CN110824355A - Steam extraction heat supply unit simulation system - Google Patents
Steam extraction heat supply unit simulation system Download PDFInfo
- Publication number
- CN110824355A CN110824355A CN201810906329.2A CN201810906329A CN110824355A CN 110824355 A CN110824355 A CN 110824355A CN 201810906329 A CN201810906329 A CN 201810906329A CN 110824355 A CN110824355 A CN 110824355A
- Authority
- CN
- China
- Prior art keywords
- steam
- rheostat
- converters
- direct
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Turbines (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention provides a steam extraction and heat supply unit simulation system, which comprises at least one steam extraction and heat supply unit simulation unit, wherein the steam extraction and heat supply unit simulation unit comprises: the device comprises an adjustable voltage-stabilizing direct-current power supply, a first rheostat, a second rheostat, a plurality of DC/DC converters connected in series, a direct-current motor, a generator, a speed-regulating control unit and a steam extraction regulating unit. The invention adopts a direct current circuit to simulate a steam system, particularly adopts an adjustable voltage-stabilizing direct current power supply to simulate a boiler, adopts a plurality of DC/DC converters connected in series and a direct current motor connected with the DC/DC converters to simulate each cylinder of a steam turbine, and adopts a first rheostat to simulate a high-pressure regulating valve of the steam turbine; and simulating a steam extraction rotary clapboard of the steam turbine by adopting a second rheostat. Therefore, the steam extraction heat supply unit simulation system provided by the invention is suitable for simulating a steam extraction thermoelectric unit, and has the advantages of flexibility in operation, safety, reliability, easiness in implementation and the like.
Description
Technical Field
The invention relates to the technical field of energy power, in particular to a steam extraction and heat supply unit simulation system.
Background
The thermal power generation mainly comprises the steps of generating high-temperature and high-pressure steam through a power station boiler or a nuclear reactor, working after the high-temperature and high-pressure steam enters a steam turbine, and generating power to rotate so as to drive a synchronous generator set to generate power. Conventionally, a steam turbine and a control system thereof, even a boiler and a steam turbine coordinated control technology of a large power station have a rather mature simulation method, and a dynamic simulation device of a power system is formed, so that a power station boiler and a steam turbine system can be accurately simulated by using a direct-current power supply and a direct-current motor.
Although the pure generator set also has a regenerative system, the total amount is not large, and the pure generator set is finally converted into electric energy, so that the model of the steam extraction system can be not considered. The steam extraction heat supply unit is slightly different from a thermal power plant, because the steam extraction heat supply unit simultaneously provides steam with different pressure grades, a steam extraction system is designed for the steam turbine, and the energy of the supplied steam can be compared with the generated energy. In addition, except that the steam extraction working condition output and the pure condensation output of the thermoelectric unit have obvious difference, the fluctuation of the steam extraction amount can directly influence the fluctuation of electric power; also the power fluctuations can significantly influence the extraction pressure.
At present, no dynamic simulation method and device for researching the thermoelectric unit exist, and the dynamic characteristics of the thermoelectric unit in an accident state cannot be accurately researched. And the influence of fluctuation of the steam extraction amount on the stability of the power system is not considered.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a steam extraction and heat supply unit simulation system.
Specifically, the invention provides the following technical scheme:
the invention provides a steam extraction and heat supply unit simulation system, which comprises at least one steam extraction and heat supply unit simulation unit, wherein the steam extraction and heat supply unit simulation unit comprises: the system comprises an adjustable voltage-stabilizing direct-current power supply, a first rheostat, a second rheostat, a plurality of DC/DC converters connected in series, a direct-current motor, a generator, a speed-regulating control unit and a steam extraction regulating unit;
the adjustable voltage-stabilizing direct-current power supply is connected with a first end of the first rheostat, and a second end of the first rheostat is connected with the plurality of DC/DC converters which are connected in series; the control end of the first rheostat is connected with the speed regulation control unit; the first rheostat is an equivalent rheostat of a regulating valve;
the direct current motor is connected with two DC/DC converters which are connected in series, fixed excitation is adopted by the direct current motor, and the direct current motor is coaxially connected with the generator; the second variable resistor is connected to the negative electrode of the adjustable voltage-stabilizing direct-current power supply from the middle of the two DC/DC converters connected in series, and the second variable resistor is an equivalent variable resistor of the steam extraction valve;
the adjustable voltage-stabilizing direct-current power supply provides stable direct-current voltage to be output to the plurality of DC/DC converters connected in series, maintains the voltage stability of the direct-current loop, and is used for equivalent steam main pipe pressure to simulate a boiler system;
the first rheostat is arranged between the adjustable voltage-stabilizing direct-current power supply and the plurality of DC/DC converters connected in series and used for simulating a high-voltage adjusting valve of the steam turbine and adjusting the current of a direct-current loop;
the speed regulation control unit is connected with the control end of the first rheostat and used for changing the resistance value of the first rheostat according to the rotating speed of the direct-current motor and the output power of the generator, so that the first rheostat simulates a high-voltage adjusting valve of a steam turbine and adjusts the current of a direct-current loop;
the plurality of DC/DC converters connected in series and the DC motors connected with the DC/DC converters are used for simulating cylinders at each stage of the steam turbine and dragging the synchronous generator to generate electricity, if the steam turbine has N-1-stage steam extraction, N DC/DC converters, 1 DC motor and N-1 second rheostat are arranged, and N is more than or equal to 1; each direct current motor corresponds to N adjacent series-connected DC/DC converters, and a second rheostat is connected between the two adjacent series-connected DC/DC converters;
the second rheostat is connected to the negative electrode of the pressure stabilizing source from the middle of the two serially connected DC/DC converters, the control end of the second rheostat is connected with the steam extraction adjusting unit, and the resistance value is changed according to the steam extraction amount under the control of the steam extraction adjusting unit and is used for simulating a steam extraction rotating partition plate of a steam turbine and adjusting the steam extraction amount.
Furthermore, the steam extraction and heat supply unit simulation system comprises m steam extraction and heat supply unit simulation units, wherein m is more than or equal to 2.
Furthermore, the steam extraction and heat supply unit simulation unit comprises three DC/DC converters connected in series, two second varistors and a direct current motor, and is used for simulating high, medium and low pressure cylinders of the steam turbine.
Furthermore, the adjustable voltage-stabilizing direct-current power supply is used for simulating a boiler system to generate steam, the three DC/DC converters are connected in series, and the simulation steam sequentially passes through the high-pressure cylinder, the medium-pressure cylinder and the low-pressure cylinder; the resistance value change of the first rheostat simulates the opening change of a high-pressure adjusting valve of the steam turbine, the steam quantity changes, and the steam turbine does work and changes.
Further, the adjustable voltage-stabilizing direct-current power supply is a controllable rectifier.
Further, the controllable rectifier does work as follows:
P1＝idcvdc
wherein P1 is the power of the controlled rectifier, idcIs a controlled rectifier current, vdcIs a controlled rectifier dc voltage.
Further, the work power of the steam turbine is as follows:
P2＝ΔhQ
wherein, P2 is the work power of the turbine, Δ h is the work enthalpy drop of the turbine, and Q is the steam flow.
Further, the work power of the DC/DC converter is:
P3＝Δh3Q1
P4＝Δh4Q2
P2＝P3+P4
wherein, P3 and P4 are the work power of the DC/DC converter, namely the work power of the high-pressure cylinder and the medium-low pressure cylinder of the steam turbine, P2 is the work power of the steam turbine, delta h3 is the work enthalpy drop of the high-pressure cylinder of the steam turbine, Q1 is the steam flow of the high-pressure cylinder, delta h4 is the work enthalpy drop of the medium-low pressure cylinder of the steam turbine, and Q2 is the steam flow of the medium-low pressure cylinder.
Further, the system further comprises: an excitation unit; the excitation unit is connected with the generator and used for adjusting the output voltage of the generator.
Further, the stable direct current voltage provided by the adjustable voltage-stabilizing direct current power supply is proportional to the pressure of the steam main pipe.
According to the technical scheme, the steam extraction and heat supply unit simulation system provided by the invention adopts a direct-current circuit to simulate a steam system, specifically adopts an adjustable voltage-stabilizing direct-current power supply to simulate a boiler, adopts a plurality of DC/DC converters connected in series and a direct-current motor connected with the DC/DC converters to simulate each cylinder of a steam turbine, and adopts a first rheostat to simulate a high-pressure adjusting valve of the steam turbine; and simulating a steam extraction rotary clapboard of the steam turbine by adopting a second rheostat. The adjustable voltage-stabilizing direct-current power supply is used for providing stable direct-current voltage and equivalent steam main pipe pressure, the adjustable voltage-stabilizing direct-current power supply outputs the stable direct-current voltage and provides power supplies of a plurality of series-connected DC/DC converters through a rheostat, the plurality of series-connected DC/DC converters and a direct-current motor connected with the DC/DC converters simulate a steam turbine and drag a synchronous generator to generate electricity; the first rheostat is an equivalent rheostat of a regulating valve, is controlled by the speed regulating control unit, changes the resistance value according to the rotating speed and the output electric power, and simulates a high-pressure regulating valve of the steam turbine. The second rheostat is an equivalent rheostat of a steam extraction valve, the second rheostat is connected to the negative electrode of the adjustable voltage-stabilizing direct-current power supply from the middle of the two serially-connected DC/DC converters, and the second rheostat is controlled by the steam extraction adjusting unit, changes the resistance value according to the steam extraction amount, and is used for simulating the steam extraction of the steam turbine to rotate the partition plate and adjusting the steam extraction amount. Therefore, the steam extraction heat supply unit simulation system provided by the invention is suitable for simulating a steam extraction thermoelectric unit, and has the advantages of flexibility in operation, safety, reliability, easiness in implementation and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a schematic structural diagram of a steam extraction and heating unit simulation system provided in this embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a steam extraction and heat supply unit simulation system, and referring to fig. 1, the system comprises: at least one steam extraction heat supply unit analog unit, steam extraction heat supply unit analog unit includes: the system comprises an adjustable voltage-stabilizing direct-current power supply, a first rheostat, a second rheostat, a plurality of DC/DC converters connected in series, a direct-current motor, a generator, a speed-regulating control unit and a steam extraction regulating unit;
the adjustable voltage-stabilizing direct-current power supply is connected with a first end of the first rheostat, and a second end of the first rheostat is connected with the plurality of DC/DC converters which are connected in series; the control end of the first rheostat is connected with the speed regulation control unit; the first rheostat is an equivalent rheostat of a regulating valve;
the direct current motor is connected with two DC/DC converters which are connected in series, fixed excitation is adopted by the direct current motor, and the direct current motor is coaxially connected with the generator; the second variable resistor is connected to the negative electrode of the adjustable voltage-stabilizing direct-current power supply from the middle of the two DC/DC converters connected in series, and the second variable resistor is an equivalent variable resistor of the steam extraction valve;
the adjustable voltage-stabilizing direct-current power supply provides stable direct-current voltage to be output to the plurality of DC/DC converters connected in series, maintains the voltage stability of the direct-current loop, and is used for equivalent steam main pipe pressure to simulate a boiler system; the stable direct current voltage provided by the adjustable voltage-stabilizing direct current power supply is proportional to the pressure of the steam main pipe.
The first rheostat is arranged between the adjustable voltage-stabilizing direct-current power supply and the plurality of DC/DC converters connected in series and used for simulating a high-voltage adjusting valve of the steam turbine and adjusting the current of a direct-current loop;
the speed regulation control unit is connected with the control end of the first rheostat and used for changing the resistance value of the first rheostat according to the rotating speed of the direct-current motor and the output power of the generator, so that the first rheostat simulates a high-voltage adjusting valve of a steam turbine and adjusts the current of a direct-current loop;
the plurality of DC/DC converters connected in series and the DC motors connected with the DC/DC converters are used for simulating cylinders at each stage of the steam turbine and dragging the synchronous generator to generate electricity, if the steam turbine has N-1-stage steam extraction, N DC/DC converters, 1 DC motor and N-1 second rheostat are arranged, and N is more than or equal to 1; each direct current motor corresponds to N adjacent series-connected DC/DC converters, and a second rheostat is connected between the two adjacent series-connected DC/DC converters;
the second rheostat is connected to the negative electrode of the pressure stabilizing source from the middle of the two serially connected DC/DC converters, the control end of the second rheostat is connected with the steam extraction adjusting unit, and the resistance value is changed according to the steam extraction amount under the control of the steam extraction adjusting unit and is used for simulating a steam extraction rotating partition plate of a steam turbine and adjusting the steam extraction amount.
It can be understood that, in the steam extraction and heat supply unit simulation system provided by this embodiment, a direct current circuit is adopted to simulate a steam system, specifically, an adjustable voltage-stabilizing direct current power supply is adopted to simulate a boiler, a plurality of series-connected DC/DC converters and a direct current motor connected to the DC/DC converters are adopted to simulate each cylinder of a steam turbine, and a first rheostat is adopted to simulate a high-voltage adjusting valve of the steam turbine; and simulating a steam extraction rotary clapboard of the steam turbine by adopting a second rheostat. The adjustable voltage-stabilizing direct-current power supply is used for providing stable direct-current voltage and equivalent steam main pipe pressure, the adjustable voltage-stabilizing direct-current power supply outputs the stable direct-current voltage and provides power supplies of a plurality of series-connected DC/DC converters through a rheostat, the plurality of series-connected DC/DC converters and a direct-current motor connected with the DC/DC converters simulate a steam turbine and drag a synchronous generator to generate electricity; the first rheostat is an equivalent rheostat of a regulating valve, is controlled by the speed regulating control unit, changes the resistance value according to the rotating speed and the output electric power, and simulates a high-pressure regulating valve of the steam turbine. The second rheostat is an equivalent rheostat of a steam extraction valve, the second rheostat is connected to the negative electrode of the adjustable voltage-stabilizing direct-current power supply from the middle of the two serially-connected DC/DC converters, and the second rheostat is controlled by the steam extraction adjusting unit, changes the resistance value according to the steam extraction amount, and is used for simulating the steam extraction of the steam turbine to rotate the partition plate and adjusting the steam extraction amount.
It can be understood that the steam extraction and heat supply unit simulation system provided in this embodiment is actually an equivalent experimental model of a steam turbine, and referring to fig. 1, the steam extraction and heat supply unit simulation system provided in this embodiment includes an adjustable voltage-stabilized DC power supply (which may be implemented by a rectifier), a varistor, a DC/DC converter, a DC motor, and a generator, where the rectifier is connected to the varistor; the rheostat is connected with the DC/DC converter; a plurality of DC/DC converters are connected in series; the dc motor is coaxial with the alternator.
It should be noted that the rectifier converts the ac power into dc power and transmits the dc power to the motor, and maintains the voltage of the dc loop stable. The first rheostat is connected with the DC/DC converter, simulates a high-pressure adjusting valve of a steam turbine and adjusts loop current. The DC/DC converter and the motor simulate each stage of cylinder of the steam turbine, if the steam turbine has N-1 stage steam extraction, N DC/DC converters, 1 direct current motor and N-1 second rheostat are arranged, and N is more than or equal to 1; each direct current motor corresponds to N adjacent series-connected DC/DC converters, a second rheostat is connected between the two adjacent series-connected DC/DC converters, the second rheostat is connected to the negative electrode of the voltage stabilizing source from the middle of the two series-connected DC/DC converters, the control end of the second rheostat is connected with the steam extraction regulating unit, and the resistance value is changed according to the steam extraction amount under the control of the steam extraction regulating unit and is used for simulating a steam extraction rotating partition plate of a steam turbine to regulate the steam extraction amount.
For example, in a preferred embodiment, the steam extraction and heating unit simulation unit comprises three DC/DC converters connected in series, two second varistors and one DC motor, and is used for simulating high, medium and low pressure cylinders of a steam turbine. Furthermore, the adjustable voltage-stabilizing direct-current power supply is used for simulating a boiler system to generate steam, the three DC/DC converters are connected in series, and the simulation steam sequentially passes through the high-pressure cylinder, the medium-pressure cylinder and the low-pressure cylinder; the resistance value change of the first rheostat simulates the opening change of a high-pressure adjusting valve of the steam turbine, the steam quantity changes, and the steam turbine does work and changes.
It should be noted that the controllable rectifier in fig. 1 is an adjustable regulated dc power supply, and is used for simulating a boiler system. The steam at the outlet of the superheater of the actual boiler is led out through a header and is converged into a main pipe through an isolation valve, and the pressure of the main pipe is controlled to be constant by one boiler or a plurality of boilers. The direct-current voltage of the rectifier is connected in parallel to simulate the change of the steam pressure of a boiler system, one rectifier or a plurality of rectifiers maintain the pressure of the parallel bus to be constant, and the pressure of the simulation main pipe is constant.
It should be noted that the first rheostat in fig. 1 is an equivalent rheostat of a regulating valve, and is used for simulating a high-pressure regulating valve of a steam turbine. The first rheostat is an adjustable resistor and has a real-time adjusting function, and is controlled by the speed-regulating control unit to change the resistance value according to the rotating speed and the output electric power so as to control the high-voltage adjusting valve of the steam turbine. When the steam inlet amount of the steam turbine is increased and the generating capacity of the generator is increased, the adjustable resistance value is reduced, the equivalent valve opening is increased, and when the steam inlet amount of the steam turbine is reduced, the operation is opposite.
The DC/DC converter of fig. 1 is used to simulate a steam turbine cylinder. Three DC/DC converters are connected in series to simulate high, medium and low pressure cylinders of a steam turbine. A second rheostat is connected between every two adjacent serially connected DC/DC converters, the resistance value of the second rheostat is changed, the output voltage of the corresponding DC/DC converter is changed, and the output power of the direct current motor is changed; the change of the opening of the main steam regulating valve is simulated, the steam quantity is changed, and the work of the steam turbine is changed.
It should be noted that the second varistor in fig. 1 is an equivalent varistor of the extraction valve, and is used for simulating the extraction rotary diaphragm of the steam turbine. The second rheostat is an adjustable resistor and has a real-time adjusting function, and is controlled by the steam extraction adjusting unit, the resistance value is changed according to the steam extraction amount, and the effect of acting on the steam turbine is simulated. The steam extraction amount of the steam turbine is increased, the generating capacity of the generator is reduced, the adjustable resistance is increased, the armature current of the direct current motor is reduced, the equivalent work of the steam turbine is reduced, and the operation is opposite when the steam extraction amount is reduced.
It should be noted that the generator in fig. 1 is coaxially connected to the dc motor, and may simulate the electromagnetic process and the electromechanical process of the actual motor.
Wherein, the controllable rectifier works as follows:
P1＝idcvdcequation 1
Wherein P1 is the power of rectifier, idcIs the rectifier current, vdcIs a rectifier dc voltage.
Wherein, the work formula of the steam turbine is as follows:
p2 ═ Δ hQ formula 2
Wherein, P2 is the work power of the steam turbine, Δ h is the work enthalpy drop of the steam turbine, and Q is the steam flow.
The work power of the DC/DC converter is as follows:
p3 ═ Δ h3Q1 formula 3
P4 ═ Δ h4Q2 formula 4
P2 ═ P3+ P4 formula 5
Wherein, P3 and P4 are the work power of the DC/DC converter, namely the work power of the high-pressure cylinder and the medium-low pressure cylinder of the steam turbine, P2 is the work power of the steam turbine, delta h3 is the work enthalpy drop of the high-pressure cylinder of the steam turbine, Q1 is the steam flow of the high-pressure cylinder, delta h4 is the work enthalpy drop of the medium-low pressure cylinder of the steam turbine, and Q2 is the steam flow of the medium-low pressure cylinder.
The torque characteristics of the direct current motor are as follows:
U＝E+IRa+IR0equation 6
E＝CePhi n equation 7
T＝CTPhi I equation 9
P5 ═ T Ω equation 10
Wherein U is the rectifier output voltage, E is the motor armature electromotive force, RaIs armature loop resistance, R0For adjustable resistance, I is armature current, CePhi is the air gap flux, n is the DC motor speed, T is the DC motor electromagnetic torque, P5 is the DC motor work power, and omega is the DC motor angular velocity.
It will be appreciated that the rectifier DC voltage is proportional to the boiler main steam pressure, from equation 1, by regulating the current idcThe direct current voltage can be kept constant, and the pressure of the main steam of the boiler is equivalent to be constant.
It can be understood that if the opening of the regulating valve of the steam turbine is increased, the steam flow is increased and the work capacity of the steam turbine is increased according to the formula 2.
It can be understood that the direct current motor changes the resistance value of the first rheostat, the rotating speed is unchanged from the formulas 6 and 7, the E is unchanged, the I is increased, and the torque of the direct current motor is increased from the formulas 9 and 10, so that the power is increased. Or according to the formula 8, the resistance of the first rheostat is changed, the voltage at two ends of the motor is increased, the torque is increased, and the power is increased.
It can be understood that, when the steam extraction amount is increased, the resistance value of the second rheostat is changed by the direct current motor, the rotating speed is unchanged, the E is unchanged, the I is reduced, and the torque of the direct current motor is reduced and the power is reduced by the formulas 9 and 10. Or according to the formula 8, the resistance of the second rheostat is changed, the voltage at two ends of the motor is reduced, the torque is reduced, and the power is reduced.
As can be seen from the above description, the constant direct-current pressure of the rectifier simulates the constant main steam pressure of the boiler; the DC/DC converter is used for simulating the flow change and the power change of a steam turbine according to the voltage change and the power change of the DC/DC converter; the thermoelectric unit simulation method and the thermoelectric unit simulation system can better simulate the steam extraction thermoelectric unit.
According to the technical scheme, the steam extraction and heat supply unit simulation system provided by the embodiment adopts a direct-current circuit to simulate a steam system, specifically adopts an adjustable voltage-stabilizing direct-current power supply to simulate a boiler, adopts a plurality of DC/DC converters connected in series and a direct-current motor connected with the DC/DC converters to simulate each cylinder of a steam turbine, and adopts a first rheostat to simulate a high-pressure adjusting valve of the steam turbine; and simulating a steam extraction rotary clapboard of the steam turbine by adopting a second rheostat. The adjustable voltage-stabilizing direct-current power supply is used for providing stable direct-current voltage and equivalent steam main pipe pressure, the adjustable voltage-stabilizing direct-current power supply outputs the stable direct-current voltage and provides power supplies of a plurality of series-connected DC/DC converters through a rheostat, the plurality of series-connected DC/DC converters and a direct-current motor connected with the DC/DC converters simulate a steam turbine and drag a synchronous generator to generate electricity; the first rheostat is an equivalent rheostat of a regulating valve, is controlled by the speed regulating control unit, changes the resistance value according to the rotating speed and the output electric power, and simulates a high-pressure regulating valve of the steam turbine. The second rheostat is an equivalent rheostat of a steam extraction valve, the second rheostat is connected to the negative electrode of the adjustable voltage-stabilizing direct-current power supply from the middle of the two serially-connected DC/DC converters, and the second rheostat is controlled by the steam extraction adjusting unit, changes the resistance value according to the steam extraction amount, and is used for simulating the steam extraction of the steam turbine to rotate the partition plate and adjusting the steam extraction amount. Therefore, the steam extraction heat supply unit simulation system provided by the embodiment is suitable for simulating a steam extraction thermoelectric unit, and has the advantages of flexibility in operation, safety, reliability, easiness in implementation and the like.
In a preferred embodiment, the steam extraction and heat supply unit simulation system comprises m steam extraction and heat supply unit simulation units, wherein m is greater than or equal to 2. For example, m takes the values of 3, 4, 5 and the like.
In a preferred embodiment, the system further comprises: an excitation unit; the excitation unit is connected with the generator and used for adjusting the output voltage of the generator.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects.
The above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an extraction heating unit analog system, its characterized in that includes at least one extraction heating unit analog unit, extraction heating unit analog unit includes: the system comprises an adjustable voltage-stabilizing direct-current power supply, a first rheostat, a second rheostat, a plurality of DC/DC converters connected in series, a direct-current motor, a generator, a speed-regulating control unit and a steam extraction regulating unit;
the adjustable voltage-stabilizing direct-current power supply is connected with a first end of the first rheostat, and a second end of the first rheostat is connected with the plurality of DC/DC converters which are connected in series; the control end of the first rheostat is connected with the speed regulation control unit; the first rheostat is an equivalent rheostat of a regulating valve;
the direct current motor is connected with two DC/DC converters which are connected in series, fixed excitation is adopted by the direct current motor, and the direct current motor is coaxially connected with the generator; the second variable resistor is connected to the negative electrode of the adjustable voltage-stabilizing direct-current power supply from the middle of the two DC/DC converters connected in series, and the second variable resistor is an equivalent variable resistor of the steam extraction valve;
the adjustable voltage-stabilizing direct-current power supply provides stable direct-current voltage to be output to the plurality of DC/DC converters connected in series, maintains the voltage stability of the direct-current loop, and is used for equivalent steam main pipe pressure to simulate a boiler system;
the first rheostat is arranged between the adjustable voltage-stabilizing direct-current power supply and the plurality of DC/DC converters connected in series and used for simulating a high-voltage adjusting valve of the steam turbine and adjusting the current of a direct-current loop;
the speed regulation control unit is connected with the control end of the first rheostat and used for changing the resistance value of the first rheostat according to the rotating speed of the direct-current motor and the output power of the generator, so that the first rheostat simulates a high-voltage adjusting valve of a steam turbine and adjusts the current of a direct-current loop;
the plurality of DC/DC converters connected in series and the DC motors connected with the DC/DC converters are used for simulating cylinders at each stage of the steam turbine and dragging the synchronous generator to generate electricity, if the steam turbine has N-1-stage steam extraction, N DC/DC converters, 1 DC motor and N-1 second rheostat are arranged, and N is more than or equal to 1; each direct current motor corresponds to N adjacent series-connected DC/DC converters, and a second rheostat is connected between the two adjacent series-connected DC/DC converters;
the second rheostat is connected to the negative electrode of the pressure stabilizing source from the middle of the two serially connected DC/DC converters, the control end of the second rheostat is connected with the steam extraction adjusting unit, and the resistance value is changed according to the steam extraction amount under the control of the steam extraction adjusting unit and is used for simulating a steam extraction rotating partition plate of a steam turbine and adjusting the steam extraction amount.
2. The system of claim 1, wherein the steam extraction and heat supply unit simulation system comprises m steam extraction and heat supply unit simulation units, and m is greater than or equal to 2.
3. The system of claim 1, wherein the steam extraction and heating unit simulation unit comprises three DC/DC converters connected in series, two second varistors and a DC motor for simulating high, medium and low pressure cylinders of the steam turbine.
4. The system of claim 3, wherein the adjustable regulated DC power supply is configured to simulate a boiler system producing steam, three DC/DC converters are connected in series, and simulated steam is passed through high, medium, and low pressure cylinders in sequence; the resistance value change of the first rheostat simulates the opening change of a high-pressure adjusting valve of the steam turbine, the steam quantity changes, and the steam turbine does work and changes.
5. The system of claim 1, wherein the regulated dc power supply is a controllable rectifier.
6. The system of claim 5, wherein the controllable rectifier performs the following:
P1＝idcvdc
wherein P1 is the power of the controlled rectifier, idcIs a controlled rectifier current, vdcIs a controlled rectifier dc voltage.
7. The system of claim 1, wherein the turbine is configured to produce power as:
P2＝ΔhQ
wherein, P2 is the work power of the turbine, Δ h is the work enthalpy drop of the turbine, and Q is the steam flow.
8. The system of claim 1, wherein the DC/DC converter applies power of:
P3＝Δh3Q1
P4＝Δh4Q2
P2＝P3+P4
wherein, P3 and P4 are the work power of the DC/DC converter, namely the work power of the high-pressure cylinder and the medium-low pressure cylinder of the steam turbine, P2 is the work power of the steam turbine, delta h3 is the work enthalpy drop of the high-pressure cylinder of the steam turbine, Q1 is the steam flow of the high-pressure cylinder, delta h4 is the work enthalpy drop of the medium-low pressure cylinder of the steam turbine, and Q2 is the steam flow of the medium-low pressure cylinder.
9. The system of claim 1, further comprising: an excitation unit; the excitation unit is connected with the generator and used for adjusting the output voltage of the generator.
10. The system of claim 1, wherein the regulated dc power supply provides a regulated dc voltage proportional to the steam header pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810906329.2A CN110824355B (en) | 2018-08-10 | 2018-08-10 | Steam extraction heat supply unit simulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810906329.2A CN110824355B (en) | 2018-08-10 | 2018-08-10 | Steam extraction heat supply unit simulation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110824355A true CN110824355A (en) | 2020-02-21 |
| CN110824355B CN110824355B (en) | 2021-08-31 |
Family
ID=69541077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810906329.2A Active CN110824355B (en) | 2018-08-10 | 2018-08-10 | Steam extraction heat supply unit simulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110824355B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790910A (en) * | 2021-08-06 | 2021-12-14 | 苏州西热节能环保技术有限公司 | System for be used for rubbish environmental protection power plant steam turbine performance test |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2496992C1 (en) * | 2012-07-27 | 2013-10-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ФГБОУ ВПО "КубГТУ") | Method of operation of thermal power plant |
| US20150185716A1 (en) * | 2013-12-31 | 2015-07-02 | General Electric Company | Methods and systems for enhancing control of power plant generating units |
| CN104808511A (en) * | 2015-02-15 | 2015-07-29 | 山东大学 | Power plant simulation system taking frequency deviation into consideration |
| CN106780103A (en) * | 2016-11-17 | 2017-05-31 | 哈尔滨工业大学 | A kind of direct current cooker, steam turbine, electric network coordination control method for primary frequency modulation analysis |
| CN206256936U (en) * | 2016-10-14 | 2017-06-16 | 华电滕州新源热电有限公司 | A kind of primary frequency modulation optimal control device drawn gas based on heat supply |
| CN107329082A (en) * | 2017-07-25 | 2017-11-07 | 航天推进技术研究院 | A kind of electrical system and application process for ORC generating set Performance Assessments |
| CN108170924A (en) * | 2017-12-21 | 2018-06-15 | 西安交通大学 | One kind is for Steam Generators in NPP heat transfer pipe plug stream condition model method for building up |
-
2018
- 2018-08-10 CN CN201810906329.2A patent/CN110824355B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2496992C1 (en) * | 2012-07-27 | 2013-10-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ФГБОУ ВПО "КубГТУ") | Method of operation of thermal power plant |
| US20150185716A1 (en) * | 2013-12-31 | 2015-07-02 | General Electric Company | Methods and systems for enhancing control of power plant generating units |
| CN104808511A (en) * | 2015-02-15 | 2015-07-29 | 山东大学 | Power plant simulation system taking frequency deviation into consideration |
| CN206256936U (en) * | 2016-10-14 | 2017-06-16 | 华电滕州新源热电有限公司 | A kind of primary frequency modulation optimal control device drawn gas based on heat supply |
| CN106780103A (en) * | 2016-11-17 | 2017-05-31 | 哈尔滨工业大学 | A kind of direct current cooker, steam turbine, electric network coordination control method for primary frequency modulation analysis |
| CN107329082A (en) * | 2017-07-25 | 2017-11-07 | 航天推进技术研究院 | A kind of electrical system and application process for ORC generating set Performance Assessments |
| CN108170924A (en) * | 2017-12-21 | 2018-06-15 | 西安交通大学 | One kind is for Steam Generators in NPP heat transfer pipe plug stream condition model method for building up |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790910A (en) * | 2021-08-06 | 2021-12-14 | 苏州西热节能环保技术有限公司 | System for be used for rubbish environmental protection power plant steam turbine performance test |
| CN113790910B (en) * | 2021-08-06 | 2024-05-28 | 苏州西热节能环保技术有限公司 | System for be used for rubbish environmental protection power plant steam turbine performance test |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110824355B (en) | 2021-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Belmokhtar et al. | Novel fuzzy logic based sensorless maximum power point tracking strategy for wind turbine systems driven DFIG (doubly-fed induction generator) | |
| CN108270241B (en) | Control method of virtual synchronous generator of fan grid-connected inverter | |
| Nayak et al. | Modeling and performance analysis of microturbine generation system in grid connected/islanding mode | |
| CN103762919B (en) | Output control device and method for direct-drive aerogenerator low voltage crossing | |
| CN103414209B (en) | DFIG direct current grid-connected power generation system based on RMC and torque control method of DFIG direct current grid-connected power generation system | |
| Nayanar et al. | Wind-driven SEIG supplying DC microgrid through a single-stage power converter | |
| CN104092235A (en) | Doubly-fed generator set AC/DC grid-connected system, and method and application | |
| Izadbakhsh et al. | Dynamic analysis of PMSG wind turbine under variable wind speeds and load conditions in the grid connected mode | |
| CN103939290B (en) | Simulation wind turbine generator suitable for virtual inertia optimization control research | |
| CN110824355B (en) | Steam extraction heat supply unit simulation system | |
| CN109444737A (en) | It is a kind of meter and crow bar operating time of protection double-fed blower three short circuit current analytic method | |
| Mehroliya et al. | Comparative analysis of conventional technologies and emerging trends in wind turbine generator | |
| CN108919029A (en) | It is a kind of meter and RSC control double-fed blower three short circuit current analytic method | |
| Rani et al. | Compensation of magnetizing current for enhanced operation of DFIG under grid unbalance | |
| CN110767048B (en) | Steam extraction heat supply generating set simulation system | |
| CN103511086A (en) | Differential rotational speed control method for gas turbine-synchronous generator unit | |
| CN110763995B (en) | Steam pressure control simulation system of steam extraction thermoelectric unit | |
| CN110761860B (en) | Thermoelectric unit simulation system | |
| CN111120222B (en) | Real wind condition wind power generation simulation device with wind shear and tower shadow effects | |
| CN110767047B (en) | Multi-axis simulation system of thermoelectric unit | |
| CN110761858B (en) | Reheating generator set simulation system | |
| Breban et al. | Direct active and reactive power control of variable-speed doubly-fed induction generator on micro-hydro energy conversion system | |
| CN103248292B (en) | A kind of control method for mechanical energy storage system | |
| Zhao et al. | Maximal power point tracking under speed-mode control for wind energy generation system with doubly fed introduction generator | |
| CN109426676A (en) | Extensive polymorphic type wind-solar power supply combines grid-connected system emulation analysis method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231005 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Sinopec (Dalian) Petrochemical Research Institute Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC Corp. |
|
| TR01 | Transfer of patent right |