CN103048020A - Main steam flow online calculation method of power station based on performance testing data - Google Patents
Main steam flow online calculation method of power station based on performance testing data Download PDFInfo
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Abstract
The invention relates to a main steam flow online calculation method of a power station based on performance testing data. In a performance testing, a relation curve of tested main steam flow and electrical load based on calculated main steam flow is drawed, and the tested main steam flow is calculated based on condensed water flow which is measured through ASME (American Society Mechanical Engineers) flow nozzles; in an actual operation, corresponding testing main steam flow on the curve through the electrical load is found out and main operation parameters are corrected to obtain the main steam flow in the actual operation. The calculated main steam flow through the online calculation method is small in deviation and can be consulted and performed economical analysis by power station.
Description
Technical field
The present invention relates to a kind of generating plant main steam flow on-line calculation method based on the performance test data.
Background technology
Main steam flow measuring method of the prior art has:
One, the installation code restriction device is measured, and this measurement is subjected to the restriction of restriction device and transmitter accuracy, and restriction loss is larger, is unfavorable for the economy operation.
Two, reduce restriction loss in order to improve economy, big power station's steam turbine main steam flow is the relation of utilizing first stage pressure and design conditions main steam flow at present, namely calculates according to the Fu Liugeer formula.This computing method are owing to be subjected to design and actual motion Turbine Flow Path discharge characteristic variable effect, the main steam flow that calculates in the actual moving process often with actual flow deviation about 5% even larger, be unfavorable for that power plant moves reference and Energy efficiency evaluation work.
Three, Chinese patent (application number: 201210360382X, patent name: unit station boiler main steam flow processed flexible measurement method), this patent is to calculate main steam flow according to boiler feedwater flow, desuperheating water of superheater flowmeter in rating test, then obtains actual main steam flow carrying out the main steam density revision again.Its shortcoming is that on-the-spot boiler feedwater flow, desuperheating water of superheater flow measurement are often very large with actual deviation, and the method do not consider the low pressure (LP) cylinder exhaust steam pressure to the impact of main steam flow under the same electric load, therefore also is difficult to survey accurate.
Summary of the invention
The purpose of the inventive method is exactly in order to address the above problem, a kind of generating plant main steam flow on-line calculation method based on the performance test data is provided, the method be the condensing water flow in performance test, measured take the ASME flow nozzle on the main steam flow basis that benchmark goes out, revise the main steam flow that obtains in the actual motion in conjunction with actual main operational factor (main steam pressure, main steam temperature, low pressure (LP) cylinder exhaust steam pressure) again.The main steam flow deviation that calculates by the method is less, but electric power supply plant is with reference to carrying out economic analysis.
For achieving the above object, the inventive method adopts following technical scheme:
Based on the generating plant main steam flow on-line calculation method of performance test data, acquisition test main steam pressure p in Turbine Performance Test
Test main vapour, test main steam temperature T
Test main vapour, test low pressure (LP) cylinder exhaust steam pressure p
The test back pressure, the actual main steam pressure p of collection steam turbine in actual conditions
Actual main vapour, actual main steam temperature T
Actual main vapourWith actual low pressure (LP) cylinder discharge pressure p
Actual back pressureThe condensing water flow of measuring take the ASME flow nozzle of system in the performance test of steam turbine is obtained test main steam flow-electric load relation curve as benchmark, calculates corresponding test main steam flow Q by the actual electrical load according to test main steam flow-electric load relation curve
Test main vapour, again to test main steam flow Q
Test main vapourRevise, namely utilize formula to calculate actual main steam flow Q
Actual main vapour
Described formula is as follows:
In the formula 0.008 is low pressure (LP) cylinder exhaust steam pressure correction factor, generally affects 0.8% by 1 kPa and revises, and also can make amendment according to the actual back pressure fair curve of unit.
The acquisition methods of described test main steam flow-electric load relation curve is as follows: the condensing water flow of measuring take the ASME nozzle in the Turbine Performance Test passes through high-pressure heater, oxygen-eliminating device heat Balance Calculation test main steam flow as benchmark, select 50%, 60%, 70%, 80%, 90%, 100% load to carry out experimental test according to Power Plant actual motion scope, main steam pressure is pressed at ordinary times actual pressure curve motion during test, in order to avoid the excessive accuracy in computation that affects of deviation is carried out two hour data collections after operating mode is stable; After test was finished, disposal data calculated the test main steam flow of each operating mode, drew test main steam flow-electric load relation curve.
The information of described data acquisition comprises test main steam pressure, test main steam temperature, test low pressure (LP) cylinder exhaust steam pressure.
Beneficial effect of the present invention:
1, Calculating Foundation is reliable, accurate, and the condensing water flow of measuring take the ASME flow nozzle in the performance test is the more accurately computing method of generally acknowledging as the benchmark main steam flow.
2, computational data is comprehensive, and the main steam flow that do as one likes energy test figure is drawn-electric load relation curve can be according to the main steam flow of all operating conditions of actual electrical load calculating unit.
3, the test main steam flow is carried out main steam pressure, main steam temperature, the correction of low pressure (LP) cylinder exhaust steam pressure, revised main steam flow deviation is less, and modification method is simple, convenient operation.
Description of drawings
The 670MW of Fig. 1 power plant unit test main steam flow-electric load curve synoptic diagram.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Based on the generating plant main steam flow on-line calculation method of performance test data, acquisition test main steam pressure p in Turbine Performance Test
Test main vapour, test main steam temperature T
Test main vapour, test low pressure (LP) cylinder exhaust steam pressure p
The test back pressure, the actual main steam pressure p of collection steam turbine in actual conditions
Actual main vapour, actual main steam temperature T
Actual main vapourWith actual low pressure (LP) cylinder discharge pressure p
Actual back pressureThe condensing water flow of measuring take the ASME flow nozzle of system in the performance test of steam turbine is obtained test main steam flow-electric load relation curve as benchmark, calculates corresponding test main steam flow Q by the actual electrical load according to test main steam flow-electric load relation curve
Test main vapour, again to test main steam flow Q
Test main vapourRevise, namely utilize formula to calculate actual main steam flow Q
Actual main vapour
Described formula is as follows:
Q
Actual main vapour-actual main steam flow; Q
Test main vapour-test main steam flow;
p
Actual main vapour-actual main steam pressure (absolute pressure); p
Test main vapour-test main steam pressure (absolute pressure);
T
Test main vapour-test main steam temperature (Kelvin temperature); T
Actual main vapour-actual main steam temperature (Kelvin temperature);
p
Actual back pressure-actual low pressure (LP) cylinder exhaust steam pressure; p
The test back pressure-test low pressure (LP) cylinder exhaust steam pressure.
The acquisition methods of described test main steam flow-electric load relation curve is as follows: the condensing water flow of measuring take the ASME nozzle in the Turbine Performance Test passes through high-pressure heater, oxygen-eliminating device heat Balance Calculation test main steam flow as benchmark, select 50%, 60%, 70%, 80%, 90%, 100% load to carry out experimental test according to Power Plant actual motion scope, main steam pressure is pressed at ordinary times actual pressure curve motion during test, carries out two hour data collections after operating mode is stable; After test was finished, disposal data calculated the test main steam flow of each operating mode, drew test main steam flow-electric load relation curve.
The information of described data acquisition comprises test main steam pressure, test main steam temperature, test low pressure (LP) cylinder exhaust steam pressure etc.
Embodiment: certain 670MW of power plant power generator turbine Performance Assessment test figure such as table 1.Can draw test main steam flow-electric load curve as shown in Figure 1 according to these table data, and search therein the major parameter of operating condition of test.As shown in Figure 1, test main steam flow-electric load curve can be by test main steam flow corresponding to actual load calculating according to the formula of this curve.
Table 1
Another 500MW operating mode is calculated actual main steam flow as example and is compared in the performance test, and this duty parameter is as shown in table 2.
Table 2
Computing method of the present invention: trying to achieve corresponding test main steam flow according to test main steam flow-electric load curve first is 151752.5kg/h, selects test 80% electric load operating mode according to formula nearby again
Calculating actual main steam flow is 1473421.4kg/h, and with the main steam flow 1480747.7kg/h deviation 0.495% of calculating in the performance test, the result shows relatively other main steam flow computing method, and the present invention is comparatively accurate.
Although above-mentionedly by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not construed as limiting the scope of the present invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (3)
1. based on the generating plant main steam flow on-line calculation method of performance test data, it is characterized in that acquisition test main steam pressure p in Turbine Performance Test
Test main vapour, test main steam temperature T
Test main vapour, test low pressure (LP) cylinder exhaust steam pressure p
The test back pressure, the actual main steam pressure p of collection steam turbine in actual conditions
Actual main vapour, actual main steam temperature T
Actual main vapourWith actual low pressure (LP) cylinder discharge pressure p
Actual back pressureThe condensing water flow of measuring take the ASME flow nozzle of system in the performance test of steam turbine is obtained test main steam flow-electric load relation curve as benchmark, calculates corresponding test main steam flow Q by the actual electrical load according to test main steam flow-electric load relation curve
Test main vapour, again to test main steam flow Q
Test main vapourRevise, namely utilize formula to calculate actual main steam flow Q
Actual main vapour
Described formula is as follows:
2. the generating plant main steam flow on-line calculation method based on the performance test data as claimed in claim 1, it is characterized in that, the acquisition methods of described test main steam flow-electric load relation curve is as follows: the condensing water flow of measuring take the ASME nozzle in the Turbine Performance Test passes through high-pressure heater as benchmark, oxygen-eliminating device heat Balance Calculation test main steam flow, select 50% according to Power Plant actual motion scope, 60%, 70%, 80%, 90%, 100% load carries out experimental test, main steam pressure is pressed at ordinary times actual pressure curve motion during test, carries out two hour data collections after operating mode is stable; After test was finished, disposal data calculated the test main steam flow of each operating mode, drew test main steam flow-electric load relation curve.
3. the generating plant main steam flow on-line calculation method based on the performance test data as claimed in claim 1 is characterized in that, the information of described data acquisition comprises test main steam pressure, test main steam temperature, test low pressure (LP) cylinder exhaust steam pressure.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034521A (en) * | 2014-05-22 | 2014-09-10 | 国家电网公司 | New method for measuring turbine valve flow characteristics |
| CN104048842A (en) * | 2014-05-29 | 2014-09-17 | 华中科技大学 | On-line monitoring method for heat rate of steam turbine on basis of soft measurement technology |
| CN104748807A (en) * | 2014-12-12 | 2015-07-01 | 东南大学 | Online power station main steam flow calculation method based on flow correction |
| CN105157763A (en) * | 2015-09-17 | 2015-12-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Measurement method and measurement system for main steam flow of gas-steam combined cycle power plant |
| CN105201564A (en) * | 2015-08-26 | 2015-12-30 | 国网河南省电力公司电力科学研究院 | Main-steam-flow-based steam turbine sliding pressure optimization control method |
| CN105225008A (en) * | 2015-10-08 | 2016-01-06 | 苏州西热节能环保技术有限公司 | A kind of method predicting thermodynamic system of steam tur internal operation parameter |
| CN105841781A (en) * | 2016-03-16 | 2016-08-10 | 中国大唐集团科学技术研究院有限公司华东分公司 | Steam turbine heat supply steam flow calibration method |
| CN105865586A (en) * | 2016-04-26 | 2016-08-17 | 中国大唐集团科学技术研究院有限公司华东分公司 | Online calibration method of steam turbine intermediate-pressure heat exhaust and supply steam flow |
| CN106679747A (en) * | 2016-12-20 | 2017-05-17 | 河北省电力建设调整试验所 | On-line checking method for turbo-generator set boiler inlet feed water flow |
| CN107543733A (en) * | 2017-03-10 | 2018-01-05 | 国电科学技术研究院 | A kind of condenser duty on-line monitoring system and measuring method |
| CN111351531A (en) * | 2020-03-16 | 2020-06-30 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Main steam flow online measurement method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073773A (en) * | 2011-01-18 | 2011-05-25 | 王卫良 | Main steam pressure tracking optimization method for steam turbine |
| CN102735449A (en) * | 2012-06-29 | 2012-10-17 | 山东电力集团公司电力科学研究院 | Method for detecting influence of reheated attemperating water provided by center tap of feeding pump on performance of unit |
| CN102840889A (en) * | 2012-09-25 | 2012-12-26 | 华北电力大学（保定） | Soft measuring method for main steam flow of unit system utility boiler |
-
2013
- 2013-01-22 CN CN201310023911.1A patent/CN103048020B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073773A (en) * | 2011-01-18 | 2011-05-25 | 王卫良 | Main steam pressure tracking optimization method for steam turbine |
| CN102735449A (en) * | 2012-06-29 | 2012-10-17 | 山东电力集团公司电力科学研究院 | Method for detecting influence of reheated attemperating water provided by center tap of feeding pump on performance of unit |
| CN102840889A (en) * | 2012-09-25 | 2012-12-26 | 华北电力大学（保定） | Soft measuring method for main steam flow of unit system utility boiler |
Non-Patent Citations (1)
| Title |
|---|
| 孙永平等: "北仑电厂2号机组DAS***主蒸汽流量计算模型的修改", 《浙江电力》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104034521A (en) * | 2014-05-22 | 2014-09-10 | 国家电网公司 | New method for measuring turbine valve flow characteristics |
| CN104048842B (en) * | 2014-05-29 | 2017-03-01 | 华中科技大学 | A kind of thermal loss of steam turbine rate on-line monitoring method based on soft-measuring technique |
| CN104048842A (en) * | 2014-05-29 | 2014-09-17 | 华中科技大学 | On-line monitoring method for heat rate of steam turbine on basis of soft measurement technology |
| CN104748807A (en) * | 2014-12-12 | 2015-07-01 | 东南大学 | Online power station main steam flow calculation method based on flow correction |
| CN104748807B (en) * | 2014-12-12 | 2017-11-03 | 东南大学 | A kind of power station main steam flow on-line calculation method based on flux modification |
| CN105201564A (en) * | 2015-08-26 | 2015-12-30 | 国网河南省电力公司电力科学研究院 | Main-steam-flow-based steam turbine sliding pressure optimization control method |
| CN105157763A (en) * | 2015-09-17 | 2015-12-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Measurement method and measurement system for main steam flow of gas-steam combined cycle power plant |
| CN105225008A (en) * | 2015-10-08 | 2016-01-06 | 苏州西热节能环保技术有限公司 | A kind of method predicting thermodynamic system of steam tur internal operation parameter |
| CN105841781A (en) * | 2016-03-16 | 2016-08-10 | 中国大唐集团科学技术研究院有限公司华东分公司 | Steam turbine heat supply steam flow calibration method |
| CN105841781B (en) * | 2016-03-16 | 2018-09-28 | 中国大唐集团科学技术研究院有限公司华东分公司 | A method of calibration steam turbine heating steam flow |
| CN105865586A (en) * | 2016-04-26 | 2016-08-17 | 中国大唐集团科学技术研究院有限公司华东分公司 | Online calibration method of steam turbine intermediate-pressure heat exhaust and supply steam flow |
| CN105865586B (en) * | 2016-04-26 | 2018-12-28 | 中国大唐集团科学技术研究院有限公司华东分公司 | Heating steam flow online calibration method is arranged in a kind of steam turbine |
| CN106679747A (en) * | 2016-12-20 | 2017-05-17 | 河北省电力建设调整试验所 | On-line checking method for turbo-generator set boiler inlet feed water flow |
| CN106679747B (en) * | 2016-12-20 | 2018-09-21 | 河北省电力建设调整试验所 | A kind of on-line testing method of Turbo-generator Set boiler inlet feedwater flow |
| CN107543733A (en) * | 2017-03-10 | 2018-01-05 | 国电科学技术研究院 | A kind of condenser duty on-line monitoring system and measuring method |
| CN111351531A (en) * | 2020-03-16 | 2020-06-30 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Main steam flow online measurement method |
| CN111351531B (en) * | 2020-03-16 | 2021-11-12 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Main steam flow online measurement method |
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