IEC61850 protocol conversion circuit

Abstract

The utility model relates to the technical field of IEC61850 protocol conversion, and discloses an IEC61850 protocol conversion circuit, which comprises a power supply unit, a main control unit, at least one network interface unit and at least one RS485 communication unit, the power supply unit is used for providing working voltage for the main control unit, all the network interface units and all the RS485 communication units; the main control unit is electrically connected with all the network interface units and all the RS485 communication units, and is used for performing IEC61850 protocol conversion on data sent by the network interface units and the RS485 communication units; in actual use, communication conversion between network communication and / or 485 communication and the IEC61850 protocol can be realized through the IEC61850 protocol converter, so that devices which support the network communication and the 485 communication but do not support the IEC61850 protocol in an electric power system can be accessed to an intelligent power grid through the IEC61850 protocol, the compatibility is good, and the control operation of the devices in the intelligent power grid is greatly facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to IEC61850 protocol conversion technical field, specifically related to a kind of IEC61850 protocol conversion circuit. BACKGROUND

[0002] IEC61850 standard is the global standard in the field of power system automation, aims at standardizing the communication between internal and each device of acrylic power station and substation automation system.The standard provides a common data model and abstraction layer for the monitoring, protection and control equipment of power system, supports the interoperability and communication between devices.

[0003] In practical application, IEC 61850 is mainly applied to power system management, including real-time monitoring of power grid, equipment state detection, protection measure execution, control command issuing, etc.It covers the communication protocol of devices inside substation, such as circuit breaker, transformer, measurement unit, to protection relay, controller, intelligent terminal (RTU), workstation, etc.

[0004] For existing circuit system, due to the protection devices such as circuit breaker and transformer in the system due to different manufacturers, there is a problem of incompatible IEC61850 standard protocol, which cannot be well integrated into modern smart grid, and cannot realize more efficient communication and control function CONTENT OF UTILITY MODEL

[0005] In view of the deficiencies of the background art, the utility model provides an IEC61850 protocol conversion circuit, so that the devices without IEC61850 standard protocol in power system can be accessed to modern smart grid system.

[0006] To solve the above technical problems, the utility model provides the following technical scheme: an IEC61850 protocol conversion circuit, comprising a power supply unit, a main control unit, at least one network interface unit and at least one RS485 communication unit;

[0007] The power supply unit is used to provide working voltage for the main control unit, all network interface units and all RS485 communication units.

[0008] The main control unit is electrically connected with all network interface units and all RS485 communication units, respectively, for IEC61850 protocol conversion of data sent by network interface unit and RS485 communication unit.

[0009] In some embodiments, the main control unit comprises a main control chip with model GX-IMX-61850.

[0010] In certain embodiments, the utility model includes two network interface units and two RS485 communication units, the master control unit is electrically connected with two network interface units and two RS485 communication units.

[0011] In certain embodiments, the network interface unit includes RJ45 interface of model HR911105A;

[0012] The fifth pin and the fourth pin of the RJ45 interface are electrically connected with one end of the resistor R1 and one end of the capacitor C9 respectively, the other end of the resistor R1 is electrically connected with the master control unit, and the other end of the capacitor C9 is grounded;

[0013] The sixth pin, the third pin, the second pin and the first pin of the RJ45 interface are electrically connected with the master control unit respectively;

[0014] The ninth pin of the RJ45 interface is connected with 3.3V DC voltage through the resistor R2, the tenth pin of the RJ45 interface is electrically connected with the collector of the transistor Q2, the base of the transistor Q2 is electrically connected with the master control unit, and is electrically connected with the collector of the transistor Q2 through the resistor R10, and the collector of the transistor Q2 is grounded;

[0015] The twelfth pin of the RJ45 interface is connected with 3.3V DC voltage through the resistor R3, the eleventh pin of the RJ45 interface is electrically connected with the collector of the transistor Q1, the base of the transistor Q1 is electrically connected with the master control unit, and is electrically connected with the collector of the transistor Q1 through the resistor R9, and the collector of the transistor Q1 is grounded.

[0016] In certain embodiments, the RS485 communication unit includes communication chip U2 of model ADM2483BRW;

[0017] The ninth pin of the communication chip U2 is grounded;

[0018] The twelfth pin of the communication chip U2 is electrically connected with one end of the resistor R5 and one end of the TVS diode VT1 respectively, the other end of the resistor R5 is used for inputting 5V DC working voltage, and the other end of the TVS diode VT1 is grounded;

[0019] The thirteenth pin of the communication chip U2 is electrically connected with one end of the resistor R12 and one end of the TVS diode VT2 respectively, the other end of the resistor R12 is grounded, and the other end of the TVS diode VT2 is grounded;

[0020] The fifteenth pin of the communication chip U2 is grounded;The sixteenth pin of the communication chip U2 is used for connecting 5V DC voltage, and is grounded through the capacitor C10;

[0021] The first pin of the communication chip U2 is used for inputting 3.3V DC voltage, and grounded through the capacitor C11;

[0022] The second pin of the communication chip U2 is grounded;

[0023] The third pin of the communication chip U2 is connected to 3.3V DC voltage through the resistor R11, and electrically connected to the main control unit;

[0024] The fourth pin of the communication chip U2 is electrically connected to the fifth pin of the communication chip U2, one end of the resistor R13 and the collector of the transistor Q3, and the other end of the resistor R13 is grounded;

[0025] The sixth pin of the communication chip U2 is electrically connected to one end of the resistor R6 and one end of the resistor R8, the other end of the resistor R8 is electrically connected to the base of the transistor Q3, and is electrically connected to the main control unit, the other end of the resistor R6 is electrically connected to the emitter of the transistor Q3, and inputs 3.3V DC voltage;

[0026] The seventh pin of the communication chip U2 is electrically connected to one end of the resistor R4 and one end of the resistor R7, the other end of the resistor R4 is used for inputting 3.3V DC voltage, and the other end of the resistor R7 is grounded; the eighth pin of the communication chip U2 is grounded.

[0027] In some embodiments, the power supply unit includes a voltage conversion unit and a voltage stabilizing unit, the voltage conversion unit is used for converting external voltage into 3.3V DC voltage, and the voltage stabilizing unit is used for converting external voltage into 5V DC voltage.

[0028] In some embodiments, the voltage conversion unit includes a voltage conversion chip U1 with model number AMS1117-3.3, the third pin of the voltage conversion chip U1 is used for inputting the external voltage, and is electrically connected to one end of the capacitor C1, one end of the capacitor C2, one end of the capacitor EC1, one end of the TVS diode TVS1, the cathode of the diode VD1 and one end of the fuse, respectively, the other end of the capacitor C1, the other end of the capacitor C2, the other end of the capacitor EC1, the other end of the TVS diode TVS1 and the anode of the diode VD1 are all grounded, and the other end of the fuse F1 inputs power supply voltage;

[0029] The first pin of the voltage conversion chip U1 is grounded; and the fourth pin of the voltage conversion chip U1 outputs the 3.3V DC voltage, and is grounded through the capacitor C3 and the capacitor C4, respectively.

[0030] In certain embodiments, the voltage stabilizing unit comprises a voltage stabilizing chip DC1 of model IB0505LS-1WR2, a No.1 pin of the voltage stabilizing chip DC1 is electrically connected with a No.3 pin of the voltage conversion chip U1, and is grounded through a capacitor C8 and a capacitor C7 respectively, a No.2 pin and a No.4 pin of the voltage stabilizing chip DC1 are grounded, and a No.6 pin of the voltage stabilizing chip DC1 is used for outputting the 5V direct current voltage and is grounded through a capacitor C6 and a capacitor C5 respectively.

[0031] In certain embodiments, the utility model further comprises a test network interface unit and a 232 communication unit, and the test network interface unit is electrically connected with the master control unit through the 232 communication unit.

[0032] In certain embodiments, the 232 communication unit comprises a communication chip U4 of model SP3232EEN.

[0033] The utility model has the beneficial effects that: in actual use, the network communication and / or 485 communication and IEC61850 protocol can be communicated and converted through the utility model, so that the devices in the power system which support network communication and 485 communication but do not support IEC61850 protocol can be accessed to the smart grid through IEC61850 protocol, and the utility model has good compatibility and greatly facilitates the control operation of the devices in the smart grid. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a structural schematic view of the utility model in the embodiment;

[0035] Figure 2 It is a circuit diagram of the master control unit in the embodiment;

[0036] Figure 3 It is a circuit diagram of the network interface unit in the embodiment;

[0037] Figure 4 It is a circuit diagram of the 485 communication unit in the embodiment;

[0038] Figure 5 It is a circuit diagram of the voltage conversion unit in the embodiment;

[0039] Figure 6 It is a circuit diagram of the voltage stabilizing unit in the embodiment;

[0040] Figure 7 It is a circuit diagram of the test network interface unit and the 232 communication unit in the embodiment. DETAILED DESCRIPTION

[0041] The utility model will be further described in detail in connection with the drawings. These drawings are all simplified schematic diagrams, and only schematically show the basic structure of the utility model, so they only show the structure related to the utility model.

[0042] As Figure 1 shown, an IEC61850 protocol conversion circuit, including power supply unit 1, main control unit 2, at least one network interface unit 3 and at least one RS485 communication unit 4;

[0043] Power supply unit 1 is used to provide working voltage for main control unit 2, all network interface units 3 and all RS485 communication units 4;

[0044] Main control unit 2 is electrically connected with all network interface units 3 and all RS485 communication units 4 respectively, and is used to carry out IEC61850 protocol conversion on the data sent by network interface unit 3 and RS485 communication unit 4.

[0045] In actual use, the network communication and / or 485 communication and IEC61850 protocol can be communicated and converted by the utility model, so that the devices in the power system that support network communication and 485 communication but do not support IEC61850 protocol can be accessed to the smart grid through IEC61850 protocol, and the compatibility is good and the control operation of the devices in the smart grid is greatly facilitated.

[0046] Specifically, in the embodiment, as Figure 2 shown, main control unit 2 includes main control chip with model GX-IMX-61850. In certain embodiments, main control unit 2 can also select other processing chips with operation processing function.

[0047] In the embodiment, the utility model includes two network interface units 3 and two RS485 communication units 4, and main control unit 2 is electrically connected with the two network interface units 3 and the two RS485 communication units 4. In certain embodiments, the remaining number of network interface units 3 and RS485 communication units 4 can be set according to actual needs, which is not limited here.

[0048] In the embodiment, as Figure 3 shown, network interface unit 3 includes RJ45 interface ETH2 with model HR911105A;

[0049] The fifth pin and the fourth pin of RJ45 interface ETH2 are electrically connected with one end of resistor R1 and one end of capacitor C9 respectively, the other end of resistor R1 is electrically connected with main control unit, and the other end of capacitor C9 is grounded;

[0050] Pins 6, 3, 2, and 1 of the RJ45 interface ETH2 are electrically connected to the main control unit 2 for data interaction.

[0051] Pin 9 of RJ45 interface ETH2 is connected to a 3.3V DC voltage through resistor R2. Pin 10 of RJ45 interface ETH2 is electrically connected to the collector of transistor Q2. The base of transistor Q2 is electrically connected to the main control unit and is electrically connected to the collector of transistor Q2 through resistor R10. The collector of transistor Q2 is grounded.

[0052] Pin 12 of the RJ45 interface ETH2 is connected to a 3.3V DC voltage through resistor R3. Pin 11 of the RJ45 interface ETH2 is electrically connected to the collector of transistor Q1. The base of transistor Q1 is electrically connected to the main control unit and is also electrically connected to the collector of transistor Q1 through resistor R9. The collector of transistor Q1 is grounded.

[0053] Specifically, in this embodiment, as Figure 4 As shown, RS485 communication unit 4 includes communication chip U2 of model ADM2483BRW;

[0054] Pin 9 of the communication chip U2 is grounded;

[0055] Pin 12 of the communication chip U2 is electrically connected to one end of resistor R5 and one end of TVS diode VT1, respectively. The other end of resistor R5 is used to input a 5V DC working voltage, and the other end of TVS diode VT1 is grounded.

[0056] Pin 13 of the communication chip U2 is electrically connected to one end of resistor R12 and one end of TVS diode VT2, respectively. The other end of resistor R12 is grounded, and the other end of TVS diode VT2 is grounded.

[0057] Pin 15 of the communication chip U2 is grounded; pin 16 of the communication chip U2 is used to connect to a 5V DC voltage and is grounded through capacitor C10.

[0058] Pin 1 of the communication chip U2 is used to input a 3.3V DC voltage and is grounded through capacitor C11;

[0059] Pin number 2 of the communication chip U2 is grounded;

[0060] Pin 3 of the communication chip U2 is connected to a 3.3V DC voltage through resistor R11 and is electrically connected to the main control unit 2;

[0061] Pin 4 of communication chip U2 is electrically connected to pin 5 of communication chip U2, one end of resistor R13 and the collector of transistor Q3, and the other end of resistor R13 is grounded.

[0062] Pin 6 of the communication chip U2 is electrically connected to one end of resistor R6 and one end of resistor R8 respectively. The other end of resistor R8 is electrically connected to the base of transistor Q3 and to the main control unit 2. The other end of resistor R6 is electrically connected to the emitter of transistor Q3 and is input with a 3.3V DC voltage.

[0063] Pin 7 of communication chip U2 is electrically connected to one end of resistor R4 and one end of resistor R7 respectively. The other end of resistor R4 is used to input 3.3V DC voltage, and the other end of resistor R7 is grounded. Pin 8 of communication chip U2 is grounded.

[0064] In this embodiment, the power supply unit 1 includes a voltage conversion unit and a voltage regulator unit. The voltage conversion unit is used to convert the external voltage into a 3.3V DC voltage, and the voltage regulator unit is used to convert the external voltage into a 5V DC voltage.

[0065] The circuit of the voltage conversion unit is as follows: Figure 5 As shown, it includes a voltage conversion chip U1 with model number AMS1117-3.3. The third pin of the voltage conversion chip U1 is used to input external voltage and is electrically connected to one end of capacitor C1, one end of capacitor C2, one end of capacitor EC1, one end of TVS diode TVS1, the cathode of diode VD1 and one end of fuse respectively. The other ends of capacitor C1, capacitor C2, capacitor EC1, TVS diode TVS1 and the anode of diode VD1 are all grounded. The other end of fuse F1 is input with power supply voltage.

[0066] Pin 1 of voltage conversion chip U1 is grounded; pin 4 of voltage conversion chip U1 outputs a 3.3V DC voltage, which is grounded through capacitors C3 and C4 respectively.

[0067] In this embodiment, the external voltage is a 5V DC voltage.

[0068] In one implementation, other types of voltage conversion chips can be selected to generate a 3.3V DC voltage.

[0069] In this embodiment, as Figure 6 The voltage regulator unit shown includes a voltage regulator chip DC1 with model number IB0505LS-1WR2. Pin 1 of the voltage regulator chip DC1 is electrically connected to pin 3 of the voltage conversion chip U1 and is grounded through capacitors C8 and C7 respectively. Pins 2 and 4 of the voltage regulator chip DC1 are grounded. Pin 6 of the voltage regulator chip DC1 is used to output a 5V DC voltage and is grounded through capacitors C6 and C5 respectively.

[0070] In the embodiment, the utility model still includes test network port unit 5 and 232 communication unit 6, test network port unit 5 is connected with main control unit 2 through 232 communication unit 6, and the circuit of test network port unit 5 and 232 communication unit 6 is as shown in Figure 7 Test network port unit 5 is the existing network interface, and 232 communication unit 6 includes communication chip U4 with model SP3232EEN.

[0071] In actual use, the circuit can be functionally tested by test network port unit 5 and 232 communication unit 6 to determine whether the performance meets the requirements.

[0072] According to the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content of the specification, and must be determined by the scope of the claims.

Claims

1. An IEC61850 protocol conversion circuit, characterized in that, It includes a power supply unit, a main control unit, at least one network interface unit, and at least one RS485 communication unit; The power supply unit is used to provide operating voltage for the main control unit, all network interface units and all RS485 communication units; The main control unit is electrically connected to all network interface units and all RS485 communication units respectively, and is used to perform IEC61850 protocol conversion on the data sent by the network interface units and RS485 communication units.

2. The IEC61850 protocol conversion circuit according to claim 1, characterized in that, The main control unit includes a main control chip with the model number GX-IMX-61850.

3. The IEC61850 protocol conversion circuit according to claim 1, characterized in that, It includes two network interface units and two RS485 communication units, and the main control unit is electrically connected to the two network interface units and the two RS485 communication units.

4. The IEC61850 protocol conversion circuit according to claim 3, characterized in that, The network interface unit includes an RJ45 interface of model HR911105A; Pins 5 and 4 of the RJ45 interface are electrically connected to one end of resistor R1 and one end of capacitor C9, respectively. The other end of resistor R1 is electrically connected to the main control unit, and the other end of capacitor C9 is grounded. Pins 6, 3, 2, and 1 of the RJ45 interface are electrically connected to the main control unit, respectively. Pin 9 of the RJ45 interface is connected to a 3.3V DC voltage through resistor R2. Pin 10 of the RJ45 interface is electrically connected to the collector of transistor Q2. The base of transistor Q2 is electrically connected to the main control unit and is electrically connected to the collector of transistor Q2 through resistor R10. The collector of transistor Q2 is grounded. Pin 12 of the RJ45 interface is connected to a 3.3V DC voltage through resistor R3. Pin 11 of the RJ45 interface is electrically connected to the collector of transistor Q1. The base of transistor Q1 is electrically connected to the main control unit and is also electrically connected to the collector of transistor Q1 through resistor R9. The collector of transistor Q1 is grounded.

5. The IEC61850 protocol conversion circuit according to claim 4, characterized in that, The RS485 communication unit includes a communication chip U2 with model number ADM2483BRW; Pin number nine of the communication chip U2 is grounded; Pin 12 of the communication chip U2 is electrically connected to one end of resistor R5 and one end of TVS diode VT1, respectively. The other end of resistor R5 is used to input a 5V DC working voltage, and the other end of TVS diode VT1 is grounded. Pin 13 of the communication chip U2 is electrically connected to one end of resistor R12 and one end of TVS diode VT2, respectively. The other end of resistor R12 is grounded, and the other end of TVS diode VT2 is grounded. Pin 15 of the communication chip U2 is grounded; pin 16 of the communication chip U2 is used to connect to a 5V DC voltage and is grounded through capacitor C10. Pin 1 of the communication chip U2 is used to input a 3.3V DC voltage and is grounded through capacitor C11; Pin number 2 of the communication chip U2 is grounded; The third pin of the communication chip U2 is connected to a 3.3V DC voltage through a resistor R11 and is electrically connected to the main control unit. The fourth pin of the communication chip U2 is electrically connected to the fifth pin of the communication chip U2, one end of resistor R13 and the collector of transistor Q3, and the other end of resistor R13 is grounded. The sixth pin of the communication chip U2 is electrically connected to one end of resistor R6 and one end of resistor R8 respectively. The other end of resistor R8 is electrically connected to the base of transistor Q3 and to the main control unit. The other end of resistor R6 is electrically connected to the emitter of transistor Q3 and is input with a 3.3V DC voltage. Pin 7 of the communication chip U2 is electrically connected to one end of resistor R4 and one end of resistor R7, respectively. The other end of resistor R4 is used to input a 3.3V DC voltage, and the other end of resistor R7 is grounded. Pin 8 of the communication chip U2 is grounded.

6. The IEC61850 protocol conversion circuit according to claim 5, characterized in that, The power supply unit includes a voltage conversion unit and a voltage regulator unit. The voltage conversion unit is used to convert the external voltage into a 3.3V DC voltage, and the voltage regulator unit is used to convert the external voltage into a 5V DC voltage.

7. The IEC61850 protocol conversion circuit according to claim 6, characterized in that, The voltage conversion unit includes a voltage conversion chip U1 of model AMS1117-3.

3. Pin 3 of the voltage conversion chip U1 is used to input the external voltage and is electrically connected to one end of capacitor C1, one end of capacitor C2, one end of capacitor EC1, one end of TVS diode TVS1, the cathode of diode VD1, and one end of fuse. The other ends of capacitor C1, capacitor C2, capacitor EC1, TVS diode TVS1, and diode VD1 are all grounded. The other end of fuse F1 is input with the power supply voltage. The voltage conversion chip U1 has its first pin grounded; the voltage conversion chip U1 has its fourth pin outputting the 3.3V DC voltage, which is grounded through capacitors C3 and C4 respectively.

8. The IEC61850 protocol conversion circuit according to claim 7, characterized in that, The voltage regulator unit includes a voltage regulator chip DC1 with model number IB0505LS-1WR2. Pin 1 of the voltage regulator chip DC1 is electrically connected to pin 3 of the voltage conversion chip U1 and is grounded through capacitors C8 and C7 respectively. Pins 2 and 4 of the voltage regulator chip DC1 are grounded. Pin 6 of the voltage regulator chip DC1 is used to output the 5V DC voltage and is grounded through capacitors C6 and C5 respectively.

9. The IEC61850 protocol conversion circuit according to claim 1, characterized in that, It also includes a test network port unit and a 232 communication unit, wherein the test network port unit is electrically connected to the main control unit through the 232 communication unit.

10. An IEC61850 protocol conversion circuit according to claim 9, characterized in that, The 232 communication unit includes a communication chip U4 with the model number SP3232EEN.

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