Energy storage technology will solve the problem of renewable energy curtailment of wind and light

With the rapid development of renewable energy, the dilemma of abandoning wind and light still exists
.
In order to solve this dilemma, it is necessary to solve the problem of transportation and consumption
through government coordination.
In addition, technological innovation and changes in the development model of renewable energy are needed to truly solve the problem
of wind and light abandonment at the lowest cost.
Due to cost and technical problems, it is difficult for the grid to absorb renewable energy on a large scale, that is, if there is no energy storage technology, renewable energy alone will not go far
.

For renewable energy power generation companies, it is also very difficult
to rely on energy storage to obtain revenue.
At present, the on-grid price of wind power is about 0.
51-0.
61 yuan per kWh, and the on-grid price of photovoltaic power generation is 0.
8-1.
1 yuan
per kWh.
Due to the limited capacity of the power grid, there has been a large-scale abandonment of wind and light
in many areas.
So there are plans to use energy storage systems to store excess electricity
.
Although the marginal charging cost of storing this part of the abandoned wind and light is close to zero, because the cost of using the energy storage system needs 1 yuan per kWh, it is indeed quite difficult
to achieve profitability in the case of the existing on-grid tariff.

In theory, as long as the cost of microgrids can be lower than the terminal electricity price, it should be economically feasible
.
According to the "2014 Renewable Energy Generation Cost" issued by the International Renewable Energy Agency, the current energy storage cost is 1 yuan
per kWh.
According to the cost reduction rate of renewable energy and energy storage technologies in recent years, microgrids seem to be not far from realizing applications in terms of cost
.
Therefore, microgrids may still be a certain distance from realizing applications, but they are not out of reach
.

It is understood that in the selection of energy storage technology path, the most potential is currently lithium batteries
.
Pumped water storage and compressed air energy storage are limited by geographical conditions and cannot be applied to independent microgrids
.
Moreover, the energy conversion efficiency of these two energy storage technologies is not high, and there will be high power loss
during use.
Among several battery energy storage technologies, lithium batteries benefit from high energy conversion efficiency and the lowest negative externalities during use, and the energy density and conversion efficiency of other types of batteries are difficult to be higher than lithium batteries
.
Therefore, in the path selection of energy storage technology, lithium batteries have obvious advantages
.