How the grid promotes the development of renewable energy

If the delivery path to the renewable energy base is not perfect, the electricity can not be delivered because the load level and system capacity of the local power grid cannot be fully accepted.

The development of renewable energy such as photovoltaics is a common choice of the world, but from the perspective of the electric power industry, this traditional industry, which has been operating for more than 100 years, is therefore facing new challenges.

Wind power, solar power generation bases, etc. are generally far away from power load centers, and are located in places where power grids are relatively weak. From a variety of perspectives, power grid construction must be strengthened. The load center can develop some distributed photovoltaics, but it is also very important to strengthen the distribution network and technological innovation accordingly. In the face of the general trend of energy transformation, in terms of the positioning of the development function of the power grid, it is actually far more than just an intermediate link between power supply and customers, but a strategic platform for optimal allocation of social resources. This is reflected in the following Aspects:

The first is an important platform for energy conversion and utilization. The further use of renewable energy such as solar energy and wind energy is mainly converted to electricity. Traditional energy resources, such as coal, need to be converted to electricity if they are to be used more efficiently and energy-efficiently. Therefore, in the entire energy conversion and utilization, the proportion of resources for power generation should be greatly increased. In such an energy structure, the power system including the power grid plays a very important role.

The second is a platform for optimizing the allocation of resources on a large scale. In addition to the greater power market, the stronger the configuration capabilities, the power system also has a very important feature is the instantaneous balance. If you have a large enough system range, you can better balance supply and demand. At the same time, for unstable energy such as solar energy and wind power, it is also possible to achieve a smoother output between time and space within a large-scale power system. This is a unique feature of the power system.

The third is the only physical trading platform in the electricity market. It is an important foundation for realizing public participation and market vitality. Nowadays, electricity customers can enter the electricity system as producers and sellers. If there is no safe, reliable, and capable power grid system, this is very difficult to achieve.

The fourth is a comprehensive energy service platform. The next step in the development and utilization of energy will show an integration trend, and energy and supply systems will be more integrated in all aspects. For example, the emergence of electric vehicles has increased the power industry's responsibility for the supply of electricity in the transportation sector. This involves the issue of how to better integrate the power supply system and the oil and gas supply pipeline.

In fact, we can think that the gathering point of energy green transformation and utilization is the power grid. Then, how does the grid promote the green transformation of energy and promote the development of renewable energy such as photovoltaics? We feel we should work hard from these three aspects.

First, do a good job as a staff officer in the power industry development planning. The power system is the most complex technology-intensive system in human society. Its development is not simply to group together various components, but it is necessary to target long-term economy and meet the requirements of national energy strategy adjustment. We need to better match the power supply layout with the power grid construction and let reliable technical solutions land. This involves how the system's power generation technology should be integrated, not only considering coal, oil, gas, and nuclear power, but also the characteristics of renewable energy sources, and more importantly, the characteristics of the instantaneous balance of the power system. The structure of the base load, waist load, and peak load that are guaranteed and more cost-effective.

The country now proposes that the newly installed photovoltaic capacity in 2014 will reach 14 million kilowatts. In order to achieve this goal, we need to consider how to lay out a low-cost way to supply electricity to society. It is necessary to strengthen the construction of some project channels for on-grid access and renewable energy bases. Because "on-grid connection" does not mean "absorption", everything that is connected to the grid system does not mean that all particles can be received. If the delivery path to the renewable energy base is not perfect, the electricity can not be delivered because the load level and system capacity of the local power grid cannot be fully accepted.

In addition, the fluctuating power supply needs to form a coordinated development pattern with conventional power supplies, especially conventional power supplies with adjustable capabilities. At this stage, renewable energy sources and conventional power sources cannot completely replace each other, but they can form complementary advantages. The renewable energy output is not so stable. We must better connect the power grid acceptance capacity and renewable energy development goals.

The second is to manage the power production system. In any power blackout accident at home and abroad, the power equipment industry’s own equipment losses are far lower than the social losses caused by power outages. Therefore, ensuring the safe and reliable operation of the entire system is the responsibility of more than anything else. This must be ensured by technical standards and operational management specifications. In particular, there must be some basic technical requirements for the power supply that is connected to the power system. For example, photovoltaics have no problem in accessing the power grid when the capacity is small, but when the proportion is large enough, the power dispatching operation management must be adjustable and controllable.

The third is to do a good job of the new market pattern and market-oriented development. With the advent of distributed power, consumers are no longer simply consumers, but also producers. In the future market structure, the relevance of the entire power system is to re-frame the decision-making orientation. These are to be achieved through business model innovation.

I think the future development of the power grid is very clear, that is, it must have a strong power transmission and distribution capabilities, flexible and interactive service capabilities and a strong accident or disaster resilience. Therefore, first of all, we must strengthen the intelligence of the power grid, enhance the acceptance capacity of new energy and diversified service capabilities. Second, change the way of power consumption, especially after the emergence of power producers and salesmen, how to establish new interest patterns, value mechanisms and business models, and how to form a complementary and competitive pattern among energy varieties. Again, we must have more advanced technology and management concepts. Large-scale, high-renew-rate renewable energy sources are integrated into the grid. In the long run, technology is not a problem. However, in the current existing power system architecture, if some technologies are not in place, it is very difficult to operate the system. Therefore, we must strengthen the prediction of the output of renewable energy, make it testable, adjustable, and controllable. In terms of power grids, we need to increase efforts in transmission, intelligent control, and dispatch, and we must also make good use of energy storage technologies and communications. Technology, sensor technology and other technical support.

All in all, from the grid point of view, we have the responsibility to assist the government in creating an industry ecosystem conducive to the sustainable development of renewable energy sources and various power sources.