The "Notice on the Action Plan for Carbon Peaking Before 2030" issued by the State Council pointed out that the active development of solar thermal power generation and the establishment of a wind and solar integrated renewable energy power generation base with complementary adjustment of solar thermal power generation, photovoltaic power generation and wind power indicate that the national With strong support for the concept of CSP +, "CSP + multi-energy complementarity" has entered a period of rapid development and set sail with great momentum.

Hui Chao, deputy general manager of Shouhang Hi-Tech, made a keynote report on "Analysis and Suggestions on Configuration of Multi-Energy Complementary, Photovoltaic + Solar Thermal Projects" at the 2022 China Wind-Solar Complementary New Energy Base Development Conference.

The report pointed out that while the power generation scale of solar power and wind power has been expanding, they have also become an important part of the power structure.

The complementarity of wind and light in the year and the difference in output characteristics exist. The light is better in summer, and the wind is better in spring and autumn and winter, and there is a strong complementarity in the year.

The complementarity of wind and light in the day is mainly that the light is better during the day, and the wind output is larger in the morning and evening and at night. The complementarity is mainly to play the flexible adjustment role of solar thermal and energy storage, and increase the flexible adjustment ability of the project.

CSP has become an important direction for the development of new energy energy storage technology, with multiple functions such as power generation, energy storage, and adjustment.

In this context, promoting a variety of power supply complementarity, photovoltaic + solar thermal and other configurations can not occupy system adjustment resources, while wind and solar complementation can improve the comprehensive output characteristics of new energy, and give full play to the flexible adjustment role of solar thermal and energy storage to improve project flexibility Adjustment ability.

The following are photovoltaic 900MW, photovoltaic 900MW + energy storage battery 180MW/720MWh, photovoltaic 900MW + tower molten salt 100MW, photovoltaic 900MW + trough heat transfer oil 100MW, photovoltaic 900MW + energy storage battery 180MW/720MWh + tower molten salt 100MW, photovoltaic 900MW + tower molten salt One-by-one analysis of the combination and configuration of different energy storage methods such as 100MW+ electricity-disabled heating 40MW, photovoltaic 900MW+ energy storage battery 180MW/720MWh+ tower molten salt 100MW+ electricity-disabled heating 40MW, etc.

From the perspective of combination, the capacity factor of CSP station can reach 28.7%, which is the highest. With the increase of the combination method, the combination of photovoltaic + battery + solar thermal + power abandonment, the capacity factor is only 19.6% in the comparison of these schemes. It shows that the more the combination is, the more the regulating ability that does not generate electricity itself participates, the capacity factor of the whole system is decreasing, and the decrease of the capacity factor also means that the benefit of the whole combination is decreasing.

Suggest

The solar thermal power station has the characteristics of energy storage and peak shaving. Its value is not only the value of clean energy, but also realizes the core value of its own energy storage and peak shaving by providing services for the wind-solar thermal storage base!

Due to the differences in solar energy, wind energy resources, electricity prices and electricity consumption in different regions, it is necessary to comprehensively consider the scale ratio of wind power, photovoltaics, and solar thermal, as well as the configuration scale of concentrating heat collection and heat storage systems, and improve the joint operation plan. It may match the load curve of the power system in the power consumption area to reduce the peak load regulation of the power system.

It is necessary not only to pursue technical complementarity, but also to meet economic complementarity, and appropriately increase the scale of new energy indicators for solar thermal power generation; promote the implementation of energy storage tariffs and auxiliary market service reforms; improve the benchmark rate of return for project investment evaluation and increase projects. practicability. Editor/He Yuting