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Optimal cross-section search method for active splitting of power systems based on convex optimization theory

A power system, optimal cross-section technology, applied in circuit devices, AC network circuits, reducing/preventing power oscillations, etc., can solve the problems of complex power system structure, inability to prove robustness and correctness, etc.

Active Publication Date: 2019-11-29
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the power system has a complex structure and various operation modes, and heuristic algorithms, artificial intelligence algorithms, and other random algorithms are all based on a certain probability to solve, and it is impossible to prove the robustness and correctness of their solutions.

Method used

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  • Optimal cross-section search method for active splitting of power systems based on convex optimization theory
  • Optimal cross-section search method for active splitting of power systems based on convex optimization theory
  • Optimal cross-section search method for active splitting of power systems based on convex optimization theory

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Experimental program
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Embodiment 1IE

[0132] Embodiment 1 IEEE-9 node system

[0133] The IEEE standard three-machine nine-node system contains nine buses, three of which are generator buses. The dynamic connection diagram of the system is shown in figure 2 As shown in (a), a short-circuit fault is set at line 5-4 at 1s, and cut off at 1.4s. According to the power angle curve, the generator G 1 , G 2 As a coordinating machine group, generator G 3 For another coherent fleet. System base capacity S N =100MW According to the present invention, the optimal decoupling section obtained by solving is as follows figure 2 (e) shown. The curves of power angle, voltage and frequency of the generator obtained by decoupling the system are as follows: figure 2 (f)-(h) shown. Compared figure 2 (b)-(d) with figure 2 (f)-(h) It can be seen that after the unloading operation, the power angle, frequency and voltage of the generator are all restored to stability.

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Abstract

The invention discloses an initiative splitting optimal section searching method for a power system based on a convex optimization theory. The method comprises the following steps: taking the minimal active unbalanced power of the system after splitting as a target function, and then dividing a solution procedure into two stages: in the first stage, adopting an off-line operation for converting the target function and constraint for the system splitting into a series of equation sets meeting a convex optimization condition, and in the second stage, online substituting the power information of a generator and a load and the clustering information of a system generator as parameters into an equation, adopting an interior point method and combining with a branch and bound algorithm for quickly solving. According to the invention, on the basis of consideration for two factors of homologous clustering and minimal unbalanced power of the generator, the online solving for the initiative splitting problem can be quickly online realized.

Description

technical field [0001] The invention relates to a method for searching an optimal cross section of an active disassembly of a power system based on a convex optimization theory, and belongs to the fields of power system safety technology and power system emergency control technology. Background technique [0002] With the rapid construction of my country's power grid, with UHV as the skeleton, the power grids at all levels develop in coordination with each other, and a large power grid with the characteristics of informatization, automation, and interaction is gradually formed. The increase in voltage levels and the gradual networking of large areas have greatly shortened the electrical distance between grid nodes; power system failures have become more serious threats to grid stability. When the system is disturbed and loses stability, the generator may be in asynchronous operation state: the power angle between the asynchronous clusters swings rapidly, resulting in strong ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 贾骏谢天喜徐阳陈舒徐长福徐家园胡成博周志成陶风波
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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