In the photovoltaic industry, what is "abandoning light and limiting electricity"?

Abandoning light and giving up the electric energy of photovoltaic power generation generally means that the photovoltaic system is not allowed to be connected to the grid, because the electric energy generated by the photovoltaic system is constantly changing under the influence of the environment and is not a stable power supply. Power grid operators refused to connect the photovoltaic system to the grid for this reason.

Power rationing, limiting power output, generally refers to limiting the power generation of photovoltaic or wind power for the safety management of power grid. For example, a power station with rated power of 100MWp is only allowed to generate 80MWp due to dispatching needs, and the other 20MW is constrained and cannot be operated at full load.

Extended data:

With the increase of photovoltaic power generation, the generation hours of coal-fired units will inevitably decrease, and the cost of transmission lines will also increase. The huge expenses caused by these changes also need to be taken into account. Due to the strong fluctuation of photoelectricity, there is no way to generate as much electricity as users need, and only so much electricity as users need. There must be a preferential electricity price system to encourage users to use electricity, otherwise it will seem to be "abandoning the wind."

In fact, "abandoning light" has already appeared. Statistics from the National Energy Administration show that in the first half of 20 15, the cumulative photovoltaic power generation in China was1900 million kwh, but the "abandoned light" power reached1800 million kwh. By region, the "abandoned light" electricity in Gansu Province is110.40 billion kWh, and the "abandoned light rate" is 28%. The electricity consumption of light waste in Xinjiang is 54 1 10,000 kwh and the light waste rate is 19%.

In the development of photovoltaic industry, the biggest problem is how to absorb fluctuating photoelectricity. Germany's 20-year energy transformation is trying to solve this problem. Only by effectively solving the problem of "abandoning light" can China's photovoltaic industry usher in a real spring.

Solving the problem of "light abandonment" requires overall planning. The west is not only a place where solar energy is concentrated, but also a place where wind energy is concentrated. Wind energy is often the peak of its production at night, and it is also of positive significance to coordinate the production fluctuations of the two. Measures to digest production capacity on the spot, such as "wind energy heating" piloted in some areas, are also a response to the "waste light" of photovoltaic power plants.

References:

Photovoltaic-Baidu encyclopedia