CN105978008B - A flow battery energy storage system with black start function of wind field and its working method - Google Patents

Abstract

The invention discloses a flow battery energy storage system with a wind field black start function and a working method thereof, wherein the flow battery energy storage system comprises: a flow battery system; a first transformer; the energy storage inverter is connected with the flow battery system and the first transformer; a battery management system; the energy management system is connected with the battery management system, the energy storage inverter and the first bus; after the energy management system knows that the first bus is powered off, judging whether the current battery SOC of the redox flow battery system fed back by the battery management system meets a certain preset condition, and issuing a control instruction for entering a black start mode according to a judgment result that the current battery SOC of the redox flow battery system meets the certain preset condition; the invention can supply power to the unit without starting capability and part of loads of the wind field through the flow battery system under the condition that the power transmission recovery of other power grids cannot be relied on after the whole wind field is power-off and shutdown, thereby gradually expanding the recovery range of the system.

Description

A flow battery energy storage system with black start function of wind field and its working method

technical field

The invention relates to the technical field of liquid flow batteries, in particular to a flow battery energy storage system with a wind field black start function and a working method thereof.

Background technique

Liquid flow battery has the advantages of flexible design (power and capacity can be independently designed), long service life, good charge and discharge performance, free site selection, high energy efficiency, safety and environmental protection, low maintenance cost, and easy realization of large-scale storage. Many advantages not available. In practical applications, liquid flow batteries can be widely used in renewable energy power generation systems such as wind energy and solar energy as energy storage systems, so that the generated electricity can be output continuously and stably; The power in low valleys is stored and output during peak power consumption to balance power supply and demand; in addition, it can also be used as an emergency power system and backup power station, etc., which is considered to be one of the most promising energy storage technologies for commercialization.

As a new energy source, wind energy has been widely used at present. However, for wind farms equipped only with wind turbines, after the entire power grid system is powered off due to a fault, the wind turbines without self-starting capability cannot In the case of power grid recovery, it will not work normally, thus limiting the large-scale application of wind power generation equipment. In order to effectively prevent similar situations, it is necessary for the corresponding equipment of the wind power plant to be able to "black start" to independently and reliably supply power to the load. Black start refers to the start-up of units with self-starting ability to drive units without self-starting ability, and then gradually expand the recovery range of the system. The black starting power supply in the prior art mainly includes the following types: 1) diesel generator; 2) gas turbine; 3) UPS uninterruptible power supply. But for diesel generators, it needs to consume fossil fuels, which is not clean and environmentally friendly; for gas turbines, its equipment is complicated, installation and construction are complicated, and maintenance costs are high; UPS charging time is limited by its capacity and cost, and cannot meet long-term requirements. Conditions for black start under no power condition.

Contents of the invention

In view of the above problems, the present invention develops a flow battery energy storage system with a black-start function of a wind field and a working method thereof.

Technical means of the present invention is as follows:

A liquid flow battery energy storage system with a black start function of a wind field, the wind field includes a first bus, a second bus, a main transformer between the first bus and the second bus, and a power transformer connected to the first bus A plurality of fan lines, the liquid flow battery energy storage system includes:

A flow battery system; the flow battery system includes an electric stack, a positive electrode liquid storage tank, a negative electrode liquid storage tank, a circulation pump, and an electrolyte circulation line;

a first transformer connected to the first bus;

An energy storage inverter connected to the flow battery system and the first transformer; the energy storage inverter inverts the direct current output from the flow battery system and then boosts the voltage through the first transformer and outputs it to the The first bus bar, and after the AC power on the first bus bar is stepped down by the first transformer, it is rectified and output by the energy storage inverter to charge the flow battery system;

A battery management system connected to the flow battery system; the battery management system is used to monitor the operating state of the flow battery system and obtain operating parameters; the operating parameters include at least battery SOC;

An energy management system connected to the battery management system, the energy storage inverter, and the first bus; after the energy management system learns that the first bus is powered off, the current battery SOC of the flow battery system fed back to the battery management system Whether it meets certain preset conditions is judged, and according to the judgment result that the current battery SOC of the flow battery system meets certain preset conditions, a control command to enter the black start mode is issued; after the energy management system issues a control command to enter the black start mode, all The energy storage inverter is changed from the PQ control mode to the V/F control mode, and the output voltage is adjusted so that the voltage obtained after the first transformer is boosted meets the power quality requirements stipulated in the national power quality standard;

Further, the energy management system is connected to the energy storage inverter and the flow battery system through an on-site monitoring system; the operating parameters also include the battery voltage; a control command to enter the black start mode is issued under the energy management system Afterwards, the on-site monitoring system starts the flow battery system according to the control command issued by the energy management system to enter the black start mode, and the energy management system checks whether the current battery voltage of the flow battery system fed back by the battery management system is greater than or equal to the preset voltage. Judgment, if yes, the energy storage inverter is changed from the PQ control mode to the V/F control mode, and the output voltage is adjusted so that the voltage obtained after the boost of the first transformer meets the power quality requirements stipulated in the national power quality standard; otherwise, the energy management The system continues to judge whether the current battery voltage of the flow battery system fed back by the battery management system is greater than or equal to the preset voltage;

Further, after the energy storage inverter adjusts the output voltage so that the voltage obtained after the boost of the first transformer meets the power quality requirements stipulated in the national power quality standard, any wind turbine in the wind turbine line is started; The wind generator is connected with a control device; the control device detects the current first bus voltage, and judges whether the current first bus voltage is normal, and if so, controls the wind generator to perform power-limited operation; otherwise, the control device continues make the above judgment;

Further, there are at least two liquid flow battery systems, and they are mutually backed up; the first transformer has two primary coils; each liquid flow battery system communicates with the first transformer through an energy storage inverter. A primary coil is connected; when any of the running liquid flow battery systems fails, another flow battery system as a backup starts and runs;

Further, the liquid flow battery energy storage system also includes a UPS and a second transformer connected to the first bus; when the first bus is not powered off, the second transformer converts the voltage of the first bus and outputs electric energy for energy management system, liquid flow battery system, energy storage inverter, on-site monitoring system and battery management system to provide working power. When the first bus is powered off, the UPS will supply the energy management system, liquid flow battery The controller, on-site monitoring system and battery management system provide working power;

In addition, the wind farm also includes multiple load lines connected to the first bus, and the multiple load lines are divided into important load lines and non-important load lines according to the order of rank. , and then run the microgrid composed of the wind generator, the liquid flow battery system and the energy storage inverter, and after the microgrid voltage meets the power quality requirements stipulated in the national power quality standard, start each important load line;

Further, the power generated by the wind generator is lower than 80% of the rated power of the flow battery.

A working method of a liquid flow battery energy storage system with a wind field black start function as described above, comprising the following steps:

① The battery management system monitors the operating status of the flow battery system and obtains operating parameters, the operating parameters include at least the battery SOC, and executes ②;

②The energy management system judges whether the first bus is powered off, if yes, execute ③, otherwise return to ②;

③ The energy management system judges whether the current battery SOC of the flow battery system fed back by the battery management system meets certain preset conditions, and if so, execute ④, otherwise return to ②;

④ The energy management system issues a control command to enter the black start mode, and executes ⑤;

⑤ The energy storage inverter is changed from the PQ control mode to the V/F control mode, and the output voltage is adjusted so that the voltage obtained after the boost of the first transformer meets the power quality requirements stipulated in the national power quality standards;

Further, the operating parameters also include the battery voltage; the working method also has the following steps between step ④ and step ⑤:

Start the flow battery system;

The energy management system judges whether the current battery voltage of the flow battery system fed back by the battery management system is greater than or equal to the preset voltage. The preset voltage continues to judge;

Further, the working method also has the following steps after step 5.:

start any wind generator in the fan line;

The control device detects the current first bus voltage and judges whether the current first bus voltage is normal, and if so, controls the wind turbine to perform power-limited operation; otherwise, continues to judge whether the current first bus voltage is normal.

Due to the adoption of the above technical solution, the present invention provides a liquid flow battery energy storage system with a black start function for wind farms and its working method, which can restore power when the entire wind farm loses power and cannot rely on other grids for power transmission. Under certain conditions, the flow battery system can directly supply power to the units and partial loads in the wind farm without starting capability, and then gradually expand the recovery range of the wind power system step by step, and finally realize the restoration of the power supply of the entire wind farm system; since there is no need to configure additional diesel generators There is no need to improve the energy storage system and structure of the wind field. Compared with the existing technology, the system has simple structure, greatly reduced cost, and fast start-up speed. The energy storage system A series of advantages such as high utilization rate.

Description of drawings

Fig. 1 is a schematic structural view of the flow battery energy storage system of the present invention;

Fig. 2 is the structural representation of wind field example of the present invention;

Fig. 3 is a schematic diagram of the connection among the energy management system, the on-site monitoring system, the battery management system, the energy storage inverter and the flow battery system of the present invention;

Fig. 4 is the flowchart of working method described in the present invention;

In the figure: 1. First busbar, 2. First transformer, 3. Energy storage inverter, 4. Liquid flow battery system, 5. Second transformer, 6. UPS, 7. Second busbar, 8, No. 1 Fan line, No. 9, No. 2 fan line, No. 10, No. 3 fan line, 11, main transformer, 12, No. 1 load line, 13, No. 2 load line, 14, PT line, 15, SVG line.

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, a liquid flow battery energy storage system with a black start function of a wind field, the wind field includes a first bus 1, a second bus 7, a first bus 1 and a second The main transformer 11 between the busbars 7 and a plurality of fan lines connected to the first busbar 1, the liquid flow battery energy storage system includes: a liquid flow battery system 4; the liquid flow battery system 4 includes an electric stack, Positive electrode liquid storage tank, negative electrode liquid storage tank, circulation pump and electrolyte circulation pipeline; first transformer 2 connected to the first bus bar 1; connected to the flow battery system 4 and the first transformer 2 A connected energy storage inverter 3; the energy storage inverter 3 inverts the DC power output by the flow battery system 4 and then boosts the voltage through the first transformer 2 and outputs it to the first bus bar 1, and converts the first The alternating current on the bus 1 is stepped down by the first transformer 2 and then rectified by the energy storage inverter 3 to charge the flow battery system 4; the battery management system connected to the flow battery system 4; the The battery management system is used to monitor the operating state of the liquid flow battery system 4 and obtain operating parameters; the operating parameters include at least the battery SOC; the energy connected to the battery management system, the energy storage inverter 3 and the first bus 1 management system; the energy management system judges whether the current battery SOC of the flow battery system 4 fed back by the battery management system satisfies certain preset conditions after learning that the first bus 1 is powered off, and according to the current battery SOC of the flow battery system 4 The judgment result that the SOC satisfies certain preset conditions issues a control command to enter the black start mode; after the energy management system issues the control command to enter the black start mode, the energy storage inverter 3 changes from the PQ control mode to the V/F control mode mode, and adjust the output voltage so that the voltage obtained after the boost of the first transformer 2 meets the power quality requirements stipulated in the national power quality standards; furthermore, the energy management system is connected to the energy storage inverter through an on-site monitoring system 3 and the liquid flow battery system 4; the operating parameters also include the battery voltage; after the energy management system issues a control command to enter the black start mode, the on-site monitoring system issues a control command to enter the black start mode according to the energy management system Start the flow battery system 4, and the energy management system judges whether the current battery voltage of the flow battery system 4 fed back by the battery management system is greater than or equal to the preset voltage, and if so, the energy storage inverter 3 changes from the PQ control mode to V /F control mode, and adjust the output voltage so that the voltage obtained after the boost of the first transformer 2 meets the power quality requirements stipulated in the national power quality standard, otherwise the energy management system will check whether the current battery voltage of the flow battery system fed back by the battery management system is It is greater than or equal to the preset voltage and continue to judge; further, after the energy storage inverter 3 adjusts the output voltage so that the voltage obtained after the first transformer 2 is boosted meets the power quality requirements stipulated in the national power quality standard, the Any wind generator in the fan line is started; the wind generator is connected with a control device; the control device detects the current first bus voltage and judges whether the current first bus voltage is normal Usually, if yes, control the wind generator to perform power-limited operation; otherwise, the control device continues to make the above judgment; further, there are at least two of the flow battery systems 4, and they are mutually backup; the first transformer 2 has two primary coils; each liquid flow battery system 4 is connected to a primary coil of the first transformer 2 via an energy storage inverter 3; when any running liquid flow battery system 4 fails , as a backup, another flow battery system starts and runs; further, the flow battery energy storage system also includes a UPS6 and a second transformer 5 connected to the first bus 1; the first bus 1 is not powered off , the second transformer 5 converts the voltage of the first bus 1 and outputs electric energy to provide working power for the energy management system, the liquid flow battery system 4, the energy storage inverter 3, the on-site monitoring system and the battery management system, and the first bus 1. When the power is cut off, the UPS6 provides working power for the energy management system, the liquid flow battery system 4, the energy storage inverter 3, the local monitoring system and the battery management system; in addition, the wind farm also includes the first The multiple load lines connected to the bus 1 are divided into important load lines and non-important load lines according to the order of rank. The micro-grid composed of the flow battery system 4 and the energy storage inverter 3, and after the micro-grid voltage meets the power quality requirements stipulated in the national power quality standard, each important load line is sequentially started in order of rank; further, the The wind turbines generate less than 80 percent of the flow battery's rated power.

As shown in Figures 1 to 4, a working method of a flow battery energy storage system with a wind field black start function as described above includes the following steps:

① The battery management system monitors the operating state of the flow battery system 4 and obtains operating parameters, the operating parameters include at least the battery SOC, and executes ②;

②The energy management system judges whether the first bus 1 is powered off, if yes, execute ③, otherwise return to ②;

③ The energy management system judges whether the current battery SOC of the flow battery system 4 fed back by the battery management system meets certain preset conditions, and if so, execute ④, otherwise return to ②;

④ The energy management system issues a control command to enter the black start mode, and executes ⑤;

⑤ The energy storage inverter 3 is changed from the PQ control mode to the V/F control mode, and the output voltage is adjusted so that the voltage obtained after the boost of the first transformer 2 meets the power quality requirements stipulated in the national power quality standards;

Further, the operating parameters also include the battery voltage; the working method also has the following steps between step ④ and step ⑤:

Start the flow battery system 4;

The energy management system judges whether the current battery voltage of the flow battery system 4 fed back by the battery management system is greater than or equal to the preset voltage. If it is greater than or equal to the preset voltage, continue to judge;

Further, the working method also has the following steps after step 5.:

start any wind generator in the fan line;

The control device detects the current voltage of the first bus 1 and judges whether the current voltage of the first bus 1 is normal, and if so, controls the wind turbine to perform power-limited operation; otherwise, continues to judge whether the current voltage of the first bus 1 is normal.

The wind field of the present invention also includes a PT line 14 and an SVG line 15 connected to the first bus 1; wherein, the load line includes loads in the wind field, wind box substations, emergency lighting, etc.; the PT line 14 is mainly used for checking the synchronization Or check for no voltage; the SVG line 15 mainly compensates system reactive power, provides power factor, maintains the voltage of the first bus 1, and strengthens the system voltage stability. The energy management system of the present invention judges whether the current battery SOC of the flow battery system fed back by the battery management system satisfies a certain preset condition after learning that the first bus 1 is powered off; the certain preset condition is >2%; The energy management system also judges whether the current battery voltage of the liquid flow battery system fed back by the battery management system is greater than or equal to a preset voltage, where the preset voltage is the working start voltage of the energy storage inverter 3; the electrolyte circulation The pipeline includes pipelines, electric valves, flow sensors, pressure sensors and temperature sensors installed on the pipelines. In the present invention, after the energy management system issues a control command to enter the black start mode, the energy storage inverter 3 is changed from the PQ control mode to the V/F control mode, and the output voltage is adjusted so that the first transformer 2 is boosted. The voltage meets the power quality requirements stipulated in the national power quality standard. In addition, after controlling the wind power generator to perform power-limited operation, then run the wind power generator, the liquid flow battery system 4 and the energy storage inverter 3. The microgrid, and after the microgrid voltage meets the power quality requirements stipulated in the national power quality standard, each important load line is started in sequence according to the order. The national power quality standard here can be "GB/T 12325-2008 power quality Power Supply Voltage Deviation" and "GB/T14549-1993 Power Quality Public Power Grid Harmonics", the present invention controls the wind power generator to perform power-limited operation, and then operates the wind power generator, liquid flow battery system 4 and energy storage The microgrid constituted by the inverter 3, the process of establishing and running the microgrid is briefly described below. When the wind speed exceeds the cut-in wind speed of the wind turbine, the pitch controller adjusts the pitch angle of the blades to start the wind turbine. When the speed of the wind generator is close to the synchronous speed, the excitation regulator works to provide excitation to the wind generator, adjust the excitation current to make the voltage of the wind generator close to the microgrid voltage, and the wind turbine converter detects whether the microgrid parameters meet and According to the grid conditions, adjust the parameters of the wind turbine to ensure the same frequency and voltage as the microgrid; after grid connection, gradually increase the grid-connected power of the wind turbine by adjusting the excitation current, and monitor the amplitude changes of the microgrid voltage and frequency , after the microgrid voltage is within a certain fluctuation range, the important load lines are started sequentially according to the order of levels; among them, the pitch controller, excitation regulator and fan converter are started after the control device judges that the current voltage of the first bus 1 is normal The control device judges whether the current voltage of the first bus 1 is normal, specifically, it can judge whether the frequency and phase of the current first bus voltage are consistent with the frequency and phase when the first bus voltage is normally powered, and judge the current first bus voltage Whether the amplitude is the voltage ± preset fluctuation range when the first bus is normally powered, the preset fluctuation range here can be 10%, and the flow battery system 4 of the present invention can have two, and they are mutually backed up, each The flow battery system 4 includes an electric stack, a positive electrode liquid storage tank, a negative electrode liquid storage tank, a circulation pump, and an electrolyte circulation pipeline; the circuits and liquid circuits of the two flow battery systems are independent of each other, and can be dispatched independently , when one of the flow battery systems fails, the other flow battery system can continue to operate, which improves the utilization rate of the energy storage system; the first transformer 2 can be a double-split transformer; the flow battery system 4 via The energy storage inverter 3 and the first transformer 2 are connected to the first bus 1; the MODBUS_TCP communication protocol is adopted between the energy management system and the on-site monitoring system, and between the on-site monitoring system and the battery management system; the on-site monitoring system and the CAN bus is used to realize communication between energy storage inverters 3; The control device is used to detect the amplitude, frequency and phase of the current first bus voltage, and to judge whether the amplitude, frequency and phase of the current first bus voltage are consistent with the amplitude, frequency and phase of the first bus voltage when it is normal, And when the amplitude, frequency and phase of the current first bus voltage are consistent with the amplitude, frequency and phase of the first bus voltage when it is normal, it is used to control the wind turbine to perform power-limited operation, when the current first bus voltage When the amplitude, frequency and phase are inconsistent with the amplitude, frequency and phase of the first bus voltage when it is normal, it is used to continue to check whether the amplitude, frequency and phase of the current first bus voltage are consistent with the amplitude, frequency and phase of the first bus voltage when it is normal. The frequency and phase are consistent to judge; the control device is connected to each fan circuit and the first bus 1; each fan circuit contains a wind generator.

The energy management system of the present invention not only knows whether the first bus 1 is powered off, but also detects whether the voltage on the AC side of the energy storage inverter 3 is zero, and detects whether the AC voltage on the high voltage side of the main transformer 11 is zero. After a bus 1 is powered off, the voltage on the AC side of the energy storage inverter 3 is zero, and the AC voltage on the high voltage side of the main transformer 11 is detected to be zero, whether the current battery SOC of the flow battery system 4 fed back by the battery management system meets a certain preset Conditions are judged, and according to the judgment result that the current battery SOC of the flow battery system 4 satisfies a certain preset condition, a control command for entering the black start mode is issued; %, because when the power generated by the wind turbine is greater than the rated power of the flow battery, the frequency and amplitude of the microgrid voltage fluctuate greatly, far exceeding the power quality requirements stipulated in the national power quality standard. Low-voltage ride-through protection exits; gradually the generated power of the wind turbine monitors the power quality of the microgrid voltage. When the generated power of the wind turbine is less than 80% of the rated power of the liquid flow battery, the amplitude and frequency of the microgrid voltage output Stable, meeting the power quality requirements stipulated in the national power quality standard.

The power-off sequence of the equipment in the wind field with the black start function of the present invention meets the requirements of the electric power specification, that is, the principle of first breaking the load and then the power supply; as shown in Figure 2, after the first bus 1 is powered off, firstly disconnect the lines of each fan The connection with the first bus 1, specifically, the wind field includes No. 1 fan line 8, No. 2 fan line 9 and No. 3 fan line 10. No. 1 fan line 8 is connected to the first bus 1 through switch S1, The No. fan line 9 is connected to the first bus 1 through the switch S2, and the No. 3 fan line 10 is connected to the first bus 1 through the switch S3, then the switch S1, the switch S2 and the switch S3 are turned off in turn, and each fan line is connected to the first bus. After the connection between 1 is disconnected, the connection between each load line and the first bus 1 is disconnected in turn. Specifically, the wind farm includes No. 1 load line 12 and No. 2 load line 13, and No. 1 load line 12 passes through The switch S4 is connected to the first bus 1, and the No. 2 load line 13 is connected to the first bus 1 through the switch S5, then the switches S4 and S5 are turned off in turn, and after the connection between each load line and the first bus 1 is disconnected , and then disconnect the connection between the aforementioned PT line 14, SVG line 15 and the first bus bar 1, specifically, the connection between the PT line 14 and the first bus bar 1 through switch S6, and the connection between the SVG line 15 and the first bus bar 1 If the connection is made through the switch S7, the switches S6 and S7 are turned off in turn, and finally the connection between the first bus 1 and the main transformer 11 is turned off, specifically, the switch S8 is turned off.

The invention provides a liquid flow battery energy storage system with a black start function of a wind farm and its working method, which can directly pass through the liquid flow battery under the condition that it cannot rely on other power grids to restore power after the entire wind farm loses power and shuts down. The flow battery system supplies power to the wind farm's non-startable units and partial loads, and then gradually expands the recovery range of the wind power system step by step, and finally realizes the restoration of the power supply of the entire wind farm system; since there is no need to configure additional diesel generators, gas turbines or UPS to start The power supply and corresponding auxiliary equipment do not need to improve the energy storage system and structure of the wind farm. Compared with the existing technology, this system has a series of advantages such as simple structure, greatly reduced cost, fast start-up speed, and high utilization rate of the energy storage system.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (7)

1. a kind of redox flow battery energy storage system with wind field black starting-up function, the wind field include the first bus, the second bus, Main transformer between first bus and the second bus and a plurality of blower route being connected with the first bus, feature exist Include in the redox flow battery energy storage system：

Flow battery system；The flow battery system includes pile, positive fluid reservoir, cathode fluid reservoir, circulating pump and electrolysis Liquid circulation line；

The first transformer being connected with first bus；

The energy storage inverter being connected with the flow battery system and first transformer；The energy storage inverter is by liquid stream The direct current of battery system output carries out after inversion through the boosting output of the first transformer to first bus, and by first Alternating current on bus carries out rectification output to the flow battery system by energy storage inverter after the first transformer pressure-reducing Charging；

The battery management system being connected with the flow battery system；The battery management system is for monitoring flow battery system The operating status of system simultaneously obtains operating parameter；The operating parameter includes at least battery SOC；

The Energy Management System being connected with the battery management system, energy storage inverter and the first bus；The energy management Whether system meets the flow battery system present battery SOC of battery management system feedback after knowing the power-off of the first bus Certain predetermined condition is judged, and meets the judging result of certain predetermined condition according to flow battery system present battery SOC It issues and enters black starting-up mode control instruction；It issues in Energy Management System into after black starting-up mode control instruction, it is described Energy storage inverter changes into V/F control model by PQ control model, and adjust output voltage make the first transformer boost after Obtained voltage meets the power quality requirement of power quality national standard defined；

The Energy Management System connects the energy storage inverter and flow battery system by monitoring system on the spot；The operation Parameter further includes cell voltage；It issues in the Energy Management System into after black starting-up mode control instruction, monitors on the spot System starts flow battery system, the energy management according to the black starting-up mode control instruction that enters that Energy Management System issues System judges whether the flow battery system current battery level that battery management system is fed back is more than or equal to predeterminated voltage, It is that energy storage inverter changes into V/F control model by PQ control model, and adjusts output voltage and make the first transformer liter The voltage obtained after pressure meets the power quality requirement of power quality national standard defined, and otherwise Energy Management System is to battery Whether the flow battery system current battery level of management system feedback, which is more than or equal to predeterminated voltage, continues to judge；

The redox flow battery energy storage system further includes UPS and the second transformer for being connected with the first bus；First bus does not break When electric, the second transformer exports electric energy to Energy Management System, flow battery system, storage after converting to the first busbar voltage Energy inverter, on the spot monitoring system and battery management system provide working power, when the first bus powers off, by the UPS to energy Management system, flow battery system, energy storage inverter, on the spot monitoring system and battery management system offer working power are provided.

2. a kind of redox flow battery energy storage system with wind field black starting-up function according to claim 1, it is characterised in that The voltage obtained after energy storage inverter adjustment output voltage makes the first transformer boost meets power quality country mark Any wind-driven generator starting after the power quality of quasi- defined requires, in the blower route；The wind-driven generator It is connected with control device；The control device detects current first busbar voltage, and whether just to judge current first busbar voltage It often, is to control the wind-driven generator to carry out limit Power operation, otherwise the control device continues above-mentioned judgement.

3. a kind of redox flow battery energy storage system with wind field black starting-up function according to claim 1, it is characterised in that The flow battery system at least 2, and be mutually backups；There are two primary coils for the first transformer tool；Each liquid stream Battery system is connected via an energy storage inverter with a primary coil of first transformer；When in any be currently running When flow battery system breaks down, another flow battery system as backup starts and runs.

4. a kind of redox flow battery energy storage system with wind field black starting-up function according to claim 2, the wind field is also Including a plurality of charge circuit being connected with the first bus, a plurality of charge circuit according to hierarchal order be divided into important load route and Insignificant charge circuit, it is characterised in that carry out limit Power operation and then the operation wind controlling the wind-driven generator The microgrid that power generator, flow battery system and energy storage inverter are constituted, and meet power quality country in microgrid voltage After the power quality of prescribed by standard requires, successively start each important load route according to hierarchal order.

5. a kind of redox flow battery energy storage system with wind field black starting-up function according to claim 2, it is characterised in that The generated output of the wind-driven generator is lower than the 80% of flow battery rated power.

6. a kind of a kind of work side of the redox flow battery energy storage system with wind field black starting-up function as described in claim 1 Method, it is characterised in that the working method includes the following steps：

1. the operating status of battery management system monitoring flow battery system simultaneously obtains operating parameter, the operating parameter is at least wrapped Battery SOC is included, is executed 2.；

2. Energy Management System judges whether the first bus powers off, it is, executes 3., otherwise returns 2.；

3. it is certain pre- that Energy Management System judges whether the flow battery system present battery SOC of battery management system feedback meets If condition is, execute 4., otherwise returns 2.；

4. Energy Management System is issued into black starting-up mode control instruction, execute 5.；

5. energy storage inverter changes into V/F control model by PQ control model, and adjusts output voltage and make the first transformer The voltage obtained after boosting meets the power quality requirement of power quality national standard defined；

Wherein, the operating parameter further includes cell voltage；The working method step 4. and step 5. between also have such as Lower step：Start flow battery system；The flow battery system present battery that Energy Management System feeds back battery management system Whether voltage, which is more than or equal to predeterminated voltage, is judged, is to execute 5., otherwise Energy Management System is anti-to battery management system Whether the flow battery system current battery level of feedback, which is more than or equal to predeterminated voltage, continues to judge；The flow battery energy storage System further includes UPS and the second transformer for being connected with the first bus；When first bus does not power off, the second transformer is to first Busbar voltage exports electric energy to Energy Management System, flow battery system, energy storage inverter, on the spot monitoring system after being converted Working power is provided with battery management system, when the first bus powers off, by the UPS to Energy Management System, flow battery system System, energy storage inverter, on the spot monitoring system and battery management system provide working power.

7. a kind of working method of redox flow battery energy storage system with wind field black starting-up function according to claim 6, It is characterized in that 5. the working method also has following steps in step later：

Start any wind-driven generator in the blower route；

Control device detects current first busbar voltage, and judges whether current first busbar voltage is normal, is described in then control Wind-driven generator carries out limit Power operation, otherwise continues whether to be normally carried out judgement to current first busbar voltage.