CN116565267B - Large-scale all-vanadium redox flow energy storage battery system - Google Patents
Large-scale all-vanadium redox flow energy storage battery system Download PDFInfo
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- CN116565267B CN116565267B CN202310236127.2A CN202310236127A CN116565267B CN 116565267 B CN116565267 B CN 116565267B CN 202310236127 A CN202310236127 A CN 202310236127A CN 116565267 B CN116565267 B CN 116565267B
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 138
- 238000004146 energy storage Methods 0.000 title claims abstract description 134
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000012937 correction Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 62
- 239000003792 electrolyte Substances 0.000 claims description 36
- 239000000523 sample Substances 0.000 claims description 22
- 238000012544 monitoring process Methods 0.000 claims description 13
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
- H01M8/04365—Temperature; Ambient temperature of other components of a fuel cell or fuel cell stacks
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Abstract
The invention relates to the technical field of all-vanadium redox flow energy storage batteries, in particular to a large-scale all-vanadium redox flow energy storage battery system. The power supply device comprises a power input end and a central control unit, wherein the power input end is connected with N parallel branches through a power collector, a circuit breaker is fixedly arranged at the joint of the power input end and the power collector, and each branch comprises: the M all-vanadium redox flow battery units which are mutually connected in series, and the environment acquisition module, the SOC acquisition module, the self-checking module and the real-time power correction module are all installed in each all-vanadium redox flow battery unit. The beneficial effects of the invention are as follows: through the setting of environment collection module, SOC collection module, self-checking module and real-time power correction mould, make this device can accomplish the large-scale operation of filling of full vanadium redox flow energy storage battery high-efficiently, and this device can carry out intelligent and the real-time compensation regulation of filling the energy power according to the environmental condition, the operating condition and the loss operating condition of each full vanadium redox flow battery unit when filling the energy operation.
Description
Technical Field
The invention relates to the technical field of all-vanadium redox flow energy storage batteries, in particular to a large-scale all-vanadium redox flow energy storage battery system.
Background
The all-vanadium redox flow battery is a novel green environment-friendly energy storage battery, has the advantages of high-current charge and discharge resistance, easy capacity adjustment, capability of realizing instant charge, long service life and the like, has wide prospect in the aspect of fixed energy storage, and draws attention of a plurality of research institutions and energy enterprises.
Because the vanadium battery is an electrochemical reaction device, the working state of the vanadium battery is greatly changed, raw materials and auxiliary materials contain toxic chemical substances, in order to meet the requirement of a load on battery power, a power supply with stable load performance is provided, the temperature, pressure, flow, liquid level of a liquid storage tank and the like of a reaction electrolyte of the battery are required to be directly controlled in real time, the reliable and effective operation of the vanadium battery can be ensured, the operation of a battery stack is safe, and in the working process of the all-vanadium redox flow energy storage battery, an associated battery control system is required to be utilized to realize the energy storage control of the all-vanadium redox flow energy storage battery.
In the prior art, a patent document with publication number of CN102487148B discloses a large-scale all-vanadium redox flow energy storage battery system, a control method and application thereof, and the invention establishes a flexible system of the large-scale all-vanadium redox flow energy storage battery through the coupling design of all-vanadium redox flow energy storage battery unit systems, so as to realize the requirements of different power and different capacity of the large-scale all-vanadium redox flow energy storage battery system, and facilitate prolonging the service life of battery modules and electrolyte.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a large-scale all-vanadium redox flow energy storage battery system to solve the problems that the existing battery energy storage system cannot carry out intelligent and real-time compensation adjustment on the charging power according to the environmental working condition, the using working condition and the loss working condition of a battery, and then the charging efficiency and the service life of the energy storage system are lower.
The technical scheme for solving the technical problems is as follows: the utility model provides an all vanadium redox flow energy storage battery system on a large scale, includes electric energy input and well accuse unit respectively, the electric energy input is connected with N branch road that connects in parallel through power harvester, the fixed circuit breaker that is provided with in junction of electric energy input and power harvester, every branch road includes respectively: and the M all-vanadium redox flow battery units which are mutually connected in series, and an environment acquisition module, an SOC acquisition module, a self-checking module and a real-time power correction module are all arranged in each all-vanadium redox flow battery unit.
The beneficial effects of the invention are as follows:
through setting up of environment collection module, SOC collection module, self-checking module and real-time power correction mould, make this device can accomplish the large-scale operation of filling of full vanadium redox flow battery high-efficiently, and this device is when filling can the operation, can carry out the intelligent and the real-time compensation regulation of filling the power according to the environment operating mode, the operating mode and the loss operating mode of each full vanadium redox flow battery unit, through the realization of above-mentioned intelligence and real-time compensation regulation function, thereby effectively improve full vanadium redox flow battery unit's filling efficiency and life.
On the basis of the technical scheme, the invention can be improved as follows.
Further, each all vanadium redox flow battery unit comprises an anode electrolyte storage tank, a cathode electrolyte storage tank, a circulating pump, a valve and an all vanadium redox flow energy storage battery module, a power regulator is arranged at a circuit port of the all vanadium redox flow energy storage battery module, the anode electrolyte storage tank is communicated with an anode electrolyte inlet of the all vanadium redox flow energy storage battery module through a first liquid outlet pipe, and an outlet end of anode electrolyte of the all vanadium redox flow energy storage battery module is communicated with the anode electrolyte storage tank through a first liquid return pipe.
Further, the environment acquisition module comprises an air pressure probe, a temperature probe and a liquid level probe which are respectively arranged in the positive electrolyte storage tank and the negative electrolyte storage tank;
liquid outlet flow sensors are arranged at the liquid outlet positions of the first liquid outlet pipe and the second liquid outlet pipe;
liquid outlet positions of the first liquid return pipe and the second liquid return pipe are respectively provided with a liquid return flow sensor.
Further, the power collector collects current input value and voltage input value of the electric energy input end and total input power P of the electric energy input end in real time;
the power regulator collects current input values and voltage input values of the all-vanadium redox flow energy storage battery module in real time and regulates the current input values and the voltage input values;
and the power regulator measures the input power of the all-vanadium redox flow energy storage battery module in real time.
Further, N is greater than or equal to 2, and M is greater than or equal to 2.
Further, the central control unit receives data feedback from the SOC acquisition module, the self-checking module, the power acquisition device a and the power acquisition device b in real time, and the central control unit controls the working states of the circulating pump and the power regulator according to the data feedback of the SOC acquisition module, the environment acquisition module and the power acquisition device a;
when the electric energy input end outputs power, the central control unit controls the power regulator in each all-vanadium redox flow energy storage battery module to regulate the input power of each all-vanadium redox flow energy storage battery module.
Further, the self-checking module receives data feedback of the environment acquisition module in real time, and a temperature high-temperature alarm threshold, a temperature low-temperature alarm threshold, a flow difference alarm threshold, a liquid level alarm threshold, a barometric low-pressure alarm threshold and a barometric high-pressure alarm threshold are preset in the self-checking module respectively;
the self-checking module measures the flow difference value of the liquid outlet flow sensor and the liquid flow sensor in real time, and when the flow difference value is higher than a flow difference alarm threshold value, the self-checking module sends an alarm signal to the central control unit;
when the monitoring value of the temperature probe is lower than the low temperature alarm threshold or higher than the high temperature alarm threshold, the self-checking module sends an alarm signal to the central control unit;
when the monitoring value of the air pressure probe is lower than the air pressure low-pressure alarm threshold or the monitoring value of the air pressure probe is higher than the air pressure high-pressure alarm threshold, the self-checking module sends an alarm signal to the central control unit;
when the monitoring value of the liquid level probe is lower than the liquid level alarm threshold, the self-checking module sends an alarm signal to the central control unit;
after the central control unit receives the alarm signal from the self-checking module, the central control unit closes the all-vanadium redox flow energy storage battery module for generating the alarm signal;
when the alarm signal disappears, the central control unit recovers the starting of the all-vanadium redox flow energy storage battery module with the alarm signal disappeared.
Further, after the all-vanadium redox flow energy storage battery module is started, an S0C acquisition module acquires an initial SOC value of the all-vanadium redox flow energy storage battery module;
after the initial SOC values of all the vanadium redox flow energy storage battery modules are acquired, the SOC acquisition module performs data arrangement on the initial SOC values of all the vanadium redox flow energy storage battery modules from large to small, after the data arrangement, the SOC acquisition module takes the acquired maximum SOC value as an SOC reference value, and after the SOC reference value is established, the all the vanadium redox flow energy storage battery modules enter a pre-energy storage mode;
in a pre-energy storage mode, the power regulator charges each all-vanadium redox flow energy storage battery module rapidly with the sustainable maximum power of the all-vanadium redox flow energy storage battery module, and when the SOC real-time value of each all-vanadium redox flow energy storage battery module reaches an SOC reference value, the all-vanadium redox flow energy storage battery module is switched into a middle energy storage mode;
in the medium energy storage mode, the energy storage system firstly presets a standard reference calculation time T, after the reference calculation time T is established, the energy storage system carries out rapid energy charging operation with rated maximum power in each all-vanadium redox flow energy storage battery module, after the energy charging time T, each all-vanadium redox flow energy storage battery module has an SOC real-time calculation value, and after each SOC is acquired in real time, the SOC acquisition module calculates the SOC acceleration ratio VS of each all-vanadium redox flow energy storage battery module in unit time in real time;
vs= (SOC real-time calculation value-SOC reference value)/T
After VC values of all vanadium redox flow energy storage battery modules are measured, the energy storage system enters a post energy storage mode;
in the rear energy storage mode, the central control unit counts the total number L of all-vanadium redox flow energy storage battery modules generating alarm signals in real time;
the real-time power correction module corrects the input power of each all-vanadium redox flow energy storage battery module in real time according to the data feedback of the SOC acquisition module and the central control unit and generates a corrected power value SP input into each all-vanadium redox flow energy storage battery module;
SP＝P/(M-L)*VS
in the rear energy storage mode, the SP value is updated in real time;
and when the SOC values of all the vanadium redox flow energy storage battery modules reach full values, the circuit breaker automatically opens.
Furthermore, each vanadium redox flow energy storage battery module has a calibrated maximum energy storage power BP, and when BP is more than or equal to SP, the vanadium redox flow energy storage battery modules perform energy charging operation with the calibrated maximum energy storage power BP.
Drawings
FIG. 1 is a schematic block diagram of a large-scale all-vanadium redox flow energy storage battery system of the present invention;
FIG. 2 is a schematic block diagram of an all-vanadium redox flow battery unit of the present invention;
fig. 3 is a schematic structural diagram of an all-vanadium redox flow battery unit of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. an electrical energy input; 2. a central control unit; 3. a power harvester; 4. a circuit breaker; 5. an all-vanadium redox flow battery unit; 6. an environment collection module; 7. an SOC acquisition module; 8. a self-checking module; 9. a real-time power correction module; 10. an anode electrolyte storage tank; 11. a negative electrode electrolyte storage tank; 12. a circulation pump; 13. a valve; 14. an all-vanadium redox flow energy storage battery module; 15. a power regulator.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
The present invention provides the following preferred embodiments
As shown in fig. 1-3, a large-scale all-vanadium redox flow energy storage battery system respectively comprises an electric energy input end 1 and a central control unit 2, wherein the electric energy input end 1 is connected with N parallel branches through a power collector 3, and N is 10;
the power collector 3 collects the current input value and the voltage input value of the electric energy input end 1 and the input total power P of the electric energy input end 1 in real time;
a breaker 4 is fixedly arranged at the joint of the electric energy input end 1 and the power collector 3;
the circuit breaker 4 is used for cutting off the communication between the electric energy input end 1 and the branch circuit;
each branch circuit respectively comprises: the M all-vanadium redox flow battery units 5 which are mutually connected in series are internally provided with an environment acquisition module 6, an SOC acquisition module 7, a self-checking module 8 and a real-time power correction module 9,M which are 10;
each all-vanadium redox flow battery unit 5 comprises a positive electrode electrolyte storage tank 10, a negative electrode electrolyte storage tank 11, a circulating pump 12, a valve 13 and an all-vanadium redox flow energy storage battery module 14, and a power regulator 15 is arranged at a circuit port of the all-vanadium redox flow energy storage battery module 14;
the power regulator 15 collects and regulates the current input value and the voltage input value of the all-vanadium redox flow energy storage battery module 14 in real time, and the power regulator 15 measures the input power of the all-vanadium redox flow energy storage battery module 14 in real time;
the positive electrolyte storage tank 10 is communicated with a positive electrolyte inlet of the all-vanadium redox flow energy storage battery module 14 through a first liquid outlet pipe, and an outlet end of positive electrolyte of the all-vanadium redox flow energy storage battery module 14 is communicated with the positive electrolyte storage tank 10 through a first liquid return pipe.
The environment acquisition module 6 comprises an air pressure probe, a temperature probe and a liquid level probe which are respectively arranged in the positive electrolyte storage tank 10 and the negative electrolyte storage tank 11;
liquid outlet flow sensors are arranged at the liquid outlet positions of the first liquid outlet pipe and the second liquid outlet pipe;
liquid outlet positions of the first liquid return pipe and the second liquid return pipe are respectively provided with a liquid return flow sensor.
The air pressure probe is used for monitoring the airtight maintenance degree of the positive electrode electrolyte storage tank 10 and the negative electrode electrolyte storage tank 11;
the central control unit 2 can calculate the pipeline blockage degree of the first liquid outlet pipe, the second liquid outlet pipe, the first liquid return pipe or the second liquid return pipe by calculating the flow difference of the liquid outlet flow sensor and the liquid return flow sensor, so as to assist in detecting whether the vanadium redox flow battery unit 5 can continuously and stably operate;
the central control unit 2 receives data feedback from the SOC acquisition module 7, the self-checking module 8, the power collector 3a and the power collector 3b in real time, and the central control unit 2 controls the working states of the circulating pump 12 and the power regulator 15 according to the data feedback of the SOC acquisition module 7, the environment acquisition module 6 and the power collector 3 a;
when the electric energy input end 1 outputs power, the central control unit 2 controls the power regulator 15 in each all-vanadium redox flow energy storage battery module 14 to regulate the input power of each all-vanadium redox flow energy storage battery module 14.
The self-checking module 8 receives data feedback of the environment acquisition module 6 in real time, and a temperature high-temperature alarm threshold, a temperature low-temperature alarm threshold, a flow quantity difference alarm threshold, a liquid level alarm threshold, a barometric low-pressure alarm threshold and a barometric high-pressure alarm threshold are respectively preset in the self-checking module 8;
the self-checking module 8 measures the flow difference value of the liquid outlet flow sensor and the liquid return flow sensor in real time, and when the flow difference value is higher than the flow difference alarm threshold value, the self-checking module 8 sends an alarm signal to the central control unit 2;
when the monitoring value of the temperature probe is lower than the low temperature alarm threshold or higher than the high temperature alarm threshold, the self-checking module 8 sends an alarm signal to the central control unit 2;
when the monitoring value of the air pressure probe is lower than the air pressure low-pressure alarm threshold or the monitoring value of the air pressure probe is higher than the air pressure high-pressure alarm threshold, the self-checking module 8 sends an alarm signal to the central control unit 2;
when the monitoring value of the liquid level probe is lower than the liquid level alarm threshold value, the self-checking module 8 sends an alarm signal to the central control unit 2;
after the central control unit 2 receives the alarm signal from the self-checking module 8, the central control unit 2 closes the all-vanadium redox flow energy storage battery module 14 generating the alarm signal;
when the alarm signal disappears, the central control unit 2 recovers the starting of the all-vanadium redox flow energy storage battery module 14 with the alarm signal disappeared.
After the all-vanadium redox flow energy storage battery module 14 is started, an S0C acquisition module acquires an initial SOC value of the all-vanadium redox flow energy storage battery module 14;
after the initial SOC values of all the vanadium redox flow energy storage battery modules 14 are acquired, the SOC acquisition module 7 performs data arrangement on the initial SOC values of all the vanadium redox flow energy storage battery modules 14 from large to small, after the data arrangement, the SOC acquisition module 7 takes the acquired maximum SOC value as an SOC reference value, and after the SOC reference value is established, the all the vanadium redox flow energy storage battery modules 14 enter a pre-energy storage mode;
in the pre-energy storage mode, the power regulator 15 charges each all-vanadium redox flow battery module 14 rapidly with the sustainable maximum power of the all-vanadium redox flow battery module 14, and when the SOC real-time value of each all-vanadium redox flow battery module 14 reaches the SOC reference value, the all-vanadium redox flow battery module 14 shifts to the medium-energy storage mode;
in the medium energy storage mode, the energy storage system firstly presets a standard reference calculation time T, after the reference calculation time T is established, the energy storage system carries out rapid energy charging operation with rated maximum power into each all-vanadium redox flow energy storage battery module 14, after the energy charging time T, each all-vanadium redox flow energy storage battery module 14 has an SOC real-time calculation value, and after each SOC is real-time to acquisition, the SOC acquisition module 7 calculates the SOC acceleration ratio VS of each all-vanadium redox flow energy storage battery module 14 in unit time in real time;
vs= (SOC real-time calculation value-SOC reference value)/T
After the VS value of each all-vanadium redox flow energy storage battery module 14 is measured, the energy storage system enters a post energy storage mode;
in the rear energy storage mode, the central control unit 2 counts the total number L of all-vanadium redox flow energy storage battery modules 14 for generating alarm signals in real time;
the real-time power correction module 9 corrects the input power of each all-vanadium redox flow energy storage battery module 14 in real time according to the data feedback of the SOC acquisition module 7 and the central control unit 2 and generates a corrected power value SP input into each all-vanadium redox flow energy storage battery module 14;
SP＝P/(M-L)*VS
in the rear energy storage mode, the SP value is updated in real time;
when the SOC value of each all-vanadium redox flow battery module 14 reaches the full value, the circuit breaker 4 automatically opens.
Each all-vanadium redox flow battery module 14 has a calibrated maximum stored energy power BP, and when BP is greater than or equal to SP, the all-vanadium redox flow battery module 14 performs charging operation with the calibrated maximum stored energy power BP.
To sum up: the beneficial effects of the invention are embodied in that
Through setting up of environment collection module, SOC collection module, self-checking module and real-time power correction mould, make this device can accomplish the large-scale operation of filling of full vanadium redox flow battery high-efficiently, and this device is when filling can the operation, can carry out the intelligent and the real-time compensation regulation of filling the power according to the environment operating mode, the operating mode and the loss operating mode of each full vanadium redox flow battery unit, through the realization of above-mentioned intelligence and real-time compensation regulation function, thereby effectively improve full vanadium redox flow battery unit's filling efficiency and life.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (5)
1. The utility model provides a full vanadium redox flow energy storage battery system on a large scale, its characterized in that includes electric energy input (1) and well accuse unit (2) respectively, electric energy input (1) are connected with N parallelly connected branch road through power collector (3), electric energy input (1) are fixed with in junction of power collector (3) and are provided with circuit breaker (4), every branch road includes respectively: the system comprises M all-vanadium redox flow battery units (5) which are mutually connected in series, wherein an environment acquisition module (6), an SOC acquisition module (7), a self-checking module (8) and a real-time power correction module (9) are arranged in each all-vanadium redox flow battery unit (5);
each all-vanadium redox flow battery unit (5) comprises a positive electrolyte storage tank (10) and a negative electrolyte storage tank (11), wherein the positive electrolyte storage tanks (10) are communicated with a positive electrolyte inlet of an all-vanadium redox flow energy storage battery module (14) through a first liquid outlet pipe, and an outlet end of positive electrolyte of the all-vanadium redox flow energy storage battery module (14) is communicated with the positive electrolyte storage tanks (10) through a first liquid return pipe;
the negative electrode electrolyte storage tank (11) is communicated with a negative electrode electrolyte inlet of the all-vanadium liquid flow energy storage battery module (14) through a second liquid outlet pipe, an outlet end of negative electrode electrolyte of the all-vanadium liquid flow energy storage battery module (14) is communicated with the negative electrode electrolyte storage tank (11) through a second liquid return pipe, and circulating pumps (12) and valves (13) are respectively arranged in the middle parts of the first liquid outlet pipe and the second liquid outlet pipe;
the environment acquisition module (6) comprises an air pressure probe, a temperature probe and a liquid level probe which are respectively arranged in the positive electrode electrolyte storage tank (10) and the negative electrode electrolyte storage tank (11);
liquid outlet flow sensors are arranged at the liquid outlet positions of the first liquid outlet pipe and the second liquid outlet pipe;
liquid outlet positions of the first liquid return pipe and the second liquid return pipe are respectively provided with a liquid return flow sensor;
n is greater than or equal to 2, M is greater than or equal to 2;
the self-checking module (8) receives data feedback of the environment acquisition module (6) in real time, and a temperature high-temperature alarm threshold, a temperature low-temperature alarm threshold, a flow quantity difference alarm threshold, a liquid level alarm threshold, a barometric low-pressure alarm threshold and a barometric high-pressure alarm threshold are respectively preset in the self-checking module (8);
the self-checking module (8) measures the flow difference value of the liquid outlet flow sensor and the liquid return flow sensor in real time, and when the flow difference value is higher than a flow difference alarm threshold value, the self-checking module (8) sends an alarm signal to the central control unit (2);
when the monitoring value of the temperature probe is lower than the low temperature alarm threshold or higher than the high temperature alarm threshold, the self-checking module (8) sends an alarm signal to the central control unit (2);
when the monitoring value of the air pressure probe is lower than the air pressure low-pressure alarm threshold or the monitoring value of the air pressure probe is higher than the air pressure high-pressure alarm threshold, the self-checking module (8) sends an alarm signal to the central control unit (2);
when the monitoring value of the liquid level probe is lower than the liquid level alarm threshold value, the self-checking module (8) sends an alarm signal to the central control unit (2);
after the central control unit (2) receives the alarm signal from the self-checking module (8), the central control unit (2) closes the all-vanadium redox flow energy storage battery module (14) for generating the alarm signal;
when the alarm signal disappears, the central control unit (2) recovers the starting of the all-vanadium redox flow energy storage battery module (14) with the alarm signal disappeared; after the all-vanadium redox flow energy storage battery module (14) is started, an S0C acquisition module acquires an initial SOC value of the all-vanadium redox flow energy storage battery module (14);
after the initial SOC value of each all-vanadium redox flow energy storage battery module (14) is acquired, the SOC acquisition module (7) performs data arrangement on the initial SOC value of each all-vanadium redox flow energy storage battery module (14) from large to small, after the data arrangement, the SOC acquisition module (7) takes the acquired maximum SOC value as an SOC reference value, and after the SOC reference value is established, the all-vanadium redox flow energy storage battery module (14) enters a pre-energy storage mode;
in a pre-energy storage mode, the power regulator (15) charges each all vanadium redox flow energy storage battery module (14) rapidly with the sustainable maximum power of the all vanadium redox flow energy storage battery module (14), and when the SOC real-time value of each all vanadium redox flow energy storage battery module (14) reaches the SOC reference value, the all vanadium redox flow energy storage battery module (14) is switched into a middle energy storage mode;
in the medium energy storage mode, the energy storage system firstly presets a standard reference calculation time T, after the reference calculation time T is established, the energy storage system carries out quick energy charging operation with rated maximum power in each all-vanadium redox flow energy storage battery module (14), after the energy charging time T, each all-vanadium redox flow energy storage battery module (14) has an SOC real-time calculation value, and after each SOC real-time calculation value is acquired, an SOC acquisition module (7) calculates an SOC acceleration ratio VS in unit time of each all-vanadium redox flow energy storage battery module (14) in real time;
vs= (SOC real-time calculation value-SOC reference value)/T
After the VS value of each all-vanadium redox flow energy storage battery module (14) is measured, the energy storage system enters a post energy storage mode;
in the rear energy storage mode, the central control unit (2) counts the total number L of all-vanadium redox flow energy storage battery modules (14) generating alarm signals in real time;
the real-time power correction module (9) corrects the input power of each all-vanadium redox flow energy storage battery module (14) in real time according to the data feedback of the SOC acquisition module (7) and the central control unit (2) and generates a corrected power value SP input into each all-vanadium redox flow energy storage battery module (14);
SP＝P/（M-L）*VS
wherein P is the total input power of the electric energy input end (1);
in the rear energy storage mode, the SP value is updated in real time;
and when the SOC values of all the vanadium redox flow energy storage battery modules (14) reach full values, the circuit breaker (4) automatically opens.
2. The large-scale all-vanadium redox flow battery system according to claim 1, wherein each all-vanadium redox flow battery unit (5) comprises a positive electrolyte storage tank (10), a negative electrolyte storage tank (11), a circulating pump (12), a valve (13) and an all-vanadium redox flow battery module (14), and a power regulator (15) is installed at a circuit port of the all-vanadium redox flow battery module (14).
3. The large-scale all-vanadium redox flow battery system of claim 2, wherein the power harvester (3) collects the current input value, the voltage input value of the electric energy input end (1) and the input total power P of the electric energy input end (1) in real time;
the power regulator (15) collects current input values and voltage input values of the all-vanadium redox flow energy storage battery module (14) in real time and regulates the current input values and the voltage input values;
the power regulator (15) measures the input power of the all-vanadium redox flow energy storage battery module (14) in real time.
4. The large-scale all-vanadium redox flow battery system according to claim 2, wherein the central control unit (2) receives data feedback from the SOC acquisition module (7), the self-checking module (8) and the power collector (3) in real time, and the central control unit (2) controls the working states of the circulating pump (12) and the power regulator (15) according to the data feedback from the SOC acquisition module (7), the environment acquisition module (6) and the power collector (3);
when the electric energy input end (1) outputs power, the central control unit (2) controls the power regulator (15) in each all-vanadium redox flow energy storage battery module (14) to regulate the input power of each all-vanadium redox flow energy storage battery module (14).
5. The large-scale all-vanadium redox flow battery system of claim 1, wherein each of said all-vanadium redox flow battery modules (14) has a nominal maximum power BP, and when BP is greater than or equal to SP, the all-vanadium redox flow battery module (14) performs charging operations with the nominal maximum power BP.
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| WO2017156680A1 (en) * | 2016-03-14 | 2017-09-21 | 大连融科储能技术发展有限公司 | Flow battery regulation and control method, regulation and control system thereof, and flow battery |
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| CN103187750A (en) * | 2011-12-31 | 2013-07-03 | 中国电力科学研究院 | Megawatt battery energy storage power station real-time power control method and system thereof |
| CN103187733A (en) * | 2011-12-31 | 2013-07-03 | 中国电力科学研究院 | Megawatt liquid flow battery energy storage power station real-time power control method and system thereof |
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