KR-102962144-B1 - Small hydro-power generation operation system using drop and flow rate

Abstract

The present invention relates to a small hydropower generation operation system that generates power using flowing water in a target area, comprising: a main turbine for converting the potential energy of the flowing water into kinetic energy; a main generator for generating power using the kinetic energy of the main turbine; an auxiliary turbine for converting the potential energy of the flowing water into kinetic energy; an auxiliary generator for generating power using the kinetic energy of the auxiliary turbine; an Energy Storage System (ESS) for storing power generated from the auxiliary generator; a water level sensor for measuring the water level of the flowing water; a flow rate sensor for measuring the flow rate of the flowing water; and a control device that controls the overall small hydropower generation operation system and supplies power to power demand locations requiring power supply through the main generator and the auxiliary generator. According to the present invention, by providing a PMSG and an IG to generate small hydropower, it is possible to improve power generation efficiency at a low cost.

Inventors

• 박준은

Assignees

• 비티에너지주식회사

Dates

Publication Date

20260508

Application Date

20240527

Claims (4)

1. In a small hydropower operation system that generates power using flowing water in the target area, A main turbine for converting the potential energy of the above-mentioned water into kinetic energy; A main generator for generating electricity using the kinetic energy of the above main turbine; An auxiliary turbine for converting the potential energy of the above-mentioned water into kinetic energy; An auxiliary generator for generating electricity using the kinetic energy of the above auxiliary turbine; Energy Storage System (ESS) for storing power generated from the above auxiliary generator; A water level sensor for measuring the water level of the above-mentioned flow; A flow sensor for measuring the flow rate of the above-mentioned water; and It includes a control device that controls the overall operation of the above-mentioned small hydropower generation system and supplies power to power demand locations requiring power supply through the above-mentioned main generator and the above-mentioned auxiliary generator, A small hydroelectric power generation operation system characterized by, when the main generator requires driving power for operation, the control device controls the auxiliary turbine and the auxiliary generator to generate power equal to the driving power of the main generator, thereby allowing the power generated from the auxiliary generator to be charged into the ESS, supplying the power stored in the ESS to the main generator for operation, and supplying power to the power demand location through the main generator, calculating the head data of the flow rate from the water level data received from the water level sensor, and controlling the operation method, which is the driving method of the main turbine and the auxiliary turbine, using the calculated head data and the flow rate data received from the flow rate sensor.
2. In claim 1, A small hydropower generation operation system characterized in that the main generator above includes an induction generator (hereinafter IG) and is a generator that requires grid power during startup.
3. In claim 1, A small hydropower generation operation system characterized in that the above auxiliary generator includes a Permanent Magnet Synchronous Generator (hereinafter PMSG) and is a generator that does not require grid power during startup.
4. delete

Description

Small hydro-power generation operation system using drop and flow rate The present invention relates to a small hydropower generation operation system, and more specifically, to a small hydropower generation operation system utilizing head and flow rate. Generally, hydroelectric power generation is performed by converting the kinetic energy of water into electrical energy using the drop and flow rate. It can be classified into large-scale hydroelectric power generation, which generates power through the drop phenomenon by blocking river water or constructing a dam, and small-scale hydroelectric power generation, which utilizes flowing water by applying it to small streams, irrigation canals, and various water treatment facilities, with an installed capacity of less than 10 MW. Among these types of hydroelectric power generation, small-scale hydroelectric power is widely used in various sectors because it is environmentally friendly compared to other large-scale hydroelectric power facilities and has no dependence on overseas raw materials. Areas with demand for small-scale hydropower are primarily off-grid regions not connected to the external power grid; in particular, water-rich regions provide a favorable environment for small-scale hydropower generation, creating a situation where reliance on small-scale hydropower is necessary to meet electricity demand. The generator accounts for the largest portion of the total system equipment cost for small hydropower generation. The generators mainly used in small hydropower generation are induction generators (IGs) and permanent magnet synchronous generators (PMSGs). IGs have advantages such as being relatively inexpensive, having excellent robustness, and low maintenance costs, but they have the disadvantage of requiring external (reactive) power from the grid. On the other hand, PMSGs have the advantage of being usable without external excitation current, but they have the disadvantage of being relatively expensive. In the case of small-scale hydropower generation in water-rich regions, it is economical to use IGs, which are relatively inexpensive, robust, and have low maintenance costs. However, since most regions are off-grid and not connected to the grid, there is a problem in that IGs cannot be used because they must first be started in motor mode using external power to rotate the turbine and then converted to generator mode. Therefore, in the case of off-grid power generation, PMSGs, which are more than three times more expensive than IGs, must generally be used. Due to the resulting increase in equipment costs, small-scale hydropower generation has not been widely expanded. FIG. 1 is a block diagram schematically illustrating the configuration of a small hydropower generation operation system according to one embodiment of the present invention. FIG. 2 illustrates an implementation of a small hydropower generation operation system according to one embodiment of the present invention. FIG. 3 is a flowchart showing a method of operating a generator in a small hydropower generation operation system according to one embodiment of the present invention. FIG. 4 is a flowchart showing a method for operating a small hydropower generation system according to one embodiment of the present invention. FIG. 5 is a flowchart illustrating a driving method according to the flow rate in a small hydropower generation operation system according to one embodiment of the present invention. The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this applicatio