CN214704337U - Coordinated control system for adjusting electricity and heat loads of cogeneration unit - Google Patents
Coordinated control system for adjusting electricity and heat loads of cogeneration unit Download PDFInfo
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- CN214704337U CN214704337U CN202023222933.5U CN202023222933U CN214704337U CN 214704337 U CN214704337 U CN 214704337U CN 202023222933 U CN202023222933 U CN 202023222933U CN 214704337 U CN214704337 U CN 214704337U
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Abstract
The utility model discloses a coordinated control system for adjusting electricity and heat load of a cogeneration unit, which comprises a unit control system, a boiler control system, a heat supply steam control system and a cogeneration unit; wherein, unit control system includes first processing unit, second processing unit and load instruction input unit, boiler control system includes boiler controller and boiler regulating unit, heat supply steam control system includes the heat supply controller, wherein, load instruction input unit is connected with first processing unit electricity, second processing unit, boiler controller are connected with first processing unit electricity, boiler controller is connected with boiler regulating unit electricity, boiler controller, second processing unit hardware support and heat supply controller all are connected with the cogeneration unit electricity, adjust for cogeneration unit heat load and provide the support with the electricity load.
Description
Technical Field
The utility model belongs to combined heat and power generation thermal generator set's control field especially relates to combined heat and power generation unit electricity, heat load regulation coordinated control system.
Background
With the progress of the thirteen-five planning, the scale of the cogeneration generator set is gradually enlarged, and the heating steam supply and the industrial steam required by the heat load are gradually increased. However, no suitable control system exists for the cogeneration unit at present, the traditional unit coordination control system is designed for a pure generator set, the applicability of the system to the cogeneration unit is poor, the whole control system is not only lack of a heating steam extraction load adjusting means, but also a fuel quantity instruction B received by a boiler control system is only sent out based on an electric load, and the quick adaptability of the boiler is poor.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a coordinated control system is adjusted to combined heat and power generation unit electricity, heat load.
The specific scheme is as follows:
a coordinated control system for adjusting electricity and heat loads of a cogeneration unit comprises a unit control system, a boiler control system, a heat supply steam control system and the cogeneration unit; wherein, unit control system includes first processing unit, second processing unit and load instruction input unit, boiler control system includes boiler controller and boiler regulating unit, heat supply steam control system includes the heat supply controller, wherein, load instruction input unit is connected with first processing unit electricity, second processing unit, boiler controller are connected with first processing unit electricity, boiler controller is connected with boiler regulating unit electricity, boiler controller, second processing unit and heat supply controller all are connected with the cogeneration unit electricity.
The boiler controller, the second processing unit and the heat supply controller are all provided with summers, the second processing unit and the heat supply controller are electrically connected with the first processing unit through the summers, and the boiler controller is electrically connected with the cogeneration unit through the summers.
The combined heat and power generation unit comprises a boiler, a steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder and a generator, wherein a main steam regulating valve is arranged between the boiler and the steam turbine high-pressure cylinder, the boiler is connected with a steam turbine high-pressure cylinder pipeline through the main steam regulating valve, a reheater is arranged in the boiler, and the steam turbine high-pressure cylinder is connected with the steam turbine medium-pressure cylinder pipeline through the reheater.
The steam turbine is characterized in that an air supply regulating valve is arranged on the steam turbine intermediate pressure cylinder, a low pressure regulating valve is arranged on the steam turbine low pressure cylinder, the steam turbine intermediate pressure cylinder is used for exhausting air through the air supply regulating valve, the steam turbine intermediate pressure cylinder is connected with a steam turbine low pressure cylinder pipeline through the low pressure regulating valve, and the generator is connected with the steam turbine low pressure cylinder in a rotating mode.
And a condenser, a feed pump and a water supply control valve are arranged between the turbine low-pressure cylinder and the boiler, and the turbine low-pressure cylinder is connected with a boiler pipeline sequentially through the condenser, the feed pump and the water supply control valve.
The boiler regulating unit comprises a belt conveyor, a fan and a water pump, and the belt conveyor, the fan and the water pump are all connected with a boiler pipeline.
The main steam regulating valve is electrically connected with the second processing unit, and the low-pressure regulating valve is electrically connected with the heat supply controller.
The boiler is provided with a pipeline pressure sensor, the gas supply regulating valve is provided with a heat meter, the generator is provided with an electric power sensor,
the boiler controller, the second processing unit and the heat supply controller are electrically connected with the pipeline pressure sensor through the adder;
the boiler controller, the second processing unit and the heat supply controller are electrically connected with the heat meter through the adder;
the boiler controller, the second processing unit and the heat supply controller are all electrically connected with the pipeline electric power sensor through the adder,
the boiler controller, the second processing unit and the heat supply controller are all electrically connected with the load instruction input unit through the summator.
The load instruction input unit comprises an electric load instruction input unit, a heat load instruction input unit and a pressure instruction input unit, the electric load instruction input unit and the heat load instruction input unit are electrically connected with the first processing unit, and the electric load instruction input unit, the heat load instruction input unit and the pressure instruction input unit are touch screens.
The first processing unit, the second processing unit, the boiler controller and the heat supply controller are all PLC controllers.
The utility model discloses a coordinated control system is adjusted to combined heat and power units electricity, heat load, unit control system, boiler control system and heat supply steam control system coordinated control respectively, adjust and provide the hardware support with the electricity load for combined heat and power units heat load.
Drawings
Fig. 1 is a system diagram of a coordinated control principle of a cogeneration generator set.
Wherein G is0Is total load instruction of boiler, B is fuel quantity, mu1Mainly regulating the opening degree of a valve, mu, by steam2Opening of main steam regulating valve, NeActual generating power of the unit, N0Set value P for generating power of unitTFor the actual pressure, P, of the steam at the inlet of the turbine0Setting value of steam pressure at inlet of steam turbine, Q actual load of steam extraction and heat supply of steam turbine, and Q0And giving a given value for the heat load of the steam extraction of the steam turbine.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the implementations of the present invention, and not all implementations, and all other embodiments obtained by those skilled in the art without any inventive work are included in the scope of the present invention.
As shown in fig. 1, a coordinated control system for adjusting electricity and heat loads of a cogeneration unit comprises a unit control system, a boiler control system, a heating steam control system and the cogeneration unit; wherein, unit control system includes first processing unit 9, second processing unit 8 and load instruction input unit, boiler control system includes boiler controller 7 and boiler regulating unit, heat supply steam control system includes heat supply controller 12, wherein, load instruction input unit is connected with first processing unit 9 electricity, second processing unit 8, boiler controller 7 are connected with first processing unit 9 electricity, boiler controller 7 is connected with boiler regulating unit electricity, boiler controller 7, second processing unit 8 and heat supply controller 12 all are connected with the cogeneration unit electricity.
The boiler controller 7, the second processing unit 8 and the heat supply controller 12 are all provided with adders 23, the second processing unit 8 and the heat supply controller 12 are electrically connected with the first processing unit 9 through the adders 23, and the boiler controller 7 is electrically connected with a cogeneration unit through the adders 23.
The cogeneration unit includes boiler 1, steam turbine high pressure cylinder 16, steam turbine intermediate pressure cylinder 17, steam turbine low pressure cylinder 18 and generator 13, be provided with main steam governing valve 20 between boiler and the steam turbine high pressure cylinder 16, the boiler passes through main steam governing valve 20 and 16 pipe connections of steam turbine high pressure cylinder, be provided with re-heater 2 in the boiler 1, steam turbine high pressure cylinder 16 passes through re-heater 2 and 17 pipe connections of steam turbine intermediate pressure cylinder.
The steam turbine intermediate pressure cylinder 17 is provided with an air supply adjusting valve 21, the steam turbine low pressure cylinder 18 is provided with a low pressure adjusting valve 14, the steam turbine intermediate pressure cylinder 17 performs air extraction through the air supply adjusting valve 21, the steam turbine intermediate pressure cylinder 17 is connected with the steam turbine low pressure cylinder 18 through the low pressure adjusting valve 14 in a pipeline mode, and the generator 13 is connected with the steam turbine low pressure cylinder 18 in a rotating mode.
A condenser 19, a feed pump 15 and a feed control valve 3 are arranged between the turbine low-pressure cylinder 18 and the boiler 1, and the turbine low-pressure cylinder 18 is connected with the boiler 1 through pipelines sequentially through the condenser 19, the feed pump 15 and the feed control valve 3.
The boiler regulating unit comprises a belt conveyor 4, a fan 5 and a water pump 6, wherein the belt conveyor 4, the fan 5 and the water pump 6 are all connected with the boiler 1 through pipelines.
The main steam regulating valve 20 is electrically connected with the second processing unit 8, and the low pressure regulating valve 14 is electrically connected with the heating controller 12.
A pipeline pressure sensor is arranged on the boiler 1, a heat meter is arranged on the gas supply regulating valve 21, an electric power sensor is arranged on the generator 13,
the boiler controller 7, the second processing unit 8 and the heat supply controller 12 are all electrically connected with the pipeline pressure sensor through an adder 23;
the boiler controller 7, the second processing unit 8 and the heat supply controller 12 are all electrically connected with the heat meter through an adder 23;
the boiler controller 7, the second processing unit 8 and the heat supply controller 12 are all electrically connected with the pipeline electric power sensor through an adder 23,
the boiler controller 7, the second processing unit 8 and the heat supply controller 12 are all electrically connected with the load instruction input unit through an adder 23.
The load instruction input unit comprises an electrical load instruction input unit 10, a thermal load instruction input unit 11 and a pressure instruction input unit 24, the electrical load instruction input unit 10 and the thermal load instruction input unit 11 are electrically connected with the first processing unit 9, and the electrical load instruction input unit 10, the thermal load instruction input unit 11 and the pressure instruction input unit 24 are touch screens.
The first processing unit 9, the second processing unit 8, the boiler 1 controller 7 and the heat supply controller 12 are all PLC controllers.
The specific working process of the coordination control system for adjusting the electricity and the heat load of the cogeneration unit is as follows:
steam generated by the boiler 1 is transmitted to the steam turbine high pressure cylinder 16 through the main steam regulating valve 20, the steam turbine high pressure cylinder 16 compresses the steam into high pressure, then the high temperature and high pressure steam is transmitted to the steam turbine intermediate pressure cylinder 17 through the reheater 2, the steam of the steam turbine intermediate pressure cylinder 17 is transmitted to the heat supply network 22 through the air supply regulating valve 21, the steam amount entering the heat supply network can be regulated by the regulating low pressure regulating valve 14, the steam in the steam turbine intermediate pressure cylinder 17 is transmitted to the steam turbine low pressure cylinder 18 through the low pressure regulating valve 14, and the steam turbine low pressure cylinder 18 rotates to drive the motor 13 to do work.
The steam after the work of the steam turbine low pressure cylinder 18 is discharged and condensed into water by the condenser 19, and then the water is delivered to the boiler 1 through the feed water pump 16 and the feed water control valve 3 to be evaporated into steam again.
The first unit 9 receives the heat load instruction, the electric load instruction and the pressure instruction, and compares the heat load instruction, the electric load instruction and the pressure instruction with the actual heat supply amount, the actual power generation power and the actual steam pressure in the cogeneration unit to obtain a corresponding heat load difference value delta Q, an electric load difference value delta N and a main steam pressure difference value delta P, wherein the heat load difference value delta Q, the electric load difference value delta N and the main steam pressure difference value delta P respectively act on the second processing unit 8, the boiler controller 7 and the heat supply controller 12;
the boiler controller 7 sends a total boiler load instruction G according to the first processor 90Adjusting the boiler fuel amount B, and according to the boiler fuel amount B, the belt conveyor 4, the fan 5 and theThe water pump 6 respectively adjusts the coal feeding amount, the air quantity and the water supply amount, and sequentially adjusts the steam amount output by the boiler 1.
The second processing unit 8 sends out a regulating instruction mu according to the heat load difference delta Q, the electric load difference delta N and the main steam pressure difference delta P1To the main steam regulating valve 20 to regulate the steam admission to the turbine high pressure cylinder 16;
the heat supply controller 12 sends out a regulating instruction mu according to the difference value delta Q of the heat load, the difference value delta N of the electric load and the difference value delta P of the main steam pressure2The opening of the low-pressure regulating valve 14 is regulated, and the heat supply quantity entering the heat supply network is regulated in turn.
The power and heat load regulation coordination control system of the cogeneration unit, the unit control system, the boiler control system and the heat supply steam control system are respectively coordinated and controlled to provide hardware support for the heat load regulation and the power load regulation of the cogeneration unit.
The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.
Claims (10)
1. A coordinated control system for adjusting electricity and heat loads of a cogeneration unit is characterized in that: the system comprises a unit control system, a boiler control system, a heat supply steam control system and a cogeneration unit; wherein, unit control system includes first processing unit (9), second processing unit (8) and load instruction input unit, boiler control system includes boiler controller (7) and boiler regulating unit, heat supply steam control system includes heat supply controller (12), wherein, load instruction input unit is connected with first processing unit (9) electricity, second processing unit (8), boiler controller (7) are connected with first processing unit (9) electricity, boiler controller (7) are connected with boiler regulating unit electricity, boiler (1) controller (7), second processing unit (8) and heat supply controller (12) all are connected with the cogeneration unit electricity.
2. The coordinated control system for power and heat load regulation of a cogeneration unit according to claim 1, wherein: the boiler controller (7), the second processing unit (8) and the heat supply controller (12) are all provided with adders (23), the second processing unit (8) and the heat supply controller (12) are all electrically connected with the first processing unit (9) through the adders (23), and the boiler controller (7) is electrically connected with a cogeneration unit through the adders (23).
3. The system of claim 2, wherein the cogeneration unit comprises: the combined heat and power generation unit comprises a boiler (1), a steam turbine high-pressure cylinder (16), a steam turbine intermediate-pressure cylinder (17), a steam turbine low-pressure cylinder (18) and a generator (13), a main steam regulating valve (20) is arranged between the boiler (1) and the steam turbine high-pressure cylinder (16), the boiler (1) is connected with the steam turbine high-pressure cylinder (16) through a pipeline of the main steam regulating valve (20), a reheater (2) is arranged in the boiler (1), and the steam turbine high-pressure cylinder (16) is connected with the steam turbine intermediate-pressure cylinder (17) through the reheater (2).
4. The coordinated control system for power and heat load regulation of a cogeneration unit according to claim 3, wherein: be provided with air feed governing valve (21) on steam turbine intermediate pressure cylinder (17), be provided with low pressure regulating valve (14) on steam turbine low pressure cylinder (18), steam turbine intermediate pressure cylinder (17) are bled through air feed governing valve (21), steam turbine intermediate pressure cylinder (17) are connected with steam turbine low pressure cylinder (18) pipeline through low pressure regulating valve (14), generator (13) and steam turbine low pressure cylinder (18) rotate and are connected.
5. The coordinated control system for power and heat load regulation of a cogeneration unit according to claim 4, wherein: a condenser (19), a water feeding pump (15) and a water feeding control valve (3) are arranged between the turbine low-pressure cylinder (18) and the boiler (1), and the turbine low-pressure cylinder (18) is connected with the boiler (1) through a pipeline sequentially through the condenser (19), the water feeding pump (15) and the water feeding control valve (3).
6. The coordinated control system for power and heat load regulation of a cogeneration unit according to claim 5, wherein: boiler (1) regulating unit includes band conveyer (4), fan (5) and water pump (6), band conveyer (4), fan (5) and water pump (6) all with boiler (1) pipe connection.
7. The coordinated control system for power and heat load regulation of a cogeneration unit according to claim 5, wherein: the main steam regulating valve (20) is electrically connected with the second processing unit (8), and the low-pressure regulating valve (14) is electrically connected with the heat supply controller (12).
8. The coordinated control system for power and heat load regulation of a cogeneration unit according to claim 5, wherein: a pipeline pressure sensor is arranged on the boiler (1), a heat meter is arranged on the gas supply regulating valve, an electric power sensor is arranged on the generator (13),
the boiler controller (7), the second processing unit (8) and the heat supply controller (12) are electrically connected with the pipeline pressure sensor through an adder (23);
the boiler controller (7), the second processing unit (8) and the heat supply controller (12) are electrically connected with the heat meter through an adder (23);
the boiler controller (7), the second processing unit (8) and the heat supply controller (12) are electrically connected with the pipeline electric power sensor through an adder (23),
the boiler controller (7), the second processing unit (8) and the heat supply controller (12) are electrically connected with the load instruction input unit through an adder (23).
9. The coordinated control system for power and heat load regulation of a cogeneration unit according to claim 1, wherein: the load instruction input unit comprises an electric load instruction input unit (10), a thermal load instruction input unit (11) and a pressure instruction input unit (24), the electric load instruction input unit (10) and the thermal load instruction input unit (11) are electrically connected with the first processing unit (9), and the electric load instruction input unit (10), the thermal load instruction input unit (11) and the pressure instruction input unit (24) are touch screens.
10. The coordinated control system for power and heat load regulation of a cogeneration unit according to claim 1, wherein: the first processing unit (9), the second processing unit (8), the boiler (1), the controller (7) and the heat supply controller (12) are all PLC controllers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023222933.5U CN214704337U (en) | 2020-12-28 | 2020-12-28 | Coordinated control system for adjusting electricity and heat loads of cogeneration unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023222933.5U CN214704337U (en) | 2020-12-28 | 2020-12-28 | Coordinated control system for adjusting electricity and heat loads of cogeneration unit |
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| CN214704337U true CN214704337U (en) | 2021-11-12 |
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| CN202023222933.5U Active CN214704337U (en) | 2020-12-28 | 2020-12-28 | Coordinated control system for adjusting electricity and heat loads of cogeneration unit |
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