CN107121941B - Simulation method and device for stable heating of combined operation of micro gas turbine and heat supply network - Google Patents
Simulation method and device for stable heating of combined operation of micro gas turbine and heat supply network Download PDFInfo
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- CN107121941B CN107121941B CN201710501404.2A CN201710501404A CN107121941B CN 107121941 B CN107121941 B CN 107121941B CN 201710501404 A CN201710501404 A CN 201710501404A CN 107121941 B CN107121941 B CN 107121941B
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Abstract
The invention discloses a simulation method and a device for stable heating of the combined operation of a micro gas turbine and a heat supply network, wherein the method comprises the steps of respectively connecting a control machine and a simulator with an Ethernet, and simulating the operation process of a heat supply network part and a power grid part consisting of the micro gas turbine by using an industrial personal computer in the simulator to obtain a simulation variable of simulated operation; the simulation device used in the simulation method for stably operating and stably heating the micro gas turbine and the heat supply network in a combined mode comprises a control machine connected with the Ethernet and a simulator connected with the Ethernet. The invention can increase the heating stability of the micro gas turbine and heat supply network combined operation system and save energy.
Description
Technical Field
The invention relates to the field of energy Internet, in particular to a simulation method and a simulation device for stable heating of combined operation of a micro gas turbine and a heat supply network.
Background
The micro gas turbine is an energy exchange device and has the characteristics of long service life, high reliability, small pollution, flexible control mode and the like. The micro gas turbine power generation system comprises energy forms such as natural gas, electric energy and heat energy, has high conversion efficiency, and is an optimal mode for providing a clean, reliable, high-quality, multipurpose, small-sized distributed power generation, combined heat and power supply and other multi-energy systems. The micro gas turbine plays an extremely important role in the national economy fields of electric power, power and the like in China in the future. A large amount of research work is done on a micro gas turbine in China, but compared with the foreign countries, the research is still imperfect, wherein the utilization rate of high-temperature flue gas output by the turbine of the micro gas turbine is low, the micro gas turbine is used more extensively, the micro gas turbine has the problems that the utilization rate of the high-temperature flue gas output by the turbine is low and the heat loss is large in the using process, and when the high-temperature flue gas output by the turbine of the micro gas turbine is used for heat exchange heating with water, the heat supply is unstable due to the change of the load of the gas turbine, and the heating effect is influenced. Therefore, when the micro gas turbine is used for heating, the temperature control effect is poor, and the heating stability is low.
Disclosure of Invention
The invention aims to provide a simulation method and a simulation device for stable heating of the combined operation of a micro gas turbine and a heat supply network. The invention can increase the heating stability of the micro gas turbine and heat supply network combined operation system and save energy.
The technical scheme of the invention is as follows: a simulation method for the stable heating of the combined operation of a micro gas turbine and a heat supply network is characterized in that a control machine and a simulator are respectively connected with an Ethernet, an industrial personal computer in the simulator is used for simulating the operation process of a heat supply network part and a power grid part consisting of the micro gas turbine to obtain simulation variables of simulated operation, the control machine obtains a water flow change curve corresponding to an input heat supply network according to the change of the load of a given micro gas turbine to further obtain a circulating water pump power change curve corresponding to the water flow change curve, the output power of the power grid side is controlled through the circulating water pump power change curve to control the power change of a water pump, and further the change of the water flow input into the heat supply network is controlled to ensure that the water temperature is constant, so that the stable heating is.
In the simulation method for stably heating by combining the micro gas turbine and the heat supply network, the controller uses the following formula
Obtaining a water flow rate variation curve corresponding to the load variation of the micro gas turbine, wherein
For varying the temperature of water in the hot water supply tank, mqcq(Tin-Tout) Cm of heat released by high-temperature flue gass(T-Th) For heat dissipated by heating systems, AU (T-T)w) The heat emitted in the air for the hot water supply tank.
In the simulation method for stably heating by the combined operation of the micro gas turbine and the heat supply network, the heat supply network part comprises a heat supply water tank connected with the micro gas turbine through a coil pipe, a water storage barrel, a temperature control valve, a flowmeter, a variable frequency controller and a circulating water pump are arranged in the heat supply water tank, and the heat supply water tank is connected with a heater.
In the simulation method for stably heating the micro gas turbine and the heat supply network in combined operation, the power grid part comprises a power generation device connected with a rotor of the micro gas turbine, and the circulating water pump is connected with the power generation device through a variable frequency controller.
The simulation device used in the simulation method for stably heating by the combined operation of the micro gas turbine and the heat supply network comprises a control machine connected with the Ethernet and a simulation machine connected with the Ethernet.
In the simulation device, the simulator comprises a switch, the switch is respectively connected with an industrial personal computer A and an industrial personal computer B, the industrial personal computer A adopts a large-step simulation power grid part model, and the industrial personal computer B adopts a small-step simulation power grid part formed by a miniature gas turbine.
Compared with the prior art, the invention simulates the operation of the heat supply network part and the power grid part by building the micro gas turbine and heat supply network combined simulation device and using two industrial personal computers based on the xPCtarget technology, and exchanges the operation information in the industrial personal computer A and the industrial personal computer B through the Ethernet and the exchanger to realize real-time simulation so as to obtain simulation variables such as the load of the micro gas turbine for simulating the operation of the system, the temperature and the flow of the output high-temperature flue gas, the water flow output by the circulating water pump, the required electric power and the like; the water temperature change is calculated through simulation variables obtained through simulation, so that the constant heating temperature of the micro gas turbine and heat supply network combined operation system is verified, and the heating stability is improved; the water flow and the required electric power output by the circulating water pump are obtained by simulating the frequency conversion control in the system operation, so that the power consumption of the circulating water pump can be reduced, and the effect of saving energy is achieved.
The high-temperature flue gas output by the micro gas turbine exchanges heat with water in the hot water supply tank through the coil pipe, and the following formula is a mathematical model of heat change of the hot water supply tank:
in the formula: m-mass of water in the hot water supply tank, unit kg; c-specific heat of water, unit J/kg.K; t-temperature of water in the water tank, unit K; m isq-high temperature flue gas flow output by the turbine in kg/s; c. CqSpecific heat of high temperature flue gas, unit J/kg · K; t isin、Tout-input and output temperature of high temperature flue gases, in K; m iss-flow of water to the heating network in kg/s; t ish-return water temperature in K; a-surface area of the tank, unit m2(ii) a U-tank and air heat transfer coefficient in W/m2·K；Tw-outdoor temperature, in K;
for varying the temperature of water in the hot water supply tank, mqcq(Tin-Tout) Cm of heat released by high-temperature flue gass(T-Th) For heat dissipated by heating systems, AU (T-T)w) The heat emitted in the air for the hot water supply tank.
The temperature T of the input and output of the independent variable high-temperature flue gas can be simulated in the industrial personal computer by giving the load change of the micro gas turbineinAnd ToutAnd flow m of high temperature flue gasq(ii) a Variation of water temperature in given type medium hot water supply tank
Is 0; given water temperature T and return water temperature T in medium-heating water tankhAnd outdoor temperature TwIn the formula
mqcq(Tin-Tout) And AU (T-T)w) All the known quantity can be obtained, and the control machine can calculate the middle cm according to the known quantitys(T-Th) M is an unknown quantity msI.e. the flow of water to the heat network; according to the flow m of the obtained water flowing to the heat supply networksCan calculate the requirement of the circulating water pump of the dependent variableInputting electric power, and drawing a power change curve of the circulating water pump according to the obtained data; therefore, when the given load of the micro gas turbine is changed, the flow speed of water in the hot water supply tank is reduced and the output flow and the output power of the circulating water pump are reduced as the temperature and the flow of the flue gas fall off to keep the temperature of the water in the hot water supply tank stable.
As shown in fig. 3, by giving the micro gas turbine load, and dropping the given micro gas turbine load from 65KW to 40KW at 1.5 h; as shown in fig. 4 and 5, as the load of the micro gas turbine falls, the required fuel quantity also falls, so that the temperature of the high-temperature flue gas output by the turbine falls from 860 ℃ to 790 ℃, and the flue gas flow output by the turbine falls from 0.15555kg/s to 0.155 kg/s; as shown in the figures 6 and 7, as the temperature and the flow of the flue gas fall, in order to keep the water temperature in the hot water supply tank stable, the output water flow of the hot water supply tank is reduced from 2kg/s to 1kg/s, and the electric power required by the circulating water pump is reduced from 0.3-0.4 KW to 0.02KW due to the reduction of the water flow, so that the electric energy consumed by the circulating water pump is saved. The load of a given micro gas turbine falls within 1.5h, as shown in figure 8, frequency conversion control is not applied to a circulating water pump, and the water temperature is gradually reduced from 60 ℃ to 45 ℃; as shown in fig. 9, the variable frequency control is applied to the circulating water pump, and the water temperature is kept constant at 60 ℃; by comparing fig. 8 and fig. 9, it can be seen that after the frequency conversion control is applied to reduce the electric power required by the circulating water pump, when the load of the micro gas turbine falls, the water temperature can be kept constant by controlling the change of the water flow through the power change curve of the circulating water pump, so that the frequency conversion control is applied to be beneficial to ensuring the constant temperature of the system, and the stability of heating is improved. The invention adopts the frequency conversion control to adjust the electric power required by the circulating water pump, has the advantages that the circulating water pump can be dynamically controlled through the water flow change input into the heat supply network, and the electric energy required by the circulating water pump can be effectively saved.
In conclusion, the invention can increase the heating stability of the micro gas turbine and heat supply network combined operation system and save energy.
Drawings
FIG. 1 is a schematic diagram of a simulation apparatus;
FIG. 2 is a schematic diagram of a system in which a grid section operates in conjunction with a heat supply network section;
FIG. 3 is a waveform plot of a given load of the micro gas turbine;
FIG. 4 is a waveform of the temperature of the high temperature flue gas output by the micro gas turbine;
FIG. 5 is a waveform diagram of the flow of the high temperature flue gas output from the micro gas turbine;
FIG. 6 is a waveform diagram of the water flow output required by the circulating water pump when the temperature of the water tank is kept constant;
FIG. 7 is a waveform diagram of the electric power required by the circulating water pump while keeping the temperature of the water tank constant;
FIG. 8 is a waveform diagram of the change in water temperature before control is applied;
fig. 9 is a waveform diagram of a change in water temperature after control is applied.
The labels in the figures are: the system comprises 1-Ethernet, 2-control machine, 3-analog machine, 4-exchanger, 5-industrial computer A, 6-industrial computer B, 7-coil pipe, 8-water storage barrel, 9-flowmeter, 10-frequency conversion controller, 11-circulating water pump and 12-heater.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. A simulation method for stable heating of a micro gas turbine and a heat supply network in combined operation is disclosed, as shown in fig. 1 and fig. 2, the method comprises the steps of respectively connecting a control machine and a simulator with an Ethernet, simulating the operation process of a heat supply network part and a power network part formed by the micro gas turbine by using an industrial personal computer in the simulator to obtain simulation variables of simulated operation, obtaining a water flow change curve corresponding to an input heat supply network by the control machine according to the load change of a given micro gas turbine, further obtaining a circulating water pump power change curve corresponding to the water flow change curve, controlling the output power of a power network side through the circulating water pump power change curve, further controlling the water flow change input into the heat supply network, enabling the water temperature to be constant, and further realizing stable heating.
The control machine is obtained by
Obtaining a water flow rate variation curve corresponding to the load variation of the micro gas turbine, wherein
For varying the temperature of water in the hot water supply tank, mqcq(Tin-Tout) Cm of heat released by high-temperature flue gass(T-Th) For heat dissipated by heating systems, AU (T-T)w) Heat dissipated in the air for the hot water supply tank; the heat supply network part comprises a hot water supply tank connected with the micro gas turbine through a coil 7, a water storage barrel 8, a temperature control valve, a flowmeter 9, a variable frequency controller 10 and a circulating water pump 11 are arranged in the hot water supply tank, and the hot water supply tank is connected with a heater 12; the power grid part comprises a power generation device connected with a rotor of the micro gas turbine, and a circulating water pump 11 is connected with the power generation device through a variable frequency controller 10; the simulation device used by the simulation method for stably heating by the combined operation of the micro gas turbine and the heat supply network comprises a control machine 2 connected with an Ethernet 1 and a simulator 3 connected with the Ethernet 1; the simulator 3 comprises a switch 4, the switch 4 is respectively connected with an industrial personal computer A5 and an industrial personal computer B6, the industrial personal computer A adopts a large-step simulation power grid part model, and the industrial personal computer B adopts a small-step simulation power grid part formed by a miniature gas turbine.
The working principle is as follows: a micro gas turbine and heat supply network combined simulation device is built through MATLAB/Simulink, and two industrial personal computers based on xPCtarget technology are used through the following formula
Simulating the system operation, inputting the change of the load of the given micro gas turbine to obtain the change of the temperature and the flow of the high-temperature flue gas output by the micro gas turbine, and giving the change of the water temperature in the hot water supply tank
Is 0; the water temperature T and the return water temperature T in the water supply tank are givenhAnd outdoor temperature TwIn the formula
mqcq(Tin-Tout) And AU (T-T)w) All the known quantity can be obtained, and the control machine can calculate the middle cm according to the known quantitys(T-Th) M is an unknown quantity msI.e. the flow of water to the heat network; according to the flow m of the obtained water flowing to the heat supply networksObtaining the electric power required to be input by the variable quantity circulating water pump, and drawing a power change curve of the circulating water pump according to the obtained data; simulating the following operation process in a simulation device, wherein the micro gas turbine comprises a gas compressor, a combustion chamber, a turbine, a rotor, a rotating speed control system and the like, outside air is compressed into high-temperature high-pressure gas through the gas compressor to continuously provide the high-pressure gas for the combustion chamber, fuel is input into the combustion chamber through a fuel pump, a speed proportional valve and a fuel control valve, then the fuel is mixed and combusted with the high-pressure gas provided by the gas compressor in the combustion chamber to release chemical energy to drive the turbine to rotate for working, part of the energy is converted into electric power through a power generation device to be output, and part of the energy is dissipated in the form of heat energy through; the turbine is connected with the hot water supply tank through the coil 7, the output high-temperature flue gas exchanges heat with water in the hot water supply tank through the coil 7 to enable the water temperature to rise, the temperature control valve is arranged at the outlet of the hot water supply tank and can obtain the output water flow according to the given temperature, and then the variable frequency controller 10 is controlled to adjust the electric power of the circulating water pump 11, so that the flow of the water flowing to the heat supply network is adjusted, and the stability of the temperature in the water tank is guaranteed; the water flowing to the heat supply network enters a heater 12 through a flowmeter 9 and a heat supply pipeline to supply heat for users; the water from the user warmer 12 is circulated back to the hot water supply tank through a return pipe.
Claims (3)
1. The simulation method for stably heating by the combined operation of the micro gas turbine and the heat supply network is characterized by comprising the following steps of: the method comprises connecting the control machine and the simulator with Ethernet respectively, and operating the heat supply network and the power network composed of the miniature gas turbine by using the industrial control computer in the simulatorPerforming simulation to obtain simulation variables of simulation operation; the controller obtains a water flow change curve corresponding to the input heat supply network according to the change of the load of the given micro gas turbine, further obtains a circulating water pump power change curve corresponding to the water flow change curve, controls the output power of the power grid side through the circulating water pump power change curve, controls the power change of the water pump, further controls the change of the water flow input to the heat supply network, enables the water temperature to be constant, and accordingly realizes stable heating; the control machine is obtained by
Obtaining a water flow rate variation curve corresponding to the load variation of the micro gas turbine, wherein
For varying the temperature of water in the hot water supply tank, mqcq(Tin-Tout) Cm of heat released by high-temperature flue gass(T-Th) For heat dissipated by heating systems, AU (T-T)w) Heat dissipated in the air for the hot water supply tank; in the formula: m-mass of water in the hot water supply tank, unit kg; c-specific heat of water, unit J/kg.K; t-temperature of water in the water tank, unit K; m isq-high temperature flue gas flow output by the turbine in kg/s; c. CqSpecific heat of high temperature flue gas, unit J/kg · K; t isin、Tout-input and output temperature of high temperature flue gases, in K; m iss-flow of water to the heating network in kg/s; t ish-return water temperature in K; a-surface area of the tank, unit m2(ii) a U-tank and air heat transfer coefficient in W/m2·K；Tw-outdoor temperature, in K;
for varying the temperature of water in the hot water supply tank, mqcq(Tin-Tout) Cm of heat released by high-temperature flue gass(T-Th) For heat dissipated by heating systems, AU (T-T)w) Heat dissipated in the air for the hot water supply tank; the above-mentionedThe heat supply network part comprises a hot water supply tank connected with a micro gas turbine through a coil pipe (7), a water storage barrel (8), a temperature control valve, a flowmeter (9), a variable frequency controller (10) and a circulating water pump (11) are arranged in the hot water supply tank, and the hot water supply tank is connected with a heater (12); the power grid part comprises a power generation device connected with a rotor of the micro gas turbine, and a circulating water pump (11) is connected with the power generation device through a variable frequency controller (10).
2. The simulation apparatus for use in the simulation method of the stable heating in the combined operation of the micro gas turbine and the heat supply network according to claim 1, wherein: the device comprises a control machine (2) connected with the Ethernet (1) and a simulator (3) connected with the Ethernet (1).
3. The emulation apparatus according to claim 2, wherein: the simulator (3) comprises a switch (4), the switch (4) is connected with an industrial personal computer A (5) and an industrial personal computer B (6) respectively, the industrial personal computer A adopts a large-step simulation heat supply network part model, and the industrial personal computer B adopts a small-step simulation power grid part formed by a miniature gas turbine.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558363A (en) * | 2004-01-15 | 2004-12-29 | 上海理工大学 | Simulation experiment method and device for energy source island |
| CN106527184A (en) * | 2016-12-30 | 2017-03-22 | 贵州大学 | Real-time simulation model and device for power grid and heat supply network combination in energy internet |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202645692U (en) * | 2012-04-26 | 2013-01-02 | 上海美亚金桥能源有限公司 | Gas distribution type energy supply system |
| JP6316929B2 (en) * | 2013-03-15 | 2018-04-25 | ユナイテッド テクノロジーズ コーポレイションＵｎｉｔｅｄ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏｒｐｏｒａｔｉｏｎ | Engine output control based on small air heat model |
| DE102015208739A1 (en) * | 2015-05-12 | 2016-11-17 | Robert Bosch Gmbh | Device for operating a heating system and / or an air conditioning system and / or a device system and method for operating such a device |
| CN106844944A (en) * | 2017-01-17 | 2017-06-13 | 贵州大学 | A kind of integrated energy system real-time simulation apparatus |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558363A (en) * | 2004-01-15 | 2004-12-29 | 上海理工大学 | Simulation experiment method and device for energy source island |
| CN106527184A (en) * | 2016-12-30 | 2017-03-22 | 贵州大学 | Real-time simulation model and device for power grid and heat supply network combination in energy internet |
Non-Patent Citations (1)
| Title |
|---|
| 太阳能地板辐射采暖系统仿真及设计;郭春磊;《中国优秀硕士学位论文全文数据库 工程科技2辑》;20140815;正文第26-29页 * |
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