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Power supply aggregation and clustering method in new energy cluster power grid

A new energy and power supply technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of not being a peak-shaving power supply and not fully determining the network dynamics characteristics, so as to reduce the overall impact, improve the consumption level, Effect of Improving Volatility Characteristics

Inactive Publication Date: 2021-08-27
STATE GRID GASU ELECTRIC POWER RES INST +3
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Problems solved by technology

Most of the existing correlation aggregation modeling technologies are based on topological connections for coupling analysis between new energy sources, but the topological connection relationship cannot completely determine the dynamic characteristics of the network. capacity, thus may not be important for peak shaving power

Method used

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  • Power supply aggregation and clustering method in new energy cluster power grid
  • Power supply aggregation and clustering method in new energy cluster power grid
  • Power supply aggregation and clustering method in new energy cluster power grid

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example

[0046] Example: Based on the above method, take Gansu Power Grid as an example to carry out calculation example analysis, refer to image 3 .

[0047] (1) Determine the shortest electrical distance matrix of Gansu power grid

[0048] Extract the data of Gansu power grid, extract the spatial distribution information of various power sources such as new energy, water, and fire in the region; calculate the shortest electrical distance between nodes according to the structure information of the power supply electrical network in the region and refer to the definition above.

[0049] (2) Pre-determined group aggregation center

[0050] Since the 750kv node is relatively more closely connected with other nodes in the power grid and plays the role of the regional center, it should play a more important role in the peak shaving task. The number of 750kV node names in the area is counted, according to the distance between each power source and the 750kv node According to the spatial ...

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Abstract

The invention relates to a power supply aggregation and clustering method in a new energy cluster power grid, and the method comprises the steps: obtaining a shortest electrical distance matrix between any two nodes of a to-be-aggregated region of the power grid, and considering the constraint of a tie line, and determining M aggregation centers; representing a correlation index between any two nodes in the region by a corresponding element in the shortest electrical distance matrix to obtain a correlation index matrix; based on the correlation index matrix, calculating correlation indexes of each type of power supply and the M aggregation centers, determining the aggregation center to which each power supply belongs according to the correlation indexes, and obtaining a pre-grouping result; and considering the net rack constraint, taking the minimum two constraints of the net rack constraint and the tie line constraint as a basis, and re-clustering the nodes which are geographically far away from each other to obtain a final clustering result. According to the method, highly equivalent aggregation of new energy power supplies with similar output characteristics can be realized, the fluctuation characteristics of a large-scale new energy base are effectively improved, the overall influence of a new energy power supply group on a power grid is reduced, and unified modeling and flexible control on each power supply are facilitated.

Description

technical field [0001] The invention relates to the technical field of new energy optimal dispatching, in particular to a power aggregation and grouping method in a new energy cluster power grid. Background technique [0002] my country's new energy adopts a centralized development, large-scale grid-connected and outbound delivery model, and has built a number of large-scale new energy bases in my country's three north regions. By the end of 2019, the installed capacity of new energy in Gansu alone had exceeded 20 million kilowatts, including 13.1206 million kilowatts of wind power and 8.399 million kilowatts of photovoltaics. Large-scale new energy bases have many wind turbines / photovoltaic modules and are widely distributed, while new energy power sources are characterized by volatility and intermittency. Poor regulation will seriously affect the level of large-scale new energy delivery and consumption. [0003] With the continuous development of new energy power sources,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/381H02J2300/20H02J2203/20
Inventor 张彦琪周强马彦宏韩旭杉吕清泉王定美丁坤赵龙沈渭程张金平高鹏飞张睿骁张珍珍张健美李津刘丽娟王学斌苟晓侃傅国斌甄文喜朱宏毅
Owner STATE GRID GASU ELECTRIC POWER RES INST
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