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Method for establishing Hamiltonian model of diesel generating set

A technology for diesel generator sets and building methods, used in complex mathematical operations, geometric CAD, design optimization/simulation, etc.

Active Publication Date: 2021-03-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no method for Hamiltonian modeling of diesel generator sets

Method used

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  • Method for establishing Hamiltonian model of diesel generating set
  • Method for establishing Hamiltonian model of diesel generating set
  • Method for establishing Hamiltonian model of diesel generating set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] A method for establishing a Hamiltonian model of a diesel generating set, wherein the diesel generating set includes a diesel engine and a generator, comprising the following steps:

[0066] Step 1: Establish the Lagrangian function of the diesel engine:

[0067] (1) The establishment process of the actuator Lagrangian model:

[0068] The actuator is the actuator of the diesel engine to the external control signal, through which the control of the diesel engine is realized, and all types of diesel actuators are the same after being abstracted into mathematical models.

[0069] Assuming that the input signal of the electromagnetic actuator of the diesel engine is u, the displacement of the output shaft is x, the electromagnetic force F generated by the armature movement on the shaft can be expressed as F(x,u), assuming that the initial actuator works at the input signal u 0 , the displacement is x 0 The steady state of , then the electromagnetic force can be expressed ...

Embodiment 2

[0138] In order to verify the correctness of the Hamiltonian function in Embodiment 1, simulation is carried out from two aspects, (1) the change of the Hamiltonian function with time; (2) the change of the Hamiltonian function and the active power of the generator.

[0139] Simulation parameters:

[0140] The main parameters of a diesel generator set: rated power of diesel engine 1250kW, rated speed n=1500r / min, m 1 =0.8kg, moment of inertia J=71.822kg.m 2 , the number of generator pole pairs p=2; generator damping coefficient D=0.1753; direct axis armature reactance X ad =1.96, generator time constant T d0 =2.8; direct axis synchronous reactance X d =2.053; AC synchronous reactance X q =1.0; direct axis transient reactance X′ d =0.213; quadrature axis transient reactance X' q =0.168, excitation winding reactance X f =2.09; line reactance X L =0.1; Transformer equivalent reactance X T =0.15, infinite bus voltage U S = 1.0.

[0141] Simulation working condition 1: G...

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Abstract

The invention discloses a method for establishing a Hamiltonian model of a diesel generating set, and belongs to the technical field of generator set stability analysis and control, the diesel generating set is composed of a diesel engine and a generator and is a complex nonlinear system, the modeling method of the diesel generating set is researched from the dynamics level, and a foundation is laid for further control of the diesel generating set. Firstly, a diesel engine Lagrange function is converted into a Hamiltonian function according to the analytical dynamics principle, the Hamiltonianfunction is added into a generator Hamiltonian function, the overall Hamiltonian function of a diesel generator set is obtained, and a diesel engine Hamiltonian equation is derived based on the obtained Hamiltonian function and differential equations of a diesel engine body and an actuator; a Hamiltonian model of the whole generator set together is formed with the Hamiltonian equation of the generator.

Description

technical field [0001] The invention belongs to the technical field of diesel generators, in particular to the Hamiltonian modeling technology of diesel generator sets, and more specifically relates to a method for establishing the Hamiltonian model of diesel generator sets. Background technique [0002] Diesel generator set is a flexible and fast power supply, which is widely used in various places, especially as a backup power supply, and is adopted by all walks of life. With the development and utilization of large-scale new energy, especially With the rapid development of microgrid, it is an effective method to use diesel generator set as a regulating power source to stabilize the power fluctuation of microgrid, which makes the application of diesel generator set develop rapidly. In this context, the cooperative control technology of diesel generator set and other equipment has become a research hotspot, which requires a deeper exploration of the internal mechanism of di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/20G06F17/11
CPCG06F30/17G06F30/20G06F17/11Y02E60/00
Inventor 钱晶曾云吕顺利王芳芳梅宏李丹于凤荣
Owner KUNMING UNIV OF SCI & TECH
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