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

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

Active Publication Date: 2014-04-02
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

[0114] Modeling and parameter identification of the prime mover and its governor for a 600MW unit in a power plant, the steps are as follows:

[0115] 1. Data collection

[0116]

[0117]

[0118] 2. Model selection

[0119] The unit is a coal-fired unit. For parameter identification by link, use GX, GK, GA, and TB cards in combination for BPA, and TGOV5 model for PSS / E; for overall parameter identification, use GI\GI+, GA, and TB cards in combination for BPA, and for PSS / E selects the GGOV1 model.

[0120] 3. Carry out field tests in sub-links. Several tests were carried out when the active power of the generator was 450MW, 500MW and 550MW, as follows:

[0121]

450MW

500MW

550MW

Valve step in open loop mode

2 times

1 time

1 time

Fuel step in open loop mode

1 time

2 times

1 time

Valve Step in Coordinated Control Mode

1 time

1 time

1 time

[0122] At 450MW, the valve step...

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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 mover and governor models, and can continuously add new model. Generally speaking, these models can meet the needs of power system electromechanical transient...

Claims

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Application Information

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Patent Type & Authority Patents(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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