A substation secondary system on-line monitoring device

Abstract

The application discloses a kind of substation secondary system online monitoring devices, it is related to substation secondary system online monitoring technical field, and monitoring terminal protection mechanism includes installation shell, the top of the installation shell is provided with opening, and the front side of installation shell is provided with front through slot, and front through slot is step groove, and the position of the front side in installation shell is provided with mesh placing plate at the bottom of front through slot, and secondary system online monitoring terminal is placed on mesh placing plate, monitoring terminal fastening mechanism is installed in installation shell, and the top rear side of secondary system online monitoring terminal is matched with monitoring terminal fastening mechanism and is clamped;Cable inner end limiting mechanism is arranged in installation shell.The substation secondary system online monitoring device, secondary equipment is overall coordinated smoothly, beneficial to give full play to the technical advantage of intelligent substation, can realize the modularization of secondary equipment installation, and the line after wiring is easy to arrange, and secondary system online monitoring terminal can be quickly air supply heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of online monitoring technology for substation secondary systems, specifically to an online monitoring device for substation secondary systems. Background Technology

[0002] Currently, the management and maintenance of smart substations are of great importance. In order to further improve the operational reliability of smart substations, online monitoring and fault diagnosis of secondary equipment within the substation has become an important means of daily operation and maintenance of smart substations in the future.

[0003] The existing secondary systems of smart substations lack overall coordination among secondary equipment, failing to fully leverage the technological advantages of smart substations. Furthermore, the secondary systems of smart substations use online monitoring terminals for information processing and analysis, which connect to numerous acquisition units and other secondary equipment. This results in numerous wiring connections on the online monitoring terminals, leading to chaotic wiring in existing technologies. This makes it difficult to manage wiring when expanding networks and secondary equipment, affecting the efficiency of secondary wiring. In addition, the online monitoring terminals have a high load and concentrated heat generation, which can affect their normal operation. Summary of the Invention

[0004] The technical problem to be solved by this invention is to overcome the existing defects and provide an online monitoring device for substation secondary systems. The device ensures smooth overall coordination between secondary equipment, which is conducive to giving full play to the technical advantages of smart substations. It can realize the modular installation of secondary equipment, and the wiring after connection is easy to manage. It is convenient and quick to rewire the online monitoring terminal of the secondary system, which can improve the wiring efficiency. It can also quickly provide air supply and heat dissipation for the online monitoring terminal of the secondary system, avoiding the impact of heavy load on the online monitoring terminal's normal operation. It can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an online monitoring device for a substation secondary system, comprising:

[0006] The monitoring terminal protection mechanism includes a mounting shell, a front through groove, side dovetail grooves, a top cover, dovetail slides, a mesh placement plate, a wire-passing rectangular through groove, and a lower sealing seat. The top of the mounting shell has an opening, and the front through groove is a stepped groove. A mesh placement plate is located at the bottom of the front through groove inside the mounting shell, and a secondary system online monitoring terminal is placed on the mesh placement plate. The front through groove is configured to cooperate with the front end of the secondary system online monitoring terminal. Side dovetail grooves are respectively opened on both sides of the top of the mounting shell. Dovetail slides are respectively provided on both sides of the top cover and are longitudinally slidably connected to the side dovetail grooves. Wire-passing rectangular through grooves are opened at equal intervals on the rear side of the mounting shell. A lower sealing seat is engaged at the bottom of the wire-passing rectangular through groove, and an arc-shaped wire-holding groove is provided on the top of the lower sealing seat.

[0007] The monitoring terminal fastening mechanism is installed inside the mounting housing, and the monitoring terminal fastening mechanism is engaged with the top rear side of the secondary system online monitoring terminal;

[0008] The inner end limiting mechanism of the cable is set inside the mounting shell, and the inner end limiting mechanism of the cable is located on the rear side of the mesh placement plate;

[0009] The excess wire organization and storage mechanism is installed inside the rear of the mounting housing.

[0010] The secondary system online monitoring terminal is housed within a mounting housing, which protects it. The top cover slides along a side dovetail groove via a dovetail slide bar, allowing an opening at the top of the housing for arranging the online monitoring terminal or for wiring at its rear. A mesh plate facilitates upward airflow to the terminal, dissipating heat. A rectangular cable tray allows cables connecting to the rear of the terminal to pass through, and a lower sealing seat seals the gap between the cable and the bottom of the tray, preventing debris from entering. Inside the housing, the monitoring terminal fastening mechanism presses the secondary system online monitoring terminal forward within the housing, ensuring the control panel on the front side of the terminal is securely positioned in the front slot. The control panel can be operated through the front slot, preventing the terminal from moving within the housing. A cable end limiting mechanism secures the end of the cable closest to the terminal. A slack cable organization and storage mechanism neatly organizes excess cable within the rear of the housing, facilitating cable management and making rewiring easier and more efficient.

[0011] Furthermore, the cable inner end limiting mechanism includes a wire plate, wire holes, and wire-passing vertical slots. A vertical wire plate is fixedly connected inside the mounting housing, located behind the mesh placement plate. The top of the wire plate is horizontally lower than the top surface of the mounting housing. Horizontally equidistant wire-passing vertical slots are formed on the top of the wire plate, and horizontally equidistant wire holes are formed in the middle of the wire plate. The wire holes and wire-passing vertical slots are alternately distributed. The wire plate separates the front and rear sides of the mounting housing. The chamber on the front side of the mounting housing is used to install the secondary system online monitoring terminal, and the chamber on the rear side of the mounting housing is used to store and organize cables. The wire holes and wire-passing vertical slots allow different types of cables to pass through.

[0012] Furthermore, the cable inner end limiting mechanism also includes a rubber plug and a cross-shaped through hole. The rubber plug is placed inside the cable hole, with circular grooves at both its front and rear ends, and a cross-shaped through hole in its center. The rubber plug seals the cable hole, and the cross-shaped through hole allows the cable to pass through it. The cross-shaped through hole reduces the gap between the cable and the rubber plug, allowing the cable to be stably secured within the through hole.

[0013] Furthermore, the cable inner end limiting mechanism also includes a snap-fit ​​groove, a rubber stop strip, a rubber clip, and a wire guide slot. Snap-fit ​​grooves are respectively provided on both sides of the wire guide vertical groove. A rubber stop strip is provided inside the wire guide vertical groove, and rubber clips that engage with the snap-fit ​​grooves are respectively provided on both sides of the rubber stop strip. Wire guide slots are vertically spaced at equal intervals on the rubber stop strip. The snap-fit ​​grooves are used to engage the rubber clips on the sides of the rubber stop strip, facilitating the stable placement of the rubber stop strip into the wire guide vertical groove. The cable passes through the wire guide slots on the rubber stop strip, which are more suitable for passing flat cables.

[0014] Furthermore, the excess wire organizing and storage mechanism includes a horizontal adjustment component, a fixed base, a support column, an anti-detachment ring, a winding drum, a limiting sleeve, and a wire clamp. The horizontal adjustment component is provided at the bottom rear side of the mounting housing. Fixed bases are provided at equal horizontal distances on the horizontal adjustment component. The bottom of the support column is fixedly connected to the fixed base. The top of the support column extends into the winding drum and is threadedly connected to the anti-detachment ring. The upper and lower ends of the winding drum are respectively fixedly sleeved with limiting sleeves. Wire clamps are provided on opposite sides of the two limiting sleeves.

[0015] The horizontal adjustment component can adjust the position of the fixed base. The winding drum can move up and down along the support column. When the cable is too long, the winding drum is lifted up along the support column and extended out of the mounting shell. The anti-detachment ring prevents the winding drum from being lifted too high and detaching from the support column. The excessively long cable is wound onto the winding drum, and then the winding drum is pressed down to retract into the mounting shell. The winding drum is provided with friction thread texture, which helps the cable to be wound stably onto the winding drum. The limiting sleeve winds the cable wound at the end of the winding drum. The wire clamp can lock the end of the wound cable to prevent the cable from unraveling on the winding drum after releasing the hand.

[0016] Furthermore, it also includes an air intake and heat dissipation mechanism. The air intake and heat dissipation mechanism is embedded in the bottom of the mounting shell at the position corresponding to the mesh placement plate. The air intake and heat dissipation mechanism blows air into the mounting shell, sending external air into the mounting shell to remove the heat generated by the secondary system online monitoring terminal.

[0017] Furthermore, it also includes an exhaust and heat dissipation mechanism, which is installed at the bottom rear side of the mounting housing and exhausts air to the outside of the rear side of the mounting housing, thus facilitating the discharge of hot air from inside the mounting housing.

[0018] Furthermore, it also includes a cable outer end fastening mechanism, which includes a sliding limit component, a fastening back cover, a fastening groove, an upper sealing seat, and a ventilation component. The fastening back cover is vertically slidably installed on the rear side of the mounting shell through the sliding limit component. The fastening back cover has a fastening groove corresponding to the through rectangular groove for threading the wire. An upper sealing seat is fixed at the top of the fastening groove. An arc-shaped wire-locking groove is provided at the bottom of the upper sealing seat. A ventilation component corresponding to the exhaust and heat dissipation mechanism is provided at the bottom of the fastening back cover.

[0019] The sliding limit assembly allows the fastening back cover to move smoothly up and down along the rear side of the mounting housing. When the fastening back cover moves upward along the sliding limit assembly, the cable can be passed through the fastening cable groove and the cable-passing rectangular through groove. Then, the fastening back cover moves downward, and the arc-shaped cable-clamping groove 2 at the bottom of the upper sealing seat mates with the upper side of the cable, while the arc-shaped cable-clamping groove 1 on the upper side of the lower sealing seat mates with the bottom of the cable. The upper and lower sealing seats are used to clamp the cable on both sides, and at the same time, the gap between the cable and the cable-passing rectangular through groove is sealed. After the fastening back cover moves to the bottom, the ventilation assembly corresponds to the exhaust heat dissipation mechanism, without affecting the exhaust heat dissipation mechanism's discharge.

[0020] Furthermore, the logical architecture of the substation secondary system online monitoring device is as follows: the substation secondary system online monitoring information is collected and processed in a hierarchical manner. The collection unit collects network information from the station control layer, network information from the process layer, and equipment information from the process layer, and connects to the secondary system online monitoring terminal via the network. The secondary system online monitoring terminal communicates with the application server / integrated application host through the DL / T 860 protocol, and uploads the analysis results of the secondary system online monitoring terminal to the central control station through the Zone II communication gateway.

[0021] Furthermore, the secondary system online monitoring terminal communicates bidirectionally with the secondary equipment in Security Zone I through the firewall between Security Zone I and Security Zone II, and collects information data from the monitoring host, communication gateway, relay protection and stability device, measurement and control device, and synchronous phasor measurement module in Security Zone I;

[0022] The acquisition unit is a secondary system online monitoring acquisition unit. The secondary system online monitoring acquisition unit directly monitors the MMS and GOOSE communication messages of the station control layer network in real time through the mirror port of the switch in the station control layer of Security Zone I using a one-way communication method.

[0023] The secondary system online monitoring and acquisition unit directly collects process layer GOOSE and SV network communication message data from the switches of each voltage level process layer, and monitors the operation information, alarm information and monitoring information of intelligent terminals and merging units in process layer equipment in real time;

[0024] The metering system, fault location module, power quality online monitoring module, and network security device mainly collect hard contact information through the measurement and control device and forward it to the secondary system online monitoring terminal.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: This online monitoring device for the secondary system of a substation has the following advantages:

[0026] 1. The top cover slides along the side dovetail groove via a dovetail slide bar, thereby opening the top of the mounting housing for arranging the secondary system online monitoring terminal or wiring at the rear end of the secondary system online monitoring terminal. The mesh placement plate facilitates airflow from bottom to top to the secondary system online monitoring terminal, carrying away the heat generated by the secondary system online monitoring terminal. The rectangular through-slot allows the cable connected to the rear end of the secondary system online monitoring terminal to pass through. The lower sealing seat helps to seal the gap between the cable and the bottom of the rectangular through-slot, preventing debris from entering the mounting housing. The monitoring terminal fastening mechanism presses the secondary system online monitoring terminal forward within the mounting housing, ensuring that the control panel on the front side of the secondary system online monitoring terminal is securely positioned in the front through-slot. The control panel of the secondary system online monitoring terminal can be operated through the front through-slot.

[0027] 2. The inner end limiting mechanism of the cable is used to clamp and limit the end of the cable that is close to the online monitoring terminal of the secondary system. The excess cable organizing and storage mechanism is used to store and organize the redundant part of the cable into the rear end of the mounting shell. The cable is easy to manage, the cable connected to the online monitoring terminal of the secondary system is neat, and it is easy to reconnect to additional secondary equipment.

[0028] 3. The overall coordination between secondary equipment is smooth, which is conducive to giving full play to the technical advantages of intelligent substations. It can realize the modular installation of secondary equipment, and the wiring after connection is easy to manage. It is convenient and quick to rewire the secondary system online monitoring terminal, which can improve the wiring efficiency. It can also quickly supply air and heat the secondary system online monitoring terminal, avoiding the impact of heavy load on the secondary system online monitoring terminal on its normal operation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the online monitoring terminal of the secondary system of the present invention;

[0030] Figure 2 This is a schematic diagram of the rear view structure of the online monitoring terminal of the secondary system of the present invention;

[0031] Figure 3 This is a schematic diagram of the rear-view structure of the online monitoring terminal of the secondary system of the present invention;

[0032] Figure 4 This is a schematic diagram of the internal structure of the online monitoring terminal of the secondary system of the present invention;

[0033] Figure 5 This is a top view of the rear structure of the online monitoring terminal of the secondary system of the present invention;

[0034] Figure 6 This is a partial structural diagram of the online monitoring terminal of the secondary system of the present invention;

[0035] Figure 7 This is a partial cross-sectional structural diagram of the online monitoring terminal of the secondary system of the present invention;

[0036] Figure 8 This is a cross-sectional structural diagram of the residual wire sorting and storage mechanism of the secondary system online monitoring terminal of the present invention;

[0037] Figure 9 This is a schematic diagram of the logical architecture of the present invention;

[0038] Figure 10 This is a schematic diagram of the network architecture of the present invention;

[0039] Figure 11 This is a schematic diagram of a typical 330kV and above substation scheme of the present invention;

[0040] Figure 12 This is a schematic diagram of a typical 220kV substation scheme of the present invention;

[0041] Figure 13 This is a schematic diagram of a typical substation scheme of 110kV and below according to the present invention.

[0042] In the diagram: 1. Secondary system online monitoring terminal; 2. Monitoring terminal protection mechanism; 21. Mounting shell; 22. Front through slot; 23. Side dovetail slot; 24. Top cover; 25. Dovetail slide bar; 26. Fixing lug; 27. Fixing screw; 28. Mesh placement plate; 29. ​​Sealing strip; 210. Cable routing rectangular through slot; 211. Lower sealing rubber seat; 3. Monitoring terminal fastening mechanism; 31. Side longitudinal slot; 32. Crossbar; 33. Mounting screw; 34. Fastening bend plate; 35. Stop block; 36. Fixing bracket; 37. Screw hole block; 38. Stud; 39. Knob; 4. Air intake and heat dissipation mechanism; 41. Air intake rectangular slot; 42. Dust filter; 43. Fan bracket; 44. Intake fan; 45. Heat dissipation fins; 5. Excess cable management and storage mechanism; 51. Horizontal... 52 Beam, 53 Sliding sleeve, 54 Fastening screw, 55 Fixing seat, 56 Support column, 57 Anti-detachment ring, 58 Winding spool, 59 Limiting sleeve, 50 Wire clamp, 6 Support foot, 7 Exhaust cooling mechanism, 71 Exhaust rectangular slot, 72 Movable shaft, 73 Flip plate, 74 Exhaust fan, 75 Clip, 76 Slot, 8 Cable outer end fastening mechanism, 81 Vertical sliding column, 82 Bolt, 83 Limiting slider, 84 Fastening back cover, 85 Fastening wire groove, 86 Upper sealing rubber seat, 87 Round frame, 88 Ventilation mesh, 9 Cable inner end limiting mechanism, 91 Wire plate, 92 Wire hole, 93 Rubber plug, 94 Cross through hole, 95 Wire passing vertical groove, 96 Clip groove, 97 Rubber stop strip, 98 Rubber clip strip, 99 Wire passing seam. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Please see Figures 1 to 8 This embodiment provides a technical solution: an online monitoring device for a substation secondary system, including a secondary system online monitoring terminal 1, a monitoring terminal protection mechanism 2, a monitoring terminal fastening mechanism 3, a residual wire organization and storage mechanism 5, and a cable inner end limiting mechanism 9;

[0045] The monitoring terminal protection mechanism 2 includes a mounting shell 21, a front through groove 22, a side dovetail groove 23, a top cover 24, a dovetail slide 25, a mesh placement plate 28, a wire-threading rectangular through groove 210, and a lower sealing seat 211. The top of the mounting shell 21 has an opening, and the front through groove 22 is a stepped groove with a sealing strip 29 inside. A mesh placement plate 28 is located at the bottom of the front through groove 22 inside the mounting shell 21. The secondary system online monitoring terminal 1 is placed on the mesh placement plate 28. The front through groove 22 is connected to the secondary system online monitoring... The front end of the terminal 1 is fitted with a sealing strip 29 that corresponds to the front edge of the secondary system online monitoring terminal 1, so that the gap between the front through groove 22 and the secondary system online monitoring terminal 1 is sealed. The top two sides of the mounting shell 21 are respectively provided with side dovetail grooves 23, and the top cover 24 is respectively provided with dovetail slide strips 25 that are longitudinally slidably connected to the side dovetail grooves 23. The rear side of the mounting shell 21 is provided with horizontally equidistant rectangular through grooves 210 for wire threading. The bottom of the rectangular through groove 210 is fitted with a lower sealing rubber seat 211, and the top of the lower sealing rubber seat 211 is provided with an arc-shaped wire clamping groove.

[0046] The monitoring terminal protection mechanism 2 also includes a fixing lug 26 and a fixing screw 27. The fixing lug 26 is provided on the front side of the top cover 24, and the fixing screw 27 is threadedly connected to the fixing lug 26. The fixing screw 27 is set to correspond to the screw hole on the front side of the top of the mounting shell 21. After the top cover 24 completely covers the opening, the position of the top cover 24 is fixed by the fixing screw 27 and the fixing lug 26, which can stably seal the opening.

[0047] The monitoring terminal fastening mechanism 3 is installed inside the mounting shell 21, and the monitoring terminal fastening mechanism 3 is engaged with the top rear side of the secondary system online monitoring terminal 1.

[0048] The monitoring terminal fastening mechanism 3 includes a side longitudinal groove 31, a crossbar 32, a mounting screw 33, a fastening bend 34, a stop block 35, a fixing bracket 36, a screw hole block 37, a stud 38, and a knob 39.

[0049] Side longitudinal grooves 31 are respectively opened on the left and right sides of the mounting shell 21. The two ends of the crossbar 32 are respectively slidably connected to the two side longitudinal grooves 31. The two ends of the crossbar 32 are respectively fixedly connected to the stop blocks 35. The stop blocks 35 are located on the outside of the mounting shell 21, and the two stop blocks 35 block the side longitudinal grooves 31 to maintain the sealing of the interior of the mounting shell 21. A fastening bend plate 34 is fixedly connected to the crossbar 32 by mounting screws 33. The fastening bend plate 34 is engaged with the top rear side of the secondary system online monitoring terminal 1. A screw hole block 37 is fixedly connected to the bottom of one of the stop blocks 35. The screw hole block 37 is threadedly connected to the longitudinal stud 38. The front and rear ends of the stud 38 are respectively rotatably connected to the fixing bracket 36, which is fixed to the outside of the mounting shell 21. The front end of the stud 38 is fixedly connected to the knob 39. The stud 38 can be rotated by the knob 39. The stud 38 rotates relative to the fixing bracket 36. Through the thread action with the screw hole block 37, the crossbar 32 and the stop block 35 move back and forth along the side longitudinal groove 31. When the crossbar 32 and the stop block 35 move backward, the secondary system online monitoring terminal 1 can be taken out or put in. Then, the crossbar 32 and the stop block 35 are moved forward by the knob 39. The secondary system online monitoring terminal 1 is clamped and fixed forward by the fastening bending plate 34.

[0050] The inner end limiting mechanism 9 of the cable is set inside the mounting shell 21, and the inner end limiting mechanism 9 of the cable is located on the rear side of the mesh placement plate 28.

[0051] The cable inner end limiting mechanism 9 includes a cable plate 91, cable holes 92, and cable passage grooves 95. A vertical cable plate 91 is fixedly connected inside the mounting housing 21, located behind the mesh placement plate 28. The top of the cable plate 91 is horizontally lower than the top surface of the mounting housing 21. Cable passage grooves 95 are evenly spaced horizontally on the top of the cable plate 91, and cable holes 92 are evenly spaced horizontally in the middle of the cable plate 91. The cable holes 92 and cable passage grooves 95 are alternately distributed. The cable plate 91 separates the front and rear sides of the mounting housing 21. The front chamber of the mounting housing 21 is used to install the secondary system online monitoring terminal 1, and the rear chamber of the mounting housing 21 is used to store and organize cables. The cable holes 92 and cable passage grooves 95 allow different types of cables to pass through.

[0052] The cable inner end limiting mechanism 9 also includes a rubber plug 93 and a cross-shaped through hole 94. The rubber plug 93 is installed inside the wire hole 92. The front and rear ends of the rubber plug 93 are provided with circular grooves, and the middle of the rubber plug 93 is provided with a cross-shaped through hole 94. The rubber plug 93 is used to seal the wire hole 92, and the cross-shaped through hole 94 allows the cable to pass through the rubber plug 93. The cross-shaped through hole 94 can reduce the gap between the cable and the rubber plug 93, so that the cable can be stably locked in the cross-shaped through hole 94.

[0053] The cable inner end limiting mechanism 9 also includes a snap-fit ​​groove 96, a rubber stop strip 97, a rubber clip strip 98, and a cable passage seam 99. Snap-fit ​​grooves 96 are respectively provided on both sides of the cable passage vertical groove 95. A rubber stop strip 97 is provided inside the cable passage vertical groove 95. Rubber clip strips 98 are respectively provided on both sides of the rubber stop strip 97 to snap into the snap-fit ​​groove 96. Cable passage seams 99 are vertically spaced at equal intervals on the rubber stop strip 97. The snap-fit ​​groove 96 is used to snap into the rubber clip strips 98 on the side of the rubber stop strip 97, facilitating the stable placement of the rubber stop strip 97 into the cable passage vertical groove 95. The cable passes through the cable passage seam 99 on the rubber stop strip 97, which is more suitable for passing flat cables.

[0054] The excess wire organizing and storage mechanism 5 is installed inside the rear side of the mounting shell 21.

[0055] The excess wire organizing and storage mechanism 5 includes a horizontal adjustment component, a fixed base 54, a support column 55, an anti-detachment ring 56, a winding drum 57, a limiting sleeve 58, and a wire clamp 59. The horizontal adjustment component is located at the bottom rear side inside the mounting housing 21. Fixed bases 54 are arranged horizontally at equal intervals on the horizontal adjustment component. The bottom of the support column 55 is fixedly connected to the fixed base 54. The top of the support column 55 extends into the winding drum 57 and is threadedly connected to the anti-detachment ring 56. The upper and lower ends of the winding drum 57 are respectively fixedly sleeved with the limiting sleeve 58. A wire clamp 59 is provided on the opposite side of the two limiting sleeves 58.

[0056] The lateral adjustment assembly includes a crossbeam 51, a sliding sleeve 52, and a fastening screw 53. The crossbeam 51 is inserted and fixedly connected to the bottom rear side of the mounting housing 21. Sliding sleeves 52 are equidistantly slidably fitted onto the crossbeam 51. A fastening screw 53 is threaded into the screw hole at the bottom of each sliding sleeve 52. The fastening screw 53 abuts against the bottom of the crossbeam 51. The bottom of the fixing seat 54 is fixedly connected to the top of each sliding sleeve 52. By sliding the sliding sleeve 52 along the crossbeam 51, the lateral position of the fixing seat 54, the support column 55, and the winding drum 57 can be adjusted, which is suitable for adjusting the spacing between the winding drums 57 and using different cables. Then, the position of the sliding sleeve 52 on the crossbeam 51 is fixed by the fastening screw 53.

[0057] The horizontal adjustment component can adjust the position of the fixed base 54. The winding drum 57 can move up and down along the support column 55. When the cable is too long, the winding drum 57 is lifted up along the support column 55 and extends out of the mounting shell 21. The anti-detachment ring 56 prevents the winding drum 57 from being lifted too high and detaching from the support column 55. The excessively long cable is wound onto the winding drum 57, and then the winding drum 57 is pressed down to retract into the mounting shell 21. The winding drum 57 is provided with friction thread texture, which is conducive to the stable winding of the cable onto the winding drum 57. The limiting sleeve 58 winds the cable wound at the end of the winding drum 57. The wire clamp 59 can lock the end of the wound cable to prevent the cable from loosening on the winding drum 57 after releasing the hand.

[0058] In use, the secondary system online monitoring terminal 1 is placed inside the mounting housing 21, which protects it. The top cover 24 slides along the side dovetail groove 23 via the dovetail slide 25, allowing the opening at the top of the mounting housing 21 to accommodate the secondary system online monitoring terminal 1 or to connect wires at its rear end. The mesh placement plate 28 facilitates airflow from bottom to top to the secondary system online monitoring terminal 1, carrying away the heat generated by it. The rectangular cable pass-through groove 210 allows the cable connected to the rear end of the secondary system online monitoring terminal 1 to pass through. The lower sealing seat 211 seals the gap between the cable and the bottom of the rectangular cable pass-through groove 210, preventing debris from entering. Entering the mounting housing 21 from here, the monitoring terminal fastening mechanism 3 presses the secondary system online monitoring terminal 1 forward within the mounting housing 21, ensuring that the control panel on the front side of the secondary system online monitoring terminal 1 is securely positioned at the front through slot 22. The control panel of the secondary system online monitoring terminal 1 can be operated through the front through slot 22, preventing the secondary system online monitoring terminal 1 from moving within the mounting housing 21. The cable inner end limiting mechanism 9 is used to clamp and limit the end of the cable close to the secondary system online monitoring terminal 1. The excess cable organizing and storage mechanism 5 is used to organize and store the redundant part of the cable to the rear end inside the mounting housing 21, making the wires easy to manage after wiring. This facilitates quick and easy rewiring of the secondary system online monitoring terminal, improving wiring efficiency.

[0059] Please see Figure 2 , 3 In addition to 7, it also includes an air intake and heat dissipation mechanism 4. The air intake and heat dissipation mechanism 4 is embedded in the bottom of the mounting shell 21 at the position corresponding to the mesh placement plate 28. The air intake and heat dissipation mechanism 4 blows air into the mounting shell 21, sending the external air into the mounting shell 21 to remove the heat generated by the secondary system online monitoring terminal 1.

[0060] The air intake and heat dissipation mechanism 4 includes an air intake rectangular slot 41, a dust filter 42, a fan bracket 43, an intake fan 44, and heat dissipation fins 45. The bottom of the mounting shell 21 is provided with an air intake rectangular slot 41 corresponding to the position of the mesh placement plate 28. The dust filter 42 is provided in the air intake rectangular slot 41. The intake fan 44 is installed in the mounting shell 21 below the mesh placement plate 28 via the fan bracket 43. The intake fan 44 faces the direction of air blowing. Heat dissipation fins 45 are provided at equal distances on both sides of the secondary system online monitoring terminal 1. The intake fan 44 blows air into the mounting shell 21. The dust filter 42 filters the dust from the air passing through the air intake rectangular slot 41 to prevent dust in the air from contaminating the secondary system online monitoring terminal 1. The heat dissipation fins 45 work together to promote the dissipation of heat from the secondary system online monitoring terminal 1.

[0061] The four corners of the bottom of the mounting shell 21 are provided with support feet 6. The support feet 6 raise the mounting shell 21, thereby increasing the gap between the bottom of the mounting shell 21 and the ground, which facilitates ventilation from the bottom of the mounting shell 21 into the air intake rectangular slot 41 in the air intake heat dissipation mechanism 4.

[0062] It also includes a ventilation and heat dissipation mechanism 7, which is installed at the bottom rear side of the mounting housing 21 and exhausts air to the outside of the rear side of the mounting housing 21. The ventilation and heat dissipation mechanism 7 facilitates the discharge of hot air from the mounting housing 21.

[0063] The exhaust and heat dissipation mechanism 7 includes an exhaust rectangular slot 71, a movable shaft 72, a flap 73, an exhaust fan 74, a locking block 75, and a locking groove 76. The exhaust rectangular slot 71 is provided at the bottom rear side of the mounting housing 21. The top of the exhaust rectangular slot 71 is movably connected to the top of the flap 73 through the movable shaft 72. An exhaust fan 74 is provided in the round groove on the flap 73. The exhaust fan 74 blows air backward, which can exhaust the air at the rear side of the mounting housing 21 to the outside, which is conducive to dissipating the heat generated by the secondary system online monitoring terminal 1 in the mounting housing 21. The bottom of the flap 73 is provided with a locking block 75, and the bottom of the exhaust rectangular slot 71 is provided with a locking groove 76 that engages with the locking block 75. The flap 73 is locked and fixed by the locking block 75 and the locking groove 76. The flap 73 can be opened when the horizontal adjustment component needs to be adjusted.

[0064] Please see Figures 1 to 6 It also includes a cable outer end fastening mechanism 8, which includes a sliding limit component, a fastening back cover 84, a fastening wire groove 85, an upper sealing seat 86, and a ventilation component. The fastening back cover 84 is vertically slidably installed on the rear side of the mounting shell 21 through the sliding limit component. The fastening back cover 84 has a fastening wire groove 85 corresponding to the wire threading rectangular through groove 210. The upper sealing seat 86 is fixed at the top of the fastening wire groove 85. The bottom of the upper sealing seat 86 has an arc-shaped wire clamping groove. The bottom of the fastening back cover 84 is provided with a ventilation component corresponding to the exhaust heat dissipation mechanism 7.

[0065] The ventilation assembly includes a circular frame 87 and a ventilation mesh 88. The bottom of the fastening back cover 84 is inlaid with the circular frame 87, and the ventilation mesh 88 is provided inside the circular frame 87. The hot air blown out from the exhaust fan 74 is discharged from the mounting shell 21 through the ventilation mesh 88.

[0066] The sliding limit assembly includes a vertical sliding post 81, a bolt 82, and a limit slider 83. Rectangular vertical grooves are respectively formed at the left and right ends of the rear side of the mounting shell 21. A vertical sliding post 81 is fixedly connected within each rectangular vertical groove. A limit slider 83 is vertically slidably connected to each vertical sliding post 81. The two limit sliders 83 are respectively fixedly connected to the middle of both sides of the fastening back cover 84 by bolts 82. The vertical sliding post 81 and the limit slider 83 limit the fastening back cover 84, thus ensuring that the fastening back cover 84... 4. It can only move steadily vertically up and down. After the back cover 84 is moved down normally and safely, the top cover 24 is slid backward so that the bottom of the rear end of the top cover 24 is pressed against the top of the back cover 84. This can stably fix the back cover 84 and prevent the back cover 84 from moving upward again due to the elasticity of the upper sealing seat 86 and the lower sealing seat 211. In addition, a wedge-shaped surface is provided on the front side of the top of the back cover 84, which allows the top cover 24 to move backward against the wedge-shaped surface and press the back cover 84 downward.

[0067] The sliding limit assembly allows the fastening back cover 84 to move smoothly up and down along the rear side of the mounting shell 21. When the fastening back cover 84 moves upward along the sliding limit assembly, the cable can pass through the fastening cable groove 85 and the cable-passing rectangular through groove 210. Then, the fastening back cover 84 moves downward, and the arc-shaped cable-holding groove 2 at the bottom of the upper sealing seat 86 engages with the upper side of the cable, and the arc-shaped cable-holding groove 1 on the upper side of the lower sealing seat 211 engages with the bottom of the cable. The upper and lower sides of the cable are secured by the upper sealing seat 86 and the lower sealing seat 211, and the gap between the cable and the cable-passing rectangular through groove 210 is sealed. After the fastening back cover 84 moves to the lowest side, the ventilation assembly corresponds to the exhaust heat dissipation mechanism 7, without affecting the exhaust heat dissipation mechanism 7.

[0068] Please see Figure 9 The logical architecture of the substation secondary system online monitoring device is as follows: the substation secondary system online monitoring information is collected and processed in a hierarchical manner. The collection unit collects station control layer network information, process layer network information and process layer equipment information, and connects to the secondary system online monitoring terminal 1 through the network. The secondary system online monitoring terminal 1 communicates with the application server / integrated application host through the DL / T 860 protocol, and uploads the analysis results of the secondary system online monitoring terminal 1 to the central control station through the II area communication gateway.

[0069] The main station includes a centralized control station;

[0070] The substation control layer is equipped with a Zone II communication gateway, a secondary system online monitoring terminal 1, an application server / integrated application host, and a data acquisition unit.

[0071] The process layer within the substation is equipped with a data acquisition unit;

[0072] The data acquisition unit performs information collection, module maintenance, and monitoring and analysis for both the station control layer and the process layer.

[0073] The output terminals of the acquisition units in the process layer and the acquisition units in the station control layer are electrically connected to the input terminals of the secondary system online monitoring terminal 1, respectively. The secondary system online monitoring terminal 1 is bidirectionally electrically connected to the II zone communication gateway and the application server / integrated application host. The II zone communication gateway is bidirectionally electrically connected to the central control station through the data network.

[0074] Please see Figure 10 The secondary system online monitoring terminal 1 communicates bidirectionally with the secondary equipment in Security Zone I through the firewall between Security Zone I and Security Zone II, collecting information data from the monitoring host, communication gateway, relay protection and stabilization device, measurement and control device, and synchronization phasor measurement module in Security Zone I. The acquisition unit is the secondary system online monitoring acquisition unit, which directly monitors the MMS and GOOSE communication messages of the station control layer network in real time from the mirror port of the switch in the station control layer in Security Zone I using a one-way communication method.

[0075] The secondary system online monitoring and acquisition unit directly collects process layer GOOSE and SV network communication message data from the switches of each voltage level process layer, and monitors the operation information, alarm information and monitoring information of intelligent terminals and merging units in process layer equipment in real time;

[0076] The metering system, fault location module, power quality online monitoring module, and network security device mainly collect hard contact information through the measurement and control device and forward it to the secondary system online monitoring terminal 1.

[0077] The Safety Zone I includes an MMS network, a GOOSE / SV network, two secondary system online monitoring and acquisition units, a relay protection and stabilization device, a clock, a monitoring host, a Zone I communication gateway, a synchronization phasor measurement module, a measurement and control device, an integrated power supply, a switch, a merging unit, and a smart terminal.

[0078] The relay protection and stabilization device, clock, monitoring host, Zone I communication gateway, synchronization phasor measurement module, measurement and control device, integrated power supply, and switch are all bidirectionally electrically connected to the MMS network. The input of one secondary system online monitoring and acquisition unit is electrically connected to the output of the MMS network, and the input of another secondary system online monitoring and acquisition unit is electrically connected to the output of the GOOSE / SV network. The GOOSE / SV network is also electrically connected to the merging unit and the smart terminal.

[0079] The Security Zone II is equipped with a centralized control station, Zone II communication gateway, MMS network, application server / integrated application host, secondary system online monitoring terminal 1, fault recording device, metering system, fault location module, power quality online monitoring module and network security device;

[0080] The outputs of the two secondary system online monitoring and acquisition units are electrically connected to the input of the secondary system online monitoring terminal 1. The outputs of the fault recording device, metering system, fault location module, power quality online monitoring module and network security device are electrically connected to the input of the measurement and control device. The fault recording device is electrically connected to the MMS network in safety zone II. The fault recording device is bidirectionally electrically connected to the secondary system online monitoring terminal 1. The application server / integrated application host and the zone II communication gateway are bidirectionally electrically connected to the MMS network in safety zone II. The zone II communication gateway is bidirectionally electrically connected to the central control station.

[0081] The MMS network in Security Zone I is connected to the MMS network in Security Zone II through a firewall. The output of the firewall is electrically connected to the MMS network in Security Zone I and the input of the secondary system online monitoring terminal 1.

[0082] It is worth noting that this invention is applicable to the design of online monitoring of secondary systems in 35kV-750kV substations;

[0083] The secondary system online monitoring and acquisition unit in this invention is a device with the functions of secondary system data acquisition, recording and uploading, realizing online monitoring of network information at the station control layer and process layer, and communicating with the secondary system online monitoring terminal 1 through the internal network;

[0084] The secondary system online monitoring terminal 1 is a device with functions of secondary system data acquisition, aggregation, alarm, analysis and uploading. It realizes online monitoring and status awareness of substation secondary equipment, circuits and network messages, and communicates with the secondary system online monitoring acquisition unit through the internal network.

[0085] Online monitoring of substation secondary systems should adopt advanced digital, networked, information-sharing, and security protection technologies to promote the digital transformation of substations.

[0086] Online monitoring of substation secondary systems enables online monitoring, status perception, fault diagnosis, and comprehensive analysis of all secondary equipment, circuits, and network messages in the substation, supporting intelligent operation and maintenance.

[0087] The network architecture of the online monitoring device for the substation secondary system is as follows:

[0088] The secondary system online monitoring terminal 1 is connected to the dual network of the station control layer in Safety Zone II. The acquisition unit is connected to the dual network of the station control layer in Safety Zone I to acquire station control layer network information; the acquisition unit is also connected to the dual network of the process layer to acquire process layer network information and process layer equipment information. An internal communication network is established between the secondary system online monitoring terminal 1 and the acquisition unit, and the internal communication network is configured as a single network.

[0089] The basic functions of online monitoring of substation secondary systems should include secondary equipment status monitoring, online monitoring of secondary circuits, and network message analysis. These basic functions are implemented by the online monitoring terminal 1 of the secondary system.

[0090] Secondary equipment status monitoring:

[0091] It has online monitoring capabilities for the real-time operating status of secondary equipment, including:

[0092] a) Displays an overview of the status of secondary equipment in the substation, including panel diagrams and ledger information. It also displays the real-time status of analog quantities and status quantities of secondary equipment, and monitors the operating status, operating settings, and setting zone numbers of secondary equipment devices.

[0093] b) Possesses the operating parameters and general documentation for the secondary equipment summoning device;

[0094] c) It has the capability to receive and analyze fault recording files from secondary equipment.

[0095] Secondary circuit online monitoring is capable of monitoring the physical circuit and logical link connection topology and real-time status between devices within the substation, including:

[0096] a) The process layer network topology and the real-time status of the loops;

[0097] b) Visualization of the physical and logical connections of the physical circuits and the logical circuits, the relationship between the virtual terminals and the soft pressure plate, the real-time status of the terminals and the soft pressure plate, and the display of operating information such as the IED port number, link status, optical intensity, and communication status of the optical fiber.

[0098] c) It has the ability to analyze equipment configuration changes and show the scope of impact of SCD changes.

[0099] Network packet analysis, capable of collecting and analyzing network packets within the station, provides monitoring tools and auxiliary decision-making basis for the network operation status and fault analysis of secondary systems, including:

[0100] a) Real-time display of alarm content from secondary system message collection, analysis, and reporting;

[0101] b) Display the network protocols used by the device and differentiate the operating status of each network protocol by color;

[0102] c) Display the operating status of the acquisition unit and acquisition port, as well as detailed operating information of each network communication link, including link operating information, real-time online acquisition and parsing of messages, real-time link alarms, GOOSE status, SV dispersion, SV waveform and phase monitoring, etc.

[0103] d) Query historical abnormal message events and data acquisition unit operation records;

[0104] e) Query the list of abnormal messages and the list of continuous messages stored in the acquisition unit;

[0105] f) Display functions such as the operation information of the data acquisition unit and the online monitoring terminal of the secondary system.

[0106] Advanced online monitoring applications for substation secondary systems include protection action analysis, automatic inspection, intelligent defect diagnosis, defect anomaly early warning, link defect cross-section analysis, and monitoring of primary and secondary mismatches. These advanced application functions are deployed on the application server.

[0107] The scope of data collection for online monitoring of secondary systems should include station control layer equipment, bay layer equipment, process layer equipment, and network equipment. Specific information includes network packets and the operating status information of secondary equipment such as monitoring hosts, communication gateways, relay protection and stability devices, measurement and control devices, synchronous phasor measurement devices, clock devices, integrated power supplies, switches, intelligent terminals, merging units, network security devices, fault recording devices, metering systems, fault location devices, and online power quality monitoring devices.

[0108] The collected content includes:

[0109] Network packets, collecting network packet information from MMS, GOOSE, and SV;

[0110] The monitoring host collects information including its operating information, memory information, hard disk operating information, and process status.

[0111] The information collected by the communication gateway should meet the Q / GDW 11627 standard, specifically including: online monitoring data such as equipment ledger, communication status, operating conditions, self-test alarms, equipment resources, internal environment, and time synchronization status.

[0112] Information on relay protection and stability devices should meet the requirements of GB / T 40599 standard.

[0113] The information collected from the integrated power supply device should meet the technical specifications for intelligent AC / DC power supply systems in substations, specifically including: telemetry and remote signaling over-limit alarm information of the integrated power supply circuit, communication interruption alarm information of the acquisition terminal, battery ambient temperature, AC incoming power supply faults, etc.

[0114] The collected merged unit information should meet the GB / T 40599 standard.

[0115] The data acquisition unit should have a storage capacity of at least 2TB.

[0116] The continuous recording time of the acquisition unit should meet the following requirements: SV continuous recording storage for more than 24 hours, GOOSE message and MMS message continuous recording storage for more than 14 days, and abnormal message record storage for more than 1,000 records.

[0117] All network interfaces of the device should use independent data interface controllers, and data leakage between network interfaces should not occur under any circumstances. Upgrades to the device's functional versions should not involve changes to the communication protocol.

[0118] The principles of "security zoning, dedicated networks, horizontal isolation, and vertical authentication" should be followed. Access and interaction isolation between different security zones within a substation should be achieved through network security isolation devices or firewalls. Vertical authentication and communication encryption should be implemented at the substation's exit points. Data transmitted vertically should be encrypted to ensure the confidentiality and integrity of data transmission. When using wireless communication, a secure access zone should be established.

[0119] Please see Figure 11 Typical solutions for 330kV and above substations:

[0120] This typical solution is configured using a 500kV substation as an example. The data acquisition units are configured according to network, voltage level, and secondary equipment room. The data acquisition units and monitoring terminals are networked separately.

[0121] The entire station is equipped with one station control layer data acquisition unit, which is located in the common secondary equipment room;

[0122] The process layer acquisition unit is configured in two sets, with 4 acquisition units configured for 500kV, of which 2 units are arranged in each 500kV secondary equipment room;

[0123] Four acquisition units are configured for 220kV, with two units arranged in each 220kV secondary equipment room.

[0124] The entire station is equipped with one online monitoring terminal for the secondary system.

[0125] The entire site is equipped with one network switch, which is located in the common secondary equipment room.

[0126] The entire site is configured with one application server.

[0127] Please see Figure 12 Typical scheme for 220kV substation:

[0128] This typical solution uses a 220kV substation as an example for configuration.

[0129] The data acquisition units are configured according to network, voltage level, and scale, and the data acquisition units and monitoring terminals are networked separately.

[0130] The entire station is equipped with one station control layer data acquisition unit;

[0131] The process layer acquisition unit is configured in two sets: two acquisition units for 220kV and two acquisition units for 110kV.

[0132] The entire station is equipped with one online monitoring terminal for the secondary system;

[0133] The entire site is configured with one network switch.

[0134] The entire site is configured with one application server.

[0135] Please see Figure 13 Typical solutions for 110kV and below substations:

[0136] This typical solution uses a 110kV substation as an example for configuration.

[0137] The data acquisition units are configured uniformly based on the network and the overall site scale.

[0138] The entire station is equipped with one station control layer acquisition unit; the process layer acquisition unit is configured as a single set, with one process layer acquisition unit configured for the entire station.

[0139] The entire station is equipped with one secondary system online monitoring terminal.

[0140] The data acquisition unit is directly connected to the online monitoring terminal of the secondary system, and no switch is configured for internal networking.

[0141] The entire site is configured with one application server.

[0142] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0143] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online monitoring device for a substation secondary system, characterized in that, include: The monitoring terminal protection mechanism (2) includes a mounting shell (21). The top of the mounting shell (21) has an opening, and a front through groove (22) is provided on the front side of the mounting shell (21). The front through groove (22) is a stepped groove. A mesh placement plate (28) is provided on the front side of the mounting shell (21) at the bottom of the front through groove (22). A secondary system online monitoring terminal (1) is placed on the mesh placement plate (28). The front through groove (22) and the secondary system online monitoring terminal are connected. The front end of the end (1) is fitted with a side dovetail groove (23) on the top two sides of the mounting shell (21). The top cover (24) is provided with dovetail slide strips (25) that are longitudinally slidably connected to the side dovetail grooves (23) on both sides. The rear side of the mounting shell (21) is provided with a horizontal rectangular through groove (210) at equal intervals. The bottom of the through groove (210) is fitted with a lower sealing glue seat (211). The top of the lower sealing glue seat (211) is provided with an arc-shaped wire clamping groove. It also includes an air intake heat dissipation mechanism (4), in which the air intake heat dissipation mechanism (4) is embedded at the bottom of the mounting shell (21) at the position corresponding to the mesh placement plate (28), and the air intake heat dissipation mechanism (4) blows air into the mounting shell (21); It also includes an exhaust heat dissipation mechanism (7), which is installed at the bottom rear side of the mounting housing (21) and exhausts air to the outside of the rear side of the mounting housing (21); It also includes a cable outer end fastening mechanism (8), which includes a sliding limit component, a fastening back cover (84), a fastening wire groove (85), an upper sealing seat (86), and a ventilation component. The fastening back cover (84) is vertically slidably installed on the rear side of the mounting shell (21) through the sliding limit component. The fastening back cover (84) has a fastening wire groove (85) corresponding to the wire threading rectangular through groove (210). The upper sealing seat (86) is fixed at the top of the fastening wire groove (85). The bottom of the upper sealing seat (86) has an arc-shaped wire clamping groove. The bottom of the fastening back cover (84) is provided with a ventilation component corresponding to the exhaust heat dissipation mechanism (7).

2. The online monitoring device for substation secondary systems according to claim 1, characterized in that: It also includes a cable inner end limiting mechanism (9), which is set inside the mounting shell (21) and located on the rear side of the mesh placement plate (28). The cable inner end limiting mechanism (9) includes a wire plate (91), wire holes (92) and wire passage vertical grooves (95). A vertical wire plate (91) is fixedly connected inside the mounting shell (21) at the position on the rear side of the mesh placement plate (28). The top of the wire plate (91) is horizontally lower than the top surface of the mounting shell (21). Wire passage vertical grooves (95) are opened horizontally at equal intervals on the top of the wire plate (91). Wire holes (92) are opened horizontally at equal intervals in the middle of the wire plate (91). The wire holes (92) and wire passage vertical grooves (95) are alternately distributed.

3. The online monitoring device for substation secondary systems according to claim 2, characterized in that: The cable inner end limiting mechanism (9) also includes a rubber plug (93) and a cross through hole (94). The rubber plug (93) is provided in the wire hole (92). The front and rear ends of the rubber plug (93) are provided with round grooves, and the middle part of the rubber plug (93) is provided with a cross through hole (94).

4. The online monitoring device for substation secondary systems according to claim 2, characterized in that: The cable inner end limiting mechanism (9) also includes a snap-fit ​​groove (96), a rubber baffle (97), a rubber clip (98), and a wire passage seam (99). Snap-fit ​​grooves (96) are respectively opened on both sides of the wire passage vertical groove (95). A rubber baffle (97) is provided inside the wire passage vertical groove (95). A rubber clip (98) is respectively provided on both sides of the rubber baffle (97) to snap into the snap-fit ​​groove (96). Wire passage seams (99) are vertically and evenly spaced on the rubber baffle (97).

5. The online monitoring device for substation secondary systems according to claim 1, characterized in that: It also includes a wire tidying and storage mechanism (5), which is installed inside the rear side of the mounting shell (21). The wire tidying and storage mechanism (5) includes a horizontal adjustment component, a fixed seat (54), a support column (55), an anti-detachment ring (56), a winding drum (57), a limiting sleeve (58), and a wire clamp (59). The horizontal adjustment component is provided at the bottom of the rear side inside the mounting shell (21). The fixed seat (54) is provided at equal horizontal distances on the horizontal adjustment component. The bottom of the support column (55) is fixedly connected to the fixed seat (54). The top of the support column (55) extends into the winding drum (57) and is threadedly connected to the anti-detachment ring (56). The upper and lower ends of the winding drum (57) are respectively fixedly sleeved with the limiting sleeve (58). A wire clamp (59) is provided on the opposite side of the two limiting sleeves (58).

6. The online monitoring device for substation secondary systems according to claim 1, characterized in that: It also includes a monitoring terminal fastening mechanism (3), which is installed inside the mounting shell (21) and is engaged with the top rear side of the secondary system online monitoring terminal (1).

7. The online monitoring device for substation secondary systems according to claim 1, characterized in that: The logical architecture of the substation secondary system online monitoring device is as follows: the substation secondary system online monitoring information is collected and processed in a unified manner in layers. The collection unit collects the station control layer network information, process layer network information and process layer equipment information, and accesses the secondary system online monitoring terminal (1) through the network. The secondary system online monitoring terminal (1) communicates with the application server / integrated application host through the DL / T 860 protocol, and uploads the analysis results of the secondary system online monitoring terminal (1) to the central control station through the II zone communication gateway.

8. The online monitoring device for substation secondary systems according to claim 7, characterized in that: The secondary system online monitoring terminal (1) communicates bidirectionally with the secondary equipment in the security zone through the firewall between security zone I and security zone II, and collects information data from the monitoring host, communication gateway, relay protection and stability device, measurement and control device, and synchronous phasor measurement module in the security zone I. The acquisition unit is a secondary system online monitoring acquisition unit. The secondary system online monitoring acquisition unit directly monitors the MMS and GOOSE communication messages of the station control layer network in real time through the mirror port of the switch in the station control layer of Security Zone I using a one-way communication method. The secondary system online monitoring and acquisition unit directly collects process layer GOOSE and SV network communication message data from the switches of each voltage level process layer, and monitors the operation information, alarm information and monitoring information of the intelligent terminal and merging unit in the process layer equipment in real time; the metering system, fault location module, power quality online monitoring module and network security device mainly collect hard contact information through the measurement and control device and forward it to the secondary system online monitoring terminal (1).

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