Method for optimizing frequency feedback coefficient of speed adjuster of power generator

A technology of frequency feedback and optimization method, applied in electrical digital data processing, design optimization/simulation, instruments, etc., can solve problems such as difficult to balance control performance and communication cost, difficult to determine the frequency feedback coefficient matrix of the governor, etc.

Active Publication Date: 2018-10-16
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The invention provides an optimization method for the frequency feedback coefficient of the governor of a generator, which solves the problems in the prior art that it is difficult to determine the frequency feedback coefficient matrix of the governor, and it is difficult to balance the control performance and communication cost

Method used

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  • Method for optimizing frequency feedback coefficient of speed adjuster of power generator
  • Method for optimizing frequency feedback coefficient of speed adjuster of power generator
  • Method for optimizing frequency feedback coefficient of speed adjuster of power generator

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Embodiment Construction

[0045] In the following, based on the IEEE-39 standard test system, the optimization process of optimizing the frequency feedback coefficient matrix of the governor of the present invention and the sparse promotion optimization process of the target particle group will be described in detail.

[0046] The inventive method implements according to the following steps:

[0047] Step 1, establish the dynamic model of the power grid node including the governor,

[0048] The power grid node dynamics model including the governor is described by the swing equation of the traditional synchronous generator rotor, and the expression is the following formula (1):

[0049]

[0050] Among them, the subscript i, j=1, 2,..., n is the node number, and n is the number of power generation nodes in the power grid; J i ,D i are the inertia constant and damping coefficient of node i, respectively, θ i ,ω i are the phase and angular frequency of node i in the synchronous rotating reference fr...

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Abstract

The invention discloses a method for optimizing the frequency feedback coefficient of a speed adjuster of a power generator. The method comprises the steps of 1, building a power grid node dynamics model containing the speed adjuster; 2, initializing parameters of a multi-objective particle swarm optimization algorithm; 3, calculating a performance objective function and a sparsity objective function of each particle in a particle swarm; 4, updating a common elite set and a feasible solution elite set; 5, updating a position vector Xpbest of personal guide particles, a position vector Xgbest of global guide particles, wherein the position vector Xpbest and the position vector Xgbest are shown in the descriptions; 6, updating the position and speed of each particle; 7, seeking a particle corresponding to a minimum sparsity objective function J2(Xm(kmax)) in the feasible solution elite set, setting the position vector of the particle as Xm(kmax) to obtain a feedback coefficient matrix Km, namely a final optimization result. By means of the method, the power grid frequency response performance can be improved while the cost price is lowered.

Description

technical field [0001] The invention belongs to the technical field of power grid frequency control, and relates to an optimization method for the frequency feedback coefficient of a generator governor. Background technique [0002] The governor is the main controller for the primary frequency regulation of the power generation node in the power grid. It is a means of feedback adjustment to the input mechanical power according to the frequency of the power generation node. It plays an important role in the frequency stability of the power grid. Costs have a significant impact. With the development of technologies such as synchronous phase angle measurement unit (Phasor Measurement Unit, PMU) and wide area monitoring system (Wide Area Measurement System, WAMS) of the power system, real-time communication between nodes (interregions) can be realized to realize the utilization of other node information regional coordinated control. [0003] According to the communication stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 任海鹏霍龙锁军
Owner XIAN UNIV OF TECH
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