Yongjin Building 丨 hundreds of millions of kilowatts of power supply demand, how to pick up Zhejiang?

Zhejiang News Client reporter Zhang Fan

Continuous high temperature and drought have led to a general lack of electricity in the country.

Zhejiang is no exception, and the demand for electricity consumption in a province is equivalent to the entire South Korea. Whether the power supply in the province is enough, is there any foreign power supply? What is more important is whether there are new solutions?

How big is electricity?

In the past two days, the weak cold air that finally looked forward to letting Zhejiang Power Grid tight power supply pressure slowed a little breath.

Even so, at 13:25 in the afternoon on August 24th, the maximum load of Zhejiang Power Grid reached 93.98 million kilowatts, while the minimum load was the low temperature before the morning sunrise -78.19 million kilowatts at 5:28.

What is the concept of 93.98 million kilowatts? It is equivalent to four more than all units of the Three Gorges Power Station to open full horsepower. Only by serving in Zhejiang alone can it meet Zhejiang's demand for electricity.

Since entering August, the continuous high temperature has caused Zhejiang's power demand to increase, while Sichuan -Chongqing high temperature drought shortage in the surrounding provinces and the middle and upper reaches of the Yangtze River directly increases the power gap in Zhejiang, because most of them are the source of electricity sources in Zhejiang Province. And now some places are also suffering from high temperature deficiency.

Last year, Zhejiang Power Grid has exceeded 100 million kilowatts for the first time. Following Guangdong and Jiangsu, it became the third provincial power grid with a maximum load of more than 100 million.

On July 11 this year, the highest electricity load in Zhejiang Province reached 101.9 million kilowatts, a record high, an increase of 1.68 million kilowatts from last year. The tension of electricity is revealed.

In fact, the relevant parties at the beginning of the year predicted the possible power shortage.

At the report of the operation method of Zhejiang Power Grid in 2022, according to the calculation of the State Grid Zhejiang Power Company, the highest load in Zhejiang's whole society in 2022 will reach 106 million kilowatts.

Why, after entering August, the highest power supply load in Zhejiang is at the level of less than 100 million kilowatts, but the pressure lack of electricity is still?

The reason is that after the decline in external electricity in the province, Zhejiang's power supply capacity is insufficient. In order to ensure the safe operation of the power grid, orderly power consumption measures have been launched, and the maximum voltage has dropped by tens of millions of loads.

If the downside recovery data is added, the current maximum power supply load demand is close to the predicted 110 million kilowatts.

Where does it come from?

Inventory of Zhejiang Power, about 30 % from outside the province.

There are mainly hydropower, such as Xiluo, Three Gorges, and Baihetan, and coal power, photovoltaic and wind power from Ningxia, and transmitted to Zhejiang with a long -distance transmission of special high -voltage grids. However, in the construction of Baihe Beach, the electricity of the Three Gorges to Zhejiang is also limited.

In addition, there are parts distributed by East China Power Grid, Wan East Transmission, and buying electricity through the power market transaction. The farthest has been bought in Xinjiang and Tibet.

Let's take a look at the power supply in the province. It mainly relies on coal -fired generators. The installation of nearly 50 million kilowatts of coal power is the main force of Zhejiang power supply. There are also nuclear power, natural gas units and a small amount of hydropower as important supplements.

Among them, natural gas units can be generated at the peak, and hydropower is an important peak -regulating method.

In 2020, Zhejiang Power's total installed capacity reached 101.42 million kilowatts has become the fifth "installed 100 million" province (district) in the country. Photovoltaic and wind power growth has grown rapidly, currently about 20 million kilowatts. However, these new energy sources that are intermittent and see -through -see -in power are difficult to support the power grid to stabilize power supply. Although the installation is large and the power generation is limited, it can only be used as a supplement.

In terms of the performance of high temperature, heat and heat recently with photovoltaic power generation, the big sun is a great time for photovoltaic power generation. At the highest time, there are more than 10 million kilowatts of power generation for power, but only 5 or 6 hours a day can be issued. Essence

How to meet Zhejiang's power demand in the future?

It is definitely a way to open a new power supply to the Western and Northern Energy Concentrations.

Although this year's high temperature and drought, Sichuan and Chongqing hydropower came to Zhejiang, but opened a few more power points to diversify the source, which can hedge the risk of climate factors.

Relevant parties have been doing this work. A friend of Yong Jinjun was sent to Gansu to inspect, build, and acquire power projects there last year. In addition, the early stage of Gan Dian's entry into the Zhejiang Power Channel is also stepping up.

In the province's power installation construction, in the case of the restrictions on coal power due to dual -carbon, find a way to make large voltage, eliminate the capacity of the old coal electrical unit, develop a more environmentally friendly coal electrical unit, and actively develop clean coastal coastal coastal Nuclear power and natural gas units.

In particular, the natural gas units that can at the peak power generation can be used to use the LNG of the sea transportation and the existing natural gas pipe network reasonably, and it is limited by the requirements of dual carbon.

The development of new energy such as photovoltaic and wind power should use the advancement of power grid technology and the construction of energy storage facilities and pumping power storage power stations to resolve the shortcomings of unstable power supply.

Of course, the power supply to build a power consumption for one or two months of peak power consumption is not economical from the perspective of comprehensive use of resources. A large power plant and UHV transmission are tens of billions of yuan.

And from the main force of Zhejiang's self -power generation last year, the provincial coal -power enterprise coal -fired unit's annual power generation utilization hours are not high. It is generally only 5,000 hours, which is far lower than the annual utilization time of more than 6,000 hours when the electric shortage around the electric shortage around 2003. Essence

This shows that electricity missing is periodic.

Demand side, new solution?

In addition to the supply side, hundreds of millions of kilowatts of power supply in Zhejiang must also adopt various effective means to change demand methods and scientific management to play the maximum power supply benefits. This is called demand -side management in the power industry. In fact, the orderly power consumption implemented in Zhejiang a few days ago is a kind of demand -side management, which is nothing more than administrative means.

Since 2020, Zhejiang has been exploring more flexible and market -oriented demand -side management. One way is to build a demand -side response resource pool.

The market -oriented demand -side response is that power companies or power users have abandoned the load during the peak hours in exchange for compensation. For example, some companies discontinued production during the day during the day, produced at the low valley at night, and gave the load to the needs of the need. Users need to spend money to buy these peak loads.

Yong Jinjun has learned that at present, about 60,000 companies in the province have participated, and the load scale that the demand side responds to the timely calling ponds can be called 5 million kilowatts in time, ranking among the best in China.

According to the current regulations, the amount of load and power from the enterprise can receive a subsidy of up to 4 yuan per kWh, which is very attractive to many companies.

According to the relevant public announcement of the Zhejiang Development and Reform Commission, from February 1, 2021 to December 31, 2021, the demand for power demand was 67 times, and a total of 17,700 households participated in, and the peak load of the power grid was 3.91 million kilowatts, and the subsidy was about 22.8 million yuan ; From January 1, 2022 to July 15, 2022, the power demand response was 21 times, and a total of 142,900 households were participated. The cumulative peak load of the power grid was 36.41 million kilowatts, and the subsidy was about 207 million yuan.

It is reported that due to the expansion of the power supply gap in continuous and high temperature this year, only July to early August, the demand -side response resource pool was launched for 10 days, and the subsidy was as high as 700 million yuan.

On August 7, with the intensification of high temperatures and the decrease in provincial external electricity, the power supply gap expanded, the market -oriented demand side responding to the resource pool had to choose a suspension. The reason was that the subsidy cost was too high, and even the power company could not continue to maintain it.

On the other hand, the power gap is too large, which has far exceeded the demand side response to the resource pool with a response of 5 million kilowatts.

In fact, according to normal logic, under the circumstances of complete marketization, subsidies should be used for electricity users during peak hours, which means that they need to increase the electricity prices of these users. The larger the gap, the greater the electricity price increase.

At present, the demand -side pilot and electricity are in the peak of the summer. The government considers the development of people's livelihood and enterprises. The requirement is to keep the price of stable prices and the electricity price of electricity is impossible. Therefore The response enterprise was obtained, but the subsidy was that the government coordinated the account of the power grid enterprises.

Industry insiders said that in terms of technical point of view, there is no major obstacle to the operation of the resource pool of the power demand side. The market -oriented demand side response is very promising.

Regarding this method to solve the problem of power shortage, what do you read, you may wish to leave a message to communicate together.

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