Small hydro power generation method using inter-shaft connection control and system thereof

Abstract

Embodiments relate to a small hydro power generation system using inter-shaft connection control, the small hydro power generation system including: a turbine unit configured to rotate due to discharged water; a turbine shaft connected to the turbine unit and configured to rotate together with the turbine unit; a generator shaft engaged with a portion of the turbine shaft and configured to rotate together with the turbine shaft; a generator module connected to the generator shaft and configured to generate power in accordance with rotation of the generator shaft; an ESS module configured to store some of power generated by the generator module; a sensing module configured to measure the rotation speed and the rotation phase of the turbine shaft and the generator shaft in real time; and a PMS module configured to analyze data on the rotation speed and the rotation phase measured by the sensing module and control the driving of the generator shaft using the power stored in the ESS module according to a preconfigured analysis result.

Description

Method and system for small hydropower generation using inter-axle connection control

[0001] Embodiments of the present invention relate to a method and system for generating small hydropower using inter-axle connection control.

[0002]

[0003] Micro-hydropower refers to small-scale hydroelectric power plants with a capacity of less than 15,000 kW. However, in Korea, it is commonly referred to as micro-hydropower plants, meaning those with capacities of less than 10,000 kW. While micro-hydropower plants operate in a similar principle to large-scale hydropower plants, they are known to generate cleaner energy with less pollution than large-scale hydropower plants.

[0004] Small hydropower plants are being effectively installed in various locations. For example, small hydropower plants utilizing treated effluent from sewage treatment plants, fish farms, and other sources can save initial investment by virtually eliminating the civil engineering costs required for dam construction in rivers. This makes them more economical than power generation from rivers. Furthermore, stable flow rates ensure high-efficiency power generation, and power generation can nearly double that of rivers.

[0005] As illustrated in Fig. 1, a typical small hydropower generation system (10) may be composed of a turbine (1) that rotates by the potential energy of discharged water, a generator (2) that converts the rotational kinetic energy of the turbine (1) into electrical energy to generate power, an ESS (Energy Storage System) (3) that stores a portion of the power generated by the generator (2), a distribution panel (4), etc.

[0006] In this regard, Korean Patent Publication No. 10-1667036 discloses a torque control device for a small hydroelectric power plant, which is a device for controlling a generator of a small hydroelectric power plant in which a driving torque is set according to an average inflow rate, wherein a control means controls the torque of the generator in accordance with the rotational speed of the generator detected by an encoder that is installed on a rotational shaft of the generator that rotates by a water turbine and detects the rotational speed of the rotational shaft of the generator, wherein the control means detects the rotational speed of the rotational shaft by counting pulses of an encoder that outputs the rotational speed of the generator rotational shaft in the form of pulses, which changes according to the inflow rate supplied to the water turbine, and compares the detected rotational speed with a preset reference rotational speed, and controls the driving of the water turbine according to a rate at which the detected rotational speed is reduced, thereby proportionally controlling the driving torque of the generator.

[0007]

[0008] The purpose of embodiments of the present invention is to provide a method and system for small hydro power generation utilizing shaft-to-shaft connection control that can easily maximize the efficiency of small hydro power generation even when discharge amount fluctuates through control of the connection between a turbine shaft and a generator shaft.

[0009] In addition, embodiments of the present invention aim to provide a method and system for small hydro power generation utilizing shaft connection control that can minimize small hydro power generation reactive power while improving the power generation operation rate by charging the regenerative braking energy of the generator shaft to an ESS module and discharging the charged power to generate rotational electromotive force of the generator shaft while controlling the separation and connection between shafts in real time.

[0010] The technical tasks to be achieved in the embodiments are not limited to those mentioned above, and other technical tasks not mentioned can be considered by a person having ordinary skill in the art from the various embodiments described below.

[0011]

[0012] According to embodiments, a small hydro power generation system utilizing shaft-to-shaft connection control may include: a turbine unit configured to rotate by effluent; a turbine shaft connected to the turbine unit and configured to rotate together; a generator shaft configured to mesh with a portion of the turbine shaft and rotate together; a generator module connected to the generator shaft and configured to generate power according to rotation of the generator shaft; an ESS module configured to store a portion of power generated by the generator module; a sensing module configured to measure rotational speeds and rotational phases of the turbine shaft and the generator shaft in real time; and a PMS module configured to analyze data on rotational speeds and rotational phases measured by the sensing module and control driving of the generator shaft with power stored in the ESS module according to a preset analysis result.

[0013] In addition, according to embodiments, the PMS module may include a rating determination unit configured to determine whether the generator shaft has reached the rated rotation speed by comparing the real-time rotation speed of the turbine shaft with a preset reference rotation speed; and a shaft drive control unit configured to drive the generator shaft at the rated rotation speed using power stored in the ESS module when the generator shaft has not reached the rated rotation speed.

[0014] In addition, according to embodiments, the turbine shaft and the generator shaft are configured to interlock or separate from each other according to the control of the PMS module to determine whether power is transmitted, and the PMS module further includes a shaft separation control unit configured to separate the turbine shaft and the generator shaft from each other to block power transmission when the generator shaft enters a rated rotation speed and the rotation speed of the turbine shaft decreases within a preset numerical range, and the generator module may be further configured to charge regenerative braking energy of the generator shaft generated in a state where the power transmission is blocked to the ESS module according to the control of the PMS module.

[0015] In addition, according to embodiments, the shaft drive control unit may control the rotational speed and rotational phase of the generator shaft to correspond to the rotational speed and rotational phase of the turbine shaft with the power charged in the ESS module when the generator shaft enters the rated rotational speed and the rotational speed of the turbine shaft increases within a preset numerical range, and the shaft separation and coupling control unit may control the turbine shaft and the generator shaft, which are in a mutually separated state, to be mutually connected to enable power transmission when the rotational speeds and rotational phases of the turbine shaft and the generator shaft correspond to each other.

[0016] In addition, according to embodiments, the shaft separation control unit may be additionally configured to block power transmission by separating the turbine shaft and the generator shaft from each other when the rated rotation speed of the generator shaft is not reached.

[0017] In addition, according to embodiments, a method for small hydro power generation using shaft-to-shaft connection control implemented by a small hydro power generation system using shaft-to-shaft connection control may include: a step of determining whether the generator shaft enters the rated rotation speed by comparing the real-time rotation speed of the turbine shaft with a preset reference rotation speed; a step of, when the generator shaft enters the rated rotation speed and the rotation speed of the turbine shaft decreases within a preset numerical range, separating the turbine shaft and the generator shaft from each other to block power transmission, and charging the regenerative braking energy of the generator shaft generated in the state where the power transmission is blocked to the ESS module according to the control of the PMS module; and a step of, when the generator shaft does not enter the rated rotation speed, separating the turbine shaft and the generator shaft from each other to block power transmission, and driving the generator shaft at the rated rotation speed with power stored in the ESS module.

[0018]

[0019] A method and system for small hydropower generation utilizing shaft-to-shaft connection control according to one embodiment of the present invention can easily maximize the efficiency of small hydropower generation even when the discharge amount fluctuates through connection control between a turbine shaft and a generator shaft.

[0020] In addition, the micro-hydro power generation method and system utilizing shaft-to-shaft connection control according to one embodiment of the present invention can minimize micro-hydro power generation reactive power while improving the power generation operation rate by controlling shaft-to-shaft separation and connection in real time while charging the regenerative braking energy of the generator shaft to the ESS module and discharging the charged power to use it for generating rotational electromotive force of the generator shaft.

[0021] The effects that can be obtained from the examples are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly derived and understood by a person having ordinary skill in the art based on the detailed description below.

[0022]

[0023] The accompanying drawings, which are included as part of the detailed description to aid understanding of the embodiments, provide various embodiments and, together with the detailed description, describe technical features of the various embodiments.

[0024] Figure 1 schematically illustrates a conventional general small hydropower generation system.

[0025] Figure 2 schematically illustrates a small hydropower generation system utilizing inter-axis connection control according to one embodiment of the present invention.

[0026] Figures 3 and 4 are schematic operation diagrams each showing a connection state between a turbine shaft and a generator shaft according to one embodiment of the present invention.

[0027] FIG. 5 is a block diagram schematically illustrating a small hydropower generation system utilizing inter-axis connection control according to one embodiment of the present invention.

[0028] Figure 6 is a block diagram schematically showing each configuration of a PMS module according to one embodiment of the present invention.

[0029]

[0030] The following embodiments combine components and features of the embodiments in a predetermined form. Each component or feature may be considered optional unless explicitly stated otherwise. Each component or feature may be implemented without being combined with other components or features. Furthermore, various embodiments may be formed by combining some components and / or features. The order of operations described in various embodiments may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.

[0031] In the description of the drawings, procedures or steps that may obscure the gist of various embodiments are not described, and procedures or steps that can be understood by a person with ordinary skill in the art are also not described.

[0032] Throughout the specification, when a part is said to "comprising" (or including) a certain component, this does not mean that other components are excluded, but rather that other components can be included, unless specifically stated otherwise. In addition, terms such as "...part," "...unit," and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software. In addition, the words "a" or "an," "one," "the," and similar related words may be used in the singular and plural sense in the context of describing various embodiments (especially in the context of the claims below) unless otherwise indicated herein or clearly contradicted by context.

[0033] Hereinafter, embodiments according to various embodiments will be described in detail with reference to the attached drawings. The detailed description disclosed below, together with the attached drawings, is intended to explain exemplary embodiments of various embodiments and is not intended to represent the only embodiment.

[0034] Additionally, specific terms used in various embodiments are provided to aid understanding of the various embodiments, and the use of such specific terms may be changed in other forms without departing from the technical spirit of the various embodiments.

[0035]

[0036] Fig. 2 is a schematic diagram of a small hydro power generation system (1000) utilizing shaft-to-shaft connection control according to one embodiment of the present invention. Figs. 3 and 4 are operation example diagrams each schematically showing the connection state between a turbine shaft (200) and a generator shaft (300) according to one embodiment of the present invention. Fig. 5 is a block diagram schematically showing a small hydro power generation system (1000) utilizing shaft-to-shaft connection control according to one embodiment of the present invention. Fig. 6 is a block diagram schematically showing each component of a PMS module (600) according to one embodiment of the present invention.

[0037]

[0038] Referring to FIGS. 2 and 5, a small hydro power generation system (1000) utilizing shaft-to-shaft connection control according to one embodiment of the present invention comprises: a turbine unit (100) configured to rotate by effluent; a turbine shaft (200) connected to the turbine unit (100) and configured to rotate together; a generator shaft (300) configured to rotate together while engaging with a portion of the turbine shaft (200); a generator module (400) connected to the generator shaft (300) and configured to generate power according to the rotation of the generator shaft (300); an ESS (Energy Storage System) module (500) configured to store a portion of the power generated by the generator module (400); a sensing module (700) configured to measure the rotational speed and rotational phase of the turbine shaft (200) and the generator shaft (300) in real time; and a sensing module (700) configured to analyze data on the rotational speed and rotational phase measured by the sensing module (700), and to generate power from the power stored in the ESS module (500) according to a preset analysis result. It may include a PMS (Power Management System) module (600) configured to control the operation of the axis (300).

[0039] First, the turbine unit (100) according to one embodiment of the present invention can be installed in a pipe through which effluent passes, and can be configured to rotate according to the progress of the effluent. For example, the turbine unit (100) according to one embodiment of the present invention can be configured with a plurality of turbine blades (110) having a curved shape and a wheel-shaped turbine (120) that is linked to and rotates together with the turbine blades (110). However, the turbine unit (100) according to one embodiment of the present invention being configured with the turbine blades (110) and the turbine (120) is merely an example for easy understanding of the present invention, and it goes without saying that the turbine unit (100) can be implemented in another shape, such as a single rotor shape that rotates according to the flow of the effluent.

[0040] A turbine shaft (200) according to one embodiment of the present invention is a shaft member that rotates together with a rotating turbine unit (100), and may be configured to transmit power to a generator shaft (300) through a mechanical connection. Similarly, a generator shaft (300) according to one embodiment of the present invention may be configured such that one end is mechanically connected to the turbine shaft (200) to transmit rotational power, and the other end may be connected to a motor of a generator module (400). Accordingly, the generator module (400) may convert the rotational kinetic energy of the generator shaft (300), which rotates together with the turbine shaft (200), into electrical energy to generate power.

[0041] According to one embodiment of the present invention, the turbine shaft (200) and the generator shaft (300) may be configured to determine whether power is transmitted by intermeshing or separating from each other under the control of the PMS module (600). As an example, referring to FIG. 3, a turbine shaft gear (210) may be provided at one end of the turbine shaft (200), and similarly, a generator shaft gear (310) may be provided at one end of the generator shaft (300). The turbine shaft gear (210) and the generator shaft gear (310) rotate according to the rotation of the turbine shaft (200) and the generator shaft (300), respectively, and at least one intermediate gear (250) for power transmission may be additionally provided between the turbine shaft gear (210) and the generator shaft gear (310). However, the power transmission structure between the turbine shaft gear (210) and the generator shaft gear (310) as shown in FIG. 3 is merely an example for easy understanding of the present invention, and it is obvious that the present invention can be implemented in various structures capable of transmitting the rotational power of the turbine shaft (200) to the generator shaft (300).

[0042] In addition, as illustrated in FIG. 4, the turbine shaft (200) and the generator shaft (300) according to one embodiment of the present invention may be configured to be spaced apart from each other to thereby block power transmission. For example, the turbine shaft (200) and / or the generator shaft (300) may be configured to move a predetermined distance or ascend and descend under the control of the PMS module (600) (more specifically, the shaft separation and coupling control unit (630)), and as the turbine shaft (200) and / or the generator shaft (300) move or ascend and descend, the turbine shaft (200) and the generator shaft (300) may be mutually engaged or mutually separated. That is, an inter-shaft connection / separation region (20) may be formed between the turbine shaft (200) and the generator shaft (300).

[0043] The generator module (400) according to one embodiment of the present invention may be configured to charge the regenerative braking energy of the generator shaft (300) generated in a state where power transmission is cut off to the ESS module (500) under the control of the PMS module (600). That is, the generator module (400) according to one embodiment of the present invention may be configured to convert the inertial energy of the generator shaft (300) generated in a state where the generator shaft (300) is disconnected from the turbine shaft (200) into electrical energy and charge the ESS module (500) as regenerative braking energy. For reference, regenerative braking is a braking system that recovers kinetic energy into electrical energy and belongs to a generator-type recovery method.

[0044] An ESS module (500) according to one embodiment of the present invention may be configured to store a portion of the power generated by the generator module (400). As an example, an ESS module (500) according to one embodiment of the present invention may be configured based on a 5 kW iron phosphate battery.

[0045] The present invention can efficiently recover the rotational inertial kinetic energy of the generator shaft (300) as regenerative braking energy by disconnecting the connection between the turbine shaft (200) and the generator shaft (300) through the control of the PMS module (600) and implementing a state in which power transmission is blocked.

[0046] A sensing module (700) according to one embodiment of the present invention may include a turbine sensing unit (720) configured to measure data regarding a rotational speed and rotational phase of a turbine shaft (200) and a generator sensing unit (710) configured to measure data regarding a rotational speed and rotational phase of a generator shaft (300). The sensing module (700) may be communicatively connected to a PMS module (600) and transmit data regarding the measured rotational speed and rotational phase to the PMS module (600).

[0047] Referring to FIG. 6, a PMS module (600) according to an embodiment of the present invention may include a rating determination unit (610), a shaft drive control unit (620), and a shaft separation / coupling control unit (630). For reference, the PMS module (600) may be configured in the form of a computing-capable PCB board. In addition, the PMS module (600) according to an embodiment of the present invention is a control device implemented with a processor, a microprocessor, a controller, a microcontroller, etc., and is communicatively connected to a turbine shaft (200), a generator shaft (300), a sensing module (700), etc., so as to control the turbine shaft (200), the generator shaft (300), etc.

[0048] First, the rating determination unit (610) according to one embodiment of the present invention may be configured to determine whether the generator shaft (300) has entered the rated rotation speed by comparing the real-time rotation speed of the turbine shaft (200) with a preset reference rotation speed. That is, the rating determination unit (610) may be configured to compare the real-time rotation speed of the turbine shaft (200) sensed by the sensing module (700) with a preset reference rotation speed, and determine that the generator shaft (300) has not entered the rated rotation speed if the real-time rotation speed is lower than the reference rotation speed, and determine that the generator shaft (300) has entered the rated rotation speed if the real-time rotation speed is higher than the reference rotation speed.

[0049] For reference, the rated rotation speed is a reference rotation speed set based on the minimum power generation amount that the generator module (400) can be connected to the grid, and as an example, it can be set as the rotation speed of the generator shaft (300) that can output power generation that is greater than or equal to the minimum reference power generation amount (for example, about 70%) that can be connected to the grid based on 100% of the maximum power generation amount of the generator module (400). That is, the rotation speeds of the turbine shaft (200) and the generator shaft (300) can fluctuate depending on the change in discharge amount per unit time, and the rating determination unit (610) can determine that the generator shaft (300) has entered the rated rotation speed when the turbine shaft (200) rotates at a rotation speed that can output power generation that is greater than or equal to the reference power generation amount compared to the rotation speed of the generator shaft (300) that can output 100% of the power generation amount of the generator module (400). For reference, the rated rotation speed and standard power generation amount can be set to various values ​​depending on the specifications of the generator module (400), power generation environment, power transmission environment, etc.

[0050] The shaft separation control unit (630) according to one embodiment of the present invention may be configured to block power transmission by separating the turbine shaft (200) and the generator shaft (300) from each other when the rated rotation speed of the generator shaft (300) has not been reached. In addition, the shaft drive control unit (620) according to one embodiment of the present invention may be configured to drive the generator shaft (300) at the rated rotation speed with power stored in the ESS module (500) when the rated rotation speed of the generator shaft (300) has not been reached.

[0051] That is, when it is determined by the rating judgment unit (610) that the rated rotation speed of the generator shaft (300) has not been reached, the shaft separation and coupling control unit (630) separates the turbine shaft (200) and the generator shaft (300) from each other to block power transmission, and the shaft drive control unit (620) can drive the generator shaft (300) at the rated rotation speed (for example, the rotation speed of the generator shaft (300) capable of outputting about 70% or more of the 100% maximum power generation of the generator module (400)) using the power stored in the ESS module (500) in a state where power transmission between the turbine shaft (200) and the generator shaft (300) is blocked. In this way, the PMS module (600) maintains the rated rotation speed of the generator shaft (300) while the turbine shaft (200) and the generator shaft (300) are spaced apart from each other, thereby preventing rotation interference between the generator shaft (300) and the turbine shaft (200), and at the same time maximizing the small hydropower generation operation rate.

[0052] In addition, the shaft drive control unit (620) can control the generator shaft (300) to the rated rotation speed by receiving power through a general power device (not shown) when all of the power stored in the ESS module (500) is exhausted, or can stop the power generation of the generator module (400) by stopping the rotation of the generator shaft (300). For reference, whether to control the generator shaft (300) to the rated rotation speed by receiving power through a general power device (not shown) or to stop the power generation of the generator module (400) by stopping the rotation of the generator shaft (300) can be determined by comprehensively considering the operating rate, power efficiency, etc. of the entire small hydro power generation system (1000) utilizing shaft-to-shaft connection control.

[0053] In addition, the shaft separation control unit (630) according to one embodiment of the present invention may be configured to separate the turbine shaft (200) and the generator shaft (300) from each other to block power transmission when the generator shaft (300) reaches the rated rotation speed and the rotation speed of the turbine shaft (200) decreases within a preset numerical range. More specifically, the shaft separation control unit (630) may be configured to block power transmission between the turbine shaft (200) and the generator shaft (300) by separating the turbine shaft (200) and the generator shaft (300) from each other when the generator shaft (300) is determined by the rating determination unit (610) to have entered the rated rotation speed and the rotation speed of the turbine shaft (200) sensed in real time by the sensing module (700) decreases within a preset numerical range (for example, a rotation speed numerical range of the turbine shaft (200) capable of outputting about 70% to 95% of the 100% generation of the generator module (400). For reference, the numerical range that serves as the basis for the inter-axle power transmission cutoff of the shaft separation / coupling control unit (630) and the minimum reduction unit value that serves as the basis for determining the rotational speed reduction of the turbine shaft (200) may be set differently in consideration of the regenerative braking charging efficiency of the generator module (400), the power usage rate for controlling the turbine shaft (200) and the generator shaft (300), etc. For example, the numerical range that serves as the basis for the inter-axle power transmission cutoff of the shaft separation / coupling control unit (630) may be set to a rotational speed numerical range of the turbine shaft (200) that can output about 70% to 95% of the 100% power generation of the generator module (400), and the minimum reduction unit value that serves as the basis for determining the rotational speed reduction of the turbine shaft (200) may be set to a rotational speed reduction value that causes a power generation reduction of about 5% of the 100% maximum power generation of the generator module (400).

[0054] Next, the generator module (400) according to one embodiment of the present invention may be configured to charge the regenerative braking energy of the generator shaft (300) generated in a state where power transmission is blocked to the ESS module (500) under the control of the PMS module (600). That is, the generator module (400) may charge the regenerative braking energy of the generator shaft (300) generated in a state where power transmission is blocked to the ESS module (500) under the control of the PMS module (600) when the generator shaft (300) enters the rated rotation speed and the rotation speed of the generator shaft (300) decreases within a preset numerical range. In this way, the regenerative braking energy of the generator shaft (300) is charged to the ESS module (500) and the charged power is discharged to utilize it for generating rotational electromotive force of the generator shaft (300), thereby minimizing the reactive power of small hydropower generation while maximizing the power generation operation rate.

[0055] Meanwhile, the shaft drive control unit (620) according to one embodiment of the present invention can control the rotation speed and rotation phase of the generator shaft (300) to correspond to the rotation speed and rotation phase of the turbine shaft (200) by using the power charged in the ESS module (500) when the generator shaft (300) enters the rated rotation speed and the rotation speed of the turbine shaft (200) increases within a preset numerical range. That is, when the generator shaft (300) is judged to have entered the rated rotation speed by the rating determination unit (610) and the rotation speed of the turbine shaft (200) sensed in real time by the sensing module (700) increases within a preset numerical range (for example, a rotation speed numerical range of the turbine shaft (200) capable of outputting about 70% to 95% of the 100% generation of the generator module (400), the shaft drive control unit (620) controls the generator shaft (300) with power from the ESS module (500) charged by regenerative braking energy while the turbine shaft (200) and the generator shaft (300) are separated from each other, thereby enabling the turbine shaft (200) and the generator shaft (300) to be interconnected and transmit power smoothly, thereby making the rotation speeds and rotation phases of the turbine shaft (200) and the generator shaft (300) correspond to each other.

[0056] Next, the shaft separation and coupling control unit (630) according to one embodiment of the present invention can control the turbine shaft (200) and the generator shaft (300) to be mutually connected to each other when the rotational speeds and rotational phases of the turbine shaft (200) and the generator shaft (300) correspond to each other, thereby enabling power transmission. That is, the shaft separation and coupling control unit (630) can control the turbine shaft (200) and the generator shaft (300) to be mutually connected to each other by raising and lowering or moving the turbine shaft (200) and the generator shaft (300) to a predetermined distance when the shaft drive control unit (620) controls the generator shaft (300) to correspond the rotational speeds and rotational phases of the turbine shaft (200) and the generator shaft (300), thereby enabling power transmission to each other.

[0057] Hereinafter, a method for generating small hydropower using inter-axis connection control implemented by a small hydropower generation system (1000) using inter-axis connection control according to one embodiment of the present invention will be described.

[0058] A micro-hydro power generation method utilizing shaft-to-shaft connection control according to one embodiment of the present invention can first determine whether the rated rotation speed of the generator shaft (300) has been reached by comparing the real-time rotation speed of the turbine shaft (200) with a preset reference rotation speed.

[0059] Next, when the generator shaft (300) enters the rated rotation speed and the rotation speed of the turbine shaft (200) decreases within a preset numerical range, the turbine shaft (200) and the generator shaft (300) are separated from each other to block power transmission, and the regenerative braking energy of the generator shaft (300) generated in the state where power transmission is blocked can be charged to the ESS module (500) according to the control of the PMS module (600). When the generator shaft (300) enters the rated rotation speed and the rotation speed of the turbine shaft (200) increases within a preset numerical range, the rotation speed and rotation phase of the generator shaft (300) can be controlled to correspond to the rotation speed and rotation phase of the turbine shaft (200) using the power charged to the ESS module (500), and the turbine shaft (200) and the generator shaft (300) in a mutually separated state can be interconnected to control power transmission.

[0060] In addition, when the rated rotation speed of the generator shaft (300) is not reached, the turbine shaft (200) and the generator shaft (300) are separated from each other to block power transmission, and the generator shaft (300) can be driven at the rated rotation speed using the power stored in the ESS module (500).

[0061]

[0062] As described above, the micro-hydro power generation method and system utilizing shaft-to-shaft connection control according to one embodiment of the present invention can easily maximize the efficiency of micro-hydro power generation even when the discharge amount fluctuates through connection control between the turbine shaft and the generator shaft.

[0063] In addition, the micro-hydro power generation method and system utilizing shaft-to-shaft connection control according to one embodiment of the present invention can minimize micro-hydro power generation reactive power while improving the power generation operation rate by controlling shaft-to-shaft separation and connection in real time while charging the regenerative braking energy of the generator shaft to the ESS module and discharging the charged power to use it for generating rotational electromotive force of the generator shaft.

[0064] The effects that can be obtained from the examples are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly derived and understood by a person having ordinary skill in the art based on the detailed description below.

[0065]

[0066] Meanwhile, the various embodiments described herein may be implemented by hardware, middleware, microcode, software, and / or a combination thereof. For example, the various embodiments may be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, other electronic units designed to perform the functions presented herein, or a combination thereof.

[0067] Additionally, for example, various embodiments may be embodied or encoded in a computer-readable medium containing instructions. Instructions embodied or encoded in the computer-readable medium may cause a programmable processor or other processor to perform a method when the instructions are executed, for example. A computer-readable medium includes a computer storage medium, which may be any available medium that can be accessed by a computer. For example, such a computer-readable medium may include a RAM, a ROM, an EEPROM, a CD-ROM or other optical disk storage medium, a magnetic disk storage medium, or other magnetic storage devices.

[0068] Such hardware, software, firmware, etc. may be implemented within the same device or within separate devices to support the various operations and functions described herein. Additionally, components, units, modules, components, etc. described as “units” in the present invention may be implemented together or individually as separate but interoperable logic devices. The depiction of different features for modules, units, etc. is intended to highlight different functional embodiments and does not necessarily imply that they must be realized by separate hardware or software components. Rather, the functionality associated with one or more modules or units may be performed by separate hardware or software components, or integrated into common or separate hardware or software components.

[0069] Although operations are depicted in the drawings in a specific order, this should not be construed as requiring that these operations be performed in the specific order depicted, or in any sequential order, or that all depicted operations be performed to achieve the desired results. In certain circumstances, multitasking and parallel processing may be advantageous. Furthermore, the distinction between the various components in the embodiments described above should not be construed as requiring such distinction in all embodiments, and it should be understood that the components depicted may generally be integrated together into a single software product or packaged into multiple software products.

[0070] The various embodiments described above may be embodied in other specific forms without departing from the technical idea and essential characteristics thereof. Therefore, the above detailed description should not be construed as limiting in all respects but rather as illustrative. The scope of the various embodiments should be determined by a reasonable interpretation of the appended claims, and all changes within the equivalent scope of the various embodiments are included within the scope of the various embodiments. Furthermore, claims that are not explicitly cited in the claims may be combined to form an embodiment or incorporated into a new claim through a post-application amendment.

Claims

1. As a small hydropower generation system utilizing inter-axis connection control, A turbine unit configured to rotate by effluent; A turbine shaft configured to be connected to the turbine unit and rotate together with it; A generator shaft configured to interlock with a portion of the turbine shaft and rotate together; A generator module connected to the generator shaft and configured to generate power according to rotation of the generator shaft; An ESS module configured to store a portion of the power generated by the above generator module; A sensing module configured to measure the rotational speed and rotational phase of the turbine shaft and generator shaft in real time; and A PMS module configured to analyze data on rotational speed and rotational phase measured by the sensing module and control the drive of the generator shaft with power stored in the ESS module according to the preset analysis results. including, A small hydropower generation system utilizing inter-axle linkage control.

2. In paragraph 1, The above PMS module, A rating determination unit configured to determine whether the generator shaft has reached the rated rotation speed by comparing the real-time rotation speed of the turbine shaft with a preset reference rotation speed; and A shaft drive control unit configured to drive the generator shaft at the rated rotation speed using the power stored in the ESS module when the rated rotation speed of the generator shaft is not reached. including, A small hydropower generation system utilizing inter-axle linkage control.

3. In paragraph 2, The above turbine shaft and the above generator shaft, It is configured to determine whether power is transmitted by interlocking or separating each other according to the control of the above PMS module, The above PMS module, A shaft separation control unit configured to separate the turbine shaft and the generator shaft from each other to block power transmission when the generator shaft reaches the rated rotation speed and the rotation speed of the turbine shaft decreases within a preset numerical range. Including more, The above generator module, It is additionally configured to charge the regenerative braking energy of the generator shaft generated in a state where the power transmission is blocked to the ESS module according to the control of the PMS module. A small hydropower generation system utilizing inter-axle linkage control.

4. In paragraph 3, The above shaft drive control unit, When the generator shaft enters the rated rotation speed and the rotation speed of the turbine shaft increases within a preset numerical range, the rotation speed and rotation phase of the generator shaft are controlled to correspond to the rotation speed and rotation phase of the turbine shaft by the power charged in the ESS module, The above axis separation and coupling control unit is, When the rotational speed and rotational phase of the turbine shaft and the generator shaft correspond to each other, the turbine shaft and the generator shaft, which are in a mutually separated state, are controlled to be interconnected so that power transmission is possible. A small hydropower generation system utilizing inter-axle linkage control.

5. In paragraph 3, The above axis separation and coupling control unit is, When the rated rotation speed of the generator shaft is not reached, the turbine shaft and the generator shaft are additionally configured to separate each other to block power transmission. A small hydropower generation system utilizing inter-axle linkage control.

6. A method for generating small hydropower using shaft connection control implemented by a small hydropower generation system using shaft connection control according to Article 1, A step of determining whether the rated rotation speed of the generator shaft has been reached by comparing the real-time rotation speed of the turbine shaft with a preset reference rotation speed; When the generator shaft enters the rated rotation speed and the rotation speed of the turbine shaft decreases within a preset numerical range, a step of mutually separating the turbine shaft and the generator shaft to block power transmission, and charging the regenerative braking energy of the generator shaft generated in the state where the power transmission is blocked to the ESS module according to the control of the PMS module; and When the rated rotation speed of the generator shaft is not reached, a step of blocking power transmission by separating the turbine shaft and the generator shaft from each other, and driving the generator shaft at the rated rotation speed with the power stored in the ESS module. including, A method for small-scale hydropower generation using inter-axis connection control.

Images