Method for rapidly determining tie line power feasible regions of interconnected power grids

A tie-line power and interconnection grid technology, applied in the field of rapid determination of the feasible domain of tie-line power in the interconnection grid, can solve problems such as difficult practical application and low calculation efficiency

Active Publication Date: 2019-07-05
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the existing research can find the accurate feasible region of tie line pow

Method used

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  • Method for rapidly determining tie line power feasible regions of interconnected power grids
  • Method for rapidly determining tie line power feasible regions of interconnected power grids
  • Method for rapidly determining tie line power feasible regions of interconnected power grids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] see figure 1 , a fast method for determining the power feasible region of interconnected grid tie lines, mainly includes the following steps:

[0090] 1) Establish an economic dispatch model with coupled variables.

[0091] The main steps to establish an economic dispatch model with coupled variables are as follows:

[0092] 1.1) Establish objective function Among them, P G Output power for the generator set. h 1 and H 2 is the coefficient matrix. The superscript T means transpose.

[0093] In most electricity markets, the objective function is denoted as P G the quadratic function of .

[0094] 1.2) Determine the constraints of the objective function.

[0095] The power supply and power demand balance constraints are as follows:

[0096] e G P G +e D P D +e B P B =0. (1)

[0097] In the formula, e G and e D represents a unit vector.

[0098] The generator capacity constraints are as follows:

[0099]

[0100] In the formula, (·) and repres...

Embodiment 2

[0176] An experiment to verify the fast determination method of the power feasible region of interconnected grid tie lines mainly includes the following steps:

[0177] 1) Use the IEEE 118 node test system to build an experimental environment.

[0178] Scenario Case 1: Nodes 5 and 60 are used as boundary nodes to connect AC lines.

[0179] Scenario Case 2: Use nodes 5 and 60 as boundary nodes to connect to the AC tie line; take node 20 as the boundary node to connect to the DC tie line.

[0180] 2) Determine the comparison method:

[0181] M0: the method for quickly determining the power feasible region of the tie line of the interconnected power grid in Embodiment 1.

[0182] M1: Literature "W.Lin, Z.Yang, J.Yu, G.Yang and L.Wen, "Determination of TransferCapacity Region of Tie Lines in Electricity Markets: Theory and Analysis", vol.239, pp.1441-1458 , 2019." The proposed determination method.

[0183] M2: The method proposed in the document "D. Bertsimas and J.N. Tsitsik...

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Abstract

The invention discloses a method for rapidly determining tie line power feasible regions of interconnected power grids. The method comprises the main steps of 1) establishing an economic dispatching model with coupling variables; and 2) determining a tie line power feasible region on the basis of an improved multi-parameter planning theory. The method is capable of improving the depiction efficiency of tie line power feasible regions.

Description

technical field [0001] The invention relates to the field of power grids, in particular to a method for quickly determining the power feasible range of tie lines of interconnected power grids. Background technique [0002] With the increase in power demand and the integration of renewable energy, it is difficult for a single regional power grid to ensure the balance of power supply and demand. In order to achieve optimal utilization of resources in a larger area, regional grid interconnection has become a common choice. The tie-line power feasible region is very important to the safe and economical operation of the power system. [0003] On the one hand, the accuracy of the feasible region ensures the safety and economy of the power system when regional power transmission is required; on the other hand, the larger feasible region indicates that the tie-line power transmission between regional grids can allow a wider transmission range This facilitates further optimal use o...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/46
CPCH02J3/005H02J3/46H02J2203/20
Inventor 余娟杨知方林伟朱正春
Owner CHONGQING UNIV
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