KR101729499B1 - System and method for exploiting solar energy generation considering electric charges - Google Patents

Abstract

A system for utilizing photovoltaic power in consideration of electric power rates and a method thereof are disclosed. The present invention comprises: a photovoltaic module for generating electricity by performing photovoltaic generation; a photovoltaic cell module in which electric power generated in the photovoltaic module is stored and output; a voltage sensor for measuring a voltage of the photovoltaic cell module; an inverter for converting the electric power output from the photovoltaic cell module into an alternating current, and outputting the alternating current; a switch for selecting either electric power output from the inverter or electric power output from a commercial power supply, and supplying the electric power to the load; and a switching control server for automatically selecting either electric power output from the inverter or electric power output from the commercial power supply according to a predetermined algorithm and controlling the switch. According to the system for utilizing photovoltaic power in consideration of electric power rates and a method thereof, the electric power rates can be minimized by using the photovoltaic power, of which generation amount is not sufficient, when the electricity prices are the most expensive.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and a method for utilizing photovoltaic power generation,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photovoltaic power generation system, and more particularly, to a photovoltaic power generation utilization system and method considering power charges.

Solar power generation is an eco-friendly energy generation method, and it is a very useful way of producing electricity through the sunlight that can be obtained naturally.

However, photovoltaic power generation is still mainly used as a means to support general commercial power sources. This is due to the fact that the weather or daily dose is very variable and also limits the capacity and technology of the solar cell to some extent.

Therefore, it is necessary to utilize the power as an optimal operating method by appropriately utilizing commercial power and solar power.

In the case of commercial power, charges vary according to the time of day, divided into light load time, intermediate load time, and peak load time.

There is a need for a smart power usage algorithm that mixes solar power so that an optimal charge is obtained according to the hourly charge of such commercial power.

10-1539998 10-1492528

It is an object of the present invention to provide a photovoltaic power generation utilizing system considering electric power charges.

It is another object of the present invention to provide a method of utilizing photovoltaic power generation in consideration of electric power charges.

The solar power generation utilizing system considering the electric power charges according to the object of the present invention may include a solar power generation module for generating solar power and generating electric power; A solar cell module in which electric power generated by the solar cell module is stored and output; A voltage sensor for measuring a voltage of the solar cell module; An inverter for converting the power output from the solar cell module into an alternating current; A switch for selecting one of the power output from the inverter and the power of the commercial power supply and supplying the power to the load; And a switching control server for automatically selecting either power output from the inverter or power to the commercial power supply according to a predetermined algorithm to control the switch.

Here, the switching control server may be configured to automatically select either the inverter or the commercial power supply according to the power hour period for which the power rate is set to a different day, so as to control the switch.

The switching control server may be configured to automatically select either the inverter or the commercial power supply by considering the voltage of the solar cell module measured by the voltage sensor.

The switching control server may be configured to preferentially select the inverter from the power billing time zone of the highest power rate in consideration of the voltage of the solar cell module to control the switch.

The voltage sensor includes an operational amplifier (OP) connected to both ends of the photovoltaic power generation module so as to detect voltages at both ends of the photovoltaic power generation module, and a radio wave propagating between the photovoltaic power generation module and the operational amplifier And the rectifier bridge BR. The operational amplifier OP may be configured such that two input terminals are connected to the full wave rectifying bridge BR.

According to another aspect of the present invention, there is provided a method of utilizing photovoltaic generation in consideration of electric power charges, the method comprising: generating photovoltaic power generation by solar photovoltaic generation; Storing and outputting electric power produced by the solar cell module in a solar cell module; Measuring a voltage of the solar cell module by a voltage sensor; Converting an electric power output from the solar cell module into an alternating current and outputting the alternating current; Controlling the switch by the switching control server automatically selecting either the power output by the inverter or the power to the commercial power supply according to a predetermined algorithm; And the switch may be configured to select either the power output from the inverter or the power from the commercial power supply under the control of the switching control server and supply the selected power to the load.

Here, the switching control server may automatically select one of the power output by the inverter and the power to the commercial power supply according to a predetermined algorithm to control the switch, And may be configured to automatically select either the inverter or the commercial power supply according to a time zone to control the switch.

The switching control server may be configured to automatically select one of power output by the inverter and power to the commercial power supply according to a predetermined algorithm to control the switch, And the switch may be controlled by automatically selecting either the inverter or the commercial power supply in consideration of the voltage of the module.

The switching control server automatically selects one of power output from the inverter and power to the commercial power according to a predetermined algorithm to control the switch, And may be configured to preferentially select the inverter from the power rate time zone of the power rate to control the switch.

According to the solar power generation utilization system and method considering the above electric power charges, it is possible to minimize the electric power charge by using the solar power generation amount which is not sufficient at the time of the highest charge.

Furthermore, it is possible to determine the power consumption time period of recent days, to perform the switching control so that the lowest power rate can be obtained in consideration of the power consumption time period and the power rate per time period, There is an effect that can be optimized even in the case of the change of.

1 is a block diagram of a solar power generation utilizing system in consideration of a power charge according to an embodiment of the present invention.
2 is a circuit diagram of a voltage sensor according to an embodiment of the present invention.
FIG. 3 is a flowchart of a method of utilizing photovoltaic power generation in consideration of electric power charges according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail to the concrete inventive concept. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a solar power generation utilizing system in consideration of a power charge according to an embodiment of the present invention.

Referring to FIG. 1, a solar power generation utilizing system 100 considering a power charge according to an embodiment of the present invention includes a solar power generation module 110, a solar cell module 120, a voltage sensor 130, an inverter an inverter 140, a switch 150, a real-time power consumption measurement module 160, a time-based power consumption database 170, and a switching control server 180.

The photovoltaic power generation utilizing system 100 considering the electric power charge calculates the available electric energy by measuring the voltage of the solar cell module 120 and considers the charges of the light load time period, the intermediate load time period and the maximum load time period of KEPAC during the day So that the power of the solar cell module 120 is used first in preference to the most expensive time zone, and when the power of the solar cell module 120 is short, automatic switching control is performed so as to use the power of the commercial power source.

Hereinafter, the detailed configuration will be described.

The solar power generation module 110 may be configured to perform solar power generation to produce power.

The solar cell module 120 may be configured to store and output the electric power generated by the solar cell module 110.

Photovoltaic power generation is possible during the daytime, and the power generation amount varies depending on the weather or the amount of sunshine, so it is necessary to charge the solar cell module 120 in advance.

The voltage sensor 130 may be configured to measure the voltage of the solar cell module 120.

The voltage sensor 130 may be connected to the solar cell module 120 in parallel to measure the voltage in real time.

The inverter 140 may be configured to convert the power output from the solar cell module 120 into AC and output it to the load. This is because the load is supplied with AC power as well as AC power supplied from commercial power.

The switch 150 may be configured to select one of the power output by the inverter 130 and the power of the commercial power supply to supply to the load. The switch 150 may be configured to perform a switching operation under the control of the switching control server 180.

The real-time power consumption measurement module 160 may be configured to measure the real-time power consumption that is supplied to the load through the switch 150 to be consumed.

The real-time power consumption measured by the real-time power consumption measurement module 160 may be configured to be stored in real time in the power consumption database 170 by time slot.

The time-scale power consumption database 170 may be configured to store the real-time power consumption measured by the real-time power consumption measurement module 160 by date and time. This real time power consumption by date and time can be used to optimize the switching control timing of the switching control server 180. [

For example, there may be times when the office, the factory, or the home are each powered primarily by power, which may or may not coincide with the peak load time, mid-load time, or peak load time.

It is possible to calculate at which time the solar energy is used at the rate of each load time period and the time when mainly using electric power, the electric power charge is minimized. For example, if power is used in very short periods of time, mostly at mid-load time, and most of the time at most times of peak load time, with very little power at peak load time, And may be configured to control switching to use solar energy for a certain period of time.

This is closely related to the amount of solar energy available at present, and can be used to calculate the switching timing by further taking this into consideration.

The switching control server 180 may be configured to automatically select one of the power output by the inverter 140 or the power to the utility power according to a predetermined algorithm to control the switch 150. [

The switching control server 180 may be configured to automatically select either the inverter 140 or the commercial power supply according to the power hourly time zone with different power rates during the day to control the switch 150.

It is possible to use the power of the solar cell module 120 as much as possible in the maximum load time period in which the rate of the commercial power source is highest during the day and to use the power of the commercial power source in the light load time period with the lowest rate.

The switching control server 180 automatically selects one of the inverter 140 or the commercial power supply by considering the voltage of the solar cell module 120 measured by the voltage sensor 130 to control the switch 150 .

When the rated current amount outputted from the solar cell module 120 is determined, only the voltage is measured by the voltage sensor 130, the charged power amount can be calculated.

And may be configured to allocate the use time first in the maximum load time period through the charged electric power amount of the solar cell module 120, and to control the use time in the intermediate load time period if remaining.

That is, the switching control server 180 may be configured to preferentially select the inverter 140 from the power rate time zone of the highest power rate in consideration of the voltage of the solar cell module 120 to control the switch 150.

As described above, the switching control server 180 calculates the optimum switching timing by considering the power consumption pattern of the power consumption database 170 for each time period measured by the real-time power consumption measurement module 160 Lt; / RTI >

The power consumption pattern may be changed according to a user's life pattern or a change in the season. The power consumption pattern may be configured to calculate the switching timing that minimizes the power charge according to the power consumption pattern that varies depending on various factors. Since the power consumption pattern for each time slot is recorded in the power consumption amount database 170 for each time slot, the switching timing can be calculated based on the power consumption pattern in recent days.

In addition, the optimum amount of power consumption pattern expected every day can be calculated by considering the amount of available power stored in the solar cell module 120 in addition to the power consumption pattern. For example, in the case of a recent power consumption pattern, in spite of the fact that there is almost no power consumption at the maximum load time, in case of consuming the solar energy in the middle load time period in preparation for the power consumption at the maximum load time Rather, electricity rates may be higher. Therefore, in such a case, it is reasonable to perform switching control so as to consume the solar energy at the intermediate load time.

These rate calculation algorithms can vary.

In particular, when the power consumption pattern of one year or more is recorded, the power consumption pattern for each season can be grasped. Therefore, the switching control server 180 may be configured to perform the switching control by considering the power consumption pattern according to the seasonal change in advance.

2 is a circuit diagram of a voltage sensor according to an embodiment of the present invention.

Referring to FIG. 2, a detailed circuit of the voltage sensor 130 is disclosed.

The voltage sensor 130 may be configured to include an operational amplifier OP connected to both ends of the photovoltaic power generation module 110 so as to detect voltages at both ends of the photovoltaic generation module 110.

That is, the operational amplifier OP is connected to sense the input voltage and the output voltage in a time-division manner. 2, a full wave rectifying bridge BR is provided between the solar power generating module 110 and the operational amplifier OP and two inputs are connected to the full wave rectifying bridge BR of the operational amplifier OP.

FIG. 3 is a flowchart of a method of utilizing photovoltaic power generation in consideration of electric power charges according to an embodiment of the present invention.

Referring to FIG. 3, the solar power generation module 110 performs solar power generation to produce power (S101).

Next, the power generated by the solar cell module 110 is stored and output to the solar cell module 120 (S102).

Next, the voltage sensor 130 measures the voltage of the solar cell module 110 (S103).

Next, the inverter 140 converts the power output from the solar cell module 130 to AC and outputs it (S104).

Next, the switching control server 180 automatically selects one of the power output from the inverter 140 and the power to the commercial power supply 10 according to a predetermined algorithm, (S105).

At this time, the switching control server 180 may be configured to automatically select either the inverter 140 or the commercial power source 10 according to the power charge time zone determined with a different power rate during the day to control the switch 150.

The switching control server 180 automatically selects one of the inverter 140 or the commercial power supply 10 by taking the voltage of the solar cell module 120 measured by the voltage sensor 130 into account, As shown in FIG.

And to control the switch 150 by preferentially selecting the inverter 140 from the power rate time zone of the highest power rate in consideration of the voltage of the solar cell module 120. [

Next, the switch 150 selects any one of the power output from the inverter 140 or the power from the commercial power supply 10 under the control of the switching control server 180 (S106).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims. There will be.

110: solar power generation module 120: solar cell module
130: Voltage sensor 140: Inverter
150: Switch 160: Real-time power consumption measurement module
170: Power consumption database by time
180: Switching control server

Claims (9)

A photovoltaic power generating module 110 for performing photovoltaic power generation to generate electric power;
A solar cell module 120 for storing and outputting power generated by the solar cell module 110;
A voltage sensor 130 for measuring a voltage of the solar cell module 120;
An inverter 140 for converting the electric power output from the solar cell module 120 into an alternating current;
A switch 150 for selecting one of the power output from the inverter 140 and the power from the commercial power supply and supplying the power to the load;
And a switching control server (180) for automatically selecting either power output from the inverter (140) or power to the commercial power supply according to a predetermined algorithm to control the switch (150)
A real time power consumption measurement module 160 for measuring a real time power consumption amount supplied to the load through the switch 150 and consumed;
And a power consumption database (170) for each time period in which the real time power consumption measured by the real time power consumption measurement module (160) is stored by date and time,
The real time power consumption by date and time is used to optimize the switching control timing of the switching control server 180,
The switching control server 180,
And the switch 150 is controlled by automatically selecting either the inverter 140 or the commercial power supply in consideration of the voltage of the solar cell module 120 measured by the voltage sensor 130,
The voltage sensor (130)
An operational amplifier OP connected to both ends of the photovoltaic generation module 110 so as to detect voltages at both ends of the photovoltaic power generation module 110 and an operational amplifier OP connected to the photovoltaic generation module 110 and an operational amplifier OP The operational amplifier OP is connected to the full wave rectifying bridge BR so that two input terminals are connected to the full wave rectifying bridge BR,
The switching control server 180 is configured to calculate the optimal switching timing in consideration of the power consumption pattern measured by the real time power consumption measurement module 160 and stored in the power consumption amount database 170 by time slot Photovoltaic power utilization system considering electricity tariff.
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