Wind-solar-storage multi-energy complementary capacity optimization method considering installation scale constraint

Abstract

The invention relates to a wind-solar-storage multi-energy complementary capacity optimization method considering installation scale constraint. The method comprises the following steps: acquiring wind resource and solar resource data of a place where a project is located, output data of wind power and photovoltaic power generation under unit installed capacity at each moment in a year, historical load data and a daily minimum load rate value in the whole year; a wind-solar optimization complementary system; the wind-solar optimization and complementation system takes the total wind-solar installation scale as a constraint condition, wind power and photovoltaic power generation installation scales as variables, and smooth new energy joint output through wind-solar complementation characteristics as an optimization target, constructs a wind-solar complementation optimization model, and calculates the optimal wind power and photovoltaic power generation installation scale under wind-solar complementation; an energy storage capacity configuration system; and optimizing the energy storage capacity configuration scale and the configuration duration according to the energy storage capacity demand of each time period of the annual daily load valley period and the energy storage capacity demand of each day. According to the method, the wind power and photovoltaic power generation total installation constraint, the wind-solar complementary characteristic, the new energy development economy and the power grid friendliness can be comprehensively considered.

Description

technical field [0001] The invention relates to a capacity optimization method for wind-solar storage and multi-energy complementation considering the constraints of installed capacity, belonging to the technical field of wind-solar storage and multi-energy complementation. Background technique [0002] Wind power and photovoltaic power generation are intermittent power sources, and their output shows great uncertainty, volatility and randomness. When they are connected to the power grid on a large scale, it will have a certain impact on the power quality of the power system and affect the stability of the power grid. sturdiness and reliability. However, the output characteristics of wind power and photovoltaic power generation have the characteristics of seasonal complementarity and day and night complementarity. Reasonable adjustment of the wind power and photovoltaic capacity ratio will help to smooth the fluctuation of output power and slow down the impact of new energy ...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the existing research focuses on maximizing the total benefit after the optimization of the wind-solar-storage system, or on the goal of the combined output characteristics of wind-solar-storage storage following the load characteristics of the power system. The load characteristics of the power system are not considered enough to make the new energy output more grid-friendly; the latter focuses on the new energy output completely following the load characteristics of the power system, which will increase the investment and impact of the project on the construction of energy storage Insufficient considerations such as economic benefits cannot mobilize the enthusiasm of new energy development enterprises

In addition, existing studies have not given enough restrictive consideration to the total installed capacity of new energy. In fact, the installed capacity of wind power and photovoltaic power generation in the process of new energy development is limited by the new energy resources that can be developed in the region. As far as the system is concerned, the pressure of peak regulation is mostly reflected in the low load period of the year, and the rest of the time is especially during the peak load period. The power system is in the peak period of power consumption. The output of new energy can improve the power supply capacity of the power system. The new energy output in this period is limited due to the load characteristics of the power grid

In addition, the energy storage device completely follows the load characteristics of the power system, and frequent charging and discharging will also affect the service life of the energy storage device. Frequent replacement of equipment in the later period will also cause new investment and affect the overall economic benefits of the project.

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