CN219527565U

CN219527565U - Distributed residual water power generation system

Info

Publication number: CN219527565U
Application number: CN202320653338.1U
Authority: CN
Inventors: 石东哲
Original assignee: Yolico Electric Wuxi Co ltd
Current assignee: Yolico Electric Wuxi Co ltd
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-08-15
Anticipated expiration: 2033-03-29

Abstract

The utility model relates to the technical field of power generation systems, in particular to a distributed surplus water power generation system which can improve the power generation efficiency of a hydraulic generator and avoid surplus energy waste.

Description

Distributed residual water power generation system

Technical Field

The utility model relates to the technical field of power generation systems, in particular to a distributed residual water power generation system.

Background

The water resource is a substance existing in nature, especially in places where China belongs to mountain plateau, the water resource exists in mountain, and in order to store hydraulic resource, building reservoir and water storage equipment is one of important national policies. Hydroelectric power generation accounts for about 15% of the power resources in China in 2022, grows about 1.5% of the year, and is an important pilot sheep for generating power by renewable resources.

The residual water power generation is to drill holes on a hydropower station water storage dam which is built according to the original design, and power generation is performed by using redundant water resources. The potential energy of the water level is converted into electric energy for energy storage and/or application, so that energy conservation and emission reduction are achieved. Various surplus water power generation devices are generated through water turbines and auxiliary technologies.

The hydraulic turbine is installed in the hydropower station, and is responsible for rotating to enable the engine to generate electricity. The water flow of the upstream water storage reservoir is led into the water turbine through the pipeline to push the impeller to rotate so as to drive the generator to generate electricity, and the water subjected to work is discharged to the downstream through the tail end pipeline. The output of the water turbine is related to the flow Q; the power Po of the engine is related to the rotational speed ω.

The conventional water turbine generates electricity, the output power is not fixed, the output power is required to be determined according to the water storage state or working condition of the reservoir at the time, and the schematic diagram is shown in figure 1. For example, when the water level is high, the water flow passing through the water turbine in unit time is large, the water turbine rotates fast, and the power of the generator is also large; and when the water level is low, the power of the generator is low, and the energy-saving efficiency is low. If the water level is too high and the rotating speed is too high, the generator exceeds the running load, and then part of valves are closed to reduce the flow, so that the residual energy is wasted and cannot be utilized.

Disclosure of Invention

In order to solve the problem of waste of residual energy caused by low power generation efficiency of the existing hydraulic generator, the utility model provides a distributed residual water power generation system which can improve the power generation efficiency of the hydraulic generator and avoid the waste of residual energy.

The technical scheme is as follows: the utility model provides a distributed surplus water power generation system, its includes the upper reaches reservoir, the water turbine is connected through the pipeline to the upper reaches reservoir, impeller exit linkage catch basin on the water turbine, the energy storage electric capacity is connected to the generator on the water turbine, the electric power network power is connected through energy feedback unit to the energy storage electric capacity, a serial communication port, the pipeline divide into parallelly connected three routes and forms three routes independent power generation system, every way power generation system includes the pipeline, the import of three-way pipe is connected to the pipeline, control pipeline is connected to one export of three-way pipe, another export connection bypass pipeline, be provided with first stop valve, first flow indicator, first proportion control valve on the pipeline, be provided with second stop valve, second flow indicator, second proportion control valve on the control pipeline, be provided with the third stop valve on the bypass pipeline.

The three-way pipe is further characterized in that the three-way pipe is a Y-shaped three-way pipe.

After the utility model is adopted, three parallel pipelines are arranged between the upstream water storage reservoir and the water turbine, namely three groups of power generation systems exist, the power generation efficiency of water flow is firstly decomposed, then electric energy is concentrated, the energy feedback unit is used for feeding back the power grid uniformly, the power generation energy saving efficiency can reach 93 percent or so, compared with the power generation efficiency of 67-87 percent of the traditional water turbine, the utility model has obvious effect, the flow in an upper pipeline and a control pipeline can be monitored manually according to the first flow indicator and the second flow indicator, the flow is regulated by regulating the proportional control valve, and excessive waste of residual energy is avoided.

Drawings

FIG. 1 is a schematic diagram of the prior art;

FIG. 2 is a schematic diagram of the structure of the present utility model;

fig. 3 is a schematic diagram of a three-way power generation system.

Detailed Description

Referring to fig. 2 and 3, a distributed surplus water power generation system is shown, which comprises an upstream water storage reservoir 1, wherein the upstream water storage reservoir 1 is connected with a water turbine 2 through a pipeline, an impeller outlet on the water turbine 2 is connected with a water collecting tank 3, a generator 4 on the water turbine 2 is connected with an energy storage capacitor 5, the energy storage capacitor 5 is connected with a power grid power supply 7 through an energy feedback unit 6 and an LLC filter 21, the pipeline is divided into three parallel paths to form three independent power generation systems 8, each power generation system 8 comprises an upper pipeline 9, the upper pipeline 9 is connected with an inlet of a three-way pipe 10, one outlet of the three-way pipe 10 is connected with a control pipeline 11, the other outlet of the three-way pipe 10 is connected with a bypass pipeline 12, a first stop valve 13, a first flow indicator 14 and a first proportional control valve 15 are arranged on the upper pipeline 9, a second stop valve 16, a second flow indicator 17 and a second proportional control valve 18 are arranged on the control pipeline 11, and a third stop valve 19 is arranged on the bypass pipeline 12.

The first flow indicator 14 and the second flow indicator 17 are used for respectively monitoring the flow in the upper pipeline 9 and the control pipeline 11, when the flow is too large or too small, the opening amount can be properly adjusted, the flow in the control pipeline 11 is mainly used as the main flow, the upper pipeline 9 is used as the auxiliary flow, if the flow is too large, the opening amount of the second proportional control valve 18 becomes small, the redundant flow passes through the bypass pipeline 12, the water flow entering the water turbine becomes small, and when the flow is too small, the opening amount of the second proportional control valve 18 becomes large, the flow flowing through the control pipeline 11 becomes large, and the water flow entering the water turbine becomes large. When the second proportional control valve 18 alone cannot achieve a good effect, the first proportional control valve 15 may be appropriately adjusted to control the total intake flow.

The three-way pipe is selected by adopting a Y-shaped 120 DEG as far as possible. Compared with the Y type, the main T-shaped water flow resistance is larger, and energy consumption is not generated in the process of potential energy conversion, and particularly, the main T-shaped water flow resistance is more obvious under the condition that the flow resistance is in direct proportion to the flow velocity.

A hydro-generator comprising an impeller and a generator. The generator structure is a stator and a rotor, the rotor or the motor preferably being permanent magnet. The type of the water turbine is preferably impact type, and the consumption of kinetic energy to electric energy is small because the pressure of the process water flow is kept unchanged, and the efficiency can reach more than 95%.

And the energy storage capacitor is preferably a film capacitor. The voltage withstand is superior to that of an electrolytic capacitor, the voltage division parallel connection is not needed, and the electric ripple parameter is also superior to that of the electrolytic capacitor, so that the energy storage device is suitable for being used in comparison. In the implementation of the energy storage device, the specific number of the direct current busbar (+) (-) and the electrical specification of the contact point need to be matched with the distributed number and the power.

And the energy feedback unit is directly connected with the energy storage capacitor in parallel at the direct current side, and in the specific implementation of an alternating current output power grid, the power grid harmonic wave and inhibition are considered, LLC and LCL filters or an AFE harmonic wave treatment module are necessarily additionally arranged, so that the influence of harmonic waves generated in the power grid entering process on other electrical equipment is avoided. The power of the energy feedback unit needs to consider the total power of the distributed system when the distributed system is fully charged, and the power required by the total power generation equipment at 110-120% load is generally designed.

The generator may also be connected to a frequency converter 20.

When the water turbine rotates, the generator works, a rotating magnetic field is output through the frequency converter, the frequency converter and the permanent magnet are reversely cut, the generator runs in a four-quadrant power generation state, generated electric energy directly enters the storage capacitor, the electric energy attribute is direct current, the direct current passes through the energy feedback unit, and the IGBT and the control circuit in the energy feedback unit convert the direct current into 380V/50Hz constant-voltage constant-frequency alternating current and enter the power grid.

Claims

1. The utility model provides a distributed surplus water power generation system, its includes the upper reaches reservoir, the water turbine is connected through the pipeline to the upper reaches reservoir, impeller exit linkage catch basin on the water turbine, the energy storage electric capacity is connected to the generator on the water turbine, the electric power network power is connected through energy feedback unit to the energy storage electric capacity, a serial communication port, the pipeline divide into parallelly connected three routes and forms three routes independent power generation system, every way power generation system includes the pipeline, the import of three-way pipe is connected to the pipeline, control pipeline is connected to one export of three-way pipe, another export connection bypass pipeline, be provided with first stop valve, first flow indicator, first proportion control valve on the pipeline, be provided with second stop valve, second flow indicator, second proportion control valve on the control pipeline, be provided with the third stop valve on the bypass pipeline.

2. The distributed surplus water power generation system of claim 1, wherein the tee is a Y-tee.