A high voltage direct current energy dissipation device

Abstract

This invention provides a high-voltage direct current energy dissipation device, comprising a surge arrester body, a trigger switch assembly, a resistor tower assembly, a reactor assembly, a bypass switch assembly, and a base assembly. The surge arrester body, trigger switch assembly, and resistor tower assembly are all vertical structures, and the surge arrester body and resistor tower assembly are arranged in layers. The surge arrester body is located on top of the base assembly, and the resistor tower assembly is located on top of the trigger switch assembly. The surge arrester body is connected to the trigger switch assembly and resistor tower assembly in layers. The reactor assembly and bypass switch assembly are both connected to the trigger switch assembly. This invention is easy to manufacture, low in cost, and simple to control. The overall layered and functional area layout is relatively compact, facilitating fiber optic cable installation, reducing the footprint, improving overall seismic resistance, simplifying inspection and maintenance, and ensuring high operational reliability.

Description

Technical Field

[0001] This invention relates to the field of high voltage direct current (HVDC) transmission technology, and specifically to a HVDC energy dissipation device. Background Technology

[0002] Given the potential overvoltage conditions that may occur in the voltage source converter valve due to faults in the hybrid DC system, the system design incorporates an energy dissipation device at the DC bus to promptly detect the overvoltage status of the submodule, enable rapid switching, reduce surplus power, allow the voltage source converter valve to overcome faults, protect the voltage source converter valve, and resolve the overvoltage problem of the voltage source converter valve during faults.

[0003] A DC chopper, also known as a DC-DC converter, converts direct current (DC) into a fixed or adjustable DC voltage. There are six basic types of DC choppers: Buck chopper, Boost chopper, Buck-Boost chopper, Cuk chopper, Sepic chopper, and Zeta chopper.

[0004] Currently, DC systems generally use DC-DC converters as energy dissipation devices, including high-voltage direct-connect IGBT valves and energy-consuming resistors. However, high-voltage direct-connect IGBT valves are difficult to manufacture and costly, and the control process of IGBT devices is complex. The overall manufacturing cost of DC-DC converters is high, the structure is not compact, and the footprint is large. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, such as high manufacturing cost, non-compact structure and large footprint, the present invention provides a high voltage DC energy discharge device, including a surge arrester body (10), a trigger switch assembly (20), a resistor tower assembly (30), a reactor assembly (40), a bypass switch assembly (50) and a base assembly (60).

[0006] The surge arrester body (10), the trigger switch assembly (20), and the resistor tower assembly (30) are all vertical structures, and the surge arrester body (10) and the resistor tower assembly (30) are arranged in layers. The surge arrester body (10) is located on the upper part of the base assembly (60), and the resistor tower assembly (30) is located on the upper part of the trigger switch assembly (20). The surge arrester body (10) is connected in layers to the trigger switch assembly (20) and the resistor tower assembly (30). The reactor assembly (40) and the bypass switch assembly (50) are both connected to the trigger switch assembly (20).

[0007] The trigger switch assembly (20) includes two thyristor trigger switches arranged in parallel, and the resistor tower assembly (30) includes two resistor towers arranged in parallel.

[0008] Both the thyristor trigger switch and the resistor tower adopt a vertical structure, with the resistor tower located above the thyristor trigger switch.

[0009] The thyristor trigger switch includes two post insulators (7) for thyristor trigger switches, four shielding rings (41) for thyristor trigger switches, an aluminum alloy lower plate (8), a thyristor press-fit structure (9), two static equalizing resistor assemblies (11), two damping capacitor assemblies (12), an optical fiber slot (13), four support insulators (14) for thyristor trigger switches, an aluminum alloy upper plate (15), and two control board assemblies (25).

[0010] The two thyristor-triggered switch post insulators (7) are vertically and parallelly arranged at the lower part of the aluminum alloy lower plate (8). The aluminum alloy lower plate (8) and the aluminum alloy upper plate (15) are horizontally and parallelly arranged. Two thyristor-triggered switch shielding rings (41) are located on the outside of the aluminum alloy lower plate (8), and the other two thyristor-triggered switch shielding rings (41) are located on the outside of the aluminum alloy upper plate (15). The four thyristor-triggered switch support insulators (14) are vertically and parallelly arranged between the aluminum alloy lower plate (8) and the aluminum alloy upper plate (15). The thyristor press-fit structure (9) is fixed at the upper center of the aluminum alloy lower plate (8), of which two are... The thyristor-triggered switch support insulator (14), a static voltage equalizing resistor assembly (11), a damping capacitor assembly (12), and a control board assembly (25) are evenly arranged on one side of the thyristor press-fit structure (9), and the remaining two thyristor-triggered switch support insulators (14), another static voltage equalizing resistor assembly (11), another damping capacitor assembly (12), and another control board assembly (25) are evenly arranged on the other side of the thyristor press-fit structure (9); the fiber optic groove (13) is located between the two thyristor-triggered switch support insulators (7), and one end of the fiber optic groove (13) is connected to the aluminum alloy lower plate (8).

[0011] The thyristor press-fit structure (9) includes multiple thyristor devices (16), multiple heat sinks (17), an inlet busbar (39), an outlet busbar (33), two press-fit end plates (36), and four insulating tie rods (18).

[0012] The two press-fit end plates (36) are arranged in parallel, and the four insulating tie rods (18) are arranged in parallel. The two press-fit end plates (36) are fixed by the four insulating tie rods (18). The thyristor device (16) and the heat sink (17) are arranged in sequence at intervals within the space formed by the two press-fit end plates (36) and the four insulating tie rods (18). The incoming busbar (39) is fixed between one of the press-fit end plates (36) and the first heat sink (17). The outgoing busbar (33) is fixed between the other press-fit end plate (36) and the last heat sink (17).

[0013] The heat sink (17) is provided with a damping resistor (19) and a power extraction resistor (26).

[0014] The resistor tower comprises a multi-layer resistor structure, which is arranged vertically in sequence.

[0015] Each layer of the resistor structure includes two interlayer shielding rings (6) for resistor towers, four interlayer insulators (21), two aluminum alloy plates (22), an insulating connecting plate (23), and a voltage equalizing resistor assembly (24);

[0016] The four interlayer insulators (21) are arranged vertically and in parallel. One aluminum alloy plate (22) is located on the upper part of two of the interlayer insulators (21), and the other aluminum alloy plate (22) is located on the upper part of the remaining two interlayer insulators (21). The two aluminum alloy plates (22) are connected by an insulating connecting plate (23). The voltage equalizing resistor assembly (24) is located on the upper part of the insulating connecting plate (23) and is connected to the two aluminum alloy plates (22). The two resistor towers are respectively set on the outside of the two aluminum alloy plates (22) by interlayer shielding rings (6).

[0017] The surge arrester body (10) includes a first fixed part (5), a second fixed part (37), a controlled part (4), and a current-carrying busbar (31);

[0018] The busbar (31) is located on the upper part of the first fixed part (5), and the first fixed part (5), the second fixed part (37) and the controlled part (4) are arranged in order from top to bottom.

[0019] A surge arrester body shielding ring (32) is provided at the top of the first fixing part (5), between the first fixing part (5) and the second fixing part (37), and between the second fixing part (37) and the controlled part (4).

[0020] The reactor assembly (40) includes an insulating support (34), two reactor post insulators (38) and two reactors (35);

[0021] The two reactors (35) are fixed to the upper part of the insulating support (34), and the insulating support (34) is fixed to the upper part of the two reactor post insulators (38). The two reactors (35) are connected by a busbar.

[0022] The base assembly (60) includes an insulator assembly, multiple crossarm insulators (2), multiple steel platforms (27), and multiple high-voltage insulators (29);

[0023] The multiple steel platforms (27) are located on the upper part of the insulator assembly and on the same horizontal plane. Adjacent steel platforms (27) are connected by crossarm insulators (2). All high-voltage insulators (29) are evenly arranged on the upper part of the steel platforms (27).

[0024] The insulator assembly includes multiple single-row insulators (1) and multiple inclined insulators (3);

[0025] All single-row insulators (1) are arranged vertically and in parallel, and adjacent single-row insulators (1) are connected by inclined insulators (3).

[0026] The surge arrester body (10) and the trigger switch assembly (20) are connected by two busbars;

[0027] One end of one of the busbars is connected to the lower end of the controlled part (4), and the other end is connected to the aluminum alloy lower plate (8);

[0028] One end of the other busbar is connected to the upper end of the controlled part (4), and the other end is connected to the aluminum alloy upper plate (15).

[0029] The surge arrester body (10) and the resistor tower assembly (30) are connected by six connectors (28) and a busbar;

[0030] The six connectors (28) are arranged in three layers, with two connectors per layer. One end of the two connectors (28) in the first layer is connected to the upper end of the first fixed part (5), one end of the two connectors (28) in the second layer is connected to the lower end of the first fixed part (5), one end of the two connectors (28) in the third layer is connected to the lower end of the second fixed part (37), the other end of the two connectors (28) in the first layer and the two connectors (28) in the second layer are both connected to the corresponding aluminum alloy plate (22), and the other end of the two connectors (28) in the third layer are both connected to the aluminum alloy upper plate (15).

[0031] One end of the busbar is connected to the flow busbar (31), and the other end is connected to the aluminum alloy plate (22).

[0032] The trigger switch assembly (20) and the reactor assembly (40) are connected by two busbars;

[0033] The trigger switch assembly (20) and the bypass switch assembly (50) are connected by two cables;

[0034] One end of one busbar is connected to the incoming busbar (39) in one of the thyristor press-fit structures (9), and the other end is connected to one of the reactors (35); one end of another busbar is connected to the outgoing busbar (33) in another thyristor press-fit structure (9), and the other end is connected to another reactor (35); one end of one cable is connected to the incoming busbar (39) in one of the thyristor press-fit structures (9), one end of another cable is connected to the outgoing busbar (33) in another thyristor press-fit structure (9), and the other ends of both cables are connected to the bypass switch assembly (50).

[0035] The two thyristor trigger switches are connected by a busbar. One end of the busbar is connected to the incoming busbar (39) in one thyristor press-fit structure (9), and the other end is connected to the outgoing busbar (33) in another thyristor press-fit structure (9).

[0036] The two resistor towers are connected in a Z-shape by a busbar.

[0037] The static voltage equalizing resistor assembly (11) includes multiple static voltage equalizing resistors, which are fixed between the lower aluminum alloy plate (8) and the upper aluminum alloy plate (15) by two insulating plates.

[0038] The number of heat sinks (17) is one more than the number of thyristor devices (16);

[0039] The number of damping resistors (19), the number of energy-collecting resistors (26), the total number of static voltage equalizing resistors (11), and the number of thyristor devices (16) are equal.

[0040] The technical solution provided by this invention has the following beneficial effects:

[0041] The high-voltage DC energy dissipation device provided by the present invention includes a surge arrester body (10), a trigger switch assembly (20), a resistor tower assembly (30), a reactor assembly (40), a bypass switch assembly (50), and a base assembly (60); the surge arrester body (10), the trigger switch assembly (20), and the resistor tower assembly (30) are all vertical structures, and the surge arrester body (10) and the resistor tower assembly (30) are arranged in layers. The surge arrester body (10) is located on the upper part of the base assembly (60), and the resistor tower assembly (30) is located on the upper part of the trigger switch assembly (20). The surge arrester body (10) is connected in layers to the trigger switch assembly (20) and the resistor tower assembly (30). The reactor assembly (40) and the bypass switch assembly (50) are both connected to the trigger switch assembly (20). The device has low manufacturing cost, compact structure, and small footprint.

[0042] In this invention, the thyristor trigger switch assembly uses two parallel thyristor trigger switches, which are easy to manufacture, simple to control, and economical.

[0043] The surge arrester body (10) in this invention adopts a direct-connect large component array method. The surge arrester body (10), trigger switch assembly (20), resistor tower assembly (30), reactor assembly (40), and bypass switch assembly (50) are arranged in functional areas, which is compact and facilitates the arrangement of optical fiber cables.

[0044] In this invention, the resistor tower assembly (30) is located above the trigger switch assembly (20). The height of the thyristor trigger switch assembly 20 is consistent with the height of the controlled part 4 in the surge arrester body 10, which can effectively make the transient electric field between the thyristor trigger switch and the surge arrester body 10 present a uniform distribution.

[0045] The base assembly (60) of this invention includes an insulator assembly, multiple crossarm insulators (2), multiple steel platforms (27), and multiple high-voltage insulators (29). Each insulator assembly includes multiple single-row insulators (1) and multiple inclined insulators (3). The multiple steel platforms (27) are located on the upper part of the insulator assembly and are located on the same horizontal plane. Adjacent steel platforms (27) are connected by crossarm insulators (2), which can ensure that there is no transient current diversion between steel platforms, and can also reduce the amount of on-site assembly and reduce on-site installation requirements. At the same time, the single-row insulators (1) are anti-vibration through inclined insulators (3). The base assembly (60) forms a box-shaped structure as a whole, with good overall seismic performance, which is convenient for inspection and maintenance.

[0046] In this invention, the first fixed part (5), the second fixed part (37) and the controlled part (4) all include multiple resistor units arranged in sequence. By adjusting the number of resistors inside the resistor unit, the energy dissipation device has a high rated voltage and a low operating charge rate during normal operation, and its operating reliability is also high.

[0047] In this invention, there are no obstructions around the thyristor trigger switch assembly 20 and the bypass switch assembly 50, so they can be maintained through the maintenance channel when a fault occurs. Attached Figure Description

[0048] Figure 1 This is a perspective view of the high-voltage DC energy dissipation device in an embodiment of the present invention;

[0049] Figure 2 This is a top view of the high-voltage DC energy dissipation device in an embodiment of the present invention;

[0050] Figure 3 This is a perspective view of the base assembly in an embodiment of the present invention;

[0051] Figure 4 This is a perspective view of the surge arrester body in an embodiment of the present invention;

[0052] Figure 5 This is a perspective view of the thyristor-triggered switch in an embodiment of the present invention;

[0053] Figure 6 This is a top view of the thyristor-triggered switch in an embodiment of the present invention;

[0054] Figure 7 This is a perspective view of the thyristor press-fit structure in an embodiment of the present invention;

[0055] Figure 8 This is a front view of the resistor tower in an embodiment of the present invention;

[0056] Figure 9 This is a structural diagram of the reactor assembly in an embodiment of the present invention;

[0057] Figure 10 This is an electrical schematic diagram of the high-voltage DC energy dissipation device in an embodiment of the present invention;

[0058] In the diagram, 1-single-row insulator; 2-crossarm insulator; 3-diagonal insulator; 4-controlled part; 5-first fixed part; 6-interlayer shielding ring for resistor tower; 7-post insulator for thyristor-triggered switch; 8-aluminum alloy lower plate; 9-thyristor press-fit structure; 10-surge arrester body; 11-static equalizing resistor assembly; 12-damping capacitor assembly; 13-fiber optic trough; 14-support insulator for thyristor-triggered switch; 15-aluminum alloy upper plate; 16-thyristor device; 17-heat sink; 18-insulating tie rod; 19-damping resistor installed on the heat sink; 20-thyristor-triggered switch assembly; 21-interlayer support insulator. 22-Aluminum alloy plate; 23-Insulating connection plate; 24-Equalizing resistor assembly; 25-Control board assembly; 26-Energy extraction resistor installed on the heat sink; 27-Steel platform; 28-Connector; 29-High voltage insulator; 30-Resistor tower assembly; 31-Current-carrying busbar; 32-Shielding ring for surge arrester body; 33-Outgoing busbar; 34-Insulating bracket; 35-Reactor; 36-Pressure-fit end plate; 37-Second fixed part; 38-Post insulator for reactor; 39-Incoming busbar; 40-Reactor assembly; 41-Shielding ring for thyristor-triggered switch; 50-Bypass switch assembly; 60-Base assembly. Detailed Implementation

[0059] The present invention will now be described in further detail with reference to the accompanying drawings.

[0060] This invention provides a high-voltage direct current energy dissipation device, such as... Figure 1 and Figure 2 As shown, it includes a surge arrester body 10, a trigger switch assembly 20, a resistor tower assembly 30, a reactor assembly 40, a bypass switch assembly 50, and a base assembly 60;

[0061] The surge arrester body 10, the trigger switch assembly 20, and the resistor tower assembly 30 are all vertical structures. The surge arrester body 10 and the resistor tower assembly 30 are arranged in layers. The surge arrester body 10 is located on the upper part of the base assembly 60, and the resistor tower assembly 30 is located on the upper part of the trigger switch assembly 20. The surge arrester body 10 is connected to the trigger switch assembly 20 and the resistor tower assembly 30 in layers. The reactor assembly 40 and the bypass switch assembly 50 are both connected to the trigger switch assembly 20.

[0062] Trigger switch assembly 20 includes two thyristor trigger switches arranged in parallel, and resistor tower assembly 30 includes two resistor towers arranged in parallel.

[0063] Both the thyristor-triggered switch and the resistor tower adopt a vertical structure, with the resistor tower located above the thyristor-triggered switch.

[0064] In this embodiment of the invention, the thyristor-triggered switch assembly 20 and the resistor tower assembly 30 are arranged between the surge arrester body 10 and the bypass switch assembly 50. The height of the thyristor-triggered switch assembly 20 is consistent with the height of the controlled part 4 in the surge arrester body 10, which can effectively make the electric field between the thyristor-triggered switch and the surge arrester body 10 present a uniform distribution.

[0065] Since the overall weight of the resistor tower assembly 30 is relatively light, the strong seismic resistance of the surge arrester body 10 is fully utilized in terms of support and reinforcement. The fixed support beams extending from the surge arrester body 10 are used for auxiliary reinforcement, thereby reducing the strength requirements of the insulators in the resistor tower assembly 30.

[0066] like Figure 5 and Figure 6 As shown, the thyristor-triggered switch includes two post insulators 7 for thyristor-triggered switches, four shielding rings 41 for thyristor-triggered switches, an aluminum alloy lower plate 8, a thyristor press-fit structure 9, two static voltage equalizing resistor assemblies 11, two damping capacitor assemblies 12, an optical fiber slot 13, four support insulators 14 for thyristor-triggered switches, an aluminum alloy upper plate 15, and two control board assemblies 25.

[0067] Two thyristor-triggered switch support insulators 7 are vertically and parallelly arranged at the lower part of the aluminum alloy lower plate 8 to support the aluminum alloy lower plate 8 and the part above it. The aluminum alloy lower plate 8 and the aluminum alloy upper plate 15 are horizontally and parallelly arranged. Two thyristor-triggered switch shielding rings 41 are located on the outside of the aluminum alloy lower plate 8, and the other two thyristor-triggered switch shielding rings 41 are located on the outside of the aluminum alloy upper plate 15. Four thyristor-triggered switch support insulators 14 are vertically and parallelly arranged between the aluminum alloy lower plate 8 and the aluminum alloy upper plate 15. The thyristor press-fit structure 9 is fixed at the upper center position of the aluminum alloy lower plate 8, and two thyristor-triggered switch support insulators 14 are also included. A static voltage equalizing resistor assembly 11, a damping capacitor assembly 12, and a control board assembly 25 are evenly arranged on one side of the thyristor press-fit structure 9. The remaining two thyristor trigger switch support insulators 14, another static voltage equalizing resistor assembly 11, another damping capacitor assembly 12, and another control board assembly 25 are evenly arranged on the other side of the thyristor press-fit structure 9. The fiber optic groove 13 is located between the two thyristor trigger switch support insulators 7, and one end of the fiber optic groove 13 is connected to the aluminum alloy lower plate 8. The thyristor trigger switch adopts an online energy harvesting + laser energy transmission structure. The energy transmission fiber and trigger fiber in the fiber optic groove 13 are introduced into the local trench through the fiber optic groove 13. The thyristor trigger switch assembly 20 in this embodiment of the invention includes two thyristor trigger switches, which are connected by a busbar. The thyristor trigger switch assembly 20 adopts a lightweight design and has a small mass, so each thyristor trigger switch is supported and fixed by two thyristor trigger switch support insulators 7. In this embodiment of the invention, the lower aluminum alloy plate 8 and the upper aluminum alloy plate 15 are used to fix the components inside the valve section, and can also serve as dustproof and electric field shielding.

[0068] like Figure 7 As shown, the thyristor press-fit structure 9 includes multiple thyristor devices 16, multiple heat sinks 17, an inlet busbar 39, an outlet busbar 33, two press-fit end plates 36, and four insulating tie rods 18.

[0069] Two press-fit end plates 36 are arranged in parallel, and four insulating tie rods 18 are also arranged in parallel. The two press-fit end plates 36 are fixed by the four insulating tie rods 18. Thyristor devices 16 and heat sinks 17 are arranged sequentially and alternately within the space formed by the two press-fit end plates 36 and the four insulating tie rods 18. An inlet busbar 39 is fixed between one of the press-fit end plates 36 and the first heat sink 17, and an outlet busbar 33 is fixed between the other press-fit end plate 36 and the last heat sink 17. The number of heat sinks 17 is one more than the number of thyristor devices 16. In this embodiment of the invention, there are 11 heat sinks 17 and 10 thyristor devices 16.

[0070] The number of damping resistors 19, the number of energy extraction resistors 26, the total number of static voltage equalizing resistors 11, and the number of thyristor devices 16 are equal. In order to reduce the module design space, the energy extraction resistors 26 and damping resistors 19 are arranged on the heat sink, with one energy extraction resistor 26 and one damping resistor 19 arranged on each heat sink.

[0071] The thyristor-triggered switch assembly 20 is placed on a horizontal plane. Specifically, the support insulator 7 for the thyristor-triggered switch is installed first, and the lower aluminum alloy plate 8 is installed on the support insulator 7. The thyristor press-fit structure 9 is fixed on the lower aluminum alloy plate 8. Then, the control board assembly 25, the static equalizing resistor assembly 11, and the damping capacitor assembly 12 are installed on both sides in sequence. Then, the support insulator 14 for the thyristor-triggered switch is installed. Finally, the upper aluminum alloy plate 15 is installed and each assembly is fixedly assembled with the upper aluminum alloy plate 15. The shielding rings 41 for the thyristor-triggered switch are installed on the outer sides of the upper aluminum alloy plate 15 and the lower aluminum alloy plate 8, respectively.

[0072] like Figure 8 As shown, the resistor tower includes a multi-layer resistor structure, which is arranged vertically in sequence.

[0073] Each layer of the resistor structure includes two interlayer shielding rings 6 for resistor towers, four interlayer insulators 21, two aluminum alloy plates 22, an insulating connecting plate 23, and a voltage equalizing resistor assembly 24;

[0074] Four interlayer insulators 21 are arranged vertically and in parallel. One aluminum alloy plate 22 is located on top of two of the interlayer insulators 21, and the other aluminum alloy plate 22 is located on top of the remaining two interlayer insulators 21. The two aluminum alloy plates 22 are connected by an insulating connecting plate 23. The voltage equalizing resistor assembly 24 is located on top of the insulating connecting plate 23 and is connected to the two aluminum alloy plates 22. Two resistor towers are respectively set on the outside of the two aluminum alloy plates 22 by interlayer shielding rings 6.

[0075] The installation process of the resistor tower is as follows: First, install four interlayer insulators 21, then install the two aluminum alloy plates of the bottom layer (these two aluminum alloy plates are of the same specification, but the installation method is different) and the intermediate connecting insulation plate 23 in sequence. Next, place the equalizing resistor assembly 24. After the first layer of resistor structure is installed, follow this order to complete the stacking of all resistor structures from bottom to top to form a row of resistor towers. Finally, install the interlayer shielding ring 6 for the resistor tower.

[0076] like Figure 4 As shown, the surge arrester body 10 includes a first fixed part 5, a second fixed part 37, a controlled part 4, and a current-carrying busbar 31;

[0077] The current-carrying busbar 31 is located on the upper part of the first fixed part 5, and the first fixed part 5, the second fixed part 37 and the controlled part 4 are arranged in order from top to bottom.

[0078] A surge arrester body shielding ring 32 is provided at the top of the first fixed part 5, between the first fixed part 5 and the second fixed part 37, and between the second fixed part 37 and the controlled part 4.

[0079] like Figure 9 As shown, the reactor assembly 40 includes an insulating support 34, two reactor post insulators 38, and two reactors 35;

[0080] Two reactors 35 are fixed to the upper part of the insulating support 34, and the insulating support 34 is fixed to the upper part of the two reactor post insulators 38. The two reactors 35 are connected by a busbar.

[0081] The reactor assembly 40 is independent of the horizontal plane. Specifically, two reactor post insulators 38 can be installed first, the insulating bracket 34 can be fixed to the two reactor post insulators 38, and then the two reactors 35 can be fixedly connected to the insulating bracket 34 respectively.

[0082] like Figure 3 As shown, the base assembly 60 includes an insulator assembly, multiple crossarm insulators 2, multiple steel platforms 27, and multiple high-voltage insulators 29;

[0083] Multiple steel platforms 27 are located on the upper part of the insulator assembly and are on the same horizontal plane. Adjacent steel platforms 27 are connected by crossarm insulators 2. All high-voltage insulators 29 are evenly arranged on the upper part of the steel platforms 27.

[0084] The insulator assembly includes multiple single-row insulators 1 and multiple inclined insulators 3;

[0085] All single-row insulators 1 are arranged vertically and parallel, and adjacent single-row insulators 1 are connected by inclined tie insulators 3. In this embodiment of the invention, the base assembly 60 adopts a direct-connected large component array, there are 4 steel platforms 27, and the high-voltage insulators 29 are 10kV insulators.

[0086] The surge arrester body 10 and the trigger switch assembly 20 are connected by two busbars;

[0087] One end of one of the busbars is connected to the lower end of the controlled part 4, and the other end is connected to the aluminum alloy lower plate 8;

[0088] One end of the other busbar is connected to the upper end of the controlled part 4, and the other end is connected to the aluminum alloy upper plate 15.

[0089] The surge arrester body 10 is connected to the resistor tower assembly 30 via six connectors 28 and a busbar.

[0090] The six connectors 28 are arranged in three layers, with two connectors per layer. One end of the two connectors 28 in the first layer is connected to the upper end of the first fixed part 5, one end of the two connectors 28 in the second layer is connected to the lower end of the first fixed part 5, and one end of the two connectors 28 in the third layer is connected to the lower end of the second fixed part 37. The other ends of the two connectors 28 in the first layer and the two connectors 28 in the second layer are connected to the corresponding aluminum alloy plate 22, and the other ends of the two connectors 28 in the third layer are connected to the aluminum alloy upper plate 15.

[0091] One end of the busbar is connected to the current-carrying busbar 31, and the other end is connected to the aluminum alloy plate 22.

[0092] The trigger switch assembly 20 and the reactor assembly 40 are connected by two busbars;

[0093] The trigger switch assembly 20 and the bypass switch assembly 50 are connected by two cables;

[0094] One end of one busbar is connected to the incoming busbar 39 in one of the thyristor press-fit structures 9, and the other end is connected to one of the reactors 35; one end of another busbar is connected to the outgoing busbar 33 in another thyristor press-fit structure 9, and the other end is connected to another reactor 35; one end of one cable is connected to the incoming busbar 39 in one of the thyristor press-fit structures 9, one end of another cable is connected to the outgoing busbar 33 in another thyristor press-fit structure 9, and the other ends of both cables are connected to the bypass switch assembly 50.

[0095] The two thyristor-triggered switches are connected by a busbar. One end of the busbar is connected to the incoming busbar 39 in one thyristor press-fit structure 9, and the other end is connected to the outgoing busbar 33 in another thyristor press-fit structure 9.

[0096] The two resistor towers are connected in a Z-shape by busbars. That is, one of the two aluminum alloy plates 22 in each layer is used as the input plate and the other is used as the output plate. The output plate of the upper layer is connected to the input plate of the lower layer, and the output plate of the lower layer is connected to the input plate of the layer below. The whole structure is connected in a Z-shape.

[0097] The static voltage equalizing resistor assembly 11 includes multiple static voltage equalizing resistors, which are fixed between the lower aluminum alloy plate 8 and the upper aluminum alloy plate 15 by two insulating plates.

[0098] The electrical schematic diagram of the high-voltage DC energy dissipation device provided in this embodiment of the invention is as follows: Figure 10 As shown, MOA1 is the fixed part (including the first fixed part 5 and the second fixed part 37) in the surge arrester body 10, and MOA2 is the controlled part 4 in the surge arrester body 10. eqFor resistor tower assembly 30, K is thyristor press-fit structure 9, K1 is bypass switch assembly 50, R D The damping resistor is 19, R P C is the voltage equalizing resistor in the static voltage equalizing resistor assembly 11. D L is the damping capacitor in the damping capacitor assembly 12. V For reactor 35.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Those skilled in the art can still make modifications or equivalent substitutions to the specific implementation of the present invention by referring to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the present invention pending approval.

Claims

1. A high-voltage direct current energy dissipation device, characterized in that, It includes a surge arrester body (10), a trigger switch assembly (20), a resistor tower assembly (30), a reactor assembly (40), a bypass switch assembly (50), and a base assembly (60). The surge arrester body (10), the trigger switch assembly (20), and the resistor tower assembly (30) are all vertical structures, and the surge arrester body (10) and the resistor tower assembly (30) are arranged in layers. The surge arrester body (10) is located on the upper part of the base assembly (60), and the resistor tower assembly (30) is located on the upper part of the trigger switch assembly (20). The surge arrester body (10) is connected in layers to the trigger switch assembly (20) and the resistor tower assembly (30). The reactor assembly (40) and the bypass switch assembly (50) are both connected to the trigger switch assembly (20).

2. The high-voltage DC energy dissipation device according to claim 1, characterized in that, The trigger switch assembly (20) includes two parallel thyristor trigger switches, and the resistor tower assembly (30) includes two parallel resistor towers; both the thyristor trigger switches and the resistor towers adopt a vertical structure; and the resistor towers are located above the thyristor trigger switches.

3. The high-voltage DC energy dissipation device according to claim 2, characterized in that, The thyristor trigger switch includes two post insulators (7) for thyristor trigger switches, four shielding rings (41) for thyristor trigger switches, an aluminum alloy lower plate (8), a thyristor press-fit structure (9), two static equalizing resistor assemblies (11), two damping capacitor assemblies (12), an optical fiber slot (13), four support insulators (14) for thyristor trigger switches, an aluminum alloy upper plate (15), and two control board assemblies (25). The two thyristor-triggered switch post insulators (7) are vertically and parallelly arranged at the lower part of the aluminum alloy lower plate (8). The aluminum alloy lower plate (8) and the aluminum alloy upper plate (15) are horizontally and parallelly arranged. Two thyristor-triggered switch shielding rings (41) are located on the outside of the aluminum alloy lower plate (8), and the other two thyristor-triggered switch shielding rings (41) are located on the outside of the aluminum alloy upper plate (15). The four thyristor-triggered switch support insulators (14) are vertically and parallelly arranged between the aluminum alloy lower plate (8) and the aluminum alloy upper plate (15). The thyristor press-fit structure (9) is fixed at the upper center of the aluminum alloy lower plate (8), of which two are... The supporting insulator (14), a static equalizing resistor assembly (11), a damping capacitor assembly (12), and a control board assembly (25) for the thyristor trigger switch are evenly arranged on one side of the thyristor press-fit structure (9), and the other two supporting insulators (14), another static equalizing resistor assembly (11), another damping capacitor assembly (12), and another control board assembly (25) for the thyristor trigger switch are evenly arranged on the other side of the thyristor press-fit structure (9); the fiber optic slot (13) is located between the two support insulators (7) for the thyristor trigger switch, and one end of the fiber optic slot (13) is connected to the aluminum alloy lower plate (8).

4. The high-voltage DC energy dissipation device according to claim 3, characterized in that, The thyristor press-fit structure (9) includes multiple thyristor devices (16), multiple heat sinks (17), an inlet busbar (39), an outlet busbar (33), two press-fit end plates (36), and four insulating tie rods (18). The two press-fit end plates (36) are arranged in parallel, and the four insulating tie rods (18) are arranged in parallel. The two press-fit end plates (36) are fixed by the four insulating tie rods (18). The thyristor device (16) and the heat sink (17) are arranged in sequence at intervals within the space formed by the two press-fit end plates (36) and the four insulating tie rods (18). The incoming busbar (39) is fixed between one of the press-fit end plates (36) and the first heat sink (17). The outgoing busbar (33) is fixed between the other press-fit end plate (36) and the last heat sink (17).

5. The high-voltage DC energy dissipation device according to claim 4, characterized in that, The heat sink (17) is provided with a damping resistor (19) and a power extraction resistor (26).

6. The high-voltage DC energy dissipation device according to claim 3, characterized in that, The resistor tower comprises a multi-layer resistor structure, which is arranged vertically in sequence.

7. The high-voltage DC energy dissipation device according to claim 6, characterized in that, Each layer of the resistor structure includes two interlayer shielding rings (6) for resistor towers, four interlayer insulators (21), two aluminum alloy plates (22), an insulating connecting plate (23), and a voltage equalizing resistor assembly (24). The four interlayer insulators (21) are arranged vertically and in parallel. One aluminum alloy plate (22) is located on the upper part of two of the interlayer insulators (21), and the other aluminum alloy plate (22) is located on the upper part of the remaining two interlayer insulators (21). The two aluminum alloy plates (22) are connected by an insulating connecting plate (23). The voltage equalizing resistor assembly (24) is located on the upper part of the insulating connecting plate (23) and is connected to the two aluminum alloy plates (22). The two resistor towers are respectively set on the outside of the two aluminum alloy plates (22) by interlayer shielding rings (6).

8. The high-voltage DC energy dissipation device according to claim 7, characterized in that, The surge arrester body (10) includes a first fixed part (5), a second fixed part (37), a controlled part (4), and a current-carrying busbar (31). The busbar (31) is located above the first fixed part (5), and the first fixed part (5), the second fixed part (37) and the controlled part (4) are arranged sequentially from top to bottom.

9. The high-voltage DC energy dissipation device according to claim 8, characterized in that, A lightning arrester body shielding ring (32) is provided at the top of the first fixed part (5), between the first fixed part (5) and the second fixed part (37), and between the second fixed part (37) and the controlled part (4).

10. The high-voltage DC energy dissipation device according to claim 3, characterized in that, The reactor assembly (40) includes an insulating support (34), two reactor post insulators (38) and two reactors (35). The two reactors (35) are fixed on the upper part of the insulating support (34), and the insulating support (34) is fixed on the upper part of the two reactor post insulators (38). The two reactors (35) are connected by a busbar.

11. The high-voltage DC energy dissipation device according to claim 1, characterized in that, The base assembly (60) includes an insulator assembly, multiple crossarm insulators (2), multiple steel platforms (27) and multiple high-voltage insulators (29). The multiple steel platforms (27) are located on the upper part of the insulator assembly and on the same horizontal plane. Adjacent steel platforms (27) are connected by crossarm insulators (2). All high-voltage insulators (29) are evenly arranged on the upper part of the steel platforms (27).

12. The high-voltage DC energy dissipation device according to claim 11, characterized in that, The insulator assembly includes multiple single-row insulators (1) and multiple inclined insulators (3); All single-row insulators (1) are arranged vertically and in parallel, and adjacent single-row insulators (1) are connected by inclined insulators (3).

13. The high-voltage DC energy dissipation device according to claim 8, characterized in that, The surge arrester body (10) and the trigger switch assembly (20) are connected by two busbars; One end of one of the busbars is connected to the lower end of the controlled part (4), and the other end is connected to the aluminum alloy lower plate (8); One end of the other busbar is connected to the upper end of the controlled part (4), and the other end is connected to the aluminum alloy upper plate (15).

14. The high-voltage DC energy dissipation device according to claim 8, characterized in that, The surge arrester body (10) is connected to the resistor tower assembly (30) via six connectors (28) and a busbar; The six connectors (28) are arranged in three layers, with two connectors per layer. One end of the two connectors (28) in the first layer is connected to the upper end of the first fixed part (5), one end of the two connectors (28) in the second layer is connected to the lower end of the first fixed part (5), one end of the two connectors (28) in the third layer is connected to the lower end of the second fixed part (37), the other end of the two connectors (28) in the first layer and the two connectors (28) in the second layer are both connected to the corresponding aluminum alloy plate (22), and the other end of the two connectors (28) in the third layer are both connected to the aluminum alloy upper plate (15). One end of the busbar is connected to the flow busbar (31), and the other end is connected to the aluminum alloy plate (22).

15. The high-voltage DC energy dissipation device according to claim 10, characterized in that, The trigger switch assembly (20) and the reactor assembly (40) are connected by two busbars; The trigger switch assembly (20) and the bypass switch assembly (50) are connected by two cables; One end of one busbar is connected to the incoming busbar (39) in one of the thyristor press-fit structures (9), and the other end is connected to one of the reactors (35); one end of another busbar is connected to the outgoing busbar (33) in another thyristor press-fit structure (9), and the other end is connected to another reactor (35); one end of one cable is connected to the incoming busbar (39) in one of the thyristor press-fit structures (9), one end of another cable is connected to the outgoing busbar (33) in another thyristor press-fit structure (9), and the other ends of both cables are connected to the bypass switch assembly (50).

16. The high-voltage DC energy dissipation device according to claim 8, characterized in that, The two thyristor trigger switches are connected by a busbar. One end of the busbar is connected to the incoming busbar (39) in one thyristor press-fit structure (9), and the other end is connected to the outgoing busbar (33) in another thyristor press-fit structure (9).

17. The high-voltage DC energy dissipation device according to claim 8, characterized in that, The two resistor towers are connected in a Z-shape by a busbar.

18. The high-voltage DC energy dissipation device according to claim 5, characterized in that, The static voltage equalization resistor assembly (11) includes multiple static voltage equalization resistors, which are fixed between the lower aluminum alloy plate (8) and the upper aluminum alloy plate (15) by two insulating plates.

19. The high-voltage DC energy dissipation device according to claim 18, characterized in that, The number of heat sinks (17) is one more than the number of thyristor devices (16); The number of damping resistors (19), the number of energy-collecting resistors (26), the total number of static voltage equalizing resistor components (11), and the number of thyristor devices (16) are equal.

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