DTU power supply system

Abstract

The utility model provides a DTU power supply system, and the system comprises an isolation power supply circuit which is provided with a first DC input end and a first DC output end, and is used for converting a DC voltage of the first DC input end into a stable DC voltage, and outputting the stable DC voltage from the first DC output end; the energy storage booster circuit is provided with a second direct-current input end and a second direct-current output end, the second direct-current input end is connected with the first direct-current output end, the energy storage booster circuit comprises a super capacitor and a synchronous boosting module, and the super capacitor is connected with the first end of the synchronous boosting module and the second direct-current input end; the second end of the synchronous boost module is connected with the second DC input end, and the third end of the synchronous boost module is connected with the fourth end of the synchronous boost module and the second DC output end. And the auxiliary power supply circuit is connected with the second direct current output end. When the power supply is abnormal, the power supply supplies power to the synchronous boosting module through the super capacitor, so that the power supply is supplied to the system through the second direct current output end, and the anti-drop voltage-stabilizing DTU power supply system is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric power, in particular to a DTU power supply system. BACKGROUND

[0002] In the related art, as a key device in the distribution network, the data transfer unit (DTU) undertakes important tasks such as electrical parameter collection (such as remote signaling, voltage, current, power, etc.), switch opening and closing operation execution, fault handling and regional power supply recovery. However, in actual application, the DTU faces the risk of misoperation and refusal to operate caused by unstable external power supply (such as power supply drop and interruption), which threatens the safety of the distribution network. The traditional DTU power supply design usually relies on 1 group (5V) or 2 groups (5V+24V) of isolated power supply modules, and uses a 1000 When the external power supply voltage drops for a short time, the design will cause the supply voltage to fluctuate, which will cause the system to be unstable, and may cause the system to reset and restart, ADC sampling error, communication interruption and other adverse consequences. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a DTU power supply system, which aims to realize an anti-drop and stable voltage DTU power supply system.

[0004] In a first aspect, the embodiments of the present application provide a DTU power supply system, comprising:

[0005] An isolated power supply circuit is provided with a first DC input end and a first DC output end, and is used to convert the DC voltage of the first DC input end into a stable DC voltage and output from the first DC output end;

[0006] An energy storage and voltage boosting circuit is provided with a second DC input end and a second DC output end, the second DC input end is connected with the first DC output end, and the energy storage and voltage boosting circuit comprises a super capacitor and a synchronous voltage boosting module, the super capacitor is connected with the first end of the synchronous voltage boosting module and the second DC input end respectively, the second end of the synchronous voltage boosting module is connected with the second DC input end, and the third end of the synchronous voltage boosting module is connected with the fourth end of the synchronous voltage boosting module and the second DC output end respectively;

[0007] An auxiliary power supply circuit is connected with the second DC output end.

[0008] According to some embodiments of the present application, the energy storage and voltage boosting circuit further comprises:

[0009] A first resistor and a first inductor;

[0010] The super capacitor is connected with the second DC input end through the first resistor, and the first end of the synchronous boost module is connected with the second DC input end through the first inductor.

[0011] According to some embodiments of the present application, the energy storage boost circuit further comprises:

[0012] a second resistor and a signal output end;

[0013] The fifth end of the synchronous boost module is connected with the signal output end through the second resistor.

[0014] According to some embodiments of the present application, the DTU power supply system further comprises:

[0015] a controller;

[0016] The controller is connected with the signal output end, receives the signal of the signal output end, and outputs the working state of the DTU power supply system.

[0017] According to some embodiments of the present application, the energy storage boost circuit further comprises:

[0018] a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first transistor, a second transistor, a first capacitor and a second capacitor;

[0019] One end of the third resistor is connected with the second DC input end, and the other end is connected with the ground through the fourth resistor; one end of the first transistor is connected between the first resistor and the super capacitor, and the other end is connected with the second DC input end; one end of the fifth resistor is connected between the third resistor and the fourth resistor, and the other end is connected with the second resistor through the second transistor; one end of the sixth resistor is connected with the second DC input end, and the other end is connected with the second resistor; one end of the first capacitor and the second capacitor is respectively connected with the first inductor, and the other end is connected with the ground.

[0020] According to some embodiments of the present application, the energy storage boost circuit further comprises:

[0021] a seventh resistor, an eighth resistor, a third capacitor, a fourth capacitor, a fifth capacitor and a sixth capacitor;

[0022] One end of the seventh resistor is connected with the second DC output end, and the other end is connected with the ground through the eighth resistor; one end of the third capacitor is connected with the second DC output end, and the other end is connected with the sixth end of the synchronous boost module; one end of the fourth capacitor, the fifth capacitor and the sixth capacitor is respectively connected with the second DC output end, and the other end is connected with the ground.

[0023] According to some embodiments of the present application, the seventh end of the synchronous boost module and the eighth end of the synchronous boost module are connected with the ground through the fourth resistor.

[0024] According to some embodiments of the present application, the isolated power supply circuit comprises:

[0025] a filter network and a first DC / DC module;

[0026] The filter network is connected with the first DC / DC module and the first DC input end respectively, and the first DC / DC module is connected with the first DC output end.

[0027] According to some embodiments of the present application, the auxiliary power supply circuit is provided with a third DC input end and a third DC output end, and the third DC input end is connected with the second DC output end and the third DC output end respectively.

[0028] According to some embodiments of the present application, the auxiliary power supply circuit comprises:

[0029] a second DC / DC module;

[0030] The third DC input end is connected with the third DC output end through the second DC / DC module.

[0031] The technical scheme according to the embodiments of the present application has at least the following beneficial effects: the embodiments of the present application propose a DTU power supply system, which comprises: an isolated power supply circuit provided with a first DC input end and a first DC output end, for converting the DC voltage of the first DC input end into a stable DC voltage and outputting from the first DC output end; an energy storage boost circuit provided with a second DC input end and a second DC output end, the second DC input end being connected with the first DC output end, the energy storage boost circuit comprising a super capacitor and a synchronous boost module, the super capacitor being connected with the first end of the synchronous boost module and the second DC input end respectively, the second end of the synchronous boost module being connected with the second DC input end, the third end of the synchronous boost module being connected with the fourth end of the synchronous boost module and the second DC output end respectively; an auxiliary power supply circuit connected with the second DC output end. In the case of abnormality of the power supply, the super capacitor supplies power to the synchronous boost module, thereby supplying power to the system through the second DC output end, and realizing the DTU power supply system with anti-dropping voltage stabilization.

[0032] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following introduces the drawings needed to be used in the embodiments of the utility model, and it should be understood that the drawings in the following introduction are only for the convenience of clearly expressing part of the embodiments in the technical scheme of the utility model, and for the person skilled in the art, other drawings can also be obtained according to these drawings without creative labor. The utility model is further illustrated below in combination with the drawings and embodiments:

[0034] Figure 1 It is the structural schematic diagram of the DTU power supply system provided in an embodiment of the application;

[0035] Figure 2 It is the circuit schematic diagram of the energy storage boost circuit provided in an embodiment of the application;

[0036] Figure 3 It is the circuit schematic diagram of the isolation power supply circuit provided in an embodiment of the application;

[0037] Figure 4 It is the circuit schematic diagram of the auxiliary power supply circuit provided in an embodiment of the application. DETAILED DESCRIPTION

[0038] The embodiments of the application are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the application, and cannot be understood as the limitation of the application.

[0039] In the description of the application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as the limitation of the application.

[0040] In the description of the utility model, the meaning of several is one or more, and the meaning of multiple is two or more, greater than, less than, more than, etc. is understood as not including the number, and above, below, etc. is understood as including the number. If the first and the second are described, they are only used for distinguishing the technical features for the purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0041] In the utility model, unless another definite provision and limitation, the terms such as " install " " connect " " connection " " fixed " should be understood broadly, for example, can be fixed connection, can be detachable connection, or be integrated;Can be mechanical connection, can be electrical connection;Can be directly connected, can be indirectly connected through intermediate medium, can be the communication or the interaction of two elements of two elements, unless another definite limitation.For ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0042] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the present specification, the illustrative description of the above-mentioned terms is not necessarily for the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of different embodiments or examples without contradiction.

[0043] In some cases, as a key equipment in power distribution network, data transfer unit (DTU) undertakes important tasks such as electrical parameter acquisition (such as remote signaling, voltage, current, power, etc.), switch opening and closing operation execution, fault handling and regional power supply recovery.However, in practical application, DTU faces the misoperation, refusal accident caused by external power supply instability (such as power supply drop, interruption, etc.), which threatens the safety of power distribution network.The traditional DTU power supply design usually relies on 1 group (5V) or 2 groups (5V+24V) of isolated power supply modules, and uses 1000 Class capacitor for filtering.But this design will cause power supply voltage fluctuation when the external power supply voltage drops for a short time, which will cause system instability, and may cause system reset, ADC sampling error, communication interruption and other adverse consequences.

[0044] Based on the above situation, the present application provides a DTU power supply system, which aims to realize the DTU power supply system against drop.

[0045] The various embodiments of the DTU power supply system of the present application will be further described below in conjunction with the drawings.

[0046] As Figure 1 shown, Figure 1 is the structure schematic diagram of the DTU power supply system provided by an embodiment of the present application.

[0047] In an embodiment, the DTU power supply system comprises an isolated power supply circuit 100, an energy storage and voltage boosting circuit 200, and an auxiliary power supply circuit 300.

[0048] It can be understood that the isolated power supply circuit 100 is provided with a first DC input end and a first DC output end, for converting the DC voltage of the first DC input end into a stable DC voltage and outputting from the first DC output end.

[0049] It can be understood that the energy storage and voltage boosting circuit 200 is provided with a second DC input end and a second DC output end, the second DC input end is connected with the first DC output end, the energy storage and voltage boosting circuit 200 comprises a super capacitor C0 and a synchronous voltage boosting module U1, the super capacitor is connected with the first end of the synchronous voltage boosting module and the second DC input end respectively, the second end of the synchronous voltage boosting module is connected with the second DC input end, and the third end of the synchronous voltage boosting module is connected with the fourth end of the synchronous voltage boosting module and the second DC output end respectively.

[0050] It can be understood that the auxiliary power supply circuit 300 is connected with the second DC output end.

[0051] It is worth noting that in the case of abnormal power supply, the super capacitor supplies power to the synchronous voltage boosting module, thereby supplying power to the system through the second DC output end, and realizing the DTU power supply system with anti-dropping voltage stabilization.

[0052] It can be understood that when the DC voltage output from the first DC output end is 5V, the DC voltage charges the super capacitor through the second DC input end, and supplies power to the system after being stabilized by the synchronous voltage boosting module. When the DC voltage of the first DC input end fluctuates or drops, the voltage of the second DC input end will appear short-term voltage loss, at this time, the synchronous voltage boosting module will detect the power supply abnormality and provide voltage to the synchronous voltage boosting module through the super capacitor.

[0053] It can be understood that as long as the voltage of the super capacitor is within the range of 2.5V-5V, the synchronous voltage boosting module can output stable 5V power supply.

[0054] As shown in Figure 2 , the circuit schematic diagram of the energy storage and voltage boosting circuit is provided in an embodiment of the present application. Figure 2

[0055] In addition, in an embodiment, the energy storage and voltage boosting circuit 200 further comprises a first resistor R1 and a first inductor L1.

[0056] It can be understood that the super capacitor is connected with the second DC input end through the first resistor R1, and the first end of the synchronous voltage boosting module is connected with the second DC input end through the first inductor L1. ​

[0057] It can be understood that when the DC voltage output by the first DC output end is 5V, the DC voltage charges the super capacitor through the second DC input end and the first resistor R1, and supplies power to the system after being stabilized through the first inductor L1 and the synchronous boost module. When the DC voltage of the first DC input end fluctuates or drops, the voltage of the second DC input end will appear short-term voltage loss. At this time, the synchronous boost module will detect the power supply abnormality and provide voltage for the synchronous boost module through the super capacitor.

[0058] In addition, in an embodiment, the energy storage boost circuit 200 further comprises a second resistor R2 and a signal output end.

[0059] It can be understood that the fifth end of the synchronous boost module is connected with the signal output end through the second resistor R2.

[0060] It can be understood that when the DC voltage of the first DC input end fluctuates or drops, the voltage of the second DC input end will also appear short-term voltage loss. At this time, the synchronous boost module will detect the power supply abnormality and output the power supply abnormality indication through the signal output end.

[0061] In addition, in an embodiment, the DTU power supply system further comprises a controller (not shown in the figure).

[0062] It can be understood that the controller is connected with the signal output end, for receiving the signal of the signal output end and outputting the working state of the DTU power supply system.

[0063] It can be understood that when the DC voltage of the first DC input end fluctuates or drops, the voltage of the second DC input end will also appear short-term voltage loss. At this time, the synchronous boost module will detect the power supply abnormality and output the power supply abnormality indication to the controller through the signal output end, and also provide voltage for the synchronous boost module through the super capacitor. Therefore, the controller has enough time to make corresponding processing after receiving the power supply abnormality indication, so that the occurrence of adverse events such as data loss and mis-trip caused by unstable, dropped and lost voltage of the power supply can be effectively avoided.

[0064] In addition, in an embodiment, the energy storage boost circuit 200 further comprises a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first transistor D1, a second transistor D2, a first capacitor C1 and a second capacitor C2.

[0065] It can be understood that one end of the third resistor R3 is connected with the second DC input end, and the other end is connected with the ground through the fourth resistor R4; one end of the first transistor D1 is connected between the first resistor R1 and the super capacitor, and the other end is connected with the second DC input end; one end of the fifth resistor R5 is connected between the third resistor R3 and the fourth resistor R4, and the other end is connected with the second resistor R2 through the second transistor D2; one end of the sixth resistor R6 is connected with the second DC input end, and the other end is connected with the second resistor R2; one end of the first capacitor C1 and the second capacitor C2 is respectively connected with the first inductor L1, and the other end is connected with the ground.

[0066] It can be understood that the first transistor D1 and the second transistor D2 described above can be selected from a Schottky diode, which has the advantages of low impedance, small forward voltage drop and fast recovery speed, and can be used in high-frequency large-current rectification and voltage protection circuit, or can be selected from a rectifier diode, a diode thyristor, etc. The types of the first transistor D1 and the second transistor D2 can be selected according to actual needs, and are not specifically limited here.

[0067] It can be understood that the first capacitor C1 and the second capacitor C2 described above refer to capacitors that can be charged and discharged. Capacitors are mainly divided into aluminum electrolytic capacitors, ceramic capacitors, mica capacitors, etc. Among them, the aluminum electrolytic capacitor has the characteristics of large capacity and positive and negative polarity, and is suitable for power filtering or low-frequency circuits; the ceramic capacitor has the characteristics of small size, good heat resistance, small loss, high insulation resistance, but small capacity, and is suitable for high-frequency circuits; the mica capacitor has the characteristics of small dielectric loss, large insulation resistance, and small temperature coefficient, and is suitable for high-frequency circuits. The types of the first capacitor C1 and the second capacitor C2 described above can be selected according to actual conditions, and are not specifically limited here.

[0068] In addition, in an embodiment, the energy storage voltage boosting circuit 200 further comprises a seventh resistor R7, an eighth resistor R8, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5 and a sixth capacitor C6.

[0069] It can be understood that one end of the seventh resistor R7 is connected with the second DC output end, and the other end is connected with the ground through the eighth resistor R8; one end of the third capacitor C3 is connected with the second DC output end, and the other end is connected with the sixth end of the synchronous voltage boosting module; one end of the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 is respectively connected with the second DC output end, and the other end is connected with the ground.

[0070] It is understood that the capacitors C3, C4, C5, and C6 mentioned above refer to capacitors capable of charging and discharging. Capacitors are mainly classified into aluminum electrolytic capacitors, ceramic capacitors, and mica capacitors. Aluminum electrolytic capacitors are characterized by large capacitance and positive / negative polarity, making them suitable for power supply filtering or low-frequency circuits. Ceramic capacitors are characterized by small size, good heat resistance, low loss, and high insulation resistance, but small capacitance, making them suitable for high-frequency circuits. Mica capacitors are characterized by low dielectric loss, high insulation resistance, and a small temperature coefficient, making them suitable for high-frequency circuits. The types of capacitors C3, C4, C5, and C6 mentioned above can be selected according to the actual situation and are not specifically limited here.

[0071] It is understandable that the seventh and eighth terminals of the synchronous boost module are connected to ground through the fourth resistor R4.

[0072] like Figure 3 As shown, Figure 3 This is a circuit diagram of an isolated power supply circuit provided in one embodiment of this application.

[0073] In another embodiment, the isolated power supply circuit 100 includes a filter network 110 and a first DC / DC module 120.

[0074] It is understood that the filter network 110 is connected to the first DC input terminal and the first DC / DC module 120, respectively, and the first DC / DC module 120 is connected to the first DC output terminal.

[0075] It is understandable that the DC voltage at the first DC input terminal is converted into a stable DC voltage by the first DC / DC module 120 after passing through the filter network 110.

[0076] like Figure 4 As shown, Figure 4 This is a circuit diagram of an auxiliary power supply circuit provided in one embodiment of this application.

[0077] In another embodiment, the auxiliary power supply circuit 300 is provided with a third DC input terminal and a third DC output terminal, the third DC input terminal being connected to the second DC output terminal and the third DC output terminal respectively.

[0078] Understandably, the voltage at the second DC output terminal enters the auxiliary power supply circuit 300 through the third DC input terminal, thereby ensuring that the auxiliary power supply circuit 300 is not affected by input power fluctuations and power drops.

[0079] In another embodiment, the auxiliary power supply circuit 300 includes a second DC / DC module 310.

[0080] It can be understood that the third DC input end is connected with the third DC output end through the second DC / DC module 310.

[0081] The above is a specific description of the preferred embodiment of the application, but the application is not limited to the above-mentioned embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the application. These equivalent modifications or replacements are all included in the scope defined by the claims of the application.

Claims

1. A DTU power supply system, characterized in that, include: An isolated power supply circuit is provided with a first DC input terminal and a first DC output terminal, which is used to convert the DC voltage at the first DC input terminal into a stable DC voltage and output it from the first DC output terminal; An energy storage boost circuit is provided with a second DC input terminal and a second DC output terminal. The second DC input terminal is connected to the first DC output terminal. The energy storage boost circuit includes a supercapacitor and a synchronous boost module. The supercapacitor is connected to a first terminal and the second DC input terminal of the synchronous boost module, respectively. The second terminal of the synchronous boost module is connected to the second DC input terminal, and the third terminal of the synchronous boost module is connected to a fourth terminal and the second DC output terminal, respectively. An auxiliary power supply circuit is connected to the second DC output terminal.

2. The DTU power supply system according to claim 1, characterized in that, The energy storage boost circuit also includes: First resistor and first inductor; The supercapacitor is connected to the second DC input terminal through the first resistor, and the first terminal of the synchronous boost module is connected to the second DC input terminal through the first inductor.

3. The DTU power supply system according to claim 2, characterized in that, The energy storage boost circuit also includes: Second resistor and signal output terminal; The fifth terminal of the synchronous boost module is connected to the signal output terminal through the second resistor.

4. The DTU power supply system according to claim 3, characterized in that, The DTU power system also includes: Controller; The controller is connected to the signal output terminal and is used to receive the signal from the signal output terminal and output the operating status of the DTU power system.

5. The DTU power supply system according to claim 3, characterized in that, The energy storage boost circuit also includes: Third resistor, fourth resistor, fifth resistor, sixth resistor, first transistor, second transistor, first capacitor and second capacitor; One end of the third resistor is connected to the second DC input terminal, and the other end is connected to ground through the fourth resistor; one end of the first transistor is connected between the first resistor and the supercapacitor, and the other end is connected to the second DC input terminal; one end of the fifth resistor is connected between the third resistor and the fourth resistor, and the other end is connected to the second resistor through the second transistor; one end of the sixth resistor is connected to the second DC input terminal, and the other end is connected to the second resistor; one end of the first capacitor and the second capacitor are respectively connected to the first inductor, and the other end is connected to ground.

6. The DTU power supply system according to claim 5, characterized in that, The energy storage boost circuit also includes: The seventh resistor, the eighth resistor, the third capacitor, the fourth capacitor, the fifth capacitor, and the sixth capacitor; One end of the seventh resistor is connected to the second DC output terminal, and the other end is connected to ground through the eighth resistor; one end of the third capacitor is connected to the second DC output terminal, and the other end is connected to the sixth terminal of the synchronous boost module; one end of the fourth capacitor, the fifth capacitor, and the sixth capacitor are respectively connected to the second DC output terminal, and the other end is connected to ground.

7. The DTU power supply system according to claim 6, characterized in that, The seventh and eighth terminals of the synchronous boost module are connected to ground through the fourth resistor.

8. The DTU power supply system according to claim 1, characterized in that, The isolated power supply circuit includes: Filtering network and first DC / DC module; The filter network is connected to the first DC input terminal and the first DC / DC module, respectively, and the first DC / DC module is connected to the first DC output terminal.

9. The DTU power supply system according to claim 1, characterized in that, The auxiliary power supply circuit is provided with a third DC input terminal and a third DC output terminal, and the third DC input terminal is connected to the second DC output terminal and the third DC output terminal respectively.

10. The DTU power supply system according to claim 9, characterized in that, The auxiliary power supply circuit includes: Second DC / DC module; The third DC input terminal is connected to the third DC output terminal through the second DC / DC module.

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