A quick working condition switching device for pumped storage unit protection debugging

Abstract

The application discloses a quick working condition switching device for pumped storage unit protection debugging, which comprises a bus, an air switch, a fuse, a button assembly, a first relay group directly controlled by the button assembly, a linkage contact group, a second relay group controlled by the linkage contact group, and a wiring hole plate connected by contacts of the second relay group. The button assembly comprises a first button SB1 corresponding to a power generation working condition, a second button SB2 corresponding to a phase modulation working condition, a third button SB3 corresponding to a power generation starting working condition, a fourth button SB4 corresponding to a pumping working condition, a fifth button SB5 corresponding to a pumping phase modulation working condition, a sixth button SB6 corresponding to a drag motor working condition, a seventh button SB7 corresponding to a dragged motor working condition, an eighth button SB8 corresponding to an electric braking working condition, and a ninth button SB9 corresponding to a black start working condition. The device can improve the efficiency and safety of unit protection debugging.

Description

Technical Field

[0001] This invention relates to a rapid operating condition switching device, and more particularly to a rapid operating condition switching device for the protection and commissioning of pumped storage units. Background Technology

[0002] Pumped storage units combine the two basic operating modes of water pumps and turbines, and have multiple operating modes. They generally have more than a dozen operating conditions, including power generation operation, power generation phase adjustment, pumping operation, pumping phase adjustment, SFC start, back-to-back start, back-to-back drive, power generation start, electric braking, and rotating standby. The units have more than 30 protection functions. Under each operating condition, some protection functions may not be applicable and may cause malfunctions, posing significant safety hazards. Summary of the Invention

[0003] The purpose of this invention is to provide a rapid operating condition switching device for the protection and commissioning of pumped storage units. It can improve the efficiency and safety of unit protection and commissioning.

[0004] The technical solution of the present invention is as follows: A rapid operating condition switching device for protection and commissioning of pumped storage units, comprising a bus, an air switch, a fuse, a button assembly, a first relay group directly controlled by the button assembly, a linkage contact group, a second relay group controlled by the linkage contact group, and a wiring hole plate connected to the contacts of the second relay group. The button assembly includes a first button SB1 corresponding to the power generation operating condition, a second button SB2 corresponding to the phase adjustment operating condition, a third button SB3 corresponding to the power generation start-up operating condition, a fourth button SB4 corresponding to the pumping operating condition, a fifth button SB5 corresponding to the pumping phase adjustment operating condition, a sixth button SB6 corresponding to the tractor operating condition, a seventh button SB7 corresponding to the driven tractor operating condition, an eighth button SB8 corresponding to the electric braking operating condition, and a ninth button SB9 corresponding to the black start operating condition.

[0005] In the aforementioned rapid operating condition switching device for protection and commissioning of pumped storage units, the linkage contact group includes a first linkage contact S1, a second linkage contact S2, a third linkage contact S3, a fourth linkage contact S4, a fifth linkage contact S5, a sixth linkage contact S6, a seventh linkage contact S7, an eighth linkage contact S8, and a ninth linkage contact S9.

[0006] In the aforementioned rapid operating condition switching device for protection and commissioning of pumped storage units, the first relay group includes a first relay K21, a second relay K22, a third relay K23, a fourth relay K24, a fifth relay K25, a sixth relay K26, a seventh relay K27, an eighth relay K28, and a ninth relay K29; the first relay K21 corresponds to the first linkage contact S1 and the second linkage contact S2; the second relay K22 corresponds to the first linkage contact S1, the second linkage contact S2, and the ninth linkage contact S9; the third relay K23 corresponds to the second linkage contact S2; the fourth relay K24 corresponds to the first linkage contact S1 and the fourth linkage contact S4; the fifth linkage contact S5 corresponds to the first linkage contact S1, the second linkage contact S2, and the ninth linkage contact S9; the sixth linkage contact S6 corresponds to the fifth linkage contact S5; the seventh relay K27 corresponds to the fourth linkage contact S4; the eighth relay K28 corresponds to the sixth linkage contact S6; and the ninth relay K29 corresponds to the eighth linkage contact S8.

[0007] In the aforementioned rapid operating condition switching device for protection and commissioning of pumped storage units, the second relay group includes the tenth relay K11, the eleventh relay K12, the twelfth relay K13, the thirteenth relay K14, the fourteenth relay K15, the fifteenth relay K16, the sixteenth relay K17, the seventeenth relay K18, and the eighteenth relay K19; the tenth relay K11 is connected in series with the first linkage contact S1; the eleventh relay K12 is connected in series with the second linkage contact S2; the twelfth relay K13 is connected in series with the third linkage contact S3; the thirteenth relay K14 is connected in series with the fourth linkage contact S4; the fourteenth relay K15 is connected in series with the fifth linkage contact S5; the fifteenth relay K16 is connected in series with the sixth linkage contact S6; the sixteenth relay K17 is connected in series with the seventh linkage contact S7; the seventeenth relay K18 is connected in series with the eighth linkage contact S8; and the eighteenth relay K19 is connected in series with the ninth linkage contact S9.

[0008] In the aforementioned rapid operating condition switching device for protection and commissioning of pumped storage units, the button assembly is provided with a protective shell to protect the button assembly.

[0009] In the aforementioned rapid operating condition switching device for protection and commissioning of pumped storage units, the protective shell includes a frame-shaped support connected to the outside of the button assembly. The frame-shaped support is provided with a cover plate that can be separated from the frame-shaped support. A lock is provided under the cover plate. The upper end face of the frame-shaped support is provided with a stepped groove for installing the cover plate. A lock seat corresponding to the lock is provided under the stepped groove. A first sealing gasket is provided in the stepped groove. A second sealing gasket is provided on the connection surface between the frame-shaped support and the button assembly. A connecting angle iron is provided outside the frame-shaped support.

[0010] In the aforementioned rapid operating condition switching device for protection and commissioning of pumped storage units, the lock includes a mounting base installed at the lower middle part of the cover plate. The mounting base is provided with a bidirectional lead screw and a guide rod in the same direction as the length of the cover plate. Both ends of the bidirectional lead screw and the guide rod are provided with lead screw seats. The lead screw seats are provided with locking blocks corresponding to the lock seats. The mounting base is provided with a first bevel gear fixed in the middle of the bidirectional lead screw. A second bevel gear corresponding to the first bevel gear is provided on one side of the first bevel gear. A rotating sleeve fixed in the cover plate is provided on one side of the second bevel gear. The bottom of the rotating sleeve is provided with a mating groove.

[0011] In the aforementioned rapid operating condition switching device for protection and commissioning of pumped storage units, the lock seat includes a support plate located on the underside of the cover plate and parallel to the cover plate, and a wedge block is provided on the side of the support plate away from the cover plate.

[0012] In the aforementioned rapid operating condition switching device for the protection and commissioning of pumped storage units, the cover plate is provided with a slot corresponding to the rotating sleeve.

[0013] Compared with existing technologies, the present invention can realize the rapid switching of protection and commissioning conditions of pumped storage units through button components, improve commissioning and testing efficiency, reduce the possibility of errors during condition switching, and improve safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the control section of the present invention;

[0016] Figure 3 This is a schematic diagram of the wiring hole plate of the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the protective shell of the present invention.

[0018] The markings in the attached diagram are as follows: 1-protective shell, 2-frame support, 3-cover plate, 4-step groove, 5-lock, 6-lock seat, 7-first sealing gasket, 8-second sealing gasket, 9-connecting angle iron, 10-mounting base, 11-double-acting screw, 12-guide rod, 13-screw seat, 14-lock block, 15-support plate, 16-wedge block, 17-first bevel gear, 18-second bevel gear, 19-rotating sleeve, 20-fitting groove, 21-slot. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0020] Example. Configuration as follows: Figure 1-4As shown, a rapid operating condition switching device for protection and commissioning of a pumped storage unit includes a bus, an air switch, a fuse, a button assembly, a first relay group directly controlled by the button assembly, a linkage contact group, a second relay group controlled by the linkage contact group, and a wiring hole plate connected to the contacts of the second relay group. The button assembly includes a first button SB1 corresponding to the power generation operating condition, a second button SB2 corresponding to the phase adjustment operating condition, a third button SB3 corresponding to the power generation start-up operating condition, a fourth button SB4 corresponding to the pumping operating condition, a fifth button SB5 corresponding to the pumping phase adjustment operating condition, a sixth button SB6 corresponding to the tractor operating condition, a seventh button SB7 corresponding to the driven tractor operating condition, an eighth button SB8 corresponding to the electric braking operating condition, and a ninth button SB9 corresponding to the black start operating condition.

[0021] The linkage contact group includes a first linkage contact S1, a second linkage contact S2, a third linkage contact S3, a fourth linkage contact S4, a fifth linkage contact S5, a sixth linkage contact S6, a seventh linkage contact S7, an eighth linkage contact S8, and a ninth linkage contact S9.

[0022] The first relay group includes a first relay K21, a second relay K22, a third relay K23, a fourth relay K24, a fifth relay K25, a sixth relay K26, a seventh relay K27, an eighth relay K28, and a ninth relay K29. The first relay K21 corresponds to the first linkage contact S1 and the second linkage contact S2; the second relay K22 corresponds to the first linkage contact S1, the second linkage contact S2, and the ninth linkage contact S9; the third relay K23 corresponds to the second linkage contact S2; the fourth relay K24 corresponds to the first linkage contact S1 and the fourth linkage contact S4; the fifth linkage contact S5 corresponds to the first linkage contact S1, the second linkage contact S2, and the ninth linkage contact S9; the sixth linkage contact S6 corresponds to the fifth linkage contact S5; the seventh relay K27 corresponds to the fourth linkage contact S4; the eighth relay K28 corresponds to the sixth linkage contact S6; and the ninth relay K29 corresponds to the eighth linkage contact S8.

[0023] The second relay group includes the tenth relay K11, the eleventh relay K12, the twelfth relay K13, the thirteenth relay K14, the fourteenth relay K15, the fifteenth relay K16, the sixteenth relay K17, the seventeenth relay K18, and the eighteenth relay K19; the tenth relay K11 is connected in series with the first linkage contact S1; the eleventh relay K12 is connected in series with the second linkage contact S2; the twelfth relay K13 is connected in series with the third linkage contact S3; the thirteenth relay K14 is connected in series with the fourth linkage contact S4; the fourteenth relay K15 is connected in series with the fifth linkage contact S5; the fifteenth relay K16 is connected in series with the sixth linkage contact S6; the sixteenth relay K17 is connected in series with the seventh linkage contact S7; the seventeenth relay K18 is connected in series with the eighth linkage contact S8; and the eighteenth relay K19 is connected in series with the ninth linkage contact S9.

[0024] The button assembly is provided with a protective shell 1 to protect the button assembly.

[0025] The protective shell 1 includes a frame-shaped support 2 attached to the outside of the button assembly. The frame-shaped support 2 is provided with a cover plate 3 that can be separated from the frame-shaped support 2. A lock 5 is provided under the cover plate 3. The upper end face of the frame-shaped support 2 is provided with a stepped groove 4 for installing the cover plate 3. A lock seat 6 corresponding to the lock 5 is provided under the stepped groove 4. A first sealing gasket 7 is provided in the stepped groove 4. A second sealing gasket 8 is provided on the connection surface between the frame-shaped support 2 and the button assembly. A connecting angle iron 9 is provided on the outside of the frame-shaped support 2.

[0026] The lock 5 includes a mounting base 10 installed at the lower middle part of the cover plate 3. The mounting base 10 is provided with a bidirectional lead screw 11 and a guide rod 12 in the same direction as the length of the cover plate 3. The two ends of the bidirectional lead screw 11 and the guide rod 12 are provided with lead screw seats 13. The lead screw seats 13 are provided with lock blocks 14 corresponding to the lock seat 6. The mounting base 10 is provided with a first bevel gear 17 fixed in the middle of the bidirectional lead screw 11. A second bevel gear 18 corresponding to the first bevel gear 17 is provided on one side of the first bevel gear 17. A rotating sleeve 19 fixed in the cover plate 3 is provided on one side of the second bevel gear 18. The bottom of the rotating sleeve 19 is provided with a mating groove 20.

[0027] The lock seat 6 includes a support plate 15 located on the lower side of the cover plate 3 and parallel to the cover plate 3, and a wedge block 16 is provided on the side of the support plate 15 away from the cover plate 3.

[0028] The cover plate 3 is provided with a slot 21 corresponding to the rotating sleeve 19.

[0029] This application is powered by 220V AC. The device is energized after the air switch is closed, and the fuse protects the device from overcurrent. For rapid switching between different operating conditions, the button assembly is first reset. Indicator lights can be installed on each button; when a button is pressed to connect to the line, the indicator lights illuminate, facilitating button status identification. Then, the operating condition is switched as required, achieved by adjusting the control button assembly. The contact and disconnector signal status during switching is shown in the table below:

[0030] Buttons SB1-SB9 correspond to the operating conditions and control switch position signals

[0031]

[0032] To switch to generator mode, simply press the first button SB1. Pressing SB1 activates the first relay K21, which in turn controls its corresponding first and second linkage contacts S1 and S2, thus controlling the tenth and eleventh relays K11 and K12. The contact signals of these relays can then be connected to the unit's relay protection device via wires. This allows the protection device to determine the unit's operating condition and effectively enable or disable relevant protection functions. This enables rapid switching of operating conditions. The disconnector signal status corresponds to the contact signal of the second relay group. By inserting external wires into the wiring terminal block, the second relay contact signals are transmitted externally. The wires are connected to the terminal block of the protection device, allowing the protection device to automatically determine the operating condition based on the signals provided. The protection device then implements the corresponding protection function based on the determined operating condition. When switching to other operating conditions, first press the first button SB1, then press the corresponding button to switch the operating condition. This process is highly efficient.

[0033] Since the operation mode can be switched by pressing the button assembly, there is a possibility of accidental operation mode switching by non-professionals. Therefore, this application provides a protective shell 1 to protect the button assembly and prevent accidental operation by external personnel. The frame support 2 is fixed to the outside of the button assembly by fasteners and connecting angle iron 9. When the connecting angle iron is fixed, it can press the second sealing gasket 8. Then, the cover plate 3 is fixed in the stepped groove 4 of the frame support 2. Then, the external key is inserted into the rotating sleeve 19, so that the end of the key engages with the mating groove 20. The mating groove 20 can be a specially shaped mating groove, such as a dovetail shape, so that conventional tools cannot drive the rotating sleeve 19 to rotate. When the rotating sleeve 19 rotates, it can drive the two sets of lead screw seats 13 and the locking blocks 14 on the lead screw seats 13 to move simultaneously towards or away from each other along the bidirectional lead screw 11. When locking, the locking blocks 14 move away from the mounting seat 10. Finally, the locking blocks 14 will abut against the wedge block 16. During the movement, it will drive the cover plate 3 to press the first sealing gasket 7, improving the sealing effect. While protecting the button components, it also reduces the impact of external dust and moisture on the button components, resulting in better reliability.

Claims

1. A rapid operating condition switching device for protection and commissioning of pumped storage units, characterized in that, The system includes a bus, an air switch, a fuse, a button assembly, a first relay group directly controlled by the button assembly, a linkage contact group, a second relay group controlled by the linkage contact group, and a wiring hole plate connected to the contacts of the second relay group. The button assembly includes a first button SB1 corresponding to the power generation condition, a second button SB2 corresponding to the phase adjustment condition, a third button SB3 corresponding to the power generation start-up condition, a fourth button SB4 corresponding to the pumping condition, a fifth button SB5 corresponding to the pumping phase adjustment condition, a sixth button SB6 corresponding to the tractor condition, a seventh button SB7 corresponding to the driven tractor condition, an eighth button SB8 corresponding to the electric braking condition, and a ninth button SB9 corresponding to the black start condition. The linkage contact group includes a first linkage contact S1, a second linkage contact S2, a third linkage contact S3, a fourth linkage contact S4, a fifth linkage contact S5, a sixth linkage contact S6, a seventh linkage contact S7, an eighth linkage contact S8, and a ninth linkage contact S9. The first relay group includes a first relay K21, a second relay K22, a third relay K23, a fourth relay K24, a fifth relay K25, a sixth relay K26, a seventh relay K27, an eighth relay K28, and a ninth relay K29; The first relay K21 corresponds to the first linkage contact S1 and the second linkage contact S2; the second relay K22 corresponds to the first linkage contact S1, the second linkage contact S2, and the ninth linkage contact S9; the third relay K23 corresponds to the second linkage contact S2; the fourth relay K24 corresponds to the first linkage contact S1 and the fourth linkage contact S4; the fifth linkage contact S5 corresponds to the first linkage contact S1, the second linkage contact S2, and the ninth linkage contact S9; the sixth linkage contact S6 corresponds to the fifth linkage contact S5; the seventh relay K27 corresponds to the fourth linkage contact S4; the eighth relay K28 corresponds to the sixth linkage contact S6; and the ninth relay K29 corresponds to the eighth linkage contact S8. The button assembly is provided with a protective shell (1) to protect the button assembly; The protective shell (1) includes a frame support (2) attached to the outside of the button assembly. The frame support (2) is provided with a cover plate (3) that can be separated from the frame support (2). A lock (5) is provided under the cover plate (3). The upper end face of the frame support (2) is provided with a stepped groove (4) for installing the cover plate (3). A lock seat (6) corresponding to the lock (5) is provided under the stepped groove (4). A first sealing gasket (7) is provided in the stepped groove (4). A second sealing gasket (8) is provided on the connection surface between the frame support (2) and the button assembly. A connecting angle iron (9) is provided outside the frame support (2).

2. The rapid operating condition switching device for protection and commissioning of pumped storage units according to claim 1, characterized in that: The second relay group includes the tenth relay K11, the eleventh relay K12, the twelfth relay K13, the thirteenth relay K14, the fourteenth relay K15, the fifteenth relay K16, the sixteenth relay K17, the seventeenth relay K18, and the eighteenth relay K19; the tenth relay K11 is connected in series with the first linkage contact S1; the eleventh relay K12 is connected in series with the second linkage contact S2; the twelfth relay K13 is connected in series with the third linkage contact S3; the thirteenth relay K14 is connected in series with the fourth linkage contact S4; the fourteenth relay K15 is connected in series with the fifth linkage contact S5; the fifteenth relay K16 is connected in series with the sixth linkage contact S6; the sixteenth relay K17 is connected in series with the seventh linkage contact S7; the seventeenth relay K18 is connected in series with the eighth linkage contact S8; and the eighteenth relay K19 is connected in series with the ninth linkage contact S9.

3. The rapid operating condition switching device for protection and commissioning of pumped storage units according to claim 1, characterized in that: The lock (5) includes a mounting base (10) installed in the middle of the lower end of the cover plate (3). The mounting base (10) is provided with a bidirectional lead screw (11) and a guide rod (12) in the same direction as the length of the cover plate (3). The two ends of the bidirectional lead screw (11) and the guide rod (12) are provided with lead screw seats (13). The lead screw seats (13) are provided with lock blocks (14) corresponding to the lock seat (6). The mounting base (10) is provided with a first bevel gear (17) fixed in the middle of the bidirectional lead screw (11). A second bevel gear (18) corresponding to the first bevel gear (17) is provided on one side of the first bevel gear (17). A rotating sleeve (19) fixed in the cover plate (3) is provided on one side of the second bevel gear (18). A mating groove (20) is provided at the bottom of the rotating sleeve (19).

4. A rapid operating condition switching device for protection and commissioning of pumped storage units according to claim 1, characterized in that: The lock seat (6) includes a support plate (15) located on the lower side of the cover plate (3) and parallel to the cover plate (3), and a wedge (16) is provided on the side of the support plate (15) away from the cover plate (3).

5. A rapid operating condition switching device for protection and commissioning of pumped storage units according to claim 1, characterized in that: The cover plate (3) is provided with a slot (21) corresponding to the rotating sleeve (19).

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