CN103901068A - Method for monitoring steam turbine low-pressure cylinder exhaust steam enthalpy value online - Google Patents
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
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- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 239000000498 cooling water Substances 0.000 claims description 27
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Abstract
本发明涉及一种汽轮机低压缸排汽焓值的在线监测方法，包括采集所需机组实时运行数据；对接收的传输数据进行重新编码；得出低压加热器组疏水焓值，并将计算结果发送至汽轮机低压缸排汽焓值计算模块和数据存储服务器；得出汽轮机低压缸排汽焓值，并将计算结果发送至系统主显示屏和数据存储服务器；数据存储服务器完成数据的分类和存储；系统主显示屏以表格和曲线的形式同时呈现汽轮机低压缸排汽焓值以及历史运行清洁系数。本发明通过实时计算汽轮机重要运行监视参数，汽轮机低压缸排汽焓值，并以图表和历史曲线的形式呈现给运行人员，帮助运行人员掌握汽轮机实时运行状态。
The invention relates to an online monitoring method for the exhaust steam enthalpy value of the low-pressure cylinder of a steam turbine, which includes collecting the real-time operation data of the required unit; recoding the received transmission data; obtaining the drainage enthalpy value of the low-pressure heater group, and sending the calculation result To the steam turbine low-pressure cylinder exhaust enthalpy calculation module and data storage server; obtain the steam turbine low-pressure cylinder exhaust enthalpy, and send the calculation results to the main display screen of the system and the data storage server; the data storage server completes the classification and storage of data; The main display screen of the system simultaneously presents the exhaust enthalpy value of the low-pressure cylinder of the steam turbine and the cleaning coefficient of historical operation in the form of tables and curves. The invention calculates the important operation monitoring parameters of the steam turbine and the enthalpy value of exhaust steam of the low-pressure cylinder of the steam turbine in real time, and presents them to the operating personnel in the form of charts and historical curves, helping the operating personnel to grasp the real-time operating status of the steam turbine.
Description
Technical field
The invention belongs to thermal power generation field of energy-saving technology, especially a kind of on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value.
Background technology
Turbine low pressure cylinder steam discharge is in wet-steam region, its enthalpy can not calculate by the temperature and pressure of measuring low pressure (LP) cylinder steam discharge according to conventional computing method, and at present ripe and can be applied to the method for engineering field and instrument for testing wet steam humidity without comparison, but exhaust enthalpy of low pressure cylinder of steam turbine value is an important parameter in steam turbine operation process, larger to unit operation economic influence.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, and propose a kind of on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value.
The present invention solves its technical matters and takes following technical scheme to realize:
An on-line monitoring method for exhaust enthalpy of low pressure cylinder of steam turbine value, method step comprises:
(1) data unit operation acquisition module is from the required unit real-time running data of operating unit scattered control system collection of server, and real-time running data is sent to real-time data acquisition net;
(2) real-time data acquisition net carries out recompile to the transmission data that receive, isolation contacts with outside other data transmission network, and recompile result is sent to the hydrophobic enthalpy computing module of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value computing module and data storage server;
(3) the hydrophobic enthalpy computing module of low-pressure heater group calculates Heater group water inlet enthalpy H to receiving data
din, Heater group water outlet enthalpy H
dout, the 1st to the n section enthalpy H that draws gas
1to H
n, and then draw the hydrophobic enthalpy of low-pressure heater group, and result of calculation is sent to exhaust enthalpy of low pressure cylinder of steam turbine value computing module and data storage server;
(4) exhaust enthalpy of low pressure cylinder of steam turbine value computing module is to receiving data computation cycles chilled water water inlet H
in, recirculated cooling water water outlet H
out, condensate water enthalpy H
w, and then draw exhaust enthalpy of low pressure cylinder of steam turbine value, and result of calculation is sent to exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system main display and data storage server;
(5) data storage server receives the data that come from real-time data acquisition net, the hydrophobic enthalpy computing module of low-pressure heater group and exhaust enthalpy of low pressure cylinder of steam turbine value computing module simultaneously, and complete classification and the storage of data, the transferring and subsequent treatment historical data for user of service;
(6) exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system main display presents exhaust enthalpy of low pressure cylinder of steam turbine value and history run cleanliness factor with the form of form and curve simultaneously.
And the unit real-time running data in described step (1) specifically comprises: condenser pressure, condenser hotwell coolant-temperature gage, recirculated cooling water intake pressure and temperature, recirculated cooling water discharge pressure and temperature, Heater group intake pressure, temperature and flow, Heater group discharge pressure and temperature, the 1st are to n section extraction pressure, temperature and flow.
And it is that the condenser pressure of reception, condenser hotwell coolant-temperature gage, recirculated cooling water intake pressure and temperature, recirculated cooling water discharge pressure and temperature, Heater group intake pressure, temperature and flow, Heater group discharge pressure and temperature, the 1st are combined to П system data encoding with time data bag again to n section extraction pressure, temperature and traffic transport data that the transmission data to receiving in described step (2) are carried out recompile.
And the circular of the hydrophobic enthalpy of low-pressure heater group in described step (3) is:
1. Heater group intake pressure P
din, temperature T
din, flow Q
d; Well heater discharge pressure P
dout, T
dout; The 1st to n section extraction pressure P
n, temperature T
n, flow Q
nbe DCS system Real-Time Monitoring amount, gathered by unit real-time running data acquisition module;
2. all can calculate the enthalpy under corresponding states by pressure and temperature according to " the international formulistic council industrial IFC equation in 1967 " for saturated vapour, superheated vapor, saturation water, subcooled water, with formula H=f (P, T) represent, can calculate successively accordingly H
din, H
dout, H
1to H
n;
3. the hydrophobic enthalpy H of low-pressure heater group
scircular be:
And the circular of the exhaust enthalpy of low pressure cylinder of steam turbine value in described step (4) is:
1. condenser pressure P
0, condenser hotwell coolant-temperature gage T
0; Recirculated cooling water intake pressure P
in, temperature T
in, flow Q; Recirculated cooling water discharge pressure P
out, T
outbe DCS system Real-Time Monitoring amount, gathered by unit real-time running data acquisition module;
2. calculate the enthalpy under corresponding states according to " the international formulistic council industrial IFC equation in 1967 " by pressure and temperature, with formula H=f (P, T) expression, can calculate successively accordingly H
in, H
out, condensate water enthalpy H
w;
3. exhaust enthalpy of low pressure cylinder of steam turbine value H
0circular be:
And the concrete sorting technique of Data classification is described in described step (5):
1. data are divided into unit real-time running data and calculation result data, and wherein unit real-time running data comprises: condenser pressure, condenser hotwell coolant-temperature gage, enter/pressure of return water of condenser recirculated cooling water, temperature flow, Heater group inlet/outlet pressure, temperature, flow unit vacuum, each section of pressure drawing gas, temperature and flow; Calculation result data comprises: the hydrophobic enthalpy of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value;
2. because unit real-time running data gathers self-operating unit scattered control system (DCS) server, in notebook data storage server, no longer preserve, only complete calculation result data with time packet stores synchronized.
And, form described in described step (6) specifically comprises condenser pressure, condenser hotwell coolant-temperature gage, enter/pressure of return water of condenser recirculated cooling water, temperature and flow, the hydrophobic enthalpy of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value, and described curve specifically comprises the time dependent curve of exhaust enthalpy of low pressure cylinder of steam turbine value.
Advantage of the present invention and good effect are:
The present invention links together unit real-time running data acquisition module, real-time data acquisition net, the hydrophobic enthalpy computing module of low-pressure heater group, data storage server, exhaust enthalpy of low pressure cylinder of steam turbine value computing module and exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system key frame, forms the on-line monitoring system of exhaust enthalpy of low pressure cylinder of steam turbine value.This system is by calculating in real time the important operation monitoring parameter of steam turbine: exhaust enthalpy of low pressure cylinder of steam turbine value, and present to operations staff with the form of chart and history curve, help operations staff to grasp steam turbine real-time running state.
Accompanying drawing explanation
Fig. 1 is the computing method principle schematic of exhaust enthalpy of low pressure cylinder of steam turbine value of the present invention;
Fig. 2 is the system connection diagram of the on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention process is further described, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value, Method And Principle as shown in Figure 1, system connects as shown in Figure 2, the hardware system that the method is used comprises: unit real-time running data acquisition module, real-time data acquisition net, the hydrophobic enthalpy computing module of low-pressure heater group, data storage server, exhaust enthalpy of low pressure cylinder of steam turbine value computing module, exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system main display and operating unit scattered control system (DCS) server, and the step of the method is as follows:
(1) data unit operation acquisition module is from the required unit real-time running data of operating unit scattered control system (DCS) collection of server, and real-time running data is sent to real-time data acquisition net;
Wherein, unit real-time running data specifically comprises: condenser pressure, condenser hotwell coolant-temperature gage, recirculated cooling water intake pressure and temperature, recirculated cooling water discharge pressure and temperature, Heater group intake pressure, temperature and flow, Heater group discharge pressure and temperature, the 1st are to n section extraction pressure, temperature and flow;
(2) real-time data acquisition net carries out recompile to the transmission data that receive, isolation contacts with outside other data transmission network, and recompile result is sent to the hydrophobic enthalpy computing module of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value computing module and data storage server;
Wherein, the transmission data that receive being carried out to recompile is that the condenser pressure of reception, condenser hotwell coolant-temperature gage, recirculated cooling water intake pressure and temperature, recirculated cooling water discharge pressure and temperature, Heater group intake pressure, temperature and flow, Heater group discharge pressure and temperature, the 1st are combined to П system data encoding with time data bag again to n section extraction pressure, temperature and traffic transport data;
(3) the hydrophobic enthalpy computing module of low-pressure heater group calculates Heater group water inlet enthalpy H to receiving data
din, Heater group water outlet enthalpy H
dout, the 1st to the n section enthalpy H that draws gas
1to H
n, and then draw the hydrophobic enthalpy of low-pressure heater group, and result of calculation is sent to exhaust enthalpy of low pressure cylinder of steam turbine value computing module and data storage server;
Wherein, the circular of the hydrophobic enthalpy of low-pressure heater group is:
1. Heater group intake pressure P
din, temperature T
din, flow Q
d; Well heater discharge pressure P
dout, T
dout; The 1st to n section extraction pressure P
n, temperature T
n, flow Q
nbe DCS system Real-Time Monitoring amount, gathered by unit real-time running data acquisition module;
2. all can calculate the enthalpy under corresponding states by pressure and temperature according to " the international formulistic council industrial IFC equation in 1967 " for saturated vapour, superheated vapor, saturation water, subcooled water, with formula H=f (P, T) represent, can calculate successively accordingly H
din, H
dout, H
1to H
n;
3. the hydrophobic enthalpy H of low-pressure heater group
scircular be:
(4) exhaust enthalpy of low pressure cylinder of steam turbine value computing module is to receiving data computation cycles chilled water water inlet H
in, recirculated cooling water water outlet H
out, condensate water enthalpy H
w, and then draw exhaust enthalpy of low pressure cylinder of steam turbine value, and result of calculation is sent to exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system main display and data storage server,
Wherein, the circular of exhaust enthalpy of low pressure cylinder of steam turbine value is:
1. condenser pressure P
0, condenser hotwell coolant-temperature gage T
0; Recirculated cooling water intake pressure P
in, temperature T
in, flow Q; Recirculated cooling water discharge pressure P
out, T
outbe DCS system Real-Time Monitoring amount, gathered by unit real-time running data acquisition module;
2. calculate the enthalpy under corresponding states according to " the international formulistic council industrial IFC equation in 1967 " by pressure and temperature, with formula H=f (P, T) expression, can calculate successively accordingly H
in, H
out, condensate water enthalpy H
w;
3. exhaust enthalpy of low pressure cylinder of steam turbine value H
0circular be:
(5) data storage server receives the data that come from real-time data acquisition net, the hydrophobic enthalpy computing module of low-pressure heater group and exhaust enthalpy of low pressure cylinder of steam turbine value computing module simultaneously, and complete classification and the storage of data, the transferring and subsequent treatment historical data for user of service;
Wherein, the concrete sorting technique of described Data classification is:
1. data are divided into unit real-time running data and calculation result data, and wherein unit real-time running data comprises: condenser pressure, condenser hotwell coolant-temperature gage, enter/pressure of return water of condenser recirculated cooling water, temperature flow, Heater group inlet/outlet pressure, temperature, flow unit vacuum, each section of pressure drawing gas, temperature and flow; Calculation result data comprises: the hydrophobic enthalpy of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value;
2. because unit real-time running data gathers self-operating unit scattered control system (DCS) server, in notebook data storage server, no longer preserve, only complete calculation result data with time packet stores synchronized;
(6) exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system main display presents exhaust enthalpy of low pressure cylinder of steam turbine value and history run cleanliness factor with the form of form and curve simultaneously;
Wherein, described form specifically comprises condenser pressure, condenser hotwell coolant-temperature gage, enter/pressure of return water of condenser recirculated cooling water, temperature and flow, the hydrophobic enthalpy of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value,
Wherein, described curve specifically comprises the time dependent curve of exhaust enthalpy of low pressure cylinder of steam turbine value.
Claims (7)
1. an on-line monitoring method for exhaust enthalpy of low pressure cylinder of steam turbine value, is characterized in that method step comprises:
(1) data unit operation acquisition module is from the required unit real-time running data of operating unit scattered control system collection of server, and real-time running data is sent to real-time data acquisition net;
(2) real-time data acquisition net carries out recompile to the transmission data that receive, isolation contacts with outside other data transmission network, and recompile result is sent to the hydrophobic enthalpy computing module of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value computing module and data storage server;
(3) the hydrophobic enthalpy computing module of low-pressure heater group calculates Heater group water inlet enthalpy H to receiving data
din, Heater group water outlet enthalpy H
dout, the 1st to the n section enthalpy H that draws gas
1to H
n, and then draw the hydrophobic enthalpy of low-pressure heater group, and result of calculation is sent to exhaust enthalpy of low pressure cylinder of steam turbine value computing module and data storage server;
(4) exhaust enthalpy of low pressure cylinder of steam turbine value computing module is to receiving data computation cycles chilled water water inlet H
in, recirculated cooling water water outlet H
out, condensate water enthalpy H
w, and then draw exhaust enthalpy of low pressure cylinder of steam turbine value, and result of calculation is sent to exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system main display and data storage server;
(5) data storage server receives the data that come from real-time data acquisition net, the hydrophobic enthalpy computing module of low-pressure heater group and exhaust enthalpy of low pressure cylinder of steam turbine value computing module simultaneously, and complete classification and the storage of data, the transferring and subsequent treatment historical data for user of service;
(6) exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system main display presents exhaust enthalpy of low pressure cylinder of steam turbine value and history run cleanliness factor with the form of form and curve simultaneously.
2. the on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value according to claim 1, is characterized in that: the unit real-time running data in described step (1) specifically comprises: condenser pressure, condenser hotwell coolant-temperature gage, recirculated cooling water intake pressure and temperature, recirculated cooling water discharge pressure and temperature, Heater group intake pressure, temperature and flow, Heater group discharge pressure and temperature, the 1st are to n section extraction pressure, temperature and flow.
3. the on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value according to claim 1, is characterized in that: it is that the condenser pressure of reception, condenser hotwell coolant-temperature gage, recirculated cooling water intake pressure and temperature, recirculated cooling water discharge pressure and temperature, Heater group intake pressure, temperature and flow, Heater group discharge pressure and temperature, the 1st are combined to П system data encoding with time data bag again to n section extraction pressure, temperature and traffic transport data that the transmission data to receiving in described step (2) are carried out recompile.
4. the on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value according to claim 1, is characterized in that: the circular of the hydrophobic enthalpy of low-pressure heater group in described step (3) is:
1. Heater group intake pressure P
din, temperature T
din, flow Q
d; Well heater discharge pressure P
dout, T
dout; The 1st to n section extraction pressure P
n, temperature T
n, flow Q
nbe DCS system Real-Time Monitoring amount, gathered by unit real-time running data acquisition module;
2. all can calculate the enthalpy under corresponding states by pressure and temperature according to " the international formulistic council industrial IFC equation in 1967 " for saturated vapour, superheated vapor, saturation water, subcooled water, with formula H=f (P, T) represent, can calculate successively accordingly H
din, H
dout, H
1to H
n;
3. the hydrophobic enthalpy H of low-pressure heater group
scircular be:
5. the on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value according to claim 1, is characterized in that: the circular of the exhaust enthalpy of low pressure cylinder of steam turbine value in described step (4) is:
1. condenser pressure P
0, condenser hotwell coolant-temperature gage T
0; Recirculated cooling water intake pressure P
in, temperature T
in, flow Q; Recirculated cooling water discharge pressure P
out, T
outbe DCS system Real-Time Monitoring amount, gathered by unit real-time running data acquisition module;
2. calculate the enthalpy under corresponding states according to " the international formulistic council industrial IFC equation in 1967 " by pressure and temperature, with formula H=f (P, T) expression, can calculate successively accordingly H
in, H
out, condensate water enthalpy H
w;
3. exhaust enthalpy of low pressure cylinder of steam turbine value H
0circular be:
6. the on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value according to claim 1, is characterized in that: described in described step (5), the concrete sorting technique of Data classification is:
1. data are divided into unit real-time running data and calculation result data, and wherein unit real-time running data comprises: condenser pressure, condenser hotwell coolant-temperature gage, enter/pressure of return water of condenser recirculated cooling water, temperature flow, Heater group inlet/outlet pressure, temperature, flow unit vacuum, each section of pressure drawing gas, temperature and flow; Calculation result data comprises: the hydrophobic enthalpy of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value;
2. because unit real-time running data gathers self-operating unit scattered control system (DCS) server, in notebook data storage server, no longer preserve, only complete calculation result data with time packet stores synchronized.
7. the on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value according to claim 1, it is characterized in that: form described in described step (6) specifically comprises condenser pressure, condenser hotwell coolant-temperature gage, enter/pressure of return water of condenser recirculated cooling water, temperature and flow, the hydrophobic enthalpy of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value, and described curve specifically comprises the time dependent curve of exhaust enthalpy of low pressure cylinder of steam turbine value.
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| CN108931378A (en) * | 2018-09-25 | 2018-12-04 | 国电科学技术研究院有限公司 | A kind of method and device measuring exhaust enthalpy of low pressure cylinder of steam turbine value |
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| CN113076632A (en) * | 2021-03-24 | 2021-07-06 | 中冶华天工程技术有限公司 | Soft measurement method for exhaust enthalpy of steam turbine of saturated steam generator set |
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| CN109211439B (en) * | 2018-10-18 | 2023-08-22 | 国能南京电力试验研究有限公司 | Steam turbine low-pressure cylinder exhaust steam enthalpy value online monitoring system and method |
| CN113076632A (en) * | 2021-03-24 | 2021-07-06 | 中冶华天工程技术有限公司 | Soft measurement method for exhaust enthalpy of steam turbine of saturated steam generator set |
| CN113076632B (en) * | 2021-03-24 | 2024-01-12 | 中冶华天工程技术有限公司 | Steam turbine exhaust enthalpy soft measurement method for saturated steam generator set |
| CN117029910A (en) * | 2023-07-26 | 2023-11-10 | 秦皇岛秦热发电有限责任公司 | Enthalpy exergy monitoring device for thermodynamic system |
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