A method and device for determining the access capacity of wind and solar

Abstract

The invention provides a method and device for determining the wind-light access capacity. The method comprises the steps of determining a series of wind-light access capacity proportioning schemes in advance and building new energy power output time sequences and load time sequences of each group of proportioning schemes as inputs of a sequential production simulation and optimization model; building the sequential production simulation and optimization model employing the maximum new energy acceptance as a target to form an original optimization problem; dividing the original optimization problem into sub-optimization problems and solving the sub-optimization problems in each time interval; obtaining the new energy acceptance of the original optimization problem according to the new energy acceptance of the sub-optimization problems and calculating a new energy power limiting rate; and comparing the new energy power limiting rates of all wind-light access capacity proportioning schemes and determining the optimal wind-light access capacity corresponding to the lowest value of the new energy power limiting rates. The device comprises a determining unit, a comparison unit, a calculation unit and a decomposition unit. According to the method and the device provided by the invention, the work optimization efficiency and the optimization effect are improved and the requirements of the engineering practicability are met.

Description

technical field [0001] The invention relates to the field of new energy planning and construction, in particular to a method and device for determining the access capacity of wind and solar. Background technique [0002] With the development of the economy and the continuous progress of the society, the demand and dependence on energy are increasing day by day. The new energy led by wind and light is developing very rapidly because of its large reserves, no pollution, safety and environmental protection. As of the end of 2015, the grid-connected capacity of wind power and photovoltaic power generation in my country has reached 145GW and 43GW, ranking first in the world. The output of new energy has strong randomness and volatility. There is still a lack of scientific and reasonable planning for the development of new energy in some areas. For example, the planning of new energy capacity is only based on the resource levels of wind energy and solar energy. The mismatch betwe...

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Problems solved by technology

The second method is an optimization method based on time-series production simulation. This type of method is based on the long-term new energy output sequence, fully considering the fluctuation and daily variation characteristics of new energy output, and the various boundary conditions in the actual operation of the power grid. The calculation results obtained are more scientific and reasonable, but the disadvantage is that the number of optimized time sections is large, and the required solution takes a long time. However, the operational constraints in the actual power system are very complex, and the long-term data span greatly increases the optimization time. The scale of the problem, and the optimization solution time increases exponentially with the number of optimization variables, which undoubtedly greatly reduces the engineering practicability of the method

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