Correction method of simulation track of power grid frequency dynamic process

A dynamic process and power grid frequency technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as difficulties

Active Publication Date: 2013-10-02
NORTHEAST POWER SCI RES INSTITUTION +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above shortcomings make this frequency simulation trajectory adjustment method encounter great difficulties in actual power system applications

Method used

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  • Correction method of simulation track of power grid frequency dynamic process
  • Correction method of simulation track of power grid frequency dynamic process
  • Correction method of simulation track of power grid frequency dynamic process

Examples

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Embodiment Construction

[0095] Such as figure 1 , 2 , 3, 4, 5-1, 5-2, a method for correcting the dynamic process simulation trajectory of power grid frequency, comprising the following steps:

[0096] Step 1) Obtain the frequency measured traces of multiple grid power shedding events by a fault recorder (commercially available product);

[0097] Step 2) Establish a simulation model and input parameters in the power system simulation software (i.e. Power System Analysis Software Package (PSASP) for short), and obtain the power grid dynamic process frequency simulation track;

[0098] Step 3) according to step 1) and step 2) establish the mathematical evaluation system of frequency emulation trajectory and measured trajectory similarity; Described mathematical evaluation system is summarized as follows:

[0099] ① Define the characteristic index of the closeness between the simulated trajectory and the measured trajectory of the frequency dynamic process, including the initial frequency drop differe...

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Abstract

The invention discloses a correction method of a simulation track of a power grid frequency dynamic process. The correction method comprises the steps of: obtaining a frequency actual measurement track of a power grid power loss event; establishing a simulation model and an entering parameter of a target power grid in power system simulation software to obtain a frequency simulation track; establishing a mathematical evaluation system of similarity of a simulation track and the actual measurement track; determining a speed controller parameter to be regulated and an adjustable range thereof; and based on a tabu search algorithm, regulating the parameter to ensure that the frequency simulation track and the actual measurement track have better similarity. The correction method provided by the invention can ensure that the power grid frequency simulation track approaches the actual measurement frequency track of a system, and provides the basis for a frequency control and low-frequency load-shedding scheme of a power system, thus operation stability and reliability of the power system are improved.

Description

technical field [0001] The invention relates to a method for correcting a simulation track of a power grid frequency dynamic process, in particular to a method for correcting a power grid frequency dynamic process simulation track based on a tabu search. Background technique [0002] Grid frequency is an important parameter of power system and one of the main indicators to measure power quality. When the power system is disturbed by tripping of large units, jumping of tie lines, or switching of large-capacity loads, the active power balance of the system is destroyed, causing the system frequency to change and then the frequency dynamic process to occur. When the system frequency changes greatly, it will bring obvious adverse effects to the power system, and even lead to frequency stability damage accidents. Although the capacity of interconnected systems is increasing, the probability of global frequency collapse is getting smaller and smaller, but the consequences will be...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02E60/76Y04S40/22Y02E60/00
Inventor 叶鹏刘劲松王刚史喆张涛张德惠李剑峰陶家琪
Owner NORTHEAST POWER SCI RES INSTITUTION
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