Distribution automation test equipment based on transformer substation

Abstract

The utility model relates to power distribution automation test equipment based on a transformer station. The power distribution automation test equipment comprises a portable suitcase, a test circuit board arranged in the portable suitcase and an interface embedded in the surface of the portable suitcase. A central processing circuit, a current testing circuit, a voltage testing circuit, a switching value testing circuit and a communication state testing circuit are integrated on the testing circuit board, and the input ends of the current testing circuit, the voltage testing circuit, the switching value testing circuit and the communication state testing circuit are connected with the corresponding interfaces. The output ends of the current test circuit, the voltage test circuit, the switching value test circuit and the communication state test circuit are connected with the central processing circuit. According to the utility model, current detection, voltage detection, switching value detection and communication state detection are integrated, so that the distribution automation terminal can be comprehensively detected; through the interface, wiring is simple and is not easy to make mistakes, so that the working efficiency is improved, and the detection quality and the personal and equipment safety are ensured.

Description

Technical Field

[0001] The utility model relates to the field of substations, and particularly to a distribution automation test device based on a substation. Background Art

[0002] With the development of the national economy, the demand for electricity is becoming more and more vigorous, and at the same time, the requirements for power quality and power supply reliability are getting higher and higher. Distribution automation is an inevitable direction for the future development of distribution networks, and the reliable operation of distribution automation systems is an important foundation for the healthy development of distribution networks. In order to ensure the high operation quality and good interconnection of distribution automation terminals, it is very necessary to conduct functional tests on distribution automation terminals before they are connected to the network in the construction of smart grids.

[0003] At present, in the power system, there is no special equipment for conducting full inspections on distribution automation terminals. Maintenance personnel mostly use self-made temporary detection tools to conduct full inspections on terminals. The instruments and cables they use are numerous and of various models. Each time before conducting a full inspection, they need to assemble the temporary detection tools on site, which is time-consuming and laborious, greatly reducing work efficiency; at the same time, due to different terminal definitions, wiring errors are likely to occur during secondary wiring work, affecting the quality of full inspections, and operational mistakes are extremely likely to endanger the safety of personnel and equipment. Summary of the Utility Model

[0004] The utility model provides a distribution automation test device based on a substation to solve at least one of the above technical problems.

[0005] The technical solution for the utility model to solve the above technical problems is as follows: A distribution automation test device based on a substation includes a portable suitcase, a test circuit board arranged in the portable suitcase, and a display screen and interfaces embedded on the surface of the portable suitcase; a central processing circuit, a current test circuit, a voltage test circuit, a switch quantity test circuit, and a communication status test circuit are integrated on the test circuit board. The input ends of the current test circuit, the voltage test circuit, the switch quantity test circuit, and the communication status test circuit are connected to the corresponding interfaces, the output ends of the current test circuit, the voltage test circuit, the switch quantity test circuit, and the communication status test circuit are all connected to the central processing circuit, and the display screen is connected to the central processing circuit.

[0006] Based on the above technical solutions, the utility model can also be improved as follows.

[0007] Further, the interface includes a current test interface, a voltage test interface, a digital input / output test interface, and a communication status test interface. The input ends of the current test circuit, the voltage test circuit, the digital input / output test circuit, and the communication status test circuit are respectively connected to the current test interface, the voltage test interface, the digital input / output test interface, and the communication status test interface.

[0008] Further, the current test interface, the voltage test interface, and the digital input / output test interface are all standard aviation interfaces, and the communication status test interface is an Ethernet port.

[0009] Further, the central processing circuit includes a main single-chip microcomputer and a slave single-chip microcomputer, which are connected through a serial port; the output ends of the current test circuit, the voltage test circuit, the digital input / output test circuit, and the communication status test circuit are all connected to the slave single-chip microcomputer, and the display screen is connected to the main single-chip microcomputer.

[0010] Further, a communication circuit is provided on the main single-chip microcomputer, and the communication circuit includes at least one of an RJ45 circuit, an RS-232 circuit, a USB interface circuit, and a Bluetooth circuit.

[0011] Further, the current test circuit includes

[0012] a first resistor, one end of which is the input end of the current test circuit and the other end is grounded;

[0013] a second resistor, one end of which is connected to one end of the first resistor;

[0014] a first capacitor, one end of which is connected to the other end of the second resistor and the other end is grounded;

[0015] a first operational amplifier, the non-inverting input end of which is connected to the other end of the second resistor;

[0016] a third resistor, one end of which is connected to the inverting input end of the first operational amplifier and the other end is grounded;

[0017] a fourth resistor, which is connected between the output end and the inverting input end of the first operational amplifier;

[0018] a first AD collector, the input end of which is connected to the output end of the first operational amplifier, and the output end is the output end of the current test circuit.

[0019] Further, the voltage test circuit includes

[0020] a fifth resistor, one end of which is the input end of the voltage test circuit;

[0021] A second operational amplifier, the inverting input terminal of which is connected to the other end of the fifth resistor;

[0022] A sixth resistor, connected between the inverting input terminal and the output terminal of the second operational amplifier;

[0023] A seventh resistor, one end of which is connected to the non-inverting input terminal of the first operational amplifier and the other end of which is grounded;

[0024] A second AD collector, the input terminal of which is connected to the output terminal of the second operational amplifier, and the output terminal of which is the output terminal of the voltage test circuit.

[0025] Furthermore, the digital input test circuit includes

[0026] An eighth resistor, one end of which is an input terminal of the digital input test circuit;

[0027] A ninth resistor, one end of which is the other input terminal of the digital input test circuit;

[0028] An optocoupler, one input terminal of which is connected to the other end of the eighth resistor, the other input terminal of which is connected to the other end of the ninth resistor, one output terminal of which is the output terminal of the digital input test circuit, and the other output terminal of which is grounded;

[0029] A second capacitor, connected between the two output terminals of the optocoupler;

[0030] A tenth resistor, one end of which is connected to one output terminal of the optocoupler and the other end of which is connected to the power supply VCC.

[0031] Furthermore, the communication status test circuit includes

[0032] A NOT gate, the input terminal of which is an input terminal of the communication status test circuit and is used to be connected to the SDA signal line of the network interface;

[0033] An eleventh resistor, one end of which is connected to the output terminal of the NOT gate;

[0034] A third capacitor, one end of which is connected to the other end of the eleventh resistor and the other end of which is grounded;

[0035] A twelfth resistor, one end of which is connected to the other end of the eleventh resistor;

[0036] A first NAND gate, one input terminal of which is the other input terminal of the communication status test circuit and is used to be connected to the SDA signal line of the network interface, and the other output terminal of which is connected to the other end of the twelfth resistor;

[0037] The second NAND gate has one input terminal as the other input terminal of the communication status test circuit and is used to be connected to the SCL signal line of the network port, another output terminal is connected to the output terminal of the first NAND gate, and the output terminal is the output terminal of the communication status test circuit.

[0038] Furthermore, a power supply module is also arranged in the portable suitcase. The power supply module is connected to the test circuit board and is used to supply power to the test circuit board.

[0039] The beneficial effects of the present utility model are as follows: The power distribution automation test equipment based on a substation of the present utility model integrates current detection, voltage detection, digital input / output detection, and communication status detection into one, and can comprehensively detect the power distribution automation terminal; the portable suitcase is convenient to carry, and through the interfaces on the portable suitcase, the wiring is simple and not prone to errors, so the work efficiency is improved, and the detection quality and personal and equipment safety are ensured. Description of the Drawings

[0040] Figure 1 is the internal structure block diagram of a power distribution automation test equipment based on a substation of the present utility model;

[0041] Figure 2 is the schematic diagram of the current test circuit;

[0042] Figure 3 is the schematic diagram of the voltage test circuit;

[0043] Figure 4 is the schematic diagram of the digital input / output test circuit;

[0044] Figure 5 is the schematic diagram of the communication status test circuit. Detailed Embodiments

[0045] The principles and features of the present utility model are described below with reference to the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0046] As Figure 1As shown in the figure, a substation-based distribution automation test device includes a portable suitcase, a test circuit board disposed in the portable suitcase, and a display screen and an interface embedded on the surface of the portable suitcase; the test circuit board is integrated with a central processing circuit, a current test circuit, a voltage test circuit, a digital input / output test circuit, and a communication status test circuit. The input ends of the current test circuit, the voltage test circuit, the digital input / output test circuit, and the communication status test circuit are connected to the corresponding interfaces, and the output ends of the current test circuit, the voltage test circuit, the digital input / output test circuit, and the communication status test circuit are all connected to the central processing circuit. The display screen is connected to the central processing circuit.

[0047] In this embodiment: The interface includes a current test interface, a voltage test interface, a digital input / output test interface, and a communication status test interface. The input ends of the current test circuit, the voltage test circuit, the digital input / output test circuit, and the communication status test circuit are respectively connected to the current test interface, the voltage test interface, the digital input / output test interface, and the communication status test interface. Specifically, the current test interface, the voltage test interface, and the digital input / output test interface are all standard aviation interfaces. Standard aviation interfaces are convenient to plug in and are mismatched with most distribution automation terminals on the market; the communication status test interface is a network port.

[0048] In this embodiment: A power supply module is further disposed in the portable suitcase. The power supply module is connected to the test circuit board and is used to supply power to the test circuit board.

[0049] In this embodiment: The central processing circuit includes a main single-chip microcomputer and a slave single-chip microcomputer. The main single-chip microcomputer and the slave single-chip microcomputer are connected through a serial port; the output ends of the current test circuit, the voltage test circuit, the digital input / output test circuit, and the communication status test circuit are all connected to the slave single-chip microcomputer, and the display screen is connected to the main single-chip microcomputer.

[0050] The main and slave single-chip microcomputers can improve the data processing speed and thus improve the detection efficiency.

[0051] In this embodiment: A communication circuit is disposed on the main single-chip microcomputer. The communication circuit includes at least one of an RJ45 circuit, an RS-232 circuit, a USB interface circuit, and a Bluetooth circuit.

[0052] In this embodiment: As Figure 2 shown, the current test circuit includes

[0053] A first resistor R1, one end of which is the input end of the current test circuit and the other end is grounded;

[0054] The second resistor R2, one end of which is connected to one end of the first resistor R1;

[0055] The first capacitor C1, one end of which is connected to the other end of the second resistor R2, and the other end is grounded;

[0056] The first operational amplifier U1, the non-inverting input terminal of which is connected to the other end of the second resistor R2;

[0057] The third resistor R3, one end of which is connected to the inverting input terminal of the first operational amplifier U1, and the other end is grounded;

[0058] The fourth resistor R4 is connected between the output terminal and the inverting input terminal of the first operational amplifier U1;

[0059] The first AD collector, the input terminal of which is connected to the output terminal of the first operational amplifier U1, and the output terminal is the output terminal of the current test circuit.

[0060] In the current test circuit, the detected current flows through the first resistor R1, the current signal is converted into a voltage signal, and then amplified by the first operational amplifier U1 and then AD collected, so as to realize the test of the current.

[0061] In this embodiment: as Figure 3 shown, the voltage test circuit includes,

[0062] The fifth resistor R5, one end of which is the input terminal of the voltage test circuit;

[0063] The second operational amplifier U2, the inverting input terminal of which is connected to the other end of the fifth resistor R5;

[0064] The sixth resistor R6 is connected between the inverting input terminal and the output terminal of the second operational amplifier U2;

[0065] The seventh resistor R7, one end of which is connected to the non-inverting input terminal of the first operational amplifier U1, and the other end is grounded;

[0066] The second AD collector, the input terminal of which is connected to the output terminal of the second operational amplifier U2, and the output terminal is the output terminal of the voltage test circuit.

[0067] In the voltage test circuit, the test voltage is amplified by the second operational amplifier U2 and then AD collected, so as to realize the test of the voltage.

[0068] In this embodiment: as Figure 4 shown, the digital quantity test circuit includes,

[0069] The eighth resistor R8, one end of which is an input terminal of the digital quantity test circuit;

[0070] The ninth resistor R9, one end of which is the other input terminal of the switching quantity test circuit;

[0071] The optocoupler U3, one input terminal of which is connected to the other end of the eighth resistor R8, the other input terminal of which is connected to the other end of the ninth resistor R9, one output terminal of which is the output terminal of the switching quantity test circuit, and the other output terminal of which is grounded;

[0072] The second capacitor C2 is connected between the two output terminals of the optocoupler U3;

[0073] The tenth resistor R10, one end of which is connected to one output terminal of the optocoupler U3, and the other end of which is connected to the power supply VCC.

[0074] The switching quantity test circuit is simple and effective. The detection of the switching quantity can be directly realized through the optocoupler U3, eliminating the rectification part; when it is DC, the wiring work is simplified, and the situation of abnormal operation or circuit burnout caused by incorrect connection of the positive and negative poles will not occur.

[0075] In this embodiment: as Figure 5 shown, the communication status test circuit includes

[0076] The NOT gate INV, the input terminal of which is one input terminal of the communication status test circuit and is used to be connected to the SDA signal line of the network port;

[0077] The eleventh resistor R11, one end of which is connected to the output terminal of the NOT gate INV;

[0078] The third capacitor C3, one end of which is connected to the other end of the eleventh resistor R11, and the other end of which is grounded;

[0079] The twelfth resistor R12, one end of which is connected to the other end of the eleventh resistor R11;

[0080] The first NAND gate NAND1, one input terminal of which is the other input terminal of the communication status test circuit and is used to be connected to the SDA signal line of the network port, and the other output terminal of which is connected to the other end of the twelfth resistor R12;

[0081] The second NAND gate NAND2, one input terminal of which is the other input terminal of the communication status test circuit and is used to be connected to the SCL signal line of the network port, the other output terminal of which is connected to the output terminal of the first NAND gate NAND2, and the output terminal of which is the output terminal of the communication status test circuit.

[0082] The communication status test circuit detects the communication status according to the serial clock signal and the serial data signal. The inverter INVERSE reverses the serial data signal SDA and then sends it out. The eleventh resistor R11 divides the voltage of the serial data signal SDA sent through the bus. A third capacitor C3 is connected to the output end of the eleventh resistor R11. The divided serial data signal SDA pre-charges and discharges the third capacitor C3 so that the output of the eleventh resistor R11 becomes stable. The first NAND gate NAND1 receives the serial data signal SDA. The output of the first NAND gate NAND1 is connected to the first input end of the second NAND gate NAND2. The second input end of the second NAND gate NAND2 receives the serial clock signal SCL. The communication status can be obtained after the result of the AND operation between the serial clock signal SCL and the first NAND gate NAND1 is inverted.

[0083] The distribution automation test equipment based on a substation of the present utility model integrates current detection, voltage detection, digital input detection, and communication status detection, and can comprehensively detect the distribution automation terminal; the portable suitcase is convenient to carry, and through the interfaces on the portable suitcase, the wiring is simple and not prone to errors, so the work efficiency is improved, and the detection quality and the safety of personnel and equipment are ensured.

[0084] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A distribution automation test device based on a substation, characterized in that: It includes a portable suitcase, a test circuit board arranged inside the portable suitcase, and a display screen and interfaces embedded on the surface of the portable suitcase; the test circuit board is integrated with a central processing circuit, a current test circuit, a voltage test circuit, a digital input / output test circuit, and a communication status test circuit. The input ends of the current test circuit, the voltage test circuit, the digital input / output test circuit, and the communication status test circuit are connected to the corresponding interfaces, and the output ends of the current test circuit, the voltage test circuit, the digital input / output test circuit, and the communication status test circuit are all connected to the central processing circuit, and the display screen is connected to the central processing circuit.

2. The distribution automation test equipment based on a substation according to claim 1, wherein: The interfaces include a current test interface, a voltage test interface, a digital input / output test interface, and a communication status test interface. The input ends of the current test circuit, the voltage test circuit, the digital input / output test circuit, and the communication status test circuit are respectively connected to the current test interface, the voltage test interface, the digital input / output test interface, and the communication status test interface.

3. The distribution automation test equipment based on a substation according to claim 2, characterized in that: The current test interface, the voltage test interface, and the digital input / output test interface are all standard aviation interfaces, and the communication status test interface is a network interface.

4. The distribution automation test equipment based on a substation according to claim 1, characterized in that: The central processing circuit includes a main single-chip microcomputer and a slave single-chip microcomputer, and the main single-chip microcomputer is connected to the slave single-chip microcomputer through a serial port; the output ends of the current test circuit, the voltage test circuit, the digital input / output test circuit, and the communication status test circuit are all connected to the slave single-chip microcomputer, and the display screen is connected to the main single-chip microcomputer.

5. The distribution automation test equipment based on a substation according to claim 4, wherein: A communication circuit is arranged on the main single-chip microcomputer, and the communication circuit includes at least one of an RJ45 circuit, an RS-232 circuit, a USB interface circuit, and a Bluetooth circuit.

6. The distribution automation test equipment based on a substation according to claim 1, characterized in that: The current test circuit includes a first resistor, one end being the input end of the current test circuit and the other end being grounded; a second resistor, one end connected to one end of the first resistor; a first capacitor, one end connected to the other end of the second resistor and the other end being grounded; a first operational amplifier, the non-inverting input end connected to the other end of the second resistor; a third resistor, one end connected to the inverting input end of the first operational amplifier and the other end being grounded; a fourth resistor, connected between the output end and the inverting input end of the first operational amplifier; a first AD collector, the input end connected to the output end of the first operational amplifier and the output end being the output end of the current test circuit.

7. The power distribution automation test equipment based on a substation according to claim 1, characterized in that: The voltage test circuit includes a fifth resistor, one end being the input end of the voltage test circuit; a second operational amplifier, the inverting input end connected to the other end of the fifth resistor; a sixth resistor, connected between the inverting input end and the output end of the second operational amplifier; a seventh resistor, one end connected to the non-inverting input end of the second operational amplifier and the other end being grounded; a second AD collector, the input end connected to the output end of the second operational amplifier and the output end being the output end of the voltage test circuit.

8. The power distribution automation test equipment based on a substation according to claim 1, characterized in that: The digital input / output test circuit includes an eighth resistor, one end being one input end of the digital input / output test circuit; The ninth resistor, one end of which is the other input terminal of the digital quantity test circuit; An optocoupler, one input terminal of which is connected to the other end of the eighth resistor, the other input terminal of which is connected to the other end of the ninth resistor, one output terminal of which is the output terminal of the digital quantity test circuit, and the other output terminal of which is grounded; The second capacitor, which is connected between the two output terminals of the optocoupler; The tenth resistor, one end of which is connected to one output terminal of the optocoupler, and the other end of which is connected to the power supply VCC.

9. The distribution automation test equipment based on a substation according to claim 3, characterized in that: The communication status test circuit includes: A NOT gate, the input terminal of which is one input terminal of the communication status test circuit and is used for connecting to the SDA signal line of the network interface; The eleventh resistor, one end of which is connected to the output terminal of the NOT gate; The third capacitor, one end of which is connected to the other end of the eleventh resistor, and the other end of which is grounded; The twelfth resistor, one end of which is connected to the other end of the eleventh resistor; The first NAND gate, one input terminal of which is the other input terminal of the communication status test circuit and is used for connecting to the SDA signal line of the network interface, and the other output terminal of which is connected to the other end of the twelfth resistor; The second NAND gate, one input terminal of which is the other input terminal of the communication status test circuit and is used for connecting to the SCL signal line of the network interface, and the other output terminal of which is connected to the output terminal of the first NAND gate, and the output terminal of which is the output terminal of the communication status test circuit.

10. The distribution automation test equipment based on a substation according to claim 1, characterized in that: A power supply module is further arranged in the portable suitcase, and the power supply module is connected to the test circuit board and is used for supplying power to the test circuit board.

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