KR102341359B1 - Renewable Energy Power Supply System - Google Patents

Abstract

The present invention produces power through renewable energy without external energy supply in an area where power energy resources are not abundant, such as an extreme area, but maintains a constant power charge state of a plurality of independently multi-linked energy storage devices, and the load It relates to a new and renewable energy multiple linkage type power supply system that can supply power in response.

Description

Renewable Energy Multiple Linked Power Supply System {Renewable Energy Power Supply System}

The present invention relates to a power supply system, and in detail, a plurality of independently multi-linked energy storage devices that produce power through renewable energy without supply of external energy in an area where power energy resources are not abundant, such as an extreme area. It relates to a renewable energy multiple linkage type power supply system that can supply power in response to a load while maintaining a constant power charge state.

Renewable energy generation technology has been spotlighted as a leader in the green growth industry, a new growth engine due to global environmental issues, climate change agreements, diversification of future energy sources, a new paradigm change in the 21st century, and improvement of the quality of human life.

In particular, micro-grid formation through solar power generation system construction is being actively promoted in areas where it is difficult to build infrastructure due to low population density compared to large land, and small-scale solar/wind power/energy storage system (ESS) convergence system By applying a power system using

However, there are still many difficulties in carrying out long-term work in the field due to the shortage of manpower and extreme environments in many countries. The supply system has not been developed.

In a situation where competition among developed countries for energy self-sufficiency markets in developing countries is expected to intensify, in island regions without electric power infrastructure, renewable energy is more economical than conventional fuel, and government subsidies are expected to increase significantly in recent years. .

Accordingly, microgrid is developed as a stand-alone power generation system that can be used without external energy supply by maximizing efficiency with energy saving and peak reduction in small-scale systems, single operating entities, and small clusters of various load types, as well as eco-friendly low-carbon energy. Zero-house technology and convergence development are required.

Republic of Korea Patent Registration No. 10-1336042 (12013.11.27)

The present invention was created to satisfy the above needs, and an object of the present invention is to efficiently use energy by operating a cluster consisting of several units according to the situation in an area where electric power and energy resources are not abundant, such as an extreme area, Renewable energy multiple linkage type power supply system that can be easily assembled and installed locally and can supply power in response to load and produce power through renewable energy without external energy supply by controlling the temperature of the battery and control panel uniformly is to provide

For the above purpose, the present invention provides a container having an opening and closing door, a photovoltaic power module that can be accommodated in the container but is withdrawn to the outside through the opening and closing door to produce power through sunlight, and the generated power is stored a storage device that converts DC power into AC power and supplies the first inverter to a load; It includes a charging/discharging module to apply, a switching unit for linking the power stored in the storage device to a link line according to a control signal, and a control unit for controlling the charging/discharging module, identifying power generation and storage status, and generating a control signal a plurality of power generation units; a link line including a power line connected to the switching unit and a communication line connected to the control unit; Including, one power generation unit selected from among the plurality of power generation units is designated as a main unit and the other power generation units are designated as local units, and the main unit is replaced with a second inverter in which the first inverter has a relatively large capacity. and a monitoring unit connected to the link line to collect power information and control signals, and a main control that generates a control signal corresponding to the power production and storage status of the main unit and the local unit and applies it to the local unit through the communication line It is characterized in that it further comprises a module.

In this case, the power generation unit further includes a wind power generation module installed on the upper side of the container and generating power through wind power, wherein the charging/discharging module applies the power generated by the wind power generation module to the storage device or the first inverter. a generator for generating electric power through a prime mover, a conversion module for converting electric power produced by the generator into direct current power, and a direct current that is connected to the link line to drive the generator according to a control signal and produce and converted direct current an auxiliary unit having a linkage unit for linking power to the power line; may further include.

In addition, the photovoltaic power module, a photovoltaic panel for generating electric power through sunlight, and a support frame having a leg portion for supporting the photovoltaic panel from the upper side of the container but disposing the photovoltaic panel to have a set inclination. can be configured.

In addition, the container is provided with a thermal insulation wall, and a compartment in which the storage device is accommodated and a heating/cooling device for controlling the temperature inside the compartment using a thermoelectric element, monitoring a fire inside the compartment, and extinguishing a fire when a fire occurs It is preferable to further include a fire extinguishing device that does.

Through the present invention, it is possible to become self-sufficient in electric power even in regions where electric energy resources are not abundant due to poor climate and natural environment and unsatisfactory power transmission infrastructure.

In particular, when generating power independently in a multi-connection method, when the remaining power of other storage devices is below the standard value, the remaining connected storage devices can supply insufficient power, thereby maintaining a balanced power charge state of a plurality of energy storage devices. , it is possible to bear a large-capacity load by concentrating the power in one place when necessary.

In addition, it can be applied and utilized as a multi-linked small (10kWh) small-scale independent power generation system by applying a multi-connected power supply system solution to be self-sufficient in electricity using solar power generation in extreme environments.

1 is a conceptual diagram showing an installation state according to an embodiment of the present invention;
2 is a block diagram showing the configuration of a main unit according to an embodiment of the present invention;
3 is a block diagram showing the configuration of a local unit according to an embodiment of the present invention;
4 is a block diagram showing the configuration of the entire system according to an embodiment of the present invention;
5 is a perspective view showing a structure of a solar power module according to an embodiment of the present invention;
6 is a first conceptual diagram showing the appearance of an electric vehicle charging station to which the present invention is applied;
7 is a second conceptual diagram showing the appearance of an electric vehicle charging station to which the present invention is applied.

Hereinafter, with reference to the accompanying drawings, the configuration of the renewable energy multi-linked power supply system of the present invention will be described in detail.

1 is a conceptual diagram showing an installation state according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a main unit according to an embodiment of the present invention, and FIG. 3 is a configuration of a local unit according to an embodiment of the present invention 4 is a block diagram showing the configuration of the entire system according to an embodiment of the present invention, and the present invention is a new and renewable energy multi-linkage power supply system applied to an extreme environment where infrastructure construction is difficult, and each power generation The unit 1 becomes a kind of prosumer that generates power by itself or consumes its own load by using sunlight, and forms a microgrid by connecting multiple if necessary.

For this purpose, a large number of power generation units (1) including a container (11), a solar power module (12), and a storage device (14) are provided as a main configuration, and electric power is produced by moving it to a necessary place and easily deploying and installing it. , will supply

The container 11 is actually a case for the movement and installation of the power generation unit 1, and a technology capable of internal temperature control is applied to ensure operation in an extreme environment area by providing an insulating wall, and space is provided inside. A power generation unit including a photovoltaic power generation module 12, a storage device 14, a first inverter 15a, a charge/discharge module 16, a switching unit 17 and a control unit 18a ( The overall composition of 1) will be accepted.

In the lateral direction of the container 11, an opening and closing door is mounted and opened. At this time, it is possible to have a structure in which only one side is opened, but the opening and closing doors are installed on both sides in the horizontal direction so that the solar power module can be put in and out, and the side wall can be separated if necessary, and it can be used in various forms according to the business model. .

In addition, since the in and out of the photovoltaic power module 12 accommodated therein is made through the opening and closing door, an opening and closing door is formed corresponding to the size of the photovoltaic power module 12, but a rectangular photovoltaic power module is erected in the longitudinal direction or It is configured so that deposit and withdrawal can be made in a lying state.

In addition, the storage device 14 is located on one side of the container 11, and a separate compartment 111 is provided in which the air conditioning system 112, the fire extinguishing system 113, and the control unit 18a are located.

The compartment 111 isolates the storage device 14 from the space according to various uses, including the solar power module according to movement and storage, and is basically composed of an insulating material, but is affected by the outside temperature and By maintaining the temperature of the storage device 14, which is likely to cause a decrease in efficiency, at an appropriate temperature through the heating/cooling device 112, optimal management is performed and fire is prevented. At this time, since the energy loss is large in the case of an air conditioning method based on compression, condensation, and evaporation of a refrigerant as well as an existing heat transfer means, the heating and cooling device 112 is implemented with a simple structure including a thermoelectric element and a cooling fan.

In addition, due to the structure of the compartment 111, it is possible to effectively respond to the possibility of fire in the storage device 14, and to prevent damage to the internal components including the solar power module 12 due to the flame even in an unexpected fire. By blocking the operation of the fire extinguishing device 113 provided in the and the supply of oxygen from the outside, rapid fire-fighting can be achieved.

In the compartment 111, a control unit 18a and a first inverter 15a or a switching unit 17 for power control may be located, and a separate door for entering the compartment other than the opening and closing doors on both sides for the manager's access is provided. can be formed

A receiving unit for accommodating the photovoltaic power generation module 12 in a vertical direction or a horizontally lying state may be installed on the ceiling and the bottom surface or both side walls of the container 11, and a guide groove is provided in the receiving unit in the longitudinal direction. Doedoe is formed in a plurality of spaced apart from each other, the photovoltaic power generation module is inserted can be accommodated in the receiving portion inside the container at regular intervals.

The photovoltaic power module 12 is configured to generate power by being pulled out through the opening and closing door and then erected in a state that is seated and accommodated inside the container 11 during transport and storage, and basically through sunlight It is composed of a photovoltaic panel for generating electric power, and a support frame 122 for installing the photovoltaic panel.

5 is a perspective view showing the structure of a solar power module according to an embodiment of the present invention.

In the present invention, the photovoltaic power module 12 includes a photovoltaic panel 121 that generates electric power through sunlight, and supports the photovoltaic panel 121 on the upper side of the container 11, but the photovoltaic panel 121 ) is composed of a support frame 122 having a leg portion 127 disposed to have a set inclination.

In addition, the photovoltaic power module 12 is seated inside the container 11 and is a means for facilitating extraction to the outside in the received state, the upper end of the support frame 122 supporting the photovoltaic panel 121 and It may include two or more wheels each mounted on the bottom.

As the wheel moves in the above-mentioned guide groove, it is possible to easily withdraw and insert the solar power module.

In addition, the support frame 122 of the photovoltaic module 12 includes a leg portion 127 capable of disposing the photovoltaic panel 121 at a predetermined inclination angle. Such a solar panel 121 may be installed on the ground side of the container 11, but in an embodiment of the present invention, the solar panel 121 is installed on the container 11 to generate electricity and reach direct sunlight to the container. to reduce the container temperature rise.

The leg part 127 is mounted on the upper end and lower end of the support frame 122 to separate the solar panel 121 from the upper part of the container 11, and has a relatively long long leg 127a at the upper end. ) is mounted, and a short leg (127b) having a relatively short length is mounted at the lower end.

Due to the long legs 127a and the short legs 127b, the solar panel 121 may be inclined with respect to the upper part of the container. And since the inclination angle of the solar panel 121 is determined by the length and angle of the long leg 127a and the short leg 127b with respect to the solar panel 121, the length and angle can be adjusted. This may apply.

In addition, in the embodiment of the present invention, the solar panel 121 is disposed at a specific inclination angle with respect to the upper part of the container, and the solar panel 121, the long leg 127a, and the short leg 127b are disposed at the specific inclination angle. A configuration capable of maintaining an angle is adopted.

Specifically, a 'C'-shaped bracket 123 is mounted on the support frame 122, and when the long leg 127a or the short leg 127b is inserted into the bracket 123, the bracket 123 is attached to the bracket 123. The rotation pin 124 is inserted into the formed through hole. At this time, a first friction piece 128 is mounted on one surface of the long leg 127a and the short leg 127b, and a second friction piece 125 corresponding to the first friction piece 128 is mounted on the bracket 123 . ) is installed.

The first and second friction pieces 128 and 125 are respectively formed with first and second locking pieces 128a and 125a at the ends while forming a curved surface on one side.

Therefore, before the long leg 127a and the short leg 127b are unfolded, the first and second friction pieces 128 and 25 are arranged to overlap each other, and when the long leg 127a and the short leg 127b are unfolded, , as the first friction piece 128 passes over the second friction piece 125 while rotating with the rotation of the long leg 127a and the short leg 127b and comes into contact with each other, the mutual friction force increases, and eventually, It is mutually bound by the first and second locking pieces 128a and 125a of the ends, and further rotation is limited. This binding can be released by an external force in the opposite direction of rotation, and it can be operated only by the force of the operator without a separate tool.

The storage device 14 is an Energy Storage System (ESS) that is electrically connected to the photovoltaic power generation module 12 to store electricity produced by the photovoltaic power module 12, a battery, and electric power. It includes a converter (PCS) and an energy management solution (EMS), etc., and is installed in the inner compartment 111 of the container 11 and managed as described above.

These storage devices 14 vary in quantity according to the scale of the business model and system to which the present invention is to be applied by applying a lithium ion power well battery pack, etc. Since it is applicable to a known configuration, a detailed description thereof will be omitted in order to avoid obscuring the gist of the invention.

The first inverter 15a is configured to convert DC power into AC power and supply it to a load, and the capacity of the storage device 14 of each power generation unit 1 is adjusted to a relatively low load corresponding to 10.0 kWh based on 10.0 kWh. It is designed to supply power.

The charging/discharging module 16 is configured to store the electric power produced by the solar power generation module 12 in the storage device 14 and to apply the produced or stored electric power to the first inverter 15a. It is connected to the solar power module 12 and the storage device 14 to charge the storage device 14 and supply power from the storage device 14 to a load or a power line 21 to be described later.

The switching unit 17 is a kind of switch, which is connected to the charging/discharging module 16 and connects the power stored in the storage device 14 to the linkage line 2 according to a control signal to transfer power between a plurality of power generation modules. make it possible to share

The control unit 18a is configured to control the switching unit 17 and the charging/discharging module 16, grasp the power generation and storage status, and generate a control signal, and the power storage status and the need for the connected load. The capacity is checked, the supply to the load is controlled according to the remaining capacity of the storage device, and the storage device 14 is efficiently operated.

The link line 2 is a kind of cable for interconnecting a plurality of power generation units 1 and performing power sharing and communication, and a power line 21 connected to the switching unit 17 provided in each power generation unit 1 . ) and a communication line 22 connected to the control unit 18a.

As mentioned above, in the present invention, the power generation unit 1 as described above is made in plurality and constitutes one system, and each power generation unit 1 is operated substantially independently and power production and supply can be made, , in the present invention, one power generation unit selected from among a plurality of power generation units is designated as the main unit (1a) and the other power generation units are designated as the local unit (1b) for connection as necessary to configure the system.

In addition, each power generation unit 1 basically includes a solar panel 121 for independent power generation, but a power generation method using various types of renewable energy may be added depending on the installation environment, and the accompanying drawings As such, it is installed on the upper side of the container 11 and further includes a wind power generation module 13 for generating power through wind power, wherein the charge/discharge module 16 receives the power generated by the wind power generation module 13. It is configured to apply to the storage device or the first inverter 15a, and additional power generation may be made.

In the embodiment of the present invention, the system is made of one main unit (1a) and four local units (1b), but this is not fixed, but may be reduced or increased. In addition, the main unit (1a) and the local unit (1b) is a kind of master-slave method, and while the main configuration is substantially the same, the configuration of software for capacity and control of some configurations is different.

Specifically, in the main unit 1a, the first inverter 15a performs the same function, but is replaced by a second inverter 15b having a relatively large capacity, and is connected to the connection line 2 to each local unit A monitoring unit 19 that collects power information and control signals from (1b) and a control signal corresponding to the power production and storage status of the main unit and the local unit 1b are generated through the communication line to the local unit 1b It further includes a main control module (18b) for applying to.

In general, the load usage amount of each power generation unit 1 cannot be the same, and the load time also varies a lot depending on the user's power usage pattern. There may be a case in which the power produced by being fully charged is wasted. At this time, power is shared between the power generation units 1 through the linkage line 2 to reduce idle energy generation while maintaining the energy balance in the cluster.

That is, the local unit 1b is an independent device that charges the storage device 14 with power from sunlight and consumes load power by itself through the first inverter 15a, and the selected main unit 1a is A large-capacity second inverter 15b capable of handling a relatively large-capacity load, a monitoring unit 19, and a main control module 18b for controlling the whole are provided.

At this time, all power generation units 1 have a communication line 22 and a power line 21 connected in parallel to the main control module 18b of the main unit as shown in FIG. In the disconnected state or when power is shared, the connection is made to the connection line (2).

In addition, in principle, the local unit (1b) can continue to use the load by itself independently of the power supply for the purpose of handling the large-capacity load of the main unit when sharing power through multiple linkage, and at this time, DC power is shared because power quality problems such as voltage drop may occur due to inrush current generation.

For this purpose, communication between the main unit (1a) and each local unit (1b) can be done in an RS-485 serial method, and the monitoring unit 19 is based on C++-based MFC programming to serve as PMS and EMS. It receives data from the entire power generation unit 1 and collects and monitors information such as generated voltage, generated current, battery voltage, battery current, load voltage, load current, and output frequency and power factor. According to the battery voltage state of each local unit (1b), the associated current is autonomously adjusted during multi-connection, but it is possible to control whether to participate in load sharing and switch the power supply and demand mode through the main control module (18b).

That is, the main control module 18b determines whether a heavy load is connected when a heavy load is applied to the main unit, checks the power margin of the remaining local units 1b, and can participate in the power-intensive linkage. will be determined If the power margin is sufficient, it will bear the heavy load, and if it is insufficient, the load will be cut off.

In addition, as a means for urgent power use, a generator 31 that produces power through a prime mover, a conversion module 32 that converts the power produced by the generator into DC power, and the connection line 2 are connected It may further include an auxiliary unit 3 that drives the generator 31 according to a control signal and has a linkage unit 33 for linking the produced and converted DC power to the power line. This is an emergency power supply means to be used when power generation through solar or wind power is not achieved for a long period of time, when a major problem occurs in the system or when urgent load power is required. And unlike the power generation unit, it consumes fuel, so that in a preset abnormal situation, driving and stopping are performed by the control signal of the main control module 18b.

6 is a first conceptual diagram showing the appearance of an electric vehicle charging station to which the present invention is applied, and FIG. 7 is a second conceptual diagram illustrating an electric vehicle charging station to which the present invention is applied. It shows the station.

In other words, it is a charging-related complex facility equipped with a fast charger for electric vehicles by applying the system according to the present invention, which increases the operating efficiency of the energy storage system by multiple connection of the renewable energy generation system and the ESS, and is linked with renewable energy representative of solar power. It is composed of a power supply facility, charging facility, interface, and information system, and it is a technology convergence that promotes the integration of infrastructure such as the application of rapid chargers and the driver's waiting space during rapid charging.

As mentioned above, the charging capacity of each power generation unit (1) is 10㎾h based on the combination of 5 power generation units, and the capacity of 50㎾h is possible. of the maximum charging current performance, and by constructing simple facilities including various interior constructions, independent power production and supply can be made even in polar environments.

The right of the present invention is not limited to the above-described embodiments, but is defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. it is self-evident

1: power generation unit 1a: main unit 1b: local unit
11: container 111: compartment 112: air conditioning unit
113: fire extinguishing system
12: solar power module 121: solar panel 122: support frame
123: bracket 124: rotary pin
125: second friction piece 125a: second engaging piece
126: wheel 127: leg portion
127a: long leg 127b: short leg
128: first friction piece 128a: first jamming piece
13: wind power module 14: storage device
15a: first inverter 15b: second inverter
16: charging/discharging module 17: switching part
18a: control unit 18b: main control module
19: monitoring unit
2: Linked line 21: Power line 22: Communication line
3: auxiliary unit 31: generator 32: conversion module
33: linkage

Claims (4)

A container 11 having an opening and closing door, a photovoltaic power generation module 12 that can be accommodated inside the container 11 but is withdrawn to the outside through the opening and closing door to generate power through sunlight, and the generated power is stored a storage device 14, a first inverter 15a that converts DC power into AC power and supplies it to a load, and the power generated by the solar power module 12 is stored in the storage device 14, A charging/discharging module 16 that applies the generated or stored power to the first inverter 15a, and a switching unit 17 that connects the power stored in the storage device 14 to the linkage line 2 according to a control signal. and a plurality of power generation units (1) including a control unit (18a) for controlling the charging/discharging module (16), identifying power generation and storage status, and generating a control signal;
a connection line (2) including a power line (21) connected to the switching unit (17) and a communication line (22) connected to the control unit (18a); including,
One power generation unit selected from among the plurality of power generation units is designated as the main unit (1a) and the other power generation units are designated as the local unit (1b),
The main unit 1a is a monitoring unit in which the first inverter 15a is replaced with a second inverter 15b having a relatively large capacity, and is connected to the connection line 2 to collect power information and control signals. (19), and a main control module (18b) that generates a control signal corresponding to the power production and storage status of the main unit and the local unit and applies it to the local unit through the communication line (22);
The photovoltaic power module 12 supports a photovoltaic panel 121 that generates electric power through sunlight, and the photovoltaic panel 121 from an upper side of the container 11, but the solar panel has a set inclination. Consists of a support frame 122 having a leg portion 127 disposed to have,
The leg portion 127 is mounted on the upper end and lower end of the support frame 122 to separate the solar panel 121 from the ground, and a relatively long long leg 127a is mounted on the upper end, and , a relatively short short leg (127b) is mounted at the bottom,
The solar panel 121 is disposed at a specific inclination angle with respect to the upper part of the container, and at the specific inclination angle, the solar panel 121 and the long leg 127a and the short leg 127b are supported so that the angle can be maintained. A 'C'-shaped bracket 123 is mounted on the frame 122, and when a long leg 127a or a short leg 127b is inserted into the bracket 123, a rotation pin ( 124) is inserted, a first friction piece 128 is mounted on one surface of the long leg 127a and the short leg 127b, and a first friction piece 128 corresponding to the first friction piece 128 is mounted on the bracket 123. The two friction pieces 125 are mounted, and the first and second friction pieces 128 and 125 are curved to one side and have first and second locking pieces 128a and 125a formed at the ends, respectively. Renewable energy multi-linked power supply system, characterized in that.
According to claim 1,
The power generation unit (1),
It is installed on the upper side of the container 11 and further includes a wind power generation unit 13 for generating power through wind power, wherein the charge/discharge module 16 stores the power generated by the wind power generation module 13 in the storage device. (14) or configured to apply to the first inverter (15a),
A generator 31 for generating electric power through a prime mover, a conversion module 32 for converting the electric power produced by the generator 31 into DC power, and the generator 31 according to a control signal connected to the connection line an auxiliary unit (3) having a linker (33) for driving and linking the produced and converted DC power to the power line (21); Renewable energy multiple linkage type power supply system, characterized in that it further comprises.
delete According to claim 1,
The container 11 is
Provided with an insulating wall, the compartment 111 in which the storage device 14 is accommodated and a heating and cooling device 112 for controlling the temperature inside the compartment using a thermoelectric element, and monitoring the fire inside the compartment 111, Renewable energy multiple linkage type power supply system, characterized in that it further comprises a fire extinguishing device 113 for performing fire extinguishing work in case of fire.

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