Water-turbine generator set with auxiliary excitation device
By designing a mechanical excitation device and an auxiliary power supply system in a hydrowheel generator set, the problem that the traditional excitation device cannot provide sufficient excitation current in the initial start-up period is solved, and a more stable excitation effect and lower energy consumption are achieved.
Patent Information
- Application Number
- CN202421228285.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The traditional hydrowheel generator set excitation device may not be able to provide sufficient excitation current at the beginning of the start-up, resulting in difficulty in starting, slow response speed and high energy consumption, and unable to effectively increase the generator speed, resulting in unstable excitation effect.
A water wheel generator set with mechanical excitation device is designed. By setting up an electric valve and a booster pump, the water flow rate and flow rate are adjusted, and the excitation is achieved by using high-speed water flow to impact the impeller, and additional electrical energy and magnetic field strength are provided through the excitation power supply and magnetic field regulator to ensure stable excitation.
Through mechanical excitation device and auxiliary power supply, the excitation efficiency of the hydrowheel generator set is improved, the problems of difficulty in starting and slow response speed are solved, and more stable excitation effect and lower energy consumption are achieved.
Smart Images
Figure CN222686803U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water turbine generator sets, in particular to a water turbine generator set with an auxiliary excitation device. Background Art
[0002] The hydro-turbine generator set is one of the core equipment of hydropower generation, and its stable operation is directly related to the power generation efficiency and safety of the entire hydropower station. The excitation device is a key equipment in the process of starting and connecting to the grid of the hydro-turbine generator set. The stability and reliability of its performance are crucial to ensure the smooth starting and connecting to the grid of the unit. The traditional hydro-turbine generator set excitation device usually uses a DC power supply for excitation. Although this method is simple and reliable, it also has problems such as difficulty in starting, slow response speed and high energy consumption when in use.
[0003] Since the speed is low and the magnetic field inside the generator is weak at the initial start-up of the unit, the traditional DC excitation method may not be able to provide sufficient excitation current, resulting in difficulty in starting the unit and providing a stable excitation effect. It is impossible to use external mechanical methods, such as increasing the flow rate and speed of the water flow, to increase the speed of the generator to achieve a stable excitation effect, which brings inconvenience to the user. In view of this, we propose a hydro-turbine generator set with an auxiliary excitation device. Utility Model Content
[0004] The utility model aims to provide a hydro-generator set with an auxiliary excitation device to solve the defects mentioned in the above background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A hydro-turbine generator set with an auxiliary excitation device comprises a hydro-turbine generator set body, a mechanical excitation device is arranged on one side of the hydro-turbine generator set body, the mechanical excitation device comprises a rectangular box, a reducer is fixedly mounted on the water outlet end of the rectangular box, a delivery pipe is fixedly mounted on the end of the reducer, an electric valve is fixedly mounted on the delivery pipe, a booster pump is arranged on one side of the delivery pipe, a suction pipe is fixedly mounted on the water inlet end of the booster pump, the end of the suction pipe is fixedly mounted on the rectangular box, a water outlet pipe is fixedly mounted on the water outlet end of the booster pump, and the ends of the delivery pipe and the outlet pipe are both located above the impeller of the hydro-turbine generator set body.
[0007] Preferably, a uniform distribution cylinder is fixedly mounted at the end of the delivery pipe, and the end of the water outlet pipe is fixedly mounted on the uniform distribution cylinder. The bottom of the uniform distribution cylinder is connected to the outside for uniform water outlet operation.
[0008] Preferably, two mutually symmetrical water baffles are fixedly mounted on the water inlet end box body of the rectangular box, and the water baffles are used to converge water toward one side of the rectangular box to make water enter the rectangular box more smoothly.
[0009] Preferably, a flow meter is fixedly mounted on the delivery pipe, and the flow meter is used for flow detection operation.
[0010] Preferably, a battery box is provided on one side of the main body of the hydro-generator set, and an excitation power supply is provided in the battery box, and the excitation power supply is used to provide additional electric energy during the excitation stage.
[0011] Preferably, handles are rotatably connected to the left and right side plates of the battery box via a rotating shaft, and the handles are used for holding operation.
[0012] Preferably, a magnetic field regulator is provided on one side of the battery box, a controller is provided on the magnetic field regulator, and the magnetic field regulator is connected to the excitation winding of the hydro-generator body to adjust the magnetic field strength of the generator inside the hydro-generator body.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] 1. The utility model provides a mechanical excitation device to ensure that when in use, the flow rate of water discharged from the delivery pipe can be adjusted by utilizing the opening and closing degree of the electric valve. In addition, the booster pump is provided to deliver water to the end of the outlet pipe for discharge, thereby improving the water flow rate and flow velocity as a whole, and utilizing the high-speed impact of water on the impeller of the main body of the hydro-turbine generator set to increase the impeller speed, thereby achieving the effect of auxiliary excitation.
[0015] 2. The utility model can provide additional electric energy in the excitation stage by means of the excitation power supply, and can adjust the magnetic field strength of the generator inside the main body of the hydro-generator set by means of the magnetic field regulator, thereby achieving a stable excitation effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 It is a structural schematic diagram of the mechanical excitation device of the utility model;
[0018] Figure 3 It is a partial structural schematic diagram of the utility model;
[0019] Figure 4 It is a cross-sectional view of the uniform distribution cylinder of the utility model.
[0020] The meaning of each number in the figure is:
[0021] 1. The main body of the hydro-generator set;
[0022] 2. Mechanical excitation device; 20. Rectangular box; 21. Water baffle; 22. Reducer; 23. Delivery pipe; 231. Electric valve; 232. Flow meter; 24. Distributor cylinder; 25. Booster pump; 26. Suction pipe; 27. Water outlet pipe;
[0023] 3. Battery box; 30. Excitation power supply; 31. Handle; 32. Magnetic field regulator; 33. Controller. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] See also Figure 1-Figure 4 The utility model provides a technical solution: a hydro-turbine generator set with an auxiliary excitation device, comprising a hydro-turbine generator set body 1, a mechanical excitation device 2 is arranged on one side of the hydro-turbine generator set body 1, the mechanical excitation device 2 comprises a rectangular box 20, a reducer 22 is fixedly installed at the water outlet end of the rectangular box 20, a delivery pipe 23 is fixedly installed at the end of the reducer 22, an electric valve 231 is fixedly installed on the delivery pipe 23, a booster pump 25 is arranged on one side of the delivery pipe 23, a suction pipe 26 is fixedly installed at the water inlet end of the booster pump 25, and a suction pipe 26 is fixedly installed at the water outlet end of the booster pump 25. The end of the suction pipe 26 is fixedly installed on the rectangular box 20, and the water outlet end of the booster pump 25 is fixedly installed with an outlet pipe 27. The ends of the delivery pipe 23 and the outlet pipe 27 are both located above the impeller of the hydro-turbine generator set body 1, ensuring that when in use, the water flow rate can be controlled by controlling the opening and closing degree of the electric valve 231, and then the booster pump 25 works to deliver water, so that the flow rate and flow velocity of water impacting the impeller of the hydro-turbine generator set body 1 are increased, thereby promoting the rapid rotation of the impeller of the hydro-turbine generator set body 1 and realizing stable excitation operation.
[0026] In this embodiment, a uniform distribution cylinder 24 is fixedly mounted at the end of the delivery pipe 23, and the end of the water outlet pipe 27 is fixedly mounted on the uniform distribution cylinder 24. The bottom of the uniform distribution cylinder 24 is connected to the outside for uniform water outlet operation.
[0027] Specifically, two symmetrical water baffles 21 are fixedly installed on the water inlet end of the rectangular box 20. The water baffles 21 are used to gather water toward one side of the rectangular box 20, so that water can enter the rectangular box 20 more smoothly.
[0028] Furthermore, a flow meter 232 is fixedly installed on the delivery pipe 23, and the flow meter 232 is used for flow detection operation.
[0029] In addition, a battery box 3 is provided on one side of the main body 1 of the hydro-turbine generator set, and an excitation power supply 30 is provided in the battery box 3, and the excitation power supply 30 is used to provide additional electric energy during the excitation stage; handles 31 are rotatably connected to the left and right side plates of the battery box 3 through a rotating shaft, and the handles 31 are used for holding operation.
[0030] It is worth noting that a magnetic field regulator 32 is provided on one side of the battery box 3, and a controller 33 is provided on the magnetic field regulator 32. The magnetic field regulator 32 is connected to the excitation winding of the hydro-turbine generator set body 1 and is used to adjust the magnetic field strength of the generator inside the hydro-turbine generator set body 1. The excitation power supply 30 is used to provide additional electrical energy in the excitation stage to quickly establish the magnetic field of the generator set. The excitation power supply can be rechargeable to provide electrical energy when needed; the controller 33 is used to receive operating parameters from the hydro-turbine generator set body 1, and calculate appropriate control signals based on these parameters to drive the magnetic field regulator 32 to work.
[0031] Finally, it should be noted that the components involved in the utility model, such as the magnetic field regulator 32, the excitation power supply 30 and the controller 33, are all universal standard parts or components known to technical personnel in this field, and their structures and principles are all known to technical personnel in this field through technical manuals or through conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adapted controllers and power supplies, are connected through wires. The specific connection means should refer to the working principle of the utility model. The electrical connection between each electrical component is completed in a sequential working order, and the detailed connection means are all well-known technologies in the field.
[0032] When the hydro-turbine generator set with the auxiliary excitation device of the utility model is in use, the uniform distribution cylinder 24 is placed above the impeller of the hydro-turbine generator set body 1, the electric valve 231 is opened, and the water flow in the delivery pipe 23 is adjusted by controlling the opening and closing degree of the electric valve 231. When the electric valve 231 is fully opened and the water flowing out of the delivery pipe 23 impacts the impeller of the hydro-turbine generator set body 1 to cause insufficient excitation operation, the booster pump 25 is connected to an external power supply and made to work. The booster pump 25 works to deliver water, so that the water is discharged from the end of the water outlet pipe 27 at high pressure, and the water is used to impact the impeller of the hydro-turbine generator set body 1 at high speed to perform the excitation operation. In addition, the excitation power supply 30 is used to power the motor of the hydro-turbine generator set body 1 to provide additional electric energy for the excitation operation.
[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A hydro-turbine generator set with an auxiliary excitation device, comprising a hydro-turbine generator set body (1), characterized in that: A mechanical excitation device (2) is provided on one side of the main body (1) of the hydro-turbine generator set. The mechanical excitation device (2) comprises a rectangular box (20). A reducer (22) is fixedly mounted on the water outlet end of the rectangular box (20). A delivery pipe (23) is fixedly mounted on the end of the reducer (22). An electric valve (231) is fixedly mounted on the delivery pipe (23). A booster pump (25) is provided on one side of the delivery pipe (23). A suction pipe (26) is fixedly mounted on the water inlet end of the booster pump (25). The end of the suction pipe (26) is fixedly mounted on the rectangular box (20). A water outlet pipe (27) is fixedly mounted on the water outlet end of the booster pump (25). The ends of the delivery pipe (23) and the outlet pipe (27) are both located above the impeller of the main body (1) of the hydro-turbine generator set.
2. The hydro-generator set with auxiliary excitation device according to claim 1, characterized in that: A uniform distribution cylinder (24) is fixedly mounted at the end of the delivery pipe (23), and the end of the water outlet pipe (27) is fixedly mounted on the uniform distribution cylinder (24). The bottom of the uniform distribution cylinder (24) is in communication with the outside.
3. The hydro-generator set with auxiliary excitation device according to claim 1, characterized in that: Two mutually symmetrical water baffles (21) are fixedly mounted on the water inlet end box body of the rectangular box (20) on the left and right sides, and the water baffles (21) are used to gather water toward one side of the rectangular box (20).
4. The hydro-generator set with auxiliary excitation device according to claim 1, characterized in that: A flow meter (232) is fixedly mounted on the delivery pipe (23), and the flow meter (232) is used for flow detection operation.
5. The hydro-generator set with auxiliary excitation device according to claim 1, characterized in that: A battery box (3) is provided on one side of the main body (1) of the hydro-generator set, and an excitation power supply (30) is provided in the battery box (3). The excitation power supply (30) is used to provide additional electric energy during the excitation stage.
6. The hydro-generator set with auxiliary excitation device according to claim 5, characterized in that: The left and right side plates of the battery box (3) are rotatably connected to handles (31) via a rotating shaft, and the handles (31) are used for holding operation.
7. The hydro-generator set with auxiliary excitation device according to claim 6 is characterized in that: A magnetic field regulator (32) is provided on one side of the battery box (3), a controller (33) is provided on the magnetic field regulator (32), and the magnetic field regulator (32) is connected to the excitation winding of the hydro-generator set body (1) and is used to adjust the magnetic field strength of the generator inside the hydro-generator set body (1).