Intelligent energy storage power station system

Abstract

The utility model relates to the technical field of electric energy storage, in particular to an intelligent energy storage power station system, which comprises an energy storage battery module, an energy storage inversion module and an industrial control module, the energy storage battery module is electrically connected with the energy storage inversion module and is used as an energy storage unit for charging and discharging; the energy storage inversion module is electrically connected with a load and a power grid and is used for adjusting voltage, frequency and power and realizing constant-power constant-current charging and discharging and smooth fluctuation power supply output; and the industrial control module is electrically connected with the energy storage battery module and the energy storage inversion module and is used for controlling the energy storage battery module and the energy storage inversion module. The utility model aims to provide an intelligent energy storage power station system, which can accurately and quickly adjust voltage, frequency and power between a power grid and an energy storage system, realizes constant-power constant-current charging and discharging and smooth fluctuating power supply transmission, has various energy storage application functions such as peak load shifting, backup power supply and frequency adjustment, and is good in compatibility and high in reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric energy storage, especially to an intelligent energy storage power station system. BACKGROUND

[0002] As an important means of realizing carbon neutrality, future new energy power generation will usher in unprecedented development, traditional energy power generation (such as coal power) will gradually withdraw, and it is estimated that the total installed capacity of wind power and solar power will reach more than 1.2 billion kilowatts by 2030. The instability and intermittency of photovoltaic and wind power make it difficult for the current power grid to accommodate, and energy storage systems will become an important technical means for new energy stable grid connection, frequency regulation for new energy, and thus effective utilization of new energy power generation.

[0003] Due to voltage fluctuation, the frequency converter trips, causing loss of production and quality to the enterprise. According to past experience data of production loss, material waste and human resource waste caused by equipment downtime due to voltage problems, each downtime causes great economic loss and safety production pressure. UTILITY MODEL CONTENT

[0004] The utility model aims at providing an intelligent energy storage power station system that accurately and quickly adjusts voltage, frequency and power between the power grid and the energy storage system, realizes constant power and constant current charging and discharging, and smooths fluctuating power supply, has peak clipping, backup power supply, frequency regulation and other energy storage application functions, has good compatibility and high reliability.

[0005] To achieve this purpose, the utility model adopts the following technical scheme: an intelligent energy storage power station system comprising an energy storage battery module, an energy storage inverter module and an industrial control module.

[0006] The energy storage battery module is electrically connected with the energy storage inverter module and is used as an energy storage unit for charging and discharging.

[0007] The energy storage inverter module is electrically connected with the load and the power grid and is used for adjusting voltage, frequency and power, realizing constant power and constant current charging and discharging, and smoothing fluctuating power output.

[0008] The industrial control module is electrically connected with the energy storage battery module and the energy storage inverter module and is used for controlling the energy storage battery module and the energy storage inverter module.

[0009] Preferably, the energy storage battery module comprises a battery module and a battery management module, the battery module comprises a plurality of batteries, the battery management module is electrically connected with the battery module, and the battery management module is used for voltage acquisition, current acquisition, temperature acquisition, capacity diagnosis SOC, battery health estimation SOH and battery cell balancing maintenance of the battery module, and sends information of the battery module to the industrial control module; the industrial control module receives the information uploaded by the battery management module, and controls the energy storage inverter module to charge and discharge the battery module.

[0010] Preferably, the battery management module comprises a master control unit, a main control unit and a slave control unit, the main control unit is used for overall control management of the battery management module, the main control unit is used for slave control management of the battery management module, and the slave control unit is used for information acquisition management of the battery module.

[0011] Preferably, the energy storage inverter module comprises a direct-current switch, a fuse, a contactor, an inverter bridge, a transformer and a contactor; the direct-current switch, the fuse, the contactor, the inverter bridge, the transformer and the contactor are connected in series, one end of the direct-current switch is electrically connected with the energy storage battery module, and one end of the contactor is electrically connected with a load and a power grid.

[0012] Preferably, the voltage management module is further comprised, which is used for controlling the energy storage inverter module to output a compensation voltage with variable amplitude and phase angle in series between the intelligent energy storage power station system and the load when a voltage sag fault occurs, so as to perform overall management on voltage sag, voltage swell and short-time interruption of the power grid.

[0013] Preferably, the voltage management module comprises an input switch, an output switch, a maintenance bypass switch, a thyristor, an inverter and a super capacitor; the input switch, the thyristor and the output switch are connected in series, one end of the input switch is electrically connected with the power grid, one end of the output switch is electrically connected with the load, the maintenance bypass switch is connected in parallel between one end of the input switch and one end of the output switch, one end of the inverter is connected between the thyristor and the output switch, and the other end of the inverter is electrically connected with the super capacitor.

[0014] Preferably, the industrial control module further comprises a fire detection and control module, the fire detection and control module comprises a plurality of fire environment sensors, and the plurality of fire environment sensors are arranged in the plurality of batteries of the battery module and are used for monitoring environmental temperature, gas composition, VOC and smoke concentration.

[0015] Preferably, the industrial control module further comprises a grid-connected line relay protection module, which is used for providing time-limited current quick breaking, overcurrent, zero sequence protection, high-frequency trip-out, low-frequency trip-out, overvoltage and low-voltage protection functions.

[0016] Preferably, the industrial control module further comprises an electric energy quality monitoring module for monitoring voltage and current signals of a grid-connected point between the energy storage inverter module and the load, and sending the voltage and current signals of the grid-connected point to the industrial control module.

[0017] Preferably, the industrial control module further comprises an automation monitoring module for monitoring each device unit of the intelligent energy storage power station system.

[0018] The technical scheme provided by the utility model can have the following beneficial effects:

[0019] The utility model discloses a high -performance energy storage inverter module can be accurately and quickly regulated voltage, frequency, power between the power grid and energy storage system, realizes constant -power constant -current charging and discharging and smooth fluctuation power output, and its output electric energy quality is even better than power grid electric energy quality. Can support load side energy storage, carry out centralized new energy power generation and energy storage, can reduce the random nature of new energy power generation output, realize new energy power generation coordinated energy storage technology. Can realize the value of high income including voltage management guarantee safety in production, distributed energy storage peak valley arbitrage, preferential electricity cooperation, distributed energy storage demand side response operation, new energy frequency modulation service operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the connection schematic drawing of an embodiment of the utility model;

[0021] Figure 2 It is the connection schematic drawing of energy storage battery module, energy storage inverter module and industrial control module of an embodiment of the utility model;

[0022] Figure 3 It is the schematic drawing of three -level architecture of battery management module of an embodiment of the utility model;

[0023] Figure 4 It is the connection schematic drawing of energy storage inverter module of an embodiment of the utility model;

[0024] Figure 5 It is the connection schematic drawing of voltage management module of an embodiment of the utility model.

[0025] Among them, energy storage battery module 1, energy storage inverter module 2, industrial control module 3, voltage management module 4. DETAILED DESCRIPTION

[0026] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0027] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two.

[0028] In the description of the utility model, it is to be explained that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be fixed connection, can be detachable connection, or integrally connected, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0029] The utility model discloses an intelligent energy storage power station system. Figures 1 to 5 , describes an intelligent energy storage power station system of the utility model embodiment.

[0030] An intelligent energy storage power station system, comprising energy storage battery module 1, energy storage inverter module 2 and industrial control module 3;

[0031] Energy storage battery module 1, with energy storage inverter module 2 electric connection, for charging and discharging as energy storage unit;

[0032] Energy storage inverter module 2, with load and power grid electric connection, for accurately and quickly adjusting voltage, frequency, power, realizing constant power constant current charging and discharging and smooth fluctuation power output;

[0033] Industrial control module 3, with energy storage battery module 1 and energy storage inverter module 2 electric connection, for controlling energy storage battery module 1 and energy storage inverter module 2, has multiple energy storage application functions such as peak clipping, backup power supply, frequency regulation, selects mature industrial-grade PLC control platform, good compatibility, high reliability, can be hung with various equipment on site.

[0034] The utility model adopts high-performance energy storage inverter module 2, can accurately and quickly adjust voltage, frequency, power between power grid and energy storage system, realizes constant power constant current charging and discharging and smooth fluctuation power output, and its output power quality is even better than power grid power quality. Can support load side energy storage, carry out centralized new energy generation and energy storage, can reduce the randomness of new energy generation output, realize new energy generation coordinated energy storage technology. Can realize the value of high yield including voltage management guarantee safety in production, distributed energy storage peak valley arbitrage income, preferential electricity cooperation income, distributed energy storage demand side response operation, new energy frequency modulation service operation.

[0035] The energy storage battery module 1 comprises a battery module comprising a plurality of batteries and a battery management module electrically connected with the battery module, for voltage collection, current collection, temperature collection, capacity diagnosis SOC, battery health estimation SOH and battery pack cell equalization maintenance of the battery module, sending information of the battery module to the industrial control module 3, and the industrial control module 3 receives the information uploaded by the battery management module and controls the energy storage inverter module 2 to charge and discharge the battery module, so as to achieve the effects of peak regulation, valley filling, power output and the like.

[0036] The battery management module (Battery Management System, BMS for short) as the core component of the energy storage battery module 1 is the bridge between the battery module and the external device, determines the utilization rate of the battery, and its performance is crucial to the use cost and safety performance of the energy storage system. The battery management module collects, processes and stores important information in the running process of the battery pack in real time, exchanges information with external devices, and alarms and protects in real time during the running process of the battery module. The battery management module generally adopts a multi-level distributed architecture design, and according to different energy storage systems, two-level or three-level architecture schemes are adopted.

[0037] The battery management module comprises a total control unit, a master control unit and a slave control unit, the master control unit is used for total control management of the battery management module, the master control unit is used for slave control management of the battery management module, and the slave control unit is used for information collection management of the battery module.

[0038] The functions of the battery management module include:

[0039] 1. The working voltage is 24V, the voltage range is 7.5V to 32V, which meets the needs of various energy storage occasions, the rated total power consumption of a single component is less than 8W, and the anti-reverse connection function is provided;

[0040] 2. The battery cell voltage and the battery module group terminal voltage collection function are provided, the collection precision is high and the speed is fast, and the reliability of the collection can be ensured through comparison of the single cell accumulation and the group terminal collection;

[0041] 3. The temperature collection and current collection functions are provided, and the number of temperature collection and the current collection mode can be flexibly configured, and the collection has the characteristics of high precision and high reliability;

[0042] 4. The precise insulation detection function is provided to ensure the safety and reliability of the battery module;

[0043] 5. According to the collected information of the battery, a self-contained comprehensive algorithm is adopted to calculate the SOC and SOH of the battery in real time, and excellent precision can be obtained under dynamic and static conditions of the battery module;

[0044] 6. Collecting and calculating information according to the battery module, judging the working state and fault level of the battery module in real time, realizing the alarm and protection functions of the battery module;

[0045] 7. Having rich interface functions, which can meet the application of various occasions, and facilitate the realization of the charge and discharge control of the battery module, the temperature control of the battery module and other functions;

[0046] 8. Having multiple CAN and RS485 communication interfaces, which can realize the information exchange and control with the energy storage inverter module 2 and the industrial control module 3, and the information transmission with the display module, the module can be extended with GPRS function, which can realize remote information monitoring, control and module upgrading functions;

[0047] 9. Selecting high-reliability devices, adopting multiple redundant protection measures, fully considering the possible harsh electromagnetic environment, high temperature, vibration and other environments in the energy storage module, and having high reliability, high stability and high anti-interference performance;

[0048] 10. It can be applied to various energy storage application scenarios including power station type energy storage, household energy storage, cascade utilization, etc., and has good expansibility and adaptability.

[0049] The energy storage inverter module 2 includes a direct current switch, a fuse, a contactor, an inverter bridge, a transformer and a contactor; the direct current switch, the fuse, the contactor, the inverter bridge, the transformer and the contactor are connected in series, one end of the direct current switch is electrically connected with the energy storage battery module 1, and one end of the contactor is electrically connected with a load and a power grid.

[0050] The advantages of the energy storage inverter module 2 include: widening the battery voltage range, supporting multiple battery access; realizing reactive power and active power adjustment functions; realizing off-grid cold start function, supporting multi-machine parallel connection function; having built-in isolation transformer with strong load adaptability; having perfect protection function to protect the inverter and the battery; having important function redundancy design; realizing high power density, with maximum efficiency of 97.5%; having grid-connected charge and discharge and off-grid independent inverter functions.

[0051] It also includes a voltage management module 4, which is used to control the energy storage inverter module 2 to output a compensation voltage with variable amplitude and phase angle in series between the intelligent energy storage power station system and the load when a voltage sag fault occurs, for full management of voltage sag, voltage swell and short-time interruption of the power grid, which is equivalent to a controllable parallel voltage source, thereby ensuring the stability of the load power supply voltage.

[0052] The voltage management module 4 includes an input switch, an output switch, a maintenance bypass switch, a thyristor, an inverter and a super capacitor; the input switch, the thyristor and the output switch are connected in series, one end of the input switch is electrically connected with the power grid, one end of the output switch is electrically connected with the load, the maintenance bypass switch is connected in parallel between one end of the input switch and one end of the output switch, one end of the inverter is connected between the thyristor and the output switch, and the other end of the inverter is electrically connected with the super capacitor.

[0053] The voltage management module 4 is connected in series between the power grid and the load, and detects the input voltage in real time.

[0054] When the input voltage is within the allowable fluctuation range, which is ±15% by default and can be adjusted according to actual conditions, the SCR is turned on, the voltage management module works in a hot backup state, and the super capacitor is charged as needed. The inverter has the functions of reactive power compensation and harmonic management, can manage harmonics and compensate for reactive power, and improves the quality of the power grid.

[0055] When the input voltage exceeds the rated voltage ±15%, the SCR is quickly turned off, and the inverter provides continuous and safe power supply for the load; the compensation time configuration can be adjusted by adjusting the super capacitor configuration to adjust the compensation time. When the input voltage returns to normal, the voltage management module returns to the hot backup state.

[0056] When the system needs to be maintained, the maintenance bypass is manually closed, and the input switch and the output switch are disconnected, so that the entire system can be maintained with uninterrupted power supply.

[0057] The voltage management module 4 has a wide range of compensated input voltage, the compensation time can be adjusted by adjusting the configuration of the super capacitor, the response time is short, the efficiency is greater than 99%, the cost is reduced and the energy is saved. Full management: voltage sag, temporary rise and short interruption perfectly solve various power grid problems, the voltage waveform after the voltage management module 4 management is close to sine wave, which can ensure the stable operation of the rear-end load. Typical switching time < 2ms, when the power grid occurs sag, the typical switching time of the voltage management module 4, from detecting the fault occurrence to the system completing the compensation action, can be controlled within 2ms, which ensures the safe operation of the load. It has the functions of reactive power compensation and harmonic control, when the input voltage range of the power grid is within 380V / 400V±15% (can be set), the reactive power compensation and harmonic control function can be manually started in the touch screen of the voltage management module 4, the inverter real-time tracks the power grid voltage, effectively corrects the power grid voltage and current waveform, significantly reduces the THDI of the power grid when the nonlinear load is connected, and provides reactive power compensation at the same time, eliminates the leading or lagging reactive power of 50 / 60Hz. The harmonic current THDI of the input power source after compensation can be controlled at about 5%, and the power factor is greater than 0.9. It can record the related information at the moment of fault occurrence, including voltage sag depth, voltage sag duration, etc., which provides valuable data for fault cause analysis. It realizes the function of power grid fault event statistics, counts the number of power grid faults per year and per month, different voltage change depth and duration, forms chart data, and facilitates operation and maintenance personnel to query and analyze.

[0058] The super capacitor itself has stable characteristics and significant advantages, combined with perfect super capacitor monitoring and management, which can ensure the advancement, safety and reliability of the whole system. The super capacitor has the following advantages: (1) high number of charge and discharge: the number of charge and discharge of the super capacitor is more than 500,000 times, which has obvious advantages over lead-acid batteries or lithium batteries; (2) high power density: the power density of the super capacitor is several times that of lithium batteries, which can charge and discharge with large current, and is very suitable for anti-flicker applications; (3) maintenance-free: the super capacitor is maintenance-free throughout its life cycle, which greatly reduces maintenance costs; (4) standard test: in the super capacitor standard, the super capacitor must pass the following strict tests to be qualified, such as short circuit test, high and low temperature test, overcharge and overdischarge test, puncture test, extrusion test, heating test, etc. During the test, the super capacitor is required to be explosion-proof, fireproof and liquid-tight; (5) monitoring and management function: it has complete super capacitor monitoring and management function. It can detect the voltage, current and other information of the super capacitor at any time. When the super capacitor has abnormal conditions such as overvoltage or overtemperature, it will display related information, issue sound and light alarm and take corresponding protection measures to ensure the safety and reliability of the system.

[0059] The industrial control module 3 further comprises a fire detection and control module, which comprises a plurality of fire environment sensors arranged in the plurality of batteries of the battery module for monitoring environmental temperature, gas composition, VOC and smoke concentration.

[0060] The fire detection and control module monitors information such as environmental temperature, gas composition, VOC and smoke concentration through the fire environment sensors arranged inside each closed battery box, and can accurately detect the position of the fire in the intelligent energy storage power station system in early stage by judging the information of thermal runaway of the battery module, and give early warning according to the preset alarm plan, and instantaneously start the gas fire prevention and control measures when detecting the fire, so as to control the fire in the smallest range, and simultaneously give sound and light alarm and gas leakage alarm in the intelligent energy storage power station system after the fire extinguishing system is launched. When detecting the abnormality in the space for storing the battery module in groups, the abnormality analysis is transmitted to the industrial control module 3, so as to start the fire suppression measures in each region, so as to achieve the effect of preventing the spread of battery thermal runaway. At the same time, the air conditioning, ventilation and other systems can be linked in the first time when the fire occurs through the linkage signal, so as to better achieve the effect of extinguishing the fire. The system detection, alarm, triggering and other information can be communicated with the industrial control module 3 through 485 and CAN signals.

[0061] The industrial control module 3 further comprises a grid-connected line relay protection module for providing time-limited current fast breaking, overcurrent, zero sequence protection, high-frequency tripping, low-frequency tripping, overvoltage and low-voltage protection functions.

[0062] The action outlet time of the energy storage grid-connected cabinet in the total high-voltage room of the intelligent energy storage power station system can be set to 0-100 seconds, and the protection and control device is arranged on the 10kV switch cabinet panel.

[0063] The industrial control module 3 further comprises an electric energy quality monitoring module for monitoring the voltage and current signals of the grid-connected point between the energy storage inverter module 2 and the load, and sending the voltage and current signals of the grid-connected point to the industrial control module 3.

[0064] The electric energy quality monitoring historical data should be saved for at least one year, and the alarm information of the electric energy quality monitoring module should be forwarded to the industrial control module 3 in the form of telemetry and remote signaling, wherein the signals should contain the following information:

[0065] Telecontrol: 10kV grid point voltage deviation out-of-limit alarm; 10kV grid point voltage total distortion rate out-of-limit alarm; 10kV grid point current total distortion rate out-of-limit alarm; 10kV grid point voltage negative sequence unbalance degree out-of-limit alarm. Telemetering: 10kV grid point A-phase (line) voltage total harmonic distortion rate; 10kV grid point B-phase (line) voltage total harmonic distortion rate; 10kV grid point C-phase (line) voltage total harmonic distortion rate; 10kV grid point A-phase current total harmonic distortion rate; 10kV grid point B-phase current total harmonic distortion rate; 10kV grid point C-phase current total harmonic distortion rate; 10kV grid point voltage negative sequence unbalance degree; 110kV grid point current negative sequence unbalance degree.

[0066] The industrial control module 3 further comprises an automation monitoring module for monitoring each device unit of the intelligent energy storage power station system.

[0067] Main functions include:

[0068] 1) Monitor the voltage and frequency of the energy storage inverter module, BMS and power grid;

[0069] 2) Display the summary and graphic text of the energy storage power station system;

[0070] 3) Display the online data of any one energy storage converter, such as state, power, voltage, current, temperature and alarm condition;

[0071] 4) Display the three-phase current, circuit breaker and disconnector position signal and fault signal of any one power distribution device;

[0072] 5) Control the actual active power and reactive power of the whole system;

[0073] 6) Display advanced power curves, including power curve, distribution curve calculation availability;

[0074] 7) Display the power generation;

[0075] 8) Display the 10-minute collected data. The 10-minute data includes average value, standard deviation, and maximum and minimum value during this period;

[0076] 9) Display the alarm and event record of the whole energy storage power station system and single machine;

[0077] 10) Remote control of single energy storage converter: start, pause, standby, active output, reactive output;

[0078] 11) Remote control of single step-up transformer high and low voltage side switch opening and closing.

[0079] The automation monitoring module monitors each device unit of the intelligent energy storage power station system, adopts a hierarchical distributed network structure, and the energy storage unit should upload information according to the related requirements of the preset scheme.

[0080] The automatic monitoring module is divided into a station control layer and a bay layer, and a single Ethernet structure is adopted. The station control layer is provided with a remote workstation. The bay layer is configured according to bays to realize on-site monitoring functions. The monitoring range includes 10kV switch cabinets of booster access points, public equipment, energy storage inversion modules, BMS, etc. The control mode includes the following three cases: a. remote (central control station) operation; b. automatic monitoring module background operation; and c. on-site (power distribution device) operation.

[0081] In order to enable the automatic monitoring module to operate safely and reliably, corresponding safety and protection measures are required. For example: a. setting operation permissions: according to the size of operator permissions, the use range of operators on the system and various business activities is specified; b. operation uniqueness: in multiple operation modes, if one operation mode is determined, other operation modes must be locked; c. the computer will perform command legality check and lock condition check on any operation of the operating personnel; and d. the operation should be performed in the steps of selection, verification and execution.

[0082] In the description of the present specification, the description referring to the terms "embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0083] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An intelligent energy storage power plant system, characterized in that, The energy storage battery module, the energy storage inverter module and the industrial control module are connected in series. The energy storage battery module is connected with the energy storage inverter module and used as an energy storage unit for charging and discharging. The energy storage inverter module is connected with the load and the power grid and used for adjusting voltage, frequency and power to realize constant power and constant current charging and discharging and smooth fluctuation of power supply output. The industrial control module is connected with the energy storage battery module and the energy storage inverter module and used for controlling the energy storage battery module and the energy storage inverter module.

2. The intelligent energy storage power station system of claim 1, wherein, The energy storage battery module includes a battery module and a battery management module, the battery module includes a plurality of batteries, the battery management module is connected with the battery module and used for collecting voltage, current and temperature, diagnosing SOC, estimating SOH and maintaining the balance of the battery module, and sending information of the battery module to the industrial control module, the industrial control module receives the information uploaded by the battery management module and controls the energy storage inverter module to charge and discharge the battery module.

3. The intelligent energy storage power station system of claim 2, wherein, The battery management module includes a master control unit, a main control unit and a slave control unit, the main control unit is used for overall control of the battery management module, the main control unit is used for slave control of the battery management module, and the slave control unit is used for information collection and management of the battery module.

4. The intelligent energy storage power station system of claim 1, wherein, The energy storage inverter module includes a direct current switch, a fuse, a contactor, an inverter bridge, a transformer and a contactor, the direct current switch, the fuse, the contactor, the inverter bridge, the transformer and the contactor are connected in series, one end of the direct current switch is connected with the energy storage battery module, and one end of the contactor is connected with the load and the power grid.

5. The intelligent energy storage power station system of claim 1, wherein, The voltage management module is further included and used for controlling the energy storage inverter module to output a compensation voltage with variable amplitude and phase angle in series between the intelligent energy storage power station system and the load when a voltage sag fault occurs, so as to realize overall management of voltage sag, voltage swell and short-time interruption of the power grid.

6. The intelligent energy storage power station system of claim 5, wherein, The voltage management module includes an input switch, an output switch, a maintenance bypass switch, a thyristor, an inverter and a super capacitor, the input switch, the thyristor and the output switch are connected in series, one end of the input switch is connected with the power grid, one end of the output switch is connected with the load, the maintenance bypass switch is connected in parallel between one end of the input switch and one end of the output switch, one end of the inverter is connected between the thyristor and the output switch, and the other end of the inverter is connected with the super capacitor.

7. The intelligent energy storage power station system of claim 1, wherein, The industrial control module further includes a fire detection and control module, the fire detection and control module includes a plurality of fire environment sensors arranged in the plurality of batteries of the battery module and used for monitoring environmental temperature, gas composition, VOC and smoke density. 8.The intelligent energy storage power station system of claim 1, wherein, The industrial control module further includes a grid-connected line relay protection module and used for providing time-limited current quick breaking, overcurrent, zero sequence protection, high-frequency tripping, low-frequency tripping, overvoltage and low-voltage protection functions. 9.The intelligent energy storage power station system of claim 1, wherein, The industrial control module further comprises an electric energy quality monitoring module for monitoring voltage and current signals of a grid connection point between the energy storage inverter module and the load and sending the voltage and current signals of the grid connection point to the industrial control module. 10.The intelligent energy storage power station system of claim 1, wherein, The industrial control module further comprises an automation monitoring module for monitoring each device unit of the intelligent energy storage power station system.

Images