WO2022110824A1 - 能量调度方法、装置及系统 - Google Patents

能量调度方法、装置及系统 Download PDF

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Publication number
WO2022110824A1
WO2022110824A1 PCT/CN2021/105764 CN2021105764W WO2022110824A1 WO 2022110824 A1 WO2022110824 A1 WO 2022110824A1 CN 2021105764 W CN2021105764 W CN 2021105764W WO 2022110824 A1 WO2022110824 A1 WO 2022110824A1
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WIPO (PCT)
Prior art keywords
energy storage
grid
converter unit
bus voltage
voltage
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PCT/CN2021/105764
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English (en)
French (fr)
Inventor
姜颖异
武建云
黄猛
党培育
黄颂儒
Original Assignee
珠海格力电器股份有限公司
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Publication of WO2022110824A1 publication Critical patent/WO2022110824A1/zh

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    • 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
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Definitions

  • the present disclosure relates to an energy scheduling method, device and system.
  • the optical storage centrifuge system is connected with energy storage battery units, photovoltaic units, grid-side units and motor control units.
  • the coordinated control of the system requires an upper-level dispatch management system to unify dispatch control.
  • the embodiment of the present disclosure provides an energy scheduling method, the method is executed by a control main board, and the control main board is electrically connected with the grid-side converter unit and the energy storage converter unit, and the method includes:
  • the charging and discharging of the energy storage device is controlled by the bus voltage or the voltage of the energy storage device.
  • controlling the grid-side converter unit or the energy storage converter unit to stabilize the busbar voltage according to the power failure condition of the power grid and the enabling condition of the power generation equipment including:
  • the unit that performs the bus voltage stabilization operation is the grid-side converter unit or the energy storage converter unit;
  • the bus voltage is stabilized to the given value of the bus voltage by the determined unit performing the bus voltage stabilization operation.
  • determining the unit for performing the bus voltage stabilization operation includes:
  • the grid-side converter unit is determined as a unit that performs a bus voltage stabilization operation.
  • determining the given value of the bus voltage according to the enabling condition of the power generation equipment including:
  • control the determined unit that performs the bus voltage stabilization operation to perform MPPT optimization control the determined unit that performs the bus voltage stabilization operation to perform MPPT optimization, and determine the calculation result of the MPPT optimization as the bus voltage given value;
  • the preset voltage value is used as the given value of the bus voltage.
  • stabilizing the bus voltage to the given value of the bus voltage using the determined unit for performing the bus voltage stabilizing operation includes:
  • the voltage outer loop control is performed on the difference between the bus voltage given value and the bus voltage actual value, and the given value of the current inner loop control is obtained;
  • the current inner loop control is performed on the difference between the given value of the current inner loop control and the actual current value to obtain a first modulated wave signal, wherein if the bus voltage stabilization is performed by the grid-side converter unit, the actual current value is the actual current value of the grid side. If the bus voltage is stabilized by the energy storage converter unit, the actual current value is the actual current value of the energy storage device;
  • the first modulated wave signal is modulated to obtain the switching pulse signal of the IGBT of the grid-side converter unit or the switching pulse signal of the IGBT of the energy storage converter unit, so as to control the grid side converter unit or the energy storage converter unit Work.
  • controlling the charging and discharging of the energy storage device through the busbar voltage or the voltage of the energy storage device including:
  • the energy storage equipment is controlled to charge and discharge according to the given value of the bus voltage and the actual value of the bus voltage
  • the energy storage equipment is controlled to discharge according to the electricity demand of the electrical equipment
  • the voltage given value of the energy storage device is controlled according to the energy storage charging and discharging strategy, so as to control the energy storage device to charge and discharge.
  • controlling the energy storage device to perform charging and discharging according to a given value of the bus voltage and an actual value of the bus voltage includes:
  • the energy storage device is controlled to enter a discharge state
  • the energy storage device is controlled to enter a charging state.
  • controlling a given voltage value of the energy storage device according to an energy storage charging and discharging strategy, so as to control the energy storage device to perform charging and discharging includes:
  • the given voltage value of the energy storage device is controlled to be smaller than the actual voltage value of the energy storage device, so that the energy storage device enters a discharge state.
  • bringing the energy storage device into a charging state and bringing the energy storage device into a discharging state include:
  • the second modulated wave signal is modulated to obtain the switching pulse signal of the IGBT of the energy storage converter unit, so as to control the operation of the energy storage converter unit.
  • the embodiment of the present disclosure also provides an energy scheduling device, the device is applied to a control main board, and the control main board is electrically connected to the grid-side converter unit and the energy storage converter unit, and the device includes:
  • a determination module used to determine the power failure condition of the power grid and the enabling condition of power generation equipment
  • a first control module configured to control the grid-side converter unit or the energy storage converter unit to stabilize the busbar voltage according to the power failure condition of the power grid and the enabling condition of the power generation equipment;
  • the second control module is configured to control the charging and discharging of the energy storage device through the bus voltage or the voltage of the energy storage device according to the power failure condition of the power grid and the enabling condition of the power generation device.
  • Embodiments of the present disclosure also provide an energy scheduling device, including:
  • Embodiments of the present disclosure further provide an energy scheduling system, including: a power generation device, an energy storage device, and an electrical device, the energy storage device is connected to a busbar through an energy storage converter unit, and a power grid is connected to a grid-side converter unit through a grid-side converter unit.
  • busbars also including:
  • control main board which is electrically connected to the grid-side converter unit and the energy storage converter unit, and the control main board includes the energy scheduling device described in the embodiments of the present disclosure
  • the power plant is directly connected to the busbar.
  • 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, implements the energy scheduling method according to the embodiments of the present disclosure.
  • Fig. 1 is the schematic diagram of the optical storage centrifuge system known to the inventor
  • FIG. 2 is a flowchart of an energy scheduling method provided by some embodiments of the present disclosure
  • FIG. 3 is a schematic diagram of an optical storage centrifuge system provided by some embodiments of the present disclosure.
  • FIG. 4 is a control block diagram of a grid-side converter unit under grid-connected conditions provided by some embodiments of the present disclosure
  • FIG. 5 is a control block diagram of an energy storage converter unit under grid-connected conditions provided by some embodiments of the present disclosure
  • FIG. 6 is a control block diagram of an energy storage converter unit under an off-grid condition provided by some embodiments of the present disclosure
  • FIG. 7 is a schematic diagram of an energy scheduling process provided by some embodiments of the present disclosure.
  • FIG. 8 is a structural block diagram of an energy scheduling apparatus provided by some embodiments of the present disclosure.
  • an optical storage centrifuge system known to the inventor includes: photovoltaic 10, photovoltaic DC/DC 11, energy storage battery 20, energy storage DC/DC 21, power grid 31, rectifier power module 31, inverter Power module 32 , dispatch management system 40 , centrifuge motor 50 and other DC loads 60 .
  • the photovoltaic side is connected to the bus through the photovoltaic DC/DC 11, and the photovoltaic DC/DC 11 is responsible for realizing the photovoltaic MPPT (Maximum Power Point Tracking, maximum power point tracking) optimization.
  • MPPT Maximum Power Point Tracking, maximum power point tracking
  • the energy scheduling of the optical storage centrifuge system is realized based on the communication between the upper-level scheduling management system and the photovoltaic DC/DC, energy storage DC/DC and rectifier power modules.
  • the energy storage control adopts the current command control, and the current command needs to be directly given after the charging and discharging modes are set to realize the release of the stored energy.
  • the host computer ie, the dispatch management system
  • the host computer gives a discharge and indicates 100A, That is to let the energy storage discharge 100A of current.
  • the inventor found that during the actual operation of the system, if a communication failure occurs, it will cause problems in the energy scheduling of the system, and even cause the system to be abnormal.
  • the photovoltaic 10 and the energy storage battery 20 are generating electricity to the busbar side, and the busbar connects the excess power to the grid, but if the grid-side converter unit (rectifier power module 31 ) fails and shuts down, its status needs to be returned to the photovoltaics through communication
  • the dispatch management system 40 cannot know the information of the grid-side failure, and cannot inform the photovoltaic DC/DC 11 and the energy storage DC/DC 21 of the failure. , the corresponding treatment cannot be carried out in time, resulting in excess energy will be accumulated on the bus and cannot be consumed, which will directly lead to system damage.
  • Some embodiments of the present disclosure provide an energy scheduling method, which can be applied to a system integrating power generation, power storage, and power consumption of new energy sources such as photovoltaics and wind power.
  • the method is performed by a control mainboard, which is electrically connected to the grid-side converter unit and the energy storage converter unit.
  • the grid-side converter unit is connected between the power grid and the bus bar to realize the grid-side converter;
  • the energy storage converter unit is connected between the energy storage device and the bus bar to realize the energy storage converter.
  • FIG. 2 is a flowchart of an energy scheduling method provided by some embodiments of the present disclosure. As shown in FIG. 2 , the method includes the following steps:
  • the entire system when the power grid is not powered off, the entire system is in grid-connected mode, and when the power grid is powered off, the entire system is in off-grid mode.
  • the power generation equipment when the power generation equipment is enabled, it means that the power generation equipment is in the open state and can generate electricity; if the power generation equipment is not enabled, it means that the power generation equipment is in the closed state.
  • the main board directly controls the grid-side converter unit or the energy storage converter unit to stabilize the bus voltage, and the main board directly controls the charging and discharging of the energy storage device according to the bus voltage or the voltage of the energy storage device, without setting the upper-level dispatching management system for communication control.
  • the control board controls the grid-side converter unit or the energy storage converter unit to stabilize the bus voltage according to the power failure of the power grid and the enablement of the power generation equipment, and adjusts the voltage of the bus through the bus voltage or the energy storage equipment.
  • the voltage controls the charging and discharging of the energy storage device, and realizes the automatic switching of the charging and discharging mode of the energy storage device.
  • the control board controls the grid-side converter unit and the energy storage converter unit in a unified manner, and there is no need to set up an upper-level dispatch management system to issue communication commands, so as to realize the non-communication control of the grid-side converter unit and the energy storage converter unit, preventing communication Faults cause unstable or even abnormal system power scheduling.
  • controlling the grid-side converter unit or the energy storage converter unit to stabilize the busbar voltage according to the power failure condition of the power grid and the enabling condition of the power generation equipment includes: according to the In the case of power failure of the power grid, it is determined that the unit that performs the bus voltage stabilization operation is the grid-side converter unit or the energy storage converter unit; according to the enablement of the power generation equipment, the given value of the bus voltage is determined; The unit performing the bus voltage stabilization operation stabilizes the bus voltage to the given value of the bus voltage.
  • the energy storage converter unit or the grid-side converter unit performs the bus voltage stabilization operation according to the power failure condition of the power grid
  • the value of the given value of the bus voltage is determined according to the enabling condition of the power generation equipment, and then the determined execution
  • the busbar voltage stabilization operation unit stabilizes the busbar voltage to the given value of the busbar voltage, and can realize the busbar voltage stabilization without communication control, thereby ensuring the stable operation of the system.
  • determining the unit for performing the bus voltage stabilization operation according to the power failure condition of the power grid includes: if the power grid is powered down, determining the energy storage and converter unit as the unit for performing the bus voltage stabilization operation; If the power is not turned off, the grid-side converter unit is determined as the unit that performs the bus voltage stabilization operation.
  • the grid-side converter unit when the power grid is not powered off, the grid-side converter unit controls the bus voltage to stabilize.
  • the grid-side converter unit does not work, and the energy storage converter unit controls the bus voltage to stabilize. Based on the power failure of the power grid, it is automatically and quickly determined that the energy storage converter unit or the grid-side converter unit will perform the bus voltage stabilization operation, which provides a guarantee for the subsequent reliable bus voltage stabilization.
  • determining the given value of the bus voltage according to the enabling condition of the power generation equipment includes: if the power generation equipment is enabled, controlling the determined unit performing the bus voltage stabilization operation to perform MPPT optimization, And determine the calculation result of the MPPT optimization as the given value of the bus voltage; if the power generation equipment is not enabled, the preset voltage value is used as the given value of the bus voltage.
  • the power generation equipment if the power generation equipment is enabled, MPPT optimization needs to be carried out, and the MPPT voltage is provided to the bus bar, so that the power generation equipment can output the maximum power and ensure the power generation performance. Therefore, when the power generation equipment is enabled, the determined unit that performs the bus voltage stabilization operation is controlled to perform MPPT optimization, and the MPPT optimization result (that is, the MPPT voltage that makes the power generation equipment output according to the maximum power) is used as the bus voltage to give Value. MPPT optimization can be realized by using various algorithms, which will not be repeated here. If the power generation equipment is not enabled, the bus voltage is stabilized according to the preset fixed voltage value as the target.
  • the converter unit of the power generation equipment is cancelled, and the MPPT optimization function is realized through the energy storage converter unit or the grid-side converter unit, so as to ensure that the system can still complete the optimization process without the converter unit of the power generation equipment. Guarantee power generation performance.
  • using the determined unit for performing the bus voltage stabilization operation to stabilize the bus voltage to the given value of the bus voltage includes: performing a voltage outer loop on the difference between the given value of the bus voltage and the actual value of the bus voltage control to obtain the given value of the current inner loop control; perform the current inner loop control on the difference between the given value of the current inner loop control and the actual current value to obtain the first modulated wave signal, where if the signal is changed by the grid side The bus voltage is stabilized by the current unit, and the actual current value is the actual current value on the grid side.
  • the actual current value is the actual current value of the energy storage device; for the first
  • the modulated wave signal is modulated to obtain the switching pulse signal of the IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) of the grid-side converter unit or the switching pulse signal of the IGBT of the energy storage converter unit to control the grid-side converter.
  • the flow unit or the energy storage converter unit works.
  • the voltage outer loop control and the current inner loop control are implemented by a PI (Proportional Integral, proportional integral) regulator.
  • control board can send switching pulse signals to the grid-side converter unit or the energy storage converter unit based on the given value of the bus voltage and the actual value of the bus voltage, so as to control the grid-side converter unit or the energy storage converter unit.
  • the unit works to achieve the stability of the bus voltage.
  • controlling the charging and discharging of the energy storage device through the bus voltage or the voltage of the energy storage device including: if the power grid is powered off and If the power generation equipment is enabled, the energy storage equipment will be controlled to charge and discharge according to the given value of the bus voltage and the actual value of the bus voltage; The energy storage device is discharged; if the power grid is not powered off, the voltage given value of the energy storage device is controlled according to the energy storage charging and discharging strategy, so as to control the energy storage device to charge and discharge.
  • the power generation equipment performs the maximum power optimization in the power balance, and the energy storage is used for power supplementation and consumption to provide stable power for the electrical equipment (also called the load).
  • the power used by the electrical equipment is provided by the power generation equipment and the energy storage equipment, and the energy storage converter unit is optimized through MPPT, so that the power generation equipment works in the maximum power generation mode.
  • the energy storage equipment works in the charging mode to consume the power emitted by the power generation equipment. If the power generation power is less than the power required by the electrical equipment, the energy storage equipment works in the discharge mode to supplement the work of the power generation equipment, thereby ensuring the load. operation.
  • the power generation power and the power required by the electrical equipment can be reflected by the bus voltage.
  • the amount of power generated by the power generation equipment is adjusted by the bus voltage. After the bus voltage is stable, the bus voltage will change with the system operation.
  • the actual bus voltage When the value is higher than the set value of the bus voltage, it means that the energy on the bus cannot be consumed in time, that is, the generating power > the power required by the electrical equipment. Therefore, when the power grid is powered off and the generating equipment is enabled, the given value of the bus voltage can be used With the actual value of the bus voltage to control the energy storage device to charge and discharge.
  • the energy storage equipment will not be charged at this time, because there is no power grid and power generation equipment as an energy source, when the electrical equipment needs electricity, the energy storage equipment will enter the discharge state.
  • the power grid is not powered off, it is determined whether charging or discharging is required according to the energy storage charging and discharging strategy.
  • different energy storage charging and discharging strategies may be used, and the embodiment of the present disclosure does not limit the energy storage charging and discharging strategies.
  • electricity generation or grids are used to charge energy storage when electricity prices are low, and energy storage discharges are performed when electricity prices are high to reduce the use of grids.
  • the energy storage device can be directly controlled to charge and discharge, without the need for communication control by the upper-level dispatch management system.
  • the specific charging current and discharging current can be set in advance, and the charging or discharging is directly performed according to the set current during charging or discharging.
  • control board performs charge and discharge control of the energy storage device according to the bus voltage or the voltage of the energy storage device under different circumstances, without setting up an upper-level dispatch management system to issue communication instructions, realizing charge and discharge control without communication, preventing Communication failures lead to unstable or even abnormal system power scheduling.
  • controlling the energy storage device to perform charging and discharging according to a given value of the bus voltage and an actual value of the bus voltage includes: if the given value of the bus voltage is greater than the actual value of the bus voltage, controlling the The energy storage device enters the discharging state; if the given value of the bus voltage is less than or equal to the actual value of the bus voltage, the energy storage device is controlled to enter the charging state.
  • the actual value of the bus voltage is directly collected by the control board.
  • controlling a given voltage value of the energy storage device according to an energy storage charging and discharging strategy, so as to control the energy storage device to perform charging and discharging includes: judging the energy storage device according to the energy storage charging and discharging strategy Whether the device needs charge control or discharge control; if the energy storage device needs charge control, control the given voltage value of the energy storage device to be greater than the actual voltage value of the energy storage device, so that the energy storage device enters charging state; if the energy storage device needs discharge control, the given voltage value of the energy storage device is controlled to be less than the actual voltage value of the energy storage device, so that the energy storage device enters the discharge state. For example, the actual voltage value of the energy storage device is directly collected by the control board.
  • This embodiment can directly control the charging or discharging of the energy storage device through the relationship between the given voltage value of the energy storage device and the actual voltage value, without setting up an upper-level dispatching management system to issue communication commands, so as to realize the charging and discharging control without communication. .
  • the grid-side converter unit and the energy storage converter unit can be realized.
  • the non-communication control of the energy-converting unit can prevent the problem of unstable system power dispatching under the communication failure.
  • bringing the energy storage device into a charging state and bringing the energy storage device into a discharging state include: comparing a given voltage value of the energy storage device and an actual voltage value of the energy storage device The difference value is controlled by the voltage outer loop to obtain the given value of the current inner loop control; the current inner loop control is performed on the difference between the given value of the current inner loop control and the actual current value of the energy storage device to obtain the first Two modulated wave signals; the second modulated wave signal is modulated to obtain the switching pulse signal of the IGBT of the energy storage converter unit, so as to control the operation of the energy storage converter unit.
  • the voltage outer loop control and the current inner loop control are implemented using PI regulators.
  • control mainboard can send a switching pulse signal to the energy storage converter unit based on the given voltage value and the actual voltage value of the energy storage device when the power grid is not powered off, thereby controlling the energy storage converter unit Work to achieve energy storage charge and discharge control.
  • Some embodiments of the present disclosure provide specific implementations of energy scheduling. The same or corresponding terms are explained in the above-mentioned embodiments, and the embodiments introduced below will not be repeated.
  • the above energy scheduling method will be described below with reference to some specific embodiments. However, it should be noted that the specific embodiments are only for better description of the present application, and do not constitute an improper limitation of the present application.
  • optical storage centrifuge system as an example for description.
  • the optical storage centrifuge system of some embodiments of the present disclosure includes: a photovoltaic 10, an energy storage battery 20, an energy storage DC/DC 21, a power grid 30, a rectifier power module 31, an inverter power module 32, and a centrifuge
  • DSP Digital Signal Processing, digital signal processing
  • the optical storage centrifuge system shown in Figure 3 cancels the photovoltaic DC/DC 11 and the dispatch management system 40, and uses the DSP to control the main board 70 to collect the voltage and current on the energy storage battery side. , grid side voltage and current and bus voltage, and send corresponding pulse control signals to energy storage DC/DC 21 and rectifier power module 31 to control energy storage DC/DC 21 and rectifier power module 31 to work.
  • the photovoltaic DC/DC 11 is cancelled, and the photovoltaic power is realized by the energy storage DC/DC 21 (equivalent to the energy storage converter unit in the above embodiment) or the rectification power module 31 (equivalent to the grid-side converter unit in the above embodiment).
  • the MPPT optimization function ensures that the system can still complete the photovoltaic optimization processing without photovoltaic DC/DC 11.
  • the photovoltaic MPPT optimization function is implemented by the rectifier power module 31, as shown in Figure 4; when the grid has no electricity, the energy storage DC/DC 21 stabilizes the bus, and at the same time realizes the photovoltaic MPPT optimization function, control
  • the block diagram is shown in Figure 6.
  • the dispatching management system 40 is cancelled, and the voltage sum of the high voltage side (ie the bus side) and the low voltage side (ie the battery side/grid side) of the energy storage DC/DC 21 and the rectifier power module 31 is directly collected through a chip (ie the DSP control board 70 ).
  • the current state is processed from the algorithm, and the energy storage converter unit and the grid-side converter unit are unifiedly controlled, and the current command of the energy storage is not required.
  • the automatic switching of the battery charging and discharging mode can realize the non-communication control of the energy storage converter unit and the grid-side converter unit, so as to prevent the instability of the system power scheduling caused by the communication failure and even the abnormal problem of the system.
  • the grid-side converter unit controls the bus voltage to stabilize. If the photovoltaic is enabled, the grid-side converter unit performs MPPT optimization, and the calculation result of the MPPT optimization is used as the grid-side converter. The given value of the busbar voltage of the unit; if the PV is not enabled, the fixed voltage value will be used as the given value of the busbar voltage of the grid-side converter unit.
  • the chip directly detects the voltage on the battery side, and realizes the charging or discharging of the energy storage battery by controlling the given value of the battery voltage. The charging and discharging control of the converter unit does not require charging and discharging commands to the energy storage through communication.
  • the control block diagram of the grid-side converter unit in the case of grid-connection is shown in Figure 4.
  • the grid-side converter unit mainly controls the stability of the DC bus voltage.
  • *) Compare the difference with the actual voltage value (Udc) of the feedback DC bus, and obtain the given value of the current inner loop control through the output of the voltage outer loop control. After the difference of the actual current value (Iabc) is controlled by the current inner loop, the modulated wave signal is obtained.
  • the signal is compared with the carrier wave using the SVPWM (Space Vector Pulse Width Modulation, space vector pulse width modulation) modulation strategy to obtain the switching pulse of the grid-side IGBT , use this pulse to control the grid-side rectifier power module to work.
  • SVPWM Space Vector Pulse Width Modulation, space vector pulse width modulation
  • the voltage outer loop control and the current inner loop control are realized by PI regulator.
  • the target voltage value of the DC bus that is, the given value of the bus voltage Udc*
  • one is the calculated output value of the photovoltaic MPPT, which is given to achieve the optimization of the photovoltaic MPPT
  • the other is to set a fixed value, that is Let the bus voltage operate in a fixed value mode.
  • the energy storage converter unit in the case of grid connection, as shown in Figure 5, in the case of grid connection, the energy storage converter unit mainly controls the voltage of the energy storage battery, through the given target voltage value of the energy storage battery (ULi *) Compare the difference with the actual voltage value (ULi) of the feedback energy storage battery, and obtain the given value (ILi*) of the current inner loop control through the output of the voltage outer loop control, which is also the given value of the current inner loop. After the difference with the actual current value (ILi) of the feedback energy storage battery is controlled by the current inner loop, the modulated wave signal is obtained, and the signal is compared with the carrier wave.
  • the SVPWM modulation strategy is used to obtain the switching pulse of the IGBT of the energy storage converter unit.
  • This pulse controls the work of the energy storage converter unit.
  • the voltage outer loop control and the current inner loop control are realized by PI regulator.
  • the target voltage value of the energy storage battery that is, the given value of the energy storage battery voltage ULi* is set to a fixed value, so that the battery voltage works in a fixed value mode.
  • the grid-side converter unit no longer works, and the energy storage converter unit controls the bus voltage to stabilize.
  • the energy storage converter unit performs MPPT optimization, and the MPPT The calculation result of the optimization is used as the given value of the bus voltage of the energy storage converter unit.
  • the photovoltaic is used for the maximum power optimization, and the energy storage battery is used for power supplementation and consumption to provide a stable power for the load. The battery can guarantee the operation of the load together.
  • the photovoltaic is not enabled, the fixed voltage value is used as the given value of the bus voltage of the energy storage converter unit to stabilize the bus voltage. Since there is no power grid and photovoltaic power supply, if there is load power, the energy storage battery is controlled to work in the discharge mode. , that is, the energy storage battery stabilizes the DC bus voltage to supply power to the DC load in the system.
  • the control block diagram of the energy storage converter unit in the off-grid situation is shown in Figure 6.
  • the energy storage converter unit mainly controls the DC bus voltage, and the target voltage value (Udc*) of the given DC bus voltage is passed. Compare the difference with the actual voltage value (Udc) of the feedback DC bus, and obtain the given value (ILi*) of the current inner loop control through the output of the voltage outer loop control. After the difference between the actual current value (ILi) of the energy storage battery is controlled by the current inner loop, the modulated wave signal is obtained, and the signal is compared with the carrier wave.
  • the SVPWM modulation strategy is used to obtain the switching pulse of the IGBT of the energy storage converter unit. Control the work of the energy storage converter unit.
  • the voltage outer loop control and the current inner loop control are realized by PI regulator.
  • the target voltage value of the DC bus that is, the given value of bus voltage Udc*
  • one is the calculated output value of the photovoltaic MPPT, and this value is given to achieve the optimization of the photovoltaic MPPT
  • the other is Set the fixed value, that is, let the bus voltage work in a fixed value mode.
  • FIG. 7 it is a schematic flowchart of the unified control of the grid-side converter unit and the energy storage converter unit, including the following steps:
  • S707 determine whether the energy storage converter unit needs charging control, if yes, go to S708, if not, go to S709. Specifically, whether the energy storage converter unit needs charging and discharging control is determined according to the charging and discharging logic of the energy storage.
  • S708 set the given voltage of the energy storage battery to a value greater than the voltage of the actual energy storage battery (eg, lithium battery), so that the system enters a charging state.
  • the actual energy storage battery eg, lithium battery
  • the system operates in an off-grid mode.
  • the MPPT calculation result is used as the bus reference value.
  • the energy storage system is in a discharge state.
  • the photovoltaic enters the limited power operation, and the energy storage battery enters the charging state.
  • the amount of photovoltaic power generation is adjusted by the voltage of the bus.
  • the actual voltage of the bus is higher than the set voltage, it means that the energy on the bus cannot be consumed in time, resulting in the voltage of the bus.
  • the bus voltage increases, the power emitted by the photovoltaic is not the maximum power, and the output power is limited, so the power operation is limited, which is determined by the characteristics of the photovoltaic itself.
  • the system stabilizes the busbar voltage, and if there is load power, the system enters the discharge state.
  • the grid-side converter ie, grid-side converter unit
  • energy storage DC/DC can replace the photovoltaic DC to solve the problem of system optimization.
  • a chip can directly collect the status of the high-voltage side and low-voltage side of the grid-side converter and the energy storage DC/DC, which can realize the non-communication control of the energy storage DC/DC and the grid-side converter, and prevent the system power from a communication failure. Scheduling instability.
  • the embodiments of the present disclosure utilize the grid-side converter unit and the energy storage converter unit to implement an algorithm to replace the photovoltaic converter (ie, photovoltaic DC/DC) in the grid-connected and off-grid mode.
  • the unified cooperation of the converter units realizes the function of the photovoltaic converter, which solves the problem of photovoltaic optimization in the optical storage centrifuge system.
  • the voltage and current of the high-voltage side (that is, the bus side) and the low-voltage side (that is, the grid side/battery side) of the grid-side converter unit and the energy storage converter unit can be directly collected through a chip, which can realize the grid-side converter unit and the energy storage converter.
  • the non-communication control of the converter unit can prevent the instability of the system power scheduling under the communication failure.
  • the grid-side converter unit and the energy storage converter unit are uniformly controlled and processed algorithmically to prevent system abnormalities and energy scheduling problems caused by communication failures.
  • the current command directly calculates and issues the charging and discharging command of the energy storage system according to the state, and realizes the automatic switching of the charging and discharging mode of the energy storage system.
  • the embodiments of the present disclosure further provide an energy scheduling apparatus, which is used to implement the energy scheduling methods described in the foregoing embodiments.
  • the apparatus is implemented by software and/or hardware.
  • the device is applied to a control main board, and the control main board is electrically connected with the grid-side converter unit and the energy storage converter unit.
  • FIG. 8 is a structural block diagram of an energy scheduling apparatus provided by some embodiments of the present disclosure. As shown in FIG. 8 , the apparatus includes:
  • a determination module 81 configured to determine the power failure condition of the power grid and the enabling condition of the power generation equipment
  • a first control module 82 configured to control the grid-side converter unit or the energy storage converter unit to stabilize the busbar voltage according to the power failure condition of the power grid and the enabling condition of the power generation equipment;
  • the second control module 83 is configured to control the charging and discharging of the energy storage device through the bus voltage or the voltage of the energy storage device according to the power failure condition of the power grid and the enabling condition of the power generation device.
  • the first control module 82 includes:
  • a first determining unit configured to determine a unit for performing a bus voltage stabilization operation according to the power failure condition of the power grid
  • a second determining unit configured to determine a given value of the bus voltage according to the enabling condition of the power generating equipment
  • the first determining unit is specifically used for:
  • the grid-side converter unit is determined as a unit that performs a bus voltage stabilization operation.
  • the second determining unit is specifically used for:
  • control the determined unit that performs the bus voltage stabilization operation to perform MPPT optimization control the determined unit that performs the bus voltage stabilization operation to perform MPPT optimization, and determine the calculation result of the MPPT optimization as the bus voltage given value;
  • the preset voltage value is used as the given value of the bus voltage.
  • the first control unit includes:
  • the first control sub-unit is used for performing voltage outer loop control on the difference between the given value of the bus voltage and the actual value of the bus voltage, so as to obtain the given value of the current inner loop control;
  • the second control sub-unit is used to perform current inner loop control on the difference between the given value of the current inner loop control and the actual current value to obtain the first modulated wave signal.
  • the voltage is stable, the actual current value is the actual current value on the grid side, if the bus voltage is stabilized by the energy storage converter unit, the actual current value is the actual current value of the energy storage device;
  • the modulation subunit is used to modulate the first modulated wave signal to obtain the switching pulse signal of the IGBT of the grid-side converter unit or obtain the switching pulse signal of the IGBT of the energy storage converter unit, so as to control the grid-side converter unit Or the energy storage converter unit works.
  • the second control module 83 includes:
  • a second control unit configured to control the energy storage device to charge and discharge according to the given value of the bus voltage and the actual value of the bus voltage if the power grid is powered off and the power generation device is enabled;
  • a third control unit configured to control the energy storage device to discharge according to the electricity demand of the electrical equipment if the power grid is powered off and the power generation equipment is not enabled;
  • the fourth control unit is configured to control a given voltage value of the energy storage device according to the energy storage charging and discharging strategy, so as to control the energy storage device to perform charging and discharging, if the power grid is not powered off.
  • the second control unit is specifically used to:
  • the energy storage device is controlled to enter a discharge state
  • the energy storage device is controlled to enter a charging state.
  • the fourth control unit is specifically used for:
  • a judgment subunit configured to judge whether the energy storage device needs charging control or discharge control according to the energy storage charging and discharging strategy
  • the third control subunit is configured to control the given voltage value of the energy storage device to be greater than the actual voltage value of the energy storage device if the energy storage device needs charging control, so that the energy storage device enters charging state;
  • the fourth control sub-unit is configured to control the given voltage value of the energy storage device to be smaller than the actual voltage value of the energy storage device if the energy storage device needs discharge control, so that the energy storage device enters the discharge state.
  • the third control subunit and the fourth control subunit are specifically used for:
  • the second modulated wave signal is modulated to obtain the switching pulse signal of the IGBT of the energy storage converter unit, so as to control the operation of the energy storage converter unit.
  • the above apparatus can execute the method provided by the embodiments of the present disclosure, and has corresponding functional modules and beneficial effects for executing the method.
  • the above apparatus can execute the method provided by the embodiments of the present disclosure, and has corresponding functional modules and beneficial effects for executing the method.
  • Some embodiments of the present disclosure provide an electronic device (which may also be referred to as an energy scheduling apparatus), comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores data that can be accessed by Instructions executed by the at least one processor, the instructions being executed by the at least one processor, so that the at least one processor can implement the energy scheduling method according to the above embodiment.
  • Some embodiments of the present disclosure provide an energy scheduling system, including: a power generation device, an energy storage device, and an electrical device, the energy storage device is connected to a busbar through an energy storage converter unit, and a power grid is connected to the busbar through a grid-side converter unit , the power generation equipment is directly connected to the busbar.
  • the energy scheduling system further includes: a control main board, which is electrically connected to the grid-side converter unit and the energy storage converter unit, and the control main board includes the energy scheduling device described in the above embodiments.
  • the energy scheduling system of the above embodiment cancels the converter unit of the power generation equipment, and realizes the MPPT optimization function through the energy storage converter unit or the grid-side converter unit, so as to ensure that the system can still be completed without the converter unit of the power generation equipment.
  • Optimal processing The upper-level dispatching management system is cancelled, and the bus voltage, grid-side voltage and current, and energy-storage-side voltage and current are directly collected through the control board, and processed algorithmically, the energy-storage conversion unit and the grid-side conversion unit are controlled in a unified manner, without the need for a given storage unit.
  • Some embodiments of the present disclosure provide a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the energy scheduling method described in the foregoing embodiments of the present disclosure.
  • 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 computer software products can be stored in a computer-readable storage medium, such as ROM/RAM. , disk, optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments or parts of embodiments.

Abstract

本公开公开一种能量调度方法、装置及系统。其中，该方法由控制主板执行，控制主板与网侧变流单元及储能变流单元电连接，该方法包括：确定电网掉电情况和发电设备的使能情况；根据电网掉电情况和发电设备的使能情况，控制网侧变流单元或者储能变流单元进行母线电压的稳定；根据电网掉电情况和发电设备的使能情况，通过母线电压或储能设备的电压控制储能设备的充放电。

Description

能量调度方法、装置及系统
相关申请的交叉引用
本申请是以CN申请号为202011334255.3，申请日为2020年11月24日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及一种能量调度方法、装置及系统。
背景技术
光储离心机系统接入有储能电池单元、光伏单元、网侧单元和电机控制单元，系统的协同控制需要一个上层调度管理系统来统一调度控制。
发明内容
本公开实施例提供了一种能量调度方法，所述方法由控制主板执行，所述控制主板与网侧变流单元及储能变流单元电连接，所述方法包括：
确定电网掉电情况和发电设备的使能情况；
根据所述电网掉电情况和所述发电设备的使能情况，控制所述网侧变流单元或者所述储能变流单元进行母线电压的稳定；
根据所述电网掉电情况和所述发电设备的使能情况，通过母线电压或储能设备的电压，控制所述储能设备的充放电。
在一些实施例中，根据所述电网掉电情况和所述发电设备的使能情况，控制所述网侧变流单元或者所述储能变流单元进行母线电压的稳定，包括：
根据所述电网掉电情况，确定执行母线电压稳定操作的单元为所述网侧变流单元或者所述储能变流单元；
根据所述发电设备的使能情况，确定母线电压给定值；
利用已确定的执行母线电压稳定操作的单元将母线电压稳定至所述母线电压给定值。
在一些实施例中，根据所述电网掉电情况，确定执行母线电压稳定操作的单元，包括：
若电网掉电，则确定所述储能变流单元作为执行母线电压稳定操作的单元；
若电网未掉电，则确定所述网侧变流单元作为执行母线电压稳定操作的单元。
在一些实施例中，根据所述发电设备的使能情况，确定母线电压给定值，包括：
若发电设备使能，则控制所述已确定的执行母线电压稳定操作的单元进行MPPT寻优，并确定MPPT寻优的计算结果作为所述母线电压给定值；
若发电设备未使能，则将预设电压值作为所述母线电压给定值。
在一些实施例中，利用已确定的执行母线电压稳定操作的单元将母线电压稳定至所述母线电压给定值，包括：
对母线电压给定值与母线电压实际值的差值进行电压外环控制，得到电流内环控制的给定值；
对所述电流内环控制的给定值与实际电流值的差值进行电流内环控制，得到第一调制波信号，其中，若由网侧变流单元进行母线电压稳定，所述实际电流值为网侧实际电流值，若由储能变流单元进行母线电压稳定，所述实际电流值为储能设备的实际电流值；
对所述第一调制波信号进行调制，得到网侧变流单元的IGBT的开关脉冲信号或者得到储能变流单元的IGBT的开关脉冲信号，以控制网侧变流单元或储能变流单元工作。
在一些实施例中，根据所述电网掉电情况和所述发电设备的使能情况，通过母线电压或储能设备的电压，控制所述储能设备的充放电，包括：
若电网掉电且发电设备使能，则根据母线电压给定值与母线电压实际值，控制所述储能设备进行充放电；
若电网掉电且发电设备未使能，则根据用电设备的用电需求控制所述储能设备进行放电；
若电网未掉电，则根据储能充放电策略控制所述储能设备的电压给定值，以控制所述储能设备进行充放电。
在一些实施例中，根据母线电压给定值与母线电压实际值，控制所述储能设备进行充放电，包括：
若所述母线电压给定值大于所述母线电压实际值，则控制所述储能设备进入放电状态；
若所述母线电压给定值小于或等于所述母线电压实际值，则控制所述储能设备进 入充电状态。
在一些实施例中，根据储能充放电策略控制所述储能设备的电压给定值，以控制所述储能设备进行充放电，包括：
根据所述储能充放电策略判断所述储能设备需要充电控制还是放电控制；
若所述储能设备需要充电控制，则控制所述储能设备的电压给定值大于所述储能设备的实际电压值，以使所述储能设备进入充电状态；
若所述储能设备需要放电控制，则控制所述储能设备的电压给定值小于所述储能设备的实际电压值，以使所述储能设备进入放电状态。
在一些实施例中，使所述储能设备进入充电状态以及使所述储能设备进入放电状态，包括：
对所述储能设备的电压给定值与所述储能设备的实际电压值的差值进行电压外环控制，得到电流内环控制的给定值；
对所述电流内环控制的给定值与所述储能设备的实际电流值的差值进行电流内环控制，得到第二调制波信号；
对所述第二调制波信号进行调制，得到所述储能变流单元的IGBT的开关脉冲信号，以控制所述储能变流单元工作。
本公开实施例还提供了一种能量调度装置，所述装置应用于控制主板，所述控制主板与网侧变流单元及储能变流单元电连接，所述装置包括：
确定模块，用于确定电网掉电情况和发电设备的使能情况；
第一控制模块，用于根据所述电网掉电情况和所述发电设备的使能情况，控制所述网侧变流单元或者所述储能变流单元进行母线电压的稳定；
第二控制模块，用于根据所述电网掉电情况和所述发电设备的使能情况，通过母线电压或储能设备的电压，控制所述储能设备的充放电。
本公开实施例还提供了一种能量调度装置，包括：
至少一个处理器；以及
与所述至少一个处理器通信连接的存储器，其中，所述存储器存储有指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器实现上述任意一个实施例所述的能量调度方法。
本公开实施例还提供了一种能量调度系统，包括：发电设备、储能设备和用电设备，所述储能设备通过储能变流单元连接至母线，电网通过网侧变流单元连接至母线， 还包括：
控制主板，所述控制主板与所述网侧变流单元及所述储能变流单元电连接，所述控制主板包括本公开实施例所述的能量调度装置；
所述发电设备直接连接至所述母线。
本公开实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，所述程序被处理器执行时实现如本公开实施例所述的能量调度方法。
附图说明
图1是发明人知晓的光储离心机系统的示意图；
图2是本公开一些实施例提供的能量调度方法的流程图；
图3是本公开一些实施例提供的光储离心机系统的示意图；
图4是本公开一些实施例提供的并网情况下网侧变流单元的控制框图；
图5是本公开一些实施例提供的并网情况下储能变流单元的控制框图；
图6是本公开一些实施例提供的离网情况下储能变流单元的控制框图；
图7是本公开一些实施例提供的能量调度流程示意图；
图8是本公开一些实施例提供的能量调度装置的结构框图。
具体实施方式
为了使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开作进一步地详细描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本公开保护的范围。
需要说明的是，本公开的说明书和权利要求书及附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本公开的实施例能够以除了在这里图示或描述的那些以外的顺序实施。需要说明的是，在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行，并且，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
如图1所示，发明人知晓的一种光储离心机系统包括：光伏10、光伏DC/DC 11、储能电池20、储能DC/DC 21、电网31、整流功率模块31、逆变功率模块32、调度 管理系统40、离心机电机50和其他直流负载60。光伏侧通过光伏DC/DC 11接入母线，光伏DC/DC 11负责实现光伏的MPPT(Maximum Power Point Tracking，最大功率点跟踪)寻优。
光储离心机系统的能量调度是基于上层的调度管理系统与光伏DC/DC、储能DC/DC和整流功率模块进行通讯而实现的。例如，储能控制是采用电流指令控制，需要在充电和放电模式设定后直接给定电流指令，实现储能能量的释放。具体的，上位机(即调度管理系统)给定储能DC/DC充电或放电的指令，并通过指令给出具体的充电/放电电流，举例而言，上位机给定放电，并指示100A，即是让储能放电100A的电流。
通过上述基于通讯的统一调度方案，发明人发现，在系统实际运行过程中，如果出现通讯故障，会导致系统能量调度出现问题，甚至会导致系统出现异常。例如，光伏10和储能电池20在向母线侧发电，母线将多余的电能并网输送，但如果网侧变流单元(整流功率模块31)出现故障停机，需要通过通讯将其状态返回给光伏DC/DC 11和储能DC/DC 21，如果此时出现通讯故障，则调度管理系统40无法获知网侧故障的消息，也无法将故障情况告知光伏DC/DC 11和储能DC/DC 21，无法及时进行相应处理，从而导致多余的能量将聚集在母线上无法消耗，直接导致系统损坏。
本公开一些实施例提供一种能量调度方法，可应用于光伏、风力等新能源的发电、储电和用电一体的系统。该方法由控制主板执行，该控制主板与网侧变流单元及储能变流单元电连接。网侧变流单元连接在电网与母线之间，用于实现网侧的变流；储能变流单元连接在储能设备与母线之间，用于实现储能的变流。
图2是本公开一些实施例提供的能量调度方法的流程图，如图2所示，该方法包括以下步骤：
S201，确定电网掉电情况和发电设备的使能情况。
S202，根据所述电网掉电情况和所述发电设备的使能情况，控制所述网侧变流单元或者所述储能变流单元进行母线电压的稳定。
S203，根据所述电网掉电情况和所述发电设备的使能情况，通过母线电压或储能设备的电压，控制所述储能设备的充放电。
其中，电网未掉电，整个系统处于并网模式，电网掉电，整个系统处于离网模式。发电设备使能，表示发电设备处于打开状态，可以进行发电；发电设备未使能，表示发电设备处于关闭状态。通过控制主板直接控制网侧变流单元或者储能变流单元来稳 定母线电压，通过控制主板直接根据母线电压或储能设备的电压来控制储能设备充放电，无需设置上层调度管理系统进行通讯控制。
上述实施例的能量调度方法，控制主板根据电网掉电情况和发电设备的使能情况，控制网侧变流单元或者储能变流单元进行母线电压的稳定，并通过母线电压或储能设备的电压控制储能设备充放电，实现储能设备充放电模式的自动切换。由控制主板对网侧变流单元和储能变流单元进行统一控制，无需设置上层调度管理系统来下发通讯指令，实现网侧变流单元和储能变流单元的无通讯控制，防止通讯故障导致系统功率调度不稳定甚至出现异常的问题。
在一些实施方式中，根据所述电网掉电情况和所述发电设备的使能情况，控制所述网侧变流单元或者所述储能变流单元进行母线电压的稳定，包括：根据所述电网掉电情况，确定执行母线电压稳定操作的单元为所述网侧变流单元或者所述储能变流单元；根据所述发电设备的使能情况，确定母线电压给定值；利用已确定的执行母线电压稳定操作的单元将母线电压稳定至所述母线电压给定值。本实施方式根据电网掉电情况确定由储能变流单元或网侧变流单元来执行母线电压稳定操作，根据发电设备使能情况确定母线电压给定值的取值，然后利用已确定的执行母线电压稳定操作的单元将母线电压稳定到母线电压给定值，无需通讯控制即可实现母线电压稳定，从而保证系统稳定运行。
在一些实施方式中，根据所述电网掉电情况，确定执行母线电压稳定操作的单元，包括：若电网掉电，则确定所述储能变流单元作为执行母线电压稳定操作的单元；若电网未掉电，则确定所述网侧变流单元作为执行母线电压稳定操作的单元。
本实施方式在电网未掉电的情况下，由网侧变流单元控制母线电压稳定，在电网掉电的情况下，网侧变流单元不工作，由储能变流单元控制母线电压稳定。基于电网掉电情况，自动快速确定由储能变流单元或网侧变流单元来执行母线电压稳定操作，为后续可靠地母线电压稳定提供保障。
在一些实施方式中，根据所述发电设备的使能情况，确定母线电压给定值，包括：若发电设备使能，则控制所述已确定的执行母线电压稳定操作的单元进行MPPT寻优，并确定MPPT寻优的计算结果作为所述母线电压给定值；若发电设备未使能，则将预设电压值作为所述母线电压给定值。
其中，若发电设备使能，需要进行MPPT寻优，通过向母线提供MPPT电压，以使发电设备按照最大功率输出，保证发电性能。因此在发电设备使能的情况下，控 制已确定的执行母线电压稳定操作的单元进行MPPT寻优，且将MPPT寻优结果(即，使发电设备按照最大功率输出的MPPT电压)作为母线电压给定值。MPPT寻优可采用多种算法实现，在此不再赘述。若发电设备未使能，则按照预先设置的固定电压值作为目标进行母线电压稳定。
本实施方式取消发电设备的变流单元，通过储能变流单元或网侧变流单元来实现MPPT寻优功能，保障系统在没有发电设备的变流单元的情况下仍可以完成寻优处理，保障发电性能。
在一些实施方式中，利用已确定的执行母线电压稳定操作的单元将母线电压稳定至所述母线电压给定值，包括：对母线电压给定值与母线电压实际值的差值进行电压外环控制，得到电流内环控制的给定值；对所述电流内环控制的给定值与实际电流值的差值进行电流内环控制，得到第一调制波信号，其中，若由网侧变流单元进行母线电压稳定，所述实际电流值为网侧实际电流值，若由储能变流单元进行母线电压稳定，所述实际电流值为储能设备的实际电流值；对所述第一调制波信号进行调制，得到网侧变流单元的IGBT(Insulated Gate Bipolar Transistor，绝缘栅双极型晶体管)的开关脉冲信号或者得到储能变流单元的IGBT的开关脉冲信号，以控制网侧变流单元或储能变流单元工作。例如，电压外环控制和电流内环控制采用PI(Proportional Integral，比例积分)调节器来实现。
通过本实施方式的步骤，控制主板能够基于母线电压给定值与母线电压实际值向网侧变流单元或储能变流单元发送开关脉冲信号，从而控制网侧变流单元或储能变流单元进行工作，实现母线电压的稳定。
在一些实施方式中，根据所述电网掉电情况和所述发电设备的使能情况，通过母线电压或储能设备的电压，控制所述储能设备的充放电，包括：若电网掉电且发电设备使能，则根据母线电压给定值与母线电压实际值，控制所述储能设备进行充放电；若电网掉电且发电设备未使能，则根据用电设备的用电需求控制所述储能设备进行放电；若电网未掉电，则根据储能充放电策略控制所述储能设备的电压给定值，以控制所述储能设备进行充放电。
其中，若电网掉电且发电设备使能，功率平衡上发电设备做最大功率寻优，储能做功率的补充和消纳，为用电设备(也称为负载)提供稳定功率。具体的，电网停电后，用电设备使用的功率由发电设备和储能设备提供，储能变流单元通过MPPT寻优，使得发电设备工作在最大发电模式，如果发电功率＞用电设备所需功率，储能设备工 作在充电模式，以消耗发电设备发出的功率，如果发电功率＜用电设备所需功率，储能设备工作在放电模式，为发电设备的工作做补充，由此一起保障负载的运行。而发电功率和用电设备所需功率可以通过母线电压来体现，发电设备发电多少是受母线电压的大小调节的，母线电压稳定后，随着系统运行，母线电压会发生变化，当母线电压实际值高于母线电压设定值时，说明母线上的能量无法及时消耗，即发电功率＞用电设备所需功率，因此在电网掉电且发电设备使能的情况下可以通过母线电压给定值与母线电压实际值来控制储能设备进行充放电。
若电网掉电且发电设备未使能，此时储能设备不会进行充电，因为没有电网和发电设备作为能量来源，当用电设备需要用电的时候，储能设备就进入放电状态。
若电网未掉电，根据储能充放电策略确定需要充电还是放电，具体可以使用不同的储能充放电策略，本公开实施例对储能充放电策略不进行限制。例如，结合电网电价在电价低的时候利用发电或电网进行储能充电，在电价高的时候进行储能放电以减少对电网的使用。通过控制储能设备的电压给定值，能够直接控制储能设备进行充放电，无需上层调度管理系统进行通讯控制。具体的充电电流和放电电流可以提前设置好，在充电或放电时直接按照该设置好的电流进行充电或放电。
本实施方式由控制主板在不同的情况下根据母线电压或储能设备的电压进行储能设备的充放电控制，无需设置上层调度管理系统来下发通讯指令，实现无通讯的充放电控制，防止通讯故障导致系统功率调度不稳定甚至出现异常的问题。
在一些实施方式中，根据母线电压给定值与母线电压实际值，控制所述储能设备进行充放电，包括：若所述母线电压给定值大于所述母线电压实际值，则控制所述储能设备进入放电状态；若所述母线电压给定值小于或等于所述母线电压实际值，则控制所述储能设备进入充电状态。例如，母线电压实际值由控制主板直接采集。
本实施方式通过母线电压给定值与母线电压实际值的大小关系，可以直接判定出母线上是否存在多余能量或者需要补充能量，从而控制储能设备进入充电或放电，无需设置上层调度管理系统来下发通讯指令，实现无通讯的充放电控制。
在一些实施方式中，根据储能充放电策略控制所述储能设备的电压给定值，以控制所述储能设备进行充放电，包括：根据所述储能充放电策略判断所述储能设备需要充电控制还是放电控制；若所述储能设备需要充电控制，则控制所述储能设备的电压给定值大于所述储能设备的实际电压值，以使所述储能设备进入充电状态；若所述储能设备需要放电控制，则控制所述储能设备的电压给定值小于所述储能设备的实际电 压值，以使所述储能设备进入放电状态。例如，储能设备的实际电压值由控制主板直接采集。
本实施方式通过储能设备的电压给定值与实际电压值的大小关系，可以直接控制储能设备进入充电或放电，无需设置上层调度管理系统来下发通讯指令，实现无通讯的充放电控制。
通过控制主板直接采集网侧变流单元和储能变流单元的高压侧(即母线侧)和低压侧(即网侧/电池侧)的电压和电流状态，能够实现网侧变流单元和储能变流单元的无通讯控制，防止通讯故障下系统功率调度不稳定的问题。
在一些实施方式中，使所述储能设备进入充电状态以及使所述储能设备进入放电状态，包括：对所述储能设备的电压给定值与所述储能设备的实际电压值的差值进行电压外环控制，得到电流内环控制的给定值；对所述电流内环控制的给定值与所述储能设备的实际电流值的差值进行电流内环控制，得到第二调制波信号；对所述第二调制波信号进行调制，得到所述储能变流单元的IGBT的开关脉冲信号，以控制所述储能变流单元工作。在一些实施例中，电压外环控制和电流内环控制采用PI调节器来实现。
通过本实施方式的步骤，控制主板能够在电网未掉电的情况下，基于储能设备的电压给定值与实际电压值向储能变流单元发送开关脉冲信号，从而控制储能变流单元进行工作，实现储能充放电控制。
本公开一些实施例提供了能量调度的具体实施方式。与上述实施例相同或相应的术语解释，在下面介绍的实施例不再赘述。下面结合一些具体实施例对上述能量调度方法进行说明，然而值得注意的是，该具体实施例仅是为了更好地说明本申请，并不构成对本申请的不当限定。
下面的实施例以光储离心机系统为例进行说明。
如图3所示，本公开一些实施例的光储离心机系统包括：光伏10、储能电池20、储能DC/DC 21、电网30、整流功率模块31、逆变功率模块32、离心机电机50、其他直流负载60和DSP(Digital Signal Processing，数字信号处理)控制主板70。
与图1所示的光储离心机系统相比，图3所示的光储离心机系统取消了光伏DC/DC 11和调度管理系统40，利用DSP控制主板70采集储能电池侧的电压电流、网侧电压电流以及母线电压，并向储能DC/DC 21和整流功率模块31发出相应的脉冲控制信号，以控制储能DC/DC 21和整流功率模块31来工作。
取消光伏DC/DC 11，通过储能DC/DC 21(相当于上述实施例中的储能变流单元)或整流功率模块31(相当于上述实施例中的网侧变流单元)来实现光伏MPPT寻优功能，保障系统在没有光伏DC/DC 11的情况下仍可以完成光伏的寻优处理。在电网有电时，光伏MPPT寻优功能由整流功率模块31开展实施，如图4所示；在电网没有电时，由储能DC/DC 21稳定母线，同时实现光伏MPPT寻优功能，控制框图如图6所示。
取消调度管理系统40，通过一个芯片(即DSP控制主板70)直接采集储能DC/DC21和整流功率模块31的高压侧(即母线侧)和低压侧(即电池侧/网侧)的电压和电流状态，从算法上处理，将储能变流单元和网侧变流单元统一控制，不需要给定储能的电流指令，直接根据状态计算下发储能电池的充放电指令，实现储能电池充放电模式的自动切换，能够实现储能变流单元和网侧变流单元的无通讯控制，防止通讯故障导致系统功率调度的不稳定性甚至导致系统出现异常的问题。
电网正常时(即系统按照并网模式运行)，网侧变流单元控制母线电压稳定，如果光伏使能，网侧变流单元做MPPT寻优，将MPPT寻优的计算结果作为网侧变流单元的母线电压给定值；如果光伏未使能，则将固定电压值作为网侧变流单元的母线电压给定值。同时根据储能充放电需求，芯片直接检测电池侧的电压，通过控制电池电压的给定值来实现储能电池进行充电或放电，由芯片直接实现系统控制，不再需要上位机去调度储能变流单元的充放电控制，无需通过通讯给储能下充放电指令。
并网情况下网侧变流单元的控制框图，如图4所示，在并网情况下，网侧变流单元主要是控制直流母线电压的稳定，通过给定直流母线的目标电压值(Udc*)和反馈的直流母线的实际电压值(Udc)进行差值比较，通过电压外环控制的输出来得到电流内环控制的给定，同样在电流内环的给定值与反馈的网侧实际电流值(Iabc)的差值经过电流内环控制后，得到调制波信号，该信号和载波比较采用SVPWM(Space Vector Pulse Width Modulation，空间矢量脉宽调制)调制策略得到网侧IGBT的开关脉冲，用此脉冲来控制网侧整流功率模块来工作。其中，电压外环控制和电流内环控制采用PI调节器实现。直流母线的目标电压值，即母线电压给定值Udc*主要有两个选择，一个是光伏MPPT的计算输出值，给定此值来实现光伏MPPT的寻优，另一个是设置固定值，即让母线电压工作在一个固定值模式。
并网情况下储能变流单元的控制框图，如图5所示，在并网情况下，储能变流单元主要控制储能电池的电压，通过给定储能电池的目标电压值(ULi*)和反馈的储能 电池的实际电压值(ULi)进行差值比较，通过电压外环控制的输出来得到电流内环控制的给定(ILi*)，同样在电流内环的给定值与反馈的储能电池的实际电流值(ILi)的差值经过电流内环控制后，得到调制波信号，该信号和载波比较采用SVPWM调制策略得到储能变流单元的IGBT的开关脉冲，用此脉冲来控制储能变流单元的工作。其中，电压外环控制和电流内环控制采用PI调节器实现。储能电池的目标电压值，即储能电池电压给定值ULi*是设置固定值，就让电池电压工作在一个固定值模式。
电网停电时(即系统按照离网模式运行)，网侧变流单元不再工作，由储能变流单元控制母线电压稳定，如果光伏使能，储能变流单元做MPPT寻优，将MPPT寻优的计算结果作为储能变流单元的母线电压给定值，功率平衡上光伏做最大功率寻优，储能电池做功率的补充和消纳，为负载提供一个稳定功率，由光伏和储能电池一起保障负载的运行。如果光伏未使能，则将固定电压值作为储能变流单元的母线电压给定值，稳定母线电压，由于没有电网和光伏供电，如果有负载用电，则控制储能电池工作在放电模式，即储能电池稳定直流母线电压给系统中的直流负载供电。
离网情况下储能变流单元的控制框图，如图6所示，在离网情况下，储能变流单元主要控制直流母线电压，通过给定直流母线电压的目标电压值(Udc*)和反馈的直流母线的实际电压值(Udc)进行差值比较，通过电压外环控制的输出来得到电流内环控制的给定(ILi*)，同样在电流内环的给定值与反馈的储能电池的实际电流值(ILi)的差值经过电流内环控制后，得到调制波信号，该信号和载波比较采用SVPWM调制策略得到储能变流单元的IGBT的开关脉冲，用此脉冲来控制储能变流单元的工作。其中，电压外环控制和电流内环控制采用PI调节器实现。离网情况下，直流母线的目标电压值，即母线电压给定值Udc*主要有两个选择，一个是光伏MPPT的计算输出值，给定此值来实现光伏MPPT的寻优，另一个是设置固定值，即让母线电压工作在一个固定值模式。
参考图7，为网侧变流单元和储能变流单元统一控制的流程示意图，包括以下步骤：
S701，开始。
S702，判断光储离心机系统的电网是否掉电，若否，进入S703，若是，进入S710。
S703，系统按并网模式运行。
S704，判断用户是否使能光伏MPPT，若是，进入S705，若否，进入S706。
S705，MPPT计算结果作为母线给定值。
S706，设置固定母线电压值控制。
S707，判断储能变流单元是否需要充电控制，若是，进入S708，若否，进入S709。具体的，储能变流单元是否需要充放电控制是根据储能充放电逻辑来判断的，例如，按照用电峰谷时段，预先设置某时段需要充电，某时段需要放电。
S708，设定储能电池给定电压为大于实际储能电池(例如锂电池)电压的值，使得系统进入充电状态。
S709，设定储能电池给定电压为小于实际储能电池(例如锂电池)电压的值，使得系统进入放电状态。
S710，系统按离网模式运行。
S711，判断用户是否使能光伏MPPT，若是，进入S712，若否，进入S716。
S712，MPPT计算结果作为母线给定值。
S713，判断母线给定值是否大于实际母线值，若是，进入S714，若否，进入S715。
S714，储能系统处于放电状态。
S715，光伏进入限制功率运行，储能电池进入充电状态。离网情况下，若光伏和储能电池都接入，光伏发电多少是受母线电压的大小调节的，当母线实际电压高于设定电压时，说明母线上的能量无法及时消耗，导致母线电压升高，母线电压升高后，光伏发出的功率不是最大功率，发出的功率受到限制，因此限制功率运行，这个是光伏的自身特性决定的。
S716，设置固定母线电压值控制。
S717，系统稳定母线电压，若有负载用电时，系统进入放电状态。
综上，在并网和离网情况下，通过网侧变流器(即网侧变流单元)和储能DC/DC能够替代光伏DC，解决系统寻优实现的问题。同时通过一个芯片直接采集网侧变流器和储能DC/DC的高压侧和低压侧的状态，能够实现储能DC/DC和网侧变流器的无通讯控制，防止通讯故障下系统功率调度的不稳定性。
综上，本公开实施例利用网侧变流单元和储能变流单元在并离网模式下通过算法实施替代光伏变流器(即光伏DC/DC)，通过网侧变流单元和储能变流单元的统一配合实现光伏变流器的功能，解决了光储离心机系统光伏寻优实现的问题。同时通过一个芯片直接采集网侧变流单元和储能变流单元的高压侧(即母线侧)和低压侧(即网侧/电池侧)的电压和电流，能够实现网侧变流单元和储能变流单元的无通讯控制，防止通讯故障下系统功率调度的不稳定性。将网侧变流单元和储能变流单元统一控制， 从算法上处理，防止因为通讯故障导致系统出现异常，出现能量调度问题，同时省去了上层调度管理系统，不需要给定储能的电流指令，直接根据状态计算下发储能的充放电指令，实现储能系统充放电模式的自动切换。
本公开实施例还提供了一种能量调度装置，用于实现上述实施例所述的能量调度方法。该装置通过软件和/或硬件实现。该装置应用于控制主板，控制主板与网侧变流单元及储能变流单元电连接。
图8是本公开一些实施例提供的能量调度装置的结构框图，如图8所示，该装置包括：
确定模块81，用于确定电网掉电情况和发电设备的使能情况；
第一控制模块82，用于根据所述电网掉电情况和所述发电设备的使能情况，控制所述网侧变流单元或者所述储能变流单元进行母线电压的稳定；
第二控制模块83，用于根据所述电网掉电情况和所述发电设备的使能情况，通过母线电压或储能设备的电压，控制所述储能设备的充放电。
在一些实施例中，第一控制模块82包括：
第一确定单元，用于根据所述电网掉电情况，确定执行母线电压稳定操作的单元；
第二确定单元，用于根据所述发电设备的使能情况，确定母线电压给定值；
第一控制单元，用于利用已确定的执行母线电压稳定操作的单元将母线电压稳定至所述母线电压给定值。
在一些实施例中，第一确定单元具体用于：
若电网掉电，则确定所述储能变流单元作为执行母线电压稳定操作的单元；
若电网未掉电，则确定所述网侧变流单元作为执行母线电压稳定操作的单元。
在一些实施例中，第二确定单元具体用于：
若发电设备使能，则控制所述已确定的执行母线电压稳定操作的单元进行MPPT寻优，并确定MPPT寻优的计算结果作为所述母线电压给定值；
若发电设备未使能，则将预设电压值作为所述母线电压给定值。
在一些实施例中，第一控制单元包括：
第一控制子单元，用于对母线电压给定值与母线电压实际值的差值进行电压外环控制，得到电流内环控制的给定值；
第二控制子单元，用于对所述电流内环控制的给定值与实际电流值的差值进行电流内环控制，得到第一调制波信号，其中，若由网侧变流单元进行母线电压稳定，所 述实际电流值为网侧实际电流值，若由储能变流单元进行母线电压稳定，所述实际电流值为储能设备的实际电流值；
调制子单元，用于对所述第一调制波信号进行调制，得到网侧变流单元的IGBT的开关脉冲信号或者得到储能变流单元的IGBT的开关脉冲信号，以控制网侧变流单元或储能变流单元工作。
在一些实施例中，第二控制模块83包括：
第二控制单元，用于若电网掉电且发电设备使能，则根据母线电压给定值与母线电压实际值，控制所述储能设备进行充放电；
第三控制单元，用于若电网掉电且发电设备未使能，则根据用电设备的用电需求控制所述储能设备进行放电；
第四控制单元，用于若电网未掉电，则根据储能充放电策略控制所述储能设备的电压给定值，以控制所述储能设备进行充放电。
在一些实施例中，第二控制单元具体用于：
若所述母线电压给定值大于所述母线电压实际值，则控制所述储能设备进入放电状态；
若所述母线电压给定值小于或等于所述母线电压实际值，则控制所述储能设备进入充电状态。
在一些实施例中，第四控制单元具体用于：
判断子单元，用于根据所述储能充放电策略判断所述储能设备需要充电控制还是放电控制；
第三控制子单元，用于若所述储能设备需要充电控制，则控制所述储能设备的电压给定值大于所述储能设备的实际电压值，以使所述储能设备进入充电状态；
第四控制子单元，用于若所述储能设备需要放电控制，则控制所述储能设备的电压给定值小于所述储能设备的实际电压值，以使所述储能设备进入放电状态。
在一些实施例中，第三控制子单元和第四控制子单元具体用于：
对所述储能设备的电压给定值与所述储能设备的实际电压值的差值进行电压外环控制，得到电流内环控制的给定值；
对所述电流内环控制的给定值与所述储能设备的实际电流值的差值进行电流内环控制，得到第二调制波信号；
对所述第二调制波信号进行调制，得到所述储能变流单元的IGBT的开关脉冲信 号，以控制所述储能变流单元工作。
上述装置可执行本公开实施例所提供的方法，具备执行方法相应的功能模块和有益效果。未在本公开实施例中详尽描述的技术细节，可参见本公开实施例提供的方法。
本公开一些实施例提供一种电子设备(也可称为能量调度装置)，包括：至少一个处理器；以及，与所述至少一个处理器通信连接的存储器；其中，所述存储器存储有可被所述至少一个处理器执行的指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器能够实现如上述实施例所述的能量调度方法。
本公开一些实施例提供一种能量调度系统，包括：发电设备、储能设备和用电设备，所述储能设备通过储能变流单元连接至母线，电网通过网侧变流单元连接至母线，所述发电设备直接连接至所述母线。该能量调度系统还包括：控制主板，所述控制主板与所述网侧变流单元及所述储能变流单元电连接，所述控制主板包括上述实施例所述的能量调度装置。
上述实施例的能量调度系统取消发电设备的变流单元，通过储能变流单元或网侧变流单元来实现MPPT寻优功能，保障系统在没有发电设备的变流单元的情况下仍可以完成寻优处理。取消上层调度管理系统，通过控制主板直接采集母线电压、网侧电压电流和储能侧电压电流，从算法上处理，将储能变流单元和网侧变流单元统一控制，不需要给定储能的电流指令，直接根据状态计算下发储能的充放电指令，实现储能充放电模式的自动切换，能够实现储能变流单元和网侧变流单元的无通讯控制，防止通讯故障导致系统功率调度的不稳定性甚至导致系统出现异常的问题。
本公开一些实施例提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现本公开上述实施例所述的能量调度方法。
以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本公开实施例方案的目的。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到各实施方式可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件。基于这样的理解，上述技术方案本质上或者说对发明人知晓的技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如ROM/RAM、磁碟、光盘等，包括若干指令用以使得一台计算机设备(可以是个人计 算机，服务器，或者网络设备等)执行各个实施例或者实施例的某些部分所述的方法。
最后应说明的是：以上实施例仅用以说明本公开的技术方案，而非对其限制；尽管参照前述实施例对本公开进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本公开各实施例技术方案的精神和范围。

Claims (13)

  1. 一种能量调度方法，其特征在于，所述方法由控制主板执行，所述控制主板与网侧变流单元及储能变流单元电连接，所述方法包括：
    确定电网掉电情况和发电设备的使能情况；
    根据所述电网掉电情况和所述发电设备的使能情况，控制所述网侧变流单元或者所述储能变流单元进行母线电压的稳定；
    根据所述电网掉电情况和所述发电设备的使能情况，通过母线电压或储能设备的电压，控制所述储能设备的充放电。
  2. 根据权利要求1所述的方法，其特征在于，根据所述电网掉电情况和所述发电设备的使能情况，控制所述网侧变流单元或者所述储能变流单元进行母线电压的稳定，包括：
    根据所述电网掉电情况，确定执行母线电压稳定操作的单元为所述网侧变流单元或者所述储能变流单元；
    根据所述发电设备的使能情况，确定母线电压给定值；
    利用已确定的执行母线电压稳定操作的单元将母线电压稳定至所述母线电压给定值。
  3. 根据权利要求2所述的方法，其特征在于，根据所述电网掉电情况，确定执行母线电压稳定操作的单元，包括：
    若电网掉电，则确定所述储能变流单元作为执行母线电压稳定操作的单元；
    若电网未掉电，则确定所述网侧变流单元作为执行母线电压稳定操作的单元。
  4. 根据权利要求2所述的方法，其特征在于，根据所述发电设备的使能情况，确定母线电压给定值，包括：
    若发电设备使能，则控制所述已确定的执行母线电压稳定操作的单元进行MPPT寻优，并确定MPPT寻优的计算结果作为所述母线电压给定值；
    若发电设备未使能，则将预设电压值作为所述母线电压给定值。
  5. 根据权利要求2-4任意一项所述的方法，其特征在于，利用已确定的执行母线电压稳定操作的单元将母线电压稳定至所述母线电压给定值，包括：
    对母线电压给定值与母线电压实际值的差值进行电压外环控制，得到电流内环控制的给定值；
    对所述电流内环控制的给定值与实际电流值的差值进行电流内环控制，得到第一调制波信号，其中，若由网侧变流单元进行母线电压稳定，所述实际电流值为网侧实际电流值，若由储能变流单元进行母线电压稳定，所述实际电流值为储能设备的实际电流值；
    对所述第一调制波信号进行调制，得到网侧变流单元的IGBT的开关脉冲信号或者得到储能变流单元的IGBT的开关脉冲信号，以控制网侧变流单元或储能变流单元工作。
  6. 根据权利要求1-5任意一项所述的方法，其特征在于，根据所述电网掉电情况和所述发电设备的使能情况，通过母线电压或储能设备的电压，控制所述储能设备的充放电，包括：
    若电网掉电且发电设备使能，则根据母线电压给定值与母线电压实际值，控制所述储能设备进行充放电；
    若电网掉电且发电设备未使能，则根据用电设备的用电需求控制所述储能设备进行放电；
    若电网未掉电，则根据储能充放电策略控制所述储能设备的电压给定值，以控制所述储能设备进行充放电。
  7. 根据权利要求6所述的方法，其特征在于，根据母线电压给定值与母线电压实际值，控制所述储能设备进行充放电，包括：
    若所述母线电压给定值大于所述母线电压实际值，则控制所述储能设备进入放电状态；
    若所述母线电压给定值小于或等于所述母线电压实际值，则控制所述储能设备进入充电状态。
  8. 根据权利要求6所述的方法，其特征在于，根据储能充放电策略控制所述储能设备的电压给定值，以控制所述储能设备进行充放电，包括：
    根据所述储能充放电策略判断所述储能设备需要充电控制还是放电控制；
    若所述储能设备需要充电控制，则控制所述储能设备的电压给定值大于所述储能设备的实际电压值，以使所述储能设备进入充电状态；
    若所述储能设备需要放电控制，则控制所述储能设备的电压给定值小于所述储能设备的实际电压值，以使所述储能设备进入放电状态。
  9. 根据权利要求8所述的方法，其特征在于，使所述储能设备进入充电状态以 及使所述储能设备进入放电状态，包括：
    对所述储能设备的电压给定值与所述储能设备的实际电压值的差值进行电压外环控制，得到电流内环控制的给定值；
    对所述电流内环控制的给定值与所述储能设备的实际电流值的差值进行电流内环控制，得到第二调制波信号；
    对所述第二调制波信号进行调制，得到所述储能变流单元的IGBT的开关脉冲信号，以控制所述储能变流单元工作。
  10. 一种能量调度装置，其特征在于，所述装置应用于控制主板，所述控制主板与网侧变流单元及储能变流单元电连接，所述装置包括：
    确定模块，用于确定电网掉电情况和发电设备的使能情况；
    第一控制模块，用于根据所述电网掉电情况和所述发电设备的使能情况，控制所述网侧变流单元或者所述储能变流单元进行母线电压的稳定；
    第二控制模块，用于根据所述电网掉电情况和所述发电设备的使能情况，通过母线电压或储能设备的电压，控制所述储能设备的充放电。
  11. 一种能量调度装置，其特征在于，包括：
    至少一个处理器；以及
    与所述至少一个处理器通信连接的存储器，其中，所述存储器存储有指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器实现如权利要求1至9中任一项所述的能量调度方法。
  12. 一种能量调度系统，其特征在于，包括：发电设备、储能设备和用电设备，所述储能设备通过储能变流单元连接至母线，电网通过网侧变流单元连接至母线，所述系统还包括：
    控制主板，所述控制主板与所述网侧变流单元及所述储能变流单元电连接，所述控制主板包括权利要求10或11所述的能量调度装置；
    所述发电设备直接连接至所述母线。
  13. 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9中任一项所述的能量调度方法。
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