Actual-measurement modeling method for prime mover and speed governor thereof of electric power system

A technology of power system and modeling method, which is applied in the direction of engine components, machines/engines, instruments, etc., and can solve problems such as the prime mover governor model problem of thermal power units

Active Publication Date: 2011-08-10
STATE GRID ZHEJIANG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 2000 accident caused by a tripped connection line between Alberta and British Columbia in Canada also showed that the simulation results of the old model were too optimistic
The reason is that there are problems in the models of the prime movers and governors of some thermal power units

Method used

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  • Actual-measurement modeling method for prime mover and speed governor thereof of electric power system
  • Actual-measurement modeling method for prime mover and speed governor thereof of electric power system
  • Actual-measurement modeling method for prime mover and speed governor thereof of electric power system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0115] Modeling and parameter identification of the prime mover and its governor for a 600MW unit in a power plant, the steps are as follows:

[0116] 1. Data collection

[0117] project

value

Crew name

XX power plant

Rated capacity (MW)

600

Rated main steam pressure (MPa)

24.2

Rated reheat steam pressure (Mpa)

3.976

Whether a FM is engaged

Yes

High-pressure cylinder power proportional coefficient FHP, the percentage of high-pressure cylinder output to the total output

30％

Medium pressure cylinder power proportional coefficient FIP, the percentage of medium pressure cylinder output to total output

25％

Low-pressure cylinder power proportional coefficient FLP, the percentage of low-pressure cylinder output to the total output

45％

Droop

5％

[0118] Primary frequency modulation dead zone (Hz)

±2rpm

DEH scan time (ms)

100 / 300

T...

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PUM

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Abstract

The invention provides an actual-measurement modeling method for a prime mover and a speed governor thereof of an electric power system, belonging to the technical field of electric power systems. The invention solves the problem that the traditional prime mover and the speed governor thereof generate larger bias of a simulated calculation result due to the use of a typical model and typical parameters. The actual-measurement modeling method for the prime mover and the speed governor thereof of the electric power system comprises the following steps of: (1) collecting data; (2) establishing mathematical models of the prime mover and the speed governor thereof; (3) carrying out model selection; (4) carrying out segmented field testing on the prime mover and the speed governor thereof; (5) carrying out segmented parameter recognization to obtain parameters of each segment; (6) screening data before the population parameters are recognized; (7) carrying out population parameter recognization; (8) carrying out model parameter verification; (9) carrying out frequency large-disturbance testing; and (10) carrying out model parameter verification. By means of the actual-measurement modeling method, the models and the parameters can be ensured to be accurately applied to BPA (Bonneviklle Power Administration), PSS / E (Power System Simulator / Engineering) electric power system analysis software, and the electric power system simulation precision is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and relates to a method for modeling a power system prime mover and its governor, which establishes a mathematical model for the power system prime mover and its governor, identifies corresponding parameters, and performs various tests, verify. Background technique [0002] The power system is a large and complex system, and the basic tool for its analysis is digital simulation software. At present, the power system simulation software has the possibility of simulating the operation of the power system in detail, but what is lacking is the model and parameters of the simulation object. [0003] At present, in terms of models, all mainstream power system analysis software (BPA, PSS / E, PSASP, etc.) support a variety of prime movers and their governor models, and can continuously add new model. Generally speaking, these models can meet the needs of power system electromechanical tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K11/02F01D17/00F01D17/10G06F17/50
CPCY02T10/82
Inventor 李继红倪秋龙陆春良叶琳孙维真俞成立顾正皓樊印龙徐政武诚
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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