CN110797864A - Electric power adjusting method for cogeneration unit containing electric boiler - Google Patents
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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
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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
- F24D12/00—Other central heating systems
- F24D12/02—Other central heating systems having more than one heat source
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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
- F24D13/00—Electric heating systems
- F24D13/04—Electric heating systems using electric heating of heat-transfer fluid in separate units of the system
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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
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
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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
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
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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
- F24D2200/00—Heat sources or energy sources
- F24D2200/32—Heat sources or energy sources involving multiple heat sources in combination or as alternative heat sources
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The adjusting method aims at the problem that the operation mode of the cogeneration unit with the electricity determined by heat limits the electric power adjustment, changes the working characteristics of the cogeneration system by adding the electric boiler, solves the coupling relation of the traditional cogeneration system to a certain degree, improves the load adjusting capacity of a power grid, and is beneficial to the absorption capacity of the power grid on new energy such as wind power and the like. The electric power adjusting method solves the problem of insufficient peak shaving capacity of the system due to the fact that the input of the heat supply season cogeneration unit extrudes the capacity of new energy resources such as wind power and the like on the internet. Therefore, the invention is significant.
Description
Technical Field
The invention relates to the field of comprehensive energy, in particular to the field of cogeneration, and particularly relates to an electric power adjusting method for a cogeneration unit with an electric boiler.
Background
In order to solve the problems of shortage of fossil resources and environmental pollution caused by coal burning and the like, renewable energy sources such as wind power and the like which are developed to be clean and environment-friendly are inevitable choices in China and other countries in the world.
In order to realize the energy strategy of low carbon, environmental protection, green and sustainable development, renewable energy is vigorously developed in China in recent years, a series of standards and policies are provided for the renewable energy, and the renewable energy is greatly developed, particularly in the field of development and utilization of wind power energy. By the end of 6 months in 2019, the installed capacity of China reaches 193 GW.
At present, wind power and photovoltaic installation are mainly concentrated in the three-north area (northeast, northwest and north China), account for 77 percent and 68 percent of the proportion of the whole country, and are mainly developed in a large scale. The power supply structure in the 'three north' area mainly uses coal power, and the specific gravity of the coal-fired thermoelectric power unit is as high as 56%. One effective solution to developing efficient systems is the mature cogeneration technology. Cogeneration comprises the generation of electricity by a plurality of engines, all coupled in one system, or simultaneously generating electricity and heating, i.e. cogeneration, can be further extended to include cooling for power generation, i.e. combined cooling, cogeneration systems being a very promising technology, which can effectively reduce fuel consumption and greenhouse gas emissions. However, in order to supply heat in winter, the cogeneration unit operates in a "hot set power generation" mode, and the output power of the cogeneration unit cannot be reduced, so that the peak shaving capacity of the system is insufficient, and the overall regulation capacity of the power grid is poor.
The heat supply unit operates in the heating period in winter in the north, so that the peak regulation capacity of the system is seriously insufficient, the large-scale wind power and photovoltaic power generation absorption requirements cannot be met, and the phenomena of wind abandonment and light abandonment are serious.
The method for improving the comprehensive utilization efficiency of energy and reducing the phenomena of wind and light abandonment is a lot of, but the investment cost is high, and the method which is more economical and practical is to research and utilize a Combined Heat and Power (CHP) unit to improve the comprehensive efficiency of energy and simultaneously improve the absorption capacity of new energy such as wind power, photovoltaic and the like. Therefore, the method has important practical significance and practical application value.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an electric power adjusting method for a cogeneration unit including an electric boiler, which solves the problem of limitation on electric power adjustment by an operation mode of the cogeneration unit that "fixes the power by heat", changes the operating characteristics of the cogeneration system by adding the electric boiler, and releases the coupling relationship of the previous "fixes the power by heat" to a certain extent, thereby improving the load adjusting capability of the power grid and contributing to the capability of the power grid to absorb new energy such as wind power and the like. Therefore, the above problems can be effectively solved.
The technical solution of the invention is as follows:
the electric power regulating method of the cogeneration unit with the distribution boiler is characterized by comprising a controller with a first communication port, a second communication port, a third communication port, a fourth communication port, a fifth communication port, a sixth communication port, a seventh communication port and a control unit;
the new energy power generation signal input end of the first communication port is connected with the communication output end of new energy power generation, and the new energy power generation signal output end of the first communication port is connected with the new energy power generation signal input end of the control unit;
the power plant signal input end of the second communication port is connected with the communication output end of the power plant, and the power plant signal output end of the second communication port is connected with the power plant signal input end of the control unit;
the signal input end of the cogeneration power plant of the third communication port is connected with the communication output end of the cogeneration power plant, and the signal output end of the cogeneration power plant of the third communication port is connected with the signal input end of the cogeneration power plant of the control unit;
the electric boiler signal input end of the fourth communication port is connected with the communication output end of the electric boiler, and the electric boiler signal output end of the fourth communication port is connected with the electric boiler signal input end of the control unit;
the battery energy storage signal input end of the fifth communication port is connected with the battery energy storage communication output end, and the battery energy storage signal output end of the fifth communication port is connected with the battery energy storage signal input end of the control unit;
the industrial signal input end of the sixth communication port is connected with the industrial communication output end, and the industrial signal output end of the sixth communication port is connected with the industrial signal input end of the control unit;
the electrical load signal input end of the seventh communication port is connected with the communication output end of the electrical load, and the electrical load signal output end of the seventh communication port is connected with the electrical load signal input end of the control unit;
setting Combined Heat and Power (CHP) maximum output P of heat powerh_maxThe maximum heat release power of the electric boiler is Phs1Maximum endothermic power of Phs2；
The control unit for realizing the electric power regulation of the cogeneration unit comprises the following steps:
step 1, available adjusting range of CHP electric power of non-power distribution boiler
The CHP can be used for outputting electric power with the regulation range of (P)e_N_min,Pe_N_max)；
Step 2, CHP electric power available adjusting range of distribution boiler
Setting the electric-heat conversion ratio of the electric boiler as p1Maximum output thermal power of PtThe electric power which can be regulated by the cogeneration system is (P)e_N_min2,Pe_N_max2)；
Pe_N_min2＝Pe_N_min-Pt/p1(1)
Pe_N_max2＝Pe_N_max(2)
Step 3, adjusting output power of the CHP unit
Adjusting the output power P of the CHP unit according to the following formulaH：
PH＝PI+PL+PB-(PW+PT+PE) (3)
Wherein, PIFor industrial electric power, PLFor electrical power of electrical loads, PBFor electric power for electric boilers, PWGenerating power for new energy, PTFor generating power in power plants, PEStoring energy and outputting power for the battery;
the electric power regulation range of the calculated cogeneration unit is improved by η compared with the electric power regulation range when the electric boiler is not configureds2I.e. by
Step 4, controller output
Step 41, adjusting the battery energy storage output power PE
The controller outputs a battery energy storage regulation command P according to the following regulation model (4)E：
PE＝PI+PL+PB-(PW+PT+PH) (4)
Step 42, adjusting the output power P of the new energyW
According to the following regulation model (5), the controller outputs a regulation new energy power command PW：
PW＝PI+PL+PB-(PE+PT+PH) (5)
Compared with the prior art, the invention has the following characteristics:
experiments show that aiming at the problem that the operation mode of the cogeneration unit with the fixed heat power limits the electric power regulation, the electric power regulation method of the cogeneration unit with the distribution boiler changes the working characteristics of the cogeneration system by adding the electric boiler, relieves the coupling relation of the conventional fixed heat power to a certain extent, improves the load regulation capacity of a power grid, and is beneficial to the absorption capacity of the power grid on new energy such as wind power and the like. The electric power adjusting method solves the problem of insufficient peak shaving capacity of the system due to the fact that the input of the heat supply season cogeneration unit extrudes the capacity of new energy resources such as wind power and the like on the internet.
Drawings
Fig. 1 is a schematic diagram of an electric power controller of a cogeneration unit including a distribution boiler according to the present invention.
FIG. 2 is a comparison of the electrical heating performance of the steam extraction unit of the electric boiler.
Detailed Description
The present invention will be further described with reference to the following examples and drawings, but the scope of the present invention should not be limited thereto.
Referring to fig. 1, fig. 1 is a schematic diagram of an electric power controller of a cogeneration unit including a distribution boiler according to the present invention. As can be seen from the figure, the electric power adjusting method of the cogeneration unit with the distribution boiler is characterized by comprising a controller with a first communication port 1, a second communication port 2, a third communication port 3, a fourth communication port 4, a fifth communication port 5, a sixth communication port 6, a seventh communication port 7 and a control unit 8;
the new energy power generation signal input end of the first communication port 1 is connected with the communication output end of new energy power generation, and the new energy power generation signal output end of the first communication port 1 is connected with the new energy power generation signal input end of the control unit 8;
the power plant signal input end of the second communication port 2 is connected with the communication output end of a power plant, and the power plant signal output end of the second communication port 2 is connected with the power plant signal input end of the control unit 8;
a cogeneration power plant signal input end of the third communication port 3 is connected with a communication output end of the cogeneration power plant, and a cogeneration power plant signal output end of the third communication port 3 is connected with a cogeneration power plant signal input end of the control unit 8;
the electric boiler signal input end of the fourth communication port 4 is connected with the communication output end of the electric boiler, and the electric boiler signal output end of the fourth communication port 4 is connected with the electric boiler signal input end of the control unit 8;
the battery energy storage signal input end of the fifth communication port 5 is connected with the battery energy storage communication output end, and the battery energy storage signal output end of the fifth communication port 5 is connected with the battery energy storage signal input end of the control unit 8;
the industrial signal input end of the sixth communication port 6 is connected with the industrial communication output end, and the industrial signal output end of the sixth communication port 6 is connected with the industrial signal input end of the control unit 8;
an electrical load signal input end of the seventh communication port 7 is connected with a communication output end of an electrical load, and an electrical load signal output end of the seventh communication port 7 is connected with an electrical load signal input end of the control unit 8;
setting Combined Heat and Power (CHP) maximum output P of heat powerh_maxThe maximum heat release power of the electric boiler is Phs1Maximum endothermic power of Phs2；
The control unit 8 for regulating the electric power of the cogeneration unit comprises the following steps:
step 1, available adjusting range of CHP electric power of non-power distribution boiler
The CHP can be used for outputting electric power with the regulation range of (P)e_N_min,Pe_N_max)；
Step 2, CHP electric power available adjusting range of distribution boiler
Electric heating with electric boilerConversion ratio of p1Maximum output thermal power of PtThe electric power which can be regulated by the cogeneration system is (P)e_N_min2,Pe_N_max2)；
Pe_N_min2＝Pe_N_min-Pt/p1(1)
Pe_N_max2＝Pe_N_max(2)
Step 3, adjusting output power of the CHP unit
Adjusting the output power P of the CHP unit according to the following formulaH：
PH＝PI+PL+PB-(PW+PT+PE) (3)
Wherein, PIFor industrial electric power, PLFor electrical power of electrical loads, PBFor electric power for electric boilers, PWGenerating power for new energy, PTFor generating power in power plants, PEStoring energy and outputting power for the battery;
the electric power regulation range of the calculated cogeneration unit is improved by η compared with the electric power regulation range when the electric boiler is not configureds2I.e. by
Step 4, controller output
Step 41, adjusting the battery energy storage output power PE
The controller outputs a battery energy storage regulation command P according to the following regulation model (4)E：
PE＝PI+PL+PB-(PW+PT+PH) (4)
Step 42, adjusting the output power P of the new energyW
According to the following regulation model (5), the controller outputs a regulation new energy power command PW：
PW＝PI+PL+PB-(PE+PT+PH) (5)
Figure 2 shows a comparison of the electrical heating behaviour of a steam extraction unit with an electric boiler and without an electric boiler.
The electric heating operating characteristics of the steam extraction unit without the electric boiler are the ACGM area in FIG. 2. Wherein, when the unit is in the A point state, the electric power reaches the maximum output Pe_max(ii) a When the unit is in the G point state, the electric power reaches the minimum output Pe_min. When the unit is in the C point state, the thermal power reaches the maximum output Ph_max. Under the working condition of the maximum condensation capacity of the AC section, the output electric heating characteristic of the unit is the slope c1The line segment of (2). Under the working condition of the minimum gas condensation amount of the CG section, the output electric heating characteristic of the unit is that the slope is c2The line segment of (2).
Setting the electric-heat conversion ratio of the electric boiler as p1Maximum output thermal power of PtThe electric boiler is arranged near the cogeneration unit, and the operating characteristics of the cogeneration unit with the electric boiler are the ACEJLM region in FIG. 2 by neglecting the loss of the medium in the pipeline transmission process. If the system is in the N-point state, the heat output power of the electric boiler is PtWhen the power is not enough, the power of the cogeneration system is adjusted to be (P)e_N_min2,Pe_N_max2)。
Obviously, after the electric boiler is configured, the adjustable minimum value of the output electric power is reduced when the heat and power cogeneration system integrally outputs a certain heat power, so that the capacity of the power grid for accepting new energy is improved, and the wind power available for surfing the internet is improveds2. Namely:
experiments show that aiming at the problem that the operation mode of the cogeneration unit with the fixed heat power limits the electric power regulation, the electric power regulation method of the cogeneration unit with the distribution boiler changes the working characteristics of the cogeneration system by adding the electric boiler, relieves the coupling relation of the conventional fixed heat power to a certain extent, improves the load regulation capacity of a power grid, and is beneficial to the absorption capacity of the power grid on new energy such as wind power and the like. The electric power adjusting method solves the problem of insufficient peak shaving capacity of the system due to the fact that the input of the heat supply season cogeneration unit extrudes the capacity of new energy resources such as wind power and the like on the internet.
Claims (1)
1. An electric power adjusting method of a cogeneration unit with a distribution boiler comprises a controller which is provided with a first communication port (1), a second communication port (2), a third communication port (3), a fourth communication port (4), a fifth communication port (5), a sixth communication port (6), a seventh communication port (7) and a control unit (8);
the new energy power generation signal input end of the first communication port (1) is connected with the communication output end of new energy power generation, and the new energy power generation signal output end of the first communication port (1) is connected with the new energy power generation signal input end of the control unit (8);
the power plant signal input end of the second communication port (2) is connected with the communication output end of a power plant, and the power plant signal output end of the second communication port (2) is connected with the power plant signal input end of the control unit (8);
the signal input end of the cogeneration power plant of the third communication port (3) is connected with the communication output end of the cogeneration power plant, and the signal output end of the cogeneration power plant of the third communication port (3) is connected with the signal input end of the cogeneration power plant of the control unit (8);
the electric boiler signal input end of the fourth communication port (4) is connected with the communication output end of the electric boiler, and the electric boiler signal output end of the fourth communication port (4) is connected with the electric boiler signal input end of the control unit (8);
the battery energy storage signal input end of the fifth communication port (5) is connected with the battery energy storage communication output end, and the battery energy storage signal output end of the fifth communication port (5) is connected with the battery energy storage signal input end of the control unit (8);
the industrial signal input end of the sixth communication port (6) is connected with the industrial communication output end, and the industrial signal output end of the sixth communication port (6) is connected with the industrial signal input end of the control unit (8);
the electrical load signal input end of the seventh communication port (7) is connected with the communication output end of an electrical load, and the electrical load signal output end of the seventh communication port (7) is connected with the electrical load signal input end of the control unit (8);
setting the maximum thermal power output P of a combined heat and power generation unit (hereinafter referred to as CHP unit)h_maxThe maximum heat release power of the electric boiler is Phs1Maximum endothermic power of Phs2(ii) a The method is characterized in that the control unit (8) realizes the electric power regulation of the combined heat and power generation unit and comprises the following steps:
step 1, available adjusting range of CHP electric power of non-power distribution boiler
The CHP can be used for outputting electric power with the regulation range of (P)e_N_min,Pe_N_max)；
Step 2, CHP electric power available adjusting range of distribution boiler
Setting the electric-heat conversion ratio of the electric boiler as p1Maximum output thermal power of PtThe electric power which can be regulated by the cogeneration system is (P)e_N_min2,Pe_N_max2)；
Pe_N_min2＝Pe_N_min-Pt/p1(1)
Pe_N_max2＝Pe_N_max(2)
Step 3, adjusting output power P of CHP unitHThe formula is as follows:
PH＝PI+PL+PB-(PW+PT+PE) (3)
wherein, PIFor industrial electric power, PLFor electrical power of electrical loads, PBFor electric power for electric boilers, PWGenerating power for new energy, PTFor generating power in power plants, PEStoring energy and outputting power for the battery;
the electric power regulation range of the calculated cogeneration unit is improved by η compared with the electric power regulation range when the electric boiler is not configureds2I.e. by
Step 4, controller output
Step 41, adjusting the battery energy storage output power PEThe formula is as follows:
PE＝PI+PL+PB-(PW+PT+PH) (4)
step 42, adjusting the output power P of the new energyWThe formula is as follows:
PW＝PI+PL+PB-(PE+PT+PH) (5)。
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2019
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