CN108006783B - Distributed energy cogeneration control system and method - Google Patents
Distributed energy cogeneration control system and method Download PDFInfo
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- CN108006783B CN108006783B CN201711368655.4A CN201711368655A CN108006783B CN 108006783 B CN108006783 B CN 108006783B CN 201711368655 A CN201711368655 A CN 201711368655A CN 108006783 B CN108006783 B CN 108006783B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D1/00—Steam central heating systems
- F24D1/02—Steam central heating systems operating with live steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D1/00—Steam central heating systems
- F24D1/08—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1003—Arrangement or mounting of control or safety devices for steam heating systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
Abstract
The embodiment of the invention discloses a distributed energy cogeneration control system and a method, wherein the system comprises: the first control unit is used for collecting the steam pressure of a steam pipe network of an energy user, processing the steam pressure to respectively generate control components of the steam boiler and the heat storage device, and respectively controlling the steam boiler and the heat storage device according to the control components; the second control unit is used for acquiring energy data of the steam equipment, processing the energy data to generate a control quantity of the generator set and controlling the generator set according to the control quantity of the generator set; through the scheme of the embodiment, the operation modes of all the units are coordinated according to load change, the system is ensured to adapt to different working condition requirements, and the safe, stable and efficient operation is realized.
Description
Technical Field
The embodiment of the invention relates to a heat supply technology, in particular to a distributed energy cogeneration control system and a distributed energy cogeneration control method.
Background
Cogeneration (CHP) is the generation of heat and electricity from the same fuel. CHP takes many forms, involving many technologies, but is generally based on an integrated system of power generation and heat recovery. By exporting heat from electricity production for heating or industrial applications, CHP plants can typically convert 75-80% of fossil fuels to useful energy, with most modern CHP plants reaching efficiencies above 90%. As an important power device in a distributed energy system, the gas turbine cogeneration technology taking natural gas as fuel develops rapidly in recent years, the system not only generates electric energy, but also uses low-grade waste heat after power generation for heat supply, greatly improves the energy utilization rate, and has good social benefit, energy-saving benefit and environmental benefit. The gas turbine cogeneration system can be used independently to provide two energies of heat and electricity for the region; the distributed power source system can be used as one of the distributed power sources, and the identity of one subsystem and other distributed power sources can play a role together in the distributed energy system.
For cogeneration, the most critical problem to be solved is to meet the demand change of users for heat and electricity at different time intervals as much as possible, that is, to reasonably solve the contradiction between the heat and electricity yield ratio of the cogeneration system and the demand ratio of users for heat and electricity, so that the cogeneration system achieves the optimal primary energy utilization efficiency, and especially in an energy system with a plurality of distributed power supplies, the operation modes of each unit need to be coordinated, and the heat supply hysteresis and the adverse effect caused by load change need to be considered.
Disclosure of Invention
In order to solve the technical problem, embodiments of the present invention provide a distributed energy cogeneration control system, which can coordinate operation modes of each unit according to load changes, ensure that the system is adapted to different working condition requirements, and operate safely, stably and efficiently.
To achieve the object of the embodiments of the present invention, the embodiments of the present invention provide a distributed energy cogeneration control system, including: a first control unit and a second control unit;
the first control unit is used for collecting the steam pressure of a steam pipe network of an energy user, processing the steam pressure to respectively generate control components of the steam boiler and the heat storage device, and respectively controlling the steam boiler and the heat storage device according to the control components;
the second control unit is used for acquiring energy data of the steam equipment, processing the energy data to generate a control quantity of the generator set and controlling the generator set according to the control quantity of the generator set;
the steam pipe network is used for providing steam energy for energy users; the steam boiler is used for generating steam energy through fuel gas; the generator set is used for generating electricity through gas; the heat storage device is used for storing redundant steam energy when the steam energy generated by the steam boiler and the waste heat steam boiler is excessive.
Optionally, the first control unit comprises: the system comprises a first acquisition module, a first processing module and a first control module which are connected in sequence;
the first acquisition module is used for acquiring the steam pressure of the steam pipe network;
the first processing module is used for calculating the control component of the steam boiler and the control component of the heat storage device according to the steam pressure of the steam pipe network;
and the first control module is used for controlling the steam boiler and the heat storage device according to the control components of the steam boiler and the heat storage device respectively.
Optionally, the first processing module comprises:
the steam pipe network pressure controller is used for calculating a feedback control component of steam pressure of the steam pipe network;
the first branch controller is used for acquiring the control component of the steam boiler according to the feedback control component of the steam pressure;
and a second sub-controller for obtaining a control component of the heat storage device based on the feedback control component of the steam pressure.
Optionally, the first control module comprises:
the first controller is connected with the first branch controller and is used for controlling the steam boiler according to the control component of the steam boiler and the steam flow generated by the steam boiler obtained by feedback;
and the second controller is connected with the second branch controller and is used for controlling the heat storage device according to the control component of the heat storage device and the heat storage steam flow of the heat storage device obtained by feedback.
Optionally, the second control unit comprises: the second acquisition module and the second processing module are sequentially connected;
the second acquisition module is used for acquiring energy data of the steam equipment; the steaming device includes: a waste heat steam boiler, a steam boiler and a heat storage device; the waste heat steam boiler is used for generating steam energy according to the smoke generated by the generator set;
and the second processing module is used for calculating the control quantity of the generator set according to the acquired energy data and controlling the generator set according to the control quantity of the generator set.
Optionally, the energy data comprises: the steam flow of the waste heat steam boiler, the steam flow generated by the steam boiler and the heat storage steam flow of the heat storage device.
Optionally, the second processing module comprises:
the second calculator is used for calculating the total output steam flow according to the steam flow of the waste heat steam boiler, the steam flow generated by the steam boiler and the heat storage steam flow of the heat storage device;
the third calculator is used for calculating a second control quantity according to the output total steam flow and a preset second algorithm;
and the signal selector is used for acquiring the control quantity of the generator set according to the calculated second control quantity, the feedback signal of the signal selector and the switching value signal and controlling the generator set according to the control quantity of the generator set.
The embodiment of the invention also provides a distributed energy cogeneration control method, which comprises the following steps:
collecting steam pressure of a steam pipe network of an energy user, processing the steam pressure to respectively generate control components of a steam boiler and a heat storage device, and respectively controlling the steam boiler and the heat storage device according to the control components; and the number of the first and second groups,
collecting energy data of steam equipment, processing the energy data to generate a control quantity of a generator set, and controlling the generator set according to the control quantity of the generator set;
the steam pipe network is used for providing steam energy for energy users; the steam boiler is used for generating steam energy through fuel gas; the generator set is used for generating electricity through gas; the heat storage device is used for storing redundant steam energy when the steam energy generated by the steam boiler and the waste heat steam boiler is excessive.
Optionally, the steaming device comprises: a waste heat steam boiler, a steam boiler and a heat storage device; the waste heat steam boiler is used for generating steam energy according to the smoke generated by the generator set;
the energy data includes: the steam flow of the waste heat steam boiler, the steam flow generated by the steam boiler and the heat storage steam flow of the heat storage device.
Optionally, processing the steam pressure to generate control components for the steam boiler and the thermal storage device, respectively, comprises: calculating a feedback control component of the steam pressure of the steam pipe network; acquiring a control component of the steam boiler and a control component of the heat storage device according to the feedback control component of the steam pressure;
processing the energy data to generate a control quantity for the generator set includes:
calculating the total output steam flow according to the steam flow of the waste heat steam boiler, the steam flow generated by the steam boiler and the heat storage steam flow of the heat storage device; calculating a second control quantity according to the output total steam flow and a preset second algorithm; and acquiring the control quantity of the generator set according to the calculated second control quantity, the feedback signal of the signal selector and the switching value signal.
The embodiment of the invention comprises the following steps: the first control unit is used for acquiring the steam pressure of a steam pipe network of an energy user, processing the steam pressure according to the steam pressure to generate control components of the steam boiler and the heat storage device respectively, and controlling the steam boiler and the heat storage device respectively according to the control components; the second control unit is used for acquiring energy data of the steam equipment, processing the energy data to generate a control quantity of the generator set and controlling the generator set according to the control quantity of the generator set; the steam pipe network is used for providing steam energy for energy users; the steam boiler is used for generating steam energy through fuel gas; the generator set is used for generating electricity through gas; the heat storage device is used for storing redundant steam energy when the steam energy generated by the steam boiler and the waste heat steam boiler is excessive. Through the scheme of the embodiment, the operation modes of all the units are coordinated according to the load change, the system can meet the requirements of different working conditions, and the safe, stable and efficient operation is realized.
Additional features and advantages of embodiments of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of the invention. The objectives and other advantages of the embodiments of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the examples of the application do not constitute a limitation of the embodiments of the invention.
Fig. 1 is a schematic diagram of a distributed energy cogeneration control system according to an embodiment of the invention;
FIG. 2 is a schematic view of a steam power supply system according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a first control unit according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a second control unit according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a detailed structure of a distributed energy cogeneration control system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
To achieve the object of the embodiment of the present invention, an embodiment of the present invention provides a distributed energy cogeneration control system, as shown in fig. 1, the system includes: a first control unit 1 and a second control unit 2;
the first control unit 1 is used for processing the steam pressure of a steam pipe network of an energy user to respectively generate control components of a steam boiler Y3 and a heat storage device Y4 and respectively control the steam boiler Y3 and the heat storage device Y4 according to the control components;
the second control unit 2 is used for acquiring energy data of the steam equipment, processing the energy data to generate a control quantity of the generator set Y1, and controlling the generator set Y1 according to the control quantity of the generator set Y1;
the steam pipe network is used for providing steam energy for energy users; the steam boiler Y3 is used for generating steam energy through fuel gas; the generator set Y1 is used for generating electricity through fuel gas; the heat storage device Y4 is used to store excess steam energy when the steam energy generated by the steam boiler Y3 and the heat recovery steam boiler Y2 is excessive.
In the embodiment of the present invention, as shown in fig. 2, a schematic diagram of a steam energy supply system according to the embodiment of the present invention is shown. The power generation unit Y1 and the steam boiler Y3 are respectively connected with a fuel gas pipeline, the power generation unit Y1 can generate power through fuel gas, the steam boiler Y3 can generate steam energy through fuel gas, and a control valve VFb is arranged in a communication passage between the steam boiler Y3 and the fuel gas pipeline. Because the generating set Y1 can generate smoke in the power generation process through fuel gas, in order to make full use of the smoke, a waste heat steam boiler Y2 can be arranged, and the waste heat steam boiler Y2 is used for generating steam energy according to the smoke generated by the generating set Y1.
In the embodiment of the invention, based on the above steam energy supply system, when the steam energy demand of each energy user, such as user 1, user 2, … …, and user m, is large, the waste heat steam boiler Y2 and the steam boiler Y3 can be controlled to increase the steam generation amount, so as to meet the user demand; however, when the user's demand for steam energy is small, the heat recovery steam boiler Y2 and the steam boiler Y3 may be controlled to reduce the steam generation amount. However, for the whole system, there is a certain reaction time for any control, so that the user experience is poor and the reasonable energy supply cannot be realized if the energy is not supplied in time or the excessive energy is generated by the waste heat steam boiler Y2 and the steam boiler Y3. For the above reason, the thermal storage device Y4 may be provided. The heat storage device Y4 is connected to the heat recovery steam boiler Y2 and the steam boiler Y3, respectively, and is configured to store excess steam energy when the steam energy generated by the steam boiler Y3 and the heat recovery steam boiler Y2 is excessive.
In the embodiment of the present invention, based on the above, a control system based on the above steam-energy supply system is provided, which can respectively collect different energy data through two control units, thereby implementing closed-loop control on the generator set Y1, the steam boiler Y3 and the heat storage device Y4 in the steam-energy supply system. The control of the waste heat steam boiler Y2 can be indirectly realized by controlling the generator set Y1.
Alternatively, as shown in fig. 3 and 5, the first control unit 1 may include: the system comprises a first acquisition module 11 and a first processing module 12 which are connected in sequence;
the first acquisition module 11 is used for acquiring the steam pressure P of the steam pipe network.
The first processing module 12 is configured to calculate a control component of the steam boiler and a control component of the heat storage device according to the steam pressure P of the steam pipe network.
Optionally, the first processing module 12 may include:
the steam pipe network pressure controller A1 is used for calculating a feedback control component of the steam pipe network steam pressure;
a first sub-controller A4 for obtaining a control component of the steam boiler according to the feedback control component of the steam pressure P;
the second sub-controller a5 for obtaining a control component of the heat storage device based on the feedback control component of the steam pressure P.
In the embodiment of the present invention, the steam pipe network pressure controller a1 can calculate the feedback control component according to a preset algorithm, and does not limit the specific calculation method. For example, the preset algorithm may include, but is not limited to, a PID algorithm (proportional-integral-derivative algorithm) or a PD algorithm (proportional-derivative algorithm), and its control algorithm may be self-defined according to a specific application scenario.
In the embodiment of the present invention, the output of the steam pipe network pressure controller A1 can be recorded as A1O, and the output terminal of the steam pipe network pressure controller A1 is connected to the input terminals of the first branch controller a4 and the second branch controller a5, respectively. The output A1O of the steam pipe network pressure controller A1 is used as an input to a first branch controller a4 and a second branch controller a 5.
In an embodiment of the present invention, the first schedule controller a4 may obtain the control schedule of the steam boiler Y3 based on the output A1O of the steam pipe network pressure controller A1. Wherein the control component of the steam boiler Y3, i.e. the output A4O of the first process controller A4, may be in a linear relationship with its input (A1O). For example, A4O ═ A1O + b; wherein a is a linear coefficient and b is a constant. According to the linear relationship, when A1O satisfies a 50-100% change condition, A4O satisfies a 0% -Fbe-100% -Fbe change range, where Fbe is the rated steam flow rate of the steam boiler Y3.
In the embodiment of the present invention, the output A4O of the first thread controller A4 and the input (A1O) thereof include, but are not limited to, a linear relationship, and the input-output relationship thereof may be self-defined according to a specific application scenario.
In an embodiment of the present invention, the second branch controller a5 may obtain a control component of the thermal storage device Y4 from the output A1O of the steam pipe network pressure controller A1. Wherein the control component of the thermal storage device Y4 (i.e. the output A5O of the second shunt controller A5) may be linear with its input (A1O). For example, A5O ═ c A1O + d; wherein c is a linear coefficient and d is a constant. According to this linear relationship, when A1O satisfies a change condition of 0 to 50%, A5O satisfies a change range of 100% Fse to 0% Fse, which is the rated steam flow rate of the heat storage device Y4.
In the embodiment of the present invention, the output A5O of the second thread controller A5 has a linear relationship with its input (A1O), which may be self-defined according to the specific application scenario.
And the first control module 13 is used for controlling the steam boiler and the heat storage device according to the control components of the steam boiler and the heat storage device respectively.
Alternatively, the first control module 13 may include:
a first controller a6 connected to the first sub-controller a4, for controlling the steam boiler Y3 according to the steam flow generated by the steam boiler Y3 and the feedback;
and a second controller a7 connected to the second sub-controller a5, for controlling the thermal storage device Y4 based on the control component of the thermal storage device Y4 and the flow rate of the thermal storage steam of the thermal storage device obtained by feedback.
In an embodiment of the present invention, the output A4O of the first schedule controller A4 is a given input to the first controller a6 (i.e., the boiler load controller), the boiler steam flow Fb is a measured input to the first controller a6, and the first controller a6 may operate the given input A4O and the measured input Fb using a predetermined algorithm, such as a PID algorithm, to obtain a control algorithm for the steam boiler Y3. The output A6O of the first controller A6 may be connected to a gas regulating valve VFb of a steam boiler Y3, and control of the steam boiler Y3 is achieved by control of VFb.
In an embodiment of the present invention, the output A5O of the second branch controller A5 is a given input to the second controller a7 (i.e., the thermal storage device controller), the thermal storage device flow rate Fs is a measured input to the second controller a7, and the second controller a7 may operate on the given input A5O and the measured input Fs using a predetermined algorithm, such as a PID algorithm, to obtain a control algorithm for the thermal storage device Y4. The output A7O of the second controller A7 may be connected to the vapor regulating valve VFs of the thermal storage device Y4, and control of the thermal storage device Y4 may be achieved through control of VFs.
In the embodiment of the present invention, the preset algorithm includes, but is not limited to, a PID algorithm, and the control algorithm may be defined according to a specific application scenario.
Alternatively, as shown in fig. 4 and 5, the second control unit 2 may include: the second acquisition module 21 and the second processing module 22 are connected in sequence;
the second acquisition module 21 is used for acquiring second energy data of the steam equipment; the steaming device includes: a waste heat steam boiler, a steam boiler and a heat storage device;
optionally, the second energy data may include, but is not limited to: a steam flow rate Fchp of the waste heat steam boiler, a steam flow rate Fb generated by the steam boiler, and a heat storage steam flow rate Fs of the heat storage device.
In the embodiment of the invention, corresponding data acquisition devices can be arranged at steam devices such as a waste heat steam boiler, a heat storage device and the like in advance respectively so as to acquire energy data of each steam device. The specific collection devices and equipment are not limited and may include, for example, a flow meter.
And the second processing module 22 is used for calculating the control quantity of the generator set according to the acquired energy data and controlling the generator set according to the control quantity of the generator set.
Optionally, the second processing module 22 may include:
and a second calculator B1 for calculating the total output steam flow rate from the heat recovery steam boiler steam flow rate Fchp, the steam flow rate Fb generated by the steam boiler Y3, and the heat storage steam flow rate Fs of the heat storage device.
A third calculator B2 for calculating a second control amount according to the output total steam flow and a preset second algorithm;
and the signal selector S2 is used for acquiring the control quantity of the generator set Y1 according to the calculated second control quantity, the feedback signal of the signal selector S2 and the switching value signal, and controlling the generator set according to the control quantity of the generator set.
In the embodiment of the present invention, the flow rate Fchp of the heat recovery steam boiler, the flow rate Fb of the steam boiler, and the flow rate Fs of the heat storage steam of the heat storage device Y4 are respectively used as input 1, input 2, and input 3 of the second calculator B1, and the algorithm of the second calculator B1 for the input 1, input 2, and input 3 may include a summation operation, for example, the output B1O of the second calculator B1 may be: B1O ═ Fchp + Fb-Fs.
In an embodiment of the present invention, the output B1O of the second calculator B1 is an input of the third calculator B2, and the output B2O of the third calculator B2 may be linear with its input (i.e., the output B1O of the second calculator B1). For example, B2O ═ e × C1O + f; wherein e is a linear coefficient and f is a constant. According to the linear relation, when the B1O meets the change condition of 0% -Fchpe-100% -Fchpe, the corresponding B2O meets the change range of 0% -Pee-100% -Pee, wherein the Fchpe is the rated steam flow of the waste heat steam boiler, and the Pee is the power of the generator set.
In the embodiment of the present invention, the output B2O of the third calculator B2 and the input (B1O) thereof include, but are not limited to, a linear relationship, and the input-output relationship thereof can be self-defined according to a specific application scenario.
In the embodiment of the present invention, the output B2O of the third calculator B2 and the output Pesp of the signal selector S2 are input 1 and input 2 of the signal selector S2, respectively. The signal selector S2 may also include inputs 3, such as a switching value signal Stc; when the preset time tc (for example, tc is 600 seconds), the state of Stc is ON, and is automatically reset to OFF at the next time, when the state of Stc is ON, the output of the signal selector S2 is the input 1 of the signal selector S2, otherwise, the output of the signal selector S2 is the input 2 of the signal selector S2. The output Pesp of S2 is used as the control variable of the generator set Y1.
In the embodiment of the present invention, the preset second algorithm may include, but is not limited to, the above-mentioned switch control algorithm, and may be defined by itself according to different application scenarios, and the specific algorithm is not limited, and any algorithm capable of obtaining the control quantity of the generator set Y1 is within the protection scope of the embodiment of the present invention.
In the embodiment of the invention, the signal selector S2 may be directly connected to the generator set, and the output pepp of the signal selector S2 is directly used for the load instruction of the generator set to act on the generator set, so as to implement the control of the generator set.
The embodiment of the invention also provides a distributed energy cogeneration control method, which comprises the following steps:
collecting steam pressure of a steam pipe network of an energy user, processing the steam pressure to respectively generate control components of a steam boiler and a heat storage device, and respectively controlling the steam boiler and the heat storage device according to the control components; and the number of the first and second groups,
collecting energy data of steam equipment, processing the energy data to generate a control quantity of a generator set, and controlling the generator set according to the control quantity of the generator set;
the steam pipe network is used for providing steam energy for energy users; the steam boiler is used for generating steam energy through fuel gas; the generator set is used for generating electricity through gas; the heat storage device is used for storing redundant steam energy when the steam energy generated by the steam boiler and the waste heat steam boiler is excessive.
An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the distributed energy cogeneration control method described above.
The embodiment of the invention comprises the following steps: the first control unit is used for collecting the steam pressure of a steam pipe network of an energy user, processing the steam pressure to respectively generate control components of the steam boiler and the heat storage device, and respectively controlling the steam boiler and the heat storage device according to the control components; the second control unit is used for acquiring energy data of the steam equipment, processing the energy data to generate a control quantity of the generator set and controlling the generator set according to the control quantity of the generator set; the steam pipe network is used for providing steam energy for energy users; the steam boiler is used for generating steam energy through fuel gas; the generator set is used for generating electricity through gas; the heat storage device is used for storing redundant steam energy when the steam energy generated by the steam boiler and the waste heat steam boiler is excessive. Through the scheme of the embodiment, the operation modes of all the units are coordinated according to the load change, the system can meet the requirements of different working conditions, and the safe, stable and efficient operation is realized.
The embodiment of the invention at least comprises the following advantages:
1. the distributed energy cogeneration control system adopts a split-range control strategy to carry out closed-loop control on the boiler load and the heat storage device, can effectively establish the thermodynamic balance of the system, meets the requirement of heat load, can collect redundant heat through energy storage, and avoids the waste of energy;
2. the distributed energy cogeneration control system regularly adjusts the load of the generator set according to the steam flow of the waste heat steam boiler, the steam flow of the gas boiler and the steam flow of the heat storage device, realizes the control of electricity by heat, not only meets the cooperative requirement of multi-energy production, but also improves the safety and stability of the operation of the generator set by reducing the adjustment frequency of the generator set.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the embodiments of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the embodiments of the invention as defined by the appended claims.
Claims (8)
1. A distributed energy cogeneration control system, said system comprising: a first control unit and a second control unit;
the first control unit is used for collecting steam pressure of a steam pipe network of an energy user, processing the steam pressure to generate control components of a steam boiler and a heat storage device respectively, and controlling the steam boiler and the heat storage device respectively according to the control components;
the second control unit is used for acquiring energy data of the steam equipment, processing the energy data to generate a control quantity of the generator set, and controlling the generator set according to the control quantity of the generator set;
wherein the steam pipe network is used for providing steam energy for the energy user; the steam boiler is used for generating the steam energy through fuel gas; the generator set is used for generating electricity through gas; the heat storage device is used for storing redundant steam energy when the steam energy generated by the steam boiler and the waste heat steam boiler is excessive;
the steaming device includes: the waste heat steam boiler, the steam boiler and the heat storage device; the waste heat steam boiler is used for generating the steam energy according to the smoke generated by the generator set;
the energy data includes: the waste heat steam boiler comprises a waste heat steam boiler steam flow, a steam flow generated by the steam boiler and a heat storage steam flow of the heat storage device.
2. A distributed energy cogeneration control system according to claim 1, wherein said first control unit comprises: the system comprises a first acquisition module, a first processing module and a first control module which are connected in sequence;
the first acquisition module is used for acquiring the steam pressure of the steam pipe network;
the first processing module is used for calculating the control component of the steam boiler and the control component of the heat storage device according to the steam pressure of the steam pipe network;
the first control module is used for controlling the steam boiler and the heat storage device according to the control components of the steam boiler and the heat storage device respectively.
3. The distributed energy cogeneration control system of claim 2, wherein said first processing module comprises:
the steam pipe network pressure controller is used for calculating a feedback control component of the steam pressure of the steam pipe network;
a first branch controller for obtaining a control component of the steam boiler according to the feedback control component of the steam pressure;
and a second sub-controller for obtaining a control component of the heat storage device based on the feedback control component of the steam pressure.
4. A distributed energy cogeneration control system according to claim 3, wherein said first control module comprises:
the first controller is connected with the first branch controller and is used for controlling the steam boiler according to the control component of the steam boiler and the steam flow generated by the steam boiler obtained by feedback;
and the second controller is connected with the second sub-controller and is used for controlling the heat storage device according to the control component of the heat storage device and the heat storage steam flow of the heat storage device obtained by feedback.
5. A distributed energy cogeneration control system according to claim 1, wherein said second control unit comprises: the second acquisition module and the second processing module are sequentially connected;
the second acquisition module is used for acquiring energy data of the steam equipment;
and the second processing module is used for calculating the control quantity of the generator set according to the acquired energy data and controlling the generator set according to the control quantity of the generator set.
6. A distributed energy cogeneration control system according to claim 5, wherein said second processing module comprises:
the second calculator is used for calculating the total output steam flow according to the steam flow of the waste heat steam boiler, the steam flow generated by the steam boiler and the heat storage steam flow of the heat storage device;
the third calculator is used for calculating a second control quantity according to the output total steam flow and a preset second algorithm;
and the signal selector is used for acquiring the control quantity of the generator set according to the calculated second control quantity, the feedback signal of the signal selector and the switching value signal and controlling the generator set according to the control quantity of the generator set.
7. A distributed energy cogeneration control method, the method comprising:
collecting steam pressure of a steam pipe network of an energy user, processing the steam pressure to respectively generate control components of a steam boiler and a heat storage device, and respectively controlling the steam boiler and the heat storage device according to the control components; and the number of the first and second groups,
acquiring energy data of steam equipment, processing the energy data to generate a control quantity of a generator set, and controlling the generator set according to the control quantity of the generator set;
wherein the steam pipe network is used for providing steam energy for the energy user; the steam boiler is used for generating the steam energy through fuel gas; the generator set is used for generating electricity through gas; the heat storage device is used for storing redundant steam energy when the steam energy generated by the steam boiler and the waste heat steam boiler is excessive;
the steaming device includes: the waste heat steam boiler, the steam boiler and the heat storage device; the waste heat steam boiler is used for generating the steam energy according to the smoke generated by the generator set;
the energy data includes: the waste heat steam boiler comprises a waste heat steam boiler steam flow, a steam flow generated by the steam boiler and a heat storage steam flow of the heat storage device.
8. The distributed energy cogeneration control method of claim 7,
the processing the steam pressure to generate control components for the steam boiler and the thermal storage device, respectively, comprises: calculating a feedback control component of the steam pressure of the steam pipe network; acquiring a control component of the steam boiler and a control component of the heat storage device according to the feedback control component of the steam pressure;
the processing the energy data to generate a control quantity of the generator set comprises:
calculating the total output steam flow according to the steam flow of the waste heat steam boiler, the steam flow generated by the steam boiler and the heat storage steam flow of the heat storage device; calculating a second control quantity according to the output total steam flow and a preset second algorithm; and acquiring the control quantity of the generator set according to the calculated second control quantity, the feedback signal of the signal selector and the switching value signal.
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