NEC R & D PV output suppression minimization technology
NEC and other development control technology, the output of photovoltaic power generation to minimize inhibition. NEC announced on August 24 that it has developed a technology that will minimize the output suppression of photovoltaic power generation. It is jointly developed with Professor Toshio Ogabatsu of Institute of Production Technology, University of Tokyo and Chihiro Ikegami, associate professor of Tokyo University of Agriculture and Technology.
To minimize the amount of output suppression, according to the power plant to distribute the amount of restraint
At present, it is very difficult to accurately predict the amount of power generated by photovoltaic power generation. In order to effectively achieve the balance between power supply and demand, the issue of excessive output suppression required by power companies for power generation companies has become a subject.
In addition, there is also a demand for fair control of the amount of output suppression impartially by the generation operator. This technique can be a solution to these problems and to minimize the output suppression of photovoltaic power generation.
The technology developed this time can predict the amount of electric power of photovoltaic power generation with high accuracy, and grasp the deviation of the predicted value. As a result, the minimum output suppression amount allocated to each generation operator can be calculated, thereby reducing the over-suppression.
In addition, the climatic conditions and restraint history of the PV power plant installation site can also be taken into account, and the output restraint amount can be allocated fairly. It is possible to finely allocate the output suppression amount to each generation operator to achieve fair output suppression between power generation operators.
A review of the technology developed, using power system operation analysis techniques, found that although the number of days to be suppressed was increased compared to previous methods, the output suppression could be reduced to two thirds.
Allegedly, the use of the technology, photovoltaic power generation operators can minimize the loss of opportunities for sales, contribute to reducing the output suppression and fair distribution.
Like the weather forecast that "high probability of power generation forecast"
High-precision power generation forecasting is achieved by "high-confidence power generation forecasting" technology that uses autonomous indicators of meteorological conditions such as cloudiness and temperature, and gives a predictive probability similar to weather forecasting to power generation.
When predicting the reliability of the amount of electricity generated on the target day, attention is paid to the similarities between the past meteorological changes and the meteorological similarities are applied from the combination of thousands of meteorological conditions.
For example, the power generation amount at a predicted probability of 95% shows the lower limit output to the upper limit output in units of kW. This can grasp the predicted value of the upper and lower limits.
Since the deviation of the predicted value can be calculated, the power company and energy management service operator can set various control assumptions in the upper and lower limits so as to set a more reasonable output suppression amount and then distribute the power to each power station .
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