CN103512768A - System and method for monitoring performance of thermal power generating unit - Google Patents

Abstract

The embodiment of the invention provides a system and method for monitoring performance of a thermal power generating unit. The system comprises a wireless collection device, a processing device and a switching device. The wireless collection device is connected with a waste-heat utilization system of the thermal power generating unit and used for collecting unit operation parameters of the waste-heat utilization system of the thermal power generating unit. The unit operation parameters comprise drive steam pressure, condensation water pressure and condensation water flow, and are sent to the processing device. The processing device sets up a characteristic vector set between the energy consumption characteristic and the unit operation parameters of the thermal power generating unit and then obtains the net coal consumption rate and the performance of the thermal power generating unit. The switching device is connected with the processing device and used for carrying out switching according to the obtained performance of the thermal power generating unit through the processing device. The wireless collection device is used for accurately collecting data in real time. The performance of the thermal power generating unit under different work conditions can be determined according to units of different types, and operation investment and switching can be reasonably arranged.

Description

A kind of monitoring system of Fossil-fired Unit Performance and method

Technical field

The present invention relates to thermal power generation field, specifically a kind of monitoring system of Fossil-fired Unit Performance and method.

Background technology

Along with the aggravation of worldwide energy scarcity and market competition, energy-saving and cost-reducing oneself becomes the main target that work in every is carried out in various countries Utilities Electric Co. and power station.As far back as the initial stage eighties, U.S. EPRI comprehensively investigates and studies all coal-burning power plants, the whole America, thinks that the adjustment research of unit operation mode has comparatively considerable energy-saving potential.

Saving the energy, reduce energy consumption, is a long-term fundamental state policy of China equally.Power plant is the big power consumer who consumes primary energy and produce secondary energy, and the annual coal amount consuming accounts for 1/2nd of national coal production, even more, so power industry is energy-conservation, especially power plant for energy conservation work carry out significant.Along with further going deep into of electric utility reform, electric power enterprise must be in the face of more severe market test.The implementation of series of measures such as " separate the factory and network; surf the Net at a competitive price ", forces each electric power enterprise from number one, and multi-angle considers how conscientiously to reduce power plant's operating cost profoundly, extend serviceable life and the time between overhauls(TBO) of unit, safety and economic operation, realize modern management.Thereby realize to promote the sustainable development of China's power industry, meet the demand of economic development to electric power, guarantee stable, the sufficient supplies of electric power, set up resource-conserving, environmentally friendly power industry.Along with the increase gradually of energy-saving and cost-reducing pressure, electricity power enterprise is development of latent energy-saving potential in all its bearings.

At present, the major way of electricity power enterprise's UTILIZATION OF VESIDUAL HEAT IN has residual heat from boiler fume recycling and utilizes absorption heat pump to carry out UTILIZATION OF VESIDUAL HEAT IN etc., and this is all the effective means that improves unit cycle efficieny, thereby as promoting one of conservation measures that electricity power enterprise raises the efficiency.

Fume afterheat recycling is from since the fifties in last century, on 6.0～1000MW grade station boiler, carried out exploring widely, obtained certain achievement, but compare the larger gap of existence with external advanced design, since the nineties in last century, the country such as Russian, German is according to the variation of energy prices and environmental requirement, and exhaust gas temperature design load is reduced to 100 ℃, and in new-built unit or old Transformation of Unit, obtained engineering verification, net coal consumption rate decline 6～7g/kWh.According to the principle of energy level and systems engineering, current a kind of degree of depth recovery boiler smoke exhaust heat improves the system of unit cycle efficieny, as shown in Figure 1, this system consists of four parts: flue gas degree of depth cooling unit 11, air heat front preheating process device unit 12, bypass high-pressure feed water unit 13 and bypass high pressure condensate water unit 14.After electric precipitator, 125 ℃ of cigarette temperature are cooled to 90 ℃ by the gas cooler degree of depth, reclaim heat and pass to hot water matchmaker 15, and hot water matchmaker transfers heat to air by air heat front preheating process device unit 12, and air themperature rises to 60 ℃ by 20 ℃; Bypass flue is drawn 19% 380 ℃ of high temperature flue-gas from boiler heated feed waters and condensate water from economizer 16, and boiler smoke temperature is cooled to 125 ℃.

Another kind of bootstrap system is to adopt absorption heat pump to reclaim recirculated water heat, as shown in Figure 2, using recirculated cooling water as low-temperature heat source, using the drawing gas as driving heat source of 0.35MPa, heating can be heated to 50～80 ℃ of left and right with heat exchangers for district heating by backwater, recirculated cooling water goes condenser to recycle as cold medium after reducing again, improves the utilization of Liao Quan factory thermal source.The lithium bromide absorption type heat pump that bootstrap system adopts has larger power savings advantages, and heat pump Energy Efficiency Ratio COP is generally in 1.65～1.85 left and right.Heat supply network major network water return pipeline heats up by absorption heat pump, and thermal source utilizes Steam Turbine to draw gas and closed cycle coolant-temperature gage (is that recirculated water enters condenser after absorption heat pump heat release again.Heat supply network major network backwater rises to 75 ℃ by absorption heat pump by 55 ℃ of backwater, then enters unit heat exchangers for district heating, and 75 ℃ of backwater are heated to 111.6 ℃, then by peak load calorifier, by 111.6 ℃, rises to 135 ℃ and supplies with hot user.

The feature of above-mentioned these bootstrap systems is all to have improved energy utilization rate, but has also changed the whole therrmodynamic system of steam turbine simultaneously, and makes system more complicated, thereby makes the energy consumption index of on-line monitoring unit more be difficult to realize.

Summary of the invention

The embodiment of the present invention provides a kind of monitoring system and method for Fossil-fired Unit Performance, for solving prior art therrmodynamic system complex structure, thereby makes the energy consumption index of on-line monitoring unit more be difficult to realize.

A kind of monitoring system of Fossil-fired Unit Performance in the embodiment of the present invention, described monitoring system comprises:

Wireless acquisition device, treating apparatus and switching device;

Described wireless acquisition device connects fired power generating unit bootstrap system, for gathering the unit operation parameter of fired power generating unit bootstrap system; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow and be sent to treating apparatus;

Described treating apparatus is set up the performance of obtaining net coal consumption rate and described fired power generating unit in described fired power generating unit after the set of eigenvectors between energy consumption characteristics and unit operation parameter;

Described switching device connects described treating apparatus, for carrying out switching according to the performance of the described fired power generating unit of described treating apparatus acquisition.

The monitoring system of above-mentioned Fossil-fired Unit Performance, wherein, described wireless acquisition device also comprises:

Transmitter, for gathering described unit operation parameter and being sent to terminal groove;

Terminal groove, connects transmitter and measuring resistance, for changing described wireless acquisition device at the mode of operation signal of gatherer process;

Measuring resistance, for converting the current signal of described unit operation parameter to voltage signal;

Voltage measurement parts, are connected with described measuring resistance, for measuring the magnitude of voltage of described voltage signal;

Central processing unit, is connected with described voltage measurement parts, for the unit operation parameter of described voltage signal is added to markers, and dissimilar unit operation parameter is stored respectively;

Wireless transmission component, is connected with described central processing unit, for the signal of central processing unit output is transferred to described treating apparatus.

The monitoring system of above-mentioned Fossil-fired Unit Performance, wherein, described central processing unit also, for the magnitude of voltage of the unit operation parameter of described voltage measurement parts measurement is processed according to different ranges, is finally exported the voltage data corresponding with described unit operation parameter.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and wherein, described method comprises:

By wireless acquisition device, gather the unit operation parameter of fired power generating unit bootstrap system; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow;

Set up the set of eigenvectors between energy consumption characteristics and unit operation parameter in described fired power generating unit; Set of eigenvectors between described energy consumption characteristics and unit operation parameter comprises: the power equation of the topological structure of Steam Turbine vector, described fired power generating unit and caloric receptivity equation in the proper vector between the hot physical property state parameter of working medium, described fired power generating unit;

By the set of eigenvectors between described energy consumption characteristics and unit operation parameter, obtain net coal consumption rate, and according to described net coal consumption rate, monitor the performance of described fired power generating unit;

By switching device, according to the performance of described fired power generating unit, carry out switching.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, described method also comprises: according to formula (1):

$b_{\mathrm{sn}}=\frac{122.835}{{\mathrm{\η}}_b{\mathrm{\η}}_i{\mathrm{\η}}_m{\mathrm{\η}}_g{\mathrm{\η}}_p(1-\mathrm{\ξ})}---\left(1\right)$

Obtain described net coal consumption rate b _sn, wherein: η _bfor boiler efficiency, η _ifor thermal efficiency of cycle, η _mfor mechanical efficiency, η _gfor efficiency of generator, η _pfor pipeline efficiency, ξ is station service power consumption rate.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, described method comprises: according to formula (2):

${\mathrm{\η}}_i=\frac{N}{Q}---\left(2\right)$

Obtain thermal efficiency η _i, the acting amount that wherein N is fired power generating unit, the amount of heat absorption that Q is fired power generating unit.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, described method also comprises: according to formula (3):

$h(\mathrm{\π},\mathrm{\τ})=\mathrm{RT\τ}(\underset{i=1}{\overset{9}{\mathrm{\Σ}}}{n}_i^0{J}_i^0{\mathrm{\τ}}^{J_i^0-1}+\underset{i=1}{\overset{43}{\mathrm{\Σ}}}{n}_i{\mathrm{\π}}^{I_i}{J}_i{(\mathrm{\τ}-0.5)}^{J_i-1})---\left(3\right)$

Set up the proper vector between the hot physical property state parameter of described working medium, wherein, h is vapours enthalpy, reduced pressure π=p/p ^*, reduced temperature τ=T ^*/ T, p ^*, T ^*be respectively Characteristic pressures and characteristic temperature, n _i, I _iand J _ibe constant coefficient, R is gas law constant.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, according to power equation (4):

$N=h_0+\mathrm{\σ}-h_c-{\left[{\mathrm{\α}}_i\right]}^T\left[{\tilde{h}}_i^{\mathrm{\σ}}\right]-{\left[{\mathrm{\α}}_{\mathrm{fi}}\right]}^T\left[{\tilde{h}}_{\mathrm{fi}}^{\mathrm{\σ}}\right]---\left(4\right)$

Obtain the acting amount N of fired power generating unit;

Wherein: if drawn gas, from high pressure cylinder, leave: ${\tilde{h}}_i^{\mathrm{\σ}}=h_i+\mathrm{\σ}-h_c,{\tilde{h}}_{\mathrm{fi}}^{\mathrm{\σ}}=h_{\mathrm{fi}}+\mathrm{\σ}-h_c;$

If drawn gas, therefrom low pressure (LP) cylinder leaves: ${\tilde{h}}_i^{\mathrm{\σ}}=h_i-h_c,{\tilde{h}}_{\mathrm{fi}}^{\mathrm{\σ}}=h_{\mathrm{fi}}-h_c;$

H ₀for main steam enthalpy, h _cfor low pressure (LP) cylinder exhaust enthalpy, σ is the enthalpy liter in reheater, [a _i] be regenerative steam coefficient vector,

for the enthalpy drop of drawing gas, [a _fi] be auxiliary steam coefficient vector,

for other Auxiliary Steam-water enthalpy drop, h _ifor the enthalpy that draws gas, h _fifor auxiliary steam enthalpy.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, described method also comprises: according to caloric receptivity equation (5):

$Q=h_0+\mathrm{\σ}-h_{\mathrm{fw}}-{\left[{\mathrm{\α}}_i\right]}_c^T{\left[\mathrm{\σ}\right]}_c-{\left[{\mathrm{\α}}_{\mathrm{fi}}\right]}_d^T{\left[\mathrm{\σ}\right]}_d+{\mathrm{\α}}_{\mathrm{rs}}(h_r-h_{\mathrm{rs}})+{\mathrm{\α}}_{\mathrm{ss}}(h_0-h_{\mathrm{ss}})+{\left[{\mathrm{\α}}_{\mathrm{bi}}\right]}_m{{[h_{\mathrm{bi}}-h_{\mathrm{fw}}]}_m}^T$

（5）

Obtain amount of heat absorption Q; Wherein: h ₀for main steam enthalpy, σ is the enthalpy liter in reheater, h _fwfor feedwater enthalpy, [a _i] be regenerative steam coefficient vector, [a _fi] be auxiliary steam coefficient vector, α _ssfor than overheated spray water flux, h _ssfor overheated desuperheating water enthalpy, α _rsfor than hot spray water flux again, h _rsfor reheater desuperheating water enthalpy, h _rfor reheated steam enthalpy, h ₀for main steam enthalpy, summing target c is high pressure cylinder primary heater progression, and d is from main inlet throttle-stop valve to leaving the number of the auxiliary steam flow of system hot cold section again, α _bifor the medium-loss of boiler side, total m kind, its enthalpy is respectively h _bi;

Described medium-loss comprises: continuous blowdown amount, average or periodic blow down amount, average boiler soot-blowing amount.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, described method also comprises:

According to Steam Turbine topological structure vector in described fired power generating unit, obtain regenerative steam coefficient vector; Described regenerative steam coefficient vector is the described fired power generating unit non-adjusting amounts of drawing gas of bleeding at different levels.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, by Steam Turbine topological structure vector substitution formula (6) in described fired power generating unit:

[a _i]＝f(p _i,T _i)＝([τ _i]-[A _f].[α _fi]-[A _τ].[α _τi]-[Δq])[A] ^-1 （6）

Obtain described regenerative steam coefficient vector;

Described Steam Turbine topological structure vector is formula (7):

[A].[α _i]+[A _f].[α _fi]+[A _τ].[α _τi]+[Δq]＝[τ _i] （7）

Wherein: [A], [A _f] and [A _τ] be respectively the structure vector relevant with auxiliary current cellular construction with backheat unit in described fired power generating unit, auxiliary steam unit, UTILIZATION OF VESIDUAL HEAT IN unit, [a _i], [a _fi] and [a _{τ i}] be respectively regenerative steam coefficient vector, auxiliary steam coefficient vector and by the coefficient of flow matrix of main feed line or condensate line turnover bootstrap system, [Δ q] provides separately heat vector, [τ for supplemental heat vector or waste heat _i] be feed-water enthalpy rise vector.

The monitoring system of the Fossil-fired Unit Performance that the embodiment of the present invention provides and method, by increasing wireless acquisition device and adopt on hardware configuration, set up the set of eigenvectors between energy consumption characteristics and unit operation parameter in described fired power generating unit in monitoring method, can be for dissimilar unit, the exhaust heat utilization effect of dissimilar unit is done to energy consumption assessment and the calculating of the main heat economy performance of actual operating mode index, actual operating mode unit performance of main equipment index is calculated, actual operating mode UTILIZATION OF VESIDUAL HEAT IN power consumption analysis, thereby determine the effective utilization rate of waste heat of unit under different operating modes, reasonably arrange operation to drop into and excision.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, does not form limitation of the invention.In the accompanying drawings:

Fig. 1 is the schematic diagram that in prior art, a kind of degree of depth recovery boiler smoke exhaust heat improves the system of unit cycle efficieny;

Fig. 2 is the schematic diagram of a kind of bootstrap system in prior art;

Fig. 3 is the structural representation of a kind of monitoring system of Fossil-fired Unit Performance in the embodiment of the present invention;

Fig. 4 is the structural representation of wireless acquisition device in the embodiment of the present invention;

Fig. 5 is the process flow diagram of a kind of monitoring method of Fossil-fired Unit Performance in the embodiment of the present invention.

Embodiment

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail.At this, schematic description and description of the present invention is used for explaining the present invention, but not as a limitation of the invention.

The embodiment of the present invention provides a kind of monitoring system of Fossil-fired Unit Performance, and as shown in Figure 3, described monitoring system comprises:

Wireless acquisition device 301, treating apparatus 302 and switching device 303;

Described wireless acquisition device 301 connects fired power generating unit bootstrap system, for gathering the unit operation parameter of fired power generating unit bootstrap system; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow and be sent to treating apparatus; Unit operation parameter will be as subsequent analysis Fossil-fired Unit Performance, especially the foundation of the performance of fired power generating unit bootstrap system.

The performance of described fired power generating unit is processed and obtained to 302 pairs of described unit operation parameters of described treating apparatus;

Described switching device 303 connects described treating apparatus 302, for setting up the performance of obtaining net coal consumption rate and described fired power generating unit after the set of eigenvectors between described fired power generating unit energy consumption characteristics and unit operation parameter.

At this, due in prior art in fired power generating unit bootstrap system general employing of the mode of image data manually read on the spot or build a large amount of data lines and interconnecting module gathers, the former mode is because the environment of process of the test Zhong Biaoji installation site is more severe, therefore, the mode of artificial reading is on the spot relatively dangerous, be unfavorable for the collection of data, storage and real-time online measuring, although the latter's mode has reduced manual work amount and reading is relatively accurate, but be conventionally applied in more complicated site test, and because needs are arranged a large amount of cables and link block, increased the hardware cost of this system.The monitoring system of a kind of Fossil-fired Unit Performance that therefore embodiment of the present invention provides, by adopting wireless acquisition device to carry out in real time data and gathering accurately, can be for dissimilar unit, the exhaust heat utilization effect of dissimilar unit is done to energy consumption assessment and the main heat economy performance of actual operating mode index are calculated, actual operating mode unit performance of main equipment index is calculated, actual operating mode UTILIZATION OF VESIDUAL HEAT IN power consumption analysis, thereby determine the effective utilization rate of waste heat of unit under different operating modes, reasonably arrange operation to drop into and excision.

In the present invention's one preferred embodiment, provide the monitoring system of Fossil-fired Unit Performance, as shown in Figure 4, described wireless acquisition device also comprises:

Transmitter 401, for gathering described unit operation parameter and being sent to terminal groove 402; Preferably, transmitter can be pressure unit.

Terminal groove 402, connects transmitter 401 and measuring resistance 403, for changing described wireless acquisition device at the mode of operation signal of gatherer process; Preferably, terminal groove is such as can be four-hole terminal groove (1,2,3,4), and the different short circuit modes by terminal groove make wireless acquisition device of the present invention can gather the signal of multiple-working mode.

Measuring resistance 403, for converting the current signal of described unit operation parameter to voltage signal; Concrete, because the unit operation parameter collecting is current signal, for the ease of transmission and the processing of follow-up signal, can first current signal be converted herein to voltage signal and then carry out the measurement of magnitude of voltage being transferred to voltage measurement parts.Preferably, measuring resistance, such as the measuring resistance that can be 250 ohm, is conveniently changed signal.

Voltage measurement parts 404, are connected with described measuring resistance 403, for measuring the magnitude of voltage of described voltage signal; In specific implementation process, voltage measurement parts such as can be A D converter.

Central processing unit 405, is connected with described voltage measurement parts, for the unit operation parameter of described voltage signal is added to markers, and dissimilar unit operation parameter is stored respectively; Because unit operation parameter has multiple different classification, need to carry out its corresponding computing, therefore store respectively follow-up convenient extraction.

Wireless transmission component 406, is connected with described central processing unit, for the signal of central processing unit output is transferred to described treating apparatus.Adopt wireless transmission component to communicate by letter with central processing unit, can save human and material resources, simplify hardware facility of the present invention.

The monitoring system of the Fossil-fired Unit Performance that the embodiment of the present invention provides, preferably, described central processing unit 405 also, for the magnitude of voltage of the unit operation parameter of described voltage measurement parts measurement is processed according to different ranges, is finally exported the voltage data corresponding with described unit operation parameter.Because the range of pressure unit is different, mainly contain 24MPa, 5.5MPa, 1MPa, 200kPa, 160kPa etc., therefore need central processing unit to screen respectively according to different ranges, and obtain correct pressure signal.

Preferably, the monitoring system of the Fossil-fired Unit Performance that the embodiment of the present invention provides, wherein wireless acquisition device also comprises outer power supply source 407, is connected, for providing stable power supply to described wireless acquisition device with described terminal groove 402 and described measuring resistance 403.When concrete enforcement, outer power supply source is such as the dry cell that can be 2 joint 9V.So, just, form a loop that comprises pressure unit.

The monitoring system of the Fossil-fired Unit Performance that the embodiment of the present invention provides, wherein wireless acquisition device also comprises working power 408, is connected, for power supply input is provided with described central processing unit 405.Working power can realize by the dry cell of 2 joint 4V.

Preferably, wireless acquisition device also comprises: display screen 409, is connected with described central processing unit 405, for the Presentation Function of human-computer interaction interface is provided.

Preferably, wireless acquisition device also comprises: button groups 410, be connected with described central processing unit 405, and the input function of human-computer interaction interface is provided.

In another preferred embodiment, wireless acquisition device also comprises clock chip 411, is connected, for providing the standard time to wireless acquisition device with described central processing unit 405.

In the concrete implementation process of the wireless acquisition device that provides in the embodiment of the present invention, the central processing unit in wireless acquisition device can adopt MSP430F247 chip.

The wireless acquisition device that the embodiment of the present invention provides is applied in the monitoring system of Fossil-fired Unit Performance, and the numerical value that gauge outfit numerical value and wireless acquisition device receive compares, numerical difference between ten thousand/in, there is measurement performance more accurately.Application result shows: the wireless acquisition device that the embodiment of the present invention provides has stronger applicability and stability.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and as shown in Figure 5, described method comprises:

Step 501, gathers the unit operation parameter of fired power generating unit bootstrap system by wireless acquisition device; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow; Unit operation parameter will be as subsequent analysis Fossil-fired Unit Performance, especially the foundation of the performance of fired power generating unit bootstrap system.

Step 502, sets up the set of eigenvectors between energy consumption characteristics and unit operation parameter in described fired power generating unit; Set of eigenvectors between described energy consumption characteristics and unit operation parameter comprises: the power equation of the topological structure of Steam Turbine vector, described fired power generating unit and caloric receptivity equation in the proper vector between the hot physical property state parameter of working medium, described fired power generating unit;

The energy consumption characteristics of unit determines by topological structure, service condition and the method for operation of therrmodynamic system, and above condition can be described as the boundary condition of unit operation.Given when above-mentioned condition, the state parameter at each position of therrmodynamic system (as pressure, temperature, flow etc.) is also just determined, the energy consumption characteristics of corresponding unit is also determined.Therefore, the therrmodynamic system of unit state at a time can be described as a certain definite state point in n dimension state space Ω.

Step 503, obtains net coal consumption rate by the set of eigenvectors between described energy consumption characteristics and unit operation parameter, monitors the performance of described fired power generating unit according to described net coal consumption rate;

Step 504, carries out switching by switching device according to the performance of described fired power generating unit.

The monitoring method of the Fossil-fired Unit Performance that the embodiment of the present invention provides, by wireless acquisition device, data carried out in real time and gather accurately, can be for dissimilar unit, the exhaust heat utilization effect of dissimilar unit is done to energy consumption assessment and the main heat economy performance of actual operating mode index are calculated, actual operating mode unit performance of main equipment index is calculated, actual operating mode UTILIZATION OF VESIDUAL HEAT IN power consumption analysis, thereby determine the effective utilization rate of waste heat of unit under different operating modes, reasonably arrange operation to drop into and excision.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and preferably, described method also comprises: according to formula (1):

$b_{\mathrm{sn}}=\frac{122.835}{{\mathrm{\η}}_b{\mathrm{\η}}_i{\mathrm{\η}}_m{\mathrm{\η}}_g{\mathrm{\η}}_p(1-\mathrm{\ξ})}---\left(1\right)$

Obtain described net coal consumption rate b _sn, wherein: η _bfor boiler efficiency, η _ifor thermal efficiency of cycle, η _mfor mechanical efficiency, η _gfor efficiency of generator, η _pfor pipeline efficiency, ξ is station service power consumption rate.Concrete, net coal consumption rate b _snthe most basic energy consumption characteristics index of fired power generating unit, by the net coal consumption rate b calculating _sn, just can reasonably arrange operation to drop into and excision, realize object of the present invention.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and preferably, described method comprises: according to formula (2):

${\mathrm{\η}}_i=\frac{N}{Q}---\left(2\right)$

Obtain thermal efficiency η _i, the thermal efficiency is the ratio of system acting amount and system absorption heat, the acting amount that wherein N is fired power generating unit, the amount of heat absorption that Q is fired power generating unit.The thermal efficiency is brought in formula (1), asked for the net coal consumption rate b under current working _sn.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and preferably, described method also comprises: according to formula (3):

$h(\mathrm{\π},\mathrm{\τ})=\mathrm{RT\τ}(\underset{i=1}{\overset{9}{\mathrm{\Σ}}}{n}_i^0{J}_i^0{\mathrm{\τ}}^{J_i^0-1}+\underset{i=1}{\overset{43}{\mathrm{\Σ}}}{n}_i{\mathrm{\π}}^{I_i}{J}_i{(\mathrm{\τ}-0.5)}^{J_i-1})---\left(3\right)$

Set up the proper vector between the hot physical property state parameter of described working medium, wherein, h is vapours enthalpy, reduced pressure π=p/p ^*, reduced temperature τ=T ^*/ T, p ^*, T ^*be respectively Characteristic pressures and characteristic temperature, n _i, I _iand J _ibe constant coefficient, R is gas law constant.Preferably, the proper vector between the hot physical property state parameter of working medium provides the algorithm model of asking for the various enthalpies in fired power generating unit.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, preferably, according to power equation (4):

$N=h_0+\mathrm{\σ}-h_c-{\left[{\mathrm{\α}}_i\right]}^T\left[{\tilde{h}}_i^{\mathrm{\σ}}\right]-{\left[{\mathrm{\α}}_{\mathrm{fi}}\right]}^T\left[{\tilde{h}}_{\mathrm{fi}}^{\mathrm{\σ}}\right]---\left(4\right)$

Obtain the acting amount N of fired power generating unit;

Wherein: if drawn gas, from high pressure cylinder, leave: ${\tilde{h}}_i^{\mathrm{\σ}}=h_i+\mathrm{\σ}-h_c,{\tilde{h}}_{\mathrm{fi}}^{\mathrm{\σ}}=h_{\mathrm{fi}}+\mathrm{\σ}-h_c;$

If drawn gas, therefrom low pressure (LP) cylinder leaves: ${\tilde{h}}_i^{\mathrm{\σ}}=h_i-h_c,{\tilde{h}}_{\mathrm{fi}}^{\mathrm{\σ}}=h_{\mathrm{fi}}-h_c;$

H ₀for main steam enthalpy, h _cfor low pressure (LP) cylinder exhaust enthalpy, σ is the enthalpy liter in reheater, [a _i] be regenerative steam coefficient vector,

for the enthalpy drop of drawing gas, [a _fi] be auxiliary steam coefficient vector, for other Auxiliary Steam-water enthalpy drop, h _ifor the enthalpy that draws gas, h _fifor auxiliary steam enthalpy.Preferably, enthalpy can be asked for by the proper vector between the hot physical property state parameter of working medium.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and preferably, described method also comprises: according to caloric receptivity equation (5):

$Q=h_0+\mathrm{\σ}-h_{\mathrm{fw}}-{\left[{\mathrm{\α}}_i\right]}_c^T{\left[\mathrm{\σ}\right]}_c-{\left[{\mathrm{\α}}_{\mathrm{fi}}\right]}_d^T{\left[\mathrm{\σ}\right]}_d+{\mathrm{\α}}_{\mathrm{rs}}(h_r-h_{\mathrm{rs}})+{\mathrm{\α}}_{\mathrm{ss}}(h_0-h_{\mathrm{ss}})+{\left[{\mathrm{\α}}_{\mathrm{bi}}\right]}_m{{[h_{\mathrm{bi}}-h_{\mathrm{fw}}]}_m}^T$

（5）

Obtain amount of heat absorption Q; Wherein: h ₀for main steam enthalpy, σ is the enthalpy liter in reheater, h _fwfor feedwater enthalpy, [a _i] be regenerative steam coefficient vector, [a _fi] be auxiliary steam coefficient vector, α _ssfor than overheated spray water flux, h _ssfor overheated desuperheating water enthalpy, α _rsfor than hot spray water flux again, h _rsfor reheater desuperheating water enthalpy, h _rfor reheated steam enthalpy, h ₀for main steam enthalpy, summing target c is high pressure cylinder primary heater progression, and d is from main inlet throttle-stop valve to leaving the number of the auxiliary steam flow of system hot cold section again, α _bifor the medium-loss of boiler side, total m kind, its enthalpy is respectively h _bi;

Described medium-loss comprises: continuous blowdown amount, average or periodic blow down amount, average boiler soot-blowing amount.

Preferably, in the embodiment of the present invention, by formula (4), ask for the acting amount of fired power generating unit and the absorption heat that obtains fired power generating unit by formula (5), bring in formula (2), formula (2) is deformed into:

${\mathrm{\η}}_i=\frac{N}{Q}=\frac{h_0+\mathrm{\σ}-h_c-{\left[{\mathrm{\α}}_i\right]}^T\left[{\tilde{h}}_i^{\mathrm{\σ}}\right]-{\left[{\mathrm{\α}}_{\mathrm{fi}}\right]}^T\left[{\tilde{h}}_{\mathrm{fi}}^{\mathrm{\σ}}\right]}{h_0+\mathrm{\σ}-h_{\mathrm{fw}}-{\left[{\mathrm{\α}}_i\right]}_c^T{\left[\mathrm{\σ}\right]}_c-{\left[{\mathrm{\α}}_{\mathrm{fi}}\right]}_d^T{\left[\mathrm{\σ}\right]}_d+{\mathrm{\α}}_{\mathrm{rs}}(h_r-h_{\mathrm{rs}})+{\mathrm{\α}}_{\mathrm{ss}}(h_0-h_{\mathrm{ss}})+{\left[{\mathrm{\α}}_{\mathrm{bi}}\right]}_m{{[h_{\mathrm{bi}}-h_{\mathrm{fw}}]}_m}^T}$

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and preferably, described method also comprises:

According to Steam Turbine topological structure vector in described fired power generating unit, obtain regenerative steam coefficient vector; Described regenerative steam coefficient vector is the described fired power generating unit non-adjusting amounts of drawing gas of bleeding at different levels.Concrete, in fired power generating unit, Steam Turbine has multistage bleeding.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, preferably, and by Steam Turbine topological structure vector substitution formula (6) in described fired power generating unit:

[a _i]＝f(p _i,T _i)＝([τ _i]-[A _f].[α _fi]-[A _τ].[α _τi]-[Δq])[A] ^-1 （6）

Obtain described regenerative steam coefficient vector;

Described Steam Turbine topological structure vector is formula (7):

[A].[α _i]+[A _f].[α _fi]+[A _τ].[α _τi]+[Δq]＝[τ _i] （7）

Wherein: [A], [A _f] and [A _τ] be respectively the structure vector relevant with auxiliary current cellular construction with backheat unit in described fired power generating unit, auxiliary steam unit, UTILIZATION OF VESIDUAL HEAT IN unit, [a _i], [a _fi] and [a _{τ i}] be respectively regenerative steam coefficient vector, auxiliary steam coefficient vector and by the coefficient of flow matrix of main feed line or condensate line turnover bootstrap system, [Δ q] provides separately heat vector, [τ for supplemental heat vector or waste heat _i] be feed-water enthalpy rise vector.By formula (7), formula (6) is carried out to iteration, just can calculate regenerative steam coefficient vector [a _i], i.e. non-adjusting amounts of drawing gas at different levels.

The monitoring system of the Fossil-fired Unit Performance that the embodiment of the present invention provides and method, by setting up the set of eigenvectors of therrmodynamic system, make the desired value of system have the vector set of corresponding relation between the system status parameters of unique solution, characterizes the thermodynamic state of unit.Thereby calculate the non-adjusting amount of drawing gas, and then obtain the heat-economy figure of unit, it is the performance of described fired power generating unit, make to analyze and be based upon on the topological structure and thermodynamic state parameter of system, for the partial Quantitative Analysis of therrmodynamic system, established unified unification analysis means, made it depart from each step in analytic process and all emphasize thermally equilibrated thought.Set of eigenvectors structure is comparatively easy, and highly versatile, is convenient to analyze the impact of multiple UTILIZATION OF VESIDUAL HEAT IN mode on fired power generating unit therrmodynamic system.

Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (11)

1. a monitoring system for Fossil-fired Unit Performance, is characterized in that, described monitoring system comprises:

Wireless acquisition device, treating apparatus and switching device;

Described wireless acquisition device connects fired power generating unit bootstrap system, for gathering the unit operation parameter of fired power generating unit bootstrap system; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow and be sent to treating apparatus;

Described treating apparatus is set up the performance of obtaining net coal consumption rate and described fired power generating unit in described fired power generating unit after the set of eigenvectors between energy consumption characteristics and unit operation parameter;

Described switching device connects described treating apparatus, for carrying out switching according to the performance of the described fired power generating unit of described treating apparatus acquisition.

2. the monitoring system of Fossil-fired Unit Performance according to claim 1, is characterized in that, described wireless acquisition device also comprises:

Transmitter, for gathering described unit operation parameter and being sent to terminal groove;

Terminal groove, connects transmitter and measuring resistance, for changing described wireless acquisition device at the mode of operation signal of gatherer process;

Measuring resistance, for converting the current signal of described unit operation parameter to voltage signal;

Voltage measurement parts, are connected with described measuring resistance, for measuring the magnitude of voltage of described voltage signal;

Central processing unit, is connected with described voltage measurement parts, for the unit operation parameter of described voltage signal is added to markers, and dissimilar unit operation parameter is stored respectively;

Wireless transmission component, is connected with described central processing unit, for the signal of central processing unit output is transferred to described treating apparatus.

3. the monitoring system of Fossil-fired Unit Performance according to claim 1, it is characterized in that, described central processing unit also, for the magnitude of voltage of the unit operation parameter of described voltage measurement parts measurement is processed according to different ranges, is finally exported the voltage data corresponding with described unit operation parameter.

4. a monitoring method for Fossil-fired Unit Performance, is characterized in that, described method comprises:

By wireless acquisition device, gather the unit operation parameter of fired power generating unit bootstrap system; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow;

Set up the set of eigenvectors between energy consumption characteristics and unit operation parameter in described fired power generating unit; Set of eigenvectors between described energy consumption characteristics and unit operation parameter comprises: the power equation of the topological structure of Steam Turbine vector, described fired power generating unit and caloric receptivity equation in the proper vector between the hot physical property state parameter of working medium, described fired power generating unit;

By the set of eigenvectors between described energy consumption characteristics and unit operation parameter, obtain net coal consumption rate, and according to described net coal consumption rate, monitor the performance of described fired power generating unit;

By switching device, according to the performance of described fired power generating unit, carry out switching.

5. the monitoring method of a kind of Fossil-fired Unit Performance according to claim 4, is characterized in that, described method also comprises: according to formula (1):

$b_{\mathrm{sn}}=\frac{122.835}{{\mathrm{\η}}_b{\mathrm{\η}}_i{\mathrm{\η}}_m{\mathrm{\η}}_g{\mathrm{\η}}_p(1-\mathrm{\ξ})}---\left(1\right)$

Obtain described net coal consumption rate b _sn, wherein: η _bfor boiler efficiency, η _ifor thermal efficiency of cycle, η _mfor mechanical efficiency, η _gfor efficiency of generator, η _pfor pipeline efficiency, ξ is station service power consumption rate.

6. the monitoring method of a kind of Fossil-fired Unit Performance according to claim 5, is characterized in that, described method comprises: according to formula (2):

${\mathrm{\η}}_i=\frac{N}{Q}---\left(2\right)$

Obtain thermal efficiency η _i, the acting amount that wherein N is fired power generating unit, the amount of heat absorption that Q is fired power generating unit.

7. the monitoring method of a kind of Fossil-fired Unit Performance according to claim 4, is characterized in that, described method also comprises: according to formula (3):

$h(\mathrm{\π},\mathrm{\τ})=\mathrm{RT\τ}(\underset{i=1}{\overset{9}{\mathrm{\Σ}}}{n}_i^0{J}_i^0{\mathrm{\τ}}^{J_i^0-1}+\underset{i=1}{\overset{43}{\mathrm{\Σ}}}{n}_i{\mathrm{\π}}^{I_i}{J}_i{(\mathrm{\τ}-0.5)}^{J_i-1})---\left(3\right)$

Set up the proper vector between the hot physical property state parameter of described working medium, wherein, h is vapours enthalpy, reduced pressure π=p/p ^*, reduced temperature τ=T ^*/ T, p ^*, T ^*be respectively Characteristic pressures and characteristic temperature, n _i, I _iand J _ibe constant coefficient, R is gas law constant.

8. the monitoring method of a kind of Fossil-fired Unit Performance according to claim 6, is characterized in that, according to power equation (4):

$N=h_0+\mathrm{\σ}-h_c-{\left[{\mathrm{\α}}_i\right]}^T\left[{\tilde{h}}_i^{\mathrm{\σ}}\right]-{\left[{\mathrm{\α}}_{\mathrm{fi}}\right]}^T\left[{\tilde{h}}_{\mathrm{fi}}^{\mathrm{\σ}}\right]---\left(4\right)$

Obtain the acting amount N of fired power generating unit;

Wherein: if drawn gas, from high pressure cylinder, leave: ${\tilde{h}}_i^{\mathrm{\σ}}=h_i+\mathrm{\σ}-h_c,{\tilde{h}}_{\mathrm{fi}}^{\mathrm{\σ}}=h_{\mathrm{fi}}+\mathrm{\σ}-h_c;$

If drawn gas, therefrom low pressure (LP) cylinder leaves: ${\tilde{h}}_i^{\mathrm{\σ}}=h_i-h_c,{\tilde{h}}_{\mathrm{fi}}^{\mathrm{\σ}}=h_{\mathrm{fi}}-h_c;$

H ₀for main steam enthalpy, h _cfor low pressure (LP) cylinder exhaust enthalpy, σ is the enthalpy liter in reheater, [a _i] be regenerative steam coefficient vector,

for the enthalpy drop of drawing gas, [a _fi] be auxiliary steam coefficient vector,

for other Auxiliary Steam-water enthalpy drop, h _ifor the enthalpy that draws gas, h _fifor auxiliary steam enthalpy.

9. the monitoring method of a kind of Fossil-fired Unit Performance according to claim 6, is characterized in that, described method also comprises: according to caloric receptivity equation (5):

$Q=h_0+\mathrm{\σ}-h_{\mathrm{fw}}-{\left[{\mathrm{\α}}_i\right]}_c^T{\left[\mathrm{\σ}\right]}_c-{\left[{\mathrm{\α}}_{\mathrm{fi}}\right]}_d^T{\left[\mathrm{\σ}\right]}_d+{\mathrm{\α}}_{\mathrm{rs}}(h_r-h_{\mathrm{rs}})+{\mathrm{\α}}_{\mathrm{ss}}(h_0-h_{\mathrm{ss}})+{\left[{\mathrm{\α}}_{\mathrm{bi}}\right]}_m{{[h_{\mathrm{bi}}-h_{\mathrm{fw}}]}_m}^T$

（5）

Obtain amount of heat absorption Q; Wherein: h ₀for main steam enthalpy, σ is the enthalpy liter in reheater, h _fwfor feedwater enthalpy, [a _i] be regenerative steam coefficient vector, [a _fi] be auxiliary steam coefficient vector, α _ssfor than overheated spray water flux, h _ssfor overheated desuperheating water enthalpy, α _rsfor than hot spray water flux again, h _rsfor reheater desuperheating water enthalpy, h _rfor reheated steam enthalpy, h ₀for main steam enthalpy, summing target c is high pressure cylinder primary heater progression, and d is from main inlet throttle-stop valve to leaving the number of the auxiliary steam flow of system hot cold section again, α _bifor the medium-loss of boiler side, total m kind, its enthalpy is respectively h _bi;

Described medium-loss comprises: continuous blowdown amount, average or periodic blow down amount, average boiler soot-blowing amount.

10. the monitoring method of a kind of Fossil-fired Unit Performance according to claim 9, is characterized in that, described method also comprises:

According to Steam Turbine topological structure vector in described fired power generating unit, obtain regenerative steam coefficient vector; Described regenerative steam coefficient vector is the described fired power generating unit non-adjusting amounts of drawing gas of bleeding at different levels.

The monitoring method of 11. a kind of Fossil-fired Unit Performances according to claim 10, is characterized in that,

By Steam Turbine topological structure vector substitution formula (6) in described fired power generating unit:

[a _i]＝f(p _i,T _i)＝([τ _i]-[A _f].[α _fi]-[A _τ].[α _τi]-[Δq])[A] ^-1 （6）

Obtain described regenerative steam coefficient vector;

Described Steam Turbine topological structure vector is formula (7):

[A].[α _i]+[A _f].[α _fi]+[A _τ].[α _τi]+[Δq]＝[τ _i] （7）

Wherein: [A], [A _f] and [A _τ] be respectively the structure vector relevant with auxiliary current cellular construction with backheat unit in described fired power generating unit, auxiliary steam unit, UTILIZATION OF VESIDUAL HEAT IN unit, [a _i], [a _fi] and [a _{τ i}] be respectively regenerative steam coefficient vector, auxiliary steam coefficient vector and by the coefficient of flow matrix of main feed line or condensate line turnover bootstrap system, [Δ q] provides separately heat vector, [τ for supplemental heat vector or waste heat _i] be feed-water enthalpy rise vector.

Images