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A Method of Reducing Power Plant Data Uncertainty Based on Data Coordination

A certainty, power plant technology, used in data processing applications, complex mathematical operations, instruments, etc., can solve the problems of thermal parameter value monitoring results error, measurement error, etc., to improve the effect, reduce random errors, and reduce uncertainty. Effect

Active Publication Date: 2019-09-20
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Accurate online measurement data is an important basis for power plant performance monitoring, and errors in measurement data may lead to errors in thermal parameter values ​​and even monitoring results
However, due to the aging of measuring instruments and other reasons, the original data obtained from power plant measurements always contain measurement errors

Method used

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  • A Method of Reducing Power Plant Data Uncertainty Based on Data Coordination
  • A Method of Reducing Power Plant Data Uncertainty Based on Data Coordination
  • A Method of Reducing Power Plant Data Uncertainty Based on Data Coordination

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Embodiment 1

[0052] The present invention will be described below by taking a 1000MW thermal power unit thermal system as an example. like figure 2 As shown, the key equipment of the thermal system of the power plant includes: boiler (Boiler), generator (Gen), steam turbine high-pressure cylinder (HPT1,HPT2), medium-pressure cylinder (IPT1,IPT2), low-pressure cylinder (LPT1,LPT2,LPT3, LPT4 and LPT5), condenser (Cond), condensate pump (CWP), high pressure feed water heater (HPFW1, HPFW2, HPFW3), low pressure feed water heater (LPFW5, LPFW6, LPFW7 and LPFW8), deaerator (DA) , Feed water pump (FWP), high pressure steam pipeline (HPIPE), reheat steam pipeline (IPIPE), extraction steam pipeline (EP1, EP2, EP3, EP4, EP5, EP6, EP7, EP8). Select appropriate measured variables and unmeasured variables from these devices, and the final number of measured variables is 99, and the number of unmeasured variables is 82.

[0053] According to the measured values ​​of the above-mentioned measured varia...

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Abstract

The invention discloses a method of reducing uncertainty of power plant data based on data reconciliation, which belongs to the field of power plant data processing and modeling. The method comprises technical steps: 1) appropriate measurement variables and non-measurement variables in the system are selected, and uncertainty of measurement values is evaluated; 2) a constraint equation for a thermodynamic system in the power plant is constructed, and an overall working condition precise model is built; 3) redundant measurement information in the system is mined to build a data reconciliation problem; 4) steady-state operating data are selected from a power plant database to be brought to the data reconciliation problem for calculation; and 5) the uncertainty of reconciliation values and the uncertainty of measurement values are compared. The method of the invention has the advantages that no extra cost is added; the constraint relationship of the power plant system and the redundant measurement information are used, influences of random errors in the measurement data are reduced, the uncertainty of the measurement variables is reduced, a better parameter estimation value is given, a more accurate data source is provided for power plant modeling and performance monitoring, the method is low in cost and good in effects, and realization and promotion are facilitated.

Description

technical field [0001] A method for reducing the uncertainty of power plant data based on data coordination belongs to the field of power plant data processing and modeling. Background technique [0002] For a relatively long period of time, thermal power generation still occupies a dominant position in my country's electricity production. A power plant is a complex series-parallel system composed of multiple interrelated subsystems, and its safe and reliable operation is particularly important. Performance monitoring technology is widely used in power plants to ensure their safe operation. Accurate online measurement data is an important basis for power plant performance monitoring, and errors in measurement data may lead to errors in thermal parameter values ​​and even monitoring results. However, due to the aging of measuring instruments and other reasons, the original data obtained from power plant measurement always contain measurement errors. Therefore, data process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/06G06F17/12
Inventor 李政刘培郭思思
Owner TSINGHUA UNIV
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