Method for calculating admitting capability of distributed power supply based on hierarchical and divisional idea
A distributed power, hierarchical partitioning technology, applied in computing, resources, data processing applications, etc., can solve the problems of lack of mature methods and tools for absorbing new energy in the distribution network, difficulty in solving, and messy grid connection of distributed power.
Active Publication Date: 2017-08-29
STATE GRID CORP OF CHINA +3
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Problems solved by technology
[0003] At present, distribution network planning cannot grasp the overall situation of distributed power in the region, and there is a lack of mature methods and tools for evaluating the consumption of new energy in the distribution network, resulting in disordered and disorderly grid connection of distributed power, which has an impact on the safe and stable operation of the power grid.
At the same time, there is a lack of adaptability evaluation methods for distributed power access solutions, and it is difficult to track and feedback its application
In addition, the current research on the calculation of the consumption capacity of distributed power generation is mainly based on a single object, which is likely to cause "dimension disaster" and make it difficult to solve
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Embodiment
[0156] 1) Determine the evaluation grid object and obtain its basic data.
[0157] This embodiment is evaluated based on the power grid of a certain village, which is powered by two 10 kV lines, one of which has a small hydropower of 1.675MW.
[0158] 2) Draw up the planning scheme of distributed power supply.
[0159] 3) Obtain the access capacity, model and parameters of the distributed power in the distributed power planning scheme.
[0160] Such as Figure 4 , 5, 6 shows the power grid connection line of the distributed power generation planning scheme formulated. The initial planning scheme for distributed power generation formulated in this embodiment is: two 10kV lines are connected to distributed photovoltaic 3.034MW and 1.044MW respectively, and one 0.4kV line is connected to distributed photovoltaic 30kW.
[0161] 4) According to the access capacity and access voltage level of the distributed generation in the planning scheme of the distributed generation, the sc...
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The invention relates to a method for calculating the admitting capability of a distributed power supply based on a hierarchical and divisional idea. The method comprises the following steps: 1) determining a regional power grid to be evaluated and a voltage class; 2) drafting a distributed power supply access planning scheme; 3) acquiring the access capacity, the model, and the parameters of the distributed power supply in the distributed power supply access planning scheme; 4) dividing the regional power grid into various ranges so as to obtain hierarchical and divisional regional power grid ranges; 5) evaluating the adaptability of the power grids in respective ranges to obtain respective evaluation index values and index scores; 6) subjecting the regional power grid to distributed power supply adaptability evaluation to obtain a regional power grid adaptability score; and 7) determining whether the regional power grid has a capability to admit the distributed power supply and obtain the maximum admitting ability of the regional power grid to the distributed power supply by means of loop iteration. The method can provide theoretical and technical support for distributed power supply grid-connected scheme evaluation and selection, and regional distributed power supply and power grid coordination planning.
Description
technical field [0001] The invention relates to the technical field of distribution network distributed power supply planning, in particular to a calculation method of distributed power supply capacity based on the idea of layered partitioning. Background technique [0002] In recent years, with the high penetration rate and large-scale grid connection of distributed power generation, it has had a wide and far-reaching impact on many fields such as the safety, reliability and power quality of distribution network power supply. The access of distributed power can increase the reliability of distribution network, reduce line loss, support voltage and improve load power factor, etc., but the unlimited access of distributed power will also affect the safe operation of distribution network. Therefore, it has become a key issue in the planning and operation of the distribution network to scientifically evaluate the ability of the distribution network to accommodate distributed g...
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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0631G06Q10/0639G06Q50/06Y02E40/70Y04S10/50
Inventor 孙充勃宋毅吴志力杨晓东施鹏佳冷正龙薛振宇原凯靳夏宁张林垚刘聪陈亮张逸君
Owner STATE GRID CORP OF CHINA