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Method and device for predicting receiving-end power grid blocking of high proportion renewable energy cross-region interaction 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: 2019-10-18
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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  • Method and device for predicting receiving-end power grid blocking of high proportion renewable energy cross-region interaction consumption
  • Method and device for predicting receiving-end power grid blocking of high proportion renewable energy cross-region interaction consumption
  • Method and device for predicting receiving-end power grid blocking of high proportion renewable energy cross-region interaction 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 method and device for predicting receiving-end power grid blocking of high proportion renewable energy cross-region interaction consumption. The method comprises steps that (1), based on system standby scheduling, a blocking analysis model for cross-river transmission channel blocking caused by a north-south peak-regulation mutual aid is established; (2), the analysis model is solved under system total standby and average standby modes to obtain a power region and a time region with insufficient tidal margins in a cross-river cross section under the two alternative modes, and (3), according to the power region and the time region with the insufficient tidal current margins in the cross-river cross section under the two standby modes respectively, the probability of receiving-end power grid blocking in each standby mode is calculated. The method is advantaged in that the probability of the receiving-end power grid blocking can be obtained, and the method is forguiding and adjusting a 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 Applications(China)
IPC IPC(8): H02J3/00H02J3/38
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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