ltd., said that Longyuan Power has installed 700,000 kilowatts of wind power in the power grid area of ​​Inner Mongolia Power Grid. If it is not restricted, it can generate 1.5 billion kwh of electricity in the year, and the actual amount of electricity generated is only 1.3 billion. In kWh, the loss of profits is 100 million yuan. With the advent of the winter heating period, in order to ensure the operation of cogeneration units, the issue of “disposal” of wind power will become more prominent.

The phenomenon of "electricity power" in the Ningxia Hui Autonomous Region has also become more and more serious. Cui Jifeng, General Manager of Ningxia Electric Power Co., Ltd., said that at present, Ningdong Coal and Electricity Base is still accelerating development and construction, and the main power projects under construction will be put into production this year. The total installed capacity of electric power in the region will reach 19 million kilowatts. With the power supply to Shandong, the installed capacity will be 7 million kilowatts.

In addition to the idleness of equipment, the waste in the use of electricity in areas where there is no shortage of electricity is equally alarming. The reporter learned that in order to solve the "electricity problem", some local governments have promoted surplus power to "digest in place," which objectively stimulated the development of high-energy-consuming industries. In the first three quarters of this year, the growth rates of electricity consumption in a group of "electricity" provinces such as Inner Mongolia, Ningxia and Gansu exceeded the national average for electricity consumption growth. The provinces with the highest growth rates reached 28.6%, which is 17% higher than the national average. In the first half of this year, the electricity consumption per million yuan of GDP in the western region reached 1,362 kwh, which was 478.7 kwh higher than that of the eastern region. Affected by the rebound in the high-energy-consuming industries, the power consumption per unit of GDP in the western region did not fall, but rose by 1.54% in the first half of the year.

"The gap between the surplus and the deficit", "Yuyu interconnection", "the lack of interconnection", and the "unconnectedness": the phenomenon of "disorder" in the power channel is worrying. In recent years, in order to "buy electricity", leaders of provinces such as Beijing, Shanghai, and Shandong lacked electricity. They all ran to Inner Mongolia and the two sides signed a power transmission agreement. However, because they could not be implemented into a piece of paper, in order to “sell electricity,” the Inner Mongolia delegation’s proposal at the Fourth Session of the Eleventh National People’s Congress suggested that the power of Inner Mongolia should be accelerated. As for the construction of the channel, as in previous years, this appeal has been heard in the ups and downs, and the attention of various sectors of the society has come to an end.

While the construction of a transmission channel deemed by the two remaining parties to be “a straw for survival” is far from being completed, other trans-regional transmission channel projects that are not “emergency” have been launched quickly and smoothly. In August 2006, the 1 million-volt AC UHV pilot demonstration project from Shanxi to Hubei was approved, and construction started in the month and was put into operation 28 months later. The transmission project with more than 5 billion yuan in investment has been operating in the past three years. It has not played a role in the increasingly fierce "half of the electricity shortage and half of the electricity shortage". Shanxi Province, like Hubei Province, is the country's most serious power shortage. One of the provinces, no extra electricity available for delivery. Some people in the industry lamented that the “one millionth volt power transmission line in the world” built by China has almost become a display.

Similar to the channels linking the two areas of power shortage, some new cross-regional power transmission projects connect two areas with the same power surplus. In September 2010, the investment of more than RMB 6 billion and the ±500 kV DC project linking Inner Mongolia Hulun Buir and Liaoning were completed and put into operation. Each year, 18 billion kilowatt-hours of electricity can be transferred to the load center in the Northeast. However, as the target market for the northeast electricity market exceeds supply, the annual utilization hours of generator sets have been decreasing year by year.

In addition to the lagging project construction and the “no use of land” for new construction, the “unconnected” phenomenon of cross-regional transmission is even more profound. When interviewed by a number of power generation enterprises that were commissioned by Mengxi Power Grid, the reporter saw a notice from a power grid company: From July 1, North China Power Grid cancelled the temporary transaction of the transmission power from Mengxi Power Grid and sent it out. significantly reduce. According to the person in charge of the Inner Mongolia Electric Power Company, Mengxi Power Grid sent power to the North China Power Grid through two channels of four 500 kilovolt lines, with a maximum power transmission capacity of 4.3 million kilowatts, and a slight technological transformation of 4.9 million kilowatts. After the implementation of the notification, the delivery trend has dropped to a minimum of 1.975 million kilowatts and the capacity has been idled to more than 2 million kilowatts.

While reducing the power transmission from the Mengxi Power Grid to the North China Power Grid, the power shortage in the North China Power Grid is even more severe. According to the comprehensive judgment of the State Grid, during the peak winter period, the company's operating area has a maximum power shortage of about 28 million kilowatts, including the 4.5 million kilowatts of North China Power Grid. If the contradiction between the supply and demand of thermal coal is further aggravated and continuous extreme cold weather occurs, the power gap will further increase. Increase.

Mechanical Cable Terminals are designed for use in low and medium voltage applications. Only three sizes cover conductor sizes from 25 mm2 to 400 mm2. All products consist of a tin-plated body, shear-head bolts and inserts for small conductor sizes. Mechanical Cable Terminals bodies are made of a high-tensile, tin-plated aluminium alloy. The internal surfaces of the Mechanical Cable Lug holes are grooved. Mechanical Cable Terminals are chamfered at the edges and available with or without oil barrier (as blocked and unblocked types) depending on the appli cation requirements. Lugs are suitable for outdoor and indoor applications and are available with different palm hole sizes

Bolt Type Aluminum Alloy Cable Terminal

Mechanical Cable Terminal

Mechanical Cable Terminal,Mechanical Copper Cable Terminal,Mechanical Bimetal Lug Cable Terminal,Mechanical Cable Lug,Electric Cable Connectors

Jiangsu Chuandu Electrical Technology Co.,Ltd. , http://www.cdepf.com

Posted on