CN103901068B - The on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value - Google Patents

The on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value Download PDF

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CN103901068B
CN103901068B CN201410156414.3A CN201410156414A CN103901068B CN 103901068 B CN103901068 B CN 103901068B CN 201410156414 A CN201410156414 A CN 201410156414A CN 103901068 B CN103901068 B CN 103901068B
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enthalpy
pressure
steam turbine
data
temperature
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CN103901068A (en
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张利
张宇
周连升
刘卫平
甘智勇
王建
何少聪
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
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Abstract

The present invention relates to the on-line monitoring method of a kind of exhaust enthalpy of low pressure cylinder of steam turbine value, including gathering required unit real-time running data;The transmission data received are recompiled;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;Draw exhaust enthalpy of low pressure cylinder of steam turbine value, and result of calculation is sent to system main display and data storage server;Data storage server completes classification and the storage of data;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.The present invention is by calculating steam turbine important operation monitoring parameter, exhaust enthalpy of low pressure cylinder of steam turbine value in real time, and presents to operations staff with the form of chart and history curve, helps operations staff to grasp steam turbine real-time running state.

Description

The on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value
Technical field
The invention belongs to thermal power generation field of energy-saving technology, the on-line monitoring method of a kind of exhaust enthalpy of low pressure cylinder of steam turbine value.
Background technology
Turbine low pressure cylinder steam discharge is in wet-steam region, and its enthalpy can not be according to conventional computational methods by measuring low pressure (LP) cylinder steam discharge Temperature and pressure calculate, and currently without comparative maturity with the method for engineering field and instrument can be applied to for testing Moist steam humidity, but exhaust enthalpy of low pressure cylinder of steam turbine value is an important parameter during steam turbine operation, to unit operation warp The impact of Ji property is bigger.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, and propose the on-line monitoring side of a kind of exhaust enthalpy of low pressure cylinder of steam turbine value Method.
The present invention solves it and technical problem is that and take techniques below scheme to realize:
A kind of on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value, method step includes:
(1) data unit operation acquisition module unit real-time running data needed for operating unit scattered control system collection of server, And real-time running data is sent to real-time data acquisition net;
(2) the transmission data received are recompiled by real-time data acquisition net, isolation and the connection of other data transmission network outside System, and result transmission will be recompiled to low-pressure heater group hydrophobic enthalpy computing module, the calculating of exhaust enthalpy of low pressure cylinder of steam turbine value Module and data storage server;
(3) low-pressure heater group hydrophobic enthalpy computing module calculates heater group water inlet enthalpy H to receiving datadin, heater group water outlet Enthalpy Hdout, 1 to n section draws gas enthalpy H1To Hn, and then draw the hydrophobic enthalpy of low-pressure heater group, and result of calculation is sent out Deliver 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 calculates recirculated cooling water water inlet H to receiving datain, recirculated cooling water water outlet Hout, condense water enthalpy Hw, and then draw exhaust enthalpy of low pressure cylinder of steam turbine value, and result of calculation is sent to turbine low pressure cylinder row Vapour enthalpy on-line monitoring system main display and data storage server;
Data storage server receive simultaneously come from real-time data acquisition net, low-pressure heater group hydrophobic enthalpy computing module and The data of exhaust enthalpy of low pressure cylinder of steam turbine value computing module, and complete classification and the storage of data, for user of service to history number According to transfer and subsequent treatment;
(6) to present steam turbine with the form of form and curve low simultaneously for exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system main display Cylinder pressure steam discharge enthalpy and history run cleanliness factor.
And, the unit real-time running data in described step (1) specifically includes: 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, 1 to n section extraction pressure, temperature and flow.
And, reception is transmitted data and recompiles in described step (2) is by the condenser pressure received, condensing Device hot well coolant-temperature gage, recirculated cooling water intake pressure and temperature, recirculated cooling water discharge pressure and temperature, heater group influent pressure Power, temperature and flow, heater group discharge pressure and temperature, 1 to n section extraction pressure, temperature and flow transmission data weight New and time data bag is combined П binary data coding.
And, the circular of the hydrophobic enthalpy of low-pressure heater group in described step (3) is:
1. heater group intake pressure Pdin, temperature Tdin, flow Qd;Heater discharge pressure Pdout、Tdout;1 to n section is taken out Steam pressure Pn, temperature Tn, flow QnIt is the real-time monitoring variable of DCS system, unit real-time running data acquisition module gathers;
2. all can be according to " international formulation committee work in 1967 for saturated vapor, superheated steam, saturation water, subcooled water Industry IFC equation " enthalpy that is calculated under corresponding states by pressure and temperature, represent with formula H=f (P, T), accordingly may be used Calculate H successivelydin、Hdout、H1To Hn
3. low-pressure heater group hydrophobic enthalpy HsCircular be:
H s = Q d · ( H dout - H din ) - Σ i = 1 i = n Q i · H i Σ i = 1 i = n Q i .
And, the circular of the exhaust enthalpy of low pressure cylinder of steam turbine value in described step (4) is:
1. condenser pressure P0, condenser hotwell coolant-temperature gage T0;Recirculated cooling water intake pressure Pin, temperature Tin, flow Q;Follow Ring cooling water discharge pressure Pout、ToutIt is the real-time monitoring variable of DCS system, unit real-time running data acquisition module gathers;
2. it is calculated under corresponding states by pressure and temperature according to " international formulation committee industrial IFC equation in 1967 " Enthalpy, with formula H=f (P, T) represent, H can be calculated accordingly successivelyin、Hout, condense water enthalpy Hw
3. exhaust enthalpy of low pressure cylinder of steam turbine value H0Circular be:
H 0 = Q · ( H out - H in ) + H w · Q d - Σ i = 1 i = n Q i · H s Q d - Σ i = 1 i = n Q i .
And, the concrete sorting technique of the classification of data described in described step (5) is:
1. data are divided into unit real-time running data and calculation result data, and wherein unit real-time running data includes: condenser pressure Power, condenser hotwell coolant-temperature gage, condenser recirculated cooling water enter/pressure of return water, temperature flow, heater group inlet/outlet pressure, Temperature, flow unit vacuum, each section of pressure drawn gas, temperature and flow;Calculation result data includes: low-pressure heater group is dredged Water enthalpy, exhaust enthalpy of low pressure cylinder of steam turbine value;
2. self-operating unit scattered control system (DCS) server is gathered due to unit real-time running data, at notebook data storage clothes Business device no longer preserves, only completes calculation result data and store with time packet synchronisation.
And, form described in described step (6) specifically includes condenser pressure, condenser hotwell coolant-temperature gage, condenser circulation Cooling water enters/pressure of return water, temperature and flow, the hydrophobic enthalpy of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value, described song Line specifically includes the time dependent curve of exhaust enthalpy of low pressure cylinder of steam turbine value.
Advantages of the present invention and good effect be:
Unit real-time running data acquisition module, real-time data acquisition net, the hydrophobic enthalpy of low-pressure heater group are calculated mould by the present invention Block, 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 System key frame links together, and constitutes the on-line monitoring system of exhaust enthalpy of low pressure cylinder of steam turbine value.This system is by calculating vapour in real time Turbine important operation monitoring parameter: exhaust enthalpy of low pressure cylinder of steam turbine value, and present to run people with the form of chart and history curve Member, helps operations staff to grasp steam turbine real-time running state.
Accompanying drawing explanation
Fig. 1 is the computational methods 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.
Detailed description of the invention
Implementing to be further described to the present invention below in conjunction with accompanying drawing, following example are illustrative, are not determinate, Protection scope of the present invention can not be limited with this.
The on-line monitoring method of a kind of exhaust enthalpy of low pressure cylinder of steam turbine value, Method And Principle is as it is shown in figure 1, system connects such as Fig. 2 institute Showing, the hardware system that the method uses includes: unit real-time running data acquisition module, real-time data acquisition net, low-pressure heating Device group hydrophobic enthalpy computing module, data storage server, exhaust enthalpy of low pressure cylinder of steam turbine value computing module, turbine low pressure cylinder Steam discharge enthalpy on-line monitoring system main display and operating unit scattered control system (DCS) server, the step of the method is as follows:
(1) data unit operation acquisition module unit real time execution needed for operating unit scattered control system (DCS) collection of server Data, and real-time running data is sent to real-time data acquisition net;
Wherein, unit real-time running data specifically includes: condenser pressure, condenser hotwell coolant-temperature gage, recirculated cooling water are intake Pressure and temperature, recirculated cooling water discharge pressure and temperature, heater group intake pressure, temperature and flow, heater group water outlet Pressure and temperature, 1 to n section extraction pressure, temperature and flow;
(2) the transmission data received are recompiled by real-time data acquisition net, isolation and the connection of other data transmission network outside System, and result transmission will be recompiled to low-pressure heater group hydrophobic enthalpy computing module, the calculating of exhaust enthalpy of low pressure cylinder of steam turbine value Module and data storage server;
Wherein, reception to be transmitted data and recompiles be by the condenser pressure of reception, condenser hotwell coolant-temperature gage, follow Ring 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, 1 to n section extraction pressure, temperature and flow transmission data are entered with time data bag again Row combination П binary data coding;
(3) low-pressure heater group hydrophobic enthalpy computing module calculates heater group water inlet enthalpy H to receiving datadin, heater group water outlet Enthalpy Hdout, 1 to n section draws gas enthalpy H1To Hn, and then draw the hydrophobic enthalpy of low-pressure heater group, and result of calculation is sent out Deliver 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 Pdin, temperature Tdin, flow Qd;Heater discharge pressure Pdout、Tdout;1 to n section is taken out Steam pressure Pn, temperature Tn, flow QnIt is the real-time monitoring variable of DCS system, unit real-time running data acquisition module gathers;
2. all can be according to " international formulation committee work in 1967 for saturated vapor, superheated steam, saturation water, subcooled water Industry IFC equation " enthalpy that is calculated under corresponding states by pressure and temperature, represent with formula H=f (P, T), accordingly may be used Calculate H successivelydin、Hdout、H1To Hn
3. low-pressure heater group hydrophobic enthalpy HsCircular be:
H s = Q d · ( H dout - H din ) - Σ i = 1 i = n Q i · H i Σ i = 1 i = n Q i
(4) exhaust enthalpy of low pressure cylinder of steam turbine value computing module calculates recirculated cooling water water inlet H to receiving datain, recirculated cooling water water outlet Hout, condense water enthalpy Hw, and then draw exhaust enthalpy of low pressure cylinder of steam turbine value, and result of calculation is sent to turbine low pressure cylinder row Vapour enthalpy 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 P0, condenser hotwell coolant-temperature gage T0;Recirculated cooling water intake pressure Pin, temperature Tin, flow Q;Follow Ring cooling water discharge pressure Pout、ToutIt is the real-time monitoring variable of DCS system, unit real-time running data acquisition module gathers;
2. it is calculated under corresponding states by pressure and temperature according to " international formulation committee industrial IFC equation in 1967 " Enthalpy, with formula H=f (P, T) represent, H can be calculated accordingly successivelyin、Hout, condense water enthalpy Hw
3. exhaust enthalpy of low pressure cylinder of steam turbine value H0Circular be:
H 0 = Q · ( H out - H in ) + H w · Q d - Σ i = 1 i = n Q i · H s Q d - Σ i = 1 i = n Q i
Data storage server receive simultaneously come from real-time data acquisition net, low-pressure heater group hydrophobic enthalpy computing module and The data of exhaust enthalpy of low pressure cylinder of steam turbine value computing module, and complete classification and the storage of data, for user of service to history number According to transfer and subsequent treatment;
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 includes: condenser pressure Power, condenser hotwell coolant-temperature gage, condenser recirculated cooling water enter/pressure of return water, temperature flow, heater group inlet/outlet pressure, Temperature, flow unit vacuum, each section of pressure drawn gas, temperature and flow;Calculation result data includes: low-pressure heater group is dredged Water enthalpy, exhaust enthalpy of low pressure cylinder of steam turbine value;
2. self-operating unit scattered control system (DCS) server is gathered due to unit real-time running data, at notebook data storage clothes Business device no longer preserves, only completes calculation result data and store with time packet synchronisation;
(6) to present steam turbine with the form of form and curve low simultaneously for exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system main display Cylinder pressure steam discharge enthalpy and history run cleanliness factor;
Wherein, described form specifically includes condenser pressure, condenser hotwell coolant-temperature gage, condenser recirculated cooling water enter/backwater pressure Power, 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 includes 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, the method step includes:
(1) data unit operation acquisition module unit real-time running data needed for operating unit scattered control system collection of server, And real-time running data is sent to real-time data acquisition net;It is characterized in that the method step may further comprise:
(2) the transmission data received are recompiled by real-time data acquisition net, isolation and the connection of other data transmission network outside System, and result transmission will be recompiled to low-pressure heater group hydrophobic enthalpy computing module, the calculating of exhaust enthalpy of low pressure cylinder of steam turbine value Module and data storage server;
(3) low-pressure heater group hydrophobic enthalpy computing module calculates heater group water inlet enthalpy H to receiving datadin, heater group water outlet Enthalpy Hdout, 1 to n section draws gas enthalpy H1To Hn, and then draw the hydrophobic enthalpy of low-pressure heater group, and result of calculation is sent out Deliver 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 calculates recirculated cooling water water inlet H to receiving datain, recirculated cooling water water outlet Hout, condense water enthalpy Hw, and then draw exhaust enthalpy of low pressure cylinder of steam turbine value, and result of calculation is sent to turbine low pressure cylinder row Vapour enthalpy on-line monitoring system main display and data storage server;
Data storage server receive simultaneously come from real-time data acquisition net, low-pressure heater group hydrophobic enthalpy computing module and The data of exhaust enthalpy of low pressure cylinder of steam turbine value computing module, and complete classification and the storage of data, for user of service to history number According to transfer and subsequent treatment;
(6) to present steam turbine with the form of form and curve low simultaneously for exhaust enthalpy of low pressure cylinder of steam turbine value on-line monitoring system main display Cylinder pressure steam discharge enthalpy and history run cleanliness factor.
The on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value the most according to claim 1, it is characterised in that: described step Suddenly the unit real-time running data in (1) specifically includes: condenser pressure, condenser hotwell coolant-temperature gage, recirculated cooling water are intake Pressure and temperature, recirculated cooling water discharge pressure and temperature, heater group intake pressure, temperature and flow, heater group water outlet Pressure and temperature, 1 to n section extraction pressure, temperature and flow.
The on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value the most according to claim 1, it is characterised in that: described step Suddenly reception is transmitted data and recompiles in (2) is by the condenser pressure of reception, condenser hotwell coolant-temperature gage, follows Ring 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, 1 to n section extraction pressure, temperature and flow transmission data are entered with time data bag again Row combination П binary data coding.
The on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value the most according to claim 1, it is characterised in that: described step Suddenly the circular of the hydrophobic enthalpy of low-pressure heater group in (3) is:
1. heater group intake pressure Pdin, temperature Tdin, flow Qd;Heater discharge pressure Pdout、Tdout;1 to n section is taken out Steam pressure Pn, temperature Tn, flow QnIt is the real-time monitoring variable of DCS system, unit real-time running data acquisition module gathers;
2. for saturated vapor, superheated steam, saturation water, subcooled water all in accordance with " international formulation committee 1967 is industrial IFC equation " enthalpy that is calculated under corresponding states by pressure and temperature, represent with formula H=f (P, T), calculate the most successively Go out Hdin、Hdout、H1To Hn
3. low-pressure heater group hydrophobic enthalpy HsCircular be:
H s = Q d · ( H d o u t - H d i n ) - Σ i = 1 i = n Q i · H i Σ i = 1 i = n Q i .
The on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value the most according to claim 1, it is characterised in that: described step Suddenly the circular of the exhaust enthalpy of low pressure cylinder of steam turbine value in (4) is:
1. condenser pressure P0, condenser hotwell coolant-temperature gage T0;Recirculated cooling water intake pressure Pin, temperature Tin, flow Q;Follow Ring cooling water discharge pressure Pout、ToutIt is the real-time monitoring variable of DCS system, unit real-time running data acquisition module gathers;
2. it is calculated under corresponding states by pressure and temperature according to " international formulation committee industrial IFC equation in 1967 " Enthalpy, with formula H=f (P, T) represent, H can be calculated accordingly successivelyin、Hout, condense water enthalpy Hw
3. exhaust enthalpy of low pressure cylinder of steam turbine value H0Circular be:
H 0 = Q · ( H o u t - H i n ) + H w · Q d - Σ i = 1 i = n Q i · H s Q d - Σ i = 1 i = n Q i .
The on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value the most according to claim 1, it is characterised in that: described step Suddenly the concrete sorting technique of the classification of data described in (5) is:
1. data are divided into unit real-time running data and calculation result data, and wherein unit real-time running data includes: condenser pressure Power, condenser hotwell coolant-temperature gage, condenser recirculated cooling water enter/pressure of return water, temperature flow, heater group inlet/outlet pressure, Temperature, flow unit vacuum, each section of pressure drawn gas, temperature and flow;Calculation result data includes: low-pressure heater group is dredged Water enthalpy, exhaust enthalpy of low pressure cylinder of steam turbine value;
2. self-operating unit scattered control system (DCS) server is gathered due to unit real-time running data, at notebook data storage clothes Business device no longer preserves, only completes calculation result data and store with time packet synchronisation.
The on-line monitoring method of exhaust enthalpy of low pressure cylinder of steam turbine value the most according to claim 1, it is characterised in that: described step Suddenly form described in (6) specifically includes condenser pressure, condenser hotwell coolant-temperature gage, condenser recirculated cooling water enter/backwater pressure Power, temperature and flow, the hydrophobic enthalpy of low-pressure heater group, exhaust enthalpy of low pressure cylinder of steam turbine value, described curve specifically includes steamer The machine low pressure (LP) cylinder time dependent curve of steam discharge enthalpy.
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CN106895977B (en) * 2017-03-13 2019-05-28 华北电力大学 A kind of low pressure (LP) cylinder final stage exhaust enthalpy measuring device and calculation method
CN108931378B (en) * 2018-09-25 2024-01-05 国家能源集团科学技术研究院有限公司 Method and device for measuring exhaust enthalpy value of low-pressure cylinder of steam turbine
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