CN117154789A - Medium-voltage direct-current energy storage system for thermal power plant - Google Patents
Medium-voltage direct-current energy storage system for thermal power plant Download PDFInfo
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Classifications
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
- H02J13/00001—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 display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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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
- H02J13/00002—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 monitoring
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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
- H02J13/00006—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Engineering & Computer Science (AREA)
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- Human Computer Interaction (AREA)
- Computer Networks & Wireless Communication (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a medium-voltage direct-current energy storage system for a thermal power plant, and relates to the technical field of medium-voltage direct-current energy storage. The medium-voltage direct-current energy storage system for the thermal power plant comprises a thermal power system and an energy storage control system. The energy storage control system is divided into two synchronous and independent module control ends, the two synchronous monitoring and the unique leading are realized, the running stability is ensured, the control of current and voltage is realized by adopting two groups of monitoring and unidirectional control methods, so that the control and protection of the energy storage system are realized, the energy storage system has fault blocking and switching capacity during high-voltage direct-current short circuit, the running stability of a unit is improved, the benefit of a power plant is also improved, meanwhile, the cooling and switching of the energy storage assembly are intelligently performed to adjust rated voltage and rated current, the application universality of the control system is improved, the standby capacity of the energy storage module is not increased, the maintenance of the energy storage module is facilitated, and the configuration cost and the maintenance cost of the energy storage system are reduced.
Description
Technical Field
The invention relates to the technical field of medium-voltage direct-current energy storage, in particular to a medium-voltage direct-current energy storage system for a thermal power plant.
Background
At present, the typical design of a factory power system of a large thermal power generating unit is to tap out a high-voltage factory transformer through an outlet of a generator, set a factory high-voltage bus system, lead over 200kW factory power from the factory high-voltage bus, set a steam-driven pump for rotating speed adjustment for reducing factory power consumption and a water supply pump with the largest electric load, and realize load adjustment by a large fan by considering investment and energy-saving economy in a general movable blade adjustable mode and generally selecting variable frequency adjustment for load adjustment of low-voltage power. The energy storage system has the advantages of high response speed, high short-time power throughput capacity and flexible adjustment, can realize full power output in millisecond to second, and can be accurately controlled in rated power. Related researches show that the frequency modulation efficiency of the energy storage system with the continuous charge/discharge time of 15min is 1.4 times of that of the hydroelectric generating set, 2.2 times of that of the gas generating set and 24 times of that of the coal-fired generating set.
The prior patent (publication number: CN 114825410A) discloses a medium-voltage direct-current energy storage system for a thermal power plant, which comprises: the system comprises a factory alternating current unit and a direct current medium voltage energy storage unit, wherein the factory alternating current unit is connected with the direct current medium voltage energy storage unit; the factory alternating-current unit comprises a bidirectional PCS converter, and is used for carrying out power exchange with the direct-current medium-voltage energy storage unit through the bidirectional PCS converter; the direct-current medium-voltage energy storage unit comprises an electrochemical energy storage battery, and the direct-current medium-voltage energy storage unit comprises an electrochemical energy storage battery, a factory frequency conversion inversion driver, a water supply pump, a frequency conversion large fan grid-connected switch, a water supply pump and a frequency conversion large fan.
In this patent, utilize electrochemical energy storage battery to participate in unit response AGC frequency modulation, just medium-voltage direct current energy storage system for thermal power plant still has mill's frequency conversion feed pump and the large-scale fan of frequency conversion, need not the rectification drive link in the variable frequency device, has simplified inverter, has improved the power supply reliability of medium-voltage direct current energy storage system for thermal power plant, but does not consider the dynamic change of energy storage port voltage to the influence of system power distribution, can't carry out effective control to energy storage module's charge and discharge according to direct current bus's voltage, leads to having the security not high, control protection is incomplete.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a medium-voltage direct-current energy storage system for a thermal power plant, which solves the problems of low safety and incomplete control and protection of the current direct-current energy storage system.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the medium-voltage direct-current energy storage system for the thermal power plant comprises a thermal power system and an energy storage control system, wherein the energy storage control system is connected with a display unit and an auxiliary system through a wireless communication technology, the energy storage control system is connected with an energy storage component through a transmission cable, and the energy storage component is connected with an inverter through a transmission wire and is synchronously connected with the auxiliary system;
the energy storage control system comprises a first module and a second module, wherein a supervision unit is electrically connected between the first module and the second module, the energy storage control system is connected with the thermal power system through a transformer and a cable for power conversion, and the first module and the second module are both connected with the thermal power system.
Preferably, the first module and the second module each comprise a control module for regulating operation, a data conversion module for A/D digital-to-analog conversion, a data receiving module for receiving data, a data storage module for storing data, an embedded single-chip processor-based intelligent early warning module for warning and an autonomous updating module capable of realizing data updating.
Preferably, the control module comprises a data acquisition module of an acquisition end, a data calling module for scheduling use, a data recording module and a data analysis module, wherein the data acquisition module comprises thermal power system data and auxiliary system data.
Preferably, the thermal power system is a thermal power plant generator set, wherein the thermal power plant generator set comprises two alternating current buses for plants, and the two alternating current buses for plants are respectively connected with the two transformers.
Preferably, the energy storage assembly comprises a plurality of energy storage battery containers, wherein a plurality of storage battery packs are arranged in the plurality of energy storage battery containers, and an energy storage end and an energy release end are arranged in the plurality of energy storage battery containers.
Preferably, the auxiliary system comprises a plurality of current and voltage detectors, temperature sensors and an energy storage group auxiliary management and emergency stop module, wherein the current and voltage detectors are arranged at current transmission ports, the temperature sensors are respectively arranged at the outer walls of the energy storage components, and the energy storage group auxiliary management comprises a battery management system high-integration voltage acquisition integrated circuit.
Preferably, the plurality of current and voltage detectors, the temperature sensor and the auxiliary management of the energy storage group all comprise a signal transmission module, a signal detection module, a signal interface end and a signal acquisition module.
Preferably, the display unit is a high-definition electronic screen display.
Working principle: the system is characterized in that an energy storage system is divided into two modules, the two modules are connected with a main power loop of the thermal power system through cables, a transformer is connected into the thermal power plant system respectively, a first module and a second module are connected in a supervision mode through a supervision unit, the first module and the second module are divided into a main control and an auxiliary control, the main control and the auxiliary control are used together but only one is used for regulation and control, when the supervision unit finds that the main control fails and stops working, the main control stops converting the auxiliary control into an independent main control to continuously work, the auxiliary system performs data acquisition on output voltage of the thermal power system and output voltage after the transformer is boosted or reduced, and simultaneously performs data acquisition on input voltage, output voltage and electric quantity energy storage quantity of a plurality of energy storage components, and performs battery capacity estimation, battery residual quantity estimation, battery fault diagnosis, balanced control strategy, safety control strategy and early warning emergency stop.
(III) beneficial effects
The invention provides a medium-voltage direct-current energy storage system for a thermal power plant. The beneficial effects are as follows:
1. the invention provides a medium-voltage direct-current energy storage system for a thermal power plant, which is characterized in that an energy storage control system is divided into two synchronous and independent module control ends, the two module control ends are synchronously supervised and exclusively dominant, the running stability is ensured, and the control of current and voltage is realized by adopting two groups of supervision and unidirectional control methods, so that the control and the protection of the energy storage system are realized, the energy storage system has fault blocking and switching capacity during high-voltage direct-current short-circuit, the running stability of a unit is improved, and the benefit of a power plant is also improved.
2. The invention provides a medium-voltage direct-current energy storage system for a thermal power plant, which is characterized in that an auxiliary system is additionally utilized, the auxiliary system utilizes a temperature sensor, a current and voltage detector and an energy storage group based on a high-integration-level voltage acquisition integrated circuit of a battery management system to carry out the real-time monitoring of an energy storage component, an internal digital-to-analog conversion module converts an electric signal into a digital signal, and the temperature reduction and conversion of the energy storage component are intelligently carried out according to the data display of a display unit so as to adjust the rated voltage and the rated current, thereby improving the applicability of a control system, simultaneously avoiding the increase of the standby capacity of the energy storage module, facilitating the maintenance of the energy storage module and reducing the configuration cost and the maintenance cost of the energy storage system.
Drawings
FIG. 1 is a system frame diagram of the present invention;
FIG. 2 is a structural frame diagram of the energy storage control system of the present invention;
FIG. 3 is a structural frame diagram of the auxiliary system of the present invention;
FIG. 4 is a flow chart of the present invention;
FIG. 5 is a structural frame diagram of a control module of the present invention;
fig. 6 is a schematic structural frame diagram of the various components of the auxiliary system of the present invention.
The energy storage control system comprises a power supply system, an energy storage system and a power supply system, wherein 1 is an energy storage control system; 101. a first module; 102. a second module; 103. a control module; 10301. a data acquisition module; 10302. a data calling module; 10303. a data recording module; 10304. a data analysis module; 104. a data conversion module; 105. a data receiving module; 106. a data storage module; 107. a singlechip processor; 108. an intelligent early warning module; 109. an autonomous updating module; 2. a transformer; 3. a thermal power system; 4. a display unit; 5. an energy storage assembly; 6. an inverter; 7. an auxiliary system; 701. a current and voltage detector; 702. a temperature sensor; 703. an emergency stop module; 704. auxiliary management of the energy storage group; 8. a supervision unit; 9. a signal transmission module; 10. a signal detection module; 11. a signal interface end; 12. and the signal acquisition module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples:
as shown in fig. 1-6, an embodiment of the present invention provides a medium voltage dc energy storage system for a thermal power plant, which includes a thermal power system 3 and an energy storage control system 1, where the energy storage control system 1 is connected with a display unit 4 and an auxiliary system 7 through a wireless communication technology, the energy storage control system 1 is connected with an energy storage component 5 through a transmission cable, the energy storage component 5 is connected with an inverter 6 through a transmission wire and is synchronously connected with the inverter 6 to the auxiliary system 7, the display unit 4 is a high-definition electronic screen display, the inverter 6 converts a transmission dc power connected with a cable in the power plant into a high-frequency ac power, and the display unit 4 displays various data including power, a current power value, a current transmission value, etc. of each component in the system;
the energy storage control system 1 comprises a first module 101 and a second module 102, wherein a supervision unit 8 is electrically connected between the first module 101 and the second module 102, the energy storage control system 1 is connected with the thermal power system 3 through a transformer 2 and a cable for power conversion, the first module 101 and the second module 102 are both connected with the thermal power system 3, the first module 101 and the second module 102 are connected with a main power loop of the thermal power system 3 through cables in a common supervision and single control mode by two modules, and the first module 101 and the second module 102 are respectively connected into the thermal power system 3 through the transformer 2.
The first module 101 and the second module 102 both comprise a control module 103 for regulating operation, the control module 103 is intelligently regulated by a single chip processor 107, and comprises a data receiving module, a data conversion module 104 for carrying out data conversion, a data processing module, an early warning function regulation and control module 104 for carrying out A/D digital-analog conversion, a data receiving module 105 for receiving data detected and collected by each module in the auxiliary system 7 and carrying out data transmission and receiving among a plurality of interconnected modules in the energy storage control system 1, a data storage module 106 for storing data, and the like, wherein the data storage module comprises a single chip processor 107 based on embedded single chip processor 107 for controlling the operation and supervision of each module, and carrying out system data processing, an intelligent early warning module 108 for giving an alarm and an automatic updating module 109 capable of realizing data updating according to command signals, and the automatic updating module 109 completes various automatic updating links such as timing storage, cleaning, automatic resetting and the like of system data. An intelligent processing system based on deep learning is arranged in the singlechip processor 107, the singlechip processor 107 is utilized to enable the system to carry out periodic setting according to the autonomous updating module 109, periodic timing inspection is completed, management early warning accuracy is improved, unmanned management early warning process of remote operation, field regulation and control and system automation is realized, operation is simple and convenient, and management early warning is rapid and quicker.
The early warning flow method of the intelligent early warning module 108 comprises the following steps:
a. the control module 103 in the system regulates the data acquisition module 10301 and the data storage module 106 to acquire various data such as current and voltage of the energy storage components 5, current and voltage data transmitted by the inverter 6, temperature and the like by the temperature sensor 702, the current and voltage detector 701 and the energy storage component auxiliary management 704 in the auxiliary system 7 and data conversion by the data conversion module 104;
b. the converted data is intelligently compared by intelligent comparison detection in a processor, the analysis energy storage component 5 receives the comparison of the current voltage and the current voltage output by the thermal power generation group through the transformer 2, and the current power supply input and output voltage and current are compared according to the rated voltage and current, so that the operation of the rated voltage and the rated current can be intelligently distinguished, converted and adjusted;
c. when the comparison value exceeds the early warning range value, the intelligent early warning module 108 sends early warning information to send early warning to the system to finish early warning reminding, and meanwhile the scram module 703 cuts off transmission of the transmission power flow.
The maximum value and the minimum value of the initial range threshold are set according to the processor based on the embedded single chip microcomputer in the intelligent early warning module 108, and the maximum and minimum range values are set due to loss generated by current and voltage transmission, so that the false alarm rate of early warning management can be effectively reduced, the early warning accuracy is improved, the workload is reduced, and the cost is reduced.
The control module 103 comprises a data acquisition module 10301 at an acquisition end, a data calling module 10302 for scheduling use, a data recording module 10303 and a data analysis module 10304, wherein the data acquisition module 10301 comprises thermal power system 3 data and auxiliary system 7 data, the thermal power system 3 is a thermal power plant generating set, the thermal power plant generating set comprises two plant alternating current buses, the two plant alternating current buses are respectively connected with the two transformers 2, when the system is operated in a dual-mode, only one module can be set as a control type frequency modulation module according to the regulation of frequency modulation operation, the other module is operated in a accompany supervision mode, and an operator can set any one of the modules as the control type frequency modulation module to the scheduling application according to the requirement, and then the energy storage system is connected in, so that the frequency modulation response speed of the module is improved.
The energy storage assembly 5 comprises a plurality of energy storage battery containers, wherein a plurality of storage battery packs are arranged in the plurality of energy storage battery containers and are provided with energy storage ends and energy release ends, the auxiliary system 7 comprises a plurality of current and voltage detectors 701, a temperature sensor 702, an energy storage group auxiliary management 704 and an emergency stop module 703, the current and voltage detectors 701 are arranged at current transmission ports, the plurality of temperature sensors 702 are respectively arranged at the outer walls of the plurality of energy storage assemblies 5, the energy storage group auxiliary management 704 comprises a battery management system high-integration voltage acquisition integrated circuit, and the plurality of current and voltage detectors 701, the temperature sensor 702 and the energy storage group auxiliary management 704 all comprise a signal transmission module 9, a signal detection module 10, a signal interface end 11 and a signal acquisition module 12.
The whole energy storage control system 1 is connected with the thermal power system 3, the first module 101 and the second module 102 synchronously operate and are supervised by the supervision unit 8, the first module 101 serves as a main control unit, the supervision unit 8 performs data and operation supervision on the first module 101 and performs data comparison with the second module 102, at the moment, the second module 102 only performs data acquisition operation which is the same as that of the first module 101, operation and release of a program instruction are not included, when the first module 101 fails, the supervision unit 8 gives control right to the second module 102 to perform main control, at the moment, the generator set data and the set output frequency contained in the thermal power system 3 are acquired by the data acquisition module 10301, namely, the control module 103 performs data acquisition through the control data acquisition module 10301, meanwhile, the data acquisition module 10301 also performs acquisition on a plurality of currents and voltage detectors 701, a temperature sensor 702 and data of the auxiliary management 704 contained in the auxiliary system 7, the acquired data are converted into digital signals according to the data conversion module 104, the data are distributed to the data in the data storage module 106, the data are recorded and stored by the data recording module 10303, and then the data are subjected to data analysis module 10302 is called by the control module 103 according to the data analysis module 103, and the data analysis module needs to be analyzed by the control module 10302. At this time, the charge and discharge power values of each operation module in the current system are determined in real time according to the acquired data, whether to alarm and scram operation is determined by the intelligent early warning module 108 after the intelligent data of the processors are monitored and compared, and under the cooperation of the autonomous updating module 109, autonomous intelligent operation works such as resetting, timing recording and the like are performed according to whether the early warning module alarms.
The rated input voltage and input current of the energy storage component 5 are detected by the plurality of current and voltage detectors 701, the temperature sensor 702 and the auxiliary management 704 of the energy storage group, then the detection result is transmitted to the signal acquisition module 12 through the signal transmission module 9, the signal acquisition module 12 transmits the information to the system, the singlechip processor 107 in the system converts the power supply voltage and the power supply current of the energy storage component 5 into the rated voltage and the current of the energy storage component 5 according to the information, so that the energy storage component 5 can work normally, a cooling pipe is started to cool at the same time, the cooling of the energy storage component 5 and the operation of converting and regulating the rated voltage and the rated current are intelligently performed, the application universality of a control system is improved, the standby capacity of the energy storage module is not required to be increased, the maintenance of the energy storage module is facilitated, and the configuration cost and the maintenance cost of the energy storage system are reduced.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a medium voltage direct current energy storage system for thermal power plant, includes thermal power system (3) and energy storage control system (1), its characterized in that: the energy storage control system (1) is connected with the display unit (4) and the auxiliary system (7) through a wireless communication technology, the energy storage control system (1) is connected with the energy storage component (5) through a transmission cable, and the energy storage component (5) is connected with the inverter (6) through a transmission wire and is synchronously connected with the auxiliary system (7) with the inverter (6);
the energy storage control system (1) comprises a first module (101) and a second module (102), wherein a supervision unit (8) is electrically connected between the first module (101) and the second module (102), and the energy storage control system (1) is connected with the thermal power system (3) through a transformer (2) and a cable for power conversion.
2. The system according to claim 1, wherein: the first module (101) and the second module (102) comprise a control module (103) for regulating operation, a data conversion module (104) for A/D digital-to-analog conversion, a data receiving module (105) for receiving data, a data storage module (106) for storing data, an embedded single-chip microcomputer processor (107), an intelligent early warning module (108) for alarming and an autonomous updating module (109) for updating data.
3. The system according to claim 2, wherein: the control module (103) comprises a data acquisition module (10301) at an acquisition end, a data calling module (10302) for scheduling use, a data recording module (10303) and a data analysis module (10304), wherein the data acquisition module (10301) comprises thermal power system data and auxiliary system data.
4. The system according to claim 1, wherein: the thermal power system (3) is a thermal power plant generating set, wherein the thermal power plant generating set comprises two alternating current buses for plants, and the two alternating current buses for plants are respectively connected with the two transformers (2).
5. The system according to claim 1, wherein: the energy storage assembly (5) comprises a plurality of energy storage battery containers, wherein a plurality of storage battery packs are arranged in the energy storage battery containers, and an energy storage end and an energy release end are arranged in the energy storage battery containers.
6. The system according to claim 1, wherein: the auxiliary system (7) comprises a plurality of current and voltage detectors (701), temperature sensors (702), energy storage group auxiliary management (704) and an emergency stop module (703), wherein the current and voltage detectors (701) are arranged at current transmission ports, the temperature sensors (702) are respectively arranged at the outer walls of the energy storage components (5), and the energy storage group auxiliary management (704) comprises a battery management system high-integration voltage acquisition integrated circuit.
7. The system according to claim 6, wherein: the plurality of current and voltage detectors (701), the temperature sensor (702) and the energy storage group auxiliary management (704) comprise a signal transmission module (9), a signal detection module (10), a signal interface end (11) and a signal acquisition module (12).
8. The medium voltage direct current energy storage system for a thermal power plant according to claim 1, wherein: the display unit (4) is a high-definition electronic screen display.
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