Portable distribution network automation switch simulation test device

Abstract

The utility model discloses a portable distribution network automation switch simulation test device, which structurally comprises a simulation test device, the simulation test device comprises a two-position relay, a signal acquisition and processing module, a loop control module, a remote closing / remote opening terminal and three groups of opening / closing position remote signaling contacts, the two-position relay, the signal acquisition and processing module, the loop control module, the remote closing / remote opening terminal and the opening / closing position remote signaling contact are electrically connected, and the opening / closing position remote signaling contact comprises three tripping switches and three closing switches. The functions of manual tripping / closing, tripping / closing coil resistance, tripping / closing time, single-phase / split-phase action preset selection and the like can be simulated and adjusted through the loop control module and the remote closing / remote opening terminal. The utility model belongs to the field of distribution network test devices, and particularly relates to a portable distribution network automation switch simulation test device.

Description

Technical Field

[0001] The utility model belongs to the field of distribution network test devices, in particular to a portable distribution network automation switch simulation test device. Background Art

[0002] With the promotion of distribution network automation circuit breaker pole-mounted complete sets and the widespread application of distribution network feeder automation, more and more circuit breaker pole-mounted complete sets are put into operation. In the daily operation and management of circuit breaker pole-mounted complete sets, remote control failure, plug-in replacement or setting value modification are often encountered, which require linkage testing of circuit breaker pole-mounted complete sets. As the power supply reliability requirements continue to increase, it is not feasible to perform switch linkage testing of distribution network automation pole-mounted circuit breakers for power outages. Therefore, there is an urgent need to adopt an effective and feasible method to replace the power outage switch linkage testing method of automation pole-mounted complete sets.

[0003] During the linkage test of the operational distribution network automation circuit breaker pole-mounted complete set, because the line cannot be shut down, a backup automated circuit breaker of the same model can be used to replace the operating circuit breaker for the closing and opening linkage test. This achieves the closing and opening linkage test without power outages. However, a subsequent problem arises: the automated pole-mounted complete set weighs 200 kg. Most automated circuit breakers are not installed on the roadside, making it difficult for transport vehicles to directly transport the backup automated circuit breaker to the test site. Four porters are required to move the backup terminal circuit breaker to the test site. Some installation sites are even located on hillsides or in the middle of paddy fields, making transport impossible even with porters. Therefore, the feasibility of this method is greatly reduced. Therefore, a small, portable solution is needed to address this problem. However, the existing wiring method is only suitable for DTUs. The FTU and distribution switch are connected using aviation plugs, and direct wiring is not possible at the terminal blocks. The open / close telesignal circuit on the simulation test device lacks an indicator light, making it difficult to accurately determine the current location of the simulation test device. Utility Model Content

[0004] The technical problems to be solved by the present invention are poor portability, being only applicable to DTU, poor practicality of using aviation plug to connect FTU and distribution switch, and inability to accurately determine the current position of the simulation test device.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is as follows: The portable distribution network automation switch simulation test device proposed in the present invention includes a simulation test device, which includes a double-position relay, a signal acquisition and processing module, a loop control module, a remote closing / remote opening terminal and an open / closed position remote signaling contact. There are three groups of open / closed position remote signaling contacts in total, and the double-position relay, signal acquisition and processing module, loop control module, remote closing / remote opening terminal and open / closed position remote signaling contact are all electrically connected.

[0006] Furthermore, the open / closed position remote signal contact includes a 3-way tripping switch and a 3-way closing switch, which can be simulated and adjusted to the functions of manual tripping / closing, tripping / closing coil resistance, tripping / closing time, and single-phase / split-phase action preset selection through the loop control module and the remote closing / remote opening terminal.

[0007] Furthermore, the simulation test device includes three power supply modes: AC power supply, DC power supply and power supply with an internal lithium iron phosphate battery pack.

[0008] Furthermore, the AC power supply is: AC165V~250V, the DC power supply is: DC10V~60V, and the internal lithium iron phosphate battery pack is equipped with a lithium iron phosphate battery with a capacity of 8Ah.

[0009] Furthermore, the double-position relay adopts a solid-state double-position relay SWZ, and the double-position relay is provided with a normally open contact and a normally closed contact.

[0010] Furthermore, the interface mode of the simulation test device adds an aviation plug interface, which supports connection through a 4m10-core cable and an aviation plug compatible with the FTU box.

[0011] Furthermore, the normally open contact and the normally closed contact of the double-position relay are both connected to the trip voice indicator light.

[0012] The beneficial effects achieved by the utility model using the above structure are as follows:

[0013] 1. The portable distribution network automation switch simulation test device proposed in this proposal utilizes solid-state dual-position relays for its dual-position relays, resulting in the device's advantages of long life, high reliability, high sensitivity, low control power, and excellent electromagnetic compatibility. Because solid-state relays utilize solid-state components, their switching speeds can range from milliseconds to microseconds, enabling rapid switching. Solid-state dual-position relays are highly reliable, require no external power supply, are simple to connect, are portable, and enable non-stop power transmission, significantly saving labor and time, improving work efficiency, and reducing unnecessary power outages and power rerouting operations. This reduces the workload for operations and maintenance teams and significantly reduces the number of households affected by power outages.

[0014] 2. The portable distribution network automation switch simulation test device proposed in this plan realizes convenient connection by connecting the portable distribution network automation switch simulation test device with an aviation plug compatible with FTU and DTU, and achieves interface compatibility with FTU and DTU models of different manufacturers.

[0015] 3. The portable distribution network automation switch simulation test device proposed in this plan realizes convenient connection by connecting the portable distribution network automation switch simulation test device with an aviation plug compatible with FTU and DTU, and achieves interface compatibility with FTU and DTU models of different manufacturers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is the overall principle diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the remote control circuit of the distribution terminal (DTU) of this utility model Figure 1 ;

[0019] Figure 4 This is a schematic diagram of the remote control circuit of the distribution terminal (DTU) of this utility model Figure 2 ;

[0020] Figure 5 This is the wiring diagram of the remote control trip output of the utility model.

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] like Figure 1-5 As shown, the portable distribution network automation switch simulation test device proposed in the utility model includes a simulation test device, which includes a double-position relay, a signal acquisition and processing module, a loop control module, a remote closing / remote opening terminal and an open / closed position remote signaling contact. There are three groups of open / closed position remote signaling contacts. The double-position relay, the signal acquisition and processing module, the loop control module, the remote closing / remote opening terminal and the open / closed position remote signaling contact are all electrically connected. The open / closed position remote signaling contact includes a 3-way tripping switch and a 3-way closing switch. The loop control module and the remote closing / remote opening terminal can be used to simulate and adjust the manual tripping / closing, tripping / closing coil resistance, tripping / closing time, and single-phase / split-phase action preset selection functions to ensure that remote control tests, FA test experiments, and other tasks can be completed smoothly without power outages.

[0024] like Figure 1 、 Figure 2 and Figure 5 As shown, the simulation test device includes three power supply modes: AC power supply, DC power supply, and an internal lithium iron phosphate battery pack. The AC power supply is AC165V~250V; the DC power supply is DC10V~60V. The internal lithium iron phosphate battery pack has a battery capacity of 8Ah and can provide a battery life of ≥10 hours. The open / close position remote signal contacts of the simulation test device simulate the input terminals of the trip / close coil and a set of normally closed and normally open contacts for the circuit breaker position output. By removing the remote signal and remote control contacts from the original switch terminals and connecting them to the remote close / remote open terminals and open / close position remote signal contacts of the simulated switch box, the trip / closing action of the circuit breaker is simulated.

[0025] like Figure 1 、 Figure 2 and Figure 5 As shown, the double-position relay adopts a solid-state double-position relay SWZ. The double-position relay is provided with a normally open contact and a normally closed contact. The HW in the solid-state double-position relay SWZ replaces the closing coil of the automatic circuit breaker, and the FW in the solid-state double-position relay SWZ replaces the opening coil of the automatic circuit breaker to be connected to the closing and opening circuits of the switch contact cable of the distribution terminal, and the normally open contacts and normally closed contacts of the solid-state double-position relay are connected to the remote signal circuit of the switch closing and opening, and the closing and opening signals are fed back to the FTU and the remote signal information is sent up.

[0026] like Figure 1 、 Figure 2 and Figure 5 As shown, the solid-state two-position relay SWZ has no mechanical parts; its contacts function through solid-state devices. With no moving parts, it can operate in high-shock and vibration environments, offering a long service life and high reliability. Furthermore, because it uses solid-state devices, solid-state relays can achieve switching speeds ranging from milliseconds to microseconds. According to circuit breaker maintenance regulations, the three-phase out-of-phase time during tripping must not exceed 10ms, and during closing, it must not exceed 40ms. Therefore, it can completely replace the circuit breaker's closing / opening operation, enabling rapid switching. Solid-state two-position relays offer high reliability, require no external power supply, and are simple to connect and portable.

[0027] like Figure 3 and Figure 4 As shown, connect the simulated test device's trip input to the 1CLP1-2 contact and the common negative to the negative CZD11 contact of the operating power supply on the terminal block. The input must be active, with the "+" pole connected to a high potential and the "-" pole to a low potential. Polarity errors are prohibited. This completes the connection of the portable distribution network automation switch simulation test device, replacing the closing / opening of an already operational circuit breaker.

[0028] like Figure 1-5 As shown, the interface mode of the simulation test device has added an aviation plug interface, which supports connection through a 4m10-core cable and an aviation plug compatible with the FTU box, solving the problem that the FTU cannot be directly connected and improving the adaptability of the distribution terminal. The normally open contact of the solid-state double-position relay is connected to the closing voice indicator to provide a closing position indication, and the normally closed contact of the solid-state double-position relay is connected to the opening voice indicator to provide an opening position indication. When the opening and closing inputs are detected at the same time, the opening and closing indicators flash to prompt an error, so that the simulation test device can not only feedback the position signal to the terminal, but also directly display the current position on the device.

[0029] When used specifically:

[0030] 1. Exit the remote opening / closing outlet pressure plate: Preparation → Repeat → Exit the remote opening pressure plate → Exit the remote closing pressure plate (disconnect the remote control circuit from the operated switch).

[0031] 2. Wiring process: Preparation → Repeat → Connect to remote-disconnection circuit → Connect to remote-closing circuit → Connect to remote-signaling circuit.

[0032] 3. Verification process: Preparation → Master station remote control test / protection setting and simulation test device joint debugging / master station self-healing logic verification, etc.

[0033] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. Portable distribution network automation switch simulation test device, characterized in that: The invention comprises a simulation test device, which comprises a double-position relay, a signal acquisition and processing module, a loop control module, a remote closing / remote opening terminal and an open / closed position remote signaling contact. There are three groups of open / closed position remote signaling contacts in total. The double-position relay, the signal acquisition and processing module, the loop control module, the remote closing / remote opening terminal and the open / closed position remote signaling contact are all electrically connected.

2. The portable distribution network automation switch simulation test device according to claim 1 is characterized in that: The open / close position remote signal contact includes a 3-way trip switch and a 3-way closing switch, which can be simulated and adjusted to the functions of manual tripping / closing, tripping / closing coil resistance, tripping / closing time, and single-phase / split-phase action preset selection through the loop control module and the remote closing / remote opening terminal.

3. The portable distribution network automation switch simulation test device according to claim 2 is characterized in that: The simulation test device includes three power supply modes: AC power supply, DC power supply and power supply with an internal lithium iron phosphate battery pack.

4. The portable distribution network automation switch simulation test device according to claim 3 is characterized in that: The AC power supply is AC165V~250V, the DC power supply is DC10V~60V, and the internal lithium iron phosphate battery pack has a power supply capacity of 8Ah.

5. The portable distribution network automation switch simulation test device according to claim 1 is characterized in that: The double-position relay adopts a solid-state double-position relay SWZ, and the double-position relay is provided with a normally open contact and a normally closed contact.

6. The portable distribution network automation switch simulation test device according to claim 1 is characterized in that: The simulation test device interface mode adds an aviation plug interface, which supports connection through a 4m10-core cable and an aviation plug compatible with the FTU box.

7. The portable distribution network automation switch simulation test device according to claim 5, characterized in that: The normally open contact and the normally closed contact of the double-position relay are both connected to the trip voice indicator light.

Images