Optimization method of extra-high voltage transient stability control

A technology of transient stability and optimization method, applied in the field of power system, can solve the problems of complex topology of power grid, increase of scale of interconnected power grid, threats to the safe operation of large interconnected power grid, etc.

Active Publication Date: 2013-04-24
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

At the same time, the formation of the "Sanhua" power grid has also brought new problems, such as the multiplied scale of the interconnected power grid and the more complex topology of the power grid
Under the new power grid structure and operation mode, regional power grids will interac

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  • Optimization method of extra-high voltage transient stability control
  • Optimization method of extra-high voltage transient stability control
  • Optimization method of extra-high voltage transient stability control

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Embodiment

[0082] Local decision-making for Sichuan hydropower transmission in the UHV AC test demonstration project. The power flow diagram of the UHV power grid southward transmission in Sichuan power grid is as follows figure 2 shown. There are 886 controllable generating units in the whole network, including 108 units in Sichuan. For the convenience of research, this paper only controls large units of no less than 100MW, and there are 54 units in total. That is to say, the dimension of a particle is 54.

[0083]The established comprehensive optimization model for coordinated control of 1000kV and 500kV power grids includes objective functions, equality constraints, transient power angle inequality constraints, transient voltage inequality constraints and static inequality constraints. The model not only considers transient power angle stability, but also Considering the transient voltage stability, it can coordinately control discrete variables and continuous variables, and also in...

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Abstract

The invention relates to an optimization method in the field of electric systems, in particular to an optimization method of extra-high voltage transient stability control. The optimization method of the extra-high voltage transient stability control comprises the following steps: (1) setting up a power grid coordination control optimization model, (2) converting a constrained optimization problem of the power grid coordination control optimization model to an unconstrained optimization problem, (3) solving the unconstrained optimization problem by adopting an optimization method of a particle swarm with wavelet mutation, and (4) confirming a globally optimal solution in the particle swarm. The optimization method of the extra-high voltage transient stability control facilitates that electric power system planners and analysts grasp transient stability emergency control, and provides the basis for confirmation of emergency safety control measures of ultra-high voltage grids. The optimization method of the extra-high voltage transient stability control has the advantages of increasing wavelet mutation operation, improving global convergence characteristics, being capable of processing optimization problems of thousands of nodes, conveniently combining parallel computing techniques, and further improving computation speed by using large-scale computers.

Description

technical field [0001] The invention relates to an optimization method in the field of power systems, in particular to an optimization method for UHV transient stability control. Background technique [0002] One of the most important contents of the three lines of defense in the power system is a reasonable safety and stability control measure, and one of the most commonly used methods in the safety and stability control measure is the cut-off control. In order to ensure the transient stability of the power system, a large number of safety and stability control devices are installed in the power system. All control strategies must be formulated offline and written into the strategy table for emergency control. In actual engineering, the trial algorithm is generally used to formulate the cut-off strategy. This method usually cannot obtain the optimal cut-off plan, especially for the coordinated control of 1000kV and 500kV UHV power grids, because of its larger control range ...

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Application Information

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IPC IPC(8): H02J3/00H02J3/38
Inventor 王义红王一冰秦晓辉周勤勇
Owner CHINA ELECTRIC POWER RES INST
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