A method for dispatching electric energy

Abstract

The present invention provides an electric energy dispatching method in the field of energy storage dispatching technology, including: step S10, an electrochemical energy storage device creates a local charging dispatching strategy and a local discharging dispatching strategy; step S20, obtaining the grid access status, the current time period, and the power source access status, and controlling the charging and discharging of the battery based on the grid access status, the current time period, the power source access status, the local charging dispatching strategy, and the local discharging dispatching strategy; step S30, the electrochemical energy storage device detects the current working mode; step S40, the cloud creates a cloud dispatching rule; step S50, the cloud communicates with the electrochemical energy storage device to obtain the working mode, and generates a cloud electric energy dispatching strategy based on the working mode and the cloud dispatching rule and sends it to the electrochemical energy storage device; step S60, the electrochemical energy storage device uses the cloud electric energy dispatching strategy to control the charging and discharging of the battery. The advantages of the present invention are: not only does it simplify the difficulty of local dispatching, but it also greatly improves the timeliness of electric energy dispatching of the electrochemical energy storage device.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage scheduling, and in particular to an electric energy scheduling method. Background Art

[0002] Energy storage is a key technology for achieving carbon peak and carbon neutrality, and is also an important support for ensuring energy security. Electrochemical energy storage devices use batteries to dispatch power loads to smooth out the power load differences of various power loads, reduce the peak-to-valley difference of the power grid (power consumption at different times), and perform peak and frequency regulation of electricity, effectively solving the problem of wind and solar power abandonment (the problem of excessive power generation from wind power and photovoltaic power generation that the power grid cannot absorb).

[0003] Electrochemical energy storage devices have different specific compositions in different application fields, and there are many factors that affect the scheduling strategy of electrochemical energy storage devices, which makes the overall scheduling strategy quite complicated. If the electrochemical energy storage device performs edge computing to determine the scheduling strategy, it will take a long time to calculate the specific scheduling strategy due to the limited computing power of the electrochemical energy storage device, which will affect the scheduling effect of electric energy; if the cloud dispatches the electric energy of the electrochemical energy storage device, the response time of the electric energy scheduling will be longer.

[0004] Therefore, how to provide an electric energy dispatching method to improve the timeliness of electric energy dispatching of electrochemical energy storage devices has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an electric energy dispatching method to improve the timeliness of electric energy dispatching of an electrochemical energy storage device.

[0006] The present invention is implemented as follows: a method for dispatching electric energy, comprising the following steps:

[0007] Step S10, the electrochemical energy storage device creates a local charging scheduling strategy and a local discharging scheduling strategy;

[0008] Step S20, the electrochemical energy storage device obtains the grid access status, the current time period and the power generation source access status, and controls the charging and discharging of the battery based on the grid access status, the current time period, the power generation source access status, the local charging scheduling strategy and the local discharging scheduling strategy;

[0009] Step S30, the electrochemical energy storage device detects the current working mode in real time;

[0010] Step S40: The cloud creates a cloud scheduling rule;

[0011] Step S50: The cloud communicates with the electrochemical energy storage device in real time to obtain the working mode, and generates a cloud power dispatching strategy based on the working mode and cloud dispatching rules and sends it to the electrochemical energy storage device;

[0012] Step S60: The electrochemical energy storage device uses the received cloud power scheduling strategy to control the battery to charge or discharge.

[0013] Furthermore, in step S10, the local charging scheduling strategy is specifically:

[0014] When the electrochemical energy storage device is connected to the power grid, the AC side power source or the DC side power source, the start charging SOC threshold, stop charging SOC threshold and maximum charging current corresponding to the peak section, valley section and flat section are set;

[0015] When the electrochemical energy storage device is connected to the grid but not connected to the AC side power generation source and the DC side power generation source, the start charging SOC threshold, stop charging SOC threshold, and maximum charging current corresponding to the peak section, valley section, and flat section are set;

[0016] When the electrochemical energy storage device is not connected to the grid but is connected to the AC side power generation source or the DC side power generation source, the start charging SOC threshold, stop charging SOC threshold, and maximum charging current corresponding to the peak section, valley section, and flat section are set.

[0017] Furthermore, in step S10, the local discharge scheduling strategy is specifically:

[0018] When the electrochemical energy storage device is connected to the power grid, the AC side power source or the DC side power source, the start discharge SOC threshold, stop discharge SOC threshold and maximum discharge current corresponding to the peak section, valley section and flat section are set;

[0019] When the electrochemical energy storage device is connected to the grid but not connected to the AC side power generation source and the DC side power generation source, the start discharge SOC threshold, stop discharge SOC threshold, and maximum discharge current corresponding to the peak section, valley section, and flat section are set.

[0020] Furthermore, in step S20, the grid access status is grid-connected or off-grid, grid-connected means that the electrochemical energy storage device is connected to the grid, and off-grid means that the electrochemical energy storage device is not connected to the grid;

[0021] The current time period is a peak period, a valley period or a flat period;

[0022] The power generation source access status is a power generation source or no power generation source; a power generation source means that an AC side power generation source or a DC side power generation source is connected; no power generation source means that the AC side power generation source and the DC side power generation source are not connected, or the AC side power generation source and the DC side power generation source are not in a power generation state.

[0023] Further, in step S30, the working mode is a static mode, a charging mode or a discharging mode; each of the working modes includes two situations: the battery is connected to the bus through a DCDC power module and the battery is directly connected to the bus.

[0024] Further, in the step S40, the cloud scheduling rule includes a DCDC power module scheduling sub-rule and a non-DCDC power module scheduling sub-rule.

[0025] Further, in step S40, the DCDC power module scheduling sub-rule is specifically:

[0026] When the battery is connected to the bus through the DCDC power module, a bus voltage is preset:

[0027] When the working mode is static mode, the output voltage of the DC side power source = bus voltage + first voltage superposition value; the PCS output voltage is the bus voltage; when the bidirectional DCDC power module is charging, it outputs corresponding power to the load; when the bidirectional DCDC power module is discharging, the output voltage of the bidirectional DCDC power module = bus voltage + second voltage superposition value; the second voltage superposition value> first voltage superposition value; the AC side power source updates the output power according to the real-time load;

[0028] When the working mode is charging mode, the output voltage of the DC side power source = bus voltage + first voltage superposition value; the PCS output voltage is the bus voltage; the DCDC power module is charged according to the actual charging current; when the bidirectional DCDC power module is charging, it outputs corresponding power to the load; when the bidirectional DCDC power module is discharging, the output voltage of the bidirectional DCDC power module = bus voltage + second voltage superposition value; the AC side power source updates the output power according to the real-time load;

[0029] When the working mode is the discharge mode, the output voltage of the DC side power source = bus voltage + the first voltage superposition value; the PCS output voltage is the bus voltage; the DCDC power module output voltage = bus voltage + the third voltage superposition value, and is in a bidirectional working mode; when the bidirectional DCDC power module outputs energy to the outside, it outputs corresponding power to the load; when the bidirectional DCDC power module absorbs energy from the outside, the output voltage of the bidirectional DCDC power module = bus voltage + the second voltage superposition value; the third voltage superposition value < the first voltage superposition value; when the AC side power source is connected, the output current is updated according to the real-time load; when the AC side power source is not connected, the PCS is turned off.

[0030] Furthermore, in step S40, the scheduling sub-rule without DCDC power module is specifically:

[0031] When the battery is directly connected to the busbar, in each working mode, the load power and expected power of each load are first collected, and the generated power and ungenerated power of the AC side power source and the DC side power source are collected;

[0032] Based on the power generation costs of the AC side power source and the DC side power source, low-cost power sources are used for power output first, and then batteries are used for power output. The load power is updated in real time during the power output process.

[0033] Furthermore, the step S60 is specifically as follows:

[0034] The electrochemical energy storage device utilizes the received cloud power scheduling strategy to replace the local charging scheduling strategy or the local discharging scheduling strategy, thereby controlling the battery to charge or discharge.

[0035] Furthermore, the step S60 further includes:

[0036] The electrochemical energy storage device receives a cloud scheduling strategy obtained by cloud computing based on big data of the electrochemical energy storage device operation data, power grid data, weather forecast data, and charging and discharging history data, and controls the battery to charge or discharge based on the cloud scheduling strategy.

[0037] The advantages of the present invention are:

[0038] By creating a local charging scheduling strategy and a local discharging scheduling strategy locally in the electrochemical energy storage device and creating a cloud scheduling rule in the cloud, the electrochemical energy storage device first controls the charging and discharging of the battery based on the local charging scheduling strategy and the local discharging scheduling strategy, and detects the current working mode in real time and sends it to the cloud. The cloud uses powerful computing power to generate a cloud power scheduling strategy based on the working mode and cloud scheduling rules and sends it to the electrochemical energy storage device. The electrochemical energy storage device then uses the received cloud power scheduling strategy to control the battery to charge or discharge. That is, the electrochemical energy storage device first schedules the electric energy through the local charging scheduling strategy and the local discharging scheduling strategy to avoid the delay caused by requesting the scheduling strategy from the cloud. The cloud then uses powerful computing power to match the corresponding cloud power scheduling strategy based on the working mode of the electrochemical energy storage device to avoid the electrochemical energy storage device spending a long time on calculation. Ultimately, it not only simplifies the difficulty of local scheduling, but also greatly improves the timeliness of power scheduling of the electrochemical energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0040] Figure 1 It is a flow chart of an electric energy dispatching method of the present invention.

[0041] Figure 2It is a topological diagram of the electrochemical energy storage device of the present invention. DETAILED DESCRIPTION

[0042] The technical solution in the embodiments of the present application has the following overall idea: by creating a local charging scheduling strategy and a local discharging scheduling strategy in the electrochemical energy storage device and creating a cloud scheduling rule in the cloud, the electrochemical energy storage device first schedules the electric energy through the local charging scheduling strategy and the local discharging scheduling strategy to avoid the delay caused by requesting the scheduling strategy from the cloud, and the cloud then calculates the corresponding cloud electric energy scheduling strategy based on the working mode matching of the electrochemical energy storage device and sends it to the electrochemical energy storage device to avoid the electrochemical energy storage device taking a long time to calculate, so as to improve the timeliness of electric energy scheduling.

[0043] Please refer to Figure 1 to Figure 2 As shown, the present invention needs to use the following electrochemical energy storage device, including several PCSs, several AC side power sources, several DC side power sources, several batteries, several DCDC power modules, and several bidirectional DCDC power modules;

[0044] The input end of the PCS is connected to the AC bus, and the output end is connected to the DC bus; the AC side power source is connected to the AC bus; the DC side power source and the bidirectional DCDC power module are connected to the DC bus; the battery is directly connected to the DC bus, or is connected to the DC bus through the DCDC power module.

[0045] A preferred embodiment of an electric energy dispatching method of the present invention comprises the following steps:

[0046] Step S10, the electrochemical energy storage device creates a local charging scheduling strategy and a local discharging scheduling strategy;

[0047] Step S20, the electrochemical energy storage device obtains the grid access status, the current time period and the power generation source access status, and controls the charging and discharging of the battery based on the grid access status, the current time period, the power generation source access status, the local charging scheduling strategy and the local discharging scheduling strategy;

[0048] Step S30, the electrochemical energy storage device detects the current working mode in real time;

[0049] Step S40: The cloud creates a cloud scheduling rule;

[0050] Step S50: The cloud communicates with the electrochemical energy storage device in real time to obtain the working mode, and generates a cloud power dispatching strategy based on the working mode and cloud dispatching rules and sends it to the electrochemical energy storage device;

[0051] Step S60: The electrochemical energy storage device uses the received cloud power scheduling strategy to control the battery to charge or discharge.

[0052] In step S10, the local charging scheduling strategy is specifically:

[0053] When the electrochemical energy storage device is connected to the power grid, the AC side power source or the DC side power source, the start charging SOC threshold, stop charging SOC threshold and maximum charging current corresponding to the peak section, valley section and flat section are set;

[0054] When the electrochemical energy storage device is connected to the grid but not connected to the AC side power generation source and the DC side power generation source, the start charging SOC threshold, stop charging SOC threshold, and maximum charging current corresponding to the peak section, valley section, and flat section are set;

[0055] When the electrochemical energy storage device is not connected to the grid but is connected to the AC side power generation source or the DC side power generation source, the start charging SOC threshold, stop charging SOC threshold, and maximum charging current corresponding to the peak section, valley section, and flat section are set.

[0056] When the electrochemical energy storage device is connected to the power grid, connected to the AC side power source or the DC side power source (grid-connected with a power source), if the current battery SOC is between the starting SOC thresholds with and without a power source, the battery is charged according to the actual excess current of the electrochemical energy storage device. For example, if the AC side power source generates 100KW and the DC side power source generates 50KW, the total power generation is 150KW, and the current load is 120KW, then the battery is charged with 30KW of power.

[0057] The schematic table of the local charging scheduling strategy is as follows:

[0058]

[0059]

[0060] In step S10, the local discharge scheduling strategy is specifically:

[0061] When the electrochemical energy storage device is connected to the power grid, the AC side power source or the DC side power source, the start discharge SOC threshold, stop discharge SOC threshold and maximum discharge current corresponding to the peak section, valley section and flat section are set;

[0062] When the electrochemical energy storage device is connected to the grid but not connected to the AC side power generation source and the DC side power generation source, the start discharge SOC threshold, stop discharge SOC threshold, and maximum discharge current corresponding to the peak section, valley section, and flat section are set.

[0063] The start charging SOC threshold is less than the stop charging SOC threshold, and the start discharging SOC threshold is greater than the stop discharging SOC threshold. When the electrochemical energy storage device switches the working mode, it may be determined that both charging and discharging are required, and charging is given priority.

[0064] The schematic table of the local discharge scheduling strategy is as follows:

[0065]

[0066] In step S20, the grid access state is grid-connected or off-grid, grid-connected means that the electrochemical energy storage device is connected to the grid, and off-grid means that the electrochemical energy storage device is not connected to the grid;

[0067] The current time period is a peak period, a valley period or a flat period;

[0068] The power generation source access status is a power generation source or no power generation source; a power generation source means that an AC side power generation source or a DC side power generation source is connected; no power generation source means that the AC side power generation source and the DC side power generation source are not connected, or the AC side power generation source and the DC side power generation source are not in a power generation state.

[0069] In step S30, the working mode is a static mode, a charging mode or a discharging mode; each of the working modes includes two situations: the battery is connected to the bus through a DCDC power module and the battery is directly connected to the bus. The static mode means that the battery is neither charged nor discharged, and the power is output by the PCS.

[0070] In the step S40, the cloud scheduling rule includes a DCDC power module scheduling sub-rule and a non-DCDC power module scheduling sub-rule.

[0071] In step S40, the DCDC power module scheduling sub-rule is specifically:

[0072] When the battery is connected to the DC bus through the DCDC power module, a bus voltage is preset, and the value of the bus voltage is 800V for example:

[0073] When the working mode is static mode, the output voltage of the DC side power source = bus voltage + first voltage superposition value. For example, if the first voltage superposition value is set to 5V, the output voltage of the DC side power source is 805V. By adding the first voltage superposition value, the energy of the DC side power source can be maximized; the unidirectional output voltage of the PCS is the bus voltage; when the bidirectional DCDC power module is charging, it outputs corresponding power to the load; when the bidirectional DCDC power module is discharging, the output voltage of the bidirectional DCDC power module = bus voltage + second voltage superposition value; the second voltage superposition value > the first voltage superposition value. For example, if the second voltage superposition value is set to 6V, the output voltage of the bidirectional DCDC power module is 806V. The second voltage superposition value is set to be greater than the first voltage superposition value to avoid failure to discharge when the load is light; the AC side power source updates the output power according to the real-time load;

[0074] When the working mode is charging mode, the output voltage of the DC side power source = bus voltage + first voltage superposition value; the unidirectional output voltage of the PCS is the bus voltage; the DCDC power module is charged according to the actual charging current; when the bidirectional DCDC power module is charging, it outputs the corresponding power to the load; when the bidirectional DCDC power module is discharging, the output voltage of the bidirectional DCDC power module = bus voltage + second voltage superposition value; the AC side power source updates the output power according to the real-time load;

[0075] When the working mode is the discharge mode, the output voltage of the DC side power source = bus voltage + the first voltage superposition value; the unidirectional output voltage of the PCS is the bus voltage; the output voltage of the DCDC power module = bus voltage + the third voltage superposition value, and is in a bidirectional working mode; when the bidirectional DCDC power module outputs energy to the outside, it outputs corresponding power to the load; when the bidirectional DCDC power module absorbs energy from the outside, the output voltage of the bidirectional DCDC power module = bus voltage + the second voltage superposition value; the third voltage superposition value is less than the first voltage superposition value, for example, the third voltage superposition value is set to 3V in order to give priority to the power outside the battery; when the AC side power source is connected, the output current is updated according to the real-time load; when the AC side power source is not connected, the PCS is turned off.

[0076] The PCS, AC side power source, DC side power source and battery adopt a constant voltage and current limiting output mode.

[0077] In step S40, the scheduling sub-rule without DCDC power module is specifically:

[0078] When the battery is directly connected to the DC bus, in each working mode, the load power and expected power of each load are first collected, including the expected charging power of the battery. When the battery is overfull, the expected charging power of the battery can be a negative value. The generated power and ungenerated power of the AC side power source and the DC side power source are collected; the battery voltage is taken as 600-800V for example;

[0079] Based on the power generation costs of the AC side power source and the DC side power source, low-cost power sources are used for power output first, and then batteries are used for power output. The load power is updated in real time during the power output process. All conversion surges are borne by the battery, and the battery is always in a state of charge and discharge. During the charge and discharge process, the charge and discharge power is increased first, and then the power output is increased to improve safety and stability.

[0080] When off-grid, if there is only one PCS on the AC side, it is equivalent to one less PCS as a power source; when there is an AC side power source in the front stage, the PCS is equivalent to reducing power usage; when there is an AC load in the front stage, the PCS is equivalent to the power load.

[0081] The step S60 is specifically as follows:

[0082] The electrochemical energy storage device utilizes the received cloud power scheduling strategy to replace the local charging scheduling strategy or the local discharging scheduling strategy, thereby controlling the battery to charge or discharge.

[0083] The step S60 further includes:

[0084] The electrochemical energy storage device receives a cloud scheduling strategy obtained by cloud computing based on big data of the electrochemical energy storage device operation data, power grid data, weather forecast data, and charging and discharging history data, and controls the battery to charge or discharge based on the cloud scheduling strategy.

[0085] In summary, the advantages of the present invention are:

[0086] By creating a local charging scheduling strategy and a local discharging scheduling strategy locally in the electrochemical energy storage device and creating a cloud scheduling rule in the cloud, the electrochemical energy storage device first controls the charging and discharging of the battery based on the local charging scheduling strategy and the local discharging scheduling strategy, and detects the current working mode in real time and sends it to the cloud. The cloud uses powerful computing power to generate a cloud power scheduling strategy based on the working mode and cloud scheduling rules and sends it to the electrochemical energy storage device. The electrochemical energy storage device then uses the received cloud power scheduling strategy to control the battery to charge or discharge. That is, the electrochemical energy storage device first schedules the electric energy through the local charging scheduling strategy and the local discharging scheduling strategy to avoid the delay caused by requesting the scheduling strategy from the cloud. The cloud then uses powerful computing power to match the corresponding cloud power scheduling strategy based on the working mode of the electrochemical energy storage device to avoid the electrochemical energy storage device spending a long time on calculation. Ultimately, it not only simplifies the difficulty of local scheduling, but also greatly improves the timeliness of power scheduling of the electrochemical energy storage device.

[0087] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A method for dispatching electric energy, characterized in that: The steps include: Step S10, the electrochemical energy storage device creates a local charging scheduling strategy and a local discharging scheduling strategy; Step S20, the electrochemical energy storage device obtains the grid access status, the current time period and the power generation source access status, and controls the charging and discharging of the battery based on the grid access status, the current time period, the power generation source access status, the local charging scheduling strategy and the local discharging scheduling strategy; Step S30, the electrochemical energy storage device detects the current working mode in real time; the working mode is a static mode, a charging mode or a discharging mode; each of the working modes includes two situations: the battery is connected to the bus through a DCDC power module and the battery is directly connected to the bus; Step S40: The cloud creates a cloud scheduling rule; the cloud scheduling rule includes a scheduling sub-rule with a DCDC power module and a scheduling sub-rule without a DCDC power module; Step S50: The cloud communicates with the electrochemical energy storage device in real time to obtain the working mode, and generates a cloud power dispatching strategy based on the working mode and cloud dispatching rules and sends it to the electrochemical energy storage device; Step S60: The electrochemical energy storage device controls the battery to charge or discharge using the received cloud power scheduling strategy; In step S10, the local charging scheduling strategy is specifically: When the electrochemical energy storage device is connected to the power grid, the AC side power source or the DC side power source, the start charging SOC threshold, stop charging SOC threshold and maximum charging current corresponding to the peak section, valley section and flat section are set; When the electrochemical energy storage device is connected to the grid but not connected to the AC side power generation source and the DC side power generation source, the start charging SOC threshold, stop charging SOC threshold, and maximum charging current corresponding to the peak section, valley section, and flat section are set; Set the start charging SOC threshold, stop charging SOC threshold, and maximum charging current corresponding to the peak section, valley section, and flat section when the electrochemical energy storage device is not connected to the grid but connected to the AC side power source or the DC side power source; The local discharge scheduling strategy is specifically: When the electrochemical energy storage device is connected to the power grid, the AC side power source or the DC side power source, the start discharge SOC threshold, stop discharge SOC threshold and maximum discharge current corresponding to the peak section, valley section and flat section are set; When the electrochemical energy storage device is connected to the grid but not connected to the AC side power generation source and the DC side power generation source, the start discharge SOC threshold, stop discharge SOC threshold, and maximum discharge current corresponding to the peak section, valley section, and flat section are set.

2. The electric energy dispatching method according to claim 1, characterized in that: In step S20, the grid access state is grid-connected or off-grid, grid-connected means that the electrochemical energy storage device is connected to the grid, and off-grid means that the electrochemical energy storage device is not connected to the grid; The current time period is a peak period, a valley period or a flat period; The power generation source access status is a power generation source or no power generation source; a power generation source means that an AC side power generation source or a DC side power generation source is connected; no power generation source means that the AC side power generation source and the DC side power generation source are not connected, or the AC side power generation source and the DC side power generation source are not in a power generation state.

3. The electric energy dispatching method according to claim 1, characterized in that: In step S40, the DCDC power module scheduling sub-rule is specifically: When the battery is connected to the bus through the DCDC power module, a bus voltage is preset: When the working mode is static mode, the output voltage of the DC side power source = bus voltage + first voltage superposition value; the PCS output voltage is the bus voltage; when the bidirectional DCDC power module is charging, it outputs corresponding power to the load; when the bidirectional DCDC power module is discharging, the output voltage of the bidirectional DCDC power module = bus voltage + second voltage superposition value; the second voltage superposition value> first voltage superposition value; the AC side power source updates the output power according to the real-time load; When the working mode is charging mode, the output voltage of the DC side power source = bus voltage + first voltage superposition value; the PCS output voltage is the bus voltage; the DCDC power module is charged according to the actual charging current; when the bidirectional DCDC power module is charging, it outputs corresponding power to the load; when the bidirectional DCDC power module is discharging, the output voltage of the bidirectional DCDC power module = bus voltage + second voltage superposition value; the AC side power source updates the output power according to the real-time load; When the working mode is the discharge mode, the output voltage of the DC side power source = bus voltage + the first voltage superposition value; the PCS output voltage is the bus voltage; the DCDC power module output voltage = bus voltage + the third voltage superposition value, and is in a bidirectional working mode; when the bidirectional DCDC power module outputs energy to the outside, it outputs corresponding power to the load; when the bidirectional DCDC power module absorbs energy from the outside, the output voltage of the bidirectional DCDC power module = bus voltage + the second voltage superposition value; the third voltage superposition value < the first voltage superposition value; when the AC side power source is connected, the output current is updated according to the real-time load; when the AC side power source is not connected, the PCS is turned off.

4. The electric energy dispatching method according to claim 1, characterized in that: In step S40, the scheduling sub-rule without DCDC power module is specifically: When the battery is directly connected to the busbar, in each working mode, the load power and expected power of each load are first collected, and the generated power and ungenerated power of the AC side power source and the DC side power source are collected; Based on the power generation costs of the AC side power source and the DC side power source, low-cost power sources are used for power output first, and then batteries are used for power output. The load power is updated in real time during the power output process.

5. The electric energy dispatching method according to claim 1, characterized in that: The step S60 is specifically as follows: The electrochemical energy storage device utilizes the received cloud power scheduling strategy to replace the local charging scheduling strategy or the local discharging scheduling strategy, thereby controlling the battery to charge or discharge.

6. The electric energy dispatching method according to claim 1, characterized in that: The step S60 further includes: The electrochemical energy storage device receives a cloud scheduling strategy obtained by cloud computing based on big data of the electrochemical energy storage device operation data, power grid data, weather forecast data, and charging and discharging history data, and controls the battery to charge or discharge based on the cloud scheduling strategy.

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