CN215378536U - Electric power alternating current-direct current integrated power supply system - Google Patents
Electric power alternating current-direct current integrated power supply system Download PDFInfo
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- CN215378536U CN215378536U CN202121837177.9U CN202121837177U CN215378536U CN 215378536 U CN215378536 U CN 215378536U CN 202121837177 U CN202121837177 U CN 202121837177U CN 215378536 U CN215378536 U CN 215378536U
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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Abstract
The utility model relates to the technical field of substations, and provides an electric power alternating-current and direct-current integrated power supply system which comprises a voltage monitoring chip U1, wherein the voltage monitoring chip U1 is connected with a central control unit for data transmission, a pin C of the voltage monitoring chip U1 is connected with the anode of a single storage battery P through a resistor R1, a pin S of the voltage monitoring chip U1 is connected with the source electrode of an MOS tube Q1 through a resistor R2, the grid electrode of the MOS tube Q1 is connected with the anode of the single storage battery P, and the drain electrode of the MOS tube Q1 is connected with the cathode of the single storage battery P through a resistor R3. The voltage of each single storage battery P in the storage battery pack is detected through the voltage monitoring chip U1, data are sent to the central control unit, communication is established with the terminal through the wireless module, and the running state of the storage battery pack is monitored in real time. And the MOS tube Q1 and the voltage monitoring chip U1 are used for releasing the electric quantity of the single storage battery P with the overhigh voltage, so that the voltage equilibrium state of each single storage battery P in the storage battery pack is ensured.
Description
Technical Field
The utility model relates to the technical field of transformer substations, in particular to an electric power alternating current and direct current integrated power supply system.
Background
The ac/DC integrated power supply system is a complete set of equipment that combines DC power supply, ac power supply (UPS), inverter power supply (INV), and DC/DC power supply for communication, shares the battery pack of the DC power supply, and performs unified monitoring. The appearance of the transformer substation alternating current-direct current integrated power supply system improves the safety performance of the power supply system and the intellectualization of a network, improves the management level of the transformer substation, and well improves the flexibility and the safety and reliability.
Therefore, the running state of the storage battery is the key for ensuring the reliable running of the alternating current-direct current integrated power supply system, if the state and the service life of the storage battery are not ensured, the storage battery will inevitably form great potential safety hazard to a power grid system, and meanwhile, a large number of storage batteries are scrapped in advance, so that serious waste of resources and funds is caused, and the environmental protection pressure is increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electric power alternating current and direct current integrated power supply system, which solves the problem that a plurality of single storage batteries of a storage battery pack in the electric power alternating current and direct current integrated power supply system have uneven voltage.
The technical scheme of the utility model is as follows:
the electric power alternating current-direct current integrated power supply system comprises a central control unit, a rectifying unit, an inverting unit, a DC/DC converting unit and a storage battery pack, wherein the central control unit is communicated with a terminal through a wireless module, the storage battery pack comprises a plurality of single storage batteries P, the storage battery pack is connected with three-phase alternating current through the rectifying unit, outputs an alternating current power supply for electric power through the inverting unit, the storage battery pack outputs a direct current power supply for communication through the DC/DC converting unit, the electric power supply system further comprises a voltage monitoring chip U1, a voltage monitoring chip U1 is connected with the central control unit for data transmission, a pin C of the voltage monitoring chip U1 is connected with the anode of the single storage battery P through a resistor R1, a pin S of the voltage monitoring chip U1 is connected with a source electrode of an MOS pipe Q1 after passing through a resistor R2, and a grid electrode of the MOS pipe Q1 is connected with the anode of the single storage battery P, the drain electrode of the MOS transistor Q1 is connected with the negative electrode of the single storage battery P through a resistor R3.
Further, the battery pack further comprises a voltage stabilizing diode D1 and a light emitting diode LED1, wherein the anode of the voltage stabilizing diode D1 is connected with the S pin of the voltage monitoring chip U1, the cathode of the voltage stabilizing diode D1 is connected with the C pin of the voltage monitoring chip U1, the anode of the light emitting diode LED1 is connected with the first end of a resistor R4, the second end of the resistor R4 is connected with the drain of the MOS transistor Q1, and the cathode of the light emitting diode LED1 is connected with the cathode of the single storage battery P. .
Further, the storage battery pack is connected with the rectifying unit through a voltage-stabilizing charging circuit, the voltage-stabilizing charging circuit comprises a comparator U6, resistors R22, R14, R20, R21 and triodes Q2 and Q3, the resistor R22 and the resistor R14 are connected between the output end of the rectifying unit and the ground in series, the resistor R20 and the resistor R21 are connected between the positive electrode of the storage battery pack and the ground in series, the same-direction input end of the comparator U6 is connected with the connection point of the resistor R22 and the resistor R14, the inverting input end of the comparator U6 is connected with the connection point of the resistor R20 and the resistor R21, the output end of the comparator U6 is connected with the base of a triode Q2 through a resistor R15, the emitter of the triode Q2 is grounded, the collector of the triode Q2 is connected with the output end of the rectifying unit through a resistor R17, the base of the triode Q3 is connected with the collector of the triode Q2, the emitter of the triode Q3 is connected with the output end of the rectifying unit through a resistor R18, the collector of the triode Q3 is connected with the anode of the storage battery through a resistor R19.
Further, the regulated charging circuit further comprises a diode D2 and a diode D3, the diode D2 is connected in series between the resistor R17 and the output end of the rectifying unit, the conducting direction of the diode D2 is directed to the resistor R17 by the rectifying unit, the diode D3 is connected in series between the resistor R19 and the battery pack, and the conducting direction is directed to the battery pack by the resistor R19.
Further, the wireless module comprises a 485 communication chip U2, isolators U3, U4 and U5, the input end of the isolator U3 is connected with the RO pin of the 485 communication chip U2, the output end of the isolator U3 is connected with the central control unit, the input end of the isolator U4 is connected with the central control unit, the output end of the isolator U4 is connected with the/RE pin of the 485 communication chip U2, the input end of the isolator U5 is connected with the central control unit, the output end of the isolator U5 is connected with the DI pin of the 485 communication chip U2, the DE pin of the 485 communication chip U2 is connected with the/RE pin, a resistor R11 is connected in parallel between A, B of the 485 communication chip U2, and the A, B pin of the 485 communication chip U2 establishes communication with a terminal through an interface H1.
The working principle and the beneficial effects of the utility model are as follows:
the utility model detects the voltage of each single storage battery P in the storage battery pack through the voltage monitoring chip U1, sends data to the central control unit, establishes communication with the terminal through the wireless module and monitors the running state of the storage battery pack in real time. And the MOS tube Q1 and the voltage monitoring chip U1 are used for releasing the electric quantity of the single storage battery P with overhigh voltage, so that the voltage equilibrium state of each single storage battery P in the storage battery pack is ensured, the stability and the safety of the storage battery pack are enhanced, and the reliable operation of the electric power alternating current and direct current integrated power supply system is ensured.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of the circuit of the present invention;
FIG. 2 is a circuit diagram of the regulated charging circuit of the present invention;
fig. 3 is a circuit diagram of a wireless module of the present invention.
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 inventive step, are intended to be within the scope of the present invention.
In the embodiment of the method, the first step,
the embodiment provides an electric power alternating current and direct current integrated power supply system,
as shown in fig. 1, the wireless communication system comprises a central control unit, a rectifying unit, an inverting unit, a DC/DC converting unit and a storage battery pack, wherein the central control unit communicates with a terminal through a wireless module, the storage battery pack comprises a plurality of single storage batteries P, the storage battery pack is connected with three-phase alternating current through the rectifying unit, the storage battery pack outputs alternating current power for power through the inverting unit, the storage battery pack outputs direct current power for communication through the DC/DC converting unit,
still include voltage monitoring chip U1, voltage monitoring chip U1 is connected with central control unit and carries out data transmission, voltage monitoring chip U1 'S C foot passes through resistance R1 and connects monomer battery P' S positive pole, voltage monitoring chip U1 'S S foot passes through resistance R2 back and connects MOS pipe Q1' S source electrode, MOS pipe Q1 'S gate is connected monomer battery P' S positive pole, MOS pipe Q1 'S drain electrode passes through resistance R3 and connects monomer battery P' S negative pole.
The battery pack further comprises a voltage stabilizing diode D1 and a light emitting diode LED1, the anode of the voltage stabilizing diode D1 is connected with the S pin of the voltage monitoring chip U1, the cathode of the voltage stabilizing diode D1 is connected with the C pin of the voltage monitoring chip U1, the anode of the light emitting diode LED1 is connected with the first end of a resistor R4, the second end of the resistor R4 is connected with the drain of the MOS transistor Q1, and the cathode of the light emitting diode LED1 is connected with the negative electrode of the single storage battery P.
Because the storage battery pack of the alternating current-direct current integrated transformer substation bears the power supply of a plurality of power supplies and comprises a plurality of single storage batteries P connected in series, differences exist between every two single storage batteries. With the increase of the working time of the storage battery pack, the inconsistency of parameters such as voltage, internal resistance and electric energy capacity among the single storage batteries is more obvious, which can seriously threaten the stability and safety of the storage battery pack. In order to eliminate the difference between each single storage battery, a voltage monitoring chip U1 is adopted, when voltage acquisition is carried out on each single storage battery P, when the voltage monitoring chip U1 detects the single storage battery P with overhigh voltage, the MOS transistor Q1 is controlled to be closed through an S pin, namely, an equalizing loop of the single storage battery P is conducted, and the discharge of high electric quantity is realized. In this embodiment, the external MOS transistor Q1 acts as a switch, and an MOS transistor built in the S pin of the voltage monitoring chip U1 is not used, because the heat generated by the single battery when the current is discharged is likely to exceed the bearing range of the chip, and an independent MOS transistor is used to protect the voltage monitoring chip U1 from being used safely and avoid unnecessary cost loss.
In this embodiment, the zener diode D1 is used to stabilize the detected voltage value of the battery cell P for collection, and the LED1 is used to remind the user that the battery cell P is in the current-discharging state.
Further, as shown in FIG. 2,
the storage battery pack is connected with the output end of the rectifying unit through a voltage-stabilizing charging circuit, the voltage-stabilizing charging circuit comprises a comparator U6, resistors R22, R14, R20, R21 and triodes Q2 and Q3, the resistors R22 and R14 are connected between the output end of the rectifying unit and the ground in series, the resistor R20 and the resistor R21 are connected between the positive electrode of the storage battery pack and the ground in series, the same-direction input end of the comparator U6 is connected with the connection point of the resistor R22 and the resistor R14, the inverting-phase input end of the comparator U6 is connected with the connection point of the resistor R20 and the resistor R21, the output end of the comparator U6 is connected with the base of a triode Q2 through a resistor R15, the emitter of the triode Q2 is grounded, the collector of the triode Q2 is connected with the output end of the rectifying unit through a resistor R17, the base of the triode Q3 is connected with the collector of the triode Q2, the emitter of the triode Q3 is connected with the output end of the rectifying unit through a resistor R18, the collector of the triode Q3 is connected with the anode of the storage battery through a resistor R19.
The stabilized voltage charging circuit further comprises a diode D2 and a diode D3, the diode D2 is connected between the resistor R17 and the output end of the rectifying unit in series, the conducting direction of the diode D2 is directed to the resistor R17 from the rectifying unit, the diode D3 is connected between the resistor R19 and the storage battery pack in series, and the conducting direction is directed to the storage battery pack from the resistor R19.
In this embodiment, the storage battery pack obtains the dc power from the rectifying unit through the voltage-stabilizing charging circuit to perform charging, so as to ensure the safety of the storage battery pack floating charge coil power and prolong the service life of the storage battery pack floating charge coil power. When the voltage of the storage battery pack does not reach the rated value, the comparator U6 outputs a high level to drive the triode Q2 to be conducted, the base voltage of the triode Q3 is pulled down, the triode Q3 is conducted along with the high level, and the storage battery pack is charged in a floating mode. When the voltage reaches a rated value, the comparator U6 outputs low level, the triode Q2 and the triode Q3 are both cut off, the charging is stopped, the automatic starting and automatic stopping are realized, and the electric energy state of the storage battery pack is reliably ensured. The diodes D2 and D3 both have the function of preventing reverse current, so that the reliability of the voltage-stabilizing charging circuit is enhanced.
Further, as shown in FIG. 3,
the wireless module comprises a 485 communication chip U2, an isolator U3, U4 and U5, wherein the input end of the isolator U3 is connected with the RO pin of the 485 communication chip U2, the output end of the isolator U3 is connected with a central control unit, the input end of the isolator U4 is connected with the central control unit, the output end of the isolator U4 is connected with the RE pin of the 485 communication chip U2, the input end of the isolator U5 is connected with the central control unit, the output end of the isolator U5 is connected with the DI pin of the 485 communication chip U2, the DE pin of the 485 communication chip U2 is connected with the RE pin, a resistor R11 is connected in parallel between A, B of the 485 communication chip U2, and the A, B pin of the 485 communication chip U2 is communicated with a terminal through an interface H1.
In this embodiment, the central control unit establishes a connection with the terminal through RS485 communication, and the staff directly communicates with the central control unit through RS485 at the terminal, reads the state parameters of the storage battery pack stored in the storage module of the central control unit, and analyzes the state of the storage battery pack.
The 485 communication chip U2 interface adopts the differential transmission mode, has certain anti common mode interference ability, but when the common mode voltage exceeds the ultimate receiving voltage of the 485 communication chip U2, namely is greater than +12V or less than-7V, the 485 communication chip U2 can not work normally any more, and even the chip can be burnt out in serious cases. In order to ensure the reliability, the optical coupling isolation is carried out between the central control unit and the 485 communication chip U2.
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 (5)
1. The electric power alternating current-direct current integrated power supply system comprises a central control unit, a rectifying unit, an inverting unit, a DC/DC converting unit and a storage battery pack, wherein the central control unit is communicated with a terminal through a wireless module, the storage battery pack comprises a plurality of single storage batteries P, the storage battery pack is connected with three-phase alternating current through the rectifying unit, the storage battery pack outputs alternating current power supply for electric power through the inverting unit, the storage battery pack outputs direct current power supply for communication through the DC/DC converting unit,
the voltage monitoring device is characterized by further comprising a voltage monitoring chip U1, the voltage monitoring chip U1 is connected with a central control unit for data transmission, a pin C of the voltage monitoring chip U1 is connected with the anode of the single storage battery P through a resistor R1, a pin S of the voltage monitoring chip U1 is connected with the grid electrode of the MOS tube Q1 after passing through a resistor R2, the source electrode of the MOS tube Q1 is connected with the anode of the single storage battery P, and the drain electrode of the MOS tube Q1 is connected with the cathode of the single storage battery P through a resistor R3.
2. The electric power alternating current-direct current integrated power supply system according to claim 1, further comprising a voltage regulator diode D1 and a light emitting diode LED1, wherein an anode of the voltage regulator diode D1 is connected to an S pin of a voltage monitoring chip U1, a cathode of the voltage regulator diode D1 is connected to a C pin of a voltage monitoring chip U1, an anode of the light emitting diode LED1 is connected to a first end of a resistor R4, a second end of the resistor R4 is connected to a drain of the MOS transistor Q1, and a cathode of the light emitting diode LED1 is connected to a cathode of the single storage battery P.
3. The electric power AC-DC integrated power supply system according to claim 1, wherein the battery pack is connected to the rectifying unit through a voltage-stabilizing charging circuit, the voltage-stabilizing charging circuit comprises a comparator U6, a resistor R22, a resistor R14, a resistor R20, a resistor R21, a transistor Q2 and a transistor Q3, the resistor R22 and the resistor R14 are connected in series between the output end of the rectifying unit and the ground, the resistor R20 and the resistor R21 are connected in series between the positive pole of the battery pack and the ground, the same-direction input end of the comparator U6 is connected with the connection point of the resistor R22 and the resistor R14, the inverting input end of the comparator U6 is connected with the connection point of the resistor R20 and the resistor R21, the output end of the comparator U6 is connected with the base of a transistor Q2 through a resistor R15, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected with the output end of the rectifying unit through a resistor R17, the base electrode of the triode Q3 is connected with the collector electrode of the triode Q2, the emitter electrode of the triode Q3 is connected with the output end of the rectifying unit through a resistor R18, and the collector electrode of the triode Q3 is connected with the positive electrode of the storage battery through a resistor R19.
4. The electric power AC-DC integrated power supply system according to claim 3, wherein the regulated charging circuit further comprises a diode D2 and a diode D3, the diode D2 is connected in series between the resistor R17 and the output end of the rectifying unit, the conducting direction of the diode D2 is directed to the resistor R17 by the rectifying unit, the diode D3 is connected in series between the resistor R19 and the storage battery pack, and the conducting direction is directed to the storage battery pack by the resistor R19.
5. The electric power alternating current-direct current integrated power supply system according to claim 1, wherein the wireless module comprises a 485 communication chip U2, an isolator U3, an isolator U4 and an isolator U5, the input end of the isolator U3 is connected with the RO pin of a 485 communication chip U2, the output end of the isolator U3 is connected with a central control unit, the input end of the isolator U4 is connected with the central control unit, the output end of the isolator U4 is connected with the RE pin of a 485 communication chip U2, the input end of the isolator U5 is connected with the central control unit, the output end of the isolator U5 is connected with the DI pin of the 485 communication chip U2, the DE pin of the 485 communication chip U2 is connected with the RE pin, a resistor R11 is connected in parallel between A, B of the 485 communication chip U2, and the A, B pin of the 485 communication chip U2 is communicated with a terminal through an interface H1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121837177.9U CN215378536U (en) | 2021-08-06 | 2021-08-06 | Electric power alternating current-direct current integrated power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121837177.9U CN215378536U (en) | 2021-08-06 | 2021-08-06 | Electric power alternating current-direct current integrated power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215378536U true CN215378536U (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121837177.9U Active CN215378536U (en) | 2021-08-06 | 2021-08-06 | Electric power alternating current-direct current integrated power supply system |
Country Status (1)
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| CN (1) | CN215378536U (en) |
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2021
- 2021-08-06 CN CN202121837177.9U patent/CN215378536U/en active Active
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