An electronic feeder terminal circuit breaker test simulator

Abstract

The utility model provides a kind of electronic feeder terminal circuit breaker test simulator, belong to power distribution automation terminal technical field, the electronic feeder terminal circuit breaker test simulator, comprising;Shell;26 core input and output jack and 6 core power jack, 26 core input and output jack and 6 core power jack are installed in shell;Multiple telemeter input terminal and telemeter output terminal are all located in shell, and extend outward;It is composed of three major core modules, including high-precision analog quantity conversion module, simulation analog circuit breaker module, composite power supply module, its technical features are as follows: adopt precision voltage mutual inductance technology, support in primary side input large voltage, large current, convert into secondary small voltage by voltage converter, conversion accuracy meets 0.1%, more integrated EL817 photoelectric coupling isolator on simulation circuit breaker module, can realize the test of action time.

Description

Technical Field

[0001] This utility model belongs to the field of power distribution automation terminal technology, specifically relating to an electronic feeder terminal circuit breaker test simulator. Background Technology

[0002] Distribution automation terminals are intelligent devices installed in 6kV and above distribution networks for remote monitoring and control. They possess functions such as data acquisition, control, fault handling, and communication. Functionally, in addition to basic data acquisition and control functions, the terminals also have fault handling capabilities. The intelligent development of distribution automation terminals is of great significance for improving the power supply reliability of distribution networks, increasing operation and maintenance efficiency, and reducing operating costs. Based on the different current transformers / sensors used to acquire electrical quantities from pole-mounted switches, terminals are classified into three types according to their interface with the pole-mounted switches: electromagnetic, electronic, and digital. Among them, pole-mounted switches use electronic sensors (analog output mode) to acquire voltage (phase voltage, zero-sequence voltage) and current (phase current, zero-sequence current). Terminals used with these switches are referred to as electronic feeder terminals.

[0003] Electronic feeder terminals differ from electromagnetic feeder terminals. Electromagnetic feeder terminals use a primary pole-mounted circuit breaker to transmit high voltage and current through analog signals from the measuring winding voltage of the integrated power supply and measurement PT, current transformers (A, B, C, O), and zero-sequence voltage sensor U0, and then perform unified calculations. Electronic feeder terminals, on the other hand, use a primary pole-mounted circuit breaker to transmit high voltage and current through analog signals output from the power supply PT, and also collect analog / digital signals from the voltage and current sensors (A, B, C, O) before performing unified calculations. Utility Model Content

[0004] The purpose of this invention is to provide an electronic feeder terminal circuit breaker test simulator, aiming to solve the problem that existing electronic feeder terminals differ from electromagnetic feeder terminals. Electromagnetic feeder terminals use a primary pole-mounted circuit breaker to collect analog signals from the measuring winding voltage of the integrated power supply and measurement PT, current transformers (A, B, C, O), and zero-sequence voltage sensor U0, and then perform unified calculations. In contrast, electronic feeder terminals use a primary pole-mounted circuit breaker to collect analog signals from the power supply PT, and also collect analog / digital signals from the voltage sensors (A, B, C, O) and current sensors (A, B, C, O) before performing unified calculations.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An electronic feeder terminal circuit breaker test simulator, comprising:

[0007] shell;

[0008] A 26-pin input / output connector and a 6-pin power connector are installed inside the housing;

[0009] Multiple telemetry input terminals and telemetry output terminals are located inside the housing and extend outwards;

[0010] Multiple indicator lights, toggle switches, input quantity test terminals, output quantity test terminals, and action time test terminals are provided on the other side of the housing and extend outward.

[0011] The high-precision analog-to-digital converter module uses precision voltage inductance technology to support the conversion of large voltages and currents into secondary small voltages with a conversion accuracy of 0.1%.

[0012] The simulation circuit breaker module can simulate the opening and closing states of circuit breakers and disconnectors, as well as the indication of the non-energy-storage position. It also integrates an optocoupler for action time testing.

[0013] The composite power supply module has a wide voltage power supply module that can stably convert 220VAC mains power to 24VDC, providing a stable power supply for the entire device.

[0014] As a preferred embodiment of this utility model, the high-precision analog-to-digital converter module includes six TR1101-4C 100V / 3.25V voltage transformers and one TR1101-4C 100V / 6.5V voltage transformer for voltage signal conversion, and three TR0101-4C 10A / 10V and one TR0101-4C 10A / 2V wide-range voltage converters for current signal conversion.

[0015] As a preferred embodiment of this utility model, the simulated circuit breaker module includes a magnetic latching relay as a state switching system component with a dual-contact design, which can simultaneously open or close; an optocoupler in conjunction with protection components for testing the terminal's action time; and a toggle switch for simulating the manual operation mechanism of a disconnecting switch.

[0016] As a preferred embodiment of this utility model, the composite power supply module includes an E18*14 220VAC-24VDC transformer to reduce the mains power to 24V;

[0017] A rectifier bridge is used to convert alternating current (AC) to direct current (DC).

[0018] The TX4139 DC-DC switching power supply chip provides efficient and stable current output.

[0019] As a preferred embodiment of this utility model, the high-precision analog-to-digital converter module supports the following functions;

[0020] Analog quantity accuracy test: By connecting the relay protection tester and the terminal, the conversion accuracy of voltage and current is verified;

[0021] It is compatible with 7-loop voltage and 4-loop voltage acquisition methods.

[0022] As a preferred embodiment of this utility model, the device is used for production testing of electronic feeder terminals, which can improve testing efficiency, unify quality standards, reduce human error, and support problem tracking and resolution.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. This solution consists of three core modules: a high-precision analog-to-digital converter module, a simulated circuit breaker module, and a composite power supply module. Its technical features include: employing precision voltage inductance technology to support high voltage and current input on the primary side, which is then converted to a lower secondary voltage by a voltage converter, achieving a conversion accuracy of 0.1%; simulating circuit breaker opening, closing, open / closed positions, isolating switch opening, closing, open / closed positions, and indicating the non-energy-storage position through the simulated circuit breaker module; enabling functional testing of control circuit disconnection; and integrating an EL817 optocoupler isolator for time-of-action testing.

[0025] 2. In this solution, the power supply architecture utilizes a wide-voltage power supply module to stably convert 220VAC to 24VDC mains power to power the simulated circuit breaker module, enabling action switching and status indication. Regarding interface configuration, the device features a specially designed 26-pin aviation connector for use with the Type 58 pole-mounted circuit breaker, facilitating easy connection to electronic box-type feeder terminals. When the aviation connector is not needed, test leads can be directly plugged into the device's terminal sockets, allowing for free switching between dual-mode wiring. The device also has a 220VAC power aviation connector, directly powering the terminals without requiring an external power supply. Furthermore, the fixture features a unique housing design for easy transport and use. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is the control flowchart of this utility model;

[0028] Figure 2This is the circuit schematic diagram of the high-precision analog-to-digital converter module of this utility model.

[0029] Figure 3 This is the electrical circuit schematic diagram of the high-precision analog-to-digital converter module of this utility model;

[0030] Figure 4 The left side of this utility model is a view of a 26-pin aviation socket.

[0031] Figure 5 This is the circuit schematic diagram of the first simulation circuit breaker module of this utility model;

[0032] Figure 6 This is the circuit schematic diagram of the second simulation circuit breaker module of this utility model;

[0033] Figure 7 This is a schematic diagram of the composite power supply module of this utility model;

[0034] Figure 8 This is a diagram of the analog input / output terminals of the housing of this utility model;

[0035] Figure 9 This is a diagram of the 26-pin aviation connector terminal of the outer shell of this utility model;

[0036] Figure 10 This is the electrical schematic diagram of the input and output circuit of this utility model;

[0037] Figure 11 This is a diagram of the housing input and output terminals of this utility model;

[0038] Figure 12 This is a first outer shell diagram of the present invention;

[0039] Figure 13 This is a second outer shell diagram of the present invention.

[0040] In the diagram: 1. 26-pin input / output connector; 2. 6-pin power connector; 3. Telemetry input terminal; 4. Telemetry output terminal; 5. Indicator light; 6. Toggle switch; 7. Input quantity test terminal; 8. Output quantity test terminal; 9. Action time test terminal. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] Example 1

[0043] Please see Figures 1-12 The present invention provides the following technical solution:

[0044] An electronic feeder terminal circuit breaker test simulator, comprising:

[0045] shell;

[0046] A 26-pin input / output aviation connector 1 and a 6-pin power aviation connector 2 are installed inside the housing;

[0047] Multiple telemetry input terminals 3 and telemetry output terminals 4 are all located inside the housing and extend outwards;

[0048] Multiple indicator lights 5, toggle switches 6, input quantity test terminals 7, output quantity test terminals 8, and action time test terminals 9 are all located on the other side of the housing and extend outward.

[0049] The high-precision analog-to-digital converter module uses precision voltage inductance technology to support the conversion of large voltages and currents into secondary small voltages with a conversion accuracy of 0.1%.

[0050] The simulation circuit breaker module can simulate the opening and closing states of circuit breakers and disconnectors, as well as the indication of the non-energy-storage position. It also integrates an optocoupler for action time testing.

[0051] The composite power supply module has a wide voltage power supply module that can stably convert 220VAC mains power to 24VDC, providing a stable power supply for the entire device.

[0052] In a specific embodiment of this utility model, the outer shell adopts an industrial-grade protective design, integrates various functional modules internally, and has multiple sets of interfaces and operating components externally. Figure 4 and Figure 9The images show front views of the 26-pin input / output connector 1 and the 6-pin power connector 2 on the left side of the casing. The 26-pin input / output connector 1 is used to connect the signal transmission of the feeder terminal under test. The 6-pin power connector 2 supports external power input, compatible with AC or DC power supply. The telemetry input terminal 3 and output terminal 4 support analog inputs such as voltage and current, as well as feedback signal outputs. The terminals feature an anti-misinsertion design. Indicator light 5 displays the circuit breaker's opening / closing and energy storage status in real time. A toggle switch 6 allows manual switching of test modes, such as opening / closing simulation. Input and output test terminals 7 and 8 support digital signal input / output testing. The action time test terminal 9, used in conjunction with an optocoupler, accurately records the circuit breaker's action time, improving testing efficiency. This device significantly increases the testing rate and allows for direct observation of all operational phenomena of the terminal and circuit breaker without using a real circuit breaker. Therefore, it has a good application environment in mass production. Standardized quality standards are ensured through standardized testing processes, guaranteeing that each product meets the established technical specifications. By adopting unified testing parameters and judgment standards, the omissions or standard fluctuations that may occur during manual testing can be effectively avoided, reducing human error. Automated testing replaces traditional manual visual inspection, eliminating misjudgments caused by operator fatigue and experience differences, which helps in problem tracking and resolution. When problems are discovered through the tooling, the source of the problem can be quickly located, facilitating problem tracking and resolution, reducing product rework and scrap rates. Practicality: This utility model adopts a multi-modal compatible design, not only connecting to pole-mounted circuit breakers with fixed interfaces but also equipped with plug-in terminals. Each module can be used independently or combined as needed. This tooling has significant advantages in improving testing efficiency, unifying quality standards, reducing human error, facilitating maintenance and management, and improving problem tracking and resolution.

[0053] Please refer to the details. Figures 1-12 The high-precision analog-to-digital converter module includes six TR1101-4C 100V / 3.25V voltage transformers and one TR1101-4C 100V / 6.5V voltage transformer for voltage signal conversion, and three TR0101-4C 10A / 10V and one TR0101-4C 10A / 2V wide-range voltage converters for current signal conversion.

[0054] In this embodiment: as follows Figure 2As shown, since the voltage and current of the electronic feeder terminal are both acquired voltage signals, and the pole-mounted circuit breaker has two modes of acquiring 7-circuit voltage and 4-circuit voltage, which can also be referred to as 2-circuit voltage and 1-circuit voltage, this utility model uses six TR1101-4C 100V / 3.25V voltage transformers to convert 100V voltage to 3.25V small signal voltage and one TR1101-4C 100V / 6.5V transformer to convert 100V to 6.5V voltage. Simultaneously, it uses three TR0101-4C 10A / 10V wide-range voltage converters to convert 10A to 10V small signal voltage and one TR0101-4C... The 10A / 2V converter transforms 10A into a 2V small signal voltage. This simulates the primary voltage transformer of a pole-mounted circuit breaker, which converts the high voltage and high current of the cable connected to the pole into a small signal voltage output. The high voltage is connected to the 26-pin avionics socket via J8 as the first input / output terminal of the voltage analog quantity, and J17 is connected to the voltage terminal. J8 and J17 are connected in parallel with terminals of the same definition. The high current is connected to the 26-pin avionics socket via J1 as the input of the current analog quantity, and J10 is connected to the 26-pin avionics socket as the output terminal. J19 and J20 are connected to the current terminal. J1 and J10, and J19 and J20 are connected in parallel with terminals of the same definition. The simulator is connected to the 26-pin fixed-definition interface and the plug-in terminal respectively. The 26-pin avionics to 10-pin and 14-pin cables can be plugged into the 26-pin avionics socket and led to the feeder terminal.

[0055] Please refer to the details. Figures 1-12 The simulation circuit breaker module includes a magnetic latching relay as a state switching system component with a dual-contact design that can open or close simultaneously. An optocoupler, in conjunction with protection components, is used to test the terminal's operating time. A toggle switch is used to simulate the manual operation mechanism of the disconnecting switch.

[0056] In this embodiment: as follows Figure 5The circuit shown is the simulated circuit breaker execution section, containing four relays, four optocouplers, and other protective components and terminals. This circuit design simulates two structural modes: a Type 58 pole-mounted circuit breaker with both a disconnector and a circuit breaker, and a standard Type 32 pole-mounted circuit breaker with only a circuit breaker mechanism. JDQ1 and JDQ2 in the diagram represent the opening and closing sections of the circuit breaker mechanism, respectively, while JDQ3 and JDQ4 represent the closing and opening sections of the disconnector mechanism, respectively. Since the disconnector in actual applications only has a manual mechanism and no electrically operated structure, the terminal can only issue operation commands to the circuit breaker mechanism, not the disconnector mechanism. Therefore, a toggle switch SW1 is added to simulate the manual mechanism of the disconnector. J2 in the diagram connects to the corresponding terminal of the terminal to receive the voltage signals output from remote control closing and opening, and also feeds back remote closing and opening signals to the terminal. This simulator is equipped with indicator lights. As shown in the diagram, J6, J7, J13, and J14 are the terminals connected to the lights. These lights indicate the position status of the circuit breaker and disconnector switches on the simulator, allowing the position status to be directly viewed on the simulator side. The principle is as follows... Figure 1 U13, U12, U14, and U15 are optocouplers, which can be used in conjunction with relay protection to test the terminal action time. When the closing or opening action is executed, the J2 terminal connected to HZ1+ or FZ1+ at the front end of the optocoupler receives the +24V voltage signal sent by the terminal. After the voltage is reduced to about 2V by R2 or R1, the optocoupler can be turned on. When the relay protection detects the conduction action, the current time can be recorded, so the action time can be calculated.

[0057] Please refer to the details. Figures 1-12 The composite power supply module includes an E18*14 220VAC-24VDC transformer, which reduces the mains power to 24V;

[0058] A rectifier bridge is used to convert alternating current (AC) to direct current (DC).

[0059] The TX4139 DC-DC switching power supply chip provides efficient and stable current output.

[0060] In this embodiment: according to Figure 7The P1 section connects to the AC power plug. An E18*14 1VA 220V~24V transformer is used to reduce the AC power to 24V. At this point, the voltage is still AC. A 2W10 rectifier bridge is used to convert the AC power to DC power. After passing through a filter circuit, the voltage is in a relatively stable state. At the same time, a DC-DC switching power chip TX4139 is used to provide a stable current output. This chip has high conversion efficiency, built-in protection function, wide input voltage, and is suitable for high current output scenarios. The converted 24V power is connected to the P2 terminal, which can provide power to the simulated circuit breaker module. This module has a set of terminals connected in parallel at the AC input port, which can simultaneously provide AC power to the terminal. The terminal does not need to be connected to an external AC power source, simplifying the wiring.

[0061] Please refer to the details. Figures 1-12 The high-precision analog-to-digital converter module supports the following functions;

[0062] Analog quantity accuracy test: By connecting the relay protection tester and the terminal, the conversion accuracy of voltage and current is verified;

[0063] It is compatible with 7-loop voltage and 4-loop voltage acquisition methods.

[0064] In this embodiment: by connecting the relay protection tester and the terminal under test, the conversion accuracy of voltage and current signals is verified to be 0.1%, ensuring that the analog quantity collected by the terminal is consistent with the actual value and meets the accuracy requirements of the power system. It supports 7-circuit acquisition modes such as three-phase voltage + zero-sequence voltage + other auxiliary voltages and 4-circuit acquisition modes such as three-phase voltage + zero-sequence voltage, adapting to the voltage acquisition needs of different feeder terminals, improving test flexibility, and high-precision testing ensures the accuracy of terminal measurement, avoiding protection maloperation or failure to operate due to conversion errors. Multi-circuit compatibility reduces the frequency of equipment replacement and is suitable for testing various terminal models.

[0065] Please refer to the details. Figures 1-12 This device is used for production testing of electronic feeder terminals. It can improve testing efficiency, standardize quality, reduce human error, and support problem tracking and resolution.

[0066] In this embodiment, the remote measurement input terminal 3 and remote measurement output terminal 4, the input quantity test terminal 7 and the output quantity test terminal 8 are integrated to avoid switching between multiple devices, shorten the testing time of a single terminal, and ensure that all terminals have consistent factory parameters through high-precision modules and standardized testing procedures, thereby reducing batch differences.

[0067] The working principle and usage process of this utility model are as follows: a power supply is connected through a 6-pin power connector 2, a composite power supply module supplies power to the system, a 26-pin input / output connector 1 connects to the terminal under test, a telemetry terminal connects to the signal to be tested, a high-precision module completes signal conversion, a toggle switch 6 selects the test mode, a simulation module simulates the operation of a circuit breaker, an indicator light 5 displays the status synchronously, an input test terminal 7 and an output test terminal 8 verify the logic function, an action time terminal records the response time, and the data is fed back to the terminal.

[0068] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electronic feeder terminal circuit breaker test simulator, characterized in that, include: shell; A 26-pin input / output connector (1) and a 6-pin power connector (2) are installed inside the housing; Multiple telemetry input terminals (3) and telemetry output terminals (4) are all located inside the housing and extend outward; Multiple indicator lights (5), toggle switches (6), input quantity test terminals (7), output quantity test terminals (8) and action time test terminals (9) are provided on the other side of the housing and extend outward; The high-precision analog-to-digital converter module uses precision voltage inductance technology to support the conversion of large voltages and currents into secondary small voltages with a conversion accuracy of 0.1%. The simulation circuit breaker module can simulate the opening and closing states of circuit breakers and disconnectors, as well as the indication of the non-energy-storage position. It also integrates an optocoupler for action time testing. The composite power supply module has a wide voltage power supply module that can stably convert 220VAC mains power to 24VDC, providing a stable power supply for the entire device.

2. The electronic feeder terminal circuit breaker test simulator according to claim 1, characterized in that: The high-precision analog-to-digital converter module includes six TR1101-4C 100V / 3.25V voltage transformers and one TR1101-4C 100V / 6.5V voltage transformer for voltage signal conversion, and three TR0101-4C 10A / 10V and one TR0101-4C 10A / 2V wide-range voltage converters for current signal conversion.

3. The electronic feeder terminal circuit breaker test simulator according to claim 2, characterized in that: The simulated circuit breaker module includes a magnetic latching relay as a state switching system component with a dual-contact design, which can open or close simultaneously. An optocoupler, in conjunction with protection components, is used to test the terminal's operating time. A toggle switch is used to simulate the manual operation mechanism of the disconnecting switch.

4. The electronic feeder terminal circuit breaker test simulator according to claim 3, characterized in that: The composite power supply module includes an E18*14 220VAC-24VDC transformer, which reduces the mains power to 24V; A rectifier bridge is used to convert alternating current (AC) to direct current (DC). The TX4139 DC-DC switching power supply chip provides efficient and stable current output.

5. The electronic feeder terminal circuit breaker test simulator according to claim 4, characterized in that: The high-precision analog-to-digital converter module supports the following functions; Analog quantity accuracy test: By connecting the relay protection tester and the terminal, the conversion accuracy of voltage and current is verified; It is compatible with 7-loop voltage and 4-loop voltage acquisition methods.

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