Probability load flow calculation method considering admitting ability of power grid
A technology of probabilistic power flow calculation and acceptance capacity, which is applied in calculation, electrical components, circuit devices, etc., can solve the problems of long calculation time and the inability of new energy power generation to be fully accepted by the grid, so as to expand the application range and ensure calculation accuracy Effect
A technology of probabilistic power flow calculation and acceptance capacity, which is applied in calculation, electrical components, circuit devices, etc., can solve the problems of long calculation time and the inability of new energy power generation to be fully accepted by the grid, so as to expand the application range and ensure calculation accuracy Effect
CN105656038AActive Publication Date: 2016-06-08NARI TECH CO LTD +2
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[0026] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0027] A probabilistic power flow calculation method that takes into account the capacity of the power grid, such as figure 1 shown, including the following steps:
[0028] Step 1. According to the acceptance capacity of the power grid for new energy power generation, the cumulative distribution function of the new energy power generation variable is established, where the cumulative distribution function is described in the form of a piecewise function:
[0029] Suppose there are K new energy generation power variables P 1 ,P 2 ,…P K , the maximum power of new energy generation that the grid can accept is p limit , then the cumulative distrib...
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The invention discloses a probability load flow calculation method considering the admitting ability of a power grid. The method comprises the following steps that 1, a cumulative distribution function of a new energy power generation power variable is built according to the admitting ability of the power grid to new energy power generation power, wherein the cumulative distribution function is described in the form of a piecewise function; 2, the sampling frequency between all sections of the new energy power generation variable is calculated according to the cumulative distribution function F(pk) of the built new energy power generation power variable based on the proportional distribution principle, then a Latin hypercube sampling method is utilized for sampling all the sections of the new energy power generation power variable, and a sample matrix of the new energy power generation power variable is built; 3, the sample matrix of the new energy power generation power variable is adopted as an input variable for probability load flow calculation, a disperse result of an output variable is obtained, an empirical distribution function is utilized for fitting, and a probability distribution function of the output variable is obtained. The application range of the Latin hypercube sampling method is widened, and calculating precision is guaranteed.
Description
technical field [0001] The invention relates to a method for calculating the probability power flow taking into account the acceptance capacity of the power grid. Background technique [0002] As large-scale new energy power generation is connected to the grid, the randomness and volatility of new energy power generation lead to more and more obvious node voltage or branch power flow limit violations during the operation of the power system, which reduces the safety of power system operation. Therefore, it is necessary to qualitatively and quantitatively analyze the impact of new energy generation access on the power system. In the aspect of testing the planning scheme or operation of the power system including new energy power generation, the traditional power flow calculation method can no longer reflect the system operation under the change of operation mode, and it is replaced by the probabilistic power flow calculation method that can reflect the probability characteris...
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Patent Timeline
08 Jun 2016
Publication
CN105656038A
- IPC
- H02J3/00; H02J3/38; G06Q50/06
- CPC
- G06Q50/06; H02J3/00; H02J3/382; H02J2203/20; Y02E40/70; Y04S10/50
- Inventors
- 丁恰; 喻洁