CN114567004B - Black start control system and method based on photovoltaic energy storage system - Google Patents
Black start control system and method based on photovoltaic energy storage system Download PDFInfo
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- CN114567004B CN114567004B CN202210173744.8A CN202210173744A CN114567004B CN 114567004 B CN114567004 B CN 114567004B CN 202210173744 A CN202210173744 A CN 202210173744A CN 114567004 B CN114567004 B CN 114567004B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 107
- 230000003993 interaction Effects 0.000 claims abstract description 4
- 239000013078 crystal Substances 0.000 claims description 25
- 238000004804 winding Methods 0.000 claims description 25
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 abstract description 3
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- 238000010586 diagram Methods 0.000 description 2
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- 238000010248 power generation Methods 0.000 description 2
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Classifications
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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
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
- 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
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a black start control system and a method based on a photovoltaic energy storage system, which have low investment and operation cost, and can still enable an inverter to start to enter a normal working state under the condition of no photovoltaic electricity or mains supply so as to meet the power supply requirement of grid-connected or off-grid loads; the power supply system comprises a power supply module, a power supply management module and an inverter communication module; the power supply module is connected with the power supply management module and is used for supplying power to the power supply management module; the power supply management module is connected with the power supply module, the inverter communication module and the inverter module and is used for communicating interaction data with the inverter communication module to supply power to the inverter module; the inverter communication module is connected with the power supply management module and the inverter module and is used for judging black start awakening, starting the inverter module after establishing communication with the power supply management module and the inverter module, and recovering the power grid operation by using the started inverter module.
Description
Technical Field
The invention relates to the technical field of photovoltaic energy storage, in particular to a black start control system and method based on a photovoltaic energy storage system.
Background
With the rapid development of world economy, the demand of human beings for energy is increasing, solar energy is used as one of clean energy, and development is continuously carried out, so that the photovoltaic power generation technology based on solar energy utilization is also receiving extensive attention. The existing photovoltaic power generation grid-connection technology is that solar radiation energy is converted through a photovoltaic power supply, then direct-current electric energy converted from the solar radiation energy is converged into a photovoltaic grid-connection inverter, the photovoltaic grid-connection inverter converts the direct-current electric energy into alternating current and sends the alternating current into a power grid, and the current inverter needs the photovoltaic power supply or mains supply to start, but the generated energy of the photovoltaic power supply is influenced by weather and sunlight conditions, if the generated energy of the photovoltaic power supply is insufficient or cannot generate electricity under the condition of bad weather or poor sunlight conditions, the inverter cannot start to enter a normal working state under the condition of no photovoltaic power or mains supply, and the power supply requirement of grid-connection or off-grid loads cannot be met; in this case, the existing black start is performed by generating electricity by a diesel generator to temporarily supply power when the grid is not powered, but the investment and operation costs are relatively large.
Disclosure of Invention
Aiming at the problems, the invention provides a black start control system and a black start control method based on a photovoltaic energy storage system, which have low investment and operation cost, and can enable an inverter to start to enter a normal working state under the condition of no photovoltaic power or commercial power so as to meet the power supply requirement of grid-connected or off-grid loads.
The technical scheme is as follows: the utility model provides a black start control system based on photovoltaic energy storage system, its includes the dc-to-ac converter module that connects between photovoltaic power supply and electric wire netting, its characterized in that: the power supply system also comprises a power supply module, a power supply management module and an inverter communication module;
the power supply module is connected with the power supply management module and is used for supplying power to the power supply management module;
the power supply management module is connected with the power supply module, the inverter communication module and the inverter module and is used for communicating interaction data with the inverter communication module to supply power to the inverter module;
the inverter communication module is connected with the power supply management module and the inverter module and is used for judging black start awakening, starting the inverter module after communication is established with the power supply management module and the inverter module, and recovering the power grid operation by using the started inverter module.
Further, the inverter communication module is connected with a black start power supply switch S1, and is connected with a black start power supply through the black start power supply switch S1, and is used for judging black start awakening according to the opening and closing of the black start power supply switch S1; the black start power supply adopts a mobile charger;
further, the power supply module comprises a battery module, a fuse F1, a battery cell sampler U1 and a battery controller U2, wherein the battery module is formed by connecting a plurality of batteries in series; the battery cell sampler U1 adopts a model LTC6803 chip, the battery controller U2 adopts a model PIC18F45K80 chip, and the battery cell sampler U1 is connected with the battery module and is used for detecting the voltage and the temperature of a battery cell in the battery module; the battery controller U2 is connected with the battery cell sampler U1 and is used for outputting a communication instruction to the battery cell sampler U1; the negative electrode end of the battery module is connected with one end of the fuse F1;
further, the power supply management module comprises a transformer TR1, a MOS tube Q1, a fuse F2, a current sensor I1, a crystal oscillator Y1, a pre-charge resistor R0, relays RLY 1-RLY 3, a BMS master controller U3 and a BMS slave controller U4, wherein the BMS master controller U3 adopts a model SPC5646CCF0MLT1 chip, and the BMS slave controller U4 adopts a model PIC18F25K80 chip; the BMS master controller U3 is in communication connection with the BMS slave controller U4 and the battery controller U2, the BMS master controller U3 and the BMS slave controller U4 are respectively in control connection with the relays RLY 1-RLY 3, the other end of the fuse F1 is grounded after being connected with the source electrode of the MOS tube Q1 and one end of the relay RLY3, the positive electrode end of the battery module is connected with one end of the fuse F2 and one end of a primary winding of the transformer TR1, the other end of the primary winding of the transformer TR1 is connected with the drain electrode of the MOS tube Q1, the other end of the fuse F2 is connected with one end of the relay RLY1 and one end of a pre-charge resistor R0, one end of a secondary winding of the transformer TR1 is connected with the BMS slave controller U4, the other end of the secondary winding of the transformer TR1 is grounded, the other end of the pre-charge resistor R0 is connected with one end of the relay RLY2, the other end of the relay RLY1 and the other end of the relay TR2 are connected with the other end of the crystal oscillator 1, and the other end of the crystal oscillator 1 is connected with the crystal oscillator 1;
further, the inverter communication module comprises pre-charging resistors R1 and R2, a capacitor C1, diodes D1 and D2, a crystal oscillator Y2, switching tubes T1, T2 and T3, relays RLY4 and RLY5, a transformer TR2, an inductor L, a switch S2, an inverter main controller U5 and an inverter communication controller U6, wherein the inverter main controller U5 and the inverter communication controller U6 are all made of model XMC4700 chips; one end of the current sensor I1 is connected with one end of the pre-charge resistor R1, one end of the relay RLY4 and the anode of the diode D1, the inverter main controller U5 is connected with the relays RLY4 and RLY5, the inverter main controller U5 is connected with the BMS main controller U3 and the inverter communication controller U6 in a communication way, the inverter communication controller U6 is connected with the BMS main controller U3 in a communication way after passing through the switch S2, the black start power supply is connected with one end of the black start power supply switch S1, and the other end of the black start power supply switch S1 is connected with the inverter communication controller U6 and the grid of the MOS transistor Q1; the other end of the relay RLY4 is connected with one end of the relay RLY5, the other end of the pre-charge resistor R1 and one end of the pre-charge resistor R2, the other end of the relay RLY5 is connected with the other end of the pre-charge resistor R2 and one end of the inductor L, the other end of the inductor L is connected with the emitter of the switching tube T2 and the collector of the switching tube T1, the collector of the switching tube T2 is connected with the positive electrode of the diode D2, one end of the crystal oscillator Y2 and one end of the capacitor C1, the crystal oscillator Y2 is connected with the inverter main controller U5, the negative electrode of the diode D2 is connected with the negative electrode of the diode D1 and one end of the primary winding of the transformer TR2, one end of the secondary winding of the transformer TR2 is connected with the inverter main controller U5 and the inverter communication controller U6 respectively, the other end of the secondary winding of the transformer TR2 is grounded, the other end of the primary winding of the transformer TR2 is connected with the positive electrode of the switching tube T3, the other end of the secondary winding of the transformer TR2 is connected with the collector of the switching tube T3, and the other end of the transformer T3 is connected with the capacitor C1 and the collector of the crystal oscillator C2;
a black start control method based on a photovoltaic energy storage system is characterized in that: which comprises the following steps:
after the black start power supply is connected to the black start power supply through the black start power supply switch, the inverter communication module recognizes a black start signal and establishes communication with the power supply management module and the inverter module;
starting the power supply module and the power supply management module according to a black start wake-up signal sent by the inverter communication module;
and after the inverter module is charged, communicating a black start completion signal to the power supply management module and the inverter communication module to finish black start, and recovering the normal operation of the power grid through the started inverter module.
Further, it further comprises the steps of: when the black start power supply is not connected, the inverter communication module is started by supplying power to wake up the black start to enter black start operation until the inverter module is charged, and the normal operation of the power grid is recovered by the started inverter module;
further, after the black start power supply is connected to the black start power supply through the black start power supply switch, the inverter communication module sends a black start wake-up signal to the power supply management module, if the inverter communication module receives a black start response signal of the power supply management module, the black start operation is started until the power grid normally operates, and if the inverter communication module cannot receive the black start response signal of the power supply management module, the inverter communication module continues to wait for the black start response signal of the power supply management module;
further, after the black start power supply is connected to the black start power supply through the black start power supply switch, if the power supply management module receives the operation signal of the inverter module under the condition that the power supply management module is powered on, the power grid normally operates, and non-black start operation is realized; if the running signal of the inverter module is not received, entering black start running according to a black start wake-up signal sent by the inverter communication module;
further, when the power supply management module does not receive the operation signal of the inverter module, the method further comprises the following steps:
s1.1, if the power supply management module does not receive a black start wake-up signal sent by the inverter communication module, continuing to wait for a command signal to perform non-black start operation or black start operation; if the power supply management module receives a black start wake-up signal sent by the inverter communication module, continuing the next step;
s1.2, the power supply management module sends a black start response signal to the inverter communication module, and the power supply module starts running;
s1.3, the inverter communication module sends a black start state signal to the inverter module, and the inverter module charges;
s1.4, if the power supply management module and the inverter communication module receive a black start completion signal sent by the inverter module, ending black start, and recovering normal operation of a power grid through the started inverter module; and if the power supply management module and the inverter communication module do not receive the black start completion signal sent by the inverter module, continuing the step S1.3.
The invention has the advantages that the communication between the inverter communication module and the power supply management module and between the inverter module can be established, the inverter module enters a black start operation mode to start the charging of the inverter module, and then the running of the power grid can be recovered through the started inverter module, so that the inverter can still be started to enter a normal working state under the condition of no photovoltaic power or commercial power, the power supply requirement of grid connection or off-grid load is met, the investment and the operation cost are lower, and the invention has better economic use value.
Drawings
FIG. 1 is a block diagram of the structure of the present invention;
FIG. 2 is a schematic circuit diagram of the present invention;
fig. 3 is a flow chart of the present invention.
Detailed Description
As shown in fig. 1 to 3, the black start control system based on the photovoltaic energy storage system of the invention comprises an inverter module connected between a photovoltaic power supply and a power grid, wherein the inverter module is used for converting a direct current power supply into an alternating current power supply and sending the alternating current power supply into the power grid, and the black start control system further comprises a power supply module, a power supply management module and an inverter communication module;
the power supply module is connected with the power supply management module and is used for supplying power to the power supply management module, detecting data of each battery cell and uploading all the data to the power supply management module;
the power supply management module is connected with the power supply module, the inverter communication module and the inverter module and is used for communicating interaction data with the inverter communication module to supply power to the inverter module;
the inverter communication module is connected with the power supply management module and the inverter module and is used for judging black start awakening, starting the inverter module after establishing communication with the power supply management module and the inverter module, and recovering the power grid operation by using the started inverter module.
The inverter communication module is connected with the black start power supply switch S1, and is connected with a black start power supply through the black start power supply switch S1, and is used for judging the black start awakening according to the opening and closing of the black start power supply switch S1; the mobile charger that black start power adopted.
The power supply module comprises a battery module, a fuse F1, a battery cell sampler U1 and a battery controller U2, wherein the battery module is formed by connecting a plurality of batteries BT in series; the battery cell sampler U1 is connected with the battery module and is used for detecting the voltage and the temperature of a battery cell in the battery module; the battery controller U2 is connected with the battery cell sampler U1 and is used for outputting a communication instruction to the battery cell sampler U1; the negative end of the battery module is connected with one end of the fuse F1;
the power supply management module comprises a transformer TR1, a MOS tube Q1, a fuse F2, a current sensor I1, a crystal oscillator Y1, a pre-charge resistor R0, relays RLY 1-RLY 3, a BMS master controller U3 and a BMS slave controller U4, wherein the BMS master controller U3 is in communication connection with the BMS slave controller U4 and a battery controller U2, the BMS master controller U3 and the BMS slave controller U4 are respectively in control connection with the relays RLY 1-RLY 3, the other end of the fuse F1 is respectively connected with the source electrode of the MOS tube Q1 and one end of the relay RLY3 and then grounded, the positive electrode end of the battery module is connected with one end of the primary winding of the fuse F2 and one end of the transformer TR1, the other end of the primary winding of the transformer TR1 is connected with the drain electrode of the MOS tube Q1, the other end of the fuse F2 is connected with one end of the relay RLY1 and one end of the pre-charge resistor R0, one end of the secondary winding of the transformer TR1 is connected with the BMS slave controller U4, the other end of the secondary winding of the transformer F1 is connected with the other end of the relay RLY1 and one end of the crystal oscillator RLY1 is connected with one end of the crystal oscillator 1 and one end of the crystal oscillator 1 is connected with one end of the crystal oscillator 1;
the inverter communication module comprises pre-charging resistors R1 and R2, a capacitor C1, diodes D1 and D2, a crystal oscillator Y2, switching tubes T1, T2 and T3, relays RLY4 and RLY5, a transformer TR2, an inductor L, a switch S2, an inverter main controller U5 and an inverter communication controller U6, one end of a current sensor I1 is connected with one end of the pre-charging resistor R1, one end of the relay RLY4 and the positive electrode of the diode D1, the inverter main controller U5 is connected with the relays RLY4 and RLY5, the inverter main controller U5 is in communication connection with the BMS main controller U3 and the inverter communication controller U6, the inverter communication controller U6 is connected with one end of a black start power supply switch S1 after passing through the switch S2, and the other end of the black start power supply switch S1 is connected with the inverter communication controller U6 and the grid electrode of the MOS transistor Q1; the other end of the relay RLY4 is connected with one end of the relay RLY5, the other end of the pre-charge resistor R1 and one end of the pre-charge resistor R2, the other end of the relay RLY5 is connected with the other end of the pre-charge resistor R2 and one end of the inductor L, the other end of the inductor L is connected with the emitting electrode of the switch tube T2 and the collecting electrode of the switch tube T1, the collecting electrode of the switch tube T2 is connected with the positive electrode of the diode D2, one end of the crystal oscillator Y2 and one end of the capacitor C1, the crystal oscillator Y2 is connected with the inverter main controller U5, the negative electrode of the diode D2 is connected with the negative electrode of the diode D1 and one end of the primary winding of the transformer TR2, one end of the secondary winding of the transformer TR2 is connected with the inverter main controller U5 and the other end of the inverter communication controller U6 respectively, the other end of the secondary winding of the transformer TR2 is grounded, the other end of the primary winding of the transformer TR2 is connected with the switch tube T3, the emitting electrodes of the switch tube T1 and T3 are connected with the capacitor C1 and the other end of the crystal oscillator Y2 and the other end of the relay RLY 3.
The battery cell sampler U1 adopts a model LTC6803 chip and is used for detecting the voltage and the temperature of the battery BT and communicating with the battery controller U2;
the battery controller U2 adopts a PIC18F45K80 chip and is communicated with the BMS main controller U3;
the BMS main controller U3 adopts a model SPC5646CCF0MLT1 chip, can play a role in protecting system abnormality, can calculate the capacity and service life of the battery BT, calculates the allowable charge and discharge power of the battery according to the battery state, communicates data with the inverter main controller U5 and the inverter communication controller U6, and gives the allowable charge and discharge power to the inverter module; the BMS slave controller U4 adopts a model PIC18F25K80 chip and is communicated with the BMS master controller U3;
the inverter main controller U5 adopts a model XMC4700 chip, can play a role in protecting system abnormality, is used for receiving data of the inverter communication controller U6 and the BMS main controller U3 and issuing corresponding instructions;
the inverter communication controller U6 adopts model XMC4700 chips, can play a role in protecting system abnormality, is used for receiving external data (namely, receiving a black start signal after a black start power supply switch) and communicates with the inverter main controller U5 and the BMS main controller U3.
A black start control method based on a photovoltaic energy storage system comprises the following steps:
when the black start power supply is not connected, namely the whole system is in a shutdown state, the inverter communication module is started by supplying power to wake up the black start to enter black start operation until the inverter module is charged, and the normal operation of the power grid is recovered by the started inverter module;
after the black start power supply is connected to the black start power supply through the black start power supply switch, the inverter communication module recognizes a black start signal and establishes communication with the power supply management module and the inverter module;
starting a power supply module and a power supply management module according to a black start wake-up signal sent by the inverter communication module;
and after the inverter module is charged, communicating a black start completion signal to the power supply management module and the inverter communication module to finish black start, and recovering the normal operation of the power grid through the started inverter module.
Specifically, after a black start power supply is connected to a black start power supply through a black start power supply switch, the inverter communication module sends a black start wake-up signal to the power supply management module, if the inverter communication module receives a black start response signal of the power supply management module, the inverter communication module enters black start operation until a power grid normally operates, and if the inverter communication module cannot receive the black start response signal of the power supply management module, the inverter communication module continues to wait for the black start response signal of the power supply management module;
or after the black start power supply is connected to the black start power supply through the black start power supply switch, if the power supply management module receives the operation signal of the inverter module under the condition of power on the power supply management module, the power grid normally operates, and non-black start operation is realized; if the power supply management module does not receive the operation signal of the inverter module, the method comprises the following steps:
s1.1, if the power supply management module does not receive a black start wake-up signal sent by the inverter communication module, continuing to wait for a command signal to perform non-black start operation or black start operation; if the power supply management module receives a black start wake-up signal sent by the inverter communication module, continuing the next step;
s1.2, a power supply management module sends a black start response signal to an inverter communication module, and the power supply module starts running;
s1.3, the inverter communication module sends a black start state signal to the inverter module, the inverter module charges, namely, closes a relay RLY5 to charge a capacitor C1 until the voltage of the capacitor C1 is more than or equal to 99% of the voltage of a battery module, closes a relay RLY4, the inverter module charges completely, and communicates a black start completion signal to the power supply management module and the inverter communication module;
s1.4, if the power supply management module and the inverter communication module receive a black start completion signal sent by the inverter module, namely the charging of the inverter module is completed, ending the black start, and recovering the normal operation of the power grid through the started inverter module; if the power supply management module and the inverter communication module do not receive the black start completion signal sent by the inverter module, continuing to step S1.3.
The normal operation refers to starting the inverter module, and recovering the power grid operation through the started inverter module.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. The utility model provides a black start control system based on photovoltaic energy storage system, its includes the dc-to-ac converter module that connects between photovoltaic power supply and electric wire netting, its characterized in that: the power supply system also comprises a power supply module, a power supply management module and an inverter communication module;
the power supply module is connected with the power supply management module and is used for supplying power to the power supply management module;
the power supply management module is connected with the power supply module, the inverter communication module and the inverter module and is used for communicating interaction data with the inverter communication module to supply power to the inverter module;
the inverter communication module is connected with the power supply management module and the inverter module and is used for judging black start awakening, starting the inverter module after communication is established with the power supply management module and the inverter module, and recovering the power grid operation by using the started inverter module;
the power supply module comprises a battery module, a fuse F1 and a battery controller U2; the power supply management module comprises a transformer TR1, a MOS tube Q1, a fuse F2, a current sensor I1, a crystal oscillator Y1, a pre-charging resistor R0, relays RLY 1-RLY 3, a BMS master controller U3 and a BMS slave controller U4, wherein the BMS master controller U3 adopts a model SPC5646CCF0MLT1 chip, and the BMS slave controller U4 adopts a model PIC18F25K80 chip; the battery pack comprises a BMS main controller U3, a BMS slave controller U4, a battery controller U2 and a BMS slave controller U4, wherein the BMS main controller U3 and the BMS slave controller U4 are respectively connected with the relays RLY 1-RLY 3 in a control mode, the other end of a fuse F1 is grounded after being connected with the source electrode of a MOS tube Q1 and one end of the relay RLY3, the positive end of a battery module is connected with one end of the fuse F2 and one end of a primary winding of a transformer TR1 in a homogeneous mode, the other end of the primary winding of the transformer TR1 is connected with the drain electrode of the MOS tube Q1, one end of a secondary winding of the fuse F2 is connected with one end of the relay RLY1, the other end of the secondary winding of the transformer TR1 is grounded, the other end of the pre-charge resistor R0 is connected with one end of the RLY2, the other end of the relay RLY1 is connected with the crystal oscillator 1, and the other end of the crystal oscillator 1 is connected with the other end of the crystal oscillator 1.
2. The photovoltaic energy storage system-based black start control system of claim 1, wherein: the inverter communication module is connected with the black start power supply switch S1, and is connected with a black start power supply through the black start power supply switch S1, and is used for judging black start awakening according to the opening and closing of the black start power supply switch S1; and the black start power supply adopts a mobile charger.
3. The photovoltaic energy storage system-based black start control system of claim 2, wherein: the power supply module further comprises a battery cell sampler U1, and the battery module is formed by connecting a plurality of batteries in series; the battery cell sampler U1 adopts a model LTC6803 chip, the battery controller U2 adopts a model PIC18F45K80 chip, and the battery cell sampler U1 is connected with the battery module and is used for detecting the voltage and the temperature of a battery cell in the battery module; the battery controller U2 is connected with the battery cell sampler U1 and is used for outputting a communication instruction to the battery cell sampler U1; the negative electrode end of the battery module is connected with one end of the fuse F1.
4. The photovoltaic energy storage system-based black start control system of claim 2, wherein: the inverter communication module comprises pre-charging resistors R1 and R2, a capacitor C1, diodes D1 and D2, a crystal oscillator Y2, switching tubes T1, T2 and T3, relays RLY4 and RLY5, a transformer TR2, an inductor L, a switch S2, an inverter main controller U5 and an inverter communication controller U6, wherein the inverter main controller U5 and the inverter communication controller U6 are all made of model XMC4700 chips; one end of the current sensor I1 is connected with one end of the pre-charge resistor R1, one end of the relay RLY4 and the anode of the diode D1, the inverter main controller U5 is connected with the relays RLY4 and RLY5, the inverter main controller U5 is connected with the BMS main controller U3 and the inverter communication controller U6 in a communication way, the inverter communication controller U6 is connected with the BMS main controller U3 in a communication way after passing through the switch S2, the black start power supply is connected with one end of the black start power supply switch S1, and the other end of the black start power supply switch S1 is connected with the inverter communication controller U6 and the grid of the MOS transistor Q1; the other end of relay RLY4 with relay RLY 5's one end, precharge resistor R1's the other end, precharge resistor R2's one end homogeneous phase is connected, relay RLY 5's the other end with precharge resistor R2's the other end, inductance L's one end homogeneous phase is connected, inductance L's the other end with switch tube T2's projecting pole, switch tube T1's collecting electrode homogeneous phase is connected, switch tube T2's collecting electrode with diode D2's positive pole, crystal oscillator Y2's one end, electric capacity C1's one end homogeneous phase is connected, and crystal oscillator Y2 with inverter master controller U5's one end homogeneous phase is connected, diode D2's negative pole with diode D1's negative pole, transformer TR2 primary winding's one end homogeneous phase is connected, transformer TR2 secondary winding's one end respectively with inverter master controller U5, inverter communication controller U6, transformer TR2 secondary winding's the other end ground, transformer TR2 primary winding's the other end with switch tube T3's positive pole, the other end of switch tube T1, the other end of switch tube T3, electric capacity C1, the other end of switch tube T3, the electric capacity C3 is connected with the equal phase of crystal oscillator Y.
5. A black start control method based on a photovoltaic energy storage system is characterized in that: the black start control system based on the photovoltaic energy storage system according to any one of claims 1 to 4, wherein the method further comprises the following steps:
after the black start power supply is connected to the black start power supply through the black start power supply switch, the inverter communication module recognizes a black start signal and establishes communication with the power supply management module and the inverter module;
starting the power supply module and the power supply management module according to a black start wake-up signal sent by the inverter communication module;
after the inverter module is charged, communicating a black start completion signal to the power supply management module and the inverter communication module to end black start, and recovering normal operation of the power grid through the started inverter module;
after the black start power supply is connected to the black start power supply through the black start power supply switch, if the power supply management module receives the operation signal of the inverter module under the condition that the power supply management module is powered on, the power grid normally operates, and non-black start operation is realized; and if the running signal of the inverter module is not received, entering black start running according to a black start wake-up signal sent by the inverter communication module.
6. The black start control method based on the photovoltaic energy storage system according to claim 5, wherein: it also comprises the steps of: when the black start power supply is not connected, the inverter communication module is started through power supply of the power supply module to wake up black start and enter black start operation until the inverter module is charged, and the normal operation of the power grid is recovered through the started inverter module.
7. The black start control method based on the photovoltaic energy storage system according to claim 5, wherein: after the black start power supply is connected to the black start power supply through the black start power supply switch, the inverter communication module sends a black start wake-up signal to the power supply management module, if the inverter communication module receives a black start response signal of the power supply management module, the black start operation is started until the power grid normally operates, and if the inverter communication module does not receive the black start response signal of the power supply management module, the inverter communication module continues to wait for the black start response signal of the power supply management module.
8. The black start control method based on the photovoltaic energy storage system according to claim 5, wherein: when the power supply management module does not receive the operation signal of the inverter module, the method further comprises the following steps:
s1.1, if the power supply management module does not receive a black start wake-up signal sent by the inverter communication module, continuing to wait for a command signal to perform non-black start operation or black start operation; if the power supply management module receives a black start wake-up signal sent by the inverter communication module, continuing the next step;
s1.2, the power supply management module sends a black start response signal to the inverter communication module, and the power supply module starts running;
s1.3, the inverter communication module sends a black start state signal to the inverter module, and the inverter module charges;
s1.4, if the power supply management module and the inverter communication module receive a black start completion signal sent by the inverter module, ending black start, and recovering normal operation of a power grid through the started inverter module; and if the power supply management module and the inverter communication module do not receive the black start completion signal sent by the inverter module, continuing the step S1.3.
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