Power distribution terminal testing device and method

Abstract

The invention relates to the technical field of power distribution terminal testing, provides a power distribution terminal testing device and method, and realizes comprehensive testing of a power distribution terminal by integrating remote measurement, remote control and remote signaling testing functions. And the standardized aviation plug connection port and the universal test port are used, so that the connection is simple and convenient, and the test error risk caused by improper connection is reduced. Three-remote function detection can be completed under the condition that operation and distribution network automatic circuit breaker complete equipment is not powered off, normal power supply of a power distribution network is not affected, and power supply reliability is not reduced; the device is respectively connected to the circuit breaker and the FTU through the aviation plug wires, a tester only needs to operate on the ground and does not need to work on a tower for a long time, and the device is portable, adopts a passive design and is convenient to work; testers complete testing work on the ground, the distance between the testers and primary equipment is guaranteed, and electric shock is avoided; primary equipment maloperation is prevented, the design of the current aviation socket has a circuit releasing function, and open-circuit operation of the current transformer is completely eradicated; and the misoperation of the primary circuit breaker caused by misoperation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution terminal testing, and in particular to a power distribution terminal testing device and method. Background Art

[0002] At present, in the operation and maintenance of the distribution network, there are several major technical problems when troubleshooting the complete set of pole-mounted circuit breakers:

[0003] 1. Troubleshooting is difficult:

[0004] Due to the differences in design and function of pole-mounted circuit breakers from different manufacturers, it is difficult for operation and maintenance personnel to form a unified troubleshooting standard, resulting in a cumbersome and inefficient troubleshooting process. The lack of dedicated fault diagnosis tools or software makes it impossible to quickly locate faults, and requires relying on experience for step-by-step troubleshooting, which increases time costs.

[0005] 2. Complexity of on-site wiring:

[0006] When troubleshooting, multiple parameters including voltage, current, and input and output quantities are tested, which requires the connection of multiple signals. This makes on-site wiring very complicated and easily leads to wiring errors. In addition, there are no test terminals for voltage and remote signals, and there is a risk of misconnection and electric shock when connecting related electrical quantities.

[0007] 3. Safety hazards:

[0008] There is a lack of effective safety protection measures on site, especially in high-voltage working environments, where operation and maintenance personnel are easily exposed to the risk of electric shock when performing wiring and testing.

[0009] Based on this, the present invention proposes a power distribution terminal testing device and method to improve the power distribution terminal testing efficiency and enhance the safety of operators. Summary of the invention

[0010] The purpose of the present invention is to solve the shortcomings of the prior art and provide a distribution terminal testing device and method. For distribution network automation circuit breaker complete sets of equipment with different aviation plug standards, the voltage and current transformers and the aviation plugs from the circuit breaker to the control box are fully utilized to realize the "three remote" functions of the distribution network automation circuit breaker complete set without power outage, thereby improving the distribution terminal testing efficiency and the safety of operators.

[0011] In order to achieve the above object, the present invention adopts the following technical solutions:

[0012] A power distribution terminal test device, comprising: an aviation plug connection port, a universal test port, an operation simulation module of a primary circuit breaker, a signal acquisition module, a control module, and a human-computer interaction module; the aviation plug connection port is divided into an FTU connection port and a circuit breaker connection port;

[0013] The universal test port is divided into an FTU test port and a circuit breaker test port; the FTU connection port terminals are connected to the FTU test port terminals in a one-to-one correspondence; the circuit breaker connection port terminals are connected to the circuit breaker test port terminals in a one-to-one correspondence; the FTU test port is electrically connected to the operation simulation module of the primary circuit breaker; the circuit breaker test port is electrically connected to the signal acquisition module; the control module is electrically connected to the operation simulation module, the signal acquisition module and the human-computer interaction module of the primary circuit breaker respectively;

[0014] The operation simulation module of the primary circuit breaker is used to simulate the opening, closing and energy storage of the primary circuit breaker under the control of the remote control master station and the control module;

[0015] The signal acquisition module is used to collect circuit breaker opening, closing, energy storage signal collection, three-phase voltage signal detection and three-phase current signal detection, and output the detected signals to the control module;

[0016] The control module is used to receive and process the output signal of the signal acquisition module, and transmit it to the human-machine interaction module for display; the control module converts the instructions input by the human-machine interaction module into corresponding commands to control the operation simulation module action of the primary circuit breaker.

[0017] Preferably, the aviation plug connection port includes: a standard voltage socket and a current aviation socket, and the corresponding FTU connection port and circuit breaker connection port are also divided into a voltage socket and a current aviation socket; the FTU connection port is connected to the FTU through a set of aviation plug cables; the circuit breaker connection port is connected to the circuit breaker through an in-service aviation plug cable.

[0018] Preferably, the operation simulation module of the primary circuit breaker comprises: an opening and closing simulation circuit and an energy storage simulation circuit; LED display lights are provided at the output ends of the opening and closing simulation circuit and the energy storage simulation circuit.

[0019] Preferably, the opening and closing simulation circuit includes: relay RYL1, diode D1, transistor Q1, capacitor C5 and resistor R10, the relay RYL1 pin 5, pin 7, pin 6 are respectively connected to the opening FW port, the common terminal YXCOM, and the closing HW port, the relay RYL1 pin 8 is connected to the power supply 12V, and the pin 1 is connected to the collector of the transistor Q1, and a diode D1 is provided between the collector of the transistor Q1 and the relay RYL1 pin 8, the cathode of which is connected to the relay RYL1 pin 8, and the anode is connected to the collector of the transistor Q1; the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is connected to one end of the resistor R10, and the other end of the resistor R10 is connected to the J1 signal terminal output by the control module; the relay RYL1 pin 2, pin 3, pin 4 are respectively connected to the closing LED display light, the power supply 12V, and the opening LED display light; the relay RYL1 pin 8 is grounded through the capacitor C5.

[0020] Preferably, the energy storage simulation circuit includes: relay RYL2, diode D2, transistor Q2, capacitor C4 and resistor R11, the relay RYL2 pin 7 and pin 6 are respectively connected to the non-energy stored WCN1 port and the common end YXCOM, the relay RYL2 pin 8 is connected to the power supply 12V, and the pin 1 is connected to the collector of the transistor Q2. A diode D2 is provided between the collector of the transistor Q2 and the relay RYL2 pin 8, and its cathode is connected to the relay RYL2 pin 8, and its anode is connected to the collector of the transistor Q2; the emitter of the transistor Q2 is grounded, the base of the transistor Q2 is connected to one end of the resistor R11, and the other end of the resistor R11 is connected to the J2 signal end output by the control module; the relay RYL2 pin 3 and pin 4 are respectively connected to the power supply 12V and the energy storage LED display light; the relay RYL2 pin 8 is grounded through the capacitor C4.

[0021] Preferably, the signal acquisition module includes: opening, closing, energy storage signal detection circuits, three-phase voltage signal detection circuits and three-phase current signal detection circuits; the input of the opening signal detection circuit is the opening positive pole FZ+ port and the opening negative pole FZ- port, and the output is the opening signal port FZ_ADCV; a plurality of resistors are connected in series between the opening positive pole FZ+ port and the opening negative pole FZ- port for voltage division, and the last resistor R17 is connected in parallel to an isolation amplifier, and pins 1 and 8 of the isolation amplifier are connected to the power supply 5V1, pins 4, 5 and 6 are grounded, and pins R17 are connected in parallel to the power supply 5V1, and pins 1 and 8 of the isolation amplifier are connected to the power supply 5V1, pins 4, 5 and 6 are grounded, and pins R17 are connected in parallel to the power supply 5V1, and pins 4, 5 and 6 are grounded. 2 and pin 3 are respectively connected in parallel at both ends of the last resistor R17, the end of pin 7 is connected in series with resistor R18, and the end of resistor R18 is the signal output port; the closing signal detection circuit, the energy storage signal detection circuit and the opening signal detection circuit have the same structure, and the difference lies in the circuit input and output; the input of the closing signal detection circuit is the closing positive pole HZ+ port and the closing negative pole HZ- port, and the output is the closing signal port HZ_ADCV; the input of the energy storage signal detection circuit is the energy storage CN port and the non-energy storage WCN port, and the output is the closing signal port CN_ADCV.

[0022] Preferably, the three-phase voltage signal detection circuit has the same structure as the opening signal detection circuit, the difference lies in the number of circuits and the circuit input and output. The three-phase voltage signal detection circuit is divided into three sub-circuits, each sub-circuit detects the voltage signal of one phase respectively, and the inputs of the three sub-circuits are IA port and three-phase common terminal I0COM, IB port and three-phase common terminal I0COM, IC port and three-phase common terminal I0COM respectively, and the outputs are IA_ADCV, IB_ADCV, and IC_ADCV respectively.

[0023] Preferably, the input of the three-phase current signal detection circuit is the current sensor output CI_OUT for collecting the current of the energy storage circuit, a plurality of resistors are arranged between the input of the three-phase current signal detection circuit and the ground for voltage division, the output of the three-phase current signal detection circuit is CI_ADCV, a resistor R7 is connected in series at the front end of IC_ADCV, and the rear end of the resistor R7 is grounded through a capacitor C11.

[0024] Preferably, the control module uses STM32F103C8T6 as the main control chip, and provides a pulse signal to the single motor through a crystal oscillator circuit to drive the single-chip microcomputer to work; the operation simulation module, signal acquisition module and human-computer interaction module output signals of the primary circuit breaker are connected to the single-chip microcomputer, and the single-chip microcomputer performs state judgment and ADC conversion on the output signals of the operation simulation module and signal acquisition module of the primary circuit breaker to obtain the input state and current and voltage values, and then displays these states and data on the LCD screen through the serial port; the output signal of the human-computer interaction module is converted into a corresponding command to control the action of the operation simulation module of the primary circuit breaker.

[0025] Another object of the present invention is to provide a power distribution terminal testing method, which comprises the following steps:

[0026] S1. Equipment preparation: connect the power distribution terminal test device to the FTU and circuit breaker;

[0027] S2. Circuit breaker and aviation plug detection: The circuit breaker connection port is connected to the circuit breaker through the aviation plug line in operation; the circuit breaker test port can use a multimeter to detect the on / off and resistance of the aviation plug line and the control and signal circuits inside the primary circuit breaker to determine whether there are any problems inside the primary circuit breaker and the aviation plug;

[0028] S3, start the power distribution terminal test device and enter the telemetry test mode. At this time, the circuit breaker connection port is connected to the circuit breaker through the in-service aviation plug line;

[0029] The signal acquisition module collects the opening, closing and energy storage signals of the circuit breaker, and detects the three-phase voltage and current signals at the same time;

[0030] The collected signals are transmitted to the control module for processing;

[0031] Display the signal output by the control module on the LCD screen of the human-computer interaction module in real time;

[0032] Verify whether the telemetry data sent by FTU is correct by comparing the device data with the FTU data and the data received by the remote control master station;

[0033] S4, add electrical quantity to FTU; connect FTU connector to FTU through complete set of aviation plug wires; insert the test wire of relay protection tester into FTU test port;

[0034] Monitor whether the FTU can respond correctly and provide output signals after receiving electrical quantities;

[0035] S5, remote control function test: switch to remote control test mode, at this time, the FTU connector is connected to the FTU through a set of aviation plug cables;

[0036] Input control commands through the remote control master station to control the operation simulation module of the primary circuit breaker to simulate the opening, closing and energy storage actions. By observing the on / off status of the corresponding action LED indicator, it can be judged whether the remote control function is accurate.

[0037] S6. Remote signaling function test: During the remote control test, the feedback information of the control module to the primary circuit breaker operation simulation module, that is, the action and displacement of the primary circuit breaker operation simulation module, is recorded, and the action and displacement of the primary circuit breaker operation simulation module are compared and analyzed with the action and displacement received by the FTU and the action and displacement received by the remote control master station to determine whether the remote signaling function is accurate;

[0038] S7. Data recording: record each test result in the test report.

[0039] The present invention discloses a power distribution terminal testing device having the following beneficial effects.

[0040] The present invention realizes comprehensive testing of distribution terminals by integrating telemetry, remote control and remote signaling test functions, and improves test efficiency and accuracy. The standardized aviation plug connection interface and universal test port are adopted to simplify equipment connection and reduce the risk of test errors caused by improper connection. The human-computer interaction module displays various data in real time, which is convenient for operators to monitor the system status; the "three remotes" (telemetry, remote signaling, remote control) function detection can be completed without power outage of the complete set of automatic circuit breaker equipment in the distribution network, which does not affect the normal power supply of the distribution network and does not reduce the power supply reliability; the circuit breaker and FTU are connected to the aviation plug line respectively, and the tester only needs to operate the device on the ground, without having to work on the pole tower for a long time. The device is portable and passive design, and no external power supply is required for field work, which is convenient to work; the tester completes the test work on the ground, ensuring the distance from the primary equipment, eliminating the risk of electric shock and high fall; to prevent the primary equipment from malfunctioning, the current aviation plug design has a circuit release function to prevent the current transformer from operating in an open circuit; the device is passive design to ensure that the primary circuit breaker will not malfunction due to improper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a system structure diagram of the power distribution terminal testing device of the present invention.

[0042] Figure 2 It is a schematic diagram of the connection between the power distribution terminal test device of the present invention, the FTU and the circuit breaker.

[0043] Figure 3 This is a circuit diagram of an operation simulation module of a primary circuit breaker of the present invention.

[0044] Figure 4 It is a schematic diagram of the opening signal detection circuit of the present invention.

[0045] Figure 5 It is a schematic diagram of the closing signal detection circuit of the present invention.

[0046] Figure 6 This is a schematic diagram of the energy storage signal detection circuit of the present invention.

[0047] Figure 7 It is a schematic diagram of the three-phase voltage signal detection circuit of the present invention.

[0048] Figure 8 It is a schematic diagram of the three-phase current signal detection circuit of the present invention.

[0049] Fig. 9 This is a schematic diagram of the control module circuit of the present invention.

[0050] In the attached figure: 1. Aviation plug connection port; 11. FTU connection port; 12. Circuit breaker connection port; 2. General test port; 21. FTU test port; 22. Circuit breaker test port; 3. Primary circuit breaker operation simulation module; 31. Opening and closing simulation circuit; 32. Energy storage simulation circuit; 4. Signal acquisition module; 41. Opening signal detection circuit; 42. Closing signal detection circuit; 43. Energy storage signal detection circuit; 44. Three-phase voltage signal detection circuit; 45. Three-phase current signal detection circuit; 5. Control module; 6. Human-computer interaction module; 7. Circuit breaker; 8. FTU; 9. Remote control master station. DETAILED DESCRIPTION

[0051] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0052] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0053] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0054] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0055] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0056] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0057] Example 1

[0058] Please refer to Figure 1 , This embodiment provides a power distribution terminal test device, including: an aviation plug connection port 1, a universal test port 2, an operation simulation module 3 of a primary circuit breaker, a signal acquisition module 4, a control module 5, and a human-computer interaction module 6; the aviation plug connection port 1 is divided into an FTU connection port 11 and a circuit breaker connection port 12;

[0059] like Figure 1 and Figure 2As shown, the universal test port 2 is divided into an FTU test port 21 and a circuit breaker test port 22; the terminals of the FTU connection port 11 are connected to the terminals of the FTU test port 21 in a one-to-one correspondence; the terminals of the circuit breaker connection port 12 are connected to the terminals of the circuit breaker test port 22 in a one-to-one correspondence; the FTU test port 21 is electrically connected to the operation simulation module 3 of the primary circuit breaker; the circuit breaker test port 22 is electrically connected to the signal acquisition module 4; the control module 5 is electrically connected to the operation simulation module 3, the signal acquisition module 4 and the human-computer interaction module 6 of the primary circuit breaker respectively;

[0060] The operation simulation module 3 of the primary circuit breaker is used to simulate the opening, closing and energy storage of the primary circuit breaker under the control of the remote control master station 9 and the control module 5;

[0061] The signal acquisition module 4 is used to collect the opening, closing, and energy storage signals of the circuit breaker 7, detect the three-phase voltage signals, and detect the three-phase current signals, and output the detected signals to the control module 5;

[0062] The control module 5 is used to receive and process the output signal of the signal acquisition module 4, and transmit it to the human-machine interaction module 6 for display; the control module 5 converts the instruction input by the human-machine interaction module 6 into a corresponding command to control the operation simulation module 3 of the primary circuit breaker. The human-machine interaction module 6 adopts the commercially available TJC8048X543_011C_l.

[0063] In this embodiment, as a preferred embodiment, Fig. 9 As shown, the control module 5 adopts

[0064] STM32F103C8T6 is used as the main control chip, which provides pulse signals to the single motor through the crystal oscillator circuit to drive the single-chip microcomputer to work; the output signals of the operation simulation module 3, signal acquisition module 4 and human-computer interaction module 6 of the primary circuit breaker are connected to the single-chip microcomputer, and the single-chip microcomputer performs state judgment and ADC conversion on the output signals of the operation simulation module 3 and signal acquisition module 4 of the primary circuit breaker to obtain the input state and current and voltage values, and then displays these states and data on the LCD screen through the serial port; the output signal of the human-computer interaction module 6 is converted into a corresponding command to control the operation simulation module 3 of the primary circuit breaker. It should be noted that because the line is normally energized, the misoperation of the primary circuit breaker is not avoided due to improper operation. The distribution terminal test device is set to passive, and the control and signal of the primary circuit breaker are also passive to ensure that the primary side circuit breaker will not malfunction.

[0065] like Figure 2As shown, the aviation plug connector 1 includes: a standard voltage socket and a current aviation socket, and the corresponding FTU connector 11 and the circuit breaker connector 12 are also divided into a voltage socket and a current aviation socket; the FTU connector 11 is connected to the FTU8 through a complete set of aviation plug wires; the circuit breaker connector 12 is connected to the circuit breaker 7 through an in-service aviation plug wire. It is worth noting that when the aviation plug is unplugged, the internal phase current and zero-sequence current loops of the standard current aviation socket are short-circuited respectively to avoid the problem of an open current loop.

[0066] The operation simulation module 3 of the primary circuit breaker comprises: an opening and closing simulation circuit 31 and an energy storage simulation circuit 32; LED display lights are arranged at the output ends of the opening and closing simulation circuit 31 and the energy storage simulation circuit 32.

[0067] like Figure 3 As shown, the opening and closing simulation circuit 31 includes: a relay RYL1, a diode D1, a transistor Q1, a capacitor C5 and a resistor R10, the relay RYL1 pin 5, pin 7, pin 6 are respectively connected to the opening FW port, the common terminal YXCOM, and the closing HW port, the relay RYL1 pin 8 is connected to the power supply 12V, and the pin 1 is connected to the collector of the transistor Q1, and a diode D1 is provided between the collector of the transistor Q1 and the relay RYL1 pin 8, and its cathode is connected to the relay RYL1 pin 8, and its anode is connected to the collector of the transistor Q1; the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is connected to one end of the resistor R10, and the other end of the resistor R10 is connected to the J1 signal terminal output by the control module 5; the relay RYL1 pin 2, pin 3, pin 4 are respectively connected to the closing LED display light, the power supply 12V, and the opening LED display light; the relay RYL1 pin 8 is grounded through the capacitor C5.

[0068] The energy storage simulation circuit 32 includes: relay RYL2, diode D2, transistor Q2, capacitor C4 and resistor R11, relay RYL2 pin 7 and pin 6 are respectively connected to the non-energy storage WCN1 port and the common terminal YXCOM, relay RYL2 pin 8 is connected to the power supply 12V, pin 1 is connected to the collector of transistor Q2, and a diode D2 is arranged between the collector of transistor Q2 and relay RYL2 pin 8, the cathode of which is connected to relay RYL2 pin 8, and the anode is connected to the collector of transistor Q2; the emitter of transistor Q2 is grounded, the base of transistor Q2 is connected to one end of resistor R11, and the other end of resistor R11 is connected to the J2 signal terminal output by the control module 5; relay RYL2 pin 3 and pin 4 are respectively connected to the power supply 12V and the energy storage LED display light; relay RYL2 pin 8 is grounded through capacitor C4. Relay RYL1 and relay RYL2 are single-pole double-throw relays.

[0069] Example 2

[0070] Based on Example 1, please refer to 4 to Figure 7 The signal acquisition module 4 provided in this embodiment includes: a switch-on, switch-off, and energy storage signal detection circuit 43, a three-phase voltage signal detection circuit 44, and a three-phase current signal detection circuit 45; Figure 4 As shown, the input of the gate-off signal detection circuit 41 is the gate-off positive pole FZ+ port and the gate-off negative pole FZ- port, and the output is the gate-off signal port FZ_ADCV; a plurality of resistors are connected in series between the gate-off positive pole FZ+ port and the gate-off negative pole FZ- port for voltage division, and the last resistor R17 is connected in parallel to an isolation amplifier, and pins 1 and 8 of the isolation amplifier are connected to the power supply 5V1, pins 4, 5 and 6 are grounded, pins 2 and 3 are respectively connected in parallel to both ends of the last resistor R17, and a resistor R18 is connected in series at the end of pin 7, and the end of resistor R18 is a signal output port; as shown Figure 5 and Figure 6 As shown, the closing signal detection circuit 42 and the energy storage signal detection circuit 43 have the same structure as the opening signal detection circuit 41, and the difference lies in the circuit input and output; the closing signal detection circuit 42 inputs the closing positive pole HZ+ port and the closing negative pole HZ- port, and the output is the closing signal port HZ_ADCV; the energy storage signal detection circuit 43 inputs the energy storage CN port and the un-energy storage WCN port, and the output is the closing signal port CN_ADCV. There is no conductive contact between the input and output parts of the loop, which does not affect the original operation of the system. The isolation amplifier uses the commercially available AMC1200BDWVR. The input of AMC1200 or AMC1200B is optimized for direct connection to a shunt resistor or other low voltage level signal source. The device has excellent performance and supports precise current control, thereby reducing system-level power consumption (especially in motor control applications) and reducing torque ripple, and can automatically adjust the common mode voltage of the output signal to a 3V or 5V low-side power supply voltage.

[0071] like Figure 8 As shown, the input of the three-phase current signal detection circuit 45 is the current sensor output CI_OUT for collecting the current of the energy storage circuit. A plurality of resistors are arranged between the input of the three-phase current signal detection circuit 45 and the ground for voltage division. The output of the three-phase current signal detection circuit 45 is CI_ADCV. A resistor R7 is connected in series at the front end of IC_ADCV, and the rear end of the resistor R7 is grounded through a capacitor C11.

[0072] like Figure 7As shown, the three-phase voltage signal detection circuit 44 has the same structure as the opening signal detection circuit 41, the difference is the number of circuits and the circuit input and output. The three-phase voltage signal detection circuit 44 is divided into three sub-circuits, each of which detects the voltage signal of one phase respectively. The three sub-circuits input are IA port and three-phase common terminal I0COM, IB port and three-phase common terminal I0COM, IC port and three-phase common terminal I0COM, and the outputs are IA_ADCV, IB_ADCV, and IC_ADCV. The current sensor adopts a commercially available Hall current sensor, and the Hall current sensor model is WHK_EKA5S2.

[0073] Example 3

[0074] Based on Embodiments 1 and 2, this embodiment proposes a power distribution terminal testing method of Embodiments 1-2, including the following steps:

[0075] S1. Equipment preparation: connect the power distribution terminal test device to FTU8 and circuit breaker 7;

[0076] S2, circuit breaker 7 and aviation plug detection; the circuit breaker connection port 12 is connected to the circuit breaker 7 through the aviation plug line in operation; the circuit breaker test port 22 can detect the aviation plug line and the control and signal circuits inside the primary circuit breaker and the resistance by using a multimeter to determine whether there are problems inside the primary circuit breaker and the aviation plug;

[0077] S3, start the power distribution terminal test device and enter the telemetry test mode. At this time, the circuit breaker connection port 12 is connected to the circuit breaker 7 through the operating aviation plug line;

[0078] The signal acquisition module 4 is used to collect the opening, closing and energy storage signals of the circuit breaker 7, and to detect the three-phase voltage and current signals at the same time;

[0079] The collected signals are transmitted to the control module 5 for processing;

[0080] The signal output by the control module 5 is displayed in real time on the LCD screen of the human-computer interaction module 6;

[0081] By comparing the device data with the FTU8 data and the data received by the remote control master station 9, it is verified whether the telemetry data sent by FTU8 is correct;

[0082] S4, FTU8 add electrical quantity; FTU connection port 11 is connected to FTU8 through a set of aviation plug wires; Use the test wire of the relay protection tester to insert into FTU test port 21;

[0083] Monitor whether FTU8 can respond correctly and provide output signals after receiving electrical quantities;

[0084] S5, remote control function test: switch to remote control test mode, at this time, FTU connection port 11 is connected to FTU8 through a set of aviation plug wires;

[0085] Input control instructions through the remote control master station 9 to control the operation simulation module 3 of the primary circuit breaker to perform simulated actions of opening, closing and energy storage. By observing the on / off status of the corresponding action LED indicator, it is judged whether the remote control function is accurate;

[0086] S6, remote signaling function test; during the remote control test, the feedback information of the control module 5 to the primary circuit breaker operation simulation module, that is, the action and displacement of the primary circuit breaker operation simulation module, is recorded, and the action and displacement of the primary circuit breaker operation simulation module are compared and analyzed with the action and displacement received by FTU8 and the action and displacement received by the remote control master station 9 to determine whether the remote signaling function is accurate;

[0087] S7. Data recording: record each test result in the test report.

[0088] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The substitution may be a substitution of a part of the structure, device, method step, or a complete technical solution. The equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A power distribution terminal testing device, characterized in that: include: Aviation plug connector, universal test port, primary circuit breaker operation simulation module, signal acquisition module, control module, human-computer interaction module; The aviation plug connection port is divided into an FTU connection port and a circuit breaker connection port; The universal test port is divided into an FTU test port and a circuit breaker test port; the FTU connection port terminals are connected to the FTU test port terminals in a one-to-one correspondence; the circuit breaker connection port terminals are connected to the circuit breaker test port terminals in a one-to-one correspondence; the FTU test port is electrically connected to the operation simulation module of the primary circuit breaker; the circuit breaker test port is electrically connected to the signal acquisition module; the control module is electrically connected to the operation simulation module, the signal acquisition module and the human-computer interaction module of the primary circuit breaker respectively; The operation simulation module of the primary circuit breaker is used to simulate the opening, closing and energy storage of the primary circuit breaker under the control of the remote control master station and the control module; The signal acquisition module is used to collect circuit breaker opening, closing, energy storage signal collection, three-phase voltage signal detection and three-phase current signal detection, and output the detected signals to the control module; The control module is used to receive and process the output signal of the signal acquisition module, and transmit it to the human-machine interaction module for display; the control module converts the instructions input by the human-machine interaction module into corresponding commands to control the operation simulation module action of the primary circuit breaker.

2. The power distribution terminal testing device according to claim 1, characterized in that: The aviation plug connection port includes: a standard voltage socket and a current aviation socket. The corresponding FTU connection port and circuit breaker connection port are also divided into a voltage socket and a current aviation socket. The FTU connection port is connected to the FTU through a set of aviation plug cables. The circuit breaker connection port is connected to the circuit breaker through an in-service aviation plug cable.

3. The power distribution terminal testing device according to claim 1, characterized in that: The operation simulation module of the primary circuit breaker includes: an opening and closing simulation circuit and an energy storage simulation circuit; LED display lights are arranged at the output ends of the opening and closing simulation circuit and the energy storage simulation circuit.

4. The power distribution terminal testing device according to claim 3, characterized in that: The opening and closing simulation circuit includes: a relay RYL1, a diode D1, a transistor Q1, a capacitor C5 and a resistor R10. The relay RYL1 pin 5, pin 7 and pin 6 are respectively connected to the opening FW port, the common terminal YXCOM and the closing HW port. The relay RYL1 pin 8 is connected to the power supply 12V, and the pin 1 is connected to the collector of the transistor Q1. A diode D1 is provided between the collector of the transistor Q1 and the relay RYL1 pin 8, and its cathode is connected to the relay RYL1 pin 8, and its anode is connected to the collector of the transistor Q1; the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is connected to one end of the resistor R10, and the other end of the resistor R10 is connected to the J1 signal terminal output by the control module; the relay RYL1 pin 2, pin 3 and pin 4 are respectively connected to the closing LED display light, the power supply 12V and the opening LED display light; the relay RYL1 pin 8 is grounded through the capacitor C5.

5. The power distribution terminal testing device according to claim 3, characterized in that: The energy storage simulation circuit includes: relay RYL2, diode D2, transistor Q2, capacitor C4 and resistor R11, pin 7 and pin 6 of relay RYL2 are respectively connected to the non-energy stored WCN1 port and the common terminal YXCOM, pin 8 of relay RYL2 is connected to the power supply 12V, pin 1 is connected to the collector of transistor Q2, a diode D2 is provided between the collector of transistor Q2 and pin 8 of relay RYL2, the cathode of which is connected to pin 8 of relay RYL2, and the anode is connected to the collector of transistor Q2; the emitter of transistor Q2 is grounded, the base of transistor Q2 is connected to one end of resistor R11, and the other end of resistor R11 is connected to the J2 signal terminal output by the control module; pin 3 and pin 4 of relay RYL2 are respectively connected to the power supply 12V and the energy storage LED display light; pin 8 of relay RYL2 is grounded through capacitor C4.

6. The power distribution terminal testing device according to claim 1, characterized in that: The signal acquisition module includes: opening, closing, and energy storage signal detection circuits, a three-phase voltage signal detection circuit, and a three-phase current signal detection circuit; the input of the opening signal detection circuit is the opening positive pole FZ+ port and the opening negative pole FZ- port, and the output is the opening signal port FZ_ADCV; a plurality of resistors are connected in series between the opening positive pole FZ+ port and the opening negative pole FZ- port for voltage division, and the last resistor R17 is connected in parallel to an isolation amplifier, and pins 1 and 8 of the isolation amplifier are connected to the power supply 5V1, pins 4, 5, and 6 are grounded, and pins 2 and Pin 3 is connected in parallel to both ends of the last resistor R17, and the end of pin 7 is connected in series with resistor R18, and the end of resistor R18 is a signal output port; the closing signal detection circuit, the energy storage signal detection circuit and the opening signal detection circuit have the same structure, and the difference lies in the different circuit input and output; the input of the closing signal detection circuit is the closing positive pole HZ+ port and the closing negative pole HZ- port, and the output is the closing signal port HZ_ADCV; the input of the energy storage signal detection circuit is the energy storage CN port and the non-energy storage WCN port, and the output is the closing signal port CN_ADCV.

7. The power distribution terminal testing device according to claim 6, characterized in that: The three-phase voltage signal detection circuit has the same structure as the opening signal detection circuit, the difference lies in the number of circuits and the circuit input and output. The three-phase voltage signal detection circuit is divided into three sub-circuits, each sub-circuit detects the voltage signal of one phase respectively, and the inputs of the three sub-circuits are the IA port and the three-phase common terminal I0COM, the IB port and the three-phase common terminal I0COM, and the IC port and the three-phase common terminal I0COM respectively, and the outputs are IA_ADCV, IB_ADCV, and IC_ADCV respectively.

8. The power distribution terminal testing device according to claim 6, characterized in that: The input of the three-phase current signal detection circuit is the current sensor output CI_OUT for collecting the current of the energy storage circuit. A plurality of resistors are arranged between the input of the three-phase current signal detection circuit and the ground for voltage division. The output of the three-phase current signal detection circuit is CI_ADCV. A resistor R7 is connected in series at the front end of IC_ADCV, and the rear end of the resistor R7 is grounded through a capacitor C11.

9. The power distribution terminal testing device according to claim 1, characterized in that: The control module adopts STM32F103C8T6 as the main control chip, and provides a pulse signal to the single motor through a crystal oscillator circuit to drive the single-chip microcomputer to work; the operation simulation module, signal acquisition module and human-computer interaction module output signals of the primary circuit breaker are connected to the single-chip microcomputer, and the single-chip microcomputer performs state judgment and ADC conversion on the output signals of the operation simulation module and signal acquisition module of the primary circuit breaker to obtain the input state and current and voltage values, and then displays these states and data on the liquid crystal screen through the serial port; the output signal of the human-computer interaction module is converted into a corresponding command to control the action of the operation simulation module of the primary circuit breaker.

10. A method for testing a power distribution terminal, using the power distribution terminal testing device according to any one of claims 1 to 9, characterized in that: The steps include: S1. Equipment preparation: connect the distribution terminal test device to the FTUA and circuit breaker; S2. Circuit breaker and aviation plug detection: The circuit breaker connection port is connected to the circuit breaker through the aviation plug line in operation; the circuit breaker test port can use a multimeter to detect the on / off and resistance of the aviation plug line and the control and signal circuits inside the primary circuit breaker to determine whether there are any problems inside the primary circuit breaker and the aviation plug; S3, start the power distribution terminal test device and enter the telemetry test mode. At this time, the circuit breaker connection port is connected to the circuit breaker through the in-service aviation plug line; The signal acquisition module collects the opening, closing and energy storage signals of the circuit breaker, and detects the three-phase voltage and current signals at the same time; The collected signals are transmitted to the control module for processing; Display the signal output by the control module on the LCD screen of the human-computer interaction module in real time; By comparing the device data with the FTUA data and the data received by the remote control master station, verify whether the telemetry data sent by the FTUA is correct; S4, FTUA adds electrical quantity; FTU connection port is connected to FTUA through a set of aviation plug wires; insert the test wire of relay protection tester into FTU test port; Monitor whether the FTUA can respond correctly and provide output signals after receiving electrical quantities; S5, remote control function test: switch to remote control test mode, at this time, the FTU connector is connected to the FTUA through a complete set of aviation plug cables; Input control commands through the remote control master station to control the operation simulation module of the primary circuit breaker to simulate the opening, closing and energy storage actions. By observing the on / off status of the corresponding action LED indicator, it can be judged whether the remote control function is accurate. S6. Remote signaling function test: During the remote control test, the feedback information of the control module to the primary circuit breaker operation simulation module, that is, the action and displacement of the primary circuit breaker operation simulation module, is recorded, and the action and displacement of the primary circuit breaker operation simulation module are compared and analyzed with the action and displacement received by the FTUA and the action and displacement received by the remote control master station to determine whether the remote signaling function is accurate; S7. Data recording: record each test result in the test report.

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