New power system will bring “qualitative change”

New power system will bring “qualitative change”

Release Time : Dec-23-2021

How to understand the concept of “new power system with new energy as the main body”?

We know that the traditional power system is dominated by fossil energy. After more than one hundred years of continuous improvement, it has mature technologies in planning, operation, safety management, etc., reaching a very high level, ensuring reliable power supply. The new power system proposed now is a new power system with wind power, photovoltaic and other new energies as the main body, and coal power and other fossil energies as the auxiliary new power system. Earlier, it was proposed to “build a new power system that adapts to the development of a high proportion of renewable energy” and emphasized the supply. The subjectivity of energy tends to be more holistic. This is not only an improvement in “quantity”, but also a change in “quality”

What are the specific manifestations of this “qualitative” change?

The traditional power system uses a precise and controllable power generation system to match a basically measurable power consumption system. Mature technology can ensure the safe and reliable operation of the power system.

Taking new energy as the main body means that new energy will be connected to the grid on a large scale, and large-scale new energy power generation has random fluctuations, and the power generation output cannot be controlled on demand. At the same time, on the power consumption side, especially after a large number of distributed new energy sources are connected , The accuracy of power load forecasting has also dropped significantly, which means that random volatility appears on both the power generation side and the power consumption side, which will bring major challenges to the balance adjustment and flexible operation of the power system. The stability characteristics and safety control of the power system And the production model will be fundamentally changed.

New power systems need to cross-border integration in the technical field

What are the difficulties faced in constructing a new power system with new energy as the mainstay?

The difficulties are manifold. The first is the joint research on the technical level. It is necessary to establish a multi-dimensional and three-dimensional science and technology system under multi-disciplinary integration to achieve a high degree of integration of digital technology represented by “clouds, big things, smart chains” and advanced physical technologies in the energy field. This includes four aspects. One is the widespread access to a high proportion of new energy; the second is the flexible and reliable resource allocation of the power grid; the third is the interaction of multiple loads; the fourth is the integration of multiple networks of infrastructure, which is simply to achieve horizontal multi-energy complementation and vertical Source network load storage coordination.

The second is innovative breakthroughs at the management level. Taking the construction of the power market as an example, it is necessary to ensure the coordination between a series of auxiliary service markets and the main power market, including the coordination between the medium and long-term contract market and the spot market, and how the flexible resources of demand side response can be connected to the spot market.

In addition, new requirements have been put forward for the power market mechanism, and the government is also facing new challenges in terms of policy support, guidance, regulatory effectiveness and efficiency.

What challenges will power companies face?

The challenges faced by power companies, especially power grid companies, are huge. At present, the State Grid Corporation of China and China Southern Power Grid Corporation have introduced important measures to serve carbon peaking and carbon neutrality, and to build a new power system, including actively using the “big cloud mobile smart chain” technology to accelerate the upgrade of the power grid to the energy Internet and optimize grid dispatching And transaction mechanisms, etc., whose direction is global optimization to achieve the goals of clean, low-carbon, safe and controllable, flexible and efficient, open and interactive, and smart and friendly.

It will also bring challenges to new types of demand-side users such as integrated energy service companies and electric vehicle companies that are born under new business conditions. How to closely cooperate with power generation companies and energy-consuming companies to provide Electric power products and services and the promotion of all-round development of integrated energy services need to be explored.

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