A governance method and related device of a multifunctional emergency mobile energy storage power supply

Abstract

The application discloses a kind of multifunctional emergency mobile energy storage power supply governance method and related device, method includes: obtaining governance demand, according to governance demand initialization operating parameter and enter corresponding governance mode;If governance demand is associated with commercial power, call preset mobile energy storage power supply access commercial power and enter power quality governance mode, detect the lithium battery voltage of preset mobile energy storage power supply and commercial power voltage, according to detection result to commercial power carries out power quality governance operation strategy;If governance demand is associated with load, enter emergency power generation mode, control preset mobile energy storage power supply and carry out power supply energy storage, after power supply energy storage ends, call preset mobile energy storage power supply access load and supply power for load, lithium battery voltage of preset mobile energy storage power supply is detected in power supply process, according to detection result executes load governance operation strategy, provides stable power governance function for power grid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile energy storage power supply, and in particular to a management method of a multifunctional emergency mobile energy storage power supply and related devices. BACKGROUND

[0002] With the continuous growth of market demand for mobile energy storage power supply, mobile energy storage power supply technology is constantly improving and upgrading to meet the needs of different users in various use scenarios such as travel, outdoor work, and emergency. Current mobile energy storage power supply mainly develops in the direction of large capacity, large power, and portability, and it is difficult to achieve substantial innovation in function. In the face of the instability brought by the access of new energy such as photovoltaic and wind power to the power grid, and the unstable voltage of the power grid in remote places, the existing mobile energy storage power supply has obvious shortcomings in function, especially the lack of power quality management function. And due to the lack of this key function, the mobile energy storage power supply cannot effectively feed back the power quality of the power grid when it is connected to the power grid. This not only limits its application range in power grid support, but also may have a negative impact on the stability and reliability of the power grid due to the inability to provide necessary power quality regulation function. SUMMARY

[0003] The present application provides a management method of a multifunctional emergency mobile energy storage power supply and related devices, which is used to solve the technical problem that the existing mobile energy storage power supply lacks power quality management function and cannot participate in the power quality management of the power grid, thereby affecting the operation of the power grid system.

[0004] The present application provides a management method of a multifunctional emergency mobile energy storage power supply, which comprises:

[0005] Obtain the management requirement, initialize the operation parameter according to the management requirement and enter the corresponding management mode;

[0006] If the management requirement is associated with the mains, call the preset mobile energy storage power supply to access the mains and enter the power quality management mode, detect the lithium battery voltage of the preset mobile energy storage power supply and the mains voltage, and perform power quality management operation strategy on the mains according to the detection result;

[0007] If the management requirement is associated with the load, enter the emergency power generation mode, control the preset mobile energy storage power supply to supply power and store energy; after the power supply and energy storage are completed, call the preset mobile energy storage power supply to access the load and supply power to the load, and detect the lithium battery voltage of the preset mobile energy storage power supply during the power supply process, and execute the corresponding load management operation strategy according to the detection result.

[0008] Optionally, the preset mobile energy storage power supply comprises a charge-discharge control module and a topology circuit module; the topology circuit module comprises a lithium battery, a sampling detection system, a bidirectional full-bridge DC / DC converter and a bidirectional full-bridge DC / AC converter;

[0009] The charge-discharge control module is configured to control the operation state of the topology circuit module according to the received control signal.

[0010] The sampling detection system is connected to the lithium battery and configured to detect the state of the lithium battery voltage; the bidirectional full-bridge DC / DC converter is connected to the lithium battery and configured to perform bidirectional step-up / down conversion on the direct current voltage of the lithium battery to adapt to different management modes; the bidirectional full-bridge DC / AC converter is connected to the bidirectional full-bridge DC / DC converter through a capacitor C2 and connected to a target through an external interface, and is configured to perform bidirectional conversion between direct current voltage and alternating current voltage, thereby realizing bidirectional flow of energy.

[0011] Optionally, if the management demand is associated with the commercial power, the preset mobile energy storage power supply is called to access the commercial power and enter the power quality management mode, the lithium battery voltage of the preset mobile energy storage power supply and the commercial power voltage are detected, and the step of performing power quality management operation strategy on the commercial power according to the detection result comprises:

[0012] If the management demand is associated with the commercial power, the preset mobile energy storage power supply is called to access the commercial power and enter the power quality management mode.

[0013] If a grid-connected working mode signal is received, the amplitude and phase angle of the commercial power are tracked.

[0014] It is detected whether the lithium battery voltage is normal, if the lithium battery voltage is abnormal, abnormal information of the lithium battery voltage is generated, and the preset mobile energy storage power supply is controlled to enter a standby mode.

[0015] If the lithium battery voltage is normal, the amplitude and phase angle of the commercial power are determined according to the collected commercial power, and it is judged whether the commercial power voltage is normal.

[0016] If the commercial power voltage is abnormal, the preset mobile energy storage power supply is called to perform charge-discharge operation on the commercial power according to the abnormal state of the commercial power voltage.

[0017] During the charge-discharge process, if an abnormal protection mechanism is triggered, fault information is generated according to the triggered abnormal protection mechanism, and the preset mobile energy storage power supply is controlled to enter a standby mode.

[0018] Optionally, if the utility voltage is abnormal, the step of calling the preset mobile energy storage power supply to perform charging and discharging operation on the utility voltage according to the abnormal state of the utility voltage comprises:

[0019] When the utility voltage amplitude is lower than the set minimum value, calling the preset mobile energy storage power supply to output power to the utility voltage for discharging;

[0020] When the utility voltage amplitude is higher than the set maximum value, calling the preset mobile energy storage power supply to absorb power from the utility voltage for charging energy storage;

[0021] When the utility voltage returns to normal and the power transmission between the preset mobile energy storage power supply and the utility voltage is detected to drop to zero, controlling the preset mobile energy storage power supply to enter standby mode.

[0022] Optionally, if the management demand is associated with the load, entering emergency power generation mode, controlling the preset mobile energy storage power supply to perform power supply and energy storage, after the power supply and energy storage is completed, calling the preset mobile energy storage power supply to access the load and supply power to the load, detecting the lithium battery voltage of the preset mobile energy storage power supply during the power supply process, and executing corresponding load management operation strategy according to the detection result.

[0023] If the management demand is associated with the load, entering emergency power generation mode, controlling the preset mobile energy storage power supply to perform power supply and energy storage, after the power supply and energy storage is completed, calling the preset mobile energy storage power supply to access the load and supply power to the load;

[0024] During the power supply to the load, if it is detected that the lithium battery voltage is abnormal, generating abnormal information of the lithium battery voltage, and controlling the preset mobile energy storage power supply to enter standby mode; if the abnormal protection mechanism is triggered, generating fault information according to the triggered abnormal protection mechanism, and controlling the preset mobile energy storage power supply to enter standby mode;

[0025] When the exit signal is received, stopping the preset mobile energy storage power supply from supplying power to the load, and controlling the preset mobile energy storage power supply to enter standby mode.

[0026] Optionally, the step of calling the preset mobile energy storage power supply to output power to the utility voltage for discharging when the utility voltage amplitude is lower than the set minimum value comprises:

[0027] When the utility voltage amplitude is lower than the set minimum value, the topology circuit module is switched to grid-connected discharging state by the charging and discharging control module;

[0028] In the topology circuit module, the relay RY1 of the bidirectional full-bridge DC / AC converter is closed, the bidirectional full-bridge DC / DC converter is controlled to be in a reverse working state; the lithium battery outputs power to the capacitor C2 through the bidirectional full-bridge DC / DC converter;

[0029] When it is detected that the voltage of the capacitor C2 is lifted to 400V, the bidirectional full-bridge DC / AC converter is controlled to work in a grid-connected discharging state; the direct current voltage of the lithium battery is converted into alternating current voltage by the bidirectional full-bridge DC / AC converter and is delivered to the commercial power in a grid-connected manner.

[0030] Optionally, when the amplitude of the commercial power voltage is higher than the set maximum value, the step of calling the preset mobile energy storage power to absorb power from the commercial power for charging and energy storage comprises:

[0031] When the amplitude of the commercial power voltage is higher than the set maximum value, the topology circuit module is switched to a grid-connected charging state by the charging and discharging control module;

[0032] In the topology circuit module, the relay RY2 and the relay RY4 of the bidirectional full-bridge DC / AC converter are closed, the alternating current voltage output by the commercial power is converted into direct current voltage by the rectification full-bridge UR of the bidirectional full-bridge DC / AC converter, and the energy of the direct current voltage is delivered to the capacitor C2;

[0033] When it is detected that the voltage of the capacitor C2 is lifted to 300V, the relay RY2 and the relay RY4 of the bidirectional full-bridge DC / AC converter are opened, the relay RY1 of the bidirectional full-bridge DC / AC converter is closed, and the voltage of the capacitor C2 is lifted to 400V by the bidirectional full-bridge DC / AC converter;

[0034] The bidirectional full-bridge DC / AC converter is controlled to work in a grid-connected charging state, and the bidirectional full-bridge DC / DC converter is controlled to work in a forward working state, so that the commercial power outputs power to the bidirectional full-bridge DC / AC converter, the energy output by the commercial power is converted into direct current voltage by the bidirectional full-bridge DC / AC converter, and the direct current voltage is delivered to the lithium battery by the bidirectional full-bridge DC / DC converter.

[0035] Optionally, if the management demand is associated with the load, an emergency power generation mode is entered, the preset mobile energy storage power is controlled to supply power and store energy, and after the supply and energy storage end, the step of calling the preset mobile energy storage power to access the load and supply power to the load comprises:

[0036] If the management demand is associated with the load, an emergency power generation mode is entered, and the topology circuit module is switched to an emergency power generation state by the charging and discharging control module.

[0037] In the topological circuit module, the relay RY1 of the bidirectional full-bridge DC / AC converter is closed, the bidirectional full-bridge DC / DC converter is controlled to be in a reverse working state; the lithium battery outputs power to the capacitor C2 through the bidirectional full-bridge DC / DC converter;

[0038] When it is detected that the voltage of the capacitor C2 is lifted to 400V, the bidirectional full-bridge DC / AC converter is controlled to work in an inverting state; the direct current voltage of the lithium battery is converted into 220V alternating voltage through the bidirectional full-bridge DC / AC converter;

[0039] The preset mobile energy storage power supply is called to access the load, and the bidirectional full-bridge DC / AC converter supplies 220V alternating voltage to the load.

[0040] The application further provides a computer device, which comprises a memory, a processor and a computer program stored in the memory, and the processor executes the computer program to realize the steps of the management method of the multifunctional emergency mobile energy storage power supply.

[0041] The application further provides a computer readable storage medium, which stores a computer program / instruction, and the computer program / instruction is executed by a processor to realize the steps of the management method of the multifunctional emergency mobile energy storage power supply.

[0042] From the above technical solutions, it can be seen that the application has the following advantages:

[0043] The application provides a management method of a multifunctional emergency mobile energy storage power supply and related devices, and the method comprises the following steps: acquiring a management demand, initializing running parameters according to the management demand and entering a corresponding management mode; if the management demand is associated with commercial power, calling a preset mobile energy storage power supply to access the commercial power and entering an electric energy quality management mode, detecting the voltage of a lithium battery of the preset mobile energy storage power supply and the voltage of the commercial power, and performing an electric energy quality management running strategy on the commercial power according to the detection result; if the management demand is associated with a load, entering an emergency power generation mode, controlling the preset mobile energy storage power supply to supply power and store energy, calling the preset mobile energy storage power supply to access the load and supplying power for the load after the supply and energy storage are completed; and detecting the voltage of the lithium battery of the preset mobile energy storage power supply during the power supply process, and performing a corresponding load management running strategy according to the detection result.

[0044] In different electric energy management scenarios, the preset mobile energy storage power source flexibly responds and switches the corresponding electric energy management mode to meet diversified power demand. Through monitoring and management of the mains by the preset mobile energy storage power source, the stability and reliability of the mains are ensured; through emergency power generation of the load by the preset mobile energy storage power source, stable power support is provided for the load, thereby providing stable electric energy management function for the power grid, and thus solving the technical problems that the existing mobile energy storage power source lacks electric energy quality management function and cannot participate in the electric energy quality management of the power grid and other work scenarios, thereby affecting the operation of the power grid system. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0046] Figure 1 A step flow chart of a multifunctional emergency mobile energy storage power source management method provided by the embodiment of the present application;

[0047] Figure 2 A circuit diagram of a topology circuit module of the preset mobile energy storage power source provided by the embodiment of the present application;

[0048] Figure 3 An execution flow chart of electric energy management in the electric energy quality management mode provided by the embodiment of the present application;

[0049] Figure 4 An execution flow chart of electric energy management in the emergency power generation mode provided by the embodiment of the present application;

[0050] Figure 5 An electric energy management switching flow chart of the electric energy quality management mode and the emergency power generation mode provided by the embodiment of the present application. DETAILED DESCRIPTION

[0051] The embodiment of the present application provides a multifunctional emergency mobile energy storage power source management method and related device, which is used to solve the technical problem that the mobile energy storage power source lacks electric energy quality management function and cannot participate in the electric energy quality management of the power grid and other work scenarios, thereby affecting the operation of the power grid system.

[0052] In order to make the application purposes, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the following described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0053] Referring to Figure 1 The present application provides a management method of a multifunctional emergency mobile energy storage power supply, which comprises the following steps:

[0054] In step 101, the management demand is obtained, the running parameters are initialized according to the management demand, and the corresponding management mode is entered.

[0055] It should be noted that the management demand can be the management demand of the power grid commercial power or the management demand of the power grid load. In view of the fact that the existing mobile energy storage power supply lacks power quality management function and cannot participate in the management work of the power quality of the power grid, etc., the present application optimizes the hardware design, integrates the commercial power management and emergency power generation management principles, and designs a preset mobile energy storage power supply.

[0056] Referring to Figure 2 The preset mobile energy storage power supply provided in the embodiment comprises a charge-discharge control module and a topology circuit module; the topology circuit module comprises a lithium battery, a sampling detection system, a bidirectional full-bridge DC / DC converter and a bidirectional full-bridge DC / AC converter.

[0057] The charge-discharge control module is used for controlling the running state of the topology circuit module according to the received control signal.

[0058] The sampling detection system is connected with the lithium battery and is used for detecting the state of the lithium battery voltage; the bidirectional full-bridge DC / DC converter is connected with the lithium battery and is used for bidirectional step-up / down conversion of the direct current voltage of the lithium battery to adapt to different management modes; the bidirectional full-bridge DC / AC converter is connected with the bidirectional full-bridge DC / DC converter through the capacitor C2, and the bidirectional full-bridge DC / AC converter is connected with the access target through the outer interface, and is used for bidirectional conversion of the direct current voltage and the alternating current voltage, so as to realize bidirectional flow of energy.

[0059] In practical applications, the lithium battery assembly can adopt 48V ternary lithium battery with high energy density, fast charging efficiency, high safety and portability. In order to realize the functions of grid-connected power quality management and emergency power generation, the present application selects a bidirectional full-bridge DC / DC converter and a bidirectional full-bridge DC / AC converter as the main device, i.e. a bidirectional converter, which can realize high-power transmission and quickly change the direction of energy transmission. In addition, the relay switch is designed on a separate PCB board, which can realize a high-power operating state of up to 10A current by increasing the copper area.

[0060] In addition, in order to improve the service life of the mobile energy storage power supply, different components can adopt different connection methods according to different power requirements. For example, the main power circuit between the lithium battery assembly, the relay switch and the bidirectional converter is connected by a high-power pluggable wire, while the signal transmission circuit between the charge and discharge controller and the display panel is connected by a low-power flat cable, so as to realize the power requirement and optimize the layout of the line.

[0061] In order to improve the operation efficiency of the operator, the preset mobile energy storage power supply is also provided with a display panel and control buttons. Specifically, the display panel can correctly display various operating states and working modes of the mobile energy storage power supply, including unpowered state, standby state, power quality management mode, emergency power generation mode and fault state, and the displayable parameters include mains voltage, supply voltage, battery SOC and transmission power, so that the current operating state of the mobile energy storage power supply can be clearly and intuitively known. The control buttons can conveniently switch the working mode of the mobile energy storage power supply for the operator, and the control buttons can include power-on button, standby button, grid-connected working button, power quality management button and emergency power generation mode button; the charge and discharge control module controls the operating state of the topology circuit module according to the control signal sent by the control button.

[0062] In Figure 2 , the power supply battery and protection system is composed of lithium battery and sampling detection system; wherein the power supply battery and protection system connects the bidirectional full-bridge DC / DC converter through the relay RY3 and the relay RY5; and the capacitor C1 and the capacitor C2 are low-voltage side voltage stabilizing capacitor and high-voltage side voltage stabilizing capacitor respectively; the bidirectional full-bridge DC / AC converter connects the mains or load through the relay RY1, the relay RY2 and the relay RY4, which can realize the bidirectional conversion from direct current to alternating current, so that the electric energy flows bidirectionally in the whole system.

[0063] The bidirectional full-bridge DC / DC converter provided in the embodiment comprises switch tubes S1-S8, a transformer T, an excitation inductor Lm, a resonant inductor Lr and a filter capacitor Cr. The bidirectional full-bridge DC / AC converter provided in the embodiment comprises switch tubes S9-S12, an inductor L1, a rectification full-bridge UR, relays RY1, RY2 and RY3. In particular, the present application can realize control switching of different governance states by cooperation of different relays, so that the mobile energy storage power supply has functions of emergency power generation and power quality governance.

[0064] In the embodiment, after receiving the governance demand, the hardware interface and the parameter variable can be initialized first, and then the corresponding governance mode is entered, and then the power quality governance in different scenes is realized by the preset mobile energy storage power supply according to different governance modes.

[0065] In step 102, if the governance demand is associated with the commercial power, the preset mobile energy storage power supply is called to access the commercial power and enter the power quality governance mode, the voltage of the lithium battery of the preset mobile energy storage power supply and the voltage of the commercial power are detected, and the power quality governance operation strategy of the commercial power is performed according to the detection result.

[0066] It should be noted that in the power quality governance mode, when the commercial power fluctuates, the voltage of the commercial power can be detected and adjusted in real time by the preset mobile energy storage power supply to perform commercial power governance, so as to ensure the operation stability and reliability of the commercial power.

[0067] Please refer to Figure 3 and Figure 5 , the step specifically comprises:

[0068] In step S10, if the governance demand is associated with the commercial power, the preset mobile energy storage power supply is called to access the commercial power and enter the power quality governance mode.

[0069] In step S11, if a grid-connected working mode signal is received, the amplitude and phase angle of the commercial power are tracked.

[0070] It can be understood that after entering the power quality governance mode, if a grid-connected working mode signal is received, the commercial power needs to be processed in the grid-connected mode, such as tracking the amplitude and phase angle of the commercial power. Before tracking the amplitude and phase angle of the commercial power, it is also necessary to determine whether the preset mobile energy storage power supply is connected to the commercial power and whether the operation parameters are initialized. In the grid-connected working mode, the parameter variables in the operation parameters can include the voltage of the lithium battery, the remaining power, the voltage amplitude, the frequency and the phase angle of the external interface, etc.

[0071] In step S12, it is detected whether the voltage of the lithium battery is normal, if the voltage of the lithium battery is abnormal, abnormal information of the voltage of the lithium battery is generated, and the preset mobile energy storage power supply is controlled to enter the standby mode.

[0072] It should be noted that in the standby mode, the relay RY3 and the relay RY5 of the preset mobile energy storage power supply are closed, and the relay RY1, the relay RY2 and the relay RY4 are disconnected, so that the battery energy of the preset mobile energy storage power supply cannot be leaked to ensure the safety of the power management, and the mobile energy storage power supply can be put into the management state at any time.

[0073] In step S13, if the voltage of the lithium battery is normal, the voltage of the commercial power is determined according to the amplitude and phase angle of the collected commercial power, and it is judged whether the voltage of the commercial power is normal.

[0074] It should be noted that after the voltage of the commercial power is determined according to the amplitude and phase angle of the collected commercial power, it is judged whether the voltage of the commercial power is normal according to the preset voltage range; in the normal operation state, the voltage amplitude of the commercial power is in a certain range interval. If the amplitude of the voltage of the commercial power is in the preset voltage range, it is judged that the commercial power is in the normal state; otherwise, it is considered that the commercial power is in the abnormal state.

[0075] In step S14, if the voltage of the commercial power is abnormal, the preset mobile energy storage power supply is called to enter the charging and discharging operation according to the abnormal state of the voltage of the commercial power.

[0076] In this embodiment, if the voltage of the commercial power is abnormal, the preset mobile energy storage power supply needs to manage the power of the commercial power to ensure the reliability and safety of the operation of the commercial power.

[0077] In step S15, during the charging and discharging process, if the abnormal protection mechanism is triggered, the fault information is generated according to the triggered abnormal protection mechanism, and the preset mobile energy storage power supply is controlled to enter the standby mode.

[0078] In this embodiment, the condition of triggering the abnormal protection mechanism can be triggering the overvoltage, overcurrent, overtemperature or undervoltage protection mechanism; after triggering the abnormal protection mechanism, the power management process needs to be stopped immediately, that is, the energy exchange between the mobile energy storage power supply and the commercial power is stopped, and the fault information is displayed through the state indicating lamp, and whether to completely exit the power management is judged by the operator.

[0079] Further, if the voltage of the commercial power is abnormal, the process of calling the preset mobile energy storage power supply to enter the charging and discharging operation according to the abnormal state of the voltage of the commercial power, which specifically includes:

[0080] In step S20, when the amplitude of the voltage of the commercial power is lower than the set minimum value, the preset mobile energy storage power supply is called to output power to the commercial power for discharging.

[0081] In the normal operation state, the voltage amplitude of the commercial power is in the preset voltage range. If the voltage amplitude of the commercial power is lower than the set minimum value in the preset voltage range, it indicates that the commercial power is insufficient or the voltage is too low. At this time, the preset mobile energy storage power supply can be called to output power to the commercial power to discharge to ensure the normal operation of the commercial power.

[0082] In the embodiment, when the voltage amplitude of the commercial power is lower than the set minimum value, the circuit working process of the topology circuit module of the preset mobile energy storage power supply includes: when the voltage amplitude of the commercial power is lower than the set minimum value, the topology circuit module is switched to the grid-connected discharging state by the charge-discharge control module; in the topology circuit module, the relay RY1 of the bidirectional full-bridge DC / AC converter is closed, and the bidirectional full-bridge DC / DC converter is controlled to be in the reverse working state; the lithium battery outputs power to the capacitor C2 through the bidirectional full-bridge DC / DC converter; wherein the voltage at the capacitor C2 corresponds to the bus voltage;

[0083] When it is detected that the voltage at the capacitor C2 is lifted to 400V, the bidirectional full-bridge DC / AC converter is controlled to work in the grid-connected discharging state; the direct current voltage of the lithium battery is converted into alternating current voltage by the bidirectional full-bridge DC / AC converter and is delivered to the commercial power in the grid-connected manner. At this time, the output voltage and the output current of the preset mobile energy storage power supply are in the nearly opposite state.

[0084] Step S21, when the voltage amplitude of the commercial power is higher than the set maximum value, the preset mobile energy storage power supply is called to absorb power from the commercial power to charge and store energy.

[0085] If the voltage amplitude of the commercial power is higher than the set maximum value in the preset range, it indicates that the voltage of the commercial power is too high. At this time, the preset mobile energy storage power supply can be called to absorb power from the commercial power to store energy to ensure the normal operation of the commercial power.

[0086] In the embodiment, when the voltage amplitude of the commercial power is higher than the set maximum value, the circuit working process of the topology circuit module of the preset mobile energy storage power supply includes: when the voltage amplitude of the commercial power is higher than the set maximum value, the topology circuit module is switched to the grid-connected charging state by the charge-discharge control module; in the topology circuit module, the relays RY2 and RY4 of the bidirectional full-bridge DC / AC converter are closed, the alternating current voltage output by the commercial power is converted into direct current voltage by the rectification full-bridge UR of the bidirectional full-bridge DC / AC converter, and the energy of the direct current voltage is delivered to the capacitor C2;

[0087] When the voltage of the capacitor C2 is detected to be lifted to 300V, the relays RY2 and RY4 of the bidirectional full-bridge DC / AC converter are turned off, the relay RY1 of the bidirectional full-bridge DC / AC converter is turned on, the voltage of the capacitor C2 is lifted to 400V by controlling the bidirectional full-bridge DC / AC converter, at this time, the bidirectional full-bridge DC / AC converter works in the grid-connected charging state, and the bidirectional full-bridge DC / DC converter works in the forward working state, so that the mains output power is output to the bidirectional full-bridge DC / AC converter, the energy output by the mains is converted into a direct-current voltage by the bidirectional full-bridge DC / AC converter, and the direct-current voltage is transmitted to the lithium battery through the bidirectional full-bridge DC / DC converter, so as to realize charging of the preset mobile energy storage power supply by the mains, at this time, the output voltage and the output current of the preset mobile energy storage power supply are in the nearly in-phase state.

[0088] Step S22, when the mains is restored to normal and the power transmission between the preset mobile energy storage power supply and the mains is detected to be zero, the preset mobile energy storage power supply is controlled to enter the standby mode.

[0089] It can be understood that if there is no abnormal situation in the process of energy management, the preset mobile energy storage power supply can be controlled to enter the standby mode to wait for the next round of energy management work after the preset mobile energy storage power supply and the mains complete the entire grid-connected power quality management work.

[0090] Step 103, if the management demand is associated with the load, an emergency power generation mode is entered, the preset mobile energy storage power supply is controlled to perform power supply and energy storage, after the power supply and energy storage is completed, the preset mobile energy storage power supply is called to access the load and supply power to the load, and the voltage of the lithium battery of the preset mobile energy storage power supply is detected during the power supply process, and a corresponding load management operation strategy is executed according to the detection result.

[0091] Please refer to Figure 4 and Figure 5 , this step specifically includes:

[0092] Step S30, if the management demand is associated with the load, an emergency power generation mode is entered, the preset mobile energy storage power supply is controlled to perform power supply and energy storage, after the power supply and energy storage is completed, the preset mobile energy storage power supply is called to access the load and supply power to the load.

[0093] It should be noted that when power failure or rescue and first-aid occurs, the preset mobile energy storage power supply can quickly respond and switch to the emergency power generation mode to provide stable power support for the key load.

[0094] In the present embodiment, in the emergency power generation mode, the preset mobile energy storage power supply circuit working process includes: in the emergency power generation mode, the topology circuit module is switched to the emergency power generation state by the charge-discharge control module; in the topology circuit module, the relay RY1 of the bidirectional full-bridge DC / AC converter is closed, and the bidirectional full-bridge DC / DC converter is controlled to be in the reverse working state; the lithium battery outputs power to the capacitor C2 through the bidirectional full-bridge DC / DC converter;

[0095] When it is detected that the capacitor C2 voltage rises to 400V, the bidirectional full-bridge DC / AC converter is controlled to work in the inverter state; the direct current voltage of the lithium battery is converted into 220V alternating voltage by the bidirectional full-bridge DC / AC converter; the preset mobile energy storage power supply is connected to the load, and the bidirectional full-bridge DC / AC converter supplies 220V alternating voltage to the load.

[0096] For the convenience of understanding, the working states of the bidirectional full-bridge DC / DC converter and the bidirectional full-bridge DC / AC converter are further described as follows:

[0097] 1) Bidirectional full-bridge DC / DC converter

[0098] In the forward working state, the switching tubes S5-S8 work in the inverter state, and the switching tubes S1-S4 are in the cut-off state; at this time, the four body diodes corresponding to the switching tubes S1-S4 constitute a bridge rectifier, and the energy is transmitted from the right side to the left side of the circuit; in the reverse working state, the switching tubes S1-S4 work in the inverter state, and the switching tubes S5-S8 are in the cut-off state; at this time, the four body diodes corresponding to the switching tubes S5-S8 constitute a bridge rectifier, and the energy is transmitted from the left side to the right side of the circuit.

[0099] Taking a bidirectional full-bridge DC / DC converter operating in the forward mode as an example, the frequency of the drive signal is switched to adjust the switching, achieving simultaneous diagonal switching of the full bridge and staggered switching of the non-diagonal switches, thus completing forward and reverse conduction. Without considering dead time, the duty cycle of each switch is 50%. During the positive half-cycle of one cycle, the drive voltages of S5 and S8 are high, and both are conducting. Current flows from the body diodes of S5 and S8 to the switches of S5 and S8. At this time, the body diodes of S1 and S4 on the left side of transformer T are conducting, charging the lithium battery. Due to the circuit structure characteristics, the current in the body diodes of S1 and S4 will first increase and then gradually decrease. When the drive voltages of S5 and S8 become low, they are turned off, and current flows from the switches of S5 and S8 to the body diodes of S6 and S7. During the negative half-cycle, the driving voltages of S6 and S7 are high, and both are conducting. Current flows from the body diodes of S6 and S7 to the switches of S6 and S7. At this time, the body diodes of S2 and S3 on the left side of transformer T are conducting, charging the lithium battery. Due to the circuit structure characteristics, the current on the body diodes of S2 and S3 will first increase and then gradually decrease. When the driving voltages of S6 and S7 become low, they are turned off, and current flows from the switches of S6 and S7 to the body diodes of S5 and S8, charging the lithium battery.

[0100] 2) Bidirectional full-bridge DC / AC converter

[0101] In grid-connected charging mode, electrical energy flows from the AC side to the DC side. During the first half of a cycle, switches S9 and S12 are turned on, while switches S10 and S11 are turned off. At this time, the current transmission direction is sequentially: the outer interface, switch S9, capacitor C2 and the bidirectional full-bridge DC / DC converter, switch S12, inductor L1 and relay RY1. During the second half of the cycle, switches S10 and S11 are turned on, while switches S9 and S12 are turned off. At this time, the current transmission direction is sequentially: the outer interface, relay RY1, inductor L1, switch S11, capacitor C2 and the bidirectional full-bridge DC / DC converter and switch S10.

[0102] In grid-connected discharge / inverter mode, electrical energy flows from the DC side to the AC side. During the first half of a cycle, switches S10 and S11 are turned on, while switches S9 and S12 are turned off. At this time, the current transmission direction is sequentially: capacitor C2 and the bidirectional full-bridge DC / DC converter, switch S11, inductor L1, relay RY1, external interface, and switch S10. During the second half of the cycle, switches S9 and S12 are turned on, while switches S10 and S11 are turned off. At this time, the current transmission direction is sequentially: capacitor C2 and the bidirectional full-bridge DC / DC converter, switch S9, external interface, relay RY1, inductor L1, and switch S12.

[0103] Step S31, in the process of supplying power to the load, if it is detected that the lithium battery voltage is abnormal, abnormal information of the lithium battery voltage is generated, and the preset mobile energy storage power supply is controlled to enter standby mode; if the abnormal protection mechanism is triggered, fault information is generated according to the triggered abnormal protection mechanism, and the preset mobile energy storage power supply is controlled to enter standby mode.

[0104] After triggering the abnormal protection mechanism, the power management process needs to be stopped immediately, that is, the energy exchange between the mobile energy storage power supply and the load is stopped, and the fault information is displayed through the state indicating lamp, and the operator judges whether to completely exit the power management.

[0105] Step S32, when receiving the exit signal, the preset mobile energy storage power supply stops supplying power to the load, and the preset mobile energy storage power supply enters standby mode.

[0106] It can be understood that if there is no abnormal situation in the power management process, the preset mobile energy storage power supply can be controlled to enter standby mode to wait for the next round of power management work after the entire grid-connected power quality management work between the preset mobile energy storage power supply and the load is completed.

[0107] The management method of the multifunctional emergency mobile energy storage power supply provided by the application has the following advantages:

[0108] 1. According to different power grid application scenarios, different power management modes such as power quality management mode and emergency power generation mode are triggered to meet diversified power demand. When the mains power fluctuates, the mobile energy storage power supply performs mains management by real-time monitoring and adjusting the amplitude and phase angle of the mains power to ensure the stability and reliability of the mains power. When power failure or emergency rescue occurs, the mobile energy storage power supply quickly responds to provide stable power support for critical loads.

[0109] 2. Considering that the existing mobile energy storage power supply lacks corresponding functions in emergency support and mains power quality management work scenarios, the mobile energy storage power supply provided by the application is optimized and improved in hardware, effectively expanding the working mode of the mobile energy storage power supply, and at the same time having the performance of large capacity, high power and portability, so that the mobile energy storage power supply can work flexibly and efficiently in outdoor operation, emergency power supply and smart microgrid scenarios.

[0110] The application further provides a computer device, which comprises a memory, a processor and a computer program stored in the memory, and the processor executes the computer program to realize the steps of the management method of the multifunctional emergency mobile energy storage power supply according to any one of the above.

[0111] The application further provides a computer readable storage medium, which stores a computer program / instruction, and the computer program / instruction is executed by a processor to realize the steps of the management method of the multifunctional emergency mobile energy storage power supply according to any one of the above.

[0112] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0113] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0114] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0115] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0116] When the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0117] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalent replacements; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-functional emergency mobile energy storage power supply management method, characterized in that, The method comprises: obtaining a governance requirement, initializing a running parameter according to the governance requirement, and entering a corresponding governance mode; if the governance requirement is associated with a power grid, calling a preset mobile energy storage power supply to access the power grid and entering an electric energy quality governance mode, detecting a lithium battery voltage of the preset mobile energy storage power supply and a power grid voltage, and executing an electric energy quality governance running strategy on the power grid according to a detection result; if the governance requirement is associated with a load, entering an emergency power generation mode, controlling the preset mobile energy storage power supply to perform power supply and energy storage, after the power supply and energy storage is completed, calling the preset mobile energy storage power supply to access the load and supply power for the load, and detecting the lithium battery voltage of the preset mobile energy storage power supply during the power supply process, and executing a corresponding load governance running strategy according to a detection result; the preset mobile energy storage power supply comprises a charging and discharging control module and a topology circuit module; the topology circuit module comprises a lithium battery, a sampling detection system, a bidirectional full-bridge DC / DC converter and a bidirectional full-bridge DC / AC converter; the charging and discharging control module is used for controlling a running state of the topology circuit module according to a received control signal; the sampling detection system is connected with the lithium battery and is used for detecting a state of the lithium battery voltage; the bidirectional full-bridge DC / DC converter is connected with the lithium battery and is used for performing bidirectional step-up and step-down conversion on a direct current voltage of the lithium battery to adapt to different governance modes; the bidirectional full-bridge DC / AC converter is connected with the bidirectional full-bridge DC / DC converter through a capacitor C2, and is connected with an access target through an external interface, and is used for performing bidirectional conversion between a direct current voltage and an alternating current voltage, so as to realize bidirectional flow of energy; the step of, if the governance requirement is associated with a power grid, calling a preset mobile energy storage power supply to access the power grid and entering an electric energy quality governance mode, detecting a lithium battery voltage of the preset mobile energy storage power supply and a power grid voltage, and executing an electric energy quality governance running strategy on the power grid according to a detection result, comprises: if the governance requirement is associated with a power grid, calling a preset mobile energy storage power supply to access the power grid and entering an electric energy quality governance mode; if a grid-connected working mode signal is received, performing amplitude and phase angle tracking on the power grid; detecting whether the lithium battery voltage is normal, if the lithium battery voltage is abnormal, generating abnormal information of the lithium battery voltage, and controlling the preset mobile energy storage power supply to enter a standby mode; if the lithium battery voltage is normal, determining a power grid voltage according to collected amplitude and phase angle of the power grid, and judging whether the power grid voltage is normal; if the power grid voltage is abnormal, calling the preset mobile energy storage power supply to perform charging and discharging operation on the power grid according to an abnormal state of the power grid voltage; if an abnormal protection mechanism is triggered during the charging and discharging process, generating fault information according to the triggered abnormal protection mechanism, and controlling the preset mobile energy storage power supply to enter a standby mode.

2. The method of claim 1, wherein the multi-functional emergency mobile energy storage power supply is a mobile power supply for a mobile device. the step of, if the power grid voltage is abnormal, calling the preset mobile energy storage power supply to perform charging and discharging operation on the power grid according to an abnormal state of the power grid voltage, comprises: When the amplitude of the mains voltage is lower than the set minimum value, the preset mobile energy storage power supply is called to discharge the output power of the mains; When the amplitude of the mains voltage is higher than the set maximum value, the preset mobile energy storage power supply is called to absorb power from the mains for charging and energy storage; When the mains is restored to normal and the power transmission between the preset mobile energy storage power supply and the mains is detected to drop to zero, the preset mobile energy storage power supply is controlled to enter standby mode.

3. The method of claim 1, wherein the multi-functional emergency mobile energy storage power supply is a mobile power supply. If the management demand is associated with the load, an emergency power generation mode is entered, the preset mobile energy storage power supply is controlled to supply power and store energy, and after the supply and storage of energy is completed, the preset mobile energy storage power supply is called to access the load and supply power to the load. In the process of supplying power, the voltage of the lithium battery of the preset mobile energy storage power supply is detected, and corresponding load management operation strategies are executed according to the detection results, including: If the management demand is associated with the load, an emergency power generation mode is entered, the preset mobile energy storage power supply is controlled to supply power and store energy, and after the supply and storage of energy is completed, the preset mobile energy storage power supply is called to access the load and supply power to the load. In the process of supplying power to the load, if it is detected that the voltage of the lithium battery is abnormal, abnormal information of the voltage of the lithium battery is generated, and the preset mobile energy storage power supply is controlled to enter standby mode; if an abnormal protection mechanism is triggered, fault information is generated according to the triggered abnormal protection mechanism, and the preset mobile energy storage power supply is controlled to enter standby mode; When a quit signal is received, the preset mobile energy storage power supply stops supplying power to the load, and the preset mobile energy storage power supply is controlled to enter standby mode.

4. The method of claim 2, wherein the method further comprises: The step of calling the preset mobile energy storage power supply to discharge the output power of the mains when the amplitude of the mains voltage is lower than the set minimum value includes: When the amplitude of the mains voltage is lower than the set minimum value, the charging and discharging control module is used to control the topology circuit module to switch to a grid-connected discharging state; In the topology circuit module, the relay RY1 of the bidirectional full-bridge DC / AC converter is closed, the bidirectional full-bridge DC / DC converter is controlled to be in a reverse working state, and the lithium battery outputs power to the capacitor C2 through the bidirectional full-bridge DC / DC converter; When it is detected that the voltage of the capacitor C2 rises to 400V, the bidirectional full-bridge DC / AC converter is controlled to work in a grid-connected discharging state, and the DC voltage of the lithium battery is converted into AC voltage by the bidirectional full-bridge DC / AC converter and is transmitted to the mains in a grid-connected manner.

5. The method of claim 2, wherein the method further comprises: The step of calling the preset mobile energy storage power supply to absorb power from the mains for charging and energy storage when the amplitude of the mains voltage is higher than the set maximum value includes: When the amplitude of the mains voltage is higher than the set maximum value, the charging and discharging control module is used to control the topology circuit module to switch to a grid-connected charging state; In the topology circuit module, the relays RY2 and RY4 of the bidirectional full-bridge DC / AC converter are closed, the AC voltage output by the mains is converted into DC voltage by the rectification full-bridge UR of the bidirectional full-bridge DC / AC converter, and the energy of the DC voltage is transmitted to the capacitor C2. When detecting that the voltage of the capacitor C2 is lifted to 300V, the relay RY2 and the relay RY4 of the bidirectional full-bridge DC / AC converter are opened, the relay RY1 of the bidirectional full-bridge DC / AC converter is closed, and the voltage of the capacitor C2 is lifted to 400V through the bidirectional full-bridge DC / AC converter; The bidirectional full-bridge DC / AC converter is controlled to work in a grid-connected charging state, and the bidirectional full-bridge DC / DC converter is controlled to work in a forward working state, so that the mains output power is output to the bidirectional full-bridge DC / AC converter, the energy output by the mains is converted into a direct-current voltage through the bidirectional full-bridge DC / AC converter, and the direct-current voltage is transmitted to the lithium battery through the bidirectional full-bridge DC / DC converter.

6. The method of claim 3, wherein the method further comprises: If the management demand is associated with the load, the emergency power generation mode is entered, the preset mobile energy storage power supply is controlled to supply power and store energy, and after the power supply and energy storage is completed, the preset mobile energy storage power supply is called to access the load and supply power to the load, including: If the management demand is associated with the load, the emergency power generation mode is entered, and the topology circuit module is switched to the emergency power generation state through the charge-discharge control module; In the topology circuit module, the relay RY1 of the bidirectional full-bridge DC / AC converter is closed, and the bidirectional full-bridge DC / DC converter is controlled to be in a reverse working state; the lithium battery outputs power to the capacitor C2 through the bidirectional full-bridge DC / DC converter; When detecting that the voltage of the capacitor C2 is lifted to 400V, the bidirectional full-bridge DC / AC converter is controlled to work in an inverter state; the direct-current voltage of the lithium battery is converted into a 220V alternating voltage through the bidirectional full-bridge DC / AC converter; The preset mobile energy storage power supply is called to access the load, and the bidirectional full-bridge DC / AC converter transmits a 220V alternating voltage to the load.

7. A computer apparatus comprising a memory, a processor, and a computer program stored on the memory, wherein the computer program, when executed by the processor, causes the processor to perform the method of any one of claims 1 to 6. The processor executes the computer program to realize the steps of the management method of the multifunctional emergency mobile energy storage power supply according to any one of claims 1-6.

8. A computer readable storage medium having stored thereon computer programs / instructions, characterized in that, The computer program / instruction is executed by the processor to realize the steps of the management method of the multifunctional emergency mobile energy storage power supply according to any one of claims 1-6.

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