Multi-scene power transmission network planning method considering load and wind power randomness under network source coordination

Abstract

The invention discloses a multi-scene power transmission network planning method considering load and wind power randomness under network source coordination. According to the planning method, load prediction and wind power output randomness are comprehensively considered, andthe multi-scene power transmission network planning method under the network source coordination drive is put forward. Themethod comprises the steps that S1, a load and wind speed probability density random model considering randomness is established, then historical data is counted, load and wind speed model parametersare obtained according to data change conditions, and then a load curve and a wind power output curve are fitted through a model Carlo; S2, an annual operation scene is obtained through multi-scene random simulation on the basis of the load curve and the wind power output curve, and a plurality of typical operation scenes are obtained through scene clustering; and S3, a planning model taking the optimal safety and economy as a target is established, and the safety and economy under different planning schemes are calculated and compared through a plurality of typical scenes to obtain an optimalwind power grid-connected point and power transmission network planning scheme.

Description

technical field [0001] The invention belongs to the field of transmission network planning, and in particular relates to multi-scenario transmission network planning considering load and wind power randomness driven by network source coordination. Background technique [0002] Under the background of the increasing scale of new energy construction such as wind farms and the gradual increase of wind power penetration power, the power grid has the problem of insufficient capacity. The expansion of new energy scale will lead to the waste of a large amount of power investment, and the uncertainty of new energy, grid structure, load characteristics, and uncoordinated expansion planning will inevitably affect the economy and security of grid planning schemes. [0003] Traditional power grid planning methods use deterministic methods to consider power grid planning in the worst scenarios, while the integration of new energy sources leads to increased fluctuations. The worst scenari...

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Problems solved by technology

The expansion of new energy scale will lead to the waste of a large amount of power investment, and the uncertainty of new energy, power grid structure, load characteristics and expansion planning will inevitably affect the economy and safety of power grid planning schemes

[0003] Traditional power grid planning methods use deterministic methods to consider power grid planning in the worst scenarios, while the integration of new energy sources leads to increased fluctuations. The worst scenario has a low probability of occurrence, short duration, and will lead to an increase in grid size and insufficient utilization. , which increases the consumption cost

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