Synchronous detection system for double-interval switch of ring main unit

Abstract

The invention discloses a synchronous detection system for double interval switches of a ring main unit. The synchronous detection system comprises control / verification equipment, a high-voltage cabinet and the ring main unit, the high-voltage cabinet comprises an intelligent vacuum circuit breaker array and a plurality of high-voltage side switches, the ring main unit comprises a plurality of ring main unit side switches, and the high-voltage side switches and the ring main unit side switches are in one-to-one correspondence; a three-phase power source of the control / verification equipment is connected with the input end of the intelligent vacuum circuit breaker array, and the output end of the control / verification equipment is connected with the ring main unit; the multiple high-voltage side switches are grouped in pairs, the intelligent vacuum circuit breaker array controls the two high-voltage side switches and the looped network side switch in each group to be synchronously closed, and a test loop between the looped network cabinet and the high-voltage cabinet is established; the control / verification device collects voltage and current values of the two ring network side switches at the same time, calculates voltage and current error values by combining the voltage and current values actually output by the three-phase power source, and judges whether a test loop is qualified or not according to an error calculation result. The two loops can be detected at the same time, so that the detection time is shortened, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to a primary-secondary fusion equipment detection technology, and in particular to a synchronous detection system for double-bay switches in a ring network cabinet. Background Art

[0002] With the continuous deepening of smart grid construction, the intelligent upgrade of distribution networks has become a key trend in the development of the industry. In this context, primary and secondary fusion equipment, as the core component of the smart distribution network, has achieved a high degree of integration between traditional primary equipment (such as circuit breakers, mutual inductors, etc.) and secondary equipment (such as DTU, FTU), which not only promotes the transmission of digital information, but also realizes intelligent control. However, the development of this equipment integration has also brought new challenges to detection work. The traditional separate detection method can no longer meet the needs of comprehensive verification of primary and secondary fusion equipment. There are problems such as low detection efficiency, large influence of human factors, and difficulty in achieving comprehensive verification. Faced with these challenges, the industry urgently needs to develop new detection technologies and methods to improve the degree of automation and accuracy of detection. Therefore, the development of a solution that can realize the simultaneous detection of two interval switches to reduce detection time and detection efficiency is not only of important theoretical significance, but also of extremely high practical value. Summary of the Invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a synchronous detection system for the double-interval switch of the ring network cabinet, which can realize the simultaneous detection of two ring network side switches (the ring network side switch where the current flows in and the ring network side switch where the current flows out) to shorten the detection time and improve the detection efficiency, and solve the technical problem that the traditional method can only detect the interval where the current flows in but cannot detect the interval where the current flows out.

[0004] Technical solution: A synchronous detection system for double-bay switches in a ring main unit of the present invention includes a control / calibration device, a high-voltage cabinet, and a ring main unit;

[0005] The high-voltage cabinet includes an intelligent vacuum circuit breaker array and a plurality of high-voltage side switches arranged at intervals, and the ring network cabinet includes a plurality of ring network side switches arranged at intervals, and the high-voltage side switches and the ring network side switches are connected in a one-to-one correspondence;

[0006] The three-phase power source in the control / verification device is connected to the input end of the intelligent vacuum circuit breaker array, and the output end of the intelligent vacuum circuit breaker array is connected to the ring network cabinet;

[0007] Multiple high-voltage side switches are grouped in pairs, and the intelligent vacuum circuit breaker array is used to control the synchronous closing of two high-voltage side switches and two ring network side switches in each group to establish a test loop between the ring network cabinet and the high-voltage cabinet;

[0008] The control / verification device is used to simultaneously collect the voltage and current values of the two ring network side switches after closing, and calculate the voltage error value and the current error value in combination with the voltage and current values actually output by the three-phase power source, and judge whether the test loop is qualified based on the error calculation results.

[0009] Furthermore, the high-voltage cabinet includes a current booster and a voltage booster, and the three-phase power source in the control / verification device is connected to the input end of the intelligent vacuum circuit breaker array through the current booster and the voltage booster.

[0010] Furthermore, the process of establishing the test loop between the ring main unit and the high voltage cabinet is as follows:

[0011] Select the first high-side switch as the reference switch;

[0012] The voltage and current signals actually output by the three-phase power source in the control / verification device start from the reference switch, enter the ring network side switch corresponding to the reference switch, and then return to the second high-voltage side switch through the adjacent ring network side switch, thereby forming a test loop.

[0013] Furthermore, if the voltage error value or the current error value exceeds the preset error range, the current test loop is marked as abnormal, and a fault report is generated by the control / verification device, and the detection process is interrupted;

[0014] If the voltage error value and the current error value are both within the preset error range, the intelligent vacuum circuit breaker array disconnects the high-voltage side switches of the current group and closes the next group of high-voltage side switches, thereby establishing a new test loop. The loop is executed until all ring network side switches are tested.

[0015] Furthermore, the preset error ranges of the voltage error value and the current error value are both between 0% and 0.500%.

[0016] Furthermore, the control / verification device includes an aviation plug adapter box and a plurality of different control / verification circuits, and the aviation plug adapter box is switched to connect with different control / verification circuits through a plurality of relay modules inside the aviation plug adapter box;

[0017] A plurality of the ring network side switches are connected to the aerial plug adapter box.

[0018] Furthermore, the multiple control / verification circuits include a primary detection circuit, a secondary detection circuit, and a complete detection circuit, and each relay module in the multiple relay modules controls the primary detection circuit, the secondary detection circuit, and the complete detection circuit accordingly.

[0019] Furthermore, when the relay module is switched to connect to the primary detection circuit, the secondary sides of the current transformers of the two ring network side switches are respectively connected to the transformer calibrator and the load box in the control / calibration equipment;

[0020] When the relay module is switched to be connected to the secondary detection circuit, the secondary signals of the two ring network side switches are respectively connected to the relay protection instrument and the line loss module in the control / verification equipment.

[0021] Furthermore, when the relay module switches to the complete detection circuit, the primary circuits of the two ring network side switches form a closed loop path with the three-phase power source through the high-voltage side switch, and the secondary circuits of the two ring network side switches are respectively connected to the relay protection instrument and the transformer calibrator through the aviation plug-in adapter box.

[0022] Furthermore, the control / verification device includes a first ring main unit aviation plug wiring chassis and a second ring main unit aviation plug wiring chassis;

[0023] The first ring network cabinet aviation plug wiring chassis includes a first current aviation plug and a first voltage aviation plug, the first current aviation plug is connected to the current interface on the switch side of the ring network cabinet, and the first voltage aviation plug is connected to the voltage interface on the switch side of the ring network cabinet;

[0024] The second ring network cabinet aerial plug wiring chassis includes a second current aerial plug and a second voltage aerial plug. The second current aerial plug is connected to the current interface of the distribution automation terminal, and the second voltage aerial plug is connected to the voltage interface of the distribution automation terminal.

[0025] Beneficial effects: Compared with the prior art, the significant technical effects of the present invention are as follows: (1) The present invention can establish a test loop by grouping the high-voltage side intervals into two groups and using an intelligent vacuum circuit breaker array to achieve synchronous closure. One test loop will pass through two ring network side switches, thereby realizing parallel detection of the two ring network side switches. The system collects the voltage and current values of the ring network side intervals in real time through the control / verification equipment, and performs error comparison calculation with the actual output value of the three-phase power source to ensure the accuracy of the detection results. If the error is detected to be beyond the preset range, the system will automatically mark the abnormality and generate a fault report, and interrupt the detection process at the same time, thereby effectively avoiding misjudgment and missed detection. If the error is within the allowable range, the intelligent vacuum circuit breaker array will automatically switch to the next group of intervals and continue detection until all intervals are completed. (2) The present invention adopts intelligent closed-loop path switching logic and automatic control, which reduces manual intervention and reduces the error rate of human operation, while ensuring the safety and stability of the detection process. In this way, the present invention not only improves the detection efficiency, but also significantly improves the reliability and accuracy of the detection, providing a more efficient and safer solution for the maintenance and operation of the ring network cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2This is a schematic diagram of the test loop formed between the high-voltage cabinet and the ring main cabinet;

[0028] Figure 3 Schematic diagram of different test circuits;

[0029] Figure 4 It is the workflow diagram of the present invention. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is described in detail below in conjunction with specific implementation methods and the accompanying drawings.

[0031] like Figure 1 As shown, the synchronous detection system of the double-interval switch of the ring network cabinet of the present invention includes a control / verification device, a high-voltage cabinet and a ring network cabinet. The control / verification device is communicatively connected to the high-voltage cabinet, and the high-voltage cabinet is connected to the ring network cabinet. The system realizes an efficient and automated detection function through the coordinated work of the control / verification device and the high-voltage cabinet. The high-voltage cabinet includes a current booster, a voltage booster, an intelligent vacuum circuit breaker array and a plurality of high-voltage side switches arranged at intervals. The ring network cabinet includes a plurality of ring network side switches arranged at intervals, and the high-voltage side switches and the ring network side switches are connected one-to-one. The three-phase power source in the control / verification device is connected to the input end of the intelligent vacuum circuit breaker array through the current booster and the voltage booster, and the output end of the intelligent vacuum circuit breaker array is connected to the ring network cabinet.

[0032] Multiple high-voltage side switches are grouped in pairs, and an intelligent vacuum circuit breaker array is used to control the synchronous closing of two high-voltage side switches and two ring-main-side switches in each group to establish a test loop between the ring main unit and the high-voltage cabinet. In this embodiment, the test loop between the ring main unit and the high-voltage cabinet is established as follows: the first high-voltage side switch is selected as the reference switch; the voltage and current signals actually output by the three-phase power source in the control / verification device are transmitted from the reference switch to the ring-main-side switch corresponding to the reference switch, and then return to the second high-voltage side switch through the adjacent ring-main-side switch, thus forming a test loop.

[0033] The control / verification device is used to simultaneously collect the voltage and current values of the two ring network side switches after closing, and calculate the voltage error value and current error value in combination with the voltage and current values actually output by the three-phase power source, and judge whether the test loop is qualified based on the error calculation results; specifically as follows: the control / verification device can simultaneously collect the voltage and current values of the two ring network side switches, and perform error comparison calculation with the voltage and current values actually output by the three-phase power source to judge whether the current test loop is within the preset error range. If the voltage error value or the current error value exceeds the preset error range, the current test loop is marked as abnormal, and a fault report is generated through the control / verification device, and the detection process is interrupted at the same time; if the voltage error value and the current error value are both within the preset error range, the high-voltage side switch of the current group is disconnected by the intelligent vacuum circuit breaker array, and the next group of high-voltage side switches is closed, thereby establishing a new test loop, and the cycle is executed until all ring network side switches are detected.

[0034] The intelligent vacuum circuit breaker array issues a switching command to control the high-voltage cabinet to open the current set of high-voltage side switches and close the next set of high-voltage side switches.

[0035] Through intelligent control and data acquisition, the system can simultaneously test two ring main unit switches, significantly improving detection efficiency and reliability while reducing manual intervention and ensuring the safety and accuracy of the detection process. The system achieves efficient and automated testing through the coordinated operation of control / calibration equipment and high-voltage cabinets.

[0036] In addition, the system of the present invention also includes a switching unit and a status indicator light. The switching unit is provided with a first interface, a second interface and a third interface, which are respectively connected to the A, B, and C three-phase circuits of the ring network cabinet and the status indicator light is used to display the detection status and circuit combination status of the current test circuit.

[0037] The right side of the system houses a control / verification device, integrating a power management module, controller, and communication interface. These components ensure stable system operation and efficient data transmission. This automated inspection process not only improves inspection efficiency but also reduces manual labor, ensuring inspection quality and safety.

[0038] The control / verification equipment includes an aerial plug adapter box and multiple different control / verification circuits. The aerial plug adapter box uses multiple internal relay modules to switch to different control / verification circuits. Multiple ring network switches are connected to the aerial plug adapter box. The multiple control / verification circuits include a primary detection circuit, a secondary detection circuit, and a complete detection circuit. Each of the multiple relay modules controls a corresponding primary detection circuit, a secondary detection circuit, and a complete detection circuit.

[0039] When the relay module is switched to connect to the primary detection circuit, the current measuring secondary parts of the two ring network side switches are respectively connected to the transformer calibrator and the load box in the control / calibration equipment; when the relay module is switched to connect to the secondary detection circuit (such as DTU), the secondary signals of the two ring network side switches are respectively connected to the relay protection instrument and the line loss module in the control / calibration equipment; when the relay module is switched to the complete detection circuit, the primary circuits of the two ring network side switches form a closed-loop path with the three-phase power source through the high-voltage side switch, and the secondary circuits of the two ring network side switches are respectively connected to the relay protection instrument and the transformer calibrator through the aviation plug adapter box. This design enables the system to quickly switch between different detection modes, meeting diverse detection needs. The present invention realizes dual-interval synchronous detection, and supports primary, secondary and complete detection scenarios to ensure detection accuracy and safety.

[0040] like Figure 3 As shown, when performing the first test (the primary part of the ring main unit, such as the circuit breaker and transformer), the circuit does not need to pass through the DTU. The tested circuit 1 (circuit 1 of the ring main unit) is connected to the corresponding load box and transformer calibrator, and the tested circuit 2 is connected to another set of load boxes and transformer calibrators. At this time, the two transformer calibrators can simultaneously calibrate the transformer accuracy of circuits 1 and 2, completing the purpose of simultaneous testing. When performing the second test (the secondary part of the ring main unit, such as the DTU), only the DTU is tested in this circuit. At this time, the aerial plug adapter box switches the two ring main side switches to the circuit 1 relay and the circuit 2 relay respectively. At this time, the two circuits can be tested simultaneously and tested separately, achieving the purpose of simultaneous testing. When performing a complete set of tests (simultaneously testing the primary and secondary parts of the ring main unit), the primary ring main unit and DTU circuits are connected at the same time, and the two parts are tested as a whole. The tested circuits 1 and 2 are tested simultaneously and tested separately, achieving the purpose of simultaneous testing.

[0041] In this embodiment, the control and calibration equipment primarily includes a three-phase power source, two 0.05-class transformer calibrators, load boxes (two three-phase electromagnetic current load boxes, two three-phase electromagnetic voltage load boxes, two electromagnetic zero-sequence current and voltage load boxes, and two electronic load boxes), two standard meters, two relays, and two 21-version rectangular ring main unit (RMU) plug-in wiring enclosures (a first RMU plug-in wiring enclosure and a second RMU plug-in wiring enclosure). The first RMU plug-in wiring enclosure and the second RMU plug-in wiring enclosure are used to switch the RMU's detection circuit.

[0042] Among them, the first ring network cabinet aviation plug wiring chassis includes a first current aviation plug and a first voltage aviation plug, the first current aviation plug is connected to the current interface of the ring network cabinet switch side, and the first voltage aviation plug is connected to the voltage interface of the ring network cabinet switch side. The second ring network cabinet aviation plug wiring chassis includes a second current aviation plug and a second voltage aviation plug, the second current aviation plug is connected to the current interface of the distribution automation terminal (DTU), and the second voltage aviation plug is connected to the voltage interface of the distribution automation terminal (DTU). The first ring network cabinet rectangular aviation plug wiring chassis and the second ring network cabinet rectangular aviation plug wiring chassis can ensure a stable connection between the ring network cabinet and the control / verification equipment, providing reliable interface support for the normal operation of the system. Compared with the traditional switching box, the embodiment of the present invention adopts a single ring network side switch independent loop switching method. Each ring network side switch will switch to the corresponding control / verification equipment. For example, when performing transformer accuracy detection, the switch 1 under test will switch to the transformer calibrator 1, and the switch 2 under test will switch to the transformer calibrator 2, thereby achieving the purpose of simultaneous detection of two intervals.

[0043] In this embodiment, the high-voltage cabinet is a high-voltage output cabinet with 6 high-voltage side switches. Six 12kV vacuum circuit breakers and six sets of high-voltage and high-current output copper bars are installed in the cabinet. Among them, the six 12kV vacuum circuit breakers form an intelligent vacuum circuit breaker array. In order to achieve the purpose of simultaneous detection, Figure 2 As shown, the six high-voltage side switches are divided into three groups. Each time, the vacuum circuit breaker is controlled to open and close, and the switching circuit is switched to detect two intervals at the same time. A total of three times can complete the ring main unit detection, thus shortening the time by half.

[0044] like Figure 4 As shown in the figure, the process of simultaneous detection of the ring network cabinet is as follows:

[0045] Step 1: When establishing a test loop between the ring main unit and the high-voltage cabinet, the system selects the first high-voltage side switch as the reference interval. The voltage and current signals actually output by the three-phase power source start from this reference interval, enter the corresponding ring main unit switch, and then return to the second high-voltage side switch through the adjacent ring main unit switch, forming a closed-loop test path.

[0046] In this embodiment, the high-voltage side switches include high-voltage side switches 1 through 6, and the ring network side switches include ring network side switches 1 through 6. The high-voltage side switches correspond one-to-one to the ring network side switches: high-voltage side switch 1 corresponds to ring network side switch 1, high-voltage side switch 2 corresponds to ring network side switch 2, and high-voltage side switch 6 corresponds to ring network side switch 6.

[0047] Once the test loop is established, the system controls the three-phase power source in the control / calibration equipment to output standard voltage and current signals. The voltage and current signals originate from the No. 1 high-voltage side switch (reference switch) of the high-voltage cabinet, enter the No. 1 ring-side switch of the ring main unit, and then return to the No. 2 high-voltage side switch of the high-voltage cabinet through the No. 2 ring-side switch of the ring main unit, completing a closed-loop path. This closed-loop path ensures that the signal can flow through the test loop, thereby effectively testing the No. 1 and No. 2 high-voltage side switches. For example, it can detect whether the signal flows smoothly in the loop and whether there are any voltage or current anomalies, which are important parameters for evaluating the health of the ring main unit.

[0048] Step 2: The control / verification device simultaneously collects the voltage and current values of the two ring network side switches, and performs error comparison calculation on them with the voltage and current values actually output by the three-phase power source. Based on the error comparison result, it is determined whether the current test loop is within the predetermined error range, thereby determining whether the test loop is qualified.

[0049] The expressions for error comparison calculation are:

[0050]

[0051] Among them, η1 represents the voltage error value; U m Indicates the actual voltage; U n Indicates standard voltage; U indicates rated voltage; η2 indicates current error value; I m Indicates the actual current; I n Indicates standard current; I indicates rated current.

[0052] It should be noted that the preset error ranges of the voltage error value and the current error value are both between 0% and 0.500%, which ensures high accuracy and reliability of the detection results.

[0053] In this embodiment, taking the No. 1 interval of the high-voltage cabinet as the reference interval, the real-time data of the voltage, current and other electrical parameters of the 1# ring network side switch and the 2# ring network side switch of the ring network cabinet are collected, and compared with the real-time data of the electrical parameters output by the three-phase power source, the accuracy of the ring network cabinet data is calculated, and the data acquisition module is started to record the corresponding voltage and current parameters. For example, the output voltage of the three-phase power source is: U a =4619.200,u b =4619.200,u v =4619.200, the actual value of the three-phase power source is: U a =4636.371V, U b =4636.371V, U c =4636.371V, and then read the data collected by the ring network cabinet as Ua =4666.250V, U b =4666.250V, U c =4666.250V. Based on the actual value and the value collected by the ring network cabinet, the control host calculates the error, and the difference is 0.365%, which is within the range of the voltage error value.

[0054] Step 3: After completing the current test loop, the system uses the intelligent vacuum circuit breaker array to disconnect the current high-voltage switch and close the next high-voltage switch. This process involves the intelligent vacuum circuit breaker array issuing switching commands, controlling the high-voltage cabinet to disconnect the current high-voltage switch and close the next high-voltage switch. This automated switching mechanism significantly improves testing efficiency, reduces manual intervention, and ensures the continuity and stability of the testing process.

[0055] For example, after the current test loop detection is completed, the system first turns off the three-phase power output, and then switches the high-voltage cabinet. The system controls the high-voltage side switches No. 1 and No. 2 of the high-voltage cabinet to perform opening operations, and controls the high-voltage side switches No. 3 and No. 4 to perform closing operations to establish the test loop of the high-voltage side switches No. 3 and No. 4.

[0056] It should be noted that during the entire process, the system always maintains safety monitoring, and a safety status confirmation is performed before each circuit switch. Once an abnormality is found, the detection process can be immediately interrupted.

[0057] Step 4: After all test items are completed, restore the high-voltage cabinet switch status, turn off the three-phase power source, disconnect the network port and serial port communication, and the staff can dismantle the ring main cabinet and replace it with another one to continue testing.

[0058] The control / verification device not only controls the output of the three-phase power source module but also controls the opening and closing of the high-voltage side switches via an intelligent vacuum circuit breaker array, thereby connecting or disconnecting the test circuit. During the test process, the control host automatically issues commands to control the opening and closing of the high-voltage side switches according to a preset test sequence, enabling the test circuit to be connected or disconnected sequentially, thus automatically switching and testing each switch in the ring main unit. This system can automatically test both switches in the ring main unit simultaneously, greatly improving testing efficiency. By configuring each switch with separate verification equipment (transformer calibrator, load box, line loss error calculation module, relay protection device, etc.), simultaneous testing of both switches is achieved. This automated testing process not only implements the innovative "simultaneous testing of two switches" model, but also ensures test quality and operational safety through standardized procedures and multiple protection mechanisms. This significantly improves the efficiency and reliability of ring main unit testing, providing a new solution for the development of ring main unit testing technology.

Claims

1. A synchronous detection system for double-bay switches in a ring main unit, characterized by: Including control / calibration equipment, high voltage cabinet and ring main cabinet; The high-voltage cabinet includes an intelligent vacuum circuit breaker array and a plurality of high-voltage side switches arranged at intervals, and the ring network cabinet includes a plurality of ring network side switches arranged at intervals, and the high-voltage side switches and the ring network side switches are connected in a one-to-one correspondence; The three-phase power source in the control / verification device is connected to the input end of the intelligent vacuum circuit breaker array, and the output end of the intelligent vacuum circuit breaker array is connected to the ring network cabinet; Multiple high-voltage side switches are grouped in pairs, and the intelligent vacuum circuit breaker array is used to control the synchronous closing of two high-voltage side switches and two ring network side switches in each group to establish a test loop between the ring network cabinet and the high-voltage cabinet; The control / verification device is used to simultaneously collect the voltage and current values of the two ring network side switches after closing, and calculate the voltage error value and the current error value in combination with the voltage and current values actually output by the three-phase power source, and judge whether the test loop is qualified based on the error calculation results.

2. The synchronous detection system for double-bay switches of a ring main unit according to claim 1, characterized in that: The high-voltage cabinet includes a current booster and a voltage booster, and the three-phase power source in the control / verification device is connected to the input end of the intelligent vacuum circuit breaker array through the current booster and the voltage booster.

3. The synchronous detection system for double-bay switches of a ring main unit according to claim 1, characterized in that: The process of establishing the test circuit between the ring main unit and the high voltage cabinet is as follows: Select the first high-side switch as the reference switch; The voltage and current signals actually output by the three-phase power source in the control / verification device start from the reference switch, enter the ring network side switch corresponding to the reference switch, and then return to the second high-voltage side switch through the adjacent ring network side switch, thereby forming a test loop.

4. The synchronous detection system for double-bay switches of a ring main unit according to claim 1, characterized in that: If the voltage error value or the current error value exceeds the preset error range, the current test loop is marked as abnormal, and a fault report is generated through the control / verification device, and the detection process is interrupted; If the voltage error value and the current error value are both within the preset error range, the intelligent vacuum circuit breaker array disconnects the high-voltage side switches of the current group and closes the next group of high-voltage side switches, thereby establishing a new test loop. The loop is executed until all ring network side switches are tested.

5. The synchronous detection system for double-bay switches of a ring main unit according to claim 4, characterized in that: The preset error ranges of the voltage error value and the current error value are both between 0% and 0.500%.

6. The synchronous detection system for double-bay switches of a ring main unit according to claim 1, characterized in that: The control / verification device includes an aviation plug adapter box and a plurality of different control / verification circuits, and the aviation plug adapter box is switched to connect with different control / verification circuits through a plurality of relay modules inside the box; A plurality of the ring network side switches are connected to the aerial plug adapter box.

7. The synchronous detection system for double-bay switches of a ring main unit according to claim 6, characterized in that: The multiple control / verification circuits include a primary detection circuit, a secondary detection circuit, and a complete detection circuit. Each relay module in the multiple relay modules controls the primary detection circuit, the secondary detection circuit, and the complete detection circuit accordingly.

8. The synchronous detection system for double-bay switches of a ring main unit according to claim 7, characterized in that: When the relay module is switched to connect to the primary detection circuit, the secondary sides of the current transformers of the two ring network side switches are connected to the transformer calibrator and the load box in the control / calibration equipment respectively; When the relay module is switched to be connected to the secondary detection circuit, the secondary signals of the two ring network side switches are respectively connected to the relay protection instrument and the line loss module in the control / verification equipment.

9. The synchronous detection system for double-bay switches of a ring main unit according to claim 7, characterized in that: When the relay module switches to the complete detection circuit, the primary circuits of the two ring network side switches form a closed loop path with the three-phase power source through the high-voltage side switch, and the secondary circuits of the two ring network side switches are respectively connected to the relay protection instrument and the transformer calibrator through the aviation plug-in adapter box.

10. The synchronous detection system for double-bay switches of a ring main unit according to claim 1, characterized in that: The control / verification equipment includes a first ring main unit aviation plug wiring chassis and a second ring main unit aviation plug wiring chassis; The first ring network cabinet aviation plug wiring chassis includes a first current aviation plug and a first voltage aviation plug, the first current aviation plug is connected to the current interface on the switch side of the ring network cabinet, and the first voltage aviation plug is connected to the voltage interface on the switch side of the ring network cabinet; The second ring network cabinet aerial plug wiring chassis includes a second current aerial plug and a second voltage aerial plug. The second current aerial plug is connected to the current interface of the distribution automation terminal, and the second voltage aerial plug is connected to the voltage interface of the distribution automation terminal.

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