High-potential equipment power supply system based on oil flow power generation effect

Abstract

The invention belongs to the technical field of power transmission, and particularly relates to a high-potential equipment power supply system based on an oil flow power generation effect. An existing power supply mode is poor in safety and stability, large in occupied space and high in cost. The invention provides a high-potential equipment power supply system based on an oil flow power generation effect, which comprises a driving mechanism, a power transmission mechanism and a generator which are connected in sequence, the generator is connected with an electric appliance, and the power transmission mechanism comprises an oil flow generation assembly and a power conversion assembly which are connected with each other. The oil flow generation assembly is connected with the driving mechanism, and the power conversion assembly is connected with the generator. A safe, reliable, stable-operation, space-saving and cost-saving power supply mode is provided for a motor driving system at a high potential.

Description

Technical Field

[0001] This application belongs to the field of power transmission technology, and in particular relates to a high-potential equipment power supply system based on the oil flow power generation effect. Background Technology

[0002] Currently, the transmission of clean energy from western China to urban load centers and the large-scale export of offshore wind power require ultra-high voltage direct current (UHVDC) technology. However, the sending end faces extremely complex transmission corridor scenarios such as snow-capped mountain passes and high-altitude, frigid regions, while the receiving end faces the near-saturation of transmission corridors around megacities and load centers. Gas-insulated metal-enclosed transmission lines (GILs) and gas-insulated switchgear (GIS) offer advantages such as large transmission capacity, low losses, and minimal environmental impact, making them ideal solutions to these problems. To date, there is limited operational experience with high-voltage direct current gas-insulated systems, and challenges related to interface characteristics, insulation design, and operational reliability remain to be overcome. This necessitates long-term testing of equipment prototypes to demonstrate their long-term performance.

[0003] The continuous accumulation of charge at the gas-solid interface of an insulator under DC voltage significantly affects its surface insulation properties. To obtain its saturation time and evolution, an active electrostatic voltage probe is typically used for measurement. During the measurement, the probe itself maintains the same potential as the measurement location, which can be as high as hundreds of kilovolts. Simultaneously, to ensure measurement accuracy, a motor must control the probe's measuring surface to remain parallel to the insulator surface at all times. Furthermore, to ensure safe operation of the motor, it must maintain equipotential with the probe. This means that conventional power supply methods (direct connection to the grid using 220V AC / 24V DC power) cannot be used for driving.

[0004] Existing power supply methods are lacking in safety and stability, and also occupy a large space and are costly. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] Given that existing power supply methods are lacking in safety and stability, and also suffer from problems such as large space occupation and high cost, this application provides a high-potential equipment power supply system based on the oil flow power generation effect.

[0007] 2. Technical Solution

[0008] To achieve the above objectives, this application provides a high-potential equipment power supply system based on the oil flow power generation effect, including a drive mechanism, a power transmission mechanism, and a generator connected in sequence. The generator is connected to an electrical appliance. The power transmission mechanism includes an oil flow generating component and a power conversion component connected to each other. The oil flow generating component is connected to the drive mechanism, and the power conversion component is connected to the generator.

[0009] Another embodiment provided in this application includes a housing, in which the power conversion component, the generator, and the rectifier circuit are disposed.

[0010] Another embodiment provided in this application is that the driving mechanism is an electric motor, an AC generator, or a DC generator.

[0011] Another embodiment provided in this application is as follows: the oil flow generating component is a hydraulic pump or an oil pump, the power conversion component is a hydraulic motor or a water turbine generator, and the electric motor, the hydraulic pump, the hydraulic motor are connected to the generator or the electric motor, the oil pump, the water turbine generator are connected to the generator.

[0012] Another embodiment provided in this application is as follows: the hydraulic pump and the hydraulic motor are connected through a hydraulic oil pipe assembly, the hydraulic oil pipe assembly includes an oil inlet pipe and an oil outlet pipe, the hydraulic motor, the oil inlet pipe and the hydraulic pump are connected in sequence, and the hydraulic motor, the oil outlet pipe and the hydraulic pump are connected in sequence.

[0013] Another embodiment provided in this application is that the generator is connected to the electrical appliance through a rectifier circuit.

[0014] Another embodiment provided in this application is as follows: the electrical appliance includes a probe driving assembly, and the rectifier circuit, the probe driving assembly and the probe are connected in sequence.

[0015] Another embodiment provided in this application is that the probe tip is parallel to the surface of the basin insulator.

[0016] Another embodiment provided in this application is as follows: the basin-type insulator includes a grounded outer shell, both the outer shell and the electrical appliance are disposed inside the grounded outer shell, the grounded outer shell is provided with an interface, the oil inlet pipe passes through the grounded outer shell through the interface, and the oil outlet pipe passes through the grounded outer shell through the interface.

[0017] Another embodiment provided in this application is that the motor is connected to 380V / 220V AC power.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the beneficial effects of the high-potential equipment power supply system based on the oil flow power generation effect provided in this application are as follows:

[0020] The high-potential equipment power supply system based on the oil flow power generation effect provided in this application offers a new power supply method that can be superimposed on a high potential (probe potential). This application uses an equipotential motor to drive the probe movement, uses oil flow power generation, and achieves electrical insulation between high and low voltage equipment.

[0021] The high-potential equipment power supply system based on the oil flow power generation effect provided in this application offers a safe, reliable, stable, space-saving, and cost-effective power supply method for motor drive systems operating at high potentials.

[0022] The high-potential device power supply system based on the oil flow power generation effect provided in this application, in order to achieve a stable and continuous power supply to the high-potential motor, uses an external generator to drive a hydraulic pump to generate oil flow, which in turn drives a hydraulic motor to rotate, thereby driving an internal generator to output electrical energy. The rectified current is then output as 24V DC power to supply power to the motor driving the probe at the high potential. The high potential of the probe is insulated from ground by the hydraulic oil. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the motor drive system of this application;

[0024] Figure 2 This is a schematic diagram of the motor drive system structure of this application. Detailed Implementation

[0025] In the following, specific embodiments of this application will be described in detail with reference to the accompanying drawings. Based on these detailed descriptions, those skilled in the art will be able to clearly understand and implement this application. Without departing from the principles of this application, features from various embodiments can be combined to obtain new implementations, or certain features from some embodiments can be substituted to obtain other preferred implementations.

[0026] Existing methods involve attaching the probe to an insulating rod and controlling its movement via a motor. This relies on increasing the insulation distance for safe probe movement. However, this results in a very large space required for probe movement, making it unsuitable for measurements in enclosed spaces like GIL and GIS insulators. Furthermore, the long insulating rod causes significant probe swaying during movement, hindering accurate measurement positioning. Another method utilizes capacitors for power transmission, using multiple capacitors and resistors in parallel to divide the voltage and transmit alternating current. At higher potentials, a transformer and rectifier convert the AC energy into DC power to power the motor. However, as the measurement position changes, the reference potential of the probe and drive motor also changes, requiring adjustment of the number of capacitor and resistor stages in the parallel circuit. This lack of continuous dynamic adjustment fails to meet measurement requirements. Moreover, higher voltage levels necessitate an increased number of capacitor and resistor stages, significantly increasing the equipment size. Battery-powered motor drives in DC gas-insulated (GIS / GIL) systems suffer from several drawbacks. The charge buildup time on the insulator surface is typically thousands of hours, and the probes are inserted into the GIS / GIL cavity, preventing battery replacement mid-operation. Therefore, this method cannot meet the requirements for long-term continuous operation. Fuel generators provide power via fuel delivery pipelines, but excessively high voltage levels pose safety hazards. Optical fiber transmission powers solar cells to drive the motor. However, due to the low conversion efficiency of solar cells, large solar cells are required for high-power motors. Multi-stage isolation transformers transmit power, which is then rectified to power the motor. Higher voltage levels drastically increase the number of isolation transformer stages, leading to a significant increase in space requirements and equipment costs.

[0027] See Figures 1-2 This application provides a high-potential equipment power supply system based on the oil flow power generation effect, including a drive mechanism, a power transmission mechanism and a generator 8 connected in sequence. The generator 8 is connected to an electrical appliance. The power transmission mechanism includes an oil flow generating component and a power conversion component connected to each other. The oil flow generating component is connected to the drive mechanism and the power conversion component is connected to the generator 8.

[0028] To supply power to appliances at a high potential, an external power source first provides electrical energy to the drive mechanism, driving it to rotate and converting the electrical energy into rotational mechanical energy. The rotational mechanical energy is then converted into the kinetic energy of high-pressure, high-speed hydraulic oil via an oil flow generating component. This kinetic energy is then transported through hydraulic oil pipelines to the high-potential power conversion component, where hydraulic oil provides electrical insulation between the low-potential oil flow generating component and the high-potential power conversion component. The power conversion component then converts the kinetic energy of the high-pressure, high-speed hydraulic oil into its own rotational mechanical energy. Finally, by connecting the output shaft of the power conversion component to the rotor of generator 8, generator 8 converts the rotational mechanical energy of the power conversion component into electrical energy, which is then output as a stable 24V DC power supply to the appliances via a rectifier circuit.

[0029] Furthermore, it also includes a housing 7, within which the power conversion component, the generator, and the rectifier circuit are housed. The housing 7 is an equipotential housing, a type of metal casing. The generator 8 and the power conversion component are always kept at the same potential as the electrical appliances, whose voltage may reach hundreds of kilovolts. To prevent electric field distortion caused by irregular surfaces from triggering gas discharge and interfering with the electrical appliances, the equipotential housing 7 is used to shield them, thus preventing electric field distortion and gas discharge caused by irregular surfaces.

[0030] Furthermore, the drive mechanism is an electric motor 1, an AC generator, or a DC generator. The drive mechanism in this application can be any power source.

[0031] Furthermore, the oil flow generating component is a hydraulic pump 2 or an oil pump, the power conversion component is a hydraulic motor 6 or a water turbine generator, and the electric motor 1, the hydraulic pump 2, the hydraulic motor 6 are connected to the generator 8, or the electric motor, the oil pump, the water turbine generator are connected to the generator 8.

[0032] To supply energy to the electrical appliance at a high potential, firstly, an external AC 220V power supply provides electrical energy to the motor 1, driving the motor 1 to rotate and converting electrical energy into rotational mechanical energy. The hydraulic pump 2 then converts this rotational mechanical energy into the kinetic energy of high-pressure, high-speed flowing hydraulic oil, which is then transported through hydraulic oil pipelines to the high-potential hydraulic motor 6. Here, the hydraulic oil provides electrical insulation between the ground-potential hydraulic pump 2 and the high-potential hydraulic motor 6. The hydraulic motor 6 converts the kinetic energy of the high-pressure, high-speed flowing hydraulic oil into its own rotational mechanical energy. Finally, by connecting the output shaft of the hydraulic motor 6 to the rotor of the generator 8, the generator 8 converts the rotational mechanical energy of the hydraulic motor into electrical energy, which is then output as a stable 24V DC power supply through a rectifier circuit to power the electrical appliance.

[0033] Furthermore, the hydraulic pump 2 and the hydraulic motor 6 are connected via a hydraulic oil pipe assembly, which includes an inlet pipe 3 and an outlet pipe 4. The hydraulic motor 6, the inlet pipe 3, and the hydraulic pump 2 are connected in sequence, as are the hydraulic motor 6, the outlet pipe 4, and the hydraulic pump 2.

[0034] By connecting the motor 1 to 380V / 220V AC power, it is powered on and rotated, which in turn drives the hydraulic oil pump 2 to rotate, driving the internal hydraulic oil to flow. The hydraulic oil enters the hydraulic motor 6 through the oil inlet pipe 3, driving the hydraulic motor 6 to rotate. Then the hydraulic oil flows back to the hydraulic pump 2 through the oil outlet pipe 4 of the hydraulic motor 6.

[0035] Furthermore, the generator 8 is connected to the electrical appliance via a rectifier circuit 9.

[0036] Furthermore, the electrical appliance includes a probe driving assembly, and the rectifier circuit 9, the probe driving assembly, and the probe 12 are connected in sequence.

[0037] Furthermore, the end of the probe 12 is parallel to the surface of the basin insulator 13.

[0038] Hydraulic oil drives the hydraulic motor 6 to rotate, which in turn drives the generator 8 to rotate, outputting electrical energy. The output electrical energy is then rectified by the rectifier circuit 9 at the tail of the generator 8 to output a stable 24V DC power. This power is supplied to the motor and driver 11 that control the probe's movement via the probe lead 10, thereby enabling the probe 12 to rotate. This ensures that the tip of the probe 12 remains parallel to the surface of the basin-type insulator 13 when measuring different positions of the insulator 13. The probe lead 10 includes an insulating layer, rectifier circuit output leads, and internal probe measurement leads.

[0039] Furthermore, the basin-type insulator 13 includes a grounding housing 14, the housing 7 and the electrical appliance are both disposed inside the grounding housing 14, the grounding housing 14 is provided with an interface 5, the oil inlet pipe 3 passes through the grounding housing 14 through the interface 5, and the oil outlet pipe 4 passes through the grounding housing 14 through the interface 5.

[0040] The oil inlet pipe 3 and oil outlet pipe 4 of the hydraulic motor 6 pass through the housing 14 of the gas insulation system via the interface 5, ensuring the airtightness of the gas insulation equipment. The housing 14 is grounded, and the equalizing ball 16 at the end of the high-voltage guide rod applies the normal operating voltage. Different voltages will be generated at different positions on the surface of the insulator 13, and the voltage of the probe 12 will remain the same as the voltage on the surface of the insulator at its directly opposite position. When the position of the probe 12 changes, since the radial profile of the insulation 13 is not a straight line, the probe 12 needs to be readjusted to be parallel to the surface of the insulation 13 via the motor and driver 11. At the same time, in order to ensure the continuity of measurement, the high-voltage guide rod 15 will continuously maintain DC high voltage during this process, so the probe 12 will always maintain a high voltage.

[0041] For the safe operation of the motor and driver 11, the probe 12, the motor and driver 11, the probe lead 10, the rectifier circuit 9, the generator 8, the equipotential housing 7, and the hydraulic motor 6 must always maintain equipotentiality.

[0042] The rectifier circuit 9, generator 8, and hydraulic motor 6 are always kept at the same potential as the probe 12, and their voltage may be as high as hundreds of kilovolts. In order to avoid the electric field distortion caused by their irregular surface, which may lead to gas discharge and interfere with the measurement accuracy of the probe 11, an equipotential shell 7 is used to shield them to prevent the electric field distortion caused by their irregular surface from leading to gas discharge.

[0043] This application uses oil (any flowable insulating liquid medium, mainly insulating oil) as the transmission medium, which transmits energy while achieving electrical insulation between high and low voltage; it avoids the problems of high cost, large space occupation and low safety factor associated with other methods (multi-stage capacitor and resistor parallel connection, fuel transportation, multi-stage isolation transformer) for high and low voltage side energy transmission.

[0044] This application uses an equipotential motor to drive the probe movement, instead of using an insulating rod to insulate the probe from the motor, which greatly reduces the space occupied and improves the flexibility of probe movement.

[0045] This application can supply power to motor drivers that are at high potentials, but is not limited to motor drivers. It can be used to power all devices that are at high potentials (including electro-optic probes, electric field probes, temperature probes, and a series of other electrical devices such as sensors that need to operate in high-voltage environments).

[0046] Although this application has been described above with reference to specific embodiments, those skilled in the art will understand that many modifications can be made to the configurations and details disclosed in this application within the principles and scope of the disclosure. The scope of protection of this application is determined by the appended claims, and the claims are intended to cover all modifications included in the literal meaning or scope of equivalents of the technical features in the claims.

Claims

1. A high-potential equipment power supply system based on the oil flow power generation effect, characterized in that: It includes a drive mechanism, a power transmission mechanism, and a generator connected in sequence. The generator is connected to an electrical appliance. The power transmission mechanism includes an oil flow generating component and a power conversion component connected to each other. The oil flow generating component is connected to the drive mechanism, and the power conversion component is connected to the generator.

2. The high-potential equipment power supply system based on the oil flow power generation effect as described in claim 1, characterized in that: It also includes a housing, within which the power conversion assembly, the generator, and the rectifier circuit are housed.

3. The high-potential equipment power supply system based on the oil flow power generation effect as described in claim 2, characterized in that: The drive mechanism is an electric motor, an AC generator, or a DC generator.

4. The high-potential equipment power supply system based on the oil flow power generation effect as described in claim 3, characterized in that: The oil flow generating component is a hydraulic pump or an oil pump, and the power conversion component is a hydraulic motor or a water turbine generator. The electric motor, the hydraulic pump, the hydraulic motor are connected to the generator, or the electric motor, the oil pump, the water turbine generator are connected to the generator.

5. The high-potential equipment power supply system based on the oil flow power generation effect as described in claim 5, characterized in that: The hydraulic pump and the hydraulic motor are connected via a hydraulic oil pipe assembly, which includes an inlet pipe and an outlet pipe. The hydraulic motor, the inlet pipe, and the hydraulic pump are connected in sequence, as are the hydraulic motor and the outlet pipe.

6. The high-potential equipment power supply system based on the oil flow power generation effect as described in claim 5, characterized in that: The generator is connected to the electrical appliance via a rectifier circuit.

7. The high-potential equipment power supply system based on the oil flow power generation effect as described in claim 6, characterized in that: The electrical appliance includes a probe driving assembly, and the rectifier circuit, the probe driving assembly, and the probe are connected in sequence.

8. The high-potential equipment power supply system based on the oil flow power generation effect as described in claim 7, characterized in that: The probe tip is parallel to the surface of the basin insulator.

9. The high-potential equipment power supply system based on the oil flow power generation effect as described in claim 8, characterized in that: The basin-type insulator includes a grounded outer shell, and both the outer shell and the electrical appliance are disposed inside the grounded outer shell. The grounded outer shell is provided with an interface, through which the oil inlet pipe passes through the grounded outer shell and the oil outlet pipe passes through the grounded outer shell.

10. The high-potential equipment power supply system based on the oil flow power generation effect as described in any one of claims 3 to 9, characterized in that: The motor is connected to 380V / 220V AC power.

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