WO2022142452A1 - 并离网调度方法、装置及储能供电系统 - Google Patents
并离网调度方法、装置及储能供电系统 Download PDFInfo
- Publication number
- WO2022142452A1 WO2022142452A1 PCT/CN2021/117139 CN2021117139W WO2022142452A1 WO 2022142452 A1 WO2022142452 A1 WO 2022142452A1 CN 2021117139 W CN2021117139 W CN 2021117139W WO 2022142452 A1 WO2022142452 A1 WO 2022142452A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- energy storage
- grid
- storage device
- load
- control
- Prior art date
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 226
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000007423 decrease Effects 0.000 claims abstract description 38
- 230000008859 change Effects 0.000 claims abstract description 17
- 230000009467 reduction Effects 0.000 claims description 16
- 230000004913 activation Effects 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000010248 power generation Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
Definitions
- the present disclosure relates to an on-grid and off-grid scheduling method, device and energy storage power supply system.
- the energy storage equipment in the energy storage power supply system can operate in the grid-connected state and the off-grid state.
- the energy storage device works in the grid-connected state; when the energy storage system is off-grid, the energy storage device works in the off-grid state.
- An embodiment of the present disclosure provides a method for on-grid and off-grid scheduling, and the method is applied to an energy storage power supply system, where the energy storage power supply system includes an energy storage device, the energy storage device is connected to a DC bus, and the DC bus is One end is connected to the power grid through the AC-DC module, and the other end is connected to the load, and the method includes:
- the output voltage of the energy storage device is controlled to decrease once every first preset time interval
- the variation of the input voltage of the load is obtained, and whether to control the energy storage device to switch to the grid-connected operation mode is determined according to the variation of the input voltage of the load.
- determining whether to control the energy storage device to switch to a grid-connected operation mode according to a change in the input voltage of the load includes:
- the method before controlling the output voltage of the energy storage device to decrease once every first preset time period, the method further includes:
- the first preset duration is determined according to the activation duration; wherein, the first preset duration is greater than the activation duration.
- the method before the energy storage device enters the off-grid operating mode, the method further includes:
- the target voltage is the input voltage of the load before the energy storage device is connected to the DC bus
- the energy storage device is controlled to enter an off-grid operation mode.
- the method further includes:
- the target current is the current of the load before the energy storage device is connected to the DC bus. Input Current
- the output current of the energy storage device is controlled to increase to the target current.
- the method further includes:
- An embodiment of the present disclosure also provides an on-grid and off-grid scheduling device, which is applied to the above-mentioned on-grid and off-grid scheduling method, and the device includes:
- the step-down module is used to control the output voltage of the energy storage device to decrease once every first preset time interval after the energy storage device enters the off-grid operation mode;
- a first control module configured to acquire the change of the input voltage of the load after each time the output voltage of the energy storage device is controlled to decrease, and determine whether to control the energy storage device according to the change of the input voltage of the load Switch to grid-connected operation.
- the first control module includes:
- a first control unit configured to determine and control the energy storage device to switch to a grid-connected operation mode when the input voltage of the load does not decrease
- the second control unit is configured to determine and control the energy storage device to maintain the off-grid operation mode when the input voltage of the load is reduced, and control the output voltage of the energy storage device to return to the value before the reduction.
- the apparatus further includes:
- a setting module configured to acquire the startup duration of the AC-DC module; determine the first preset duration according to the startup duration; wherein, the first preset duration is greater than the startup duration.
- the apparatus further includes a second control module including:
- a voltage obtaining unit configured to obtain the input voltage of the load once every second preset time period before the energy storage device enters the off-grid operation mode
- a judgment unit configured to judge whether the deviation between the input voltage of the load and the target voltage is greater than a preset threshold; wherein, the target voltage is the input voltage of the load before the energy storage device is connected to the DC bus;
- a third control unit configured to control the energy storage device to enter an off-grid operation mode when the deviation between the input voltage of the load and the target voltage is greater than a preset threshold.
- the apparatus further includes a third control module, the third control module includes:
- a current acquisition unit configured to acquire the input current of the load after controlling the energy storage device to switch to the grid-connected operation mode
- a fourth control unit configured to determine whether the energy storage device is in a low-battery protection state when the input current of the load is greater than zero and less than a target current; wherein the target current is the connection of the energy storage device Before entering the DC bus, the input current of the load; if yes, control the output current of the energy storage device to zero, and switch to the grid-connected standby state; if not, control the output current of the energy storage device to increase up to the target current.
- the third control module further includes:
- a fifth control unit configured to judge whether the energy storage device is in a fully charged state if the input current of the load is equal to zero; if not, control the energy storage device to be connected to the grid for charging; if so, control the energy storage device The energy storage device is switched to the grid-connected standby state.
- Embodiments of the present disclosure also provide an on-grid and off-grid scheduling device, including:
- a processor coupled to the memory is configured to execute the on-grid and off-grid scheduling method in any one of the above embodiments based on the instructions stored in the memory.
- Embodiments of the present disclosure further provide an energy storage power supply system, which includes an energy storage device, an AC-DC module, and a load, and also includes the above-mentioned on-grid and off-grid scheduling device.
- the on-grid and off-grid scheduling device is located in the energy storage device.
- Embodiments of the present disclosure also provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned on-grid and off-grid scheduling method is implemented.
- FIG. 1 is a structural diagram of an energy storage power supply system according to some embodiments of the present disclosure
- FIG. 2 is a flowchart of an on-grid and off-grid scheduling method according to some embodiments of the present disclosure
- FIG. 3 is a structural diagram of an on-grid and off-grid scheduling apparatus according to some embodiments of the present disclosure
- FIG. 4 is a structural diagram of an on-grid and off-grid scheduling apparatus according to other embodiments of the present disclosure.
- first, second, etc. may be used to describe the preset durations in the embodiments of the present disclosure, these preset durations should not be limited to these terms. These terms are only used to distinguish between different preset durations.
- the first preset duration may also be referred to as the second preset duration, and similarly, the second preset duration may also be referred to as the first preset duration.
- the words “if”, “if” as used herein may be interpreted as “at” or “when” or “in response to determining” or “in response to detecting”.
- the phrases “if determined” or “if detected (the stated condition or event)” can be interpreted as “when determined” or “in response to determining” or “when detected (the stated condition or event),” depending on the context )” or “in response to detection (a stated condition or event)”.
- the energy storage device uses the method of voltage difference between on-grid and off-grid to distinguish the on-grid and off-grid state of the energy storage power supply system, that is, the energy storage device distinguishes the on-grid and off-grid state of the system by identifying the real-time change of the bus voltage. . For example, when the busbar voltage is a certain preset voltage, it is determined that the energy storage power supply system is in a grid-connected state; when the busbar voltage is another preset voltage, it is determined that the energy storage power supply system is in an off-grid state.
- the embodiments of the present disclosure provide an on-grid and off-grid scheduling method, which is applied to an energy storage power supply system.
- 1 is a structural diagram of an energy storage power supply system according to some embodiments of the present disclosure.
- the energy storage power supply system includes: an energy storage device, and the energy storage device includes a battery, a battery management system (BMS), and a DC -DC module, the DC-DC module is connected to the DC bus, one end of the DC bus is connected to the power grid through the AC-DC module, and the other end is connected to the load, which is a DC electrical appliance.
- BMS battery management system
- the energy storage power supply system further includes photovoltaic power generation equipment (PV equipment), wherein the photovoltaic power generation equipment is connected to the AC-DC module to provide clean energy.
- PV equipment photovoltaic power generation equipment
- the AC-DC module has a grid interface and a photovoltaic interface, which can be connected to the AC grid and photovoltaic power generation equipment at the same time.
- FIG. 2 is a flow chart of a method for on-grid and off-grid scheduling according to some embodiments of the present disclosure. As shown in FIG. 2 , the method includes step S101 and step S102 .
- the output voltage of the energy storage device is controlled to decrease once every first preset time period.
- the reduction range can be set in advance. By controlling the reduction range, after the output voltage of the energy storage device is reduced, the input voltage of the load is not lower than the minimum working voltage of the load, such as 95% of the target voltage.
- the power supply source of the load is the energy storage device. In this case, when the output voltage of the energy storage device decreases, the input voltage of the load also decreases.
- the energy storage power supply system is connected to the grid (the power grid has not stopped supplying power), the power grid and the energy storage device will jointly supply power. In this case, the input voltage of the load will not fluctuate greatly. Therefore, it can be determined whether the power grid stops supplying power through the change of the input voltage of the load, and then whether to control the energy storage device to switch to the grid-connected operation mode.
- the output voltage of the energy storage device is controlled to decrease once every first preset time interval; After the reduction, the change of the input voltage of the load is obtained, and according to the change of the input voltage of the load, it is determined whether to control the energy storage device to switch to the grid-connected operation mode. In this way, the on-grid and off-grid status of the energy storage equipment can be accurately controlled to ensure the reliable operation of the load.
- the embodiments of the present disclosure provide another on-grid scheduling method.
- the above step S102 specifically includes: if the input voltage of the load does not decrease, determining to control the energy storage device to switch to the grid-connected operation mode; if the input voltage of the load decreases, determining to control the energy storage device to keep the distance from the grid.
- the grid operation mode is controlled, and the output voltage of the energy storage device is controlled to return to the value before the reduction.
- the AC-DC module needs to go through the startup time before its output can be stabilized. If the first preset time is too short, the system will switch from the off-grid state to the grid-connected state during the interval between two voltage reductions, but the output is not stable. state, then when the input voltage change of the load is detected for the second time, it is still possible to detect that the input voltage of the load decreases, causing the energy storage device to maintain the off-grid operation mode, but at this time the system has actually switched to the grid-connected state, that is, the energy storage device The device cannot accurately switch and off-grid state.
- the method before the output voltage of the energy storage device is controlled to decrease once every first preset time interval, the method further includes: acquiring the startup duration of the AC-DC module; determining according to the startup duration the first preset duration; wherein, the first preset duration is greater than the above-mentioned startup duration, so as to ensure that the AC-DC module is fully activated within the interval between two depressurizations, so as to ensure that the energy storage device can be accurately switched and disconnected from the grid state.
- the method further includes: obtaining the input voltage of the load once every second preset time period; judging whether the deviation between the input voltage of the load and the target voltage is greater than a preset threshold; wherein, the target voltage is The input voltage of the load before the energy storage device is connected to the DC bus; if it is, the energy storage device is controlled to enter the off-grid operation mode.
- the input voltage of the load will drop significantly.
- the input voltage of the load may also fluctuate slightly.
- the input voltage of the load In order to eliminate the influence of fluctuations, it is necessary to determine the input voltage of the load and the target voltage. Whether the deviation is greater than a preset threshold, such as 5% of the target voltage, if so, it can be determined that the input voltage of the load has decreased significantly due to the system off-grid.
- a preset threshold such as 5% of the target voltage
- the above-mentioned second preset duration may be equal to or not equal to the first preset duration.
- the above method further includes: obtaining the input current of the load; if the input current of the load is greater than zero and less than the target current, judging Whether the energy storage device is in a low-battery protection state; among them, the target current is the input current of the load before the energy storage device is connected to the DC bus; if it is, it indicates that the energy storage device has a low battery, and the output current of the control energy storage device is 0, and switch to grid-connected standby state; if not, it indicates that the power of the energy storage device is sufficient, and the output current of the energy storage device is controlled to increase to the target current.
- the energy storage device can be charged at this time. First, determine whether the energy storage device is in a fully charged state; if not, control the energy storage device to connect to the grid for charging; if so, then Control the energy storage device to switch to the grid-connected standby state.
- FIG. 3 is a structural diagram of an on-grid and off-grid scheduling apparatus according to some embodiments of the present disclosure.
- the apparatus includes: : the step-down module 10, configured to control the output voltage of the energy storage device to decrease once every first preset time interval after the energy storage device enters the off-grid operation mode.
- the reduction range can be set in advance. By controlling the reduction range, after the output voltage of the energy storage device is reduced, the input voltage of the load is not lower than the minimum working voltage of the load, such as 95% of the target voltage.
- the device further includes a first control module 20, configured to acquire the change of the input voltage of the load after each time the output voltage of the controlled energy storage device is reduced, and to determine whether to control the energy storage device to switch to parallel according to the change of the input voltage of the load. network operating mode.
- the power supply of the load is the energy storage device.
- the output voltage of the energy storage device decreases, the input voltage of the load will also decrease. If it is in the grid-connected state, the power supply will be jointly supplied by the grid and the energy storage device. Therefore, the input voltage of the load will not fluctuate greatly. Therefore, it can be determined whether the power grid stops supplying power through the change of the input voltage of the load, and then whether to control the energy storage device to switch to the grid-connected operation mode.
- the functions of the step-down module 10 and the first control module 20 may be integrated inside the energy storage device. Voltage detection, and on-grid mode switching control.
- the output voltage of the energy storage device is controlled to be reduced once every first preset time period through the step-down module 10; 20 After each control the output voltage of the energy storage device is reduced, obtain the input voltage variation of the load, and determine whether to control the energy storage device to switch to the grid-connected operation mode according to the input voltage variation of the load. It can accurately control the on-grid and off-grid status of the energy storage equipment to ensure the reliable operation of the load.
- the method of using communication for on-grid and off-grid detection that is, the front-end grid-connected device (such as an AC-DC module) sends the on-grid and off-grid command to the energy storage device to inform the energy storage device of the current state of the energy storage power supply system. operating status.
- the front-end grid-connected device such as an AC-DC module
- the on-grid and off-grid scheduling apparatus of some embodiments of the present disclosure is located in the energy storage device, which avoids the problem of unreliability caused by communication interference.
- Embodiments of the present disclosure provide another on-grid and off-grid scheduling device.
- FIG. 4 is a structural diagram of a on-grid and off-grid scheduling device according to other embodiments of the present disclosure.
- the above-mentioned first control module 20 includes:
- the first control unit 201 is configured to determine and control the energy storage device to switch to the grid-connected operation mode when the input voltage of the load does not decrease; the second control unit 202 is configured to determine the control unit 202 when the input voltage of the load decreases.
- the energy storage device is controlled to maintain the off-grid operation mode, and the output voltage of the energy storage device is controlled to return to the value before the reduction.
- the AC-DC module needs to go through the startup time before its output can be stabilized. If the first preset is too short, the system switches from the off-grid state to the grid-connected state during the interval between the two voltage reductions, but the output does not reach the In the stable state, when the input voltage change of the load is detected for the second time, it is still possible to detect that the input voltage of the load decreases, causing the energy storage device to maintain the off-grid operation mode, but at this time the system has actually switched to the grid-connected state, that is, the storage
- the above-mentioned device further includes a setting module 30: used to obtain the startup duration of the AC-DC module, and determine the first preset duration according to the startup duration; A preset duration is longer than the activation duration. In order to ensure that the AC-DC module is fully activated within the interval between two voltage reductions, it is ensured that the energy storage equipment cannot be accurately switched to the off-grid state.
- a second control module 40 which includes: a voltage obtaining unit 401, used for obtaining the input voltage of the load at every second preset time interval before the energy storage device enters the off-grid operation mode; the judging unit 402, using It is used to determine whether the deviation between the input voltage of the load and the target voltage is greater than a preset threshold; wherein, the target voltage is the input voltage of the load before the energy storage device is connected to the DC bus; the third control unit 403 is used for the input voltage of the load and the load.
- the energy storage device When the deviation of the target voltage is greater than the preset threshold, the energy storage device is controlled to enter the off-grid operation mode. After the system is disconnected from the grid, the input voltage of the load will drop significantly. When the system is connected to the grid, the input voltage of the load may also fluctuate slightly. In order to eliminate the influence of fluctuations, it is necessary to determine the input voltage of the load and the target voltage. Whether the deviation is greater than a preset threshold, such as 5% of the target voltage, if so, it can be determined that the input voltage of the load has decreased significantly due to the system off-grid.
- a preset threshold such as 5% of the target voltage
- the above device further includes: a third control module 50, which includes: a current acquisition unit 501 for acquiring the input of the load
- the fourth control unit 502 is used to judge whether the energy storage device is in a low-battery protection state when the input current of the load is greater than zero and less than the target current; wherein, the target current is the value of the load before the energy storage device is connected to the DC bus.
- Input current if yes, control the output current of the energy storage device to be zero, and switch to grid-connected standby state; if not, control the output current of the energy storage device to increase to the target current.
- the third control module 50 further includes a fifth control unit 503 for determining whether the energy storage device is in a fully charged state when the input current of the load is equal to zero; if not, controlling the energy storage device to be connected to the grid for charging ; If yes, control the energy storage device to switch to grid-connected standby state.
- An embodiment of the present disclosure provides another on-grid scheduling method, which is applied to an energy storage power supply system.
- the structure of the energy storage power supply system in the embodiment of the present disclosure is shown in FIG. 1 mentioned above, including an AC-DC module, a storage
- the load is a DC electrical appliance
- the energy storage device includes a battery, a BMS and a DC-DC module
- the energy storage device has a voltage detection interface and a current detection interface.
- the above-mentioned energy storage power supply system further includes photovoltaic power generation equipment, wherein the photovoltaic power generation equipment is connected to the AC-DC module to provide clean energy.
- the AC-DC module has a grid interface and a photovoltaic interface, which can be connected to the grid and photovoltaic power generation equipment at the same time.
- the on-grid and off-grid scheduling methods of other embodiments of the present disclosure specifically include steps S1 to S4.
- the DC-DC module monitors the input voltage of the load in real time.
- the input voltage of the load decreases to the lower limit of the load's working voltage (for example, 95% of the target voltage value U0)
- the energy storage The system judges that the system is converted from the grid-connected state to the off-grid state, and at the same time sets the on-grid and off-grid flag to 1, the energy storage system enters the off-grid working mode, and the DC-DC module adjusts the voltage output to stabilize the voltage at the target voltage value U0.
- the DC-DC module when the energy storage system runs off-grid, the DC-DC module outputs corresponding power according to the load power, and at the same time determines the first preset time according to the start-up time of the AC-DC module, wherein the first preset time is greater than the AC power - The boot time of the DC module. Every first preset time interval, the output voltage of the DC-DC module is reduced once, and the reduction range is set according to the lower limit value of the working voltage range of the DC electrical appliance, for example, 5% of the target voltage value U0 is reduced. At the same time, the DC-DC module detects the input voltage of the load.
- the DC-DC module monitors the input current I of the load in real time.
- the battery management system BMS detects whether it is in a low-battery protection state. If not, the energy storage The output current of the DC-DC module of the system is gradually increased from 0 to I; if so, the energy storage system is connected to the grid for standby.
- Embodiments of the present disclosure provide another on- and off-grid scheduling apparatus, including: a memory and a processor coupled to the memory.
- the processor is configured to execute the on-grid and off-grid scheduling method in any one of the above embodiments based on the instructions stored in the memory.
- An embodiment of the present disclosure provides an energy storage power supply system, including an energy storage device, an AC-DC module, and a load, and the energy storage device includes the on-grid and off-grid scheduling device in any one of the foregoing embodiments.
- the energy storage power supply system is used to accurately control the on-grid and off-grid status of the energy storage equipment to ensure the reliable operation of the load.
- An embodiment of the present disclosure provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the on-grid and off-grid scheduling method in any one of the foregoing embodiments.
- the device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solutions of the embodiments of the present disclosure.
- each embodiment can be implemented by means of software plus a necessary general hardware platform, and certainly can also be implemented by hardware.
- the above-mentioned technical solutions can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic A disc, an optical disc, etc., includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments or some parts of the embodiments.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims (16)
- 一种并离网调度方法,其特征在于,所述方法应用于储能供电系统,所述储能供电系统包括储能设备,所述储能设备连接至直流母线,所述直流母线的一端通过AC-DC模块连接电网,另一端连接负载,所述方法包括:在储能设备进入离网运行模式后,每间隔第一预设时长,控制储能设备的输出电压降低一次;在每次控制所述储能设备的输出电压降低后,获取所述负载的输入电压变化情况,并根据所述负载的输入电压变化情况确定是否控制所述储能设备切换至并网运行模式。
- 根据权利要求1所述的方法,其特征在于,根据所述负载的输入电压变化情况确定是否控制所述储能设备切换至并网运行模式,包括:如果所述负载的输入电压未降低,则确定控制所述储能设备切换至并网运行模式;如果所述负载的输入电压降低,则确定控制所述储能设备保持离网运行模式,并控制所述储能设备的输出电压恢复至降低之前的值。
- 根据权利要求1所述的方法,其特征在于,在每间隔第一预设时长,控制储能设备的输出电压降低一次之前,所述方法还包括:获取所述AC-DC模块的启动时长;根据所述启动时长确定所述第一预设时长;其中,所述第一预设时长大于所述启动时长。
- 根据权利要求1所述的方法,其特征在于,在储能设备进入离网运行模式之前,所述方法还包括:每间隔第二预设时长,获取一次所述负载的输入电压;判断所述负载的输入电压与目标电压的偏差是否大于预设阈值;其中,所述目标电压为所述储能设备接入直流母线之前,所述负载的输入电压;如果是,则控制所述储能设备进入离网运行模式。
- 根据权利要求1所述的方法,其特征在于,控制所述储能设备切换至并网运行模式后,所述方法还包括:获取所述负载的输入电流;如果所述负载的输入电流大于零且小于目标电流,则判断所述储能设备是否处于 低电量保护状态;其中,所述目标电流为所述储能设备接入直流母线之前,所述负载的输入电流;如果是,则控制所述储能设备的输出电流为零,并切换为并网待机状态;如果否,则控制所述储能设备的输出电流增大至所述目标电流。
- 根据权利要求5所述的方法,其特征在于,获取所述负载的输入电流之后,所述方法还包括:如果所述负载的输入电流等于零,则判断所述储能设备是否处于满电状态;如果否,则控制所述储能设备并网充电;如果是,则控制所述储能设备切换为并网待机状态。
- 一种并离网调度装置,其特征在于,应用于储能供电系统,所述储能供电系统的储能设备连接至直流母线,所述直流母线的一端通过AC-DC模块连接电网,另一端连接负载,所述装置包括:降压模块,用于在储能设备进入离网运行模式后,每间隔第一预设时长,控制储能设备的输出电压降低一次;第一控制模块,用于在每次控制所述储能设备的输出电压降低后,获取所述负载的输入电压变化情况,并根据所述负载的输入电压变化情况确定是否控制所述储能设备切换至并网运行模式。
- 根据权利要求7所述的装置,其特征在于,所述第一控制模块包括:第一控制单元,用于在所述负载的输入电压未降低的情况下,确定控制所述储能设备切换至并网运行模式;第二控制单元,用于在所述负载的输入电压降低的情况下,确定控制所述储能设备保持离网运行模式,并控制所述储能设备的输出电压恢复至降低之前的值。
- 根据权利要求7所述的装置,其特征在于,所述装置还包括:设定模块,用于获取所述AC-DC模块的启动时长;根据所述启动时长确定所述第一预设时长;其中,所述第一预设时长大于所述启动时长。
- 根据权利要求7所述的装置,其特征在于,所述装置还包括第二控制模块,所述第二控制模块包括:电压获取单元,用于在储能设备进入离网运行模式之前,每间隔第二预设时长,获取一次所述负载的输入电压;判断单元,用于判断所述负载的输入电压与目标电压的偏差是否大于预设阈值; 其中,所述目标电压为所述储能设备接入直流母线之前,所述负载的输入电压;第三控制单元,用于在所述负载的输入电压与目标电压的偏差大于预设阈值的情况下,控制所述储能设备进入离网运行模式。
- 根据权利要求7所述的装置,其特征在于,所述装置还包括第三控制模块,所述第三控制模块包括:电流获取单元,用于获取在控制所述储能设备切换至并网运行模式后的所述负载的输入电流;第四控制单元,用于在所述负载的输入电流大于零且小于目标电流的情况下,判断所述储能设备是否处于低电量保护状态;其中,所述目标电流为所述储能设备接入直流母线之前,所述负载的输入电流;如果是,则控制所述储能设备的输出电流为零,并切换为并网待机状态;如果否,则控制所述储能设备的输出电流增大至所述目标电流。
- 根据权利要求11所述的装置,其特征在于,所述第三控制模块还包括:第五控制单元,用于如果所述负载的输入电流等于零,则判断所述储能设备是否处于满电状态;如果否,则控制所述储能设备并网充电;如果是,则控制所述储能设备切换为并网待机状态。
- 一种并离网调度装置,包括:存储器;以及耦接至所述存储器的处理器,被配置为基于存储在所述存储器中的指令,执行权利要求1-6中任一项所述的方法。
- 一种储能供电系统,其特征在于,包括储能设备、AC-DC模块、负载和权利要求7-13中任一项所述的并离网调度装置。
- 根据权利要求14所述的系统,其特征在于,所述并离网调度装置位于所述储能设备中。
- 一种计算机可读存储介质,其上存储有计算机程序,其特征在于,所述程序被处理器执行时实现如权利要求1至6中任一项所述的方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21913199.2A EP4164080A4 (en) | 2020-12-31 | 2021-09-08 | METHOD AND DEVICE FOR PLANNING SWITCHING ON AND OFF OF A NETWORK AND ENERGY STORAGE POWER SUPPLY SYSTEM |
AU2021413483A AU2021413483A1 (en) | 2020-12-31 | 2021-09-08 | On-grid/off-grid scheduling method and apparatus, and energy-storage power supply system |
US18/016,152 US20230283082A1 (en) | 2020-12-31 | 2021-09-08 | On-Grid/Off-Grid Scheduling Method and Apparatus, and Energy Storage Power Supply System |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011640870.7 | 2020-12-31 | ||
CN202011640870.7A CN112821435B (zh) | 2020-12-31 | 2020-12-31 | 一种并离网调度方法、装置及储能供电系统 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022142452A1 true WO2022142452A1 (zh) | 2022-07-07 |
Family
ID=75856450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2021/117139 WO2022142452A1 (zh) | 2020-12-31 | 2021-09-08 | 并离网调度方法、装置及储能供电系统 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230283082A1 (zh) |
EP (1) | EP4164080A4 (zh) |
CN (1) | CN112821435B (zh) |
AU (1) | AU2021413483A1 (zh) |
WO (1) | WO2022142452A1 (zh) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112821435B (zh) * | 2020-12-31 | 2024-03-22 | 珠海格力电器股份有限公司 | 一种并离网调度方法、装置及储能供电系统 |
CN113746170B (zh) * | 2021-09-03 | 2024-02-09 | 阳光电源(上海)有限公司 | 一种储能系统及其离网过载保护方法 |
CN113922440A (zh) * | 2021-09-06 | 2022-01-11 | 珠海格力电器股份有限公司 | 一种储能系统控制方法、装置和储能系统及储能设备 |
CN113890101B (zh) * | 2021-10-29 | 2024-07-09 | 阳光电源(上海)有限公司 | 一种储能改造系统及其控制方法 |
CN114268133A (zh) * | 2021-12-06 | 2022-04-01 | 电子科技大学 | 适用于全控器件的电力电子储能系统供电网频率控制方法 |
US20240128751A1 (en) * | 2022-10-12 | 2024-04-18 | Enphase Energy, Inc. | Extended duration ac battery |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103023132A (zh) * | 2012-11-19 | 2013-04-03 | 中国电力科学研究院 | 一种采用储能变流器实现被动离网无缝切换控制方法 |
CN108521140A (zh) * | 2018-04-03 | 2018-09-11 | 深圳电丰电子有限公司 | 一种分布式光伏并离储能逆变系统 |
CN211063355U (zh) * | 2019-12-19 | 2020-07-21 | 上海煦达新能源科技有限公司 | 并离网快速切换控制的储能逆变器 |
CN112821435A (zh) * | 2020-12-31 | 2021-05-18 | 珠海格力电器股份有限公司 | 一种并离网调度方法、装置及储能供电系统 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102185333B (zh) * | 2011-04-19 | 2013-05-08 | 河南省电力公司电力科学研究院 | 双向变流器在微电网中实现并离网双模式运行的方法 |
CN103390900A (zh) * | 2013-07-22 | 2013-11-13 | 上海电力学院 | 一种分布式光伏储能系统及能量管理方法 |
CN104319815B (zh) * | 2014-11-14 | 2017-01-11 | 国家电网公司 | 一种微网变流器的并/离网无缝切换方法 |
CN104333042A (zh) * | 2014-11-17 | 2015-02-04 | 国网上海市电力公司 | 一种储能变流器并离网无缝切换控制装置及方法 |
CN106353614B (zh) * | 2016-08-29 | 2020-01-21 | 许继集团有限公司 | 用于直流系统的孤岛检测方法及装置 |
CN106849156A (zh) * | 2017-01-06 | 2017-06-13 | 许继集团有限公司 | 一种直流微电网并离网切换母线电压控制平滑方法及系统 |
CN110994689A (zh) * | 2019-12-31 | 2020-04-10 | 科华恒盛股份有限公司 | 并网切换至离网的方法、系统及储能变流器 |
CN111245023B (zh) * | 2020-03-24 | 2021-05-07 | 中国能源建设集团广东省电力设计研究院有限公司 | 一种微电网并离运行切换系统及切换方法 |
CN111864779A (zh) * | 2020-07-29 | 2020-10-30 | 天津电气科学研究院有限公司 | 一种具有自适应功能的储能变流器系统及其离网启动方法 |
-
2020
- 2020-12-31 CN CN202011640870.7A patent/CN112821435B/zh active Active
-
2021
- 2021-09-08 EP EP21913199.2A patent/EP4164080A4/en active Pending
- 2021-09-08 US US18/016,152 patent/US20230283082A1/en active Pending
- 2021-09-08 WO PCT/CN2021/117139 patent/WO2022142452A1/zh unknown
- 2021-09-08 AU AU2021413483A patent/AU2021413483A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103023132A (zh) * | 2012-11-19 | 2013-04-03 | 中国电力科学研究院 | 一种采用储能变流器实现被动离网无缝切换控制方法 |
CN108521140A (zh) * | 2018-04-03 | 2018-09-11 | 深圳电丰电子有限公司 | 一种分布式光伏并离储能逆变系统 |
CN211063355U (zh) * | 2019-12-19 | 2020-07-21 | 上海煦达新能源科技有限公司 | 并离网快速切换控制的储能逆变器 |
CN112821435A (zh) * | 2020-12-31 | 2021-05-18 | 珠海格力电器股份有限公司 | 一种并离网调度方法、装置及储能供电系统 |
Non-Patent Citations (1)
Title |
---|
See also references of EP4164080A4 * |
Also Published As
Publication number | Publication date |
---|---|
AU2021413483A1 (en) | 2023-02-09 |
CN112821435B (zh) | 2024-03-22 |
EP4164080A4 (en) | 2024-02-07 |
CN112821435A (zh) | 2021-05-18 |
US20230283082A1 (en) | 2023-09-07 |
EP4164080A1 (en) | 2023-04-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2022142452A1 (zh) | 并离网调度方法、装置及储能供电系统 | |
US9893561B2 (en) | Power supply conversion system and method of controlling the same | |
US8738954B2 (en) | Power source circuit and control method thereof | |
US8909958B2 (en) | Power load shedding based on a voltage drop rate associated with a power source and a predetermined voltage | |
CN102882267B (zh) | 供电装置、电子设备和供电方法 | |
US8582322B2 (en) | Power reduction of a power supply unit at light loading or no loading | |
WO2021175215A1 (zh) | 供电方法、系统、电源设备和存储介质 | |
EP3840171A1 (en) | Systems and methods for providing direct current and alternating current from a power supply to a load | |
CN106356989A (zh) | 直流输出一体化不间断的电源电路及控制方法 | |
US20140167504A1 (en) | Parallel boost voltage power supply with local energy storage | |
WO2022147995A1 (zh) | 一种电压调节方法、装置及多元供电系统 | |
US10461555B2 (en) | Battery charging for mobile devices | |
JP2002315228A (ja) | 電源装置 | |
US9716393B2 (en) | Battery backup remaining time arrangement | |
WO2021232418A1 (zh) | 充电控制方法、储能模块及用电设备 | |
US11258297B2 (en) | Inverter control strategy for a transient heavy load | |
KR20190093405A (ko) | 리튬 이온 배터리 호환 배터리 컨트롤 장치 및 그 제어 방법 | |
CN114421601A (zh) | 电源系统及其控制方法和控制装置 | |
CN110518663B (zh) | 一种充电控制方法及系统 | |
CN113991820A (zh) | 一种控制方法及储能供电系统 | |
JP2017169304A (ja) | 直流電源システム | |
JP6787473B1 (ja) | 分散型電源システム | |
CN117318242B (zh) | 功率变换装置、功率变换装置的控制方法、储能系统 | |
CN217307310U (zh) | 电池预充电电路及充电设备 | |
CN209795211U (zh) | 一种充电机控制系统 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21913199 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2021913199 Country of ref document: EP Effective date: 20230109 |
|
ENP | Entry into the national phase |
Ref document number: 2021413483 Country of ref document: AU Date of ref document: 20210908 Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |