A receiving-end power grid congestion prediction method and device for high-proportion renewable energy cross-regional interactive consumption

A renewable energy and receiving-end power grid technology, applied in the electric power field, can solve the problems of transmission section blockage and increased pressure on the safe operation of the receiving-end power grid, so as to achieve the effect of optimizing the allocation of resources and alleviating the problem of regional transmission congestion.

Active Publication Date: 2020-09-29
STATE GRID JIANGSU ECONOMIC RES INST +1
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Problems solved by technology

Due to the inconsistency between the landing point of a high proportion of incoming electricity from outside the area and the load center of the receiving end network, as well as the intermittent nature of local new energy output, the pressure on the safe operation of the receiving end power grid is increasing, especially the blockage of important transmission sections caused by affecting peak shaving demand Phenomena happen from time to time

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  • A receiving-end power grid congestion prediction method and device for high-proportion renewable energy cross-regional interactive consumption
  • A receiving-end power grid congestion prediction method and device for high-proportion renewable energy cross-regional interactive consumption
  • A receiving-end power grid congestion prediction method and device for high-proportion renewable energy cross-regional interactive consumption

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Embodiment Construction

[0059] This embodiment discloses a receiving-end power grid congestion prediction method for cross-regional interactive consumption of high-proportion renewable energy, including the following steps:

[0060] (1) Based on the system backup dispatching, the congestion analysis model of the congestion caused by the north-south peak shaving mutual aid is established.

[0061] Among them, the established blocking analysis model is specifically:

[0062]

[0063] In the formula, f is the objective function, the subscript i represents the corresponding value of generator i, the subscript t represents the corresponding value at time t, P Gi,t 、D i,t , R i,t Respectively, the output power of generator i, the standby power under operation, and the standby power during operation at time t; a i ,b i Respectively are generator i cost curve coefficients; p i , β i , gamma i are the start-up cost at room temperature, lower standby cost, and upper standby cost of generator i respecti...

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Abstract

The invention discloses a receiving-end power grid congestion prediction method and device for cross-regional interactive consumption of high-proportion renewable energy. The method includes: (1) Establishing north-south peak-shaving mutual aid based on system backup scheduling to cause congestion of cross-river transmission channel congestion analysis model; (2) solve the analysis model under the two backup modes of system total backup and average backup, and obtain the power area and time area where the tidal current margin of cross-river section is insufficient under the two backup modes; (3) respectively according to the two backup modes The power area and time area where the tidal current margin of cross-river section is insufficient under each backup mode is calculated, and the probability of occurrence of grid blockage at the receiving end under each backup mode is calculated. The invention can obtain the accurate occurrence probability of grid blockage at the receiving end, and guide the adjustment of the future standby operation mode.

Description

technical field [0001] The invention relates to electric power technology, in particular to a receiving-end power grid congestion prediction method and device for cross-regional interactive consumption of high-proportion renewable energy. Background technique [0002] With the large amount of renewable energy connected to the grid, the scale of long-distance cross-regional transmission continues to grow, and some economically developed regions in China have begun to show obvious characteristics of a high-proportion external power feed-in and a large number of local new energy sources. . At present, this change in power supply characteristics is bringing many problems to the safety and stability of the receiving end system and peak-shaving backup. Due to the inconsistency between the landing point of a high proportion of incoming electricity from outside the area and the load center of the receiving end network, as well as the intermittent nature of local new energy output, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06
CPCH02J3/382H02J3/00H02J2203/20Y04S10/50
Inventor 郭莉吴晨陈立丛小涵苗曦云王蓓蓓谈健牛文娟
Owner STATE GRID JIANGSU ECONOMIC RES INST
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