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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 power, its calculation efficiency is low, and it is difficult to adapt to practical applications

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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