CN211908651U

CN211908651U - Black start circuit of energy storage converter

Info

Publication number: CN211908651U
Application number: CN202020725687.6U
Authority: CN
Inventors: 彭小超
Original assignee: Shenzhen Geruide Electric Co ltd
Current assignee: Shenzhen Geruide Electric Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2020-11-10
Anticipated expiration: 2030-05-06

Abstract

The utility model relates to an energy storage converter technical field, in particular to energy storage converter's black starting circuit, including battery voltage supply circuit, reset switch circuit, first control circuit, auxiliary power supply, second control circuit and optoelectronic coupler U25, through setting up the start of reset switch circuit unified control energy storage converter, reset switch circuit during operation, optoelectronic coupler U25 switches on, battery voltage supply circuit work, make first control circuit work of getting charged, thereby auxiliary power supply starts, second control circuit is electrified, the converter starts to accomplish, the converter that does not have self-starting ability in the drive system starts, and then realize the recovery of entire system; after the start-up is completed, the reset switch circuit does not work, the photoelectric coupler U25 is cut off, the battery voltage power supply circuit does not work, the first control circuit loses power and cannot work, and the auxiliary power supply stops working, so that the standby loss of the system is reduced to the minimum.

Description

Black start circuit of energy storage converter

Technical Field

The utility model relates to an energy storage converter technical field, in particular to energy storage converter's black starting circuit.

Background

The black start means that after the whole power system is stopped due to a fault, the system is completely powered off and is in a full black state, other network help is not relied on, a generator set with self-starting capability in the system is started to drive the generator set without the self-starting capability, the recovery range of the system is gradually expanded, and finally the recovery of the whole system is realized.

Various renewable energy converters, such as photovoltaic converters, wind power converters and the like, do not have self-starting capability, so in an application scene of multi-energy complementation and energy internet, a black starting source should have self-starting capability, the self-starting capability of an energy storage converter is just needed for constructing a microgrid, and a battery is connected to the microgrid through the energy storage converter, so that the electrochemical energy storage converter can be used as the black starting source, and the microgrid is often used in the scenes with frequent power failure, such as remote villages, islands and the like; the common practice of black start is that the converter is in a standby mode, and is automatically realized through a remote instruction or software, and the converter starts to start, but the method has a great problem: 1) the requirement of standby power consumption is not met; 2) the auxiliary source needs to work all the time, so that large standby loss exists, and if the standby time is long, the risk that the battery is possibly discharged is caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to solve the technical problems that: provided is a black start circuit of an energy storage converter, which can reduce standby loss.

In order to solve the technical problem, the utility model discloses a technical scheme be:

the utility model provides an energy storage converter's black start circuit, includes battery voltage supply circuit, reset switch circuit, first control circuit, auxiliary power supply, second control circuit and optoelectronic coupler U25, optoelectronic coupler U25's first end is connected with battery voltage supply circuit electricity, optoelectronic coupler U25's second end is connected with the reset switch circuit electricity, optoelectronic coupler U25's third end is connected with first control circuit electricity, auxiliary control circuit is connected with first control circuit and auxiliary power supply electricity respectively, second control circuit is connected with the auxiliary power supply electricity.

Further, the battery voltage power supply circuit comprises a resistor R443, a resistor R444, a resistor R445, a resistor R447, a resistor R448, a diode D83, a diode D86, an electrolytic capacitor EC212 and an electrolytic capacitor EC215, a first end of the photocoupler U25 is electrically connected with a cathode of the diode D86 and one end of the electrolytic capacitor EC215 respectively, the other end of the electrolytic capacitor EC215 is respectively connected with one end of a resistor R448, one end of an electrolytic capacitor EC212 and the cathode of a diode D83, the other end of the electrolytic capacitor EC212 is respectively and electrically connected with a resistor R448, a diode D86, the second end of a photoelectric coupler U25 and a reset switch circuit, the anode of the diode D83 is electrically connected to one end of a resistor R445, the other end of the resistor R445 is electrically connected to one end of a resistor R444, the other end of the resistor R444 is electrically connected to one end of the resistor R447, and the other end of the resistor R447 is electrically connected to one end of the resistor R443.

Further, the reset switch circuit comprises a resistor R459, a diode D81 and a reset switch S1, wherein one end of the reset switch S1 is electrically connected with the cathode of the diode D81, and the anode of the diode D81 is electrically connected with the battery voltage supply circuit and the second end of the photoelectric coupler U25.

Further, the first control circuit comprises a resistor R51, a resistor R52, a resistor R53, a resistor R54, a resistor R55, a resistor R72, a resistor R74, a capacitor C74, a voltage regulator ZD 74 and a transistor Q74, a third end of the photocoupler U74 is electrically connected with one end of the resistor R74, the other end of the resistor R74 is electrically connected with a cathode of the voltage regulator ZD 74, one end of the resistor R74 and one end of the resistor R74 respectively, an anode of the voltage regulator ZD 74 is electrically connected with one end of the capacitor C74, one end of the resistor R74 and an emitter of the transistor Q74 respectively, an anode of the voltage regulator ZD 74, one end of the capacitor C74, one end of the resistor R74 and an emitter of the transistor Q74 are all grounded, the other end of the resistor R74 is electrically connected with the other end of the capacitor C74, the other end of the resistor R74 and a collector of the transistor Q74 are electrically connected with the auxiliary source control circuit, the resistor R74, the other end of the resistor R53 is electrically connected with one end of a resistor R54, and the other end of the resistor R54 is electrically connected with one end of a resistor R55.

Further, the auxiliary source control circuit includes a resistor R73, a resistor R76, a resistor R77, a resistor R78, a resistor R318, a resistor R321, a resistor R322, a capacitor C78, a diode D78, and a chip U78, a first pin of the chip U78 is electrically connected to one end of the resistor R78 and one end of the capacitor C78, the other end of the resistor R78 is electrically connected to one end of the capacitor C78, the other end of the capacitor C78 is electrically connected to the other end of the capacitor C78, a second pin of the chip U78, one end of the resistor R78, one end of the capacitor C78 and one end of the resistor R78, a third pin of the chip U78 is electrically connected to one end of the capacitor C78, one end of the capacitor C78 and the other end of the capacitor C78, a fifth pin of the chip U6 is electrically connected to the other end of the capacitor C53, the other end of the resistor R76, the other end of the capacitor C52, the other end of the capacitor C48, the one end of the capacitor C46, the one end of the capacitor C47, the anode of the diode D53, and the anode of the diode D18, and the anode of the diode D18 is grounded, a sixth pin of the chip U6 is electrically connected to the cathode of the diode D18 and the one end of the resistor R73, a seventh pin of the chip U6 is electrically connected to the cathode of the capacitor C47 and the cathode of the diode D53, an eighth pin of the chip U6 is electrically connected to the other end of the capacitor C46 and the one end of the resistor R322, the other end of the resistor R322 is electrically connected to the one end of the resistor R321, and the other end of the resistor R321 is electrically connected to the fourth pin.

The beneficial effects of the utility model reside in that:

the reset switch circuit is arranged to uniformly control the starting of the energy storage converter, when the reset switch circuit works, the photoelectric coupler U25 is conducted, the battery voltage power supply circuit works to enable the first control circuit to be electrified to work, so that the auxiliary power supply is started, the second control circuit is electrified, the starting of the converter is completed, the converter without self-starting capability in the system is driven to start, and the recovery of the whole system is further realized; after the start-up is completed, the reset switch circuit does not work, the photoelectric coupler U25 is cut off, the battery voltage power supply circuit does not work, the first control circuit loses power and cannot work, and the auxiliary power supply stops working, so that the standby loss of the system is reduced to the minimum.

Drawings

Fig. 1 is a circuit block diagram of a black start circuit of an energy storage converter according to the present invention;

fig. 2 is a schematic circuit diagram of a black start circuit of an energy storage converter according to the present invention;

fig. 3 is a schematic circuit diagram of an auxiliary power control circuit of a black start circuit of an energy storage converter according to the present invention;

description of reference numerals:

1. a battery voltage supply circuit; 2. a reset switch circuit; 3. a first control circuit; 4. an auxiliary source control circuit; 5. an auxiliary power supply; 6. a second control circuit.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1, the technical solution provided by the present invention is:

From the above description, the beneficial effects of the present invention are:

From the above description, the battery voltage is divided by the resistor R443, the resistor R444, the resistor R445, the resistor R447 and the resistor R448 to supply power to the photocoupler U25, the electrolytic capacitor EC212 stabilizes and supplies a dc voltage, the electrolytic capacitor EC215 blocks the dc voltage, the diode D83 prevents the polarity of the battery from being reversed, and the diode D86 clamps the dc voltage.

As can be seen from the above description, when the reset switch is pressed, the photocoupler U25 is grounded through the diode D81, the reset switch S1, and the resistor R459 to form a conductive loop, the resistor R459 is a ground resistor, and the diode D81 prevents the reverse connection of the battery.

As can be seen from the above description, after the photocoupler U25 is turned on, the battery voltage forms a conducting loop through the resistor R55, the resistor R54, the resistor R53, the resistor R51, the resistor R52 and the photocoupler U25, the base voltage of the transistor Q11 is pulled low, the transistor Q11 is turned off, the control pin corresponding to the auxiliary power control circuit suspends, the auxiliary power supply operates normally, and the second control circuit starts to operate accordingly; when the photoelectric coupler U25 is switched on, the resistor R55, the resistor R54, the resistor R53, the resistor R51 and the resistor R52 have a voltage division function and form a switching-on loop with the photoelectric coupler U25, the voltage of the base of the triode Q11 is pulled down, and the triode Q11 is cut off; when the photoelectric coupler U25 is cut off, the resistor R72, the resistor R74, the resistor R55, the resistor R54, the resistor R53 and the resistor R51 form a voltage division loop, a voltage division driving triode Q11 is provided, the triode Q11 is conducted, the capacitor C45 plays a role in filtering, and the voltage stabilizing tube ZD13 prevents signal false interference.

As can be seen from the above description, the first pin of the chip U6, the resistor R78, the capacitor C49, and the capacitor C50 form a feedback compensation circuit, the second pin of the chip U6, the resistor R77, and the resistor R76 form a voltage division feedback circuit, the third pin of the chip U6, the resistor R318, and the capacitor C52 form a current sampling filter circuit, and the fourth pin of the chip U6, the resistor R322, the resistor R321, and the capacitor C48 form an oscillation circuit.

Referring to fig. 1 and fig. 2, a first embodiment of the present invention is:

referring to fig. 1, a black start circuit of an energy storage converter includes a battery voltage supply circuit 1, a reset switch circuit 2, a first control circuit 3, an auxiliary source control circuit 4, an auxiliary power supply 5, a second control circuit 6, and a photoelectric coupler U25, wherein a first end of the photoelectric coupler U25 is electrically connected to the battery voltage supply circuit 1, a second end of the photoelectric coupler U25 is electrically connected to the reset switch circuit 2, a third end of the photoelectric coupler U25 is electrically connected to the first control circuit 3, the auxiliary source control circuit 4 is electrically connected to the first control circuit 3 and the auxiliary power supply 5, respectively, and the second control circuit 6 is electrically connected to the auxiliary power supply 5.

The second control circuit 6 is a DSP controller (model number TMS320F28377 SZWT).

Referring to fig. 2, the battery voltage power supply circuit 1 includes a resistor R443 (having a resistance of 43K Ω), a resistor R444 (having a resistance of 43K Ω), a resistor R445 (having a resistance of 43K Ω), a resistor R447 (having a resistance of 43K Ω), a resistor R448 (having a resistance of 20K Ω), a diode D83 (model S3M-13-F SMC (3A1KV)), a diode D86 (model S3M-13-F SMC (3A1KV)), an electrolytic capacitor EC212 (having a capacitance of 33uF), and an electrolytic capacitor EC215 (having a capacitance of 220uF), wherein a first end of the photocoupler U25 is electrically connected to a cathode of the diode D86 and an end of the electrolytic capacitor EC215, a second end of the electrolytic capacitor EC215 is electrically connected to an end of the resistor R448, an end of the electrolytic capacitor EC212 and a cathode of the diode D83, and the other end of the electrolytic capacitor EC215, an end of the resistor R448, an end of the electrolytic capacitor EC212 and a cathode of the diode D83 are electrically connected to zero, the other end of the electrolytic capacitor EC212 is respectively electrically connected with a resistor R448, a diode D86, a second end of a photoelectric coupler U25 and the reset switch circuit 2, the anode of the diode D83 is electrically connected with one end of the resistor R445, the other end of the resistor R445 is electrically connected with one end of a resistor R444, the other end of the resistor R444 is electrically connected with one end of a resistor R447, the other end of the resistor R447 is electrically connected with one end of a resistor R443, and the other end of the resistor R443 and the other end of the resistor R55 are connected with a battery voltage V_{BAT_BUS+}。

Referring to fig. 2, the reset switch circuit 2 includes a resistor R459 (having a resistance value of 10K Ω), a diode D81 (having a model of MMSD4148, a voltage value of 75V and a current value of 200mA), and a reset switch S1 (having a model of PBP-16 push-button switch), one end of the reset switch S1 is electrically connected to the cathode of the diode D81, an anode of the diode D81 is electrically connected to the battery voltage supply circuit 1 and the second end of the photocoupler U25, respectively, one end of the reset switch is connected to BAT _ Cold _ Start + (BAT _ Cold _ Start + is a signal name and represents a positive end of the signal name), the other end of the reset switch S1 is connected to BAT _ Cold _ Start- (BAT _ Cold _ Start-is a signal name and represents a negative end of the signal name), and the other end of the resistor R459 is connected to a zero line.

Referring to fig. 2, the first control circuit 3 includes a resistor R51 (having a resistance of 470K Ω), a resistor R52 (having a resistance of 0 Ω), a resistor R53 (having a resistance of 470K Ω), a resistor R54 (having a resistance of 470K Ω), a resistor R55 (having a resistance of 470K Ω), a resistor R72 (having a resistance of 100 Ω), a resistor R74 (having a resistance of 47K Ω), a capacitor C45 (having a capacitance of 1uF), a regulator ZD13 (having a model of MMSZ5242B, having a voltage of 12V and a power of 250mW), and a triode Q11 (having a model of MMBT4401LT1), wherein a third terminal of the photocoupler U25 is electrically connected to one terminal of the resistor R52, another terminal of the resistor R52 is electrically connected to a cathode of the regulator 13, one terminal of the resistor 573r 5 and one terminal of the resistor R72, the regulator ZD13 is electrically connected to one terminal of the anode of the capacitor C6324, one terminal of the resistor ZD 74 and an emitter 13 of the resistor ZD 74, and the triode ZD 599 are electrically connected, One end of a capacitor C45, one end of a resistor R74 and an emitter of a triode Q11 are all grounded, the other end of the resistor R72 is respectively electrically connected with the other end of a capacitor C45, the other end of a resistor R74 and a base of a triode Q11, a collector of the triode Q11 is electrically connected with the auxiliary source control circuit 4, the other end of the resistor R51 is electrically connected with one end of a resistor R53, the other end of the resistor R53 is electrically connected with one end of a resistor R54, and the other end of the resistor R54 is electrically connected with one end of a resistor R55.

Referring to fig. 3, the auxiliary source control circuit 4 includes a resistor R73 (with a resistance of 20 Ω), a resistor R76 (with a resistance of 10K Ω), a resistor R77 (with a resistance of 49.9K Ω), a resistor R78 (with a resistance of 120K Ω), a resistor R318 (with a resistance of 680 Ω), a resistor R321 (with a resistance of 2.49K Ω), a resistor R322 (with a resistance of 5.1K Ω), a capacitor C46 (with a capacitance of 1uF), a capacitor C47 (with a capacitance of 1uF), a capacitor C48 (with a capacitance of 0.01uF), a capacitor C49 (with a capacitance of 0.0047uF), a capacitor C50 (with a capacitance of 22uF), a capacitor C51 (with a capacitance of 100pF), a capacitor C38 (with a capacitance of 0.01uF), a capacitor C53 (with a capacitance of 1uF), a diode D53 (mmz 18T1G), a diode D2, and a chip U6 (with a model 396344), wherein the first terminal of the first chip is electrically connected to the first terminal of the first chip R73723, the other end of the resistor R78 is electrically connected to one end of a capacitor C50, the other end of the capacitor C50 is electrically connected to the other end of the capacitor C49, the second pin of the chip U6, one end of the resistor R77, one end of the capacitor C53 and one end of the resistor R76, the third pin of the chip U6 is electrically connected to one end of the capacitor C51, one end of the capacitor C52 and one end of the resistor R318, the fourth pin of the chip U6 is electrically connected to the other end of the capacitor C51 and one end of the capacitor C48, the fifth pin of the chip U6 is electrically connected to the other end of the capacitor C53, the other end of the resistor R76, the other end of the capacitor C52, the other end of the capacitor C48, one end of the capacitor C48, the anode of the diode D48 and the anode of the diode D48, the anode of the diode D48 is grounded, the sixth pin of the chip U48 is electrically connected to the cathode of the diode D48 and the resistor R48, the seventh pin of the chip U6 is electrically connected to the other end of the capacitor C47 and the cathode of the diode D53, the eighth pin of the chip U6 is electrically connected to the other end of the capacitor C46 and one end of the resistor R322, the other end of the resistor R322 is electrically connected to one end of the resistor R321, and the other end of the resistor R321 is electrically connected to the fourth pin of the chip U6.

The working principle of the black start circuit of the energy storage converter is as follows:

the reset switch S1 is closed, the battery voltage resistor R443, the resistor R447, the resistor R444, the resistor R445, the diode D83, the electrolytic capacitor EC215, the diode D81 and the resistor R459 are connected, the photoelectric coupler U25 is connected, the battery voltage flows through the resistor R55, the resistor R54, the resistor R53, the resistor R51, the resistor R52 and the photoelectric coupler U25, the triode Q11 is disconnected, a control pin of a control chip U1 of the auxiliary power supply control circuit 4 is controlled to suspend and not be pulled down any more, and the auxiliary power supply 5 can be started; after the starting is finished, the electrolytic capacitor EC215 is blocked, the photoelectric coupler U25 is turned off, the battery voltage flows through the resistor R55, the resistor R54, the resistor R53, the resistor R51, the resistor R72 and the resistor R74, the triode Q11 is conducted, the control pin of the control chip U1 of the auxiliary power supply control circuit 4 is pulled low, the auxiliary power supply 5 stops working, and the standby loss of the whole system is reduced to the lowest.

To sum up, the utility model provides a black start circuit of energy storage converter, through setting up the start-up of reset switch circuit unified control energy storage converter, when reset switch circuit worked, optoelectronic coupler U25 switched on, and battery voltage supply circuit worked, made the first control circuit work of getting electricity to the auxiliary power supply start, the second control circuit was gone up to the electricity, and the converter start-up was accomplished, and the converter that does not have self-starting ability in the drive system starts, and then realizes the recovery of whole system; after the start-up is completed, the reset switch circuit does not work, the photoelectric coupler U25 is cut off, the battery voltage power supply circuit does not work, the first control circuit loses power and cannot work, and the auxiliary power supply stops working, so that the standby loss of the system is reduced to the minimum.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. The black start circuit of the energy storage converter is characterized by comprising a battery voltage power supply circuit, a reset switch circuit, a first control circuit, an auxiliary source control circuit, an auxiliary power source, a second control circuit and a photoelectric coupler U25, wherein a first end of the photoelectric coupler U25 is electrically connected with the battery voltage power supply circuit, a second end of the photoelectric coupler U25 is electrically connected with the reset switch circuit, a third end of the photoelectric coupler U25 is electrically connected with the first control circuit, the auxiliary source control circuit is respectively electrically connected with the first control circuit and the auxiliary power source, and the second control circuit is electrically connected with the auxiliary power source.

2. The black start circuit of the energy storage converter according to claim 1, wherein the battery voltage supply circuit comprises a resistor R443, a resistor R444, a resistor R445, a resistor R447, a resistor R448, a diode D83, a diode D86, an electrolytic capacitor EC212 and an electrolytic capacitor EC215, a first end of the photocoupler U25 is electrically connected with a cathode of the diode D86 and one end of the electrolytic capacitor EC215, respectively, the other end of the electrolytic capacitor EC215 is electrically connected with one end of the resistor R448, one end of the electrolytic capacitor EC212 and a cathode of the diode D83, respectively, the other end of the electrolytic capacitor EC212 is electrically connected with the resistor R448, the diode D86, a second end of the photocoupler U25 and the reset switch circuit, an anode of the diode D83 is electrically connected with one end of the resistor R445, the other end of the resistor R445 is electrically connected with one end of the resistor R444, and the other end of the resistor R447 is electrically connected with one end of the resistor R447, the other end of the resistor R447 is electrically connected to one end of the resistor R443.

3. The black start circuit of the energy storage converter according to claim 1, wherein the reset switch circuit comprises a resistor R459, a diode D81 and a reset switch S1, one end of the reset switch S1 is electrically connected to the cathode of the diode D81, and the anode of the diode D81 is electrically connected to the battery voltage supply circuit and the second end of the photocoupler U25.

4. The black start circuit of the energy storage converter according to claim 1, wherein the first control circuit comprises a resistor R51, a resistor R52, a resistor R53, a resistor R54, a resistor R55, a resistor R72, a resistor R74, a capacitor C45, a regulator tube ZD13 and a transistor Q11, the third end of the photocoupler U25 is electrically connected with one end of a resistor R52, the other end of the resistor R52 is electrically connected with the cathode of the regulator tube ZD 52, one end of the resistor R52 and one end of the resistor R52 respectively, the anode of the regulator tube ZD 52 is electrically connected with one end of the capacitor C52, one end of the resistor R52 and the emitter of the transistor Q52 respectively, the anode of the regulator tube ZD 52, one end of the capacitor C52, one end of the resistor R52 and the emitter of the transistor Q52 are all grounded, the other end of the resistor R52 is electrically connected with the other end of the capacitor C52, the base of the resistor R52 and the collector of the transistor Q52, the auxiliary transistor Q52 is electrically connected with the collector, the other end of the resistor R51 is electrically connected with one end of a resistor R53, the other end of the resistor R53 is electrically connected with one end of a resistor R54, and the other end of the resistor R54 is electrically connected with one end of a resistor R55.

5. The black start circuit of the energy storage converter according to claim 1, wherein the auxiliary power control circuit comprises a resistor R73, a resistor R76, a resistor R77, a resistor R78, a resistor R318, a resistor R321, a resistor R322, a capacitor C78, a diode D78 and a chip U78, wherein a first pin of the chip U78 is electrically connected to one end of the resistor R78 and one end of the capacitor C78, the other end of the resistor R78 is electrically connected to one end of the capacitor C78, the other end of the capacitor C78 is electrically connected to the other end of the capacitor C78, a second pin of the chip U78, one end of the resistor R78, one end of the capacitor C78 and one end of the capacitor C78, and one end of the third pin of the capacitor C78 and the other end of the capacitor C78 are electrically connected to one end of the capacitor C78, a fifth pin of the chip U6 is electrically connected to the other end of the capacitor C53, the other end of the resistor R76, the other end of the capacitor C52, the other end of the capacitor C48, the one end of the capacitor C46, the one end of the capacitor C47, the anode of the diode D53, and the anode of the diode D18, and the anode of the diode D18 is grounded, a sixth pin of the chip U6 is electrically connected to the cathode of the diode D18 and the one end of the resistor R73, a seventh pin of the chip U6 is electrically connected to the cathode of the capacitor C47 and the cathode of the diode D53, an eighth pin of the chip U6 is electrically connected to the other end of the capacitor C46 and the one end of the resistor R322, the other end of the resistor R322 is electrically connected to the one end of the resistor R321, and the other end of the resistor R321 is electrically connected to the fourth pin.