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Probabilistic load flow calculation method considering static frequency characteristic uncertainty

A probabilistic power flow calculation and frequency characteristic technology, which is applied to AC networks, AC network circuits, and circuit devices with the same frequency from different sources. And other issues

Active Publication Date: 2017-05-31
NARI TECH CO LTD +4
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  • Summary
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  • Claims
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Problems solved by technology

When a large-scale disturbance occurs in the system, the frequency regulation performance of the unit will be more affected, and the uncertainty of the load and unit response will be more prominent. difficulty

Method used

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  • Probabilistic load flow calculation method considering static frequency characteristic uncertainty
  • Probabilistic load flow calculation method considering static frequency characteristic uncertainty
  • Probabilistic load flow calculation method considering static frequency characteristic uncertainty

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Embodiment Construction

[0039] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0040] The application principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] A probabilistic power flow calculation method considering the uncertainty of static frequency characteristics is characterized by including the following steps:

[0042] Step 1: Input raw data;

[0043] Step 2: Use the deterministic power flow calculation method to calculate the power flow distribution under a given system node injection amount, so as to obtain the node state variable X of the node at the reference operating point 0 , Jacobian matrix J 0 , Find the sensitivity matr...

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Abstract

The invention discloses a probabilistic load flow calculation method considering static frequency characteristic uncertainty. The method comprises the steps of establishing a probabilistic load flow calculation model considering static frequency characteristic uncertainty of a generator set and a load by combining an idea of a dynamic load flow according to a characteristic of primary frequency modulation performance uncertainty of load generation in a power system; performing analytical calculation by combining Monte Carlo sampling and a cumulant method as well as Gram-Charlier expansion series; and providing probability distribution of active power output of the load and a generator and probability distribution of active power load flows of lines after a fault of the system. Therefore, a calculated result is accurate and close to a running status of an actual power grid.

Description

Technical field [0001] The invention belongs to the field of power system operation and automation, and specifically relates to a probabilistic power flow calculation method considering the uncertainty of static frequency characteristics. Background technique [0002] In recent years, my country’s new energy has developed rapidly. Due to the weak controllability and strong randomness of wind power and photovoltaic output, its large-scale integration will greatly increase the uncertainty of power production and bring new challenges to the safe and stable operation of the power grid. ; The charging and discharging of large-scale electric vehicles has increased the randomness of power consumption. Existing probabilistic power flow models are mainly based on this background, establishing random models of wind power, photovoltaic, electric vehicles, etc., and calculating the probability distribution of node voltage and branch power flow. However, these calculation results cannot compl...

Claims

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Application Information

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IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 沈秀芬戴则梅王毅闪鑫陆娟娟彭龙查国强
Owner NARI TECH CO LTD
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