A load margin analysis method for regional power grid based on primal dual interior point method
A regional power grid and load margin technology, applied to load forecasting, electrical components, circuit devices, etc. in the AC network, can solve problems such as the difficulty in guiding the long-term development of the power grid, the impact of load distribution, analysis and evaluation, and achieve simple and practical analysis methods , improve the safety margin, and solve the effect of fast speed
Active Publication Date: 2018-04-13
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
In the power grid planning stage, the power grid planning principles of most cities generally specify the choice of grid structure, the planned construction scale of substations, and the selection of line sections, etc. The power flow distribution is greatly affected by the network topology, power output and substation load distribution. At present, when arranging the operation mode, the method of power flow calculation is mainly used to manually check the static safety of the power grid, and no effective automatic method has been formed to analyze the load level of the power grid. assessment, so that grid planners lack foresight when expanding or transforming the grid, and it is difficult to guide the long-term development of the grid
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[0045] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0046] Such as figure 1 Shown, is a kind of regional power grid load margin analysis method based on the original dual interior point method of the present invention, comprises the following steps:
[0047] S1, refining the grid structure of the regional power grid, determining the number of network nodes and branches of the grid structure, and numbering the nodes and branches of the grid structure to obtain a simplified analysis model;
[0048] S2. With the goal of maximizing the total load margin of the power supply main transformer in the regional power grid, and taking the N-1 safety of the power grid as the criterion, construct a mathematical optimization model that meets the grid operation constraints and equipment capacity constraints;
[0049] S3. Use the optimi...
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The invention provides a regional power grid load margin analysis method based on a prime-dual interior point method, which comprises the steps of: refining and simplifying a physical model of a regional power grid; aiming to maximize a power supply main transformer load margin of the regional power grid, and by using power grid N-1 safety as a criterion, constructing a mathematical optimization model which meets operation constraints and an equipment capacity constraint of the power grid; solving a load margin optimization model based on the prime-dual interior point method, and carrying out N-1 safety analysis on the regional power grid to obtain a distribution condition of a load when the load margin is optimal; and by a slack variable evolution condition of an algorithm, judging key constraints which limit the power grid load margin. The regional power grid load margin analysis method provided by the invention is simple and practical, has a high solution speed, can accurately and rapidly analyze the load margin of the regional power grid, indicates bottleneck information which limits load capacity of the power grid, and has practical reference value for works of power grid planning, operation scheduling and the like.
Description
technical field [0001] The invention relates to the technical field of power grid load evaluation, in particular to a regional power grid load margin analysis method based on the original dual interior point method. Background technique [0002] As the scale of the power system increases day by day, its operating characteristics become more and more complex. On the other hand, along with the steady growth of the national economy, the electricity load is increasing year by year. The load capacity of the regional power grid caused by this has attracted more and more attention and research from relevant experts and scholars in the power industry. [0003] The regional power grid itself has a certain mix, including the 500kV power grid for power transmission, the 110kV power grid for power distribution, and the 220kV power grid with complex positioning. In areas with low economic development, the construction of power grids is generally relatively lagging behind, and the 220kV...
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IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/003H02J2203/20
Inventor 荆朝霞王宏益江昌旭
Owner SOUTH CHINA UNIV OF TECH