CN115217560A - Heat supply network auxiliary peak regulation system and method - Google Patents
Heat supply network auxiliary peak regulation system and method Download PDFInfo
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- CN115217560A CN115217560A CN202210802090.0A CN202210802090A CN115217560A CN 115217560 A CN115217560 A CN 115217560A CN 202210802090 A CN202210802090 A CN 202210802090A CN 115217560 A CN115217560 A CN 115217560A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/02—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of multiple-expansion type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
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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
- F24D1/04—Steam central heating systems operating with exhaust 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
- F24D1/06—Steam central heating systems operating with superheated 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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- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The application provides a heat supply network auxiliary peak regulation system and method, and relates to the field of peak regulation of operation of cogeneration power plants. Wherein: a high-pressure bypass to cold re-heating pipeline is connected in front of a high-pressure bypass valve of the high-pressure bypass pipeline, the tail end of the high-pressure bypass to cold re-heating pipeline is connected to a cold re-heating steam extraction pipeline behind the cold re-steam extraction heat supply regulating valve, and the high-pressure bypass to cold re-heating regulating valve is mounted on the high-pressure bypass to cold re-heating pipeline; the low-pressure bypass pipeline is connected with a low-pressure bypass to cylinder-separating pipeline, the tail end of the low-pressure bypass to cylinder-separating pipeline is connected to the heat supply cylinder-separating cylinder, and a low-pressure bypass to cylinder-separating heat supply adjusting valve is mounted on the low-pressure bypass to cylinder-separating pipeline; the heat supply branch cylinder is connected with a heat supply network pipeline, the tail end of the heat supply network pipeline is connected to a second heat supply user, and a heat supply regulating valve of the branch cylinder is installed on the heat supply network pipeline. The scheme can improve the peak regulation capacity of the cogeneration unit.
Description
Technical Field
The application relates to the field of peak shaving in operation of cogeneration power plants, in particular to a system and a method for assisting peak shaving in a heat supply network.
Background
With the implementation of the "dual carbon" target, the new energy power generation market share is increasing, so that the power resource supply is cleaner and is lower in carbonization. However, although wind power and photovoltaic power have been developed rapidly, the generated power has features such as randomness and volatility. Although the traditional thermal power generation power output has the characteristics of sustainability, stability and the like, in order to be matched with new energy power generation, higher requirements are put forward on peak shaving of the power market. As a combined heat and power generation unit, in order to guarantee the steam consumption of heat users, the load variation range is small in the peak regulation process, so that the share of the combined heat and power generation unit in the peak regulation market is small.
Disclosure of Invention
In order to solve the above problems, the present application provides a heat supply network auxiliary peak shaving system and method.
According to the first aspect of this application, a peak shaving system is assisted to heat supply network is provided, the system includes high pressure cylinder, intermediate pressure cylinder, low pressure cylinder, condenser, heat supply branch cylinder and auxiliary steam header, wherein:
the inlet end of the high-pressure cylinder is connected with a superheated steam pipeline, and the steam exhaust end of the high-pressure cylinder is connected with a cold re-steam pipeline; the cold re-steam pipeline is connected with the cold re-heat supply steam extraction pipeline, a cold re-steam extraction heat supply regulating valve is mounted on the cold re-heat supply steam extraction pipeline, and the tail end of the cold re-heat supply steam extraction pipeline is connected to a first heat supply user;
a high-pressure bypass to cold re-heating pipeline is connected in front of a high-pressure bypass valve of the high-pressure bypass pipeline, the tail end of the high-pressure bypass to cold re-heating pipeline is connected to the cold re-heating steam extraction pipeline behind the cold re-steam extraction heat supply regulating valve, and the high-pressure bypass to cold re-heating steam extraction pipeline is provided with a high-pressure bypass to cold re-heating regulating valve;
the inlet end of the intermediate pressure cylinder is connected with a hot re-steam pipeline, the steam extraction port of the intermediate pressure cylinder is connected with an industrial steam extraction pipeline, and the tail end of the industrial steam extraction pipeline is connected with the heat supply branch cylinder; an industrial steam extraction regulating valve is arranged on the industrial steam extraction pipeline;
the low-pressure bypass pipeline is connected with a low-pressure bypass to cylinder-dividing pipeline, the tail end of the low-pressure bypass to cylinder-dividing pipeline is connected to the heat supply cylinder-dividing pipe, and a low-pressure bypass to cylinder-dividing heat supply adjusting valve is mounted on the low-pressure bypass to cylinder-dividing pipeline; the heat supply branch cylinder is connected with a heat supply network pipeline, the tail end of the heat supply network pipeline is connected to a second heat supply user, and a branch cylinder heat supply adjusting valve is installed on the heat supply network pipeline.
In some embodiments of the present application, an industrial steam extraction to auxiliary steam pipeline and an industrial steam extraction to water feeding pump turbine pipeline are both connected to the industrial steam extraction pipeline in front of the industrial steam extraction regulating valve, the end of the industrial steam extraction to auxiliary steam pipeline is connected to the auxiliary steam header, and the industrial steam extraction to auxiliary steam pipeline is provided with an industrial steam extraction to auxiliary steam regulating valve; the tail end of the industrial steam extraction to water supply pump turbine pipeline is connected to a water supply pump turbine, and an industrial steam extraction to water supply pump turbine regulating valve is mounted on the industrial steam extraction to water supply pump turbine pipeline; the auxiliary steam header is connected with auxiliary steam to a water feed pump turbine pipeline, the end of the auxiliary steam to the water feed pump turbine pipeline is connected to the industrial steam extraction to the water feed pump turbine pipeline after the valve is adjusted to the water feed pump turbine, and the auxiliary steam is installed on the auxiliary steam to the water feed pump turbine pipeline and is adjusted to the water feed pump turbine.
As a possible implementation, the cold re-steam pipeline is connected with a cold re-auxiliary steam pipeline, the cold re-auxiliary steam pipeline is connected to the auxiliary steam header at the end, and the cold re-auxiliary steam pipeline is provided with a cold re-auxiliary steam adjusting valve.
In some embodiments of the present application, the cold is connected to the auxiliary steam pipeline again to the cold before the auxiliary steam adjusting valve again, the cold is connected to the industrial steam extraction pipeline again to the end of the industrial steam extraction pipeline after the industrial steam extraction adjusting valve, and the cold is installed on the industrial steam extraction pipeline again to the branch cylinder adjusting valve.
In other embodiments of the present application, a high-pressure bypass to cold re-supply pipeline before the high-pressure bypass to cold re-supply heat-adjusting valve is connected with a high-pressure bypass to cylinder-splitting pipeline, the tail end of the high-pressure bypass to cylinder-splitting pipeline is connected to the heat supply cylinder-splitting, and the high-pressure bypass to cylinder-splitting valve is installed on the high-pressure bypass to cylinder-splitting pipeline.
According to a second aspect of the present application, there is provided a heat supply network auxiliary peak shaving method, which is applied to the heat supply network auxiliary peak shaving system of the first aspect, and includes:
under the normal operation condition, opening the cold re-extraction steam-supply heat-supply regulating valve and regulating the opening degree of the cold re-extraction steam-supply heat-supply regulating valve to meet the requirement of the first heat-supply user, and opening the industrial steam-extraction steam-supply regulating valve on the industrial steam-extraction pipeline and regulating the opening degree of the industrial steam-extraction steam-supply heat-supply regulating valve to control the steam parameters of the heat-supply steam-distributing cylinder;
under the peak regulation working condition, if the load of the unit is reduced, the high-pressure bypass to cold re-heating regulating valve is opened and the opening degree of the high-pressure bypass to cold re-heating regulating valve is adjusted to meet the requirement of the first heat supply user, and the low-pressure bypass to the steam distribution cylinder heat supply regulating valve is opened and the opening degree of the low-pressure bypass to the steam distribution cylinder heat supply regulating valve is adjusted to control the steam parameters of the heat supply steam distribution cylinder.
In some embodiments of the present application, the method further comprises:
and under the normal operation condition, opening the industrial extraction steam-to-auxiliary steam regulating valve and the industrial extraction steam-to-feed pump steam turbine regulating valve and respectively regulating the respective opening degrees to regulate steam parameters.
In other embodiments of the present application, the method further comprises:
under the deep peak regulation working condition, closing the cold re-extraction heat supply regulating valve, and increasing the opening of the high-pressure bypass to the cold re-supply heat regulating valve to meet the requirements of the first heat supply user;
increasing the opening degree of the heat supply regulating valve of the low-pressure bypass to the steam-distributing cylinder, opening the cold-secondary-steam regulating valve and regulating the opening degree of the cold-secondary-steam regulating valve to meet the steam parameters of the heat supply steam-distributing cylinder and the auxiliary steam header;
and opening the auxiliary steam to a regulating valve of the water feeding pump turbine and regulating the opening of the regulating valve so as to ensure that the water feeding pump turbine works normally.
In still other embodiments of the present application, the method further comprises:
and under the deep peak regulation working condition, opening the cold secondary cylinder to branch cylinder regulating valve and regulating the opening degree of the cold secondary cylinder to control the steam parameters of the heat supply branch cylinder.
In still other embodiments of the present application, the method further comprises:
and under the deep peak regulation working condition, opening the high-pressure bypass to the branch cylinder regulating valve and regulating the opening degree of the branch cylinder regulating valve so as to reduce the steam inlet amount of the high-pressure cylinder.
According to the technical scheme of the application, the high-pressure bypass to the cold re-heating pipeline and the low-pressure bypass to the steam-distributing cylinder pipeline are added, so that the system can meet the requirements of heat supply users by combining superheated steam and hot re-steam, the load change range under the peak regulation working condition can be enlarged, the steam quantity required by heat supply in the peak regulation process can be ensured, and the peak regulation capacity of the cogeneration unit is improved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a block diagram illustrating a structure of a heat supply network assisted peak shaving system according to an embodiment of the present disclosure;
fig. 2 is a block diagram of another heat supply network auxiliary peak shaving system according to an embodiment of the present disclosure;
fig. 3 is a flowchart of a method for peak shaving assisted by a heat supply network according to an embodiment of the present application;
fig. 4 is a flowchart of another method for peak shaving assisted in a heat supply network according to an embodiment of the present disclosure;
wherein the reference numbers in fig. 1 are as follows:
e101-high pressure cylinder; e102-intermediate pressure cylinder; e103-low pressure cylinder; e104-a condenser; e105-heat supply steam distributing cylinder; e106-auxiliary steam header; p101-a superheated steam pipeline; p102-cold re-steam line; p103-high pressure bypass line; p104-high pressure bypass to cold re-heat supply pipeline; p105-cold resupply heat extraction pipeline; p106-hot re-steam line; p107-low pressure bypass line; p108-low pressure bypass to cylinder manifold; p109-industrial steam extraction pipeline; p110-industrial extraction steam to an auxiliary steam pipeline; p111-industrial extraction of steam to a feed pump turbine pipeline; p112-auxiliary steam is delivered to a steam turbine pipeline of a water feeding pump; p113-heat supply network pipeline; p114-a low-medium pressure communicating pipeline; v101-high pressure bypass valve; v102-cold re-steam extraction heat supply regulating valve; v103-high pressure bypass to cold re-supply heating regulating valve; v104-low pressure by-pass to cylinder heat supply regulating valve; v105-industrial steam extraction regulating valve; v106-industrial extraction of steam to an auxiliary steam adjusting valve; v107-industrial steam extraction to a water supply pump turbine adjusting valve; v108-auxiliary steam to a feed pump turbine regulating valve; v109-cylinder distribution heat supply regulating valve; v110 — low pressure bypass valve; v111-middle and low pressure communicating pipe butterfly valve;
the reference numbers in fig. 2 are as follows:
p201-cooling and then feeding to an auxiliary steam pipeline; p202-cooling and then conveying to an industrial steam extraction pipeline; p203-high pressure bypass to cold re-heat supply pipeline; v201-cooling and then feeding to an auxiliary steam adjusting valve; v202-cooling and then adjusting valves of branch cylinders; v203-high pressure bypass to cylinder split trim.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
It is noted that with the implementation of the "dual carbon" goal, the new energy power generation market share is increasing, making the power resource supply cleaner and less carbonized. However, although wind power and photovoltaic power have been developed rapidly, the generated power has features such as randomness and volatility. Although the traditional thermal power generation power output has the characteristics of sustainability, stability and the like, in order to be matched with new energy power generation, higher requirements are put forward on peak shaving of the power market. As a combined heat and power generation unit, in order to guarantee the steam consumption of heat users, the load variation range is small in the peak regulation process, so that the share of the combined heat and power generation unit in the peak regulation market is small.
In order to solve the above problems, the present application provides a system and a method for assisting peak shaving in a heat supply network.
Fig. 1 is a block diagram of a heat supply network assisted peak shaving system according to an embodiment of the present disclosure. As shown in fig. 1, the system includes: the system comprises a high-pressure cylinder E101, an intermediate-pressure cylinder E102, a low-pressure cylinder E103, a condenser E104, a heat supply steam-distributing cylinder E105 and an auxiliary steam header E106. The inlet end of the high-pressure cylinder E101 is connected with a superheated steam pipeline P101, the exhaust end of the high-pressure cylinder E101 is connected with a cold re-steam pipeline P102, the cold re-steam pipeline P102 is connected with a cold re-heating steam extraction pipeline P105, a cold re-heating steam extraction heat supply adjusting valve V102 is installed on the cold re-heating steam extraction pipeline P105, and the tail end of the cold re-heating steam extraction pipeline P105 is connected to a first heat supply user.
In some embodiments of the present application, a high pressure bypass pipe P103 is connected from the superheated steam pipe P101 to the cold re-steam pipe P102, and a high pressure bypass valve V101 is installed on the high pressure bypass pipe P103. A high-pressure bypass to cold re-heating pipeline P104 is connected in front of the high-pressure bypass valve V101 of the high-pressure bypass pipeline P103, the tail end of the high-pressure bypass to cold re-heating pipeline P104 is connected to a cold re-heating steam extraction pipeline P105 behind the cold re-steam extraction and heat supply regulating valve V102, and the high-pressure bypass to cold re-heating regulating valve V103 is installed on the high-pressure bypass to cold re-heating pipeline P104.
In some embodiments of the present application, the inlet end of the intermediate pressure cylinder E102 is connected to a hot re-steam pipeline P106, the steam extraction port of the intermediate pressure cylinder E102 is connected to an industrial steam extraction pipeline P109, and the end of the industrial steam extraction pipeline P109 is connected to the heat supply steam distribution cylinder E105, and the industrial steam extraction pipeline P109 is installed with an industrial steam extraction regulating valve V105. The exhaust steam of the intermediate pressure cylinder E102 is exhausted to the low pressure cylinder E103 through a medium and low pressure communication pipeline P114, a medium and low pressure communication pipe butterfly valve V111 is installed on the medium and low pressure communication pipeline P114, and the low pressure cylinder E103 exhausts steam to a condenser E104. A low pressure bypass line P107 is connected from the hot reheat line P106 to the condenser E104, and a low pressure bypass valve V110 is installed on the low pressure bypass line P107.
The low-pressure bypass pipeline P107 is connected with a low-pressure bypass to cylinder-dividing pipeline P108, the tail end of the low-pressure bypass to cylinder-dividing pipeline P108 is connected to a heat supply cylinder E105, and a low-pressure bypass to cylinder-dividing heat supply adjusting valve V104 is installed on the low-pressure bypass to cylinder-dividing pipeline P108. The heat supply cylinder E105 is connected with a heat supply network pipeline P113, the tail end of the heat supply network pipeline P113 is connected to a second heat supply user, and a cylinder-separating heat supply adjusting valve V109 is installed on the heat supply network pipeline P113.
As shown in fig. 1, the heat supply network auxiliary peak shaving system according to the embodiment of the present application may further include an industrial extraction steam-to-auxiliary steam pipeline P110 and an industrial extraction steam-to-feedwater pump turbine pipeline P111. An industrial steam extraction to auxiliary steam pipeline P110 and an industrial steam extraction to water feeding pump turbine pipeline P111 are connected with an industrial steam extraction pipeline P109 in front of an industrial steam extraction regulating valve V105, the tail end of the industrial steam extraction to auxiliary steam pipeline P110 is connected to an auxiliary steam header E106, and an industrial steam extraction to auxiliary steam regulating valve V106 is installed on the industrial steam extraction to auxiliary steam pipeline P110. The end of the industrial extraction to feed pump turbine pipeline P111 is connected to the feed pump turbine, and an industrial extraction to feed pump turbine governor valve V107 is installed on the industrial extraction to feed pump turbine pipeline P111. The auxiliary steam header E106 is connected with an auxiliary steam to feed water pump turbine pipeline P112, the tail end of the auxiliary steam to feed water pump turbine pipeline P112 is connected to an industrial steam extraction to feed water pump turbine pipeline P111 after an industrial steam extraction to feed water pump turbine regulating valve V107, and an auxiliary steam to feed water pump turbine regulating valve V108 is installed on the auxiliary steam to feed water pump turbine pipeline P112.
As shown in fig. 1, in the heat supply network peak regulation assisting system, under a normal operation condition, the cold re-extraction heat supply modulating valve V102 may be opened and its opening degree may be adjusted to meet the requirement of the first heat supply user, the steam parameter of the heat supply cylinder E105 may be controlled by opening the industrial extraction modulating valve V105 on the industrial extraction pipeline P109 and adjusting its opening degree, and the steam parameter of the second heat supply user may be adjusted by adjusting the opening degree of the cylinder distribution heat supply modulating valve V109 on the heat supply network pipeline P113. The first heat supply user can be a user needing high steam parameters such as a factory needing heat supply, and the second heat supply user can be a related user such as household collective heating.
In addition, under normal working conditions, in order to meet the normal operation of the auxiliary steam header E106 and the water supply pump turbine, the industrial extraction steam-to-auxiliary steam regulating valve V106 and the industrial extraction steam-to-water supply pump turbine regulating valve V107 can be opened, and the respective opening degrees can be regulated to regulate steam parameters to meet production requirements.
Under the peak regulation working condition, if the load of the unit is reduced, the steam parameters of the unit are reduced, and the cold re-extraction parameters gradually do not meet the requirements of the first heat supply user any more. Meanwhile, the load of the unit is reduced, so that the heat re-steam parameters are reduced, the industrial steam extraction parameters are reduced, the heat supply parameters of the heat supply steam distributing cylinder E105 cannot be met, and at the moment, a low-pressure bypass can be opened to the heat supply regulating valve V104 of the steam distributing cylinder and the opening degree of the heat supply regulating valve V104 can be regulated, so that the steam parameters of the heat supply steam distributing cylinder E105 are stable.
According to the heat supply network auxiliary peak shaving system provided by the embodiment of the application, the high-pressure bypass to the cold re-heating pipeline and the low-pressure bypass to the branch cylinder pipeline are added, so that the system can meet the requirements of heat supply users by combining superheated steam and hot re-steam, the load change range under the peak shaving working condition can be enlarged, the steam quantity required by heat supply in the peak shaving process can be ensured, and the peak shaving capacity of the cogeneration unit is improved.
To further introduce a heat supply network assisted peak shaving system, another embodiment is provided.
Fig. 2 is a block diagram of a structure of another heat supply network assisted peak shaving system according to an embodiment of the present application. As shown in fig. 2, compared to fig. 1 in the above embodiment, the heat supply network auxiliary peak shaving system in the embodiment of the present application adds a cold-to-auxiliary steam pipeline P201, a cold-to-industrial steam extraction pipeline P202, and a high-pressure bypass-to-cold-to-heat-supply pipeline P203, and the remaining connection structure is the same as that in the above embodiment, and is not described again here.
In some embodiments of the present application, the cold re-steam pipe P102 is connected with a cold re-to-auxiliary steam pipe P201, the end of the cold re-to-auxiliary steam pipe P201 is connected to the auxiliary steam header E106, and the cold re-to-auxiliary steam pipe P201 is installed with a cold re-to-auxiliary steam adjusting valve V201.
In addition, the cold-to-auxiliary steam pipeline P201 before the cold-to-auxiliary steam adjusting valve V201 is connected with a cold-to-industrial steam extraction pipeline P202, the end of the cold-to-industrial steam extraction pipeline P202 is connected to the industrial steam extraction pipeline P109 behind the industrial steam extraction adjusting valve V105, and the cold-to-auxiliary steam extraction pipeline P202 is provided with a cold-to-steam distributing cylinder adjusting valve V202.
In some embodiments of the present application, the high pressure bypass to cold resupply pipe P104 before the high pressure bypass to cold resupply regulating valve V103 is connected to the cylinder-separating pipe P203, the end of the high pressure bypass to cylinder-separating pipe P203 is connected to the heating cylinder E105, and the high pressure bypass to cylinder-separating pipe P203 is installed with the high pressure bypass to cylinder-separating regulating valve V203.
Thus, under the deep peak regulation condition, because the steam parameter continuously decreases, the cold re-steam parameter cannot meet the use requirement of the industrial steam extraction and heat users, and because the superheated steam is high-quality steam in the unit thermal cycle process, the opening degree of the cold re-heating and heat-supply adjusting valve V103 from the high-pressure bypass can be gradually increased, the cold re-steam extraction and heat-supply adjusting valve V102 is closed, and the heat supply pipeline of the first heat supply user is switched from the cold re-heating and steam extraction pipeline P105 to the high-pressure bypass to the cold re-heating and steam extraction pipeline P104, so as to meet the heat supply parameter of the first heat supply user. Under the working condition of deep peak regulation, because the hot re-steam parameter entering the intermediate pressure cylinder E102 is reduced, the steam extraction parameter of the industrial steam extraction pipeline is reduced, the steam parameters of the heat supply steam distributing cylinder E105, the auxiliary steam header E106 and the water supply pump steam turbine in normal operation can not be met by using the hot re-steam and the industrial steam extraction, therefore, in the initial stage of deep peak regulation, the opening degree of the low-pressure bypass to the heat supply regulating valve V104 of the steam distributing cylinder can be increased firstly, then the opening degree of the cold re-auxiliary steam regulating valve V201 and the opening degree of the cold re-auxiliary steam regulating valve V202 are opened and adjusted, and the parameter reduction of the auxiliary steam header E106 and the heat supply steam distributing cylinder E105 caused by the reduction of the industrial steam extraction parameter is compensated by using the cold re-steam with higher parameter relative to the industrial steam extraction parameter. Meanwhile, in order to guarantee the normal operation of the feed pump turbine, auxiliary steam is opened to a feed pump turbine regulating valve V108, and the auxiliary steam is utilized to meet the requirement of the normal operation of the feed pump turbine.
In order to further achieve the purpose of deep peak regulation, the heat storage function of the heat supply cylinder E105 is utilized, the high-pressure bypass is opened to the cylinder-dividing regulating valve V203, superheated steam is conveyed to the heat supply cylinder E105, the air inflow entering the high-pressure cylinder E101 is further reduced, and the steam parameter of the heat supply cylinder E105 can be improved, so that the effect of deep peak regulation is achieved.
According to the heat supply network auxiliary peak regulation system provided by the embodiment of the application, reasonable gradient utilization of unit steam is realized by adding cold to the auxiliary steam pipeline, cold to the industrial steam extraction pipeline and the high-pressure bypass to the cold re-heating pipeline, and meanwhile, the system can have a deep peak regulation function, so that the peak regulation capacity of the cogeneration unit is further improved while the steam quantity required by heat supply in the peak regulation process is ensured.
In order to implement the above embodiments, the present application provides a heat supply network assisted peak shaving method.
Fig. 3 is a flowchart of a method for peak shaving assisted by a heat supply network according to an embodiment of the present application. It should be noted that the heat supply network auxiliary peak shaving method of the embodiment of the present application is applied to the heat supply network auxiliary peak shaving system of the above embodiment. As shown in fig. 3, the method may include:
and 301, under a normal operation condition, opening the cold re-extraction steam heating regulating valve and regulating the opening degree of the cold re-extraction steam heating regulating valve to meet the requirement of a first heat supply user, and opening the industrial steam extraction regulating valve on the industrial steam extraction pipeline and regulating the opening degree of the industrial steam extraction regulating valve to control the steam parameters of the heat supply steam distributing cylinder.
That is to say, under normal operating conditions, can satisfy first heat supply user's demand through the steam extraction of high pressure cylinder, satisfy second heat supply user's demand through the industry steam extraction steam of intermediate pressure cylinder.
The heat supply network auxiliary peak shaving system shown in fig. 1 can adjust the amount of cold re-steam by opening the cold re-steam extraction and heat supply regulating valve V102 and adjusting the opening degree thereof to control the heat supply parameters to meet the requirements of the first heat supply user. The steam quantity of the industrial extraction is controlled by opening and adjusting the opening of the industrial extraction regulating valve V105 on the industrial extraction pipeline P109 to control the steam parameters of the heat supply steam-distributing cylinder E105. The steam parameters of the second heating users are adjusted by adjusting the opening degree of the cylinder-divided heating regulating valve V109 on the heating network pipeline P113.
And step 302, under the peak regulation working condition, if the load of the unit is reduced, opening the high-pressure bypass to the cold re-heating regulating valve and regulating the opening degree of the high-pressure bypass to meet the requirement of a first heat supply user, and opening the low-pressure bypass to the cylinder-separating heat supply regulating valve and regulating the opening degree of the cylinder-separating heat supply regulating valve to control the steam parameters of the heat supply cylinder-separating cylinder. And under the normal operation condition, opening the industrial extraction steam-to-auxiliary steam regulating valve and the industrial extraction steam-to-feed pump steam turbine regulating valve and respectively regulating the respective opening degrees to regulate the steam parameters.
In some embodiments of the application, under the peak shaving operating mode, if the unit load reduces, the unit steam parameter reduces, and the cold steam extraction parameter gradually no longer satisfies first heat supply user's demand, because the superheated steam parameter is colder the steam parameter is higher relatively, can combine superheated steam to satisfy first heat supply user's demand. The peak shaving system of the heat supply network as shown in fig. 1 can open the high pressure bypass to the cold reheat valve V103 and adjust the opening thereof to increase the cold reheat steam parameter to meet the demand of the first heat supply user. Meanwhile, as the load of the unit is reduced, the hot re-steam parameters are reduced, and the industrial steam extraction steam parameters are reduced accordingly, so that the industrial steam extraction steam cannot meet the heat supply parameters of the heat supply steam distributing cylinder, namely the requirements of a second heat supply user. In this case, the industrial extraction steam and the hot re-steam can be combined to meet the requirement of the second heat supply user, as shown in fig. 1, the low-pressure bypass to the cylinder-divided heat supply adjusting valve V104 can be opened and the opening degree thereof can be adjusted to ensure that the steam parameter of the heat supply cylinder E105 is stable, and the steam parameter of the second heat supply user can be met by adjusting the opening degree of the cylinder-divided heat supply adjusting valve V109.
In other embodiments of the present application, to meet the normal operation of the auxiliary steam header and the feedwater pump turbine, the method may further comprise:
and step 303, under a normal operation condition, opening an industrial extraction steam-to-auxiliary steam regulating valve and an industrial extraction steam-to-feed pump steam turbine regulating valve and respectively regulating respective opening degrees to regulate steam parameters.
That is, the steam requirements of the auxiliary steam header and the feedwater pump turbine can be met by the industrial extraction steam. As shown in fig. 1, the heat supply network auxiliary peak shaving system can open the industrial extraction steam to the auxiliary steam shaving valve V106 and adjust the opening degree thereof to control the steam parameters of the auxiliary steam header E106 so as to enable the auxiliary steam header E106 to work normally. And opening the industrial extraction steam to a steam turbine regulating valve V107 of the feed pump and regulating the opening degree to control the steam parameters of the feed pump steam turbine so as to enable the feed pump steam turbine to work normally.
According to the heat supply network auxiliary peak shaving method, the high-pressure bypass to cold re-heating adjusting valve and the low-pressure bypass to the branch cylinder heating adjusting valve are opened under the peak shaving working condition, the requirements of heat supply users can be met by combining superheated steam and hot re-steam, so that the load change range under the peak shaving working condition can be enlarged, and the steam quantity required by heat supply in the peak shaving process can be ensured.
In order to further improve the peak shaving capacity of the cogeneration unit, another embodiment is provided.
Fig. 4 is a flowchart of another method for peak shaving assisted by a heat supply network according to an embodiment of the present application. As shown in fig. 4, the method may be used in a heat network assisted peak shaving system as shown in fig. 2, and may comprise the steps of:
And step 402, under the peak regulation working condition, if the load of the unit is reduced, opening the high-pressure bypass to the cold re-heating regulating valve and regulating the opening degree of the high-pressure bypass to meet the requirement of a first heat supply user, and opening the low-pressure bypass to the cylinder-separating heat supply regulating valve and regulating the opening degree of the cylinder-separating heat supply regulating valve to control the steam parameters of the heat supply cylinder-separating cylinder. And under the normal operation condition, opening the industrial extraction steam-to-auxiliary steam regulating valve and the industrial extraction steam-to-feed pump steam turbine regulating valve and respectively regulating the respective opening degrees to regulate the steam parameters.
And 403, under the normal operation condition, opening an industrial extraction steam-to-auxiliary steam regulating valve and an industrial extraction steam-to-feed pump steam turbine regulating valve and respectively regulating the respective opening degrees to regulate steam parameters.
And step 404, under the deep peak regulation working condition, closing the cold re-extraction heat supply regulating valve, and increasing the opening degree of the high-pressure bypass to the cold re-supply heat regulating valve to meet the requirement of a first heat supply user.
It can be understood that under the deep peak shaving working condition, the cold re-steam parameter can not meet the use requirement of the first heat supply user due to continuous reduction of the steam parameter, and the superheated steam is the steam with the highest quality in the unit thermodynamic cycle process, so that the requirement of the first heat supply user can be met through the superheated steam.
As shown in fig. 2, the peak shaving system can gradually increase the opening degree of the high-pressure bypass to the cold re-heating and heat-supplying regulating valve V103, close the cold re-steam-extraction and heat-supply regulating valve V102, and switch the heat supply pipeline of the first heat supply user from the cold re-heating and steam-extraction pipeline P105 to the high-pressure bypass to the cold re-heating and steam-extraction pipeline P104, so as to meet the heat supply requirement of the first heat supply user.
And 405, increasing the opening degree of the heat supply regulating valve of the low-pressure bypass to the steam-distributing cylinder, opening the cold bypass to the auxiliary steam regulating valve, and regulating the opening degree of the auxiliary steam regulating valve to meet the steam parameters of the heat supply steam-distributing cylinder and the auxiliary steam header.
It can be understood that under the deep peak regulation working condition, the hot re-steam parameters entering the intermediate pressure cylinder are reduced, so that the steam extraction parameters of the industrial steam extraction pipeline are reduced, and the steam parameters of the heat supply steam distributing cylinder, the auxiliary steam header and the water supply pump steam turbine during normal operation can not be met by utilizing the hot re-steam and the industrial steam extraction.
In the heat supply network auxiliary peak shaving system shown in fig. 2, in the early stage of deep peak shaving, the opening degree of the low-pressure bypass to cylinder-divided heat supply valve V104 can be gradually increased to control the steam parameters of the heat supply cylinder-divided. And then, opening a cold re-steam to auxiliary steam adjusting valve V201, and compensating the parameter reduction of the auxiliary steam header E106 caused by the parameter reduction of the industrial steam by using cold re-steam which is higher than the parameter of the industrial extracted steam.
And step 406, opening the auxiliary steam to a regulating valve of the feed pump turbine and regulating the opening of the regulating valve so as to ensure that the feed pump turbine works normally.
As shown in fig. 2, in order to ensure the normal operation of the feed pump turbine, the auxiliary steam may be opened to the feed pump turbine regulating valve V108 and the opening of the regulating valve V is adjusted, so as to satisfy the normal operation of the feed pump turbine by using the auxiliary steam.
In other embodiments of the present application, in order to satisfy the steam parameter of the heat supply cylinder, the method may further include, during the deep peaking condition:
Since the steam demand of the heat supply steam-distributing cylinder cannot be met by using hot re-steam and industrial extraction steam along with the reduction of the load, the reduction of the parameters of the heat supply steam-distributing cylinder can be compensated by combining cold re-steam which is higher than the parameters of the industrial extraction steam. As shown in fig. 2, the cold re-split cylinder adjustment valve V202 may be opened and adjusted in opening degree to control the steam parameters of the heating split cylinder E105 in combination with the cold re-steam, and the steam parameters of the second heating user may be satisfied by adjusting the opening degree of the split cylinder heating adjustment valve V109.
In order to further enhance the effect of depth peaking, the method may further include:
and step 408, opening the high-pressure bypass to the steam-distributing cylinder adjusting valve and adjusting the opening degree of the high-pressure bypass to reduce the steam inlet amount of the high-pressure cylinder.
Because the heat supply steam distributing cylinder has the function of heat storage, in order to achieve the purpose of deep peak regulation, the steam quantity of the superheated steam entering the high-pressure cylinder can be reduced, and the heat storage is realized through the heat supply steam distributing cylinder.
As shown in fig. 2, in the heat supply network auxiliary peak shaving system, under the deep peak shaving condition, the high-pressure bypass to the steam-distributing cylinder valve V203 can be opened and the opening degree thereof can be adjusted to reduce the steam intake of the high-pressure cylinder E101 and increase the steam amount of the superheated steam entering the heat supply steam-distributing cylinder E105, so that not only can the power generation amount of the high-pressure cylinder E101 be reduced, but also the steam parameters of the heat supply steam-distributing cylinder E105 can be satisfied, and simultaneously, the heat can be stored by the heat supply steam-distributing cylinder E105, thereby achieving the deep peak shaving effect.
According to the heat supply network auxiliary peak shaving method, under the deep peak shaving working condition, the opening degree of the high-pressure bypass to the cold re-heating and adjusting valve is increased, the opening degree of the low-pressure bypass to the branch cylinder heat supply and adjusting valve is increased, the cold re-auxiliary steam adjusting valve is opened, the cold re-steam is opened to the branch cylinder and adjusting valve, the requirement of a heat supply user is met by combining cold re-steam, and meanwhile, the auxiliary steam header and the water supply pump steam turbine work normally. In addition, the air input of the high-pressure cylinder is reduced by opening and adjusting the opening degree of the high-pressure bypass to the air-distributing cylinder adjusting valve by utilizing the heat storage function of the heat supply air-distributing cylinder, so that the effect of deep peak regulation is achieved.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following technologies, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer-readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. The utility model provides a peak shaving system is assisted to heat supply network, includes high pressure cylinder, intermediate pressure cylinder, low pressure cylinder, condenser, heat supply gas-distributing cylinder and auxiliary steam header, its characterized in that, wherein:
the inlet end of the high-pressure cylinder is connected with a superheated steam pipeline, and the steam exhaust end of the high-pressure cylinder is connected with a cold re-steam pipeline; the cold re-steam pipeline is connected with the cold re-heat supply steam extraction pipeline, a cold re-steam extraction heat supply adjusting valve is installed on the cold re-heat supply steam extraction pipeline, and the tail end of the cold re-heat supply steam extraction pipeline is connected to a first heat supply user;
a high-pressure bypass to cold re-heating pipeline is connected in front of a high-pressure bypass valve of the high-pressure bypass pipeline, the tail end of the high-pressure bypass to cold re-heating pipeline is connected to the cold re-heating steam extraction pipeline behind the cold re-steam extraction heat supply regulating valve, and the high-pressure bypass to cold re-heating steam extraction pipeline is provided with a high-pressure bypass to cold re-heating regulating valve;
the inlet end of the intermediate pressure cylinder is connected with a hot re-steam pipeline, the steam extraction port of the intermediate pressure cylinder is connected with an industrial steam extraction pipeline, and the tail end of the industrial steam extraction pipeline is connected with the heat supply branch cylinder; an industrial steam extraction regulating valve is arranged on the industrial steam extraction pipeline;
the low-pressure bypass pipeline is connected with a low-pressure bypass to cylinder-separating pipeline, the tail end of the low-pressure bypass to cylinder-separating pipeline is connected to the heat supply cylinder-separating cylinder, and a low-pressure bypass to cylinder-separating heat supply adjusting valve is mounted on the low-pressure bypass to cylinder-separating pipeline; the heat supply branch cylinder is connected with a heat supply network pipeline, the tail end of the heat supply network pipeline is connected to a second heat supply user, and a branch cylinder heat supply adjusting valve is installed on the heat supply network pipeline.
2. The system according to claim 1, wherein an industrial extraction steam-to-auxiliary steam pipeline and an industrial extraction steam-to-feed water pump turbine pipeline are connected with the industrial extraction steam pipeline in front of the industrial extraction steam regulating valve, the tail end of the industrial extraction steam-to-auxiliary steam pipeline is connected to the auxiliary steam header, and the industrial extraction steam-to-auxiliary steam pipeline is provided with an industrial extraction steam-to-auxiliary steam regulating valve; the tail end of the industrial steam extraction to water supply pump turbine pipeline is connected to a water supply pump turbine, and an industrial steam extraction to water supply pump turbine regulating valve is mounted on the industrial steam extraction to water supply pump turbine pipeline; the auxiliary steam header is connected with auxiliary steam to a water feed pump turbine pipeline, the end of the auxiliary steam to the water feed pump turbine pipeline is connected to the industrial steam extraction to the water feed pump turbine pipeline after the valve is adjusted to the water feed pump turbine, and the auxiliary steam is installed on the auxiliary steam to the water feed pump turbine pipeline and is adjusted to the water feed pump turbine.
3. The system of claim 2, wherein the cold re-steam conduit is connected to a cold re-to-auxiliary steam conduit, wherein an end of the cold re-to-auxiliary steam conduit is connected to the auxiliary steam header, and wherein a cold re-to-auxiliary steam trim valve is mounted on the cold re-to-auxiliary steam conduit.
4. The system of claim 2, wherein the cold re-to-auxiliary steam line before the cold re-to-auxiliary steam governor valve is connected to a cold re-to-industrial steam extraction line, an end of the cold re-to-industrial steam extraction line is connected to an industrial steam extraction line after the industrial steam extraction governor valve, and the cold re-to-industrial steam extraction line is mounted with a cold re-to-steam cylinder governor valve.
5. The system according to any one of claims 1 to 4, wherein a high pressure bypass to cold re-supply pipeline before the high pressure bypass to cold re-supply heat-regulation valve is connected with a high pressure bypass to split cylinder pipeline, the tail end of the high pressure bypass to split cylinder pipeline is connected to the heat supply split cylinder, and the high pressure bypass to split cylinder pipeline is provided with the high pressure bypass to split cylinder heat-regulation valve.
6. A heat supply network assisted peak shaving method, applied to the system of any one of claims 1 to 5, comprising:
under the normal operation condition, opening the cold re-extraction steam-supply heat-supply regulating valve and regulating the opening degree of the cold re-extraction steam-supply heat-supply regulating valve to meet the requirement of the first heat-supply user, and opening the industrial steam-extraction steam-supply regulating valve on the industrial steam-extraction pipeline and regulating the opening degree of the industrial steam-extraction steam-supply heat-supply regulating valve to control the steam parameters of the heat-supply steam-distributing cylinder;
under the peak regulation working condition, if the load of the unit is reduced, the high-pressure bypass to cold re-heating regulating valve is opened and the opening degree of the high-pressure bypass to cold re-heating regulating valve is adjusted to meet the requirement of the first heat supply user, and the low-pressure bypass to the steam-supply regulating valve of the steam-distributing cylinder is opened and the opening degree of the low-pressure bypass to the steam-supply regulating valve of the steam-distributing cylinder is adjusted to control the steam parameters of the heat-supply steam-distributing cylinder.
7. The method of claim 6, further comprising:
and under the normal operation condition, opening the industrial extraction steam-to-auxiliary steam regulating valve and the industrial extraction steam-to-feed pump steam turbine regulating valve and respectively regulating the respective opening degrees to regulate steam parameters.
8. The method of claim 7, further comprising:
under the deep peak regulation working condition, closing the cold re-extraction heat supply regulating valve, and increasing the opening of the high-pressure bypass to the cold re-supply heat regulating valve to meet the requirements of the first heat supply user;
increasing the opening degree of the heat supply regulating valve from the low-pressure bypass to the steam-distributing cylinder, opening the cold-secondary steam regulating valve and regulating the opening degree of the cold-secondary steam regulating valve to meet the steam parameters of the heat supply steam-distributing cylinder and the auxiliary steam header;
and opening the auxiliary steam to a regulating valve of the water feeding pump turbine and regulating the opening of the regulating valve so as to ensure that the water feeding pump turbine works normally.
9. The method of claim 8, further comprising:
and under the deep peak regulation working condition, opening the cold air re-inlet branch cylinder regulating valve and regulating the opening degree of the cold air re-inlet branch cylinder regulating valve so as to control the steam parameters of the heat supply branch cylinder.
10. The method of claim 9, further comprising:
and under the deep peak regulation working condition, opening the high-pressure bypass to the branch cylinder regulating valve and regulating the opening degree of the branch cylinder regulating valve so as to reduce the steam inlet amount of the high-pressure cylinder.
Priority Applications (2)
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| CN202210802090.0A CN115217560B (en) | 2022-07-08 | 2022-07-08 | Auxiliary peak shaving system and method for heat supply network |
| PCT/CN2022/139779 WO2024007539A1 (en) | 2022-07-08 | 2022-12-16 | Heat supply network auxiliary peak regulation system and method |
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| CN202210802090.0A CN115217560B (en) | 2022-07-08 | 2022-07-08 | Auxiliary peak shaving system and method for heat supply network |
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| CN115217560B (en) | 2023-10-20 |
| WO2024007539A1 (en) | 2024-01-11 |
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