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Method for modeling power transmission margin control model considering random probability

A stochastic probability model, transmission margin technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as time-consuming, difficult to comprehensively reflect the situation, and large amount of calculation.

Active Publication Date: 2013-12-25
STATE GRID CORP OF CHINA +1
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Problems solved by technology

Therefore, if the conventional power flow method is used for power system planning and operation analysis, a large number of scheme calculations are required for various random situations, which not only requires a large amount of calculation, takes a long time, and is difficult to fully reflect the situation

Method used

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  • Method for modeling power transmission margin control model considering random probability
  • Method for modeling power transmission margin control model considering random probability
  • Method for modeling power transmission margin control model considering random probability

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Embodiment Construction

[0082] The present invention will be further described in detail below in conjunction with the drawings.

[0083] Such as figure 1 , Provide a transmission margin control model modeling method considering random probability, the method includes the following steps:

[0084] Step 1: Establish a random probability model;

[0085] Step 2: Carry out the planned random power flow calculation of the large-scale intermittent power supply connected to the grid;

[0086] Step 3: Establish a transmission margin control model considering random probability.

[0087] The random probability model in the step 1 includes a wind farm random model, a conventional unit random model, and a bus load random model; the wind farm random model includes a wind speed random model and a wind generator power random model.

[0088] The wind speed random model is processed into a three-parameter Weibull model, and the position parameter of the model is set as the minimum wind speed at the location of the wind field...

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Abstract

The invention provides a method for modeling a power transmission margin control model considering random probability. The method comprises the following steps of establishing a random probability model; carrying out scheduled random trend calculation when a large-scale intermittent type power source is accessed into a grid; and establishing the power transmission margin control model considering the random probability. The method for modeling the power transmission margin control model considering the random probability has the advantages that the accommodating capability of the grid on the new energy sources is improved for further exploring the power transmission margin control algorithm when the large-scale intermittent power source is accessed, and the technical basis is provided for the advanced control of the scheduled trend when the large-scale wind power is accessed.

Description

Technical field [0001] The invention belongs to the technical field of power automation, and specifically relates to a method for modeling a transmission margin control model considering random probability. Background technique [0002] Considering that the output power of large-scale intermittent grid-connected power sources (such as wind power, solar power, etc.) has obvious randomness and volatility, the traditional transmission margin model based on determining the power flow power of the grid impedance characteristic can only give the system a certain Or the branch power flow state and the relationship with the safety threshold in certain specified system states, it is impossible to fully evaluate the impact of such power sources on the safety and stability limit of the entire network after being connected to the grid. [0003] The power system generally needs to plan the development of power supply, power grid, and load for several years or even decades. When the time is long...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q50/06
CPCY02E60/00
Inventor 董炜张传成丁强戴赛蔡帜许丹闫翠慧
Owner STATE GRID CORP OF CHINA
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