Risk control-based new energy incorporation power system standby method and device

Abstract

The invention discloses a risk control-based new energy incorporation power system standby method and device, and the method comprises the steps: carrying out the discretization of a new energy incorporation standby proportion, and screening out a group of new energy incorporation standby proportions meeting a system loss load risk; and finding out the optimal solution from the group of solutionsby taking the minimum new energy power abandoning rate of the system as the target, and therefore, the inclusion mode can meet the system loss load risk control requirement and the target of the minimum new energy power abandoning rate at the same time. According to the method, new energy is brought into reserve in a certain mode, the starting mode of a conventional thermal power generating unit can be reduced, and therefore the maximum new energy consumption space of the system is increased, new energy abandoned electricity is reduced, and the new energy generating capacity in a power grid isimproved.

Description

technical field [0001] The invention belongs to the technical field of electric power system dispatching, and in particular relates to a method and device for incorporating new energy into electric power system backup based on risk control. Background technique [0002] Since thermal power units still account for the highest proportion in most regional power grids in China, the start-up and shutdown process is relatively long. In the practice of dispatching production, it is necessary to arrange thermal power start-up methods according to the load reserve capacity in advance. [0003] The day-ahead reserve retention method when new energy is not considered is as follows: [0004] P max =L p,max (1+α) (1) [0005] Among them, P max is the maximum adjustable power of the conventional unit of the system, L p,max For the system to predict the maximum load, α is the reserve ratio. [0006] In actual operation, when the load is greater than the maximum adjustable conventiona...

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Problems solved by technology

[0022] The above two methods have certain limitations. The first method does not consider the predicted value of new energy, but only uses the statistical law of historical output to incorporate the fixed value into the reserve, which tends to be conservative. The second method does not consider the deviation of load forecast. Therefore, although the influence of new energy forecast deviation is considered, the total risk of loss of load is not controllable

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