KR200360972Y1 - Appratus for storaging of midnight electric power - Google Patents

Abstract

The present invention relates to a device for accumulating late-night power, which enables the user to economically utilize energy resources and make efficient use of energy resources by accumulating late-night surplus power in a power supply system and selectively using it during the day. Always / night power meter to measure the amount of usage divided by the regular power and midnight power; Supply line conversion device for converting the power supply line to enable the selective use of the regular power and the midnight power; Comprising the power storage device, An electrical energy storage unit for converting and storing the power supplied through the supply line conversion device by DC conversion and selectively converting the stored power by AC conversion; a storage capacity detection sensor detecting a charge and discharge state of the power storage device; the storage capacity detection The supply line converter is controlled according to the detection result of the sensor. It is made and a control unit for varying a supply line of the power.

Description

Apparatus for storaging of midnight electric power

The present invention relates to a power supply system, and more particularly, to a device for accumulating and using a late night power, which enables the user to economically use energy resources and make efficient use of energy resources by accumulating the late night surplus power and selectively using it during the day. .

If you want to receive power at night in public institutions, factories, and homes, users use late-night power. Late-night power is discounted by a different rate system than regular power.

Accordingly, a hot air fan, a cooler, a heat accumulator, and the like are operated in a public institution or a factory by using midnight electric power to provide air conditioning and heating facilities at low cost.

Hereinafter, a description will be given of the late night power use and power storage system of the prior art.

Currently, midnight electric power devices are limited to power and heating devices and electric water heaters that have heat storage and heat storage functions, and most of them use water as a medium for heat storage and heat storage. I use it.

In addition to the direct use of the late-night power, research and development on a power storage system that stores the surplus late-night power and then regenerates and uses it during the peak power demand period continue.

The current electric power storage system has a method of storing electric energy as heat by a power device having heat storage and cooling function and a method of storing electric energy as kinetic energy by a positive power generation method.

However, in the prior art, the method of accumulating the late-night surplus power by the positive power generation method converts the surplus power in the late-night time zone into the kinetic energy through the positive pumping and then converts the kinetic energy into electric energy during the peak power demand during the day. There are problems such as low efficiency, high cost required for installation, and limited installation site.

In addition, the method of storing electrical energy as heat by a power device having heat storage and cooling function uses water as heat storage and heat storage medium, so the installation of a large heat storage tank is essential, and the appearance of the device is too large for the heat storage and heat storage effect. There is a problem that the installation space is severely limited, and the overall energy regeneration efficiency does not reach the method of pumping power generation.

In addition, by accumulating electrical energy as thermal energy it is greatly affected by the seasonal external temperature.

In other words, in the case of heat or cold, the energy regeneration efficiency is rather reduced, so that the cooling and heating are not completely performed only by the accumulated energy. There is a lot.

The present invention is to solve the problems such as the limitation of the installation site of the prior art power storage system, the efficiency of energy regeneration, the constraints caused by the external environment changes, the accumulation of late-night surplus power in the power supply system and the day time It is an object of the present invention to provide a device for accumulating and using the late-night power, which can be selectively used in order to enable the economic benefit of the user and the efficient use of energy resources.

1 is a configuration diagram of a device for accumulating late-night power according to the present invention;

Explanation of symbols for the main parts of the drawings

10. Constant electricity meter 11. Midnight electricity meter

12. Supply line converter 13. Control unit

14. AC / DC converter 15. Power storage device

16. DC / AC converter 17. Storage capacity detection sensor

The device for accumulating and using the midnight power according to the present invention for achieving the above object is a constant / night power wattmeter for measuring the amount of power divided into a continuous power and a midnight power; An electrical energy storage unit including and including the power storage device, configured to perform DC conversion to store power supplied through the supply line conversion device and to selectively convert the stored power into AC; A storage capacity detection sensor detecting a charging and discharging state of the power storage device; and controlling a supply line conversion device according to a detection result of the storage capacity detection sensor to vary a power supply line.

Here, the control unit controls the supply line conversion device so that the power supply through the late-night electricity meter to the electrical energy storage unit and at the same time to be supplied at the same time through the normal late-night power usage line.

The controller detects the storage state of the electrical energy storage unit, and when the charging of the electrical energy storage unit is completed, the control unit cuts off the line connected to the electrical energy storage unit, and controls the supply line conversion device so that the power is supplied only through the normal night power line. Characterized in that.

The controller may control the supply line conversion device to supply power stored in the electric energy storage unit first at a time of constant power use, and to supply power through a constant electricity meter when discharge is performed to a predetermined level.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of the embodiments.

Referring to the accompanying drawings, a preferred embodiment of a device for accumulating and using midnight power according to the present invention will be described below.

1 is a block diagram of a device for accumulating and using late night power according to the present invention.

The present invention provides a storage device that can accumulate late-night power that is supplied at a lower cost than regular power, and provides a control means that can use the power stored in the storage device instead of the regular power during the daytime.

The midnight power storage device of the present invention has a power storage system that is less constrained at the installation site when installed, surpasses the positive power generation method in total energy regeneration efficiency, and the accumulated energy is not restricted by external environment changes such as seasonal temperature changes. To implement.

As shown in FIG. 1, the midnight power meter 10 and the constant power meter 11 configured on the input side of the AC power supply (typically down-transformed to 220V) supplied to the general home from KEPCO through the switchboard to measure the usage amount 11 ), A supply line converting device 12 for converting a power supply line so that selective use of the regular power and the midnight power is possible, and the supply line converting device 12 to control the regular power use time zone and the late night power use time zone And a control unit 13 for changing a supply line according to a change in power storage capacity of the power storage device 15, and an AC / DC conversion device 14 for converting late-night power supplied by control of the control unit 13 to direct current. And a power storage device 15 for storing DC-converted power, a DC / AC converter 16 for converting and storing the stored DC power into AC power, and a storage capacity of the power storage device 15. Control unit 17 It is included, and configuring the output storage capacitance detecting sensor 17 for.

The AC / DC converter 14, the power storage device 15, and the DC / AC converter may be grouped into one block and divided into an electric energy storage device.

Here, the late-night electricity meter 10 and the regular electricity meter 11 is an electronic electricity meter having a memory for storing the metering data such as the amount of power used, the maximum demand power.

The memory used includes nonvolatile memory such as ROM (Read Only Memory), flash memory, etc., and has a display window for displaying the result of calculating the amount of power.

In addition, the timer has a timer to distinguish between the night time power consumption time zone and the regular power use time zone. The timer function uses a line frequency (RT) and a real time clock (RTC). How to implement

Then, the control unit 13 controls the supply line conversion device 12 according to the detection result of the storage capacity detection sensor 17 to store power in the power storage device 15 by using the late night surplus power, or to use or low the late night power. The power of the power storage device of the time zone is made available.

In the apparatus for accumulating and using the midnight electric power according to the present invention as described above, the power supply line is controlled as follows according to the condition of power storage and power usage.

First, in the midnight power use time (22 o'clock to 8 o'clock), the power of the track (A) supplied through the late night electricity meter 10 is supplied to the track of (C) and the power is accumulated through the track (C). And (d) to enable the use of conventional midnight power through the track.

In this state, when the electric power is accumulated using the (C) line and the storage capacity detection sensor 17 determines that the charging of the electrical storage device 15 is completed, the (C) line is closed and the (D) line is normally Ensure that midnight power is supplied.

At the time of regular power usage (08:00 to 22:00), once all of the (C) (D) lines are closed, the power stored in the power storage device 15 is supplied to the electric appliances in the home through the DC / AC converter 16. Be sure to

Here, in addition to the DC / AC conversion, an up-trans step is performed to increase the voltage to the rated voltage level.

As such, when the night-time surplus power is accumulated and used during the daytime period, the use of power increases rapidly, or when the power storage device 15 discharges below the reference level, it is supplied through the constant electricity meter 11 (b) (D) The supply line converting apparatus 12 is controlled so that the electric power of the line is supplied to the electric appliances in the home through the line.

At this time, the discharge of the electrical storage device 15, that is, the supply of power from the electrical storage device 15 is cut off under the control of the control unit 13.

As described above, when the power storage device 15 discharged to the reference level or less reaches the midnight power use time period, the power storage device 15 is controlled to be supplied to the electric equipment in the home preferentially during the normal power use time period on the next day.

In addition, the power storage device 15 may use a quasi-constant voltage charging method that controls a charge amount by catching a voltage in which the charging voltage rises sharply to prevent an overcharge or catching a current drop in which the charge current drops vertically. Only 70 to 80% of the discharge capacity is limited to discharge.

The apparatus for accumulating late-night power according to the present invention can directly accumulate the late-night surplus power in a power storage device such as a battery in a power supply system and selectively use it during the daytime, thereby enabling the user to use economic benefits and efficient use of energy resources. Has the effect of

The aspects of efficient use of energy resources are as follows.

A typical system for using midnight power is to allow electric energy to be supplied to specific electric equipments that have been approved by KEPCO at specific times, and may consume energy unnecessarily without considering the operating time according to the load. .

For example, due to the load characteristics, the maximum heat generation time is sufficient for 5 to 6 hours for the regenerative heating fan, but excessive energy is obtained by continuously repeating the heat storage and natural heat dissipation using all of the contracted power during the entire night time (about 10 hours). Brought consumption.

In addition, unnecessary power was wasted by being supplied with midnight electricity during the holidays or non-working periods without the need to operate the load.In order to solve this problem, the user directly controls the midnight power supply timeline to adjust the time zone. There was a problem to operate the breaker of each operation.

However, the device for using the late night power accumulation of the present invention does not continuously supply the remaining electric power to the electric device and consumes the surplus power remaining after the late night power is supplied to the general night electric power device using the late night electric power. You can solve the problem.

In addition, since the electric energy stored in the electrical storage device is used instead of the expensive regular power during the daytime, it is possible to use the energy efficiently.

From the above description, those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be determined by the scope of the utility model registration request.

Such a device for accumulating late-night power according to the present invention has the following effects.

First, the present invention provides a storage device that can accumulate late-night power that is supplied at a lower price than the regular power, and enables the efficient use of energy by allowing the power stored in the storage device to be used instead of the regular power during the daytime. Do it.

Secondly, the midnight power storage device of the present invention is less constrained at the installation site when installed, surpasses the two-way power generation system in total energy regeneration efficiency, and the accumulated energy is not restricted by changes in the external environment such as seasonal temperature change. It has the effect of implementing a storage system.

Third, since the electric energy stored in the power storage device is used instead of expensive regular power during the daytime, the economic burden on the consumer is reduced.

Claims (4)

A regular / nighttime power meter for dividing the power supplied into regular power and midnight power to measure usage; A supply line conversion device for converting a power supply line to allow the selective use of the regular power and the midnight power; An electric energy storage unit including the power storage device, configured to perform DC conversion to store power supplied through a supply line conversion device and to selectively convert AC from the stored power; A storage capacity detection sensor detecting a charging and discharging state of the power storage device; And a control unit for controlling a supply line conversion device according to a detection result of the storage capacity detection sensor to vary the supply line of electric power. The apparatus of claim 1, wherein the control unit controls the supply line conversion device such that power through the late-night electricity meter is simultaneously supplied through a line connecting the electric energy storage unit and a normal night-time power usage line at the time of the midnight power use. Device used for the accumulation of late night power. According to claim 1 or claim 2, When the storage state of the electrical energy storage unit is detected and the charging of the electrical energy storage unit is completed, the control unit cuts off the line connected to the electrical energy storage unit, the power supply only through a conventional midnight power use line A device for accumulating late-night power, characterized in that the supply line conversion device is controlled so that the supply line is supplied. The apparatus of claim 1, wherein the controller controls the supply line conversion device to supply power stored in the electrical energy storage unit at the time of regular power usage and to supply power through the constant electricity meter when discharge is performed to a predetermined level. Device used to accumulate late night power.