Medium and long term power grid planning method for optimizing new energy construction and grid connected time sequence

Abstract

The invention discloses a medium and long term power grid planning method for optimizing new energy construction and the grid connected time sequence. The method comprises the steps that S1) system operation prediction data, grid structure data, new energy plan data and the expected absorption level of new energy are obtained; S2) a power grid plan model is established; S3) the power grid plan model is solved; S4) a new energy and new line construction time sequence model is established; and S5) the new energy and new line construction time sequence model is solved. According to the invention, the absorption level of new energy is effectively improved to solve the problem that output of new energy is limited; and when the power grid is planned, both increasing trend of the system load and growth of new energy installation are considered, the new energy absorption problem is comprehensively considered from the aspects including the peak capability, the grid configuration limitation, the trend distribution, the system operation cost and the operation benefit, and the new line and new energy construction time sequence is optimized so that the utilization rate of new lines and the operation benefit of new energy are optimized.

Description

technical field [0001] The invention relates to a medium-to-long-term power grid planning method, in particular to a medium-to-long-term power grid planning method for optimizing new energy construction and grid connection timing, and belongs to the technical field of power grid planning. Background technique [0002] The development of wind power, photovoltaic and other new energy power generation has shown obvious economic and environmental benefits. In the future, new energy will occupy an increasingly important position in my country's power grid structure. However, the random fluctuation characteristics of new energy output bring challenges to the safe and stable operation of the power grid. Due to the insufficient transmission capacity of the grid grid, the abandonment of wind and light seriously restricts the large-scale grid integration of new energy. Therefore, it is urgent to establish a grid planning method for new energy consumption, so that the grid structure of...

AI Technical Summary

Problems solved by technology

[0004] Existing power grid planning methods are rarely proposed for new energy grid integration, and generally only select the best planning schemes by considering technical and economic indicators, and the rationality of such schemes often depends on the experience of planners , it is difficult to obtain the optimal power grid planning scheme; in addition, most of the existing power grid planning methods are based on the load growth trend, under the constraints of system operation security and other constraints, and aim at the minimum investment cost to determine the new line, without in the planning process Considering the development of new energy sources, there are certain limitations

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