WO2020082860A1 - 光伏用电设备及其充电控制方法、装置和电路、存储介质 - Google Patents

光伏用电设备及其充电控制方法、装置和电路、存储介质 Download PDF

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Publication number
WO2020082860A1
WO2020082860A1 PCT/CN2019/100798 CN2019100798W WO2020082860A1 WO 2020082860 A1 WO2020082860 A1 WO 2020082860A1 CN 2019100798 W CN2019100798 W CN 2019100798W WO 2020082860 A1 WO2020082860 A1 WO 2020082860A1
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WO
WIPO (PCT)
Prior art keywords
relay
circuit
charging
voltage
side voltage
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Application number
PCT/CN2019/100798
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English (en)
French (fr)
Inventor
刘含
陈宁宁
张雪芬
刘克勤
Original Assignee
珠海格力电器股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Priority to US17/288,027 priority Critical patent/US12021409B2/en
Priority to AU2019368742A priority patent/AU2019368742A1/en
Priority to EP19876518.2A priority patent/EP3872958A4/en
Publication of WO2020082860A1 publication Critical patent/WO2020082860A1/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
    • H02J3/34—Arrangements for transfer of electric power between networks of substantially different frequency
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/0077—
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
    • 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

Definitions

  • the present disclosure relates to the field of photovoltaic power equipment, in particular, to a photovoltaic power equipment and its charging control method, device and circuit, and storage medium.
  • the present disclosure provides a photovoltaic power equipment and its charging control method, device and circuit, and storage medium.
  • the charging circuit is added on the side to realize the charging control of the bus capacitance.
  • a charging control circuit including a double relay circuit and a charging relay circuit, wherein: the double relay circuit is provided between a grid-side circuit and a machine-side circuit of a photovoltaic power device; the charging The relay circuit is configured to be closed when the double relay circuit is not closed to achieve gentle charging of the bus capacitance.
  • the charging relay circuit includes a charging relay and a charging resistor.
  • the charging relay circuit is connected across the two relay circuits.
  • one end of the charging relay circuit is connected to the connection point of the grid-side circuit and the dual relay circuit, and the other end of the charging relay circuit is connected to a DC bus.
  • the dual relay circuit includes a first relay, a second relay, a third relay, and a fourth relay, wherein: the first relay and the second relay are connected in series on a neutral line ; The third relay and the fourth relay are connected in series on the live line.
  • the first relay, the second relay, the third relay, and the fourth relay are four separate AC relays.
  • the dual relay circuit includes two groups of dual switch relays, wherein: the first group of dual switch relays includes the first relay and the third relay; the second group of dual switch relays includes all The second relay and the fourth relay.
  • the present disclosure further includes a first voltage detection device, a second voltage detection device, and a charging control device, wherein: the first voltage detection device is configured to detect the grid-side circuit of the photovoltaic power equipment The grid-side voltage at the connection to the double relay circuit; the second voltage detection device is configured to detect the machine-side voltage at the connection between the machine-side circuit of the photovoltaic power equipment and the double relay circuit; the charging The control device is configured to control the on-off of the charging relay circuit and the double relay circuit according to the grid-side voltage and the machine-side voltage.
  • the present disclosure further includes a first voltage detection device, a second voltage detection device, and a charging control device, wherein: the first voltage detection device is configured to detect the grid-side circuit of the photovoltaic power equipment The grid-side voltage at the connection to the double relay circuit; the second voltage detection device is configured to detect the machine-side voltage at the connection between the machine-side circuit of the photovoltaic power equipment and the double relay circuit; the charging The control device is configured to determine the type of circuit failure based on the grid-side voltage and the generator-side voltage.
  • the present disclosure further includes a first voltage detection device, a second voltage detection device, and a charging control device, wherein: the first voltage detection device is configured to detect the grid-side circuit of the photovoltaic power equipment The grid-side voltage at the connection to the double relay circuit; the second voltage detection device is configured to detect the machine-side voltage at the connection between the machine-side circuit of the photovoltaic power equipment and the double relay circuit; the charging The control device is configured to control the on-off of the charging relay circuit and the dual relay circuit according to the grid-side voltage and the machine-side voltage, and determine the circuit failure type according to the grid-side voltage and the machine-side voltage .
  • the charging control circuit further includes a third voltage detection device, wherein: the third voltage detection device is configured to detect a DC bus voltage; and the charging control device is configured to The DC bus voltage, the grid-side voltage and the machine-side voltage control the on-off of the charging relay circuit and the dual relay circuit.
  • a third voltage detection device is further included, wherein: the third voltage detection device is configured to detect a DC bus voltage; the charging control device is configured to be based on the DC bus voltage, The grid-side voltage and the machine-side voltage determine the type of circuit failure.
  • a third voltage detection device is further included, wherein: the third voltage detection device is configured to detect a DC bus voltage; the charging control device is configured to be based on the DC bus voltage, The grid-side voltage and the generator-side voltage control the on-off of the charging relay circuit and the double relay circuit, and determine the circuit failure type according to the DC bus voltage, the grid-side voltage, and the generator-side voltage.
  • a charging control method including: determining whether the double relay circuit in the charge control circuit as described in any of the above embodiments is closed; when the double relay circuit is not closed, Close the charging relay circuit to achieve gentle charging of the bus capacitance.
  • the charging control method further includes: acquiring a grid-side voltage and a machine-side voltage; controlling the charging relay circuit and the dual relay circuit according to the grid-side voltage and the machine-side voltage On and off.
  • the charging control method further includes: acquiring a grid-side voltage and a generator-side voltage; and determining a circuit failure type according to the grid-side voltage and the generator-side voltage.
  • the charging control method further includes: acquiring a grid-side voltage and a machine-side voltage; controlling the charging relay circuit and the dual relay circuit according to the grid-side voltage and the machine-side voltage On and off, and determine the type of circuit failure based on the grid-side voltage and the generator-side voltage.
  • controlling the switching of the charging relay circuit and the dual relay circuit according to the grid-side voltage and the machine-side voltage includes: acquiring a DC bus voltage; according to the DC bus voltage, The grid-side voltage and the machine-side voltage control the on-off of the charging relay circuit and the dual relay circuit.
  • determining the circuit fault type based on the grid-side voltage and the generator-side voltage includes: acquiring a DC bus voltage; based on the DC-bus voltage, the grid-side voltage, and the generator-side voltage Determine the type of circuit failure.
  • the on-off of the charging relay circuit and the double relay circuit is controlled according to the grid-side voltage and the machine-side voltage, and according to the grid-side voltage and the machine-side voltage
  • Determining the type of circuit failure includes: acquiring the DC bus voltage; controlling the switching of the charging relay circuit and the dual relay circuit according to the DC bus voltage, the grid-side voltage, and the generator-side voltage, and according to the DC The bus voltage, the grid-side voltage and the generator-side voltage determine the type of circuit failure.
  • the charging relay circuit includes a charging relay
  • determining the type of circuit failure based on the DC bus voltage, the grid-side voltage, and the generator-side voltage further includes: within a first predetermined time interval of closing the charging relay, determining the Whether the DC bus voltage meets the second condition, wherein the second condition is that the DC bus voltage is greater than a predetermined voltage; and within the first predetermined time interval when the charging relay is closed, the DC bus voltage does not satisfy the first condition In the case of two conditions, it is determined that the DC bus is short-circuited, and the information that the DC bus is short-circuited is reported to the outside.
  • determining the type of circuit failure based on the DC bus voltage, the grid-side voltage, and the generator-side voltage further includes: within the first predetermined time interval when the charging relay is closed, all When the DC bus voltage satisfies the second condition, after closing the charging relay for the first predetermined time interval, it is determined whether the DC bus voltage satisfies a third condition, where the third condition is The DC bus voltage is greater than a predetermined DC bus threshold; after a second predetermined time interval, if the DC bus voltage still does not meet the third condition, a fault in the charging circuit is determined, and the information about the fault in the charging circuit is reported to the outside .
  • the on-off of the charging relay circuit and the dual relay circuit is controlled according to the DC bus voltage, the grid-side voltage, and the machine-side voltage, and according to the DC bus voltage
  • the grid-side voltage and the generator-side voltage determining circuit failure type further include: after closing the charging relay for the first predetermined time interval, when the DC bus voltage meets the third condition, delay After the third predetermined time interval, close any three of the four relays of the dual relay circuit; after the third predetermined time interval, open the charging relay; delay the third predetermined time After the interval, determine whether the effective value of the generator-side voltage meets the fourth condition, where the fourth condition is that the effective value of the generator-side voltage is less than a predetermined value; if the delay is after a fourth predetermined time interval, the If the effective value of the machine side voltage still does not meet the fourth condition, it is determined that the relay is invalid, and the message of the relay failure fault is reported to the outside, where the relay failure fault is The unselected relay among the four relays is short-
  • the on-off of the charging relay circuit and the dual relay circuit is controlled according to the DC bus voltage, the grid-side voltage, and the machine-side voltage, and according to the DC bus voltage
  • the grid-side voltage and the generator-side voltage determining circuit failure type further include: when the effective value of the generator-side voltage meets the fourth condition, after a delay of the third predetermined time interval, disconnect Open the four relays and close the charging relay; after delaying the third predetermined time interval, determine whether the DC bus voltage meets the fifth condition, wherein the fifth condition is that the DC bus voltage continues Greater than the predetermined DC bus threshold; when the DC bus voltage does not satisfy the fifth condition, determine that the charging circuit is faulty, and report the charging circuit fault message to the outside.
  • the on-off of the charging relay circuit and the dual relay circuit is controlled according to the DC bus voltage, the grid-side voltage, and the machine-side voltage, and according to the DC bus voltage
  • the grid-side voltage and the generator-side voltage determination circuit failure type further includes: when the DC bus voltage meets the fifth condition, closing the four relays and closing the charging relay; delay After the third predetermined time interval, determine whether the effective value of the generator-side voltage meets the sixth condition, where the sixth condition is that the effective value of the generator-side voltage is within a second predetermined range; When the effective value of the generator-side voltage meets the sixth condition, it is determined that the charging control task is completed, and a message indicating that the charging control task is completed is reported to the outside; the effective value of the generator-side voltage does not satisfy the sixth Under the condition, it is determined that the relay is invalid, and a message that the relay is invalid is reported to the outside.
  • a charging control device comprising: a judging unit to judge whether the double relay circuit in the charging control circuit as described in any of the above embodiments is closed; a control unit is provided in the dual When the relay circuit is not closed, close the charging relay circuit to achieve gentle charging of the bus capacitance.
  • the charging control device is configured to perform operations to implement the charging control method as described in any of the above embodiments.
  • the charging control device is the charging control device in the charging control circuit as described in any one of the above embodiments.
  • a charging control device including: a memory configured to store instructions; a processor configured to execute the instructions so that the charging control device performs implementation as described in any of the above embodiments The operation of the charging control method.
  • a photovoltaic power device including the charging control circuit as described in any of the above embodiments.
  • a photovoltaic power device including the charging control device as described in any one of the above embodiments.
  • a photovoltaic power device including the charging control circuit as described in any one of the foregoing embodiments, and including the charging control device as described in any of the foregoing embodiments.
  • a computer-readable storage medium storing computer instructions, which when executed by a processor implements the charging control method as described in any of the above embodiments .
  • the present disclosure adds a charging relay circuit on the AC power supply side, so that when the double relays are not closed, the charging of the bus capacitance can be achieved by closing the charging relay.
  • FIG. 1 is a schematic diagram of a double relay structure of a photovoltaic grid-connected inverter of the related art of the present disclosure
  • FIG. 2 is a schematic diagram of some embodiments of the charging control circuit of the present disclosure
  • FIG. 3 is a schematic diagram of some other embodiments of the charging control circuit of the present disclosure.
  • FIG. 4 is a schematic diagram of still other embodiments of the charging control circuit of the present disclosure.
  • FIG. 5 is a schematic diagram of some embodiments of the charging control method of the present disclosure.
  • FIG. 6 is a schematic diagram of some other embodiments of the charging control method of the present disclosure.
  • FIG. 7 is a schematic diagram of still other embodiments of the charging control method of the present disclosure.
  • FIG. 8 is a schematic diagram of some embodiments of the charging control device of the present disclosure.
  • FIG. 9 is a schematic diagram of other embodiments of the charging control device of the present disclosure.
  • FIG. 2 is a schematic diagram of some embodiments of the charging control circuit of the present disclosure. As shown in FIG. 2, the above charging control circuit may include a double relay circuit and a charging relay circuit, where:
  • the double relay circuit is arranged between the grid-side circuit and the machine-side circuit of the photovoltaic power equipment.
  • the above photovoltaic power device may be a photovoltaic air conditioner.
  • the grid-side circuit may be a circuit on the AC grid side.
  • the above grid-side circuit may include a filter board and an AC power supply.
  • the above machine-side circuit may be a photovoltaic device side and a photovoltaic-side circuit.
  • the above machine-side circuit may include a reactor, an AC / DC power module, and a photovoltaic device.
  • the above double relay circuit may be provided between the filter board of the grid-side circuit and the reactor of the machine-side circuit.
  • the charging relay circuit is set to close when the double relay circuit is not closed to achieve gentle charging of the bus capacitance.
  • the above charging relay circuit may include a charging relay RLY_C and a charging resistor R.
  • the above charging relay circuit is connected across the two relay circuits.
  • FIG. 3 is a schematic diagram of some other embodiments of the charging control circuit of the present disclosure. As shown in FIG. 3, one end of the charging relay circuit is connected to the connection point of the grid-side circuit and the double relay circuit, and the other end of the charging relay circuit is connected to the DC bus through a rectifier bridge.
  • the above dual relay circuit may include a first relay RLY1, a second relay RLY2, a third relay RLY3, and a fourth relay RLY4, where:
  • the first relay RLY1 and the second relay RLY2 are connected in series on the neutral line N.
  • the third relay RLY3 and the fourth relay RLY4 are connected in series on the live line L.
  • the first relay RLY1, the second relay RLY2, the third relay RLY3, and the fourth relay RLY4 are four separate AC relays.
  • the above double relay circuit may include two sets of double switch relays as shown in FIG. 1, wherein:
  • the first dual-switch relay includes a first relay RLY1 and a third relay RLY3.
  • the second double switch relay includes a second relay RLY2 and a fourth relay RLY4.
  • the dual switch relay of the above embodiment of the present disclosure is considered to be a device, and the dual switch relay can close and open two relays at the same time with one signal.
  • RLY1 and RLY3 are a group
  • RLY2 and RLY4 are a group.
  • the above embodiments of the present disclosure can control two sets of relays with two control signals.
  • the above charging control circuit may further include a first voltage detection device 1 and a second voltage detection device 2, wherein:
  • FIG. 4 is a schematic diagram of still other embodiments of the charging control circuit of the present disclosure. As shown in FIG. 4, the charging control circuit of the embodiments of FIGS. 2 and 3 may further include a charging control device 4, wherein:
  • the first voltage detection device 1 and the second voltage detection device 2 are respectively connected to the charging control device 4.
  • the charging control device 4 is also connected to a charging relay RLY_C, a first relay RLY1, a second relay RLY2, a third relay RLY3, and a fourth relay RLY4, respectively.
  • the first voltage detection device 1 is configured to detect the grid-side voltage V1 at the connection between the grid-side circuit of the photovoltaic power equipment and the double relay circuit.
  • the second voltage detection device 2 is configured to detect the machine-side voltage V2 at the connection between the machine-side circuit of the photovoltaic power equipment and the double relay circuit.
  • the charging control device 4 is configured to control the turning on and off of the charging relay RLY_C, the first relay RLY1, the second relay RLY2, the third relay RLY3, and the fourth relay RLY4 according to the grid-side voltage and the machine-side voltage; and / or according to the grid side
  • the voltage and the voltage on the generator side determine the type of circuit failure.
  • the charging control device 4 may be configured to determine whether the dual relay circuit in the charging control circuit as described in any of the above embodiments is closed; and when the dual relay circuit is not closed, close the charging relay Circuit to achieve gentle charging of bus capacitance.
  • the above charging control circuit may further include a third voltage detection device 3, wherein:
  • the third voltage detection device 3 is configured to detect the DC bus voltage Vdc.
  • the third voltage detection device 3 is provided with a DC side of DC / AC.
  • a DC-DC converter and a DC between the third voltage detection device 3 and the photovoltaic cell.
  • Contactor and filter board Even in the system without photovoltaic DC, there is a DC contactor and filter plate between the third voltage detection device 3 and the photovoltaic cell. Only when the contactor is closed, the third voltage detection device 3 and the photovoltaic cell are a potential point.
  • the charging control device 4 is configured to control the on and off of the charging relay RLY_C, the first relay RLY1, the second relay RLY2, the third relay RLY3 and the fourth relay RLY4 according to the DC bus voltage, the grid-side voltage and the machine-side voltage; and / or To determine the type of circuit failure based on the DC bus voltage, grid-side voltage and generator-side voltage.
  • the charging control circuit provided by the above embodiment of the present disclosure, by adding a charging loop on the side of the AC power supply, the charging control of the bus capacitance can be achieved thereby.
  • the AC side charging relay (RLY_C) and the charging resistor are connected across the dual relay. When the dual relay is not closed, the charging of the bus capacitance can be achieved by closing the charging relay.
  • the above-mentioned embodiments of the present disclosure also realize the detection of adhesion and open circuit of the AC relay and the suppression of the impact of the filter capacitor.
  • the above charging control circuit may further include a filter capacitor C, where:
  • the filter capacitor C is provided between the second voltage detection device 2 and the reactor.
  • the filter capacitor has no charge until the first charge (close the charging relay to charge the bus capacitor), because this charging process is connected to the charging relay through the charging resistor
  • the charging resistance is limited to about current, so the above embodiments of the present disclosure can suppress the impact of the filter capacitor C.
  • the circuit structure of FIG. 3 cannot achieve this suppression effect.
  • the charging control device 4 can implement fault detection such as adhesion and open circuit detection of the AC relay and suppression of the impact of the filter capacitor by performing the charging control method of the present disclosure.
  • FIG. 5 is a schematic diagram of some embodiments of the charging control method of the present disclosure. Preferably, this embodiment can be executed by the disclosed charging control device or the disclosed charging control circuit. The method includes the following steps:
  • Step 51 Determine whether the double relay circuit in the charging control circuit as described in any of the above embodiments is closed.
  • Step 52 when the double relay circuit is not closed, the charging relay circuit is closed to achieve gentle charging of the bus capacitance.
  • the filter capacitor has no charge until the first charge (close the charging relay to charge the bus capacitor), because this charging process is connected to the charging relay through the charging resistor
  • the charging resistance is limited to about current, so the above embodiments of the present disclosure can suppress the impact of the filter capacitor C.
  • the circuit structure of FIG. 3 cannot achieve this suppression effect.
  • the charging control of the bus capacitance can be achieved thereby.
  • the AC side charging relay (RLY_C) and the charging resistor are connected across the dual relay. When the dual relay is not closed, the charging of the bus capacitance can be achieved by closing the charging relay.
  • FIG. 6 is a schematic diagram of other embodiments of the charging control method of the present disclosure.
  • this embodiment can be executed by the disclosed charging control device or the disclosed charging control circuit.
  • the method includes the following steps:
  • Step 61 Obtain the grid-side voltage and the generator-side voltage.
  • Step 62 Control the on-off of the charging relay circuit and the double relay circuit according to the grid-side voltage and the generator-side voltage, and / or determine the circuit failure type according to the grid-side voltage and the generator-side voltage.
  • step 62 may include:
  • Step 621 Obtain the DC bus voltage Vdc.
  • Step 622 controlling the on-off of the charging relay circuit and the double relay circuit according to the DC bus voltage, the grid-side voltage and the generator-side voltage, and / or, determining the circuit failure type according to the DC bus voltage, grid-side voltage and generator-side voltage and outward Broadcast.
  • the above-mentioned circuit failure types may include sticking, open circuit of the AC relay, and short circuit of the DC bus.
  • shock suppression of the AC filter capacitor can also be achieved.
  • the above embodiments of the present disclosure provide a charging and dual relay circuit using photovoltaic power equipment, which can achieve the effects of adhesion, open circuit, short circuit of a DC bus, impact suppression of an AC filter capacitor, etc. of an AC relay.
  • FIG. 7 is a schematic diagram of still other embodiments of the charging control method of the present disclosure.
  • this embodiment can be executed by the disclosed charging control device or the disclosed charging control circuit.
  • the charging loop control of the above embodiment of the present disclosure actually charges the DC bus capacitor through a resistor, then closes the first relay RLY1-fourth relay RLY4, and finally bypasses the control process of the charging resistor. Among them, the failure of the first relay RLY1-fourth relay RLY4 needs to be detected.
  • the charging circuit control and relay failure detection method of the embodiment of FIG. 7 may include the following steps:
  • Step 1 Enter the charging loop control and relay failure detection tasks.
  • Step 2 After entering the task, determine whether the effective value of the grid-side voltage and the generator-side voltage satisfy the first condition, where the first condition is that the effective value of the grid-side voltage V1 is within the first predetermined range, and the machine-side voltage The effective value of V2 is less than the predetermined value. If the effective value of the grid-side voltage and the generator-side voltage meet the first condition, go to step 3; otherwise, if the effective value of the grid-side voltage and the generator-side voltage do not satisfy the first condition Without charging logic control, step 18 is executed, that is, the relay failure is determined, and the relay failure failure message is reported to the outside. In this case, the relay failure failure is that all of the first relay RLY1 to the fourth relay RLY4 are short-circuited.
  • the above-mentioned first predetermined range is 10V-280V.
  • the above predetermined value is 50V.
  • Step 3 Close the charging relay RLY_C to start charging the bus capacitor.
  • the filter capacitor has no charge to the first charge (close the charging relay to charge the bus capacitor), because of this
  • the charging process is realized by connecting the charging resistor and the charging relay to the power grid, and the charging resistor has a limited current, so the above embodiments of the present disclosure can suppress the impact of the filter capacitor C.
  • the circuit structure of FIG. 3 cannot achieve this suppression effect.
  • Step 4 Within the first predetermined time interval t1 of closing the charging relay, it is determined whether the DC bus voltage meets the second condition, wherein the second condition is that the DC bus voltage is greater than the predetermined voltage.
  • step 19 is executed, that is, the DC bus is short-circuited, and the DC bus short-circuit information is reported to the outside; otherwise, the charging is closed If the DC bus voltage meets the second condition within the first predetermined time interval t1 of the relay, step 5 is performed.
  • the first predetermined time interval t1 may be equal to twice the predetermined interval t.
  • the selectable range of the predetermined interval t is tmin-tmax, where the minimum value tmin depends on the stable time after the relay operates, and the maximum value tmax is affected by the heating of the charging resistance.
  • the selectable range of the predetermined interval t is 0.3-1s.
  • the predetermined interval t may be 0.5s.
  • the predetermined voltage may be 25V.
  • Step 5 After closing the charging relay for two predetermined time intervals and a first predetermined time interval t1, it is determined whether the DC bus voltage meets the third condition, where the third condition is that the DC bus voltage is greater than the predetermined DC bus threshold. After closing the charging relay for 2 predetermined time intervals after the first predetermined time interval t1 and the DC bus voltage meets the third condition, step 6 is performed; otherwise, after a delay of 12 predetermined time intervals and the second predetermined time interval t2, If the DC bus voltage still does not satisfy the third condition, step 20 is performed, that is, the charging circuit is determined to be faulty, and the charging circuit fault information is reported to the outside.
  • the third condition is that the DC bus voltage is greater than the predetermined DC bus threshold.
  • the second predetermined time interval t2 may be equal to 12 times the predetermined interval t.
  • the predetermined DC bus threshold may be Vph * 1.414 * 0.8.
  • Step 6 after delaying the third predetermined time interval t3, close any three of the four relays of the double relay circuit (for example, the first relay RLY1, the second relay RLY2, the second relay RLY3); then delay the third predetermined After the time interval t3, the charging relay RLY_C is turned off.
  • the third predetermined time interval t3 may be equal to 12 times the predetermined interval t.
  • Step 7 After delaying the third predetermined time interval t3, it is determined whether the effective value V2 of the generator-side voltage satisfies the fourth condition, where the fourth condition is that the effective value of the generator-side voltage V2 is less than the predetermined value.
  • step 18 is performed, that is, the relay is judged to be invalid, and a message indicating that the relay fails is reported to the outside, which is the case Next, the relay failure fault is short circuit of the unselected fourth relay RLY4 among the four relays.
  • the fourth predetermined time interval t4 may be equal to 5 times the predetermined interval t.
  • step 8 is executed.
  • Step 8 after delaying the second predetermined time interval t2, the first relay RLY1-fourth relay RLY4 is opened, and the charging relay RLY_C is closed; after the second predetermined time interval t2, the first relay RLY1, the second relay RLY2 are closed 4.
  • Step 9 After delaying the second predetermined time interval t2, it is judged whether the effective value V2 of the generator-side voltage meets the fourth condition, wherein the fourth condition is that the effective value of the generator-side voltage V2 is less than the predetermined value.
  • step 18 is performed, that is, the relay is judged to be invalid, and a message indicating that the relay fails is reported to the outside, which is the case Next, the relay failure fault is short circuit of the unselected third relay RLY3 among the four relays.
  • step 10 is executed.
  • Step 10 After the second predetermined time interval t2 is delayed, the first relay RLY1-the fourth relay RLY4 is opened, and the charging relay RLY_C is closed; after the second predetermined time interval t2, the first relay RLY1, the third relay RLY3 are closed 4. The fourth relay RLY4, after a second delay time t2, the charging relay RLY_C is turned off.
  • Step 11 after delaying the second predetermined time interval t2, it is determined whether the effective value V2 of the generator-side voltage meets the fourth condition, where the fourth condition is that the effective value of the generator-side voltage V2 is less than the predetermined value.
  • step 18 is performed, that is, the relay is judged to be invalid, and the relay failure message is reported to the outside, which Next, the relay failure fault is a short circuit of the unselected second relay RLY2 among the four relays.
  • step 12 is executed.
  • Step 12 after the second predetermined time interval t2 is delayed, the first relay RLY1 to the fourth relay RLY4 are opened, and the charging relay RLY_C is closed; after the second predetermined time interval t2, the second relay RLY2 and the third relay RLY3 are closed 4.
  • Step 13 After delaying the second predetermined time interval t2, it is determined whether the effective value V2 of the generator-side voltage meets the fourth condition, where the fourth condition is that the effective value of the generator-side voltage V2 is less than the predetermined value.
  • step 18 is performed, that is, the relay is judged to be invalid, and a message indicating that the relay fails is reported to the outside, which is the case
  • the relay failure fault is a short circuit of the unselected first relay RLY1 among the four relays.
  • step 14 is executed.
  • the machine-side voltage V2 is actually a DC quantity (random, according to Disconnect the phase of the AC voltage), and the value determined as the V2 voltage is the effective value minus this DC component.
  • Step 14 After delaying the second predetermined time interval t2, it is determined whether the DC bus voltage meets the fifth condition, where the fifth condition is that the DC bus voltage continues to be greater than the predetermined DC bus threshold (Vph * 1.414 * 0.7). In the case that the DC bus voltage does not satisfy the fifth condition, step 20 is executed, that is, the charging circuit is determined to be faulty, and a message of the charging circuit is reported to the outside. Otherwise, if the DC bus voltage meets the fifth condition, step 15 is performed.
  • the fifth condition is that the DC bus voltage continues to be greater than the predetermined DC bus threshold (Vph * 1.414 * 0.7).
  • step 20 is executed, that is, the charging circuit is determined to be faulty, and a message of the charging circuit is reported to the outside. Otherwise, if the DC bus voltage meets the fifth condition, step 15 is performed.
  • Step 15 Close the first relay RLY1-the fourth relay RLY4, and close the charging relay RLY_C.
  • step 15 although the first relay RLY1-fourth relay RLY4 is closed and the charging relay is open; if one of the relays is open, it will inevitably cause V1 and V2 to be fully connected, that is, measure V2
  • the effective value of the voltage is not within the normal range (in theory, the effective value of the V2 voltage minus the average value should be 0).
  • the above embodiment of the present disclosure can detect that the first relay RLY1 and the fourth relay RLY4 have open circuit failures in the above manner.
  • Step 16 after delaying the second predetermined time interval t2, determine whether the effective value of the generator-side voltage meets the sixth condition, wherein the sixth condition is that the effective value of the generator-side voltage is in the second predetermined range (for example, 160-280V) Inside. If the effective value of the generator-side voltage meets the sixth condition, go to step 17; otherwise, if the effective value of the generator-side voltage does not meet the sixth condition, go to step 18, that is, if the relay fails, it is reported The relay failure message is displayed.
  • the sixth condition is that the effective value of the generator-side voltage is in the second predetermined range (for example, 160-280V) Inside. If the effective value of the generator-side voltage meets the sixth condition, go to step 17; otherwise, if the effective value of the generator-side voltage does not meet the sixth condition, go to step 18, that is, if the relay fails, it is reported The relay failure message is displayed.
  • the second relay RLY2 and the fourth relay RLY4 are controlled from the chip, and before detecting whether the V2 voltage is in the second predetermined range (eg, 160-280V), the relay status fed back from the chip is checked SPI) judges that the second relay RLY2 and the fourth relay RLY4 are closed and opened as required, and if the requirements are not met, a charging circuit failure is reported.
  • the second predetermined range eg, 160-280V
  • Step 17 when the effective value of the generator-side voltage satisfies the sixth condition, it is determined that the charging control task is completed, and a message that the charging control task is completed is reported to the outside.
  • step 18 it is determined that the relay has failed, and a message indicating that the relay has failed is reported to the outside.
  • Step 19 Determine the short circuit of the DC bus and report the fault information of the short circuit of the DC bus to the outside.
  • Step 20 Determine the charging circuit failure, and report the charging circuit failure information to the outside.
  • the charging circuit failure is reported through steps 5 and 14 and the main criterion is to determine whether the bus voltage reaches the predetermined DC bus threshold (Vph * 1.414 * 0.7), because the bus is short-circuited Excessive load and failure of multiple relays open circuit will cause charging failure.
  • the above-mentioned embodiments of the present disclosure provide a charging control and relay failure detection circuit and method for single-phase photovoltaic power equipment, which can realize the adhesion suppression, open circuit, DC bus short circuit, and shock suppression of the AC filter capacitor of the AC relay (the charging relay is closed After that, the AC filter capacitor charging is achieved through the charging resistor current limit).
  • the charging control method of the above embodiments of the present disclosure (for example, any of the embodiments of FIGS. 5-6) can be implemented by the charging control circuit of the embodiment of FIG. 2.
  • the charging control method of the above-mentioned embodiments of the present disclosure can be implemented by the charging control circuit of the embodiment of FIG. 3 except for the step of suppressing the impact on the filter capacitor.
  • the charge control circuit of the embodiment of FIG. 3 also simplifies the calculation of the effective value of the V2 voltage (V2 does not need to subtract the average value).
  • the above-mentioned embodiments of the present disclosure can realize a charging and relay detection circuit applied to photovoltaic power equipment (integrated power generation and power equipment), and on the basis of this circuit, the certification requires a single detection of the relay.
  • the above embodiments of the present disclosure can meet the relay failure detection requirements of the relevant photovoltaic standards, and avoid the impact on the filter capacitor.
  • the charging loop control of the above embodiment of the present disclosure actually charges the DC bus capacitor through a resistor, then closes the first relay RLY1-fourth relay RLY4, and finally bypasses the control process of the charging resistor. Among them, the failure of the first relay RLY1-fourth relay RLY4 needs to be detected.
  • the charging control device of the above embodiment of the present disclosure may include a judgment unit 41 and a control unit 42, where:
  • the judging unit 41 judges whether the double relay circuit in the charging control circuit as described in any of the above embodiments is closed.
  • the control unit 42 is configured to close the charging relay circuit when the double relay circuit is not closed, so as to realize gentle charging of the bus capacitance.
  • the above-mentioned charging control device 4 is configured to perform an operation to implement the above-described charging control method as in any of the above embodiments (eg, any of FIGS. 5-7).
  • the charging control of the bus capacitance can be achieved thereby.
  • the AC side charging relay (RLY_C) and the charging resistor are connected across the dual relay. When the dual relay is not closed, the charging of the bus capacitance can be achieved by closing the charging relay.
  • the charging control device of the above embodiment of the present disclosure may include a memory 48 and a processor 49, where:
  • the memory 48 is configured to store instructions.
  • the processor 49 is configured to execute the above-mentioned instructions, so that the above-mentioned charging control device 4 executes the operation for implementing the above-mentioned charging control method according to any of the above embodiments (for example, any of FIG. 5 to FIG. 7).
  • the above-mentioned embodiments of the present disclosure can achieve the effects of adhesion, open circuit, short circuit of the DC bus, and shock suppression of the AC filter capacitor.
  • the above-mentioned embodiments of the present disclosure can realize a charging and relay detection circuit applied to photovoltaic power equipment (integrated power generation and power equipment), and on the basis of this circuit, the certification requires a single detection of the relay.
  • the charging loop control of the above embodiment of the present disclosure actually charges the DC bus capacitor through a resistor, then closes the first relay RLY1-fourth relay RLY4, and finally bypasses the control process of the charging resistor. Among them, the failure of the first relay RLY1-fourth relay RLY4 needs to be detected.
  • a photovoltaic power device including the charging control circuit as described in any one of the above embodiments, and / or including the charging control device 4 as described in any one of the above embodiments.
  • the above photovoltaic power device may be a photovoltaic air conditioner.
  • the bus capacitors can be smoothly charged by closing the charging relays.
  • the above-mentioned embodiments of the present disclosure can achieve the effects of adhesion, open circuit, short circuit of the DC bus, and shock suppression of the AC filter capacitor.
  • the above-mentioned embodiments of the present disclosure can realize a charging and relay detection circuit that should be set as a photovoltaic power device (integrated power generation and use device), and on the basis of this circuit, the certification requirement for a single detection of the relay is realized.
  • the charging loop control of the above embodiment of the present disclosure actually charges the DC bus capacitor through a resistor, then closes the first relay RLY1-fourth relay RLY4, and finally bypasses the control process of the charging resistor. Among them, the failure of the first relay RLY1-fourth relay RLY4 needs to be detected.
  • a computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the charging control method as described in any of the foregoing embodiments is implemented.
  • the bus capacitors can be smoothly charged by closing the charging relay.
  • the above-mentioned embodiments of the present disclosure can achieve the effects of adhesion, open circuit, short circuit of the DC bus, and shock suppression of the AC filter capacitor.
  • the above-mentioned embodiments of the present disclosure can realize a charging and relay detection circuit that should be set as a photovoltaic power device (integrated power generation and use device), and on the basis of this circuit, the certification requirement for a single detection of the relay is realized.
  • the charging loop control of the above embodiment of the present disclosure actually charges the DC bus capacitor through a resistor, then closes the first relay RLY1-fourth relay RLY4, and finally bypasses the control process of the charging resistor. Among them, the failure of the first relay RLY1-fourth relay RLY4 needs to be detected.
  • the above-mentioned program may be stored in a computer-readable storage medium.
  • the received storage medium may be a read-only memory, a magnetic disk, or an optical disk.

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Abstract

一种光伏用电设备及其充电控制方法、装置和电路、存储介质。该充电控制电路包括：双继电器电路和充电继电器电路，其中，双继电器电路设置在光伏用电设备的网侧电路和机侧电路之间；充电继电器电路，设置为在双继电器电路未闭合的情况下，闭合以实现对母线电容的平缓充电。通过在交流电源侧增加充电继电器电路，由此在双继电器未闭合时，可以通过闭合充电继电器实现对母线电容的平缓充电。

Description

光伏用电设备及其充电控制方法、装置和电路、存储介质
本公开以2018年10月24日递交的、申请号为201811240912.0且名称为“光伏用电设备及其充电控制方法、装置和电路、存储介质”的专利文件为优先权文件，其全部内容通过引用结合在本公开中。
技术领域
本公开涉及光伏用电设备领域，具体而言，涉及一种光伏用电设备及其充电控制方法、装置和电路、存储介质。
背景技术
对于光伏并网的AC-DC变换器，在光伏与交流电网之间，安规要求其间应有电气隔离，因此之间存在交流继电器，加之IEC62109-2(光伏发电系统用电力转换设备的安全：逆变器部分要求)对继电器冗余结构的要求，一般符合认证要求的光伏变换器都双继电器结构。
在双继电器结构中，存在两个问题，一是无法解决直流母线电容充电，二是无法满足IEC认证对继电器单一故障的失效检测。
相关技术在光伏并网逆变器的应用中，提供了一种在精准地检测每一继电器是否失效的同时，同时对逆变器输出电容电压进行了处理，消除了逆变器并网瞬间电网对滤波电容造成电流冲击的可能。如图1所示，相关技术通过1点的电网电压检测和2点逆变电压检测，结合一定的继电器动作策略实现上述效果。需要注意的是，在光伏并网逆变器中，母线电容的充电是依靠光伏组件实现的。如果没有光伏，那么直流侧不带电，控制回路也没有得电，即便交流有电，继电器也不会动作。
区别于光伏逆变器这类纯发电设备，光伏空调作为发用电一体设备，不仅要实现光伏富足时的光伏并网逆变，更重要的是在交流正常供电情况下保证空调外机的正常运行。在这种用电优先的设计理念基础上，要求即便没有光伏的时候，空调外机也要正常运行，因此无法采用光伏逆变器的方式(由光伏组件)为直流母线电容充电。
发明内容
鉴于相关技术光伏用电设备电路中交流电源侧电路无法实现对母线电路充电控制的技术问题，本公开提供了一种光伏用电设备及其充电控制方法、装置和电路、存储介质，在交流电源侧增加充电回路以实现对母线电容的充电控制。
根据本公开的一个方面，提供一种充电控制电路，包括双继电器电路和充电继电器电路，其中：所述双继电器电路设置在光伏用电设备的网侧电路和机侧电路之间；所述充电继电器电路，设置为在所述双继电器电路未闭合的情况下，闭合以实现对母线电容的平缓充电。
在本公开的一些实施例中，所述充电继电器电路包括充电继电器和充电电阻。
在本公开的一些实施例中，所述充电继电器电路跨接在所述双继电器电路的两端。
在本公开的一些实施例中，所述充电继电器电路的一端与所述网侧电路与所述双继电器电路的连接点相连，所述充电继电器电路的另一端与直流母线连接。
在本公开的一些实施例中，所述双继电器电路包括第一继电器、第二继电器、第三继电器和第四继电器，其中：所述第一继电器和所述第二继电器串联连接在零线上；所述第三继电器和所述第四继电器串联连接在火线上。
在本公开的一些实施例中，所述第一继电器、所述第二继电器、所述第三继电器和所述第四继电器为四个单独的交流继电器。
在本公开的一些实施例中，所述双继电器电路包括两组双开关继电器，其中：第一组双开关继电器包括所述第一继电器和所述第三继电器；第二组双开关继电器包括所述第二继电器和所述第四继电器。
在本公开的一些实施例中，还包括第一电压检测装置、第二电压检测装置和充电控制装置，其中：所述第一电压检测装置，设置为所述检测光伏用电设备的网侧电路与所述双继电器电路连接处的网侧电压；所述第二电压检测装置，设置为检测所述光伏用电设备的机侧电路与所述双继电器电路连接处的机侧电压；所述充电控制装置，设置为根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断。
在本公开的一些实施例中，还包括第一电压检测装置、第二电压检测装置和充电控制装置，其中：所述第一电压检测装置，设置为所述检测光伏用电设备的网侧电路与所述双继电器电路连接处的网侧电压；所述第二电压检测装置，设置为检测所述光伏用电设备的机侧电路与所述双继电器电路连接处的机侧电压；所述充电控制装置，设置为根据所述网侧电压和所述机侧电压确定电路故障类型。
在本公开的一些实施例中，还包括第一电压检测装置、第二电压检测装置和充电控制装置，其中：所述第一电压检测装置，设置为所述检测光伏用电设备的网侧电路与所述双继电器电路连接处的网侧电压；所述第二电压检测装置，设置为检测所述光伏用电设备的机侧电路与所述双继电器电路连接处的机侧电压；所述充电控制装置，设置为根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述网侧电压和所述机侧电压确定电路故障类型。
在本公开的一些实施例中，所述充电控制电路还包括第三电压检测装置，其中：所述第三电压检测装置，设置为检测直流母线电压；所述充电控制装置，设置为根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断。
在本公开的一些实施例中，还包括第三电压检测装置，其中：所述第三电压检测装置，设置为检测直流母线电压；所述充电控制装置，设置为根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型。
在本公开的一些实施例中，还包括第三电压检测装置，其中：所述第三电压检测装置，设置为检测直流母线电压；所述充电控制装置，设置为根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型。
根据本公开的另一方面，提供一种充电控制方法，包括：判断如上述任一实施例所述的充电控制电路中的双继电器电路是否闭合；在所述双继电器电路未闭合的情况下，闭合充电继电器电路，以实现对母线电容的平缓充电。
在本公开的一些实施例中，所述充电控制方法还包括：获取网侧电压和机侧电压；根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断。
在本公开的一些实施例中，所述充电控制方法还包括：获取网侧电压和机侧电压；根据所述网侧电压和所述机侧电压确定电路故障类型。
在本公开的一些实施例中，所述充电控制方法还包括：获取网侧电压和机侧电压；根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述网侧电压和所述机侧电压确定电路故障类型。
在本公开的一些实施例中，根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断包括：获取直流母线电压；根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断。
在本公开的一些实施例中，根据所述网侧电压和所述机侧电压确定电路故障类型包括：获取直流母线电压；根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型。
在本公开的一些实施例中，根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述网侧电压和所述机侧电压确定电路故障类型包括：获取直流母线电压；根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型。
在本公开的一些实施例中，所述充电继电器电路包括充电继电器，根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型包括：判断所述网侧电压的有效值和所述机侧电压的有效值是否满足第一条件，其中，所述第一条件为所述网侧电压的有效值处于第一预定范围内，且所述机侧电压的有效值小于预定值；在所述网侧电压的有效值和所述机侧电压的有效值满足所述第一条件的情况下，闭合所述充电继电器；在所述网侧电压的有效值和所述机侧电压的有效值不满足所述第一条件的情况下，判定继电器失效，向外报出继电器失效故障的消息，其中，所述继电器失效故障为所述双继电器电路的第一继电器至第四继电器全部短路。
在本公开的一些实施例中，根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型还包括：在闭合所述充电继电器第一预定时间间隔内，判断所述直流母线电压是否满足第二条件，其中所述第二条件为所述直流母线电压大于预定电压；在闭合所述充电继电器所述第一预定时间间隔内，所述直流母线电压不满足所述第二条件的情况下，判定所述直流母线短路，向外报出所述直流母线短路的信息。
在本公开的一些实施例中，根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型还包括：在闭合所述充电继电器所述第一预定时间间隔内，所述直流母线电压满足所述第二条件的情况下，在闭合所述充电继电器所述第一预定时间间隔后，判断所述直流母线电压是否满足第三条件，其中，所述第三条件为所述直流母线电压大于预定直流母线阈值；在第二预定时间间隔后，若所述直流母线电压仍然不满足所述第三条件，则判定充电回路故障，向外报出所述充电回路故障的信息。
在本公开的一些实施例中，根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型还包括：在闭合所述充电继电器所述第一预定时间间隔后，所述直流母线电压满足所述第三条件的情况下，延时第三预定时间间隔后，闭合所述双继电器电路的四个继电器中的任意三个；延时所述第三预定时间间隔后，断开所述充电继电器； 延时所述第三预定时间间隔后，判断所述机侧电压的有效值是否满足第四条件，其中，所述第四条件为所述机侧电压的有效值小于预定值；若延时第四预定时间间隔后，所述机侧电压的有效值仍不满足所述第四条件，则判定继电器失效，向外报出所述继电器失效故障的消息，其中，所述继电器失效故障为四个所述继电器中未选择的所述继电器短路。
在本公开的一些实施例中，所述根据直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型还包括：在所述机侧电压的有效值满足所述第四条件的情况下，延时所述第三预定时间间隔后，断开四个所述继电器，闭合所述充电继电器；延时所述第三预定时间间隔后，判断所述直流母线电压是否满足第五条件，其中，所述第五条件为所述直流母线电压继续大于所述预定直流母线阈值；在所述直流母线电压不满足所述第五条件的情况下，判定所述充电回路故障，向外报出所述充电回路故障的消息。
在本公开的一些实施例中，根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型还包括：在所述直流母线电压满足所述第五条件的情况下，闭合四个所述继电器，闭合所述充电继电器；延时所述第三预定时间间隔后，判断所述机侧电压的有效值是否满足第六条件，其中，所述第六条件为所述机侧电压的有效值处于第二预定范围内；在所述机侧电压的有效值满足所述第六条件的情况下，判定充电控制任务完成，向外报出所述充电控制任务完成的消息；在所述机侧电压的有效值不满足所述第六条件的情况下，判定所述继电器失效，向外报出所述继电器失效的消息。
根据本公开的另一方面，提供一种充电控制装置，包括：判断单元，判断如上述任一实施例所述的充电控制电路中的双继电器电路是否闭合；控制单元，设置为在所述双继电器电路未闭合的情况下，闭合充电继电器电路，以实现对母线电容的平缓充电。
在本公开的一些实施例中，所述充电控制装置设置为执行实现如上述任一实施例所述的充电控制方法的操作。
在本公开的一些实施例中，所述充电控制装置为如上述任一实施例所述的充电控制电路中的充电控制装置。
根据本公开的另一方面，提供一种充电控制装置，包括：存储器，设置为存储指令；处理器，设置为执行所述指令，使得所述充电控制装置执行实现如上述任一实施例所述的充电控制方法的操作。
根据本公开的另一方面，提供一种光伏用电设备，包括如上述任一实施例所述的充电控制电路。
根据本公开的另一方面，提供一种光伏用电设备，包括如上述任一实施例所述的充电控制装置。
根据本公开的另一方面，提供一种光伏用电设备，包括如上述任一实施例所述的充电控制电路，且包括如上述任一实施例所述的充电控制装置。
根据本公开的另一方面，提供一种计算机可读存储介质，所述计算机可读存储介质存储有计算机指令，所述指令被处理器执行时实现如上述任一实施例所述的充电控制方法。
本公开通过在交流电源侧增加充电继电器电路，由此在双继电器未闭合时，可以通过闭合充电继电器实现对母线电容的平缓充电。
附图说明
构成本公开的一部分的说明书附图用来提供对本公开的进一步理解，本公开的示意性实施例及其说明设置为解释本公开，并不构成对本公开的不当限定。在附图中：
图1为本公开相关技术光伏并网逆变器双继电器结构的示意图；
图2为本公开充电控制电路一些实施例的示意图；
图3为本公开充电控制电路另一些实施例的示意图；
图4为本公开充电控制电路又一些实施例的示意图；
图5为本公开充电控制方法一些实施例的示意图；
图6为本公开充电控制方法另一些实施例的示意图；
图7为本公开充电控制方法又一些实施例的示意图；
图8为本公开充电控制装置一些实施例的示意图；以及
图9为本公开充电控制装置另一些实施例的示意图。
具体实施方式
需要说明的是，在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本公开。
为了使本技术领域的人员更好地理解本公开方案，下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分的实施例，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他实施例，都应当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上述附图中的术语“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。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
应该理解的是，当元件(诸如层、膜、区域、或衬底)描述为在另一元件“上”时，该元件可直接在该另一元件上，或者也可存在中间元件。而且，在说明书以及权利要求书中，当描述有元件“连接”至另一元件时，该元件可“直接连接”至该另一元件，或者通过第三元件“连接”至该另一元件。
图2为本公开充电控制电路一些实施例的示意图。如图2所示，上述充电控制电路可以包括双继电器电路和充电继电器电路，其中：
双继电器电路设置在光伏用电设备的网侧电路和机侧电路之间。
在本公开的一些实施例中，上述光伏用电设备可以为光伏空调。
在本公开的一些实施例中，上述网侧电路可以为交流电网侧的电路。
在本公开的一些实施例中，如图2所示，上述网侧电路可以包括滤波板和交流电源。
在本公开的一些实施例中，上述机侧电路可以为光伏用电设备侧和光伏侧电路。
在本公开的一些实施例中，如图2所示，上述机侧电路可以包括电抗器、AC/DC功率模块和光伏设备。
在本公开的一些实施例中，如图2所示，上述双继电器电路可以设置在网侧电路的滤波板和机侧电路的电抗器之间。
充电继电器电路，设置为在双继电器电路未闭合的情况下，闭合以实现对母线电容的平缓充电。
在本公开的一些实施例中，如图2所示，上述充电继电器电路可以包括充电继电器RLY_C和充电电阻R。
在本公开的一些实施例中，如图2所示，上述充电继电器电路跨接在双继电器电路的两端。
图3为本公开充电控制电路另一些实施例的示意图。如图3所示，上述充电继电器电路的一端与网侧电路与双继电器电路的连接点相连，上述充电继电器电路的另一端通过整流桥与直流母线连接。
在本公开的一些实施例中，如图2和图3所示，上述双继电器电路可以包括第一继电器RLY1、第二继电器RLY2、第三继电器RLY3和第四继电器RLY4，其中：
第一继电器RLY1和第二继电器RLY2串联连接在零线N上。
第三继电器RLY3和第四继电器RLY4串联连接在火线L上。
在本公开的一些实施例中，上述第一继电器RLY1、第二继电器RLY2、第三继电器RLY3和第四继电器RLY4为四个单独的交流继电器。
在本公开的另一些实施例中，上述双继电器电路可以包括如图1所示的两组双开关继电器，其中：
第一双开关继电器包括第一继电器RLY1和第三继电器RLY3。
第二双开关继电器包括第二继电器RLY2和第四继电器RLY4。
本公开上述实施例的双开关继电器被认为是一个器件，双开关继电器可以通过一个信号，同时对两个继电器进行闭合和断开。例如RLY1和RLY3为一组，RLY2和RLY4为一组。本公开上述实施例可以用两个控制信号来控制两组继电器。
在本公开的一些实施例中，如图2和图3所示，上述充电控制电路还可以包括第一电压检测装置1和第二电压检测装置2，其中：
图4为本公开充电控制电路又一些实施例的示意图。如图4所示，图2和图3实施例的充电控制电路还可以包括充电控制装置4，其中：
第一电压检测装置1和第二电压检测装置2分别与充电控制装置4连接。
充电控制装置4还分别与充电继电器RLY_C、第一继电器RLY1、第二继电器RLY2、第三继电器RLY3和第四继电器RLY4连接。
第一电压检测装置1，设置为检测光伏用电设备的网侧电路与双继电器电路连接处的网侧电压V1。
第二电压检测装置2，设置为检测光伏用电设备的机侧电路与双继电器电路连接处的机侧电压V2。
充电控制装置4，设置为根据网侧电压和机侧电压控制充电继电器RLY_C、第一继电器RLY1、第二继电器RLY2、第三继电器RLY3和第四继电器RLY4的通断；和/或，根据网侧电压和机侧电压确定电路故障类型。
在本公开的一些实施例中，充电控制装置4可以设置为判断如上述任一实施例上述的充电控制电路中的双继电器电路是否闭合；并在双继电器电路未闭合的情况下，闭合充电继电器电路，以实现对母线电容的平缓充电。
在本公开的一些实施例中，如图2、图3和图4所示，上述充电控制电路还可以包括第三电压检测装置3，其中：
第三电压检测装置3，设置为检测直流母线电压Vdc。
在本公开的一些实施例中，第三电压检测装置3设置DC/AC的直流侧，对含有光伏DC的系统，第三电压检测装置3与光伏电池之间还有DC-DC变换器、直流接触器和滤波板。即便不含光伏DC的系统，第三电压检测装置3与光伏电池之间也是有直流接触器和滤波板，只有当接触器闭合，第三电压检测装置3和光伏电池才是一个电位点。
充电控制装置4，设置为根据直流母线电压、网侧电压和机侧电压控制充电继电器RLY_C、第一继电器RLY1、第二继电器RLY2、第三继电器RLY3和第四继电器RLY4的通断；和/或，根据直流母线电压、网侧电压和机侧电压确定电路故障类型。
基于本公开上述实施例提供的充电控制电路，通过在交流电源侧增加充电回路，由此可以实现对母线电容的充电控制。本公开上述实施例将交流侧充电继电器(RLY_C)和充电电阻跨接在双继电器两端，在双继电器未闭合的情况下，可以通过闭合充电继电器实现对母线电容的平缓充电。本公开上述实施例在此电路的基础上还实现了交流继电器的粘连和开路检测，以及对滤波电容冲击的抑制。
在本公开的一些实施例中，如图2和图3所示，上述充电控制电路还可以包括滤波电容C，其中：
滤波电容C设置在第二电压检测装置2和电抗器之间。
对图2实施例的充电控制电路而言，由于充电电阻的存在，滤波电容从没有电荷，到第一次充电(闭合充电继电器给母线电容充电)，由于此充电过程通过充电电阻和充电继电器连接到电网实现，充电电阻有限流左右，因此本公开上述实施例可以抑制滤波电容C的冲击。而图3的电路结构，无法到达此抑制效果。
本公开上述实施例中，充电控制装置4通过执行本公开充电控制方法可以实现交流继电器的粘连和开路检测等故障检测，以及对滤波电容冲击的抑制。
下面通过具体实施例对本公开充电控制方法进行描述。
图5为本公开充电控制方法一些实施例的示意图。优选的，本实施例可由本公开充电控制装置或本公开充电控制电路执行。该方法包括以下步骤：
步骤51，判断如上述任一实施例上述的充电控制电路中的双继电器电路是否闭合。
步骤52，在双继电器电路未闭合的情况下，闭合充电继电器电路，以实现对母线电容的平缓充电。
对图2实施例的充电控制电路而言，由于充电电阻的存在，滤波电容从没有电荷，到第一次充电(闭合充电继电器给母线电容充电)，由于此充电过程通过充电电阻和充电继电器连接到电网实现，充电电阻有限流左右，因此本公开上述实施例可以抑制滤波电容C的冲击。而图3的电路结构，无法到达此抑制效果。
基于本公开上述实施例提供的充电控制方法，通过在交流电源侧增加充电回路，由此可以实现对母线电容的充电控制。本公开上述实施例将交流侧充电继电器(RLY_C)和充电电阻跨接在双继电器两端，在双继电器未闭合的情况下，可以通过闭合充电继电器实现对母线电容的平缓充电。
图6为本公开充电控制方法另一些实施例的示意图。优选的，本实施例可由本公开充电控制装置或本公开充电控制电路执行。该方法包括以下步骤：
步骤61，获取网侧电压和机侧电压。
步骤62，根据网侧电压和机侧电压控制充电继电器电路和双继电器电路的通断，和/或，根据网侧电压和机侧电压确定电路故障类型。
在本公开的一些实施例中，步骤62可以包括：
步骤621，获取直流母线电压Vdc。
步骤622，根据直流母线电压、网侧电压和机侧电压控制充电继电器电路和双继电器电路的通断，和/或，根据直流母线电压、网侧电压和机侧电压确定电路故障类型并向外播报。
在本公开的一些实施例中，上述电路故障类型可以包括交流继电器的粘连、开路、直流母线短路。
在本公开的一些实施例中，还可以实现对交流滤波电容的冲击抑制。
本公开上述实施例如果母线因某种外部原因出现短路，充电电阻在此短路情况持续接入的会导致充电电阻发热损坏，因此需要检查到直流母线短路，避免充电电阻长时间接入。
本公开上述实施例提供一种应用光伏用电设备的充电和双继电器电路，可实现交流继电器的粘连、开路、直流母线短路、交流滤波电容的冲击抑制等效果。
图7为本公开充电控制方法又一些实施例的示意图。优选的，本实施例可由本公开充电控制装置或本公开充电控制电路执行。
本公开上述实施例的充电回路控制实际上是通过电阻对直流母线电容进行充电，然后闭合第一继电器RLY1-第四继电器RLY4，最后旁路充电电阻的控制过程。其中需要对第一继电器RLY1-第四继电器RLY4的失效进行检测。
本公开上述实施例第一继电器RLY1-第四继电器RLY4的失效有两种：开路和短路(粘连)。
图7实施例的充电回路的控制及继电器失效检测方法可以包括以下步骤：
步骤1，进入充电回路控制和继电器失效检测任务。
步骤2，进入任务后判断网侧电压的有效值和机侧电压的有效值是否满足第一条件，其中，第一条件为网侧电压V1的有效值处于第一预定范围内，且机侧电压V2的有效值小于预定值。在网侧电压的有效值和机侧电压的有效值满足第一条件的情况下，执行步骤3；否则，在网侧电压的有效值和机侧电压的有效值不满足第一条件的情况下，不进行充电逻辑控制，执行步骤18，即，判定继电器失效，向外报出继电器失效故障的消息，其中，这种情况下继电器失效故障为第一继电器RLY1至第四继电器RLY4全部短路。
在本公开的一些实施例中，上述第一预定范围为10V-280V。
在本公开的一些实施例中，上述预定值为50V。
步骤3，闭合充电继电器RLY_C，开始给母线电容充电。
在本公开的一些实施例中，对图2实施例的充电控制电路而言，由于充电电阻的存在，滤波电容从没有电荷，到第一次充电(闭合充电继电器给母线电容充电)，由于此充电过程通过充电电阻和充电继电器连接到电网实现，充电电阻有限流左右，因此本公开上述实施例可以抑制滤波电容C的冲击。而图3的电路结构，无法到达此抑制效果。
步骤4，在闭合充电继电器第一预定时间间隔t1内，判断直流母线电压是否满足第二条件，其中上述第二条件为直流母线电压大于预定电压。在闭合充电继电器第一预定时间间隔t1内，直流母线电压不满足第二条件的情况下，执行步骤19，即，判定直流母线短路，向外报出直流母线短路的信息；否则，在闭合充电继电器第一预定时间间隔t1内，直流母线电压满足第二条件的情况下，执行步骤5。
在本公开的一些实施例中，第一预定时间间隔t1可以等于两倍的预定间隔t。
在本公开的一些实施例中，预定间隔t的可选范围为tmin-tmax，其中，最小值tmin取决于继电器动作后稳定的时间，最大值tmax受充电电阻发热影响。
在本公开的一些实施例中，预定间隔t的可选范围为0.3-1s。
在本公开的一些实施例中，预定间隔t可以为0.5s。
在本公开的一些实施例中，上述预定电压可以为25V。
步骤5，在闭合充电继电器2个预定时间间隔第一预定时间间隔t1后，判断直流母线电压是否满足第三条件，其中，上述第三条件为直流母线电压大于预定直流母线阈值。在闭合充电继电器2个预定时间间隔第一预定时间间隔t1后，直流母线电压满足第三条件的情况下，执行步骤6；否则，在延时12个预定时间间隔第二预定时间间隔t2后，若直流母线电压仍然不满足第三条件，则执行步骤20，即，判定充电回路故障，向外报出充电回路故障的信息。
在本公开的一些实施例中，第二预定时间间隔t2可以等于12倍的预定间隔t。
在本公开的一些实施例中，上述预定直流母线阈值可以为Vph*1.414*0.8。
步骤6，延时第三预定时间间隔t3后，闭合双继电器电路的四个继电器中的任意三个(例如第一继电器RLY1、第二继电器RLY2、第二继电器RLY3)；再延时第三预定时间间隔t3后，断开充电继电器RLY_C。
在本公开的一些实施例中，第三预定时间间隔t3可以等于12倍的预定间隔t。
步骤7，延时第三预定时间间隔t3后，判断机侧电压的有效值V2是否满足第四条件，其中，上述第四条件为机侧电压V2的有效值小于预定值。
若延时第四预定时间间隔t4后，机侧电压的有效值仍不满足第四条件，则执行步骤18，即，判定继电器失效，向外报出继电器失效故障的消息，其中，这种情况下，继电器失效故障为四个继电器中未选择的第四继电器RLY4短路。
在本公开的一些实施例中，第四预定时间间隔t4可以等于5倍的预定间隔t。
否则，在机侧电压的有效值满足第四条件的情况下，执行步骤8。
步骤8，延时第二预定时间间隔t2后，断开第一继电器RLY1-第四继电器RLY4，闭合充电继电器RLY_C；延时第二预定时间间隔t2后，闭合第一继电器RLY1、第二继电器RLY2、第四继电器RLY4，再延时第二预定时间间隔t2后，断开充电继电器RLY_C。
步骤9，延时第二预定时间间隔t2后，判断机侧电压的有效值V2是否满足第四条件，其中，上述第四条件为机侧电压V2的有效值小于预定值。
若延时第四预定时间间隔t4后，机侧电压的有效值仍不满足第四条件，则执行步骤18，即，判定继电器失效，向外报出继电器失效故障的消息，其中，这种情况下，继电器失效故障为四个继电器中未选择的第三继电器RLY3短路。
否则，在机侧电压的有效值满足第四条件的情况下，执行步骤10。
步骤10，延时第二预定时间间隔t2后，断开第一继电器RLY1-第四继电器RLY4，闭合充电继电器RLY_C；延时第二预定时间间隔t2后，闭合第一继电器RLY1、第三继电器RLY3、第四继电器RLY4，再延时第二预定时间间隔t2后，断开充电继电器RLY_C。
步骤11，延时第二预定时间间隔t2后，判断机侧电压的有效值V2是否满足第四条件，其中，上述第四条件为机侧电压V2的有效值小于预定值。
若延时第四预定时间间隔t4后，机侧电压的有效值仍不满足第四条件，则执行步骤18，即，判定继电器失效，向外报出继电器失效故障的消息，其中，这种情况下，继电器失效故障为四个继电器中未选择的第二继电器RLY2短路。
否则，在机侧电压的有效值满足第四条件的情况下，执行步骤12。
步骤12，延时第二预定时间间隔t2后，断开第一继电器RLY1-第四继电器RLY4，闭合充电继电器RLY_C；延时第二预定时间间隔t2后，闭合第二继电器RLY2、第三继电器RLY3、第四继电器RLY4，再延时第二预定时间间隔t2后，断开充电继电器RLY_C。
步骤13，延时第二预定时间间隔t2后，判断机侧电压的有效值V2是否满足第四条件，其中，上述第四条件为机侧电压V2的有效值小于预定值。
若延时第四预定时间间隔t4后，机侧电压的有效值仍不满足第四条件，则执行步骤18，即，判定继电器失效，向外报出继电器失效故障的消息，其中，这种情况下，继电器失效故障为四个继电器中未选择的第一继电器RLY1短路。
否则，在机侧电压的有效值满足第四条件的情况下，执行步骤14。
本公开上述实施例由于滤波电容已经被充电，充电继电器闭合后又断开，第一继电器RLY1-第四继电器RLY4未全部闭合的情况下，机侧电压V2其实为一个直流量(随机的，根据断开使交流电压的相位)，作为判断的值是V2电压是减去此直流分量的有效值。
步骤14，延时第二预定时间间隔t2后，判断直流母线电压是否满足第五条件，其中，上述第五条件为直流母线电压继续大于预定直流母线阈值(Vph*1.414*0.7)。在直流母线电压不 满足第五条件的情况下，执行步骤20，即，判定充电回路故障，向外报出充电回路故障的消息。否则，在直流母线电压满足第五条件的情况下，执行步骤15。
步骤15，闭合第一继电器RLY1-第四继电器RLY4，闭合充电继电器RLY_C。
在本公开的一些实施例中，在步骤15中，虽然令第一继电器RLY1-第四继电器RLY4闭合，充电继电器断开；但若其中一个继电器开路，必然导致V1和V2完全连通，即测量V2的电压的有效值不在正常范围内(理论上V2电压减去平均值的有效值应为0)。本公开上述实施例通过上述方式可以检测出第一继电器RLY1和第四继电器RLY4存在开路失效。
步骤16，延时第二预定时间间隔t2后，判断机侧电压的有效值是否满足第六条件，其中，上述第六条件为机侧电压的有效值处于第二预定范围(例如160-280V)内。在机侧电压的有效值满足第六条件的情况下，执行步骤17；否则，在机侧电压的有效值不满足第六条件的情况下，执行步骤18，即，判定继电器失效，向外报出继电器失效的消息。
在本公开的一些实施例中，第二继电器RLY2和第四继电器RLY4是从芯片控制，在检测V2电压是否处于第二预定范围(例如160-280V)之前，会检查从芯片反馈的继电器状态(SPI)判断第二继电器RLY2和第四继电器RLY4是按要求闭合和断开，如果不符合要求，则报出充电回路故障。
步骤17，在机侧电压的有效值满足第六条件的情况下，判定充电控制任务完成，向外报出充电控制任务完成的消息。
步骤18，判定继电器失效，向外报出继电器失效的消息。
步骤19，判定直流母线短路，向外报出直流母线短路的故障信息。
步骤20，判定充电回路故障，向外报出充电回路故障的信息。
在本公开的一些实施例中，充电回路故障是通过步骤5和步骤14报出的，主要判定的依据是判断母线电压是否到达预定直流母线阈值(Vph*1.414*0.7)，因为母线短路、母线负载过大、多个继电器开路失效等原因会造成充电失败。
在本公开上述实施例中，只要继电器动作后，需要对电压和状态进行判断，优选进行一个延时t后，再进行下一步操作。
本公开上述实施例提供了一种单相光伏用电设备的充电控制和继电器失效检测电路及方法，可以实现交流继电器的粘连、开路、直流母线短路、交流滤波电容的冲击抑制(在充电继电器闭合后，交流滤波的电容充电是经由充电电阻限流实现的)。
本公开上述实施例(例如图5-图6任一实施例)的充电控制方法均可由图2实施例的充电控制电路实现。
本公开上述实施例(例如图5-图6任一实施例)的充电控制方法除去对滤波电容的冲击抑制的步骤外，均可由图3实施例的充电控制电路实现。此外，相比图2实施例，图3实施例的充电控制电路还简化了V2电压有效值的计算(V2不用减平均值)。
本公开上述实施例可以实现一种应用于光伏用电设备(发用电一体设备)的充电和继电器检测电路，在此电路基础上实现认证对继电器单一检测的要求。
本公开上述实施例可以满足相关光伏标准的继电器失效检测要求，避免对滤波电容的冲击。
本公开上述实施例的充电回路控制实际上是通过电阻对直流母线电容进行充电，然后闭合第一继电器RLY1-第四继电器RLY4，最后旁路充电电阻的控制过程。其中需要对第一继电器RLY1-第四继电器RLY4的失效进行检测。
图8为本公开充电控制装置一些实施例的示意图。如图8所示，本公开上述实施例的充电控制装置(例如图4实施例的充电控制装置4)可以包括判断单元41和控制单元42，其中：
判断单元41，判断如上述任一实施例上述的充电控制电路中的双继电器电路是否闭合。
控制单元42，设置为在双继电器电路未闭合的情况下，闭合充电继电器电路，以实现对母线电容的平缓充电。
在本公开的一些实施例中，上述充电控制装置4设置为执行实现如上述任一实施例(例如图5-图7任一实施例)上述的充电控制方法的操作。
基于本公开上述实施例提供的充电控制装置，通过在交流电源侧增加充电回路，由此可以实现对母线电容的充电控制。本公开上述实施例将交流侧充电继电器(RLY_C)和充电电阻跨接在双继电器两端，在双继电器未闭合的情况下，可以通过闭合充电继电器实现对母线电容的平缓充电。
图9为本公开充电控制装置另一些实施例的示意图。如图9所示，本公开上述实施例的充电控制装置(例如图4实施例的充电控制装置4)可以包括存储器48和处理器49，其中：
存储器48，设置为存储指令。
处理器49，设置为执行上述指令，使得上述充电控制装置4执行实现如上述任一实施例(例如图5-图7任一实施例)上述的充电控制方法的操作。
本公开上述实施例可实现交流继电器的粘连、开路、直流母线短路、交流滤波电容的冲击抑制等效果。
本公开上述实施例可以实现一种应用于光伏用电设备(发用电一体设备)的充电和继电器检测电路，在此电路基础上实现认证对继电器单一检测的要求。
本公开上述实施例的充电回路控制实际上是通过电阻对直流母线电容进行充电，然后闭合第一继电器RLY1-第四继电器RLY4，最后旁路充电电阻的控制过程。其中需要对第一继电器RLY1-第四继电器RLY4的失效进行检测。
根据本公开的另一方面，提供一种光伏用电设备，包括如上述任一实施例上述的充电控制电路，和/或，包括如上述任一实施例上述的充电控制装置4。
在本公开的一些实施例中，上述光伏用电设备可以为光伏空调。
基于本公开上述实施例提供的光伏用电设备，通过在交流电源侧增加充电回路，在双继电器未闭合的情况下，可以通过闭合充电继电器实现对母线电容的平缓充电。
本公开上述实施例可实现交流继电器的粘连、开路、直流母线短路、交流滤波电容的冲击抑制等效果。
本公开上述实施例可以实现一种应设置为光伏用电设备(发用电一体设备)的充电和继电器检测电路，在此电路基础上实现认证对继电器单一检测的要求。
本公开上述实施例的充电回路控制实际上是通过电阻对直流母线电容进行充电，然后闭 合第一继电器RLY1-第四继电器RLY4，最后旁路充电电阻的控制过程。其中需要对第一继电器RLY1-第四继电器RLY4的失效进行检测。
根据本公开的另一方面，提供一种计算机可读存储介质，上述计算机可读存储介质存储有计算机指令，上述指令被处理器执行时实现如上述任一实施例上述的充电控制方法。
基于本公开上述实施例提供的计算机可读存储介质，通过在交流电源侧增加充电回路，在双继电器未闭合的情况下，可以通过闭合充电继电器实现对母线电容的平缓充电。
本公开上述实施例可实现交流继电器的粘连、开路、直流母线短路、交流滤波电容的冲击抑制等效果。
本公开上述实施例可以实现一种应设置为光伏用电设备(发用电一体设备)的充电和继电器检测电路，在此电路基础上实现认证对继电器单一检测的要求。
本公开上述实施例的充电回路控制实际上是通过电阻对直流母线电容进行充电，然后闭合第一继电器RLY1-第四继电器RLY4，最后旁路充电电阻的控制过程。其中需要对第一继电器RLY1-第四继电器RLY4的失效进行检测。
至此，已经详细描述了本公开。为了避免遮蔽本公开的构思，没有描述本领域所公知的一些细节。本领域技术人员根据上面的描述，完全可以明白如何实施这里公开的技术方案。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，上述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
本公开的描述是为了示例和描述起见而给出的，而并不是无遗漏的或者将本公开限于所公开的形式。很多修改和变化对于本领域的普通技术人员而言是显然的。选择和描述实施例是为了更好说明本公开的原理和实际应用，并且使本领域的普通技术人员能够理解本公开从而设计适于特定用途的带有各种修改的各种实施例。

Claims (34)

  1. 一种充电控制电路，其中，包括双继电器电路和充电继电器电路，其中：所述双继电器电路设置在光伏用电设备的网侧电路和机侧电路之间；所述充电继电器电路，设置为在所述双继电器电路未闭合的情况下，闭合以实现对母线电容的平缓充电。
  2. 根据权利要求1所述的充电控制电路，其中，所述充电继电器电路包括充电继电器和充电电阻。
  3. 根据权利要求1或2所述的充电控制电路，其中，所述充电继电器电路跨接在所述双继电器电路的两端。
  4. 根据权利要求1或2所述的充电控制电路，其中，所述充电继电器电路的一端与所述网侧电路与所述双继电器电路的连接点相连，所述充电继电器电路的另一端与直流母线连接。
  5. 根据权利要求1或2所述的充电控制电路，其中，所述双继电器电路包括第一继电器、第二继电器、第三继电器和第四继电器，其中：所述第一继电器和所述第二继电器串联连接在零线上；所述第三继电器和所述第四继电器串联连接在火线上。
  6. 根据权利要求5所述的充电控制电路，其中，所述第一继电器、所述第二继电器、所述第三继电器和所述第四继电器为四个单独的交流继电器。
  7. 根据权利要求5所述的充电控制电路，其中，所述双继电器电路包括两组双开关继电器，其中：第一组双开关继电器包括所述第一继电器和所述第三继电器；第二组双开关继电器包括所述第二继电器和所述第四继电器。
  8. 根据权利要求6所述的充电控制电路，其中，还包括第一电压检测装置、第二电压检测装置和充电控制装置，其中：所述第一电压检测装置，设置为所述检测光伏用电设备的网侧电路与所述双继电器电路连接处的网侧电压；所述第二电压检测装置，设置为检测所述光伏用电设备的机侧电路与所述双继电器电路连接处的机侧电压；所述充电控制装置，设置为根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断。
  9. 根据权利要求6所述的充电控制电路，其中，还包括第一电压检测装置、第二电压检测装置和充电控制装置，其中：所述第一电压检测装置，设置为所述检测光伏用电设备的网侧电路与所述双继电器电路连接处的网侧电压；所述第二电压检测装置，设置为检测所述光伏用电设备的机侧电路与所述双继电器电路连接处的机侧电压；所述充电控制装置，设置为根据所述网侧电压和所述机侧电压确定电路故障类型。
  10. 根据权利要求6所述的充电控制电路，其中，还包括第一电压检测装置、第二电压检测装置和充电控制装置，其中：所述第一电压检测装置，设置为所述检测光伏用电设备的网侧电路与所述双继电器电路连接处的网侧电压；所述第二电压检测装置，设置为检测所述光伏用电设备的机侧电路与所述双继电器电路连接处的机侧电压；所述充电控制装置，设置为根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述网侧电压和所述机侧电压确定电路故障类型。
  11. 根据权利要求8所述的充电控制电路，其中，还包括第三电压检测装置，其中：所述第三电压检测装置，设置为检测直流母线电压；所述充电控制装置，设置为根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断。
  12. 根据权利要求9所述的充电控制电路，其中，还包括第三电压检测装置，其中：所述第三电压检测装置，设置为检测直流母线电压；所述充电控制装置，设置为根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型。
  13. 根据权利要求10所述的充电控制电路，其中，还包括第三电压检测装置，其中：所述第三电压检测装置，设置为检测直流母线电压；所述充电控制装置，设置为根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型。
  14. 一种充电控制方法，其中，包括：
    判断如权利要求1至13中任一项所述的充电控制电路中的双继电器电路是否闭合；
    在所述双继电器电路未闭合的情况下，闭合充电继电器电路，以实现对母线电容的平缓充电。
  15. 根据权利要求14所述的充电控制方法，其中，还包括：
    获取网侧电压和机侧电压；
    根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断。
  16. 根据权利要求14所述的充电控制方法，其中，还包括：
    获取网侧电压和机侧电压；
    根据所述网侧电压和所述机侧电压确定电路故障类型。
  17. 根据权利要求14所述的充电控制方法，其中，还包括：
    获取网侧电压和机侧电压；
    根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述网侧电压和所述机侧电压确定电路故障类型。
  18. 根据权利要求15所述的充电控制方法，其中，根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断包括：
    获取直流母线电压；
    根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断。
  19. 根据权利要求16所述的充电控制方法，其中，根据所述网侧电压和所述机侧电压确定电路故障类型包括：
    获取直流母线电压；
    根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型。
  20. 根据权利要求17所述的充电控制方法，其中，根据所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述网侧电压和所述机侧电压确定电路故障类型包括：
    获取直流母线电压；
    根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型。
  21. 根据权利要求20所述的充电控制方法，其中，所述充电继电器电路包括充电继电器，根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型包括：
    判断所述网侧电压的有效值和所述机侧电压的有效值是否满足第一条件，其中，所述第一条件为所述网侧电压的有效值处于第一预定范围内，且所述机侧电压的有效值小于预定值；
    在所述网侧电压的有效值和所述机侧电压的有效值满足所述第一条件的情况下，闭合所述充电继电器；
    在所述网侧电压的有效值和所述机侧电压的有效值不满足所述第一条件的情况下，判定继电器失效，向外报出继电器失效故障的消息，其中，所述继电器失效故障为所述双继电器电路的第一继电器至第四继电器全部短路。
  22. 根据权利要求21所述的充电控制方法，其中，根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型还包括：
    在闭合所述充电继电器第一预定时间间隔内，判断所述直流母线电压是否满足第二条件，其中所述第二条件为所述直流母线电压大于预定电压；
    在闭合所述充电继电器所述第一预定时间间隔内，所述直流母线电压不满足所述第二条件的情况下，判定所述直流母线短路，向外报出所述直流母线短路的信息。
  23. 根据权利要求22所述的充电控制方法，其中，根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型还包括：
    在闭合所述充电继电器所述第一预定时间间隔内，所述直流母线电压满足所述第二条件的情况下，在闭合所述充电继电器所述第一预定时间间隔后，判断所述直流母线电压是否满足第三条件，其中，所述第三条件为所述直流母线电压大于预定直流母线阈值；
    在第二预定时间间隔后，若所述直流母线电压仍然不满足所述第三条件，则判定充电回路故障，向外报出所述充电回路故障的信息。
  24. 根据权利要求23所述的充电控制方法，其中，根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型还包括：
    在闭合所述充电继电器所述第一预定时间间隔后，所述直流母线电压满足所述第三条件的情况下，延时第三预定时间间隔后，闭合所述双继电器电路的四个继电器中的任意三个；
    延时所述第三预定时间间隔后，断开所述充电继电器；
    延时所述第三预定时间间隔后，判断所述机侧电压的有效值是否满足第四条件，其中，所述第四条件为所述机侧电压的有效值小于预定值；
    若延时第四预定时间间隔后，所述机侧电压的有效值仍不满足所述第四条件，则判定继电器失效，向外报出所述继电器失效故障的消息，其中，所述继电器失效故障为四个所述继电器中未选择的所述继电器短路。
  25. 根据权利要求24所述的充电控制方法，其中，所述根据直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型还包括：
    在所述机侧电压的有效值满足所述第四条件的情况下，延时所述第三预定时间间隔后，断开四个所述继电器，闭合所述充电继电器；
    延时所述第三预定时间间隔后，判断所述直流母线电压是否满足第五条件，其中，所述第五条件为所述直流母线电压继续大于所述预定直流母线阈值；
    在所述直流母线电压不满足所述第五条件的情况下，判定所述充电回路故障，向外报出所述充电回路故障的消息。
  26. 根据权利要求25所述的充电控制方法，其中，根据所述直流母线电压、所述网侧电压和所述机侧电压控制所述充电继电器电路和所述双继电器电路的通断，且根据所述直流母线电压、所述网侧电压和所述机侧电压确定电路故障类型还包括：
    在所述直流母线电压满足所述第五条件的情况下，闭合四个所述继电器，闭合所述充电继电器；
    延时所述第三预定时间间隔后，判断所述机侧电压的有效值是否满足第六条件，其中，所述第六条件为所述机侧电压的有效值处于第二预定范围内；
    在所述机侧电压的有效值满足所述第六条件的情况下，判定充电控制任务完成，向外报出所述充电控制任务完成的消息；
    在所述机侧电压的有效值不满足所述第六条件的情况下，判定所述继电器失效，向外报出所述继电器失效的消息。
  27. 一种充电控制装置，其中，包括：
    判断单元，判断如权利要求1至13中任一项所述的充电控制电路中的双继电器电路是否闭合；
    控制单元，设置为在所述双继电器电路未闭合的情况下，闭合充电继电器电路，以实现对母线电容的平缓充电。
  28. 根据权利要求27所述的充电控制装置，其中，所述充电控制装置设置为执行实现如权利要求14至26中任一项所述的充电控制方法的操作。
  29. 根据权利要求27或28所述的充电控制装置，其中，所述充电控制装置为如权利要求8至13中任一项所述的充电控制电路中的充电控制装置。
  30. 一种充电控制装置，其中，包括：
    存储器，设置为存储指令；
    处理器，设置为执行所述指令，使得所述充电控制装置执行实现如权利要求14至26中任一项所述的充电控制方法的操作。
  31. 一种光伏用电设备，其中，包括如权利要求1至13中任一项所述的充电控制电路，和/或，包括如权利要求27至30中任一项所述的充电控制装置。
  32. 一种光伏用电设备，其中，包括如权利要求27至30中任一项所述的充电控制装置。
  33. 一种光伏用电设备，其中，包括如权利要求1至13中任一项所述的充电控制电路，且包括如权利要求27至30中任一项所述的充电控制装置。
  34. 一种计算机可读存储介质，其中，所述计算机可读存储介质存储有计算机指令，所述指令被处理器执行时实现如权利要求14-26中任一项所述的充电控制方法。
PCT/CN2019/100798 2018-10-24 2019-08-15 光伏用电设备及其充电控制方法、装置和电路、存储介质 WO2020082860A1 (zh)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109103979B (zh) 2018-10-24 2023-11-10 珠海格力电器股份有限公司 光伏用电设备及其充电控制方法、装置和电路、存储介质
EP4369584A3 (en) * 2019-01-28 2024-06-05 Huawei Digital Power Technologies Co., Ltd. Device, method, and system for resolving common-mode voltage interference
CN110401256A (zh) * 2019-08-27 2019-11-01 珠海格力电器股份有限公司 用于提升可靠性的充电电路、控制方法及光伏空调设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104167737A (zh) * 2014-05-28 2014-11-26 白晓民 一种apf/svg直流电容的充放电保护电路及方法
CN104300777A (zh) * 2014-11-07 2015-01-21 深圳市永联科技有限公司 一种逆变器同步并网方法
CN104682432A (zh) * 2015-02-27 2015-06-03 广东易事特电源股份有限公司 光伏并网逆变器的继电器失效检测及滤波电容保护方法
CN205693379U (zh) * 2016-05-06 2016-11-16 永联科技南和有限公司 一种在线预测光伏逆变器母线电容寿命的电路
US20180248513A1 (en) * 2015-09-03 2018-08-30 Phoenix Contact Gmbh & Co. Kg Safe Photovoltaic System
CN109103979A (zh) * 2018-10-24 2018-12-28 珠海格力电器股份有限公司 光伏用电设备及其充电控制方法、装置和电路、存储介质
CN209072140U (zh) * 2018-10-24 2019-07-05 珠海格力电器股份有限公司 光伏用电设备及其充电控制电路

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE474363T1 (de) * 2008-06-18 2010-07-15 Sma Solar Technology Ag Schaltungsanordnung mit einem bistabilen relais zwischen einem netz und einem wechselrichter
CN102565691A (zh) * 2011-12-14 2012-07-11 广州三晶电气有限公司 一种并网逆变器的继电器失效检测装置及方法
US20150221799A1 (en) * 2014-01-29 2015-08-06 Nate D. Hawthorn Transformerless Photovoltaic Solar Heating System
CN104038088B (zh) * 2014-06-30 2017-02-15 阳光电源股份有限公司 光伏逆变电路的控制方法及控制装置
US20160118846A1 (en) * 2014-10-28 2016-04-28 Bin-Juine Huang Isolated-Type Hybrid Solar Photovoltaic System and Switching Control Method
US9812869B2 (en) * 2016-03-21 2017-11-07 Solarcity Corporation Rapid shutdown and safety disconnect for hybrid PV systems
CN107069686A (zh) * 2017-03-24 2017-08-18 江苏固德威电源科技股份有限公司 并网瞬间冲击电流抑制电路和应用其的光伏发电逆变系统
KR102371597B1 (ko) 2017-04-06 2022-03-07 현대자동차주식회사 차량의 급속충전 제어 장치 및 방법
CN107957546B (zh) * 2017-11-16 2020-07-07 阳光电源股份有限公司 一种逆变器并网交流继电器的检测方法及设备
CN107919655B (zh) * 2017-12-13 2023-07-11 珠海格力电器股份有限公司 控制电路、控制方法及空调
US11128140B2 (en) * 2019-08-28 2021-09-21 A. M. Solar, Inc. Automatic switch for single- or split-phase AC electrical power

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104167737A (zh) * 2014-05-28 2014-11-26 白晓民 一种apf/svg直流电容的充放电保护电路及方法
CN104300777A (zh) * 2014-11-07 2015-01-21 深圳市永联科技有限公司 一种逆变器同步并网方法
CN104682432A (zh) * 2015-02-27 2015-06-03 广东易事特电源股份有限公司 光伏并网逆变器的继电器失效检测及滤波电容保护方法
US20180248513A1 (en) * 2015-09-03 2018-08-30 Phoenix Contact Gmbh & Co. Kg Safe Photovoltaic System
CN205693379U (zh) * 2016-05-06 2016-11-16 永联科技南和有限公司 一种在线预测光伏逆变器母线电容寿命的电路
CN109103979A (zh) * 2018-10-24 2018-12-28 珠海格力电器股份有限公司 光伏用电设备及其充电控制方法、装置和电路、存储介质
CN209072140U (zh) * 2018-10-24 2019-07-05 珠海格力电器股份有限公司 光伏用电设备及其充电控制电路

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