Transient stability out-of-limit probability calculation method and device for new energy power generation uncertainty

A power grid transient stability and transient stability technology, which is applied in the direction of circuit devices, calculations, and AC networks with the same frequency from different sources, can solve problems that cannot meet the requirements of online security and stability analysis and calculation speed

Active Publication Date: 2021-02-19
NARI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a transient stability limit probability calculation method and device considering the uncertainty of new energy power g

Method used

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  • Transient stability out-of-limit probability calculation method and device for new energy power generation uncertainty
  • Transient stability out-of-limit probability calculation method and device for new energy power generation uncertainty
  • Transient stability out-of-limit probability calculation method and device for new energy power generation uncertainty

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Embodiment 1

[0048] Embodiment 1: as figure 1 As shown, the present invention proposes a method for calculating the transient stability over-limit probability of uncertainty in new energy power generation, including the following steps:

[0049] Step 1: Carry out quantitative evaluation of transient stability under each expected fault in the expected fault set F for the expected operating state S of the power grid at the set time t, and obtain the transient stability key mode set M of each expected fault in F and the corresponding key modes in M The transient stability margin of and the transient stability participation factors of each new energy station in the new energy station set N;

[0050] Among them, M is a set of transient stability modes whose difference between the transient stability margin and the minimum value of the transient stability margin in all transient stability modes is less than the set value (usually set to 0.2).

[0051] If the participation factor is greater than...

Embodiment 2

[0085] Embodiment 2: The present invention proposes a transient stability over-limit probability calculation device for uncertainty in new energy power generation, including:

[0086] The transient stability quantitative evaluation module is used to execute: perform quantitative evaluation of transient stability under each expected fault in the expected fault set F for the expected operating state S of the power grid at the set time t, and obtain the transient stability key mode set of each expected fault in F M and the transient stability margin corresponding to each key mode in M ​​and the transient stability participation factor of each new energy station in the new energy station set N;

[0087] The leading new energy station determination module is used to execute: for each expected fault in F, calculate the comprehensive influence factors of each new energy station in N on the transient stability of the power grid under the expected fault, and generate the leading new ene...

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Abstract

The invention discloses a transient stability out-of-limit probability calculation method and device considering new energy power generation uncertainty, and the method comprises the steps: calculating a comprehensive impact factor of a new energy field station for the transient stability of a power grid according to the transient stability margin of a transient stability key mode and a new energyfield station participation factor, and determining a leading new energy field station; according to the new energy station active probability distribution density function, the active real-time planning value and the comprehensive influence factor of the active real-time planning value on the transient stability of the power grid, determining an active sampling interval of the leading new energystation, and generating an active grading interval combination of each leading new energy station; calculating the transient stability margin of the anticipated fault in the power grid operation state corresponding to each combination to obtain a transient stability margin out-of-limit combination; and calculating the transient stability out-of-limit probability of the new energy power generationuncertainty according to the probability of the combination of the anticipated fault occurrence probability and the transient stability margin out-of-limit. Quantitative evaluation of the transient stability out-of-limit risk of the power grid is realized.

Description

technical field [0001] The invention relates to a method and device for calculating the transient stability limit-crossing probability of uncertainty in new energy power generation, and belongs to the technical field of power system operation and control. Background technique [0002] The security and stability of the power grid changes with the change of the power grid operation state. The uncertainty of new energy power generation will lead to the uncertainty of the power grid operation state. The safety and stability of the power grid under the new energy grid connection presents a probabilistic characteristic. As the proportion of new energy power generation gradually increases, the uncertainty of power grid operation status will gradually intensify, and the probability characteristics of power grid security and stability cannot be ignored. Important indicators. [0003] For the treatment of uncertainty in new energy power generation, the scenario method is usually adop...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/06H02J3/38G06Q10/06G06Q50/06
CPCH02J3/00H02J3/06H02J3/381G06Q10/06393G06Q50/06H02J2203/10H02J2203/20H02J2300/20Y04S10/50
Inventor 徐泰山刘韶峰王昊昊汪马翔常康李吉晨张昊天陈堂龙扈卫卫
Owner NARI TECH CO LTD
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