CN113126546A - Distributed energy storage system frequency support controller and control method - Google Patents
Distributed energy storage system frequency support controller and control method Download PDFInfo
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- G05B19/00—Programme-control systems
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Abstract
The invention discloses a distributed energy storage system frequency support controller and a control method, wherein the controller comprises: the data processing control unit is used for receiving the SOC of the energy storage system and the frequency information of the energy storage system and controlling the energy storage system to carry out primary frequency modulation; the data acquisition unit is used for acquiring the SOC (system on chip) and frequency information of the energy storage system and transmitting the information to the data processing control unit; the data transmission unit uses Ethernet as a data transmission interface to transmit data comprising the information of the energy storage system SOC and the energy storage system frequency to a centralized frequency modulation control center, and returns the scheduling of the centralized frequency modulation control center to the data processing control unit; the data storage unit is used for storing data including the information of the SOC and the frequency of the energy storage system periodically; and the human-computer interaction unit is used for displaying the running state of the energy storage system. According to the invention, the response output of the energy storage system is carried out according to the SOC and the frequency information of the energy storage system, the frequency fluctuation of the system is improved, and the operation of the system is supported.
Description
Technical Field
The invention relates to the technical field of power system micro-grids, in particular to a distributed energy storage system frequency support controller and a control method.
Background
The distributed power generation can fully utilize clean and renewable energy sources, is an important measure for realizing the aims of energy conservation and emission reduction, and is also an effective supplement for centralized power generation. When a large number of distributed power sources are connected to a medium-low voltage distribution network, the voltage and frequency fluctuation in the distribution network is aggravated by the intermittency and randomness of the renewable distributed power sources such as wind power and photovoltaic, and the power balance and safe operation of the distribution network, the power supply reliability of users and the power quality are greatly influenced. In addition, with the economic development and industrial upgrading of China, the capacity of the existing distribution and transformation equipment in the power grid may not meet the increasing peak load requirements, and more high-tech and digital enterprises also put higher requirements on power supply reliability and power quality. The distributed electric energy storage technology is accessed into the power grid, so that the accepting capacity of the power grid to distributed energy can be improved, the power supply reliability and the electric energy quality of the system can be improved, the resource allocation of the power grid can be optimized, and the utilization rate of power grid assets can be improved. The electric energy storage system has the characteristics of high response speed, high output power control precision and the like, and meets the requirement of power grid frequency modulation. When the micro-grid is in an island operation mode, the distributed electric energy storage system can be used as a main power supply of the micro-grid to provide voltage and frequency support, the technical characteristics of quick response of the energy storage system are fully exerted, the power fluctuation of the micro-grid is balanced in real time, and the voltage and the frequency are ensured to be within an allowable operation range. The problem to be solved is to design a distributed energy storage system frequency support controller and a control method by combining the dispersibility of the energy storage system.
Disclosure of Invention
The invention provides a distributed energy storage system frequency support controller and a control method aiming at the dispersion requirement of an energy storage system.
In a first aspect of the present invention, a distributed energy storage system frequency support controller is provided, where the distributed energy storage system frequency support controller is respectively connected to a centralized frequency modulation control center and an energy storage system, and the controller includes:
a data processing control unit configured to:
receiving the information of the SOC and the frequency of the energy storage system, and connecting the energy storage system to control the energy storage system to carry out primary frequency modulation according to the information of the SOC and the frequency of the energy storage system;
a data acquisition unit configured to:
the system comprises a data processing control unit, an energy storage system and a data processing control unit, wherein the data processing control unit is used for acquiring the frequency information of the energy storage system and transmitting the frequency information of the energy storage system to the data processing control unit;
a data transmission unit configured to:
the Ethernet is used as a data transmission interface and is respectively connected with the data processing control unit and the centralized regulation and control center, the data comprising the information of the SOC and the frequency of the energy storage system is transmitted to the centralized frequency modulation control center, and the dispatching of the centralized regulation and control center is returned to the data processing control unit;
a data storage unit configured to:
the data processing control unit is connected with the data processing control unit and is used for periodically storing data comprising the SOC and the frequency information of the energy storage system;
a human-computer interaction unit configured to:
and the data processing control unit is connected with the energy storage system and is used for displaying the running state of the energy storage system.
Further, the data processing control unit is further configured to:
and making a second frequency modulation response to the returned scheduling of the centralized regulation and control center.
Further, the data processing control unit controls the energy storage system to perform first frequency modulation according to the energy storage system SOC and the energy storage system frequency information, specifically:
when the frequency fluctuation is larger than the dead zone, the data processing control unit determines an energy storage frequency modulation coefficient and controls the energy storage system to perform frequency modulation; and when the frequency fluctuation is in a dead zone, determining whether the SOC of the energy storage system is in a threshold range, and if not, determining the recovery coefficient of the energy storage system and controlling the energy storage system to recover by the data processing control unit.
Furthermore, the data processing control unit comprises an FPGA chip, a gigabit Ethernet interface chip, a data storage driving chip, an LCD driving module and a key driving module.
Furthermore, the man-machine interaction unit comprises an LCD display screen and a key.
Further, the data storage unit is further configured to:
when the storage space overflows, the initial storage data is rolled over in a time sequence.
In a second aspect of the present invention, a distributed energy storage system frequency support control method is provided, the method includes: receiving the information of the SOC and the frequency of the energy storage system by using a data processing control unit, and controlling the energy storage system to carry out primary frequency modulation according to the information of the SOC and the frequency of the energy storage system; acquiring the information of an energy storage system SOC and the frequency information of the energy storage system by using a data acquisition unit, and transmitting the information of the energy storage system SOC and the frequency information of the energy storage system to a data processing control unit; the method comprises the steps that a data transmission unit is used for transmitting data comprising energy storage system SOC and energy storage system frequency information to a centralized frequency modulation control center by taking an Ethernet as a data transmission interface, and the dispatching of the centralized frequency modulation control center is returned to a data processing control unit; the data storage unit is used for storing data including the information of the SOC and the frequency of the energy storage system periodically; and displaying the running state of the energy storage system by using the human-computer interaction unit.
Further, the method also comprises the step of utilizing the data processing control unit to make a second frequency modulation response to the returned scheduling of the centralized regulation and control center.
Further, the controlling the energy storage system to perform the first frequency modulation according to the energy storage system SOC and the energy storage system frequency information specifically includes: when the frequency fluctuation is larger than the dead zone, the data processing control unit determines an energy storage frequency modulation coefficient and controls the energy storage system to perform frequency modulation; and when the frequency fluctuation is in a dead zone, determining whether the SOC of the energy storage system is in a threshold range, and if not, determining the recovery coefficient of the energy storage system and controlling the energy storage system to recover by the data processing control unit.
Further, the method comprises the step of rolling and covering the initial stored data in a time sequence by using the data storage unit when the storage space overflows.
The invention provides a distributed energy storage system frequency support controller and a control method, which participate in primary frequency modulation by utilizing the quick response of the energy storage system response according to the SOC of the energy storage system and the frequency of the energy storage system, realize quick primary frequency modulation and realize energy storage system recovery when frequency modulation is not needed, and simultaneously, participate in secondary frequency modulation of the energy storage system by responding to the distributed output of a centralized regulation and control center in combination with the dispersibility of the energy storage system, realize the cooperative control of each distributed energy storage system and achieve the purpose of eliminating frequency deviation.
Drawings
Fig. 1 is a schematic structural diagram of a distributed energy storage system frequency support controller according to an embodiment of the present invention;
FIG. 2 is a flow chart of a first frequency tuning method in an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the frequency change of the load increase of the energy storage system according to an embodiment of the present invention;
FIG. 4 shows an embodiment of the invention in which the energy storage system KE0The relation change schematic diagram with the energy storage system SOC;
FIG. 5 shows the recovery requirement coefficient K of the energy storage system in the embodiment of the inventionE1A schematic diagram of variations;
FIG. 6 shows the charge-discharge constraint coefficient K of the energy storage system in the embodiment of the present inventionE2A schematic diagram of variations;
fig. 7 is a schematic diagram of a frequency supporting control method of a distributed energy storage system according to an embodiment of the invention.
Detailed Description
In order to further describe the technical scheme of the present invention in detail, the present embodiment is implemented on the premise of the technical scheme of the present invention, and detailed implementation modes and specific steps are given.
The embodiment of the invention aims at a distributed energy storage system frequency support controller and a control method. As shown in fig. 1, which is a schematic structural diagram of a distributed energy storage system frequency support controller 100 according to an embodiment of the present invention, the distributed energy storage system frequency support controller 100 is respectively connected to a centralized frequency modulation control center 301 and an energy storage system 201, and the controller 100 includes: a data processing control unit 101 configured to: receiving the information of the SOC and the frequency of the energy storage system, and connecting the energy storage system 201 to control the energy storage system 201 to perform first frequency modulation according to the information of the SOC and the frequency of the energy storage system; a data acquisition unit 102 configured to: the system is respectively connected with the data processing control unit 101 and the energy storage system 201, and is used for acquiring the information of the SOC and the frequency of the energy storage system and transmitting the information of the SOC and the frequency of the energy storage system to the data processing control unit 101; a data transmission unit 103 configured to: the ethernet is used as a data transmission interface to be respectively connected with the data processing control unit 101 and the centralized regulation and control center 301, and transmits data including the information of the SOC and the frequency of the energy storage system to the centralized frequency modulation control center 301, and returns the scheduling of the centralized regulation and control center 301 to the data processing control unit 101; a data storage unit 104 configured to: the data processing control unit 101 is connected to the storage unit and is used for periodically storing data including the SOC and frequency information of the energy storage system; a human-machine interaction unit 105 configured to: and the data processing control unit 101 is connected to display the operating state of the energy storage system.
In a specific embodiment, the energy storage system 201 is a battery energy storage system, the data processing control unit 101 is a core component of the controller 100 and mainly completes primary frequency modulation, energy storage recovery and secondary frequency modulation tasks, the data processing control unit 101 is composed of an FPGA module, a gigabit ethernet interface chip, a data storage driving chip, an LCD driving module and a key driving module, and the data processing control unit 101 is simultaneously connected with the human-computer interaction unit 105 and the data storage unit 104.
In a specific embodiment, the acquisition accuracy of the data acquisition unit 102 directly affects the system performance, so the accuracy of the acquisition system is guaranteed. The acquisition unit is mainly used for acquiring the SOC of the energy storage system and the frequency information of the energy storage system. The acquisition of the frequency information of the energy storage system firstly needs to carry out voltage reduction treatment, 220V alternating current is changed into 5V alternating current through a transformer, a plurality of voltage zero crossing points are measured, an average value is calculated, the frequency is obtained, and the frequency is updated according to a certain period. The embodiment adopts a model-based method, firstly utilizes an established accurate model to carry out prior estimation of the SOC and prediction of the terminal voltage, then carries out gain correction according to the comparison condition of an actual measured value and a predicted value of the terminal voltage, and continuously carries out iterative optimization to realize the optimal estimation of the SOC. The method can realize high-precision estimation of the SOC on the basis of an accurate model, and the estimation value of the SOC can be converged quickly even if the initial SOC error is large, so that the robustness is good.
In a specific embodiment, the data storage unit 104 is an SD card, periodically stores data such as frequency information of the energy storage system, SOC of the energy storage system, and operating power at a given time interval, and covers early storage data when the SD card is full, and at the same time, the database can be used to optimize a system algorithm and upgrade the energy storage system.
In a specific embodiment, the data acquisition unit 102 is composed of a data preprocessing unit and an a/D converter unit, and acquires the SOC and frequency information of the energy storage system.
In one embodiment, the data transmission unit 103 is used to communicate the distributed energy storage systems with the centralized fm control center 301 to transmit SOC and scheduling information. The data transmission unit 103 adopts ethernet as a data transmission interface, has the capability of transmitting the running state data of the energy storage system in real time, and can transmit the data including the SOC and the frequency information of the energy storage system to the centralized frequency modulation control center 301; and returns the scheduled output of the centralized fm control center 301 to the data processing control unit 101.
In an embodiment, the human-computer interaction unit 105 includes an LCD display screen and a key, the LCD display screen displays the operation state of the energy storage system, and an operator can clearly know the operation state of the energy storage system 201.
In a specific embodiment, the data processing control unit 101 controls the energy storage system 201 to perform a first frequency modulation according to the energy storage system SOC and the energy storage system frequency information, specifically: the energy storage system 201 is controlled to charge or discharge according to a given frequency-coefficient curve and the energy storage system SOC, so that the purpose of quickly suppressing the frequency fluctuation of the system is achieved, and the method is quick differential adjustment. And then, the local SOC is sent to the centralized frequency control center 301 through the data transmission unit 103, and second frequency modulation is performed in response to the scheduling of the centralized frequency control center 301, so that frequency adjustment without difference is realized. The first-time frequency modulation specific implementation flow is shown in fig. 2:
when the frequency fluctuation is larger than the dead zone, the data processing control unit 101 determines an energy storage frequency modulation coefficient and controls the energy storage system 201 to perform frequency modulation; when the frequency fluctuation is in the dead zone, determining whether the SOC of the energy storage system is in a threshold range, and if not, determining the recovery coefficient of the energy storage system and controlling the energy storage system 201 to recover by the data processing control unit 101.
In one embodiment with a sudden increase in the load on the energy storage system 201, shown in FIG. 3, Δ fdIs that the set frequency modulation threshold is set to 0.02Hz, Δ fmIs the maximum value of frequency variation, Δ fsFor the steady-state frequency after the primary frequency modulation, it can be seen that when the load suddenly increases, the frequency decreases and then increases, the frequency change rate gradually increases and then decreases to zero, and finally the steady-state frequency and the initial frequency have a difference. The primary frequency modulation output of the energy storage system is delta P ═ KE0Δ f, a positive power indicates charging, and a negative power indicates discharging. Wherein KE0In relation to SOC, the SOC is set as shown in FIG. 4minAnd SOCmaxIn order to control the charging and discharging depth, the service life of the battery is respectively set to 10 percent and 90 percent; at S1、Slow、Shigh、S2Are turning points of the charge and discharge rate of the battery, and are respectively 30%, 45%, 55% and 70%. Wherein SlowAnd ShighIs the ideal SOC of the energy storage system 201, i.e. the threshold range of the energy storage system SOC, K in the embodimentE0max＝1MW/Hz。
The control target of the energy storage system SOC is to keep the SOC at or close to an ideal state, namely within a threshold range, and solve the problem of insufficient frequency modulation capability caused by overhigh or overlow energy storage SOC. As shown in fig. 2, when the grid frequency meets the requirement and the SOC is not in an ideal state, the recovery demand coefficient is calculated according to the SOC, the recovery demand coefficient is constrained by the grid bearing capacity, and the two coefficients are taken as the recovery coefficients, specifically: when the SOC is larger than the SOChigh, the energy storage system is required to be discharged and recovered, and when the SOC is smaller than the SOClow, the energy storage system is required to be charged and recovered. Combining with charge-discharge constraint, and comparing the two as a coefficient, wherein P issTo set the power, PrFor charging and discharging power, 1KW and K are taken in the examplesE1For restoring the demand coefficient, K, of the energy storage systemE2For the charge-discharge constraint coefficient of the energy storage system, in the embodiment, the recovery demand curve and the constraint curve of the energy storage system 201 are respectively shown in fig. 5 and fig. 6, and the specific expression is as follows:
|Kr|＝min{|KE1|，KE2}
sign(Kr)＝sign(KE1)
Pr＝KrPS
further, the data processing control unit 101 is further configured to: and making a second frequency modulation response to the returned scheduling of the centralized regulation and control center 301, wherein the second frequency modulation is that when the frequency fluctuation of the energy storage system is greater than the dead zone, the frequency of the energy storage system is not recovered by only relying on the first frequency modulation, the centralized regulation and control center 301 collects all the SOC of the energy storage system, then reasonably distributes the frequency modulation output according to the system frequency deviation to realize the second frequency modulation, the second frequency modulation output is calculated and distributed by the centralized regulation and control center 301, and is sent to the data processing control unit 101 through the data transmission unit 103, and then the data processing control unit 101 controls the frequency modulation of the energy storage system 201.
Five examples in specific embodiments are given below:
example 1
The data acquisition unit 102 acquires the system frequency and the energy storage system SOC, and sends the data to the data processing control unit 101, the measured system frequency is 49.985Hz, the system SOC is 20%, Δ f is-0.015, and is smaller than the primary frequency modulation threshold, the data processing control unit 101 controls the energy storage system 201 to perform energy storage recovery, and K is obtained through calculationE1＝3/4，KE2＝1/2，
|Kr|＝min{|KE1|，KE2}＝1/2
sign(Kr)＝sign(KE1)
The energy storage system 201 is charged with 500W of power, and as the charging progresses, the charging power is also attenuated continuously.
Example 2
The data acquisition unit 102 acquires that the SOC of the energy storage system is 80%, the system frequency is 49.99Hz, and Δ f is 0.01Hz, and the energy storage system performs discharge recovery within the frequency modulation threshold. Combining the energy storage recovery demand curve with the constraint curve, KE 1-3/4, KE 2-3/4,
the energy storage system discharges at 750W and as the discharge progresses, the discharge power decays.
Example 3
When the energy storage system 201 suddenly has a large load, the data acquisition unit 102 detects that the system voltage drops to 49.9HZ, and the SOC of the pure system is 9%. At this time, since the frequency drops to exceed the threshold, the energy storage system 201 needs to discharge, but the energy storage system does not exert any force in combination with the discharge curve of the energy storage system 201. Because more than one energy storage system 20l participating in frequency modulation can participate in system frequency modulation, the energy storage systems meeting the SOC condition can participate in system frequency modulation, the dispersity of the energy storage system 201 can be fully utilized, and the fault tolerance rate of the system is improved.
Example 4
The energy storage system 201 is subjected to load shedding, the frequency of the energy storage system is increased to 50.1Hz, and the SOC of the energy storage system is 50% as measured by the data acquisition unit 102. The SOC of the energy storage system is in an ideal interval, KE0＝KE0max＝1MW/Hz，Δf＝0.1Hz。
ΔP＝KE0Δf＝1KW
The energy storage system 201 is charged with 1KW of power, and as the charging progresses, the SOC and the frequency deviation change, and the charging power also changes. Primary frequency modulation does not completely eliminate frequency deviation, and secondary frequency modulation is also needed. After the data transmission unit 103 transmits the energy storage system SOC to the centralized frequency modulation control center 301, the scheduling information is returned, and the local energy storage system outputs the scheduling information to participate in secondary frequency modulation.
Example 5
When the energy storage system 201 is connected with a large load, the data acquisition unit 102 monitors that the frequency suddenly drops to 49.7Hz and the system SOC is 27%. Participating in primary frequency modulation, discharging the energy storage system, and recovering a demand curve and a constraint curve, K, by combining the energy storage system 201E0＝17/40*KEmax＝425KW/Hz，Δf＝-0.3Hz
ΔP＝KE0Δf＝-127.5KW
The energy storage system 201 discharges with 127.5KW power and participates in the second frequency modulation process as in embodiment 4, i.e. receives the scheduling command via the data transmission unit.
A control method corresponding to a distributed energy storage system frequency support controller shown in fig. 1 according to an embodiment of the present disclosure is described below with reference to fig. 1, including: a01: receiving the information of the SOC and the frequency of the energy storage system by using a data processing control unit, and controlling the energy storage system to carry out primary frequency modulation according to the information of the SOC and the frequency of the energy storage system; a02: acquiring the information of an energy storage system SOC and the frequency information of the energy storage system by using a data acquisition unit, and transmitting the information of the energy storage system SOC and the frequency information of the energy storage system to a data processing control unit; a03: the method comprises the steps that a data transmission unit is used for transmitting data comprising energy storage system SOC and energy storage system frequency information to a centralized frequency modulation control center by taking an Ethernet as a data transmission interface, and the dispatching of the centralized frequency modulation control center is returned to a data processing control unit; a04: the data storage unit is used for storing data including the information of the SOC and the frequency of the energy storage system periodically; a05: and displaying the running state of the energy storage system by using the human-computer interaction unit. Fig. 7 is a schematic diagram of a corresponding control method of a distributed energy storage system frequency support controller according to an embodiment of the present invention. Since the control method is the same as the details of the controller implementation method described above with reference to fig. 1, a detailed description of the same is omitted here for the sake of simplicity.
Further, the method also comprises the step of utilizing the data processing control unit to make a second frequency modulation response to the returned scheduling of the centralized regulation and control center.
Further, the controlling the energy storage system to perform the first frequency modulation according to the energy storage system SOC and the energy storage system frequency information specifically includes: when the frequency fluctuation is larger than the dead zone, the data processing control unit determines an energy storage frequency modulation coefficient and controls the energy storage system to perform frequency modulation; and when the frequency fluctuation is in a dead zone, determining whether the SOC of the energy storage system is in a threshold range, and if not, determining the recovery coefficient of the energy storage system and controlling the energy storage system to recover by the data processing control unit.
Further, the method comprises the step of rolling and covering the initial stored data in a time sequence by using the data storage unit when the storage space overflows.
The specific working process of the distributed energy storage system frequency support control method refers to the description of the above distributed energy storage system frequency support controller implementation mode, and is not repeated.
By integrating the distributed energy storage system frequency support controller and the control method provided by the above embodiments, the rapidity of response of the energy storage system 201 is utilized, the output can be responded according to the SOC and the frequency information of the energy storage system, the output participates in the primary frequency modulation, the distribution of the output by the centralized regulation and control center 301 can also be completed, the secondary frequency modulation of the energy storage system is participated, the system frequency fluctuation is improved, and the operation of the system is supported.
In this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process or method.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A distributed energy storage system frequency support controller, the distributed energy storage system frequency support controller is connected with centralized frequency modulation control center, energy storage system respectively, its characterized in that, the controller includes:
a data processing control unit configured to:
receiving the information of the SOC and the frequency of the energy storage system, and connecting the energy storage system to control the energy storage system to carry out primary frequency modulation according to the information of the SOC and the frequency of the energy storage system;
a data acquisition unit configured to:
the system comprises a data processing control unit, an energy storage system and a data processing control unit, wherein the data processing control unit is used for acquiring the frequency information of the energy storage system and transmitting the frequency information of the energy storage system to the data processing control unit;
a data transmission unit configured to:
the Ethernet is used as a data transmission interface and is respectively connected with the data processing control unit and the centralized regulation and control center, the data comprising the information of the SOC and the frequency of the energy storage system is transmitted to the centralized frequency modulation control center, and the dispatching of the centralized regulation and control center is returned to the data processing control unit;
a data storage unit configured to:
the data processing control unit is connected with the data processing control unit and is used for periodically storing data comprising the SOC and the frequency information of the energy storage system;
a human-computer interaction unit configured to:
and the data processing control unit is connected with the energy storage system and is used for displaying the running state of the energy storage system.
2. The distributed energy storage system frequency support controller of claim 1, wherein the data processing control unit is further configured to:
and making a second frequency modulation response to the returned scheduling of the centralized regulation and control center.
3. The distributed energy storage system frequency support controller according to claim 1, wherein the data processing control unit controls the energy storage system to perform a first frequency modulation according to the energy storage system SOC and the energy storage system frequency information, specifically:
when the frequency fluctuation is larger than the dead zone, the data processing control unit determines an energy storage frequency modulation coefficient and controls the energy storage system to perform frequency modulation; and when the frequency fluctuation is in a dead zone, determining whether the SOC of the energy storage system is in a threshold range, and if not, determining the recovery coefficient of the energy storage system and controlling the energy storage system to recover by the data processing control unit.
4. The distributed energy storage system frequency support controller of claim 1, wherein the data processing control unit comprises an FPGA chip, a gigabit ethernet interface chip, a data storage driver chip, an LCD driver module, and a key driver module.
5. The distributed energy storage system frequency support controller of claim 1, wherein said human-machine interaction unit comprises an LCD display and keys.
6. The distributed energy storage system frequency support controller of claim 1, wherein the data storage unit is further configured to:
when the storage space overflows, the initial storage data is rolled over in a time sequence.
7. A distributed energy storage system frequency support control method, the method comprising:
receiving the information of the SOC and the frequency of the energy storage system by using a data processing control unit, and controlling the energy storage system to carry out primary frequency modulation according to the information of the SOC and the frequency of the energy storage system;
acquiring the information of an energy storage system SOC and the frequency information of the energy storage system by using a data acquisition unit, and transmitting the information of the energy storage system SOC and the frequency information of the energy storage system to a data processing control unit;
the method comprises the steps that a data transmission unit is used for transmitting data comprising energy storage system SOC and energy storage system frequency information to a centralized frequency modulation control center by taking an Ethernet as a data transmission interface, and the dispatching of the centralized frequency modulation control center is returned to a data processing control unit;
the data storage unit is used for storing data including the information of the SOC and the frequency of the energy storage system periodically;
and displaying the running state of the energy storage system by using the human-computer interaction unit.
8. The distributed energy storage system frequency support control method of claim 7, further comprising responding with the data processing control unit to a second frequency modulation of the returned schedule of the centralized regulatory control center.
9. The distributed energy storage system frequency support control method according to claim 7, wherein the controlling the energy storage system to perform the first frequency modulation according to the energy storage system SOC and the energy storage system frequency information specifically comprises:
when the frequency fluctuation is larger than the dead zone, the data processing control unit determines an energy storage frequency modulation coefficient and controls the energy storage system to perform frequency modulation; and when the frequency fluctuation is in a dead zone, determining whether the SOC of the energy storage system is in a threshold range, and if not, determining the recovery coefficient of the energy storage system and controlling the energy storage system to recover by the data processing control unit.
10. The distributed energy storage system frequency support control method of claim 7, further comprising using the data storage unit to scroll over the first stored data in a chronological order when an overflow of storage space occurs.
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