KR20210108000A - Testbed System for microgrid wireless power with dordless - Google Patents

Abstract

Disclosed is a microgrid wireless power cordless testbed system. According to the present invention, the microgrid wireless power cordless testbed system comprises: a wireless testbed panel; a control unit controlling DC LOAD for energy monitoring and VR usage of each appliance; a battery and an inverter installed in a separate location and supplying power; and a driving mode board provided with a control panel that can be controlled according to user selection.

Description

Microgrid wireless power cordless testbed system {Testbed System for microgrid wireless power with dordless}

The present invention relates to a microgrid wireless power cordless testbed system.

Microgrid is a power supply network that can be self-sufficient in power supply and demand in small areas independent of the existing power grid.

In addition, a plurality of microgrids may be formed, and accordingly, a system for managing the multi-microgrid is required. In a multi-microgrid environment, cooperation between microgrids can more efficiently support energy services provided in a single microgrid environment.

In the existing demand response mechanism, in order to stabilize the power supply and demand of the power grid, the power company may request to participate in demand response with respect to the load resources in the microgrid. By reducing the power of the load resources in the microgrid, the load reduction to meet this request is performed. The utility provides a certain amount of incentive for this load reduction.

However, failure to respond to such a promised request will result in a penalty far exceeding the incentives generally provided for fulfilling the promise.

Therefore, it is necessary for the microgrid to make a pre-promised request for load reduction.

Meanwhile, in relation to wireless power transmission, an example thereof is as follows.

With the renewed interest in electric vehicles, we have seen many new developments in wireless power transfer, fast charging technology and battery technology as a convenient way to recharge batteries. Wireless fast charging technologies are more relevant to purely electric vehicles as a way to alleviate the limited range offered by current battery technology. In this way the batteries can be recharged while driving on the road, at a traffic light, in a parking lot while shopping, or from an embedded coil in a drive-in.

Wireless power transfer has a long history, probably starting with Tesla. The technology is now ubiquitous, from toothbrushes, cell phones, laptops, and is even considered for general use at home, such as lamps, watches and the like. In most applications, wireless power transfer is used for battery charging and as temporary energy storage between the wireless charging system and the device. With the advent of better battery technologies, such as lithium-ion cells, it becomes possible to charge batteries much faster than ever before, and to do so with wireless fast chargers. To achieve general acceptance, these wireless fast chargers need to be more efficient and powerful, which is the focus of some of the applications discussed herein.

There are many types of wireless power transfer. This disclosure focuses on Resonant Induction Charging (RIC), although much of what is described also applies to other types of wireless charging methods.

As the name implies, RIC uses high-Q tuned coils and capacitors, and power is transmitted from coil to coil through a magnetic field.

RIC can only be used within a fraction of a wavelength when using RIC and far-field technologies, including very high frequency RF fields, which require, for example, sophisticated electronics. It works, unlike near-field technologies.

With RIC, significantly more power can be transmitted over distances exceeding a few coil diameters with the coils. Using magnetic fields rather than radiating electromagnetic fields also presents fewer potential health risks.

A common type of coil used in RIC is a pancake coil with a single spiral winding arranged in a plane.

The circuit diagram of FIG. 1 shows a typical circuit used in a RIC, where coils L1 and L2 may each be a transmit and receive coil, made of a pancake coil.

As in the case of a transformer, the electrical properties of the coils can be described as coil resistance, self-inductance and mutual inductance.

Mutual inductance relates to how much of the field produced by one coil traverses the other coil(s), which is highly related to the geometry of how the coils are oriented relative to each other, including distance and direction. do.

As the coupling decreases, less power is transferred while the power loss in joule heating is the same or increases, thus reducing efficiency.

KR 10-2015-7019449 (2013.12.16)

The present invention is a smart solar environmental monitoring system, a solar robot system, a solar street light, a toy/toy wireless charger, a power tool, and a mobile induction as a utilization method through the microgrid wireless power cordless test bed system. have.

A microgrid wireless power cordless testbed system is introduced.

To this end, the present invention provides a microgrid wireless power cordless test bed system, comprising: a wireless power test bed panel; DC LOAD for energy monitoring, a control unit for controlling VR usage of each home appliance; batteries and inverters installed in separate locations to supply power; It includes an operation mode board provided with a control panel that can be controlled according to a user's selection.

According to the present invention having the above configuration, 1) it is possible to increase the transmission efficiency of the wireless power transmission system by generating and using a dynamic system model to detect whether the receiving coil is near the transmitting coil, and 2) already described As described above, it can be used for smart solar environmental monitoring system, solar robot system, solar street light, toy/toy wireless charger, power tool and mobile induction, etc. 3) The wireless power transmitter and its operation method according to the embodiment are wireless power receiver can perform fast wireless charging, 4) the wireless power transmitter and its operating method according to the embodiment can adaptively change the charging mode according to the state and demand of the wireless power receiver, and 5) according to the embodiment The wireless power transmitter and its operating method can prevent charging interruption during high-speed wireless charging, and 6) the wireless power transmitter and its operating method according to the embodiment can be charged in a wide charging area even if the wireless power transmitter and its operating method are changed to fast wireless charging, 7) The wireless power transmitter and the method of operation thereof according to the embodiment are implemented with various effects such as preventing overvoltage that occurs when controlling power based on a control error packet in high-speed wireless charging.

1 shows a typical circuit used in a RIC in a circuit diagram;
2 is a circuit diagram of wireless power transmission and reception, which is a known technology to help the understanding of the present invention;
3 is a photograph showing a transmitting unit and a receiving unit at the center of the actual substrate;
4 is an overall configuration diagram of the present invention, a schematic diagram of microgrid energy storage and grid-connected power transmission;
5 is a schematic diagram of a wireless power cordless test bed used in a wireless electric vehicle;
6 is a control operation and load variable design that is one component of the present invention;
7 is a microgrid energy storage circuit diagram that is one component of the present invention, of which LTC3652 applied SOLAR CHARGER is shown;
8 shows MPPT capable 18V/12V/9V according to pin 2 Vin of LTC3652,
9 shows a TP5000 applied Battery Charger in system power charging,
10 shows Li Battery Protection applied to DW06D in lithium polymer / lithium ion battery application,
11 is a diagram showing a wireless charging receiver module applied to BQ51020 in a wireless power cordless circuit diagram.
12 is a picture of an actual configuration for performing a charging test by wireless power in a vehicle.
13 is a schematic diagram of the entire energy monitoring including the degree of charging of an electric vehicle.
14 is a wireless power transmission PCB and FIG. 15 is a wireless power reception PCB.
16 is a microgrid energy storage PCB.
17 is an overall configuration diagram of the microgrid house, and FIG. 18 is an overall configuration diagram in which a control operation unit and a load variable unit are installed.

Hereinafter, a preferred embodiment of a microgrid wireless power cordless testbed system according to the present invention will be described with reference to the accompanying drawings.

2 is a circuit diagram of wireless power transmission and reception, which is a known technology to help understand the present invention, and FIG. 3 is a photograph showing a transmitter and a receiver at the center of an actual substrate.

The wireless power transmission method is briefly described as follows.

Portable terminals such as mobile phones and notebook computers include a battery for storing power and a circuit for charging and discharging the battery. In order to charge the battery of such a terminal, power must be supplied from an external charger.

In general, as an example of an electrical connection method between a charging device and a battery for charging power to a battery, a terminal that receives commercial power, converts it into voltage and current corresponding to the battery, and supplies electrical energy to the battery through the terminal of the battery supply method. This terminal supply method is accompanied by the use of a physical cable or wire. Therefore, when handling a lot of terminal-supply type equipment, many cables occupy a considerable work space, are difficult to organize, and are not good in appearance. In addition, the terminal supply method may cause problems such as instantaneous discharge caused by different potential differences between terminals, burnout and fire caused by foreign substances, natural discharge, and deterioration of battery life and performance.

Recently, in order to solve such a problem, a charging system (hereinafter referred to as a “wireless charging system”) and control methods using a method of wirelessly transmitting power have been proposed. In addition, the demand for a wireless charging system was low because the wireless charging system was not installed in some portable terminals by default in the past and consumers had to purchase a separate wireless charging receiver accessory separately. It is expected that the wireless charging function will be installed as standard.

In general, a wireless charging system is composed of a wireless power transmitter for supplying electrical energy through a wireless power transmission method and a wireless power receiver for charging a battery by receiving electrical energy supplied from the wireless power transmitter.

Such a wireless charging system may transmit power by at least one wireless power transmission method (eg, electromagnetic induction method, electromagnetic resonance method, RF wireless power transmission method, etc.).

As an example, the wireless power transmission method generates a magnetic field in the power transmitter coil and charges using the electromagnetic induction principle in which electricity is induced in the receiver coil under the influence of the magnetic field. Various wireless power transmission standards based on the electromagnetic induction method can be used. . Here, the electromagnetic induction type wireless power transmission standard may include an electromagnetic induction type wireless charging technology defined by Wireless Power Consortium (WPC) and/or Power Matters Alliance (PMA).

As another example, in the wireless power transmission method, an electromagnetic resonance method in which a magnetic field generated by a transmission coil of a wireless power transmitter is tuned to a specific resonant frequency to transmit power to a wireless power receiver located in a short distance may be used. . Here, the electromagnetic resonance method may include a resonance type wireless charging technology defined in the A4WP (Alliance for Wireless Power) standard organization, which is a wireless charging technology standard organization.

As another example, the wireless power transmission method may be a RF wireless power transmission method in which low-power energy is loaded into an RF signal to transmit power to a wireless power receiver located at a distance.

On the other hand, a high-speed wireless charging technology equivalent to the time of wired charging using an existing cable has been proposed. However, the conventional high-speed wireless charging technology starts performing fast charging, and overvoltage may occur during a transient period.

4 is an overall configuration diagram of the present invention, a schematic diagram of microgrid energy storage and grid-connected power transmission, FIG. 5 is a schematic diagram of a wireless power cordless test bed used in a wireless electric vehicle, and FIG. 6 is a component of the present invention It is a design diagram of phosphorus control operation and load variable.

7 is a microgrid energy storage circuit diagram that is one component of the present invention, and among them, LTC3652 applied SOLAR CHARGER is shown.

8 shows MPPT capable 18V/12V/9V according to pin 2 Vin of LTC3652.

9 shows a TP5000 applied battery charger in system power charging.

10 shows Li Battery Protection applied to DW06D in lithium polymer/lithium ion battery application.

11 shows a wireless charging receiver module applied to BQ51020 in a wireless power cordless circuit diagram.

Meanwhile, FIG. 12 is an actual configuration photograph for performing a charging test by wireless power in a vehicle, and FIG. 13 is a schematic diagram of the entire energy monitoring including electric vehicle charging degree.

It will be briefly described with reference to FIGS. 12 and 13 as follows.

First, the energy monitoring system will be described as follows.

1) The current of DC LOAD displays the used load current, and the power displays the used power.

2) Washing machine, air conditioner, electric vehicle charging - Usage is controlled by external VR, and when each VR usage is controlled, the LED light inside the house turns on, and 3 LED lamps (washing machine, air conditioner, electric vehicle) inside the house are built-in.

Next, a description of the battery is as follows.

1) Solar cells are installed at the back of the house to charge the battery or connect to KEPCO by means of solar cells, 2) LAMP CONTROL VR on the external nameplate is a virtual solar light source with halogen that replaces sunlight, 3) Charging and switching mode In the case of the charging mode, when the battery voltage is low, the charging mode is switched to the charging mode.

Next, the inverter will be described as follows.

1) When grid-connected with KEPCO, the current and power are displayed, and 2) If the amount of power is displayed as -10W, the power produced by the solar cell is supplied to KEPCO (grid-connected mode).

The operation mode will be described as follows.

1) Turn on MCCB1 and MCCB2 installed in the front.

MCCB1 is the system power supply, meta power, and MCCB2 is the grid-connected inverter power supply.

2) Turn the external nameplate Lamp Control clockwise to charge the battery and proceed with the connection mode.

3) When the external nameplate START PB is pressed, the power of all systems is turned on.

Press once more to turn off the power of all systems.

4) In the case of the solar test bed section, turn on the car power, place it under the halogen lamp behind the house, and the car is operated by sunlight.

5) In the case of the wireless power transmission test bed section, the car is operated as the wireless power transmission test bed after passing the solar-powered section.

Meanwhile, FIG. 14 is a wireless power transmission PCB and FIG. 15 is a wireless power reception PCB.

16 is a microgrid energy storage PCB.

17 is an overall configuration diagram of a microgriddy house, and FIG. 18 is an overall configuration diagram in which a control operation unit and a load variable unit are installed.

Claims (1)

In the microgrid wireless power cordless test bed system,
wireless power test bed panel;
DC LOAD for energy monitoring, a control unit for controlling VR usage of each home appliance;
batteries and inverters installed in separate locations to supply power;
A microgrid wireless power cordless test bed system comprising an operation mode board equipped with a control panel that can be controlled according to a user's selection.

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