Method for optimizing new energy capacity ratio in layers in power grid

Abstract

The invention discloses a method for optimizing the new energy capacity ratio in layers in a power grid. The method comprises the steps that iteration calculation is conducted on the inner layer and the outer layer, a calculation model is that time series modeling is conducted on output force of the inner layer on the basis that the characteristics of new energy of a region are considered, the optimal energy-saving emission reduction benefit of the power grid serves as a goal, the factors such as the load characteristic, the unit peak shaving characteristic and the thermoelectricity coupling characteristics of heat supply units of different types are comprehensively considered, and therefore an annual time series production analog simulation model related to new energy power generation is established; the outer layer is provided with a capacity ratio optimizing model, the energy-saving emission reduction benefit of the model of the inner layer serves as a fitness function, so that the individual optimizing direction is updated, the new energy power generation ratio capacity is determined, the blindness of random generation of new energy installed capacity is reduced, and the optimizing efficiency and the accuracy are improved. The method for optimizing the new energy capacity ratio in layers in the power grid can be applied to new energy capacity optimization of the province-level power grid and has important guiding significance in grid source planning and practical power system dispatch of the province (region) power grid with the requirements for new energy installed capacity planning and low carbon electric power.

Description

technical field [0001] The invention relates to a method for optimizing the ratio of new energy capacity in a power grid, in particular to a method for hierarchically optimizing the ratio of new energy capacity in a power grid, and belongs to the technical field of energy saving and emission reduction. Background technique [0002] The low-carbonization of the power industry is the key to coping with global warming and realizing the sustainable development of my country's social economy. In this context, China has launched a series of energy development policies to encourage the large-scale development and utilization of renewable energy, especially wind and solar resources. After the rapid development of the wind power industry, in recent years there has been an upsurge in the development of the solar energy industry. Many new energy power generation provinces have planned large-capacity wind power and solar power generation at the same time. Extensive planning is carried ...

AI Technical Summary

Problems solved by technology

However, in the process of establishing the mathematical model, the start-up and shutdown characteristics of the conventional unit and the thermoelectric coupling characteristics of the heating unit are not considered, resulting in a large deviation between the operation results of the conventional unit and the actual power system, which affects the reliability of the calculation results of the wind-solar ratio. Credibility

[0004] To sum up, the existing methods mostly use the power balance method based on typical days, which gives the new energy power generation balance in the most serious situation, which cannot reflect the daily wind power and photovoltaic output characteristics and how the entire network should be optimized. Unit start-stop and maintenance arrangements, and the modeling of grid production simulation is not considered comprehensive enough

If it is used to guide the planning of wind power and photovoltaic installed capacity, the calculation results will be too conservative, which is not conducive to improving the energy saving and emission reduction benefits of the power grid

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