CN-122013735-A - Combined type pressure regulating well and hydraulic transition process regulating method

Abstract

The invention discloses a combined type pressure regulating well, which is suitable for a water-pumping energy storage power station water-leading power generation system. The invention discloses a method for adjusting a hydraulic transition process, which comprises the steps of changing the water level in a pressure regulating well when pressure fluctuation occurs in a water pipe, driving a rotor to rotate by water at the moment, transmitting torque to an energy storage spring, enabling the water level in the pressure regulating well to reach a fluctuation extremum when deformation resistance of the energy storage spring is balanced with hydraulic driving force, and enabling the water level to start to change reversely, enabling the energy storage spring to release potential energy, driving the rotor to rotate reversely, feeding energy back to water flow and accelerating the water level in the pressure regulating well to return to a stable state. The invention can fundamentally improve the safety guarantee level of the water diversion power generation system and has important significance for promoting the continuous and healthy development of the pumped storage power station.

Inventors

• WANG HUI
• HE NAN
• REN SONGLIN
• CHEN QIN
• CHEN DAN
• YIN XINDI
• GUO SIYUAN
• Nie Zhangbo
• WANG RENZHONG

Assignees

• 黄河勘测规划设计研究院有限公司

Dates

Publication Date

20260512

Application Date

20260226

Claims (8)

1. 1. The composite pressure regulating well is suitable for a water pumping and energy storage power station water diversion power generation system, and is characterized in that the pressure regulating well is arranged right above or obliquely above a water conveying pipeline, the water conveying pipeline is connected with the bottom of the pressure regulating well through an impedance pipe, and a mechanical energy storage pressure regulating device is arranged in the pressure regulating well.
2. 2. The composite pressure regulating well as set forth in claim 1, wherein the mechanical energy storage pressure regulating device comprises a hydraulic driving rotor and an energy storage spring, the hydraulic driving rotor comprises a rotating shaft and blades arranged on the rotating shaft, the rotating shaft is connected with a bracket arranged on a well wall, the energy storage spring is of a plane scroll structure arranged around the rotating shaft, one end of the energy storage spring is fixedly connected with the rotating shaft, and the other end of the energy storage spring is fixedly connected with the well wall.
3. 3. The composite pressure regulating well as set forth in claim 2, wherein the well wall comprises a top spherical section, a middle straight section and a lower conical section which are sequentially connected, the support comprises an upper support arranged at the top of the middle straight section and a lower support arranged at the bottom of the lower conical section, ball bearings positioned at the center of the well wall inner cavity are arranged on the upper support and the lower support, and the rotating shaft is connected with the upper support and the lower support through the ball rotating shaft.
4. 4. The composite pressure regulating well of claim 2, wherein the blades are double helical blades made of high-strength composite material, and the outer edges of the blades are arranged close to the well wall.
5. 5. The method of claim 3, wherein the power spring is disposed on top of the shaft and above the upper support.
6. 6. The composite pressure regulating well as set forth in claim 1, wherein the energy storage spring is at least two, the outer side of the well wall is uniformly provided with a corresponding number of anchoring steel columns, and the outer side end of each energy storage spring is connected with the anchoring steel columns through the well wall.
7. 7. The composite pressure regulating well of claim 1, wherein the water conduit is disposed in a water line or a tail water line.
8. 8. A hydraulic transition process adjusting method is achieved through the combined type pressure regulating well according to any one of claims 1-6, and is characterized in that when pressure fluctuation occurs in a water conveying pipeline, the water level in the pressure regulating well changes, the change of the water level of the pressure regulating well drives a hydraulic driving rotor to rotate, torque is transmitted to an energy storage spring through a rotating shaft, water flow kinetic energy is converted into elastic potential energy to be stored, when deformation resistance of the energy storage spring is balanced with hydraulic driving force, the water level in the pressure regulating well reaches a fluctuation extremum, after that, the water level begins to change reversely, the energy storage spring releases potential energy, the hydraulic driving rotor is driven to rotate reversely, energy is fed back to water flow, and the water level in the pressure regulating well is accelerated to be restored to a stable state.

Description

Combined type pressure regulating well and hydraulic transition process regulating method Technical Field The invention relates to the technical field of water conservancy and hydropower engineering water delivery power generation facilities, in particular to a compound type pressure regulating well suitable for a water pumping and energy storage power station water diversion power generation system and a hydraulic transition process regulating method. Background In recent years, with the increasing prominence of global climate change, the new energy field has come up with unprecedented development opportunities. The pumped storage power station has the advantages of low cost, large electricity storage capacity, flexible power grid dispatching and the like, and meets the peak period of large-scale construction. Along with the continuous expansion of the installation scale of the pumped storage power station, the power station is forward developed to the direction of high water head and long-distance water delivery, so that the control difficulty of the hydraulic transition process is obviously increased. In the operation process of the pumped storage power station, when the load of the power system suddenly changes, the balance between the output of the water turbine and the load of the generator is destroyed, and a severe hydraulic transition process can be generated in the water diversion system. As a key facility for guaranteeing engineering safety, the pressure regulating well plays an irreplaceable role in the process, and adverse effects caused by hydraulic transition are reduced or weakened by effectively regulating water level fluctuation in the system, so that the safe and stable operation of the whole hydraulic system is guaranteed. The existing pressure regulating well mainly comprises a simple type, an impedance type, a differential type and other traditional types, and the working principle of the pressure regulating well mainly depends on the inertial lifting and gravity actions of a water body to consume energy. From the technical point of view, the inertia-gravity pressure regulating system has an optimization space, and from the engineering practice, the traditional pressure regulating well often needs to excavate underground caverns with huge scale in order to ensure enough pressure regulating volume to effectively attenuate fluctuation. With the continuous expansion of the scale of the pressure regulating well, the large-cavity and large-span underground space structure brings a series of challenges to engineering construction, namely the cavity excavation width can reach 20-30 m, the support mode and the excavation cost are extremely high, in order to meet the internal and external air pressure balance requirement, hundreds of meters and even thousands of meters of ventilation safety holes are required to be arranged in a matched mode, the problems of stability of long-term surrounding rock, seepage control and the like of the large-scale underground space are outstanding, the requirement on geological conditions is more severe with the scale increase, and high difficulty, high cost and high risk are brought to engineering construction. Disclosure of Invention In order to solve the problems, the invention provides a novel composite pressure regulating well suitable for a water diversion power generation system of a pumped storage power station, and simultaneously provides a hydraulic transition process regulating method which is suitable for a long-distance large-scale water delivery tunnel system and is used for regulating pressure and water level fluctuation in the hydraulic transition process and guaranteeing stable operation of the water diversion power generation system. The technical scheme can be specifically adopted as follows: The combined type pressure regulating well is suitable for a water pumping and energy storage power station water diversion power generation system, the pressure regulating well is arranged right above or obliquely above a water conveying pipeline, the water conveying pipeline is connected with the bottom of the pressure regulating well through an impedance pipe, and a mechanical energy storage pressure regulating device is arranged in the pressure regulating well. When pressure fluctuation occurs in the water pipe, the water level in the pressure regulating well is changed, and the mechanical energy storage and pressure regulating device is driven to operate by utilizing the water level change in the pressure regulating well, so that the water flow kinetic energy and the mechanical energy can be mutually converted, and stored when the water flow kinetic energy is rich, and meanwhile, the water flow kinetic energy is supplemented through the mechanical energy when the water flow kinetic energy is insufficient, so that the water level in the pressure regulating well is not only prevented from being too high, but also the water flow pressure can be quickly b