CN112821426A - System and method for optimizing load distribution and AGC quick response of thermal power plant - Google Patents
System and method for optimizing load distribution and AGC quick response of thermal power plant Download PDFInfo
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- CN112821426A CN112821426A CN202110179731.7A CN202110179731A CN112821426A CN 112821426 A CN112821426 A CN 112821426A CN 202110179731 A CN202110179731 A CN 202110179731A CN 112821426 A CN112821426 A CN 112821426A
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00004—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the power network being locally controlled
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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
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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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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/14—Energy storage units
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
A thermal power plant load optimization distribution and AGC quick response system and method, the system includes RTU remote measurement and control terminal, RTU remote measurement and control terminal sends AGC load instruction of the whole plant to load distribution operation server, according to AGC load instruction control unit output corresponding power; each unit is also connected with an energy storage module, the energy storage module is connected with a load distribution operation server through an energy storage control system, the load distribution operation server is connected with an operation state evaluation system, the operation state evaluation system obtains real-time data of the energy storage module and the units and evaluates the state of the units, the load distribution operation server carries out load distribution adjustment on each unit and the energy storage module according to an evaluation result, and the energy storage control system controls the energy storage module to charge and discharge according to the difference value of the actual load and an AGC load instruction in the adjustment process so as to respond to the AGC load instruction. The invention can realize the quick and accurate response of the AGC command and prolong the service life of the unit.
Description
Technical Field
The invention belongs to the field of thermal power plant Control, and particularly relates to a thermal power plant load optimization distribution and AGC (Automatic Generation Control) quick response system and method.
Background
In the face of a severe market examination, not only needs to start from own interests and consider how to actually reduce the operating cost of a power plant in a deep level from multiple angles, but also needs to prolong the service life and the overhaul period of a unit.
At present, most AGC of the thermal power plant adopts a single-machine AGC mode that a load instruction is directly sent to a unit which is put into the AGC by scheduling. In this way, because the load of the power grid changes very frequently, the power grid balances the power load in time, so that the unit which is put into the AGC is always in a corresponding variable load state, the coal, the wind and the water of the unit change along with the change of the load, the steam pressure and the temperature fluctuate to and fro greatly, and the service life of the unit is greatly influenced. In addition, the auxiliary machines, valves, dampers and other devices frequently operate, reducing the service life of these devices. Meanwhile, the load adjustment of a single unit is restricted by an AGC instruction, so that the unit is not favorable for flexibly carrying out operations such as high-load soot blowing, variable-load decoking and the like. When the single machine is used for AGC, the load regulation of each machine set is discontinuous due to the reasons that the load locking is increased or decreased and the like caused by the out-of-limit of the parameters of the machine set due to the starting and stopping of a coal mill or a combustor. Therefore, the AGC frequency modulation performance of the thermal power generating unit often has a gap from the adjustment expectation of the power grid, and problems such as delay and deviation of adjustment may occur.
Disclosure of Invention
The invention aims to solve the problem of discontinuous load adjustment of the thermal power plant unit in the prior art, and provides a system and a method for optimal load distribution and AGC quick response of the thermal power plant, which can complete the optimal load distribution in the plant according with the load requirement of the unit on the premise of meeting the AGC adjustment expectation of a power grid, and achieve the quick and accurate response of an AGC instruction.
In order to achieve the purpose, the invention has the following technical scheme:
a load optimization distribution and AGC quick response system of a thermal power plant comprises an RTU remote measurement and control terminal, wherein the RTU remote measurement and control terminal sends an AGC load instruction of the whole plant to a load distribution operation server, and the load distribution operation server controls a corresponding unit to output corresponding power according to the AGC load instruction; each unit is also connected with an energy storage module, the energy storage module is connected with a load distribution operation server through an energy storage control system, the load distribution operation server is also connected with an operation state evaluation system, the operation state evaluation system acquires real-time data of the energy storage module and the units and evaluates the state of the units, an evaluation result is fed back to the load distribution operation server, the load distribution operation server carries out load distribution adjustment on each unit and the energy storage module according to the evaluation result, the difference value between the actual load of the units and an AGC load instruction in the adjustment process is transmitted to the energy storage control system through the load distribution operation server, and the energy storage control system controls the energy storage module to charge and discharge according to the difference value so as.
Preferably, the operation state evaluation system is provided with a storage module for storing real-time data.
Preferably, the RTU remote measurement and control terminal can be wirelessly and remotely connected with a power grid master control platform.
Preferably, the operation state evaluation system adopts a sub-function module of the SIS safety instrument system.
Preferably, the RTU remote measurement and control terminal is connected with and collects the total power of the energy storage module and each unit.
Preferably, each unit in the plant is networked through a DCS system.
Preferably, the operation state evaluation system obtains real-time data of each unit through the DCS system.
Preferably, the energy storage control system obtains real-time data of the energy storage module through the energy storage control system.
The invention also provides a load optimization distribution and AGC quick response method of the thermal power plant, which comprises the following steps:
-sending plant-wide AGC load instructions to a load distribution calculation server;
the load distribution operation server controls the corresponding unit to output corresponding power according to the AGC load instruction;
connecting each unit of the whole plant with an energy storage module, acquiring real-time data of the energy storage module and each unit, evaluating the state of the unit, and feeding an evaluation result back to a load distribution operation server;
and the load distribution operation server performs load distribution adjustment on each unit and the energy storage module according to the evaluation result, and the energy storage module charges and discharges according to the difference value between the actual load of the unit and the AGC load instruction so as to respond to the AGC load instruction.
Preferably, the load distribution of each unit of the power plant is adjusted according to the following principle:
a. the unit is optimally operated under the condition of constant load;
b. the change amplitude of the superheated steam temperature and the reheated steam temperature is kept minimum when the load is changed;
c. if the load change exceeds the output of all the units and the energy storage modules, feeding back information to a power grid master control platform;
d. and setting the maximum load change rate of the unit for safe operation, wherein the load change rate of a single unit does not exceed the maximum load change rate in the load adjustment process.
Compared with the prior art, the invention has the following beneficial effects: the whole power plant is taken as an AGC (automatic gain control) adjustment object, a power grid dispatching system sends a whole plant load instruction to the power plant, a whole plant load distribution and monitoring system is composed of a load distribution operation server and an operation state evaluation system, an energy storage module is added to participate in load adjustment, the capacity of quickly adjusting output power is utilized by the energy storage module, the purpose of AGC quick response is achieved, and meanwhile steam pressure and temperature can be prevented from fluctuating back and forth greatly and frequent actions of auxiliary equipment can be avoided.
Furthermore, the load distribution of the invention follows the following principle, the unit is best when running with the constant load, and the change amplitude of the superheated steam temperature and the reheated steam temperature is minimum when the load is changed, which is the core of control, can reduce the generation, the shedding and the precipitation of oxide skin on a heating surface, reduce the influence of the large change of the steam temperature on the stable operation of the steam turbine, reduce the metal fatigue degree, and prolong the service life of main equipment. And if the load change is large and exceeds the output of all the units and the energy storage modules, feeding back information to the power grid master control platform. The power plant also feeds back information to the power grid master control platform while responding to the load change, so that the characteristic of the single instruction of the current AGC is changed, and the subsystem and the control system can fully exchange information. And the maximum load change rate protection of the safe operation of the unit is set. In the adjusting process, the difference value between the actual load of the unit and the AGC instruction is transmitted to the energy storage control system by the load distribution operation server, and the energy storage control system controls the energy storage module to rapidly charge and discharge according to the difference value, so that the AGC instruction can be rapidly and accurately responded.
Drawings
FIG. 1 is a schematic diagram of a load optimization distribution and AGC quick response system of a thermal power plant according to the present invention;
in the drawings: 1-RTU remote measurement and control terminal; 2-load distribution calculation server; 3-an energy storage module; 4-an energy storage control system; 5-running state evaluation system; 6-power grid master control platform.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the load optimization distribution and AGC quick response system of the thermal power plant comprises an RTU remote measurement and control terminal 1, wherein the RTU remote measurement and control terminal 1 is wirelessly and remotely connected with a power grid master control platform 6. The RTU remote measurement and control terminal 1 sends AGC load instructions of a whole plant to the load distribution operation server 2, and the load distribution operation server 2 controls corresponding units to output corresponding power according to the AGC load instructions; and all the units in the plant are networked through a DCS system. Each unit is further connected with an energy storage module 3, the energy storage module 3 is connected with a load distribution operation server 2 through an energy storage control system 4, the load distribution operation server 2 is further connected with an operation state evaluation system 5, the operation state evaluation system 5 obtains real-time data of each unit through a DCS (distributed control system), the energy storage control system 4 obtains the real-time data of the energy storage module 3, an evaluation result is fed back to the load distribution operation server 2, the operation state evaluation system 5 adopts a sub-function module of an SIS (SIS safety instrumentation system), and the operation state evaluation system 5 is provided with a storage module for storing the real-time data. The load distribution operation server 2 carries out load distribution adjustment on each unit and the energy storage module 3 according to the evaluation result, the difference value between the actual load of the unit and the AGC load instruction in the adjustment process is transmitted to the energy storage control system 4 by the load distribution operation server 2, and the energy storage control system 4 controls the energy storage module 3 to charge and discharge according to the difference value so as to respond to the AGC load instruction. The RTU remote measurement and control terminal 1 is connected with and collects the total power of the energy storage module 3 and each unit.
A load optimization distribution and AGC quick response method for a thermal power plant comprises the following steps:
sending AGC load instructions of the whole plant to the load distribution calculation server 2;
the load distribution operation server 2 controls the corresponding set to output the corresponding power according to the AGC load instruction;
connecting each unit of the whole plant with the energy storage module 3, acquiring the energy storage module 3 and real-time data of each unit, performing unit state evaluation, and feeding an evaluation result back to the load distribution operation server 2;
the load distribution operation server 2 performs load distribution adjustment on each unit and the energy storage module 3 according to the evaluation result, and the energy storage module 3 charges and discharges according to the difference value between the actual load of the unit and the AGC load instruction so as to respond to the AGC load instruction.
Load distribution and adjustment are carried out on each unit of the power plant according to the following principle:
a. the unit is optimally operated under the condition of constant load;
b. the change amplitude of the superheated steam temperature and the reheated steam temperature is kept minimum when the load is changed;
c. if the load change exceeds the output of all the units and the energy storage modules, feeding back information to the power grid master control platform 6;
d. and setting the maximum load change rate of the unit for safe operation, wherein the load change rate of a single unit does not exceed the maximum load change rate in the load adjustment process.
And the power grid dispatching transmits the load instruction of the whole plant to a load distribution operation server 2 in the plant through an RTU remote measurement and control terminal 1. The operation state evaluation system 5 acquires real-time data of the unit and the energy storage module 3 from the DCS and the energy storage control system 4, stores the real-time data into a database, completes calculation in a workstation of the operation state evaluation system, evaluates the state of an important auxiliary machine and the unit in real time, and transmits the result to the load distribution operation server 2 and the power grid master control platform 6. And a feedback signal of the total output of the unit and the energy storage module 3 is uploaded to a power grid general control platform 6. And according to the state evaluation result of the unit, when a certain unit needs to perform operations such as high-load soot blowing, variable-load decoking and the like. And on the premise of meeting the total load requirement of the AGC command, load adjustment among the machine groups is carried out according to the principle.
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and it should be understood by those skilled in the art that the technical solution can be modified and replaced by a plurality of simple modifications and replacements without departing from the spirit and principle of the present invention, and the modifications and replacements also fall into the protection scope covered by the claims.
Claims (10)
1. A load optimization distribution and AGC quick response system of a thermal power plant is characterized by comprising an RTU remote measurement and control terminal (1), wherein the RTU remote measurement and control terminal (1) sends an AGC load instruction of a whole plant to a load distribution operation server (2), and the load distribution operation server (2) controls a corresponding unit to output corresponding power according to the AGC load instruction; each unit is also connected with an energy storage module (3), the energy storage module (3) is connected with a load distribution operation server (2) through an energy storage control system (4), the load distribution operation server (2) is also connected with an operation state evaluation system (5), the operation state evaluation system (5) obtains real-time data of the energy storage module (3) and the units and evaluates the state of the units, an evaluation result is fed back to the load distribution operation server (2), the load distribution operation server (2) carries out load distribution adjustment on each unit and the energy storage module (3) according to the evaluation result, a difference value between an actual load of the unit and an AGC load instruction in an adjustment process is transmitted to the energy storage control system (4) through the load distribution operation server (2), and the energy storage control system (4) controls the energy storage module (3) to charge and discharge according to the AGC load instruction.
2. The thermal power plant load optimized distribution and AGC fast response system of claim 1, wherein: the running state evaluation system (5) is provided with a storage module for storing real-time data.
3. The thermal power plant load optimized distribution and AGC fast response system of claim 1, wherein: the RTU remote measurement and control terminal (1) can be wirelessly and remotely connected with a power grid general control platform (6).
4. The thermal power plant load optimized distribution and AGC fast response system of claim 1, wherein: the running state evaluation system (5) adopts a sub-function module of the SIS safety instrument system.
5. The thermal power plant load optimized distribution and AGC fast response system of claim 1, wherein: the RTU remote measurement and control terminal (1) is connected with and collects the total power of the energy storage module (3) and each unit.
6. The thermal power plant load optimized distribution and AGC fast response system of claim 1, wherein: and all the units in the plant are networked through a DCS system.
7. The thermal power plant load optimized distribution and AGC fast response system of claim 6, wherein: and the running state evaluation system (5) acquires real-time data of each unit through the DCS.
8. The thermal power plant load optimized distribution and AGC fast response system of claim 1, wherein: the energy storage control system (4) acquires real-time data of the energy storage module (3) through the energy storage control system (4).
9. A load optimization distribution and AGC quick response method for a thermal power plant is characterized by comprising the following steps:
-sending plant-wide AGC load instructions to a load distribution calculation server (2);
-the load distribution calculation server (2) controls the corresponding set to output the corresponding power according to the AGC load instruction;
connecting each unit of the whole plant with the energy storage module (3), acquiring the energy storage module (3) and real-time data of each unit, evaluating the state of each unit, and feeding the evaluation result back to the load distribution operation server (2);
the load distribution operation server (2) performs load distribution adjustment on each unit and the energy storage module (3) according to the evaluation result, and the energy storage module (3) charges and discharges according to the difference value between the actual load of the unit and the AGC load instruction so as to respond to the AGC load instruction.
10. The method of claim 9, wherein the load distribution of each unit of the power plant is adjusted according to the following principles:
a. the unit is optimally operated under the condition of constant load;
b. the change amplitude of the superheated steam temperature and the reheated steam temperature is kept minimum when the load is changed;
c. if the load change exceeds the output of all the units and the energy storage modules, feeding back information to a power grid master control platform (6);
d. and setting the maximum load change rate of the unit for safe operation, wherein the load change rate of a single unit does not exceed the maximum load change rate in the load adjustment process.
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| CN202110179731.7A CN112821426A (en) | 2021-02-07 | 2021-02-07 | System and method for optimizing load distribution and AGC quick response of thermal power plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113268699A (en) * | 2021-05-20 | 2021-08-17 | 西安热工研究院有限公司 | Industrial steam supply power plant heat load plant-level optimal distribution system and method |
| CN113809781A (en) * | 2021-09-16 | 2021-12-17 | 西安热工研究院有限公司 | AGC frequency modulation control system and method for super-capacitor energy storage auxiliary thermal power unit |
| CN116247720A (en) * | 2022-12-02 | 2023-06-09 | 国电环境保护研究院有限公司 | Control device for fire-storage combined frequency modulation and fire-storage combined frequency modulation system |
-
2021
- 2021-02-07 CN CN202110179731.7A patent/CN112821426A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113268699A (en) * | 2021-05-20 | 2021-08-17 | 西安热工研究院有限公司 | Industrial steam supply power plant heat load plant-level optimal distribution system and method |
| CN113809781A (en) * | 2021-09-16 | 2021-12-17 | 西安热工研究院有限公司 | AGC frequency modulation control system and method for super-capacitor energy storage auxiliary thermal power unit |
| CN113809781B (en) * | 2021-09-16 | 2024-02-23 | 西安热工研究院有限公司 | Control system and method for AGC frequency modulation of super capacitor energy storage auxiliary thermal power unit |
| CN116247720A (en) * | 2022-12-02 | 2023-06-09 | 国电环境保护研究院有限公司 | Control device for fire-storage combined frequency modulation and fire-storage combined frequency modulation system |
| CN116247720B (en) * | 2022-12-02 | 2023-11-24 | 国电环境保护研究院有限公司 | Control device for fire-storage combined frequency modulation and fire-storage combined frequency modulation system |
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