CN216566928U - Energy storage converter - Google Patents
Energy storage converter Download PDFInfo
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- CN216566928U CN216566928U CN202122633992.XU CN202122633992U CN216566928U CN 216566928 U CN216566928 U CN 216566928U CN 202122633992 U CN202122633992 U CN 202122633992U CN 216566928 U CN216566928 U CN 216566928U
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model belongs to the technical field of power equipment, and provides an energy storage converter which comprises a bidirectional AC/DC module and an energy storage capacitor which are connected with each other, wherein a bidirectional AC/DC circuit is connected with an alternating current power grid in parallel and used for supplying power to a load when the alternating current power grid is disconnected, and the energy storage converter also comprises a zero-cross detection circuit, a power grid voltage detection circuit and a relay control circuit which are connected with a main control chip, wherein the relay control circuit comprises a relay K1, and a normally open contact of the relay K1 is arranged between the alternating current power grid and the load. Through the technical scheme, the problem that after the power grid is recovered, impact is caused to the energy storage converter device in the process of re-connecting the circuit in the prior art is solved.
Description
Technical Field
The utility model belongs to the technical field of power equipment, and relates to an energy storage converter.
Background
The energy storage converter device can control the charging and discharging processes of the storage battery, performs alternating current-direct current conversion, and can directly supply power for alternating current loads under the condition of no power grid. And controlling the converter to charge or discharge the battery according to the symbol and the size of the power instruction, so as to realize the regulation of the active power and the reactive power of the power grid. At present, in the process of connecting a circuit after a power grid is recovered, impact can be caused on an energy storage converter device, and even the energy storage converter device is damaged.
SUMMERY OF THE UTILITY MODEL
The utility model provides an energy storage converter device, which solves the problem that the energy storage converter device is impacted in the process of switching in a circuit again after a power grid is recovered in the prior art.
The technical scheme of the utility model is realized as follows: comprises a bidirectional AC/DC module and an energy storage capacitor which are connected with each other, wherein the bidirectional AC/DC module is connected with an alternating current power grid in parallel and is used for supplying power to a load when the alternating current power grid is disconnected, and also comprises a zero-crossing detection circuit, a power grid voltage detection circuit and a relay control circuit which are all connected with a main control chip,
the relay control circuit comprises a relay K1, a normally open contact of the relay K1 is arranged between an alternating current grid and a load,
the zero-crossing detection circuit comprises a first rectification circuit, a triode Q1 and a triode Q2, wherein the input end of the first rectification circuit is connected with an L line of an alternating current power grid, the output end of the first rectification circuit is connected with the input end of a voltage division circuit, the output end of the voltage division circuit is connected with the base electrode of the triode Q2, the emitting electrode of the triode Q2 is grounded, the collecting electrode of the triode Q2 is connected with the output end of the first rectification circuit, the base electrode of the triode Q1 is connected with the collecting electrode of the triode Q2, the base electrode of the triode Q1 is also connected with the main control chip, the collecting electrode of the triode Q1 is connected with a power VCC, the emitting electrode of the triode Q1 is grounded, and the collecting electrode of the triode Q1 is used as the output end of the zero-crossing detection circuit and is connected with the main control chip.
Further, the voltage dividing circuit comprises a resistor R1 and a resistor R2 which are connected in series, one end of the resistor R1 is connected with the output end of the first rectifying circuit, one end of the resistor R2 is grounded, and the series point of the resistor R1 and the resistor R2 serves as the output end of the voltage dividing circuit.
Further, the rectifier circuit further comprises a diode D1, wherein the anode of the diode D1 is connected with the collector of the triode Q2, and the cathode of the diode D1 is connected with the output end of the first rectifying circuit.
Further, the first rectifying circuit comprises a diode D5 and a resistor R5 which are connected in sequence, the anode of the diode D5 is connected with an L line of an alternating current power grid, and one end of the resistor R5 is connected with the input end of the voltage division circuit.
Further, the power supply voltage stabilizing circuit comprises a second rectifying circuit, the second rectifying circuit comprises a diode D3 and a resistor R4 which are connected in sequence, the anode of the diode D3 is connected with an L line of an alternating current power grid, a capacitor C1 is connected between one end of the resistor R4 and the ground, voltage stabilizing tubes D4 are connected to two ends of the capacitor C1 in parallel, and the anode of the capacitor C1 forms the power supply VCC.
Further, the relay control circuit comprises an optical coupler U30 and a triode Q4 which are connected in sequence, the input end of the optical coupler U30 is connected with the main control chip, the collector of the triode Q4 is connected with one end of a relay K1 coil, and the other end of the relay K1 coil is connected with an isolation power supply +5V-Ex 1.
Further, the relay control circuit further comprises a power isolation chip U20, the input end of the power isolation chip U20 is connected with +5V of a power supply, and the output end of the power isolation chip U20 serves as an isolation power supply +5V-Ex 1.
The working principle and the beneficial effects of the utility model are as follows:
the bidirectional AC/DC circuit is connected with the alternating current power grid in parallel, when the alternating current power grid is normal, the alternating current power grid supplies power to a load, and meanwhile, the energy storage capacitor is charged through the bidirectional AC/DC circuit; when the alternating current power grid is powered off, the main control chip controls the normally open contact of the relay K1 to be disconnected through the relay control circuit, the connection between the alternating current power grid and the bidirectional AC/DC circuit is timely disconnected, the energy storage capacitor supplies power to the load through the bidirectional AC/DC circuit, and the normal work of the load is guaranteed.
The zero-crossing detection circuit is used for detecting the zero-crossing point of the alternating current power grid and outputting a synchronous pulse, and the main control chip detects the frequency of the alternating current power grid by detecting the frequency of the synchronous pulse; the power grid voltage detection circuit is used for detecting the power grid voltage, when the frequency and the voltage of the alternating current power grid are normal, the main control chip controls the normally open contact of the relay K1 to be closed at a forward zero crossing point, then the current direction of the bidirectional AC/DC circuit is controlled to be switched, the alternating current power grid supplies power to a load, and meanwhile, the alternating current power grid charges the energy storage capacitor through the bidirectional AC/DC circuit.
The working principle of the zero-crossing detection circuit is as follows: the voltage of an alternating current power grid, namely the voltage between an L line and an N line is rectified by a first rectifying circuit, then is divided by a voltage dividing circuit, is connected to the base electrode of a triode Q2, and a high-level signal is output to the base electrode of a triode Q1 by a main control chip; in the positive half cycle of the alternating current network voltage, the output end of the voltage division circuit provides bias voltage for the triode Q2, the triode Q2 is in a conducting state, the collector of the triode Q2 is grounded, the base of the triode Q1 is limited at a low level, the triode Q1 is not conducted, and the collector of the triode Q1 outputs a high level; in the negative half cycle of the ac grid voltage, due to the blocking effect of the diode D5, the output terminal of the voltage divider circuit is zero, the transistor Q2 is turned off, the transistor Q1 is turned on, and the collector of the transistor Q1 outputs a low level.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic block diagram of the circuit of the present invention;
FIG. 2 is a schematic diagram of a zero crossing detection circuit of the present invention;
FIG. 3 is a schematic diagram of a relay control circuit according to the present invention;
in the figure: 1 zero-crossing detection circuit and 2 relay control circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, the energy storage converter device of this embodiment includes a bidirectional AC/DC module and an energy storage capacitor, which are connected to each other, the bidirectional AC/DC module is connected in parallel with an AC power grid and is used to supply power to a load when the AC power grid is disconnected, and further includes a zero-cross detection circuit, a power grid voltage detection circuit and a relay control circuit, which are all connected to a main control chip,
the relay control circuit comprises a relay K1, a normally open contact of a relay K1 is arranged between an alternating current power grid and a load,
the zero-crossing detection circuit comprises a first rectification circuit, a triode Q1 and a triode Q2, the input end of the first rectification circuit is connected with an alternating current power grid L line, the output end of the first rectification circuit is connected with the input end of a voltage division circuit, the output end of the voltage division circuit is connected with the base electrode of the triode Q2, the emitting electrode of the triode Q2 is grounded, the collecting electrode of the triode Q2 is connected with the output end of the first rectification circuit, the base electrode of the triode Q1 is connected with the collecting electrode of the triode Q2, the base electrode of the triode Q1 is further connected with the main control chip, the collecting electrode of the triode Q1 is connected with the power VCC, the emitting electrode of the triode Q1 is grounded, the collecting electrode of the triode Q1 serves as the output end of the zero-crossing detection circuit, and the main control chip is connected.
In the embodiment, the bidirectional AC/DC circuit is connected with the alternating current power grid in parallel, when the alternating current power grid is normal, the alternating current power grid supplies power to the load, and meanwhile, the energy storage capacitor is charged through the bidirectional AC/DC circuit; when the alternating current power grid is powered off, the main control chip controls the normally open contact of the relay K1 to be disconnected through the relay control circuit, the connection between the alternating current power grid and the bidirectional AC/DC circuit is timely disconnected, the energy storage capacitor supplies power to the load through the bidirectional AC/DC circuit, and the normal work of the load is guaranteed.
The zero-crossing detection circuit is used for detecting the zero-crossing point of the alternating current power grid and outputting a synchronous pulse, and the main control chip detects the frequency of the alternating current power grid by detecting the frequency of the synchronous pulse; the power grid voltage detection circuit is used for detecting the power grid voltage, when the frequency and the voltage of the alternating current power grid are normal, the main control chip controls the normally open contact of the relay K1 to be closed at a forward zero crossing point, then the current direction of the bidirectional AC/DC circuit is controlled to be switched, the alternating current power grid supplies power to a load, and meanwhile, the alternating current power grid charges the energy storage capacitor through the bidirectional AC/DC circuit.
The working principle of the zero-crossing detection circuit is as follows: as shown in fig. 2, after the ac grid voltage, i.e., the voltage between the L line and the N line, is rectified by the first rectifying circuit, the output voltage is divided by the voltage dividing circuit, and is connected to the base of the transistor Q2, the main control chip outputs a high level signal to the base of the transistor Q1, in the positive half cycle of the ac grid voltage, the output end of the voltage dividing circuit provides a bias voltage for the transistor Q2, the transistor Q2 is in a conducting state, the collector of the transistor Q2 is grounded, the base of the transistor Q1 is limited at a low level, the transistor Q1 is not conducting, and the collector of the transistor Q1 outputs a high level; in the negative half cycle of the ac grid voltage, due to the blocking effect of the diode D5, the output terminal of the voltage divider circuit is zero, the transistor Q2 is turned off, the transistor Q1 is turned on, and the collector of the transistor Q1 outputs a low level.
It should be noted that the grid voltage detection circuit in this embodiment is a conventional circuit in the art, and is not described herein again.
Further, as shown in fig. 2, the voltage divider circuit includes a resistor R1 and a resistor R2 connected in series, one end of the resistor R1 is connected to the output terminal of the first rectifier circuit, one end of the resistor R2 is grounded, and the series point of the resistor R1 and the resistor R2 serves as the output terminal of the voltage divider circuit.
The voltage division circuit adopts a mode that a resistor R1 and a resistor R2 are connected in series for voltage division, and the circuit is simple in structure and reliable in operation.
Further, as shown in fig. 2, the rectifier further includes a diode D1, an anode of the diode D1 is connected to a base of the transistor Q1, and a cathode of the diode D1 is connected to the output terminal of the first rectifying circuit.
Diode D1 acts as a reverse cutoff to prevent the base potential of transistor Q1 from being pulled low at the zero crossing of the ac mains voltage.
Further, the first rectifying circuit comprises a diode D5 and a resistor R5 which are connected in sequence, the anode of the diode D5 is connected with the line L of the alternating current power grid, and one end of the resistor R5 is connected with the input end of the voltage division circuit.
After the voltage of the alternating current power grid is rectified by the diode D5 and reduced by the resistor R5, pulsating voltage is output to the input end of the voltage dividing circuit, the diode D5 is conducted in the positive half cycle of the alternating current power grid, the voltage of the alternating current power grid is connected to the input end of the voltage dividing circuit, the diode D5 is cut off in the negative half cycle of the alternating current power grid, and the voltage at the input end of the voltage dividing circuit is zero.
Further, the power supply further comprises a second rectifying circuit, the second rectifying circuit comprises a diode D3 and a resistor R4 which are sequentially connected, the anode of the diode D3 is connected with an L line of an alternating current power grid, a capacitor C1 is connected between one end of the resistor R4 and the ground, two ends of a capacitor C1 are connected with a voltage stabilizing tube D4 in parallel, and the anode of the capacitor C1 forms a power supply VCC.
The alternating current network voltage is rectified by a diode D3, reduced by a resistor R5, filtered by a capacitor C1, and then stabilized by a voltage stabilizing tube D4 to form a stable direct current power supply VCC.
Further, as shown in fig. 3, the relay control circuit 2 includes an optical coupler U30 and a transistor Q4 connected in sequence, an input end of the optical coupler U30 is connected with the main control chip, a collector of the transistor Q4 is connected with one end of a coil of the relay K1, and the other end of the coil of the relay K1 is connected with the isolation power supply +5V-Ex 1.
Further, as shown in fig. 3, the relay control circuit 2 further includes a power isolation chip U20, an input terminal of the power isolation chip U20 is connected to +5V of the power supply, and an output terminal of the power isolation chip U20 serves as an isolation power supply +5V-Ex 1.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The energy storage converter device comprises a bidirectional AC/DC module and an energy storage capacitor which are connected with each other, wherein the bidirectional AC/DC module is connected with an alternating current power grid in parallel and used for supplying power to a load when the alternating current power grid is disconnected, and the energy storage converter device is characterized in that: also comprises a zero-crossing detection circuit (1), a power grid voltage detection circuit and a relay control circuit (2) which are all connected with the main control chip,
the relay control circuit (2) comprises a relay K1, a normally open contact of the relay K1 is arranged between an alternating current network and a load,
the zero-crossing detection circuit (1) comprises a first rectifying circuit, a triode Q1 and a triode Q2, wherein the input end of the first rectifying circuit is connected with an L line of an alternating current power grid, the output end of the first rectifying circuit is connected with the input end of a voltage division circuit, the output end of the voltage division circuit is connected with the base electrode of the triode Q2, the emitting electrode of the triode Q2 is grounded, the collector electrode of the triode Q2 is connected with the output end of the first rectifying circuit,
the base of triode Q1 with triode Q2's collecting electrode is connected, triode Q1's base still with the main control chip is connected, triode Q1's collecting electrode is connected with power VCC, triode Q1's projecting pole ground connection, triode Q1's collecting electrode is regarded as the output of zero cross detection circuit (1), inserts the main control chip.
2. The energy storage converter device of claim 1, wherein: the voltage dividing circuit comprises a resistor R1 and a resistor R2 which are connected in series, one end of the resistor R1 is connected with the output end of the first rectifying circuit, one end of the resistor R2 is grounded, and the series point of the resistor R1 and the resistor R2 serves as the output end of the voltage dividing circuit.
3. The energy storage converter device of claim 1, wherein: the diode D1 is also included, the anode of the diode D1 is connected with the collector of the triode Q2, and the cathode of the diode D1 is connected with the output end of the first rectifying circuit.
4. The energy storage converter device of claim 1, wherein: the first rectifying circuit comprises a diode D5 and a resistor R5 which are connected in sequence, the anode of the diode D5 is connected with an L line of an alternating current power grid, and one end of the resistor R5 is connected with the input end of the voltage division circuit.
5. The energy storage converter device of claim 1, wherein: still include the second rectifier circuit, the second rectifier circuit is including diode D3 and the resistance R4 that connects gradually, diode D3's positive pole with alternating current network L line connection, be connected with electric capacity C1 between resistance R4's the one end and the ground, electric capacity C1 both ends have parallelly connected stabilivolt D4, electric capacity C1's positive pole forms the power VCC.
6. The energy storage converter device of claim 1, wherein: the relay control circuit (2) is including optical coupler U30 and triode Q4 that connect gradually, optical coupler U30's input with main control chip connects, triode Q4's collecting electrode with the one end of relay K1 coil is connected, the other end and the isolation power supply +5V-Ex1 of relay K1 coil are connected.
7. The energy storage converter device of claim 6, wherein: the relay control circuit (2) further comprises a power isolation chip U20, the input end of the power isolation chip U20 is connected with +5V of a power supply, and the output end of the power isolation chip U20 serves as an isolation power supply +5V-Ex 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122633992.XU CN216566928U (en) | 2021-10-29 | 2021-10-29 | Energy storage converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122633992.XU CN216566928U (en) | 2021-10-29 | 2021-10-29 | Energy storage converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216566928U true CN216566928U (en) | 2022-05-20 |
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ID=81592426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122633992.XU Active CN216566928U (en) | 2021-10-29 | 2021-10-29 | Energy storage converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216566928U (en) |
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2021
- 2021-10-29 CN CN202122633992.XU patent/CN216566928U/en active Active
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