KR101845166B1 - Control method of mini solar power generation system and apparatus thereof - Google Patents

Abstract

A mini solar power generation system according to an embodiment of the present invention is a mini solar power generation apparatus that produces electric energy from solar light. To analyze the power consumption form of a consumer, a voltage and a current of the system are measured, A power measuring device for calculating power consumption by using a current value, and a power measuring device for receiving the calculated power consumption, analyzing the received power consumption to analyze the power consumption pattern, And a server for transmitting a signal for controlling the photovoltaic device, wherein the mini solar photovoltaic device includes a solar cell array to which a plurality of solar cell modules for converting sunlight into electric energy are combined, An MPPT converter to convert the voltage, an inverter to convert the converted DC power from the MPPT converter to AC power, an MPPT converter A battery charging / discharging unit that charges or discharges the battery using the bucked DC power, a battery that is charged or discharged by all of the battery charging units, a communication unit and an inverter capable of network communication with the server, and a control unit that controls the battery charging / discharging unit have.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for a mini solar power generation system,

The present invention relates to a control method and apparatus for a mini solar power generation system, and more particularly, to a control method and apparatus for a mini solar power generation system in which an inverter command current And a method for controlling the same.

Industrial development to date is mainly caused by industrial and technological development due to the consumption of fossil energy, and it causes various environmental problems such as acid rain, air pollution, and so on from all over the world. Therefore, countries around the world are concentrating their efforts on the development of pollution-free new and renewable energy as a solution to this problem. Among pollution-free new and renewable energy, pollution is not generated at all, clean, mechanical vibration and noise are low, The solar power generation system is emerging as a solution.

However, there is a problem that it is difficult to apply the solar power generation system to a residential house or an apartment where a relatively small capacity is required because the solar energy conversion efficiency is not high and the initial installation cost is high.

In a small capacity (250W ~ 500W) photovoltaic power generation system for a mini solar power generation system, an apartment which is difficult to install a conventional 3KW household solar power generation system, a flat house, The difference in the amount of solar radiation differs depending on the direction and the number of floors, for example, in a daytime when the sunlight is good on the veranda, the power generation amount is maximum, but the power generation efficiency is lowered in the low- There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a mini solar power generation system which generates an inverter command current to perform a power conditioning system (PCS) and a demand side management (DSM) A control method of the system and a device therefor.

A mini solar power generation system according to an embodiment of the present invention is a mini solar power generation apparatus that produces electric energy from solar light. To analyze the power consumption form of a consumer, a voltage and a current of the system are measured, A power measuring device for calculating power consumption by using a current value, and a power measuring device for receiving the calculated power consumption, analyzing the received power consumption to analyze the power consumption pattern, And a server for transmitting a signal for controlling the photovoltaic device, wherein the mini solar photovoltaic device includes a solar cell array to which a plurality of solar cell modules for converting sunlight into electric energy are combined, An MPPT converter to convert the voltage, an inverter to convert the converted DC power from the MPPT converter to AC power, an MPPT converter A battery charging / discharging unit that charges or discharges the battery using the bucked DC power, a battery that is charged or discharged by all of the battery charging units, a communication unit and an inverter capable of network communication with the server, and a control unit that controls the battery charging / discharging unit have.

The controller according to an embodiment of the present invention may generate an inverter command current to perform a power conditioning system (PCS) and a demand side management (DSM) function according to a load condition and a battery condition.

The controller according to an embodiment of the present invention may generate a PWM switching pattern for allowing the inverter current to follow the command current according to the load condition and the battery condition.

In order to perform peak cutting or a demand side management (DSM), the server according to an exemplary embodiment of the present invention analyzes power consumption patterns of customers by day, month, season, and year, The inverter command value is calculated in accordance with the consumption mode, and the calculated command value can be transmitted to the mini solar power generation apparatus.

The server according to an embodiment of the present invention uses the analyzed power consumption type data for each day, month, season, and year to determine the average load power of the day or the day before, and then calculates a peak load to be removed And calculates the inverter command current value using the calculated peak load and transmits it to the mini solar photovoltaic generator. The controller compares the received inverter command value with the mini solar photovoltaic current so that the inverter sets the inverter output current The inverter can be controlled so as to follow the command value.

The server according to an embodiment of the present invention determines a load demand management schedule of a predetermined time period after determining the average load power of the day or the day using the analyzed power consumption type data per day, month, season, and year The peak load command current value or the load demand command current value is calculated according to the determined power consumption period, and the calculated value of the load demand command current value is calculated according to the determined power consumption period, And the control unit compares the received peak load command current value or the load demand command current value with the mini solar photovoltaic current so as to allow the inverter to determine whether the output current of the inverter exceeds the peak load command current value or the load demand command current The inverter can be controlled to follow the value.

A method of controlling a mini solar photovoltaic power generation system according to an embodiment of the present invention includes steps of measuring voltage and current of a system, calculating power consumption using measured voltage and current values, Analyzing the power consumption type by analyzing the received power consumption, transmitting a signal for controlling the mini solar photovoltaic device in correspondence with the analyzed power consumption type, and outputting the inverter command current according to the transmitted signal And a step of generating the data.

The step of generating the inverter command current according to an exemplary embodiment of the present invention may include generating an inverter command current to perform a power conditioning system (PCS) and a demand side management (DSM) function.

The step of generating the inverter command current according to an embodiment of the present invention may further include generating a PWM switching pattern for causing the inverter current to follow the command current.

Meanwhile, as an embodiment of the present invention, a computer-readable recording medium on which a program for causing the computer to execute the above-described method may be provided.

According to the method and apparatus for controlling a mini solar power generation system according to an embodiment of the present invention, the entire power optimization can be performed through power flow control suitable for a smart grid.

According to the control method and apparatus of the mini solar power generation system according to the embodiment of the present invention, the efficiency of the solar power generation system can be optimized by performing the load demand management and the peak load removing function.

According to the control method and apparatus of the mini solar power generation system according to the embodiment of the present invention, by real-time monitoring, it is possible to provide an optimum energy usage guide capable of monitoring, diagnosing, analyzing and prescribing mini solar power generation system .

1 is a block diagram showing a configuration of a mini solar photovoltaic generation apparatus of a mini solar PV system according to an embodiment of the present invention.
2 is an equivalent circuit diagram of a mini solar photovoltaic device 100 according to an embodiment of the present invention.
FIG. 3 is a diagram showing a vector diagram according to an operation mode according to an embodiment of the present invention. FIG. 3A is a vector diagram of a PCS operation mode, FIG. 3B is a vector diagram of a discharge mode Fig. 3 (c) is a diagram showing a vector diagram of the charging mode in the DSM mode.
4 is a block diagram of a control algorithm of a mini solar photovoltaic device according to an embodiment of the present invention.
5 is a block diagram illustrating a configuration of a power measurement apparatus according to an embodiment of the present invention.
6 is a block diagram of a mini solar power generation system according to an embodiment of the present invention.
FIG. 7 is a web-based monitoring conceptual diagram of a mini solar power generation system according to an embodiment of the present invention.
FIG. 8 is a graph of power consumption form analysis for 24 hours according to an embodiment of the present invention.
9 is a flowchart showing a control method of a mini solar photovoltaic generation system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

The terms used in this specification will be briefly described, and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention. Also, the terms "part," " module, "and the like described in the specification mean units for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software . In addition, when a part is referred to as being "connected" to another part throughout the specification, it includes not only "directly connected" but also "connected with other part in between".

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a configuration of a mini solar photovoltaic device 100 of a mini solar PV system 1000 according to an embodiment of the present invention.

1, the mini solar power generation apparatus includes a solar cell array 10, an MPPT converter 20, an inverter 30, a battery charging / discharging unit 40, a battery 42, a control unit 60, ).

The solar cell array 10 according to an embodiment of the present invention is a device in which a plurality of solar cell modules for converting sunlight into electric energy are connected in series or in parallel. That is, in the solar cell array 10, a plurality of solar cell modules are connected in series or in parallel, and the absorbed solar energy can be converted into electric energy to generate a predetermined voltage and current.

The MPPT (Maximum Power Point Tracking) converter 20 according to an embodiment of the present invention can convert the voltage of the DC power generated by the solar cell array 10. The mini solar photovoltaic device 100 is a small capacity grid-connected power generation device. Since the voltage of the power produced by the solar cell array 10 is small, the solar cell array 10 is produced, It is necessary to increase the voltage of the supplied power. Accordingly, the MPPT converter 20 converts the power produced and supplied by the solar cell array 10 to the maximum power point value (MPPT) and converts it to a voltage level that the inverter 30 can receive can do.

The inverter 30 according to an embodiment of the present invention may convert DC power into AC power in order to transfer the converted DC power from the MPPT converter 20 to the load or the system as AC power. That is, the use of electricity in the customer uses AC power, so that inverter 30 can convert the converted DC power from MPPT MPPT converter 20 into AC power.

In addition, since there is a limit in the allowable electric power of the electric appliance used in the customer, the inverter 30 can set the rated electric power at the maximum power that can be used for a long time without damaging the use of the electric appliance.

The battery charging and discharging unit 40 according to an embodiment of the present invention charges the battery 42 using the DC power converted from the MPPT converter 20 or discharges the battery 42 to generate DC power Can be supplied. For example, when the power immediately required by the customer is smaller than the electric power produced and supplied by the solar cell array 10, the electric energy is supplied to the customer through the inverter 30 and the battery charging / discharging unit 40 is used So that the battery can be charged with electric energy. In addition, when the power immediately required by the customer is larger than the electric power produced and supplied by the solar cell array 10, the battery charging unit 40 is used to discharge the already charged battery 42, Can supply.

The battery 42 according to an embodiment of the present invention can charge or discharge electric energy by controlling the battery charging / discharging unit 40. For example, the battery 42 may store the converted DC power in the MPPT converter 20 in the form of electric energy or discharge the electric energy toward the inverter for power supply, under the control of the battery charging unit 40 . Wherein the battery may include at least one of a rechargeable lead acid battery, a nickel cadmium battery, a nickel metal hydride battery, and a lithium ion battery.

The communication unit 50 according to an embodiment of the present invention can enable network communication with the server 300. [ That is, the communication unit 50 can transmit the status information value of the mini solar photovoltaic device 100 to the server so that the server 300 can check the status of the mini solar PV 100. [ For example, the communication unit 50 receives status information of the solar cell array 10, the MPPT converter 20, the inverter 30, the battery charging unit 40, and the battery 42, that is, The temperature, the current, and the voltage value information of each component included in the server 300.

In addition, the communication unit 50 according to an embodiment of the present invention can receive the control signal of the mini solar photovoltaic device 100 from the server 300. For example, the server 300 can analyze the power consumption form of the consumer so that the mini-PV system 100 can be efficiently operated. The server 300 analyzes the power consumption pattern of the mini solar The control signal of the photovoltaic device 100 can be transmitted to the control unit 60 through the communication unit 50. [

The control unit 60 according to the embodiment of the present invention can control the inverter 30 and the battery charging and discharging unit 40 to supply electric energy supplied from the solar cell array 10 to the customer. For example, the controller 60 calculates the power supplied from the solar cell array 10, the power to be supplied to the inverter 30, and the battery to be charged or discharged in accordance with the amount of power required by the customer, The inverter 30 and the battery charging / discharging unit 40 can be controlled under the control conditions suitable for the inverter 30.

In addition, the controller 60 according to an exemplary embodiment of the present invention basically performs a power conditioning system (PCS) function to improve the quality of the system and performs a load sharing (DSM) control for load demand management can do. That is, the controller 60 may control the inverter to perform the PCS and DSM modes according to the load condition and the battery condition. Here, the DSM mode can be classified into a discharge mode that supplies power to the load to reduce the maximum power of the system and a charge mode that stores power in the battery.

FIG. 2 is an equivalent circuit diagram of a mini solar photovoltaic device 100 according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a vector diagram according to an operation mode according to an embodiment of the present invention. 3 (a) is a vector diagram of a PCS operation mode, FIG. 3 (b) is a vector diagram of a discharge mode in a DSM mode, and FIG. 3 (c) is a diagram showing a vector diagram of a charge mode in a DSM mode.

2, the inverter 30 can be interpreted as an AC current source in an equivalent circuit, and the grid voltage (V _g), the load voltage (V _L) and the inverter voltage (V _c) is a size in the form connected in parallel and And the load current I _L is the sum of the grid current I _g and the inverter current I _c as shown in Equation 1 below.

On the other hand, if the grid current I _g is expressed as an effective component and an invalid component, it can be expressed by the following Equation (2).

Where subscript p denotes the effective component of each current and subscript q denotes the ineffective component of each current.

Referring to Figure 3, PCS mode, the grid current (I _g) to enhance the system quality of Figure 3 (a) is always active current (I _gp) only need to supply it grid current (I _g) is in the load (I _Lp = I _gp ) and the inverter current I _c should only supply the reactive current (I _Lq = I _cq ) required by the load. Therefore, the grid current can always be supplied only with the active power regardless of the load condition, and can be calculated as Equation (3).

Therefore, the current I _c ^* required for the inverter 30 to perform the PCS function for improving the harmonics and the power factor of the system can be expressed as Equation (4).

Where P _L is the load effective power and Q _L is the load reactive power.

Referring to FIG. 3, in the DSM mode as shown in FIGS. 3 (b) and 3 (c), power can be supplied or stored using the battery 42 according to the load condition, and the PCS function can be simultaneously performed.

3 (b) is a mode for discharging the electric power of the battery 42. When the required amount of electric power of the current consumer exceeds the amount of electric power supplied from the solar cell array 10, the electric power of the battery 42 The battery 42 can share a part of the load effective power component. That is, during peak load, the discharge mode is activated and the battery shares a part of the load effective power component, so that the required power (P _L -P _bat ) of the system can be reduced by a certain amount, Will bear.

The charging mode of FIG. 3 (c) is a mode for charging the battery 42. When the load is low, the active power of the system is supplied to the load and the battery (P _L + P _bat ) All will be charged. Therefore, the grid current and inverter current required to simultaneously perform the PCS and DSM functions can be calculated by Equation (5) and Equation (6), respectively.

Therefore, the control unit 60 can cancel the harmonics of the grid current by controlling the current of the inverter, maintain the power factor at 1 at all times, and supply or store power according to the load condition and the state of the battery 42. [

4 is a block diagram illustrating a control algorithm of the mini photovoltaic device 100 according to an embodiment of the present invention.

4, the control algorithm of FIG. 4 generates an inverter command current (I _c ^* ) according to the load condition and the state of the battery 42 to perform a system control algorithm that performs PCS and DSM functions, And a switching control algorithm that generates a PWM switching pattern to follow the current I _c ^* . The information required in the system control algorithm of Fig. 4 is the phase and magnitude of the grid voltage (V _g ), the load conditions (V _g , I _L ) and the power of the battery (V _bat , I _bat ).

That is, the controller 60 calculates the active power of the system using the measured value and calculates the grid current I _g ^* for the active power control using Equation (5) according to the load condition and the battery condition . Further, the final inverter command current I _c ^* is calculated using Equation (6) with phase information (sinwt ^* ) synchronized with the system voltage by the calculated system current I _g ^* and the measured inverter currents I _L and PLL Can be generated. That is, the controller 60 can generate the inverter command current to perform the PCS and DSM functions according to the load condition and the battery condition.

5 is a block diagram showing a configuration of a power measuring apparatus 200 according to an embodiment of the present invention.

 Referring to FIG. 5, the power measuring apparatus 200 is installed in the distribution board 240 and is connected to the earth leakage breaker 230 to measure voltage and current of the system. The power measuring apparatus 200 may include a power measuring unit 210 and a communication unit 220 for measuring voltage and current of the system.

The power measuring unit 210 according to an embodiment of the present invention can measure voltage and current of the system and calculate various parameters using the measured values. For example, the power measuring unit 210 may calculate the apparent power, the effective power (power consumption), the reactive power, the power factor, the total harmonic distortion (THD), and the like using the measured voltage and current.

The communication unit 220 according to an embodiment of the present invention can transmit the parameters calculated by the power measuring unit 210 to the server 300 at predetermined time intervals. That is, the server 300 receives the parameters at a predetermined time interval, and can grasp the power consumption mode of the customer, the status of the mini solar power generation apparatus 100, and the like.

Figure 6 is a block diagram of a mini solar PV system 1000 in accordance with an embodiment of the present invention and Figure 7 is a block diagram of a web based PV system 1000 of a mini PV system 1000 in accordance with an embodiment of the present invention. And FIG.

6 and 7, the server 300 receives power consumption patterns of each of the canteens at a predetermined time interval from the mini-PV system 100 and the power-measuring apparatus 200, ) Of the mini solar photovoltaic device 100, receives the parameters related to the state of the mini solar PV 100, receives the mini PV power characteristics and the power consumption type using the received parameters, and transmits a signal controlling the mini PV power supply 100. The mini solar power generation apparatus 100 receives the control signal transmitted from the server 300 and controls the inverter 30 and the battery charging and discharging unit 40 in response to the received control signal to increase the solar power generation efficiency .

In addition, the server 300 according to an exemplary embodiment of the present invention analyzes the power consumption pattern by analyzing the power consumption among the received parameters, and controls the mini-PV system 100 according to the analyzed power consumption pattern A signal can be transmitted.

In addition, when receiving the parameter data, the server 300 may perform a data error check and transmit a reception completion signal to the mini-PV system 100 and the power measurement apparatus 200 when the server 300 is normal. In addition, the mini-PV system 100 and the power measurement apparatus 200 can continuously transmit the parameter data to the server 300 until receiving the reception completion signal of the server 300.

In addition, the server 300 may generate a database by using the received parameters, and generate analysis data on the power consumption mode of each customer and the operation status of the mini solar power generator 100.

In addition, the user device 400 can receive character services, SMS services, and the like related to the status of the mini solar power generation apparatus 100 from the server 300 or the mini solar power generation apparatus 100. For example, the user can confirm the present solar power generation amount or abnormality of the mini solar photovoltaic device by using the user device 400, such as a character, an SNS, or an application application. That is, the user can remotely monitor the mini PV system 100 using the user device 400.

FIG. 8 is a graph of power consumption form analysis for 24 hours according to an embodiment of the present invention.

8, a light load period 800 in which the peak load period 900 in which the power consumption 600 is higher than the average load power 700 and the light consumption 600 in which the power consumption 600 is lower than the average load power 700, Can exist.

The server 200 according to an exemplary embodiment of the present invention performs a peak cutting method and a demand side management (DSM) function to optimize energy consumption and generation facilities of each customer.

Peak cutting is a method of removing peak load only in the power consumption mode, and it is a method to secure the power reserve ratio by reducing the maximum power consumption of the system by removing the maximum power consumption period of the customer.

Referring to FIG. 8, the load demand management (DSM) function is a function for managing demand appropriately for a load. In the case of the light load section 800, the power remaining in the solar power generation is stored in the battery 42, In the case of the load section 900, energy required for power shortage is discharged by discharging the energy stored in the battery 42 to compensate for the shortage, thereby efficiently using the energy.

The server 300 according to an exemplary embodiment of the present invention may use the parameters received from the power measuring apparatus 200 to perform peak cutting or a demand side management (DSM) , The season, and the year, calculates the inverter command value according to the analyzed power consumption type, and transmits the calculated command value to the mini solar power generator 100.

For example, the server 300 determines a peak load to be removed after determining the average load power for the day or the day using the power consumption type data for each day, month, season, and year analyzed for peak load elimination It can be calculated every set time period. For example, assuming that a predetermined time period is 10 minutes, the peak load W and the peak load command value can be expressed by the following Equations (7) and (8).

Here, the peak load means a power consumption period higher than the average load power, and the command value can be replaced with the command current value.

That is, the server 300 can calculate the inverter command current value using the peak load at a predetermined time period and transmit it to the mini solar photovoltaic device 100, and the control unit 60 transmits the received inverter command value to the mini sun Compared to photovoltaic current, the inverter can control the inverter 30 such that the output current of the inverter follows the peak load command current value.

In addition, the server 300 according to an embodiment of the present invention determines the average load power of the day or the day using the analyzed power consumption type data for each day, month, season, and year, The load demand management schedule can be determined and the power consumption interval and the low power consumption interval higher than the average load power can be confirmed using the determined load demand management schedule. Assuming that the predetermined time period is 10 minutes, the load demand management schedule can be expressed by Equation (9).

Here, since the power consumption period higher than the average load power is the peak load period 900, the server 300 calculates the attached load command current value and transmits it to the control unit 60. The attached load command current value can be calculated using Equation (7) and Equation (8).

In addition, since the power consumption period lower than the average load power is the light load period 800, the server 300 calculates the load demand command current value and transmits it to the control unit 60. That is, the server 300 can calculate the load demand management value in the light load section 800 and calculate the load demand command value using the calculated load demand management amount. The load demand management amount and the load demand command value Ah can be calculated using the following Equations (10) and (11).

Here, the total peak load per day refers to the sum of the peak load that occurred the day before, and the sum of the photovoltaic power per day refers to the sum of the photovoltaic power generated the day before.

If the load demand management quantity is mathematically negative (-), the load demand command value becomes zero. This means that there is no need to store the battery because the photovoltaic power is greater than the peak load.

That is, the load demand management amount is the sum of the powers to be stored in the battery 42 using the power of the system in the light load section 800, and the final load demand command current A is expressed by Equation (12) . ≪ / RTI >

For example, if the load demand command current is 10 (Ah) and the load demand management time (light load section) is 5 hours, the command current becomes 2 (A).

The control unit 60 according to an embodiment of the present invention may be configured such that when the peak load command current value (peak load section) or the load demand command current value (light load section) received from the server 300 is smaller than the mini solar photovoltaic current The inverter output current is controlled so as to follow the inverter command value, and the remaining power can be stored in the battery 42 through the battery charging and discharging unit 40.

When the peak load command current value (peak load section) or the load demand command current value (light load section) received from the server 300 is larger than the mini solar photovoltaic current, the control unit 60 outputs the inverter output current to the inverter It is possible to control the output current of the inverter so as to follow the command value and to discharge the electric energy stored in the battery 42 through the battery charging part 40. [ If there is no mini solar photovoltaic current and no electrical energy stored in the battery, the switch connected to the inverter 30 may be opened and wait until mini solar photovoltaic current is generated.

When the peak load command current value (peak load section) or the load demand command current value (light load section) received from the server 300 is equal to the mini solar photovoltaic current, the controller 60 controls the inverter output current The output current of the inverter can be controlled so as to follow the command value.

That is, the server 300 according to an exemplary embodiment of the present invention uses the power consumption type data for each day, month, season, and year to perform peak cutting or a demand side management (DSM) , Determines a load demand management schedule of a predetermined time period after determining the average load power of the day or the day before, determines a load demand management schedule higher than the average load power (peak load period) and a low power consumption And calculates the peak load command current value or the load demand command current value according to the determined power consumption section and transmits the calculated peak load command current value or the load demand command current value to the mini solar power generation apparatus 100. The control section 60 Compares the peak load command current value or the load demand command current value with the mini solar photovoltaic current, and allows the inverter to determine whether the output current of the inverter is the peak load command current value or the load demand It is possible to control to follow the command current value.

9 is a flowchart showing a control method of a mini solar photovoltaic generation system according to an embodiment of the present invention.

Referring to FIG. 9, the voltage measuring apparatus 20 measures the voltage and current of the system, calculates power consumption using the measured voltage and current value (S10), and transmits the calculated power consumption to the server 300 (S20). The server 300 analyzes the received power consumption to analyze the power consumption pattern (S30), and transmits a signal for controlling the mini solar power generator 100 according to the analyzed power consumption pattern (S40) . The control unit 60 can generate an inverter command current for controlling the inverter in accordance with the transmitted signal (S50).

The algorithm for generating the inverter command current by the control unit 60 includes an algorithm for generating an inverter command current to perform a PCS (Power conditioning System) and a DSM (Demand Side Management) function, and an algorithm for causing the inverter current to follow the command current Lt; RTI ID = 0.0 > PWM switching < / RTI >

The contents of the mini solar power generation system 1000 described above may be applied in connection with the control method of the mini solar power generation system 1000 according to an embodiment of the present invention. Accordingly, the description of the same contents as those of the mini solar power generation system 1000 described above with respect to the control method of the mini solar power generation system 1000 is omitted.

One embodiment of the present invention may also be embodied in the form of a recording medium including instructions executable by a computer, such as program modules, being executed by a computer. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

10: solar cell array 20: MPPT converter
30: inverter 40: full charge of battery
42: battery 50:
60: control unit 100: mini photovoltaic device
200: power measuring device 210: power measuring part
220: communication unit 230:
240: Distribution board 300: Server
400: user device 600: power consumption
700: Average load power 800: Light load section
900: Peak load section 1000: Mini PV system

Claims (10)

In a mini solar power generation system,
Mini photovoltaic devices that produce electrical energy from sunlight;
A power measuring device for measuring the voltage and current of the system and calculating the power consumption using the measured voltage and current value for analyzing the power consumption form of the customer; And
And a controller for receiving the power consumption calculated by the power measuring device, analyzing the received power consumption to analyze a power consumption pattern, and transmitting a signal for controlling the mini solar power generator according to the analyzed power consumption pattern server; Lt; / RTI >
The mini photovoltaic device
A solar cell array coupled to a plurality of solar cell modules for converting sunlight into electric energy;
An MPPT converter for converting a voltage of DC power generated by the solar cell array;
An inverter for inverting the converted DC power from the MPPT converter into AC power;
A battery charging / discharging unit charging / discharging the battery using the converted DC power from the MPPT converter;
A battery charged or discharged by the battery charging unit;
A communication unit capable of network communication with the server; And
A controller for controlling the inverter and the battery charge / discharge unit; Lt; / RTI >
The controller generates an inverter command current to perform a power conditioning system (PCS) and a demand side management (DSM) function according to the load condition and the battery condition, and generates a PWM switching pattern for following the generated inverter command current Generate,
The inverter command current,

In mini solar power system.
delete delete The method according to claim 1,
In order to perform peak cutting or a demand side management (DSM) function, the server analyzes power consumption patterns of customers by day, month, season, and year, Calculates a command current value, and transmits the calculated inverter command current value to the mini solar power generation apparatus.
5. The method of claim 4,
The server calculates a peak load to be removed after a predetermined day or a day before the average load power is determined using the analyzed power consumption type data for each day, month, season, and year by a predetermined time period, Calculates the inverter command current value using a peak load, and transmits the calculated inverter command current value to the mini solar power generation apparatus,
Wherein the controller compares the received inverter command current value with a mini solar photovoltaic current to control the inverter so that an output current of the inverter follows the inverter command current value.
5. The method of claim 4,
The server determines a load demand management schedule of a predetermined time period after determining the average load power for the day or the day using the analyzed power consumption type data for each day, month, season, and year, A power consumption period and a low power consumption period higher than the average load power are checked using a management schedule and a peak load command current value or a load demand command current value is calculated according to the determined power consumption period, ≪ / RTI >
The control unit compares the peak load command current value or the load demand command current value with the mini solar photovoltaic current to determine whether the output current of the inverter follows the peak load command current value or the load demand command current value Wherein said inverter controls said inverter.
A method of controlling a mini solar power generation system,
Measuring voltage and current of the system, and calculating power consumption using the measured voltage and current value;
Transmitting the calculated power consumption to a server;
Analyzing the received power consumption to analyze a power consumption pattern;
Transmitting a signal for controlling the mini solar photovoltaic device in accordance with the analyzed power consumption pattern; And
And generating an inverter command current in accordance with the transmitted signal,
The step of generating the inverter command current includes generating an inverter command current to perform a power conditioning system (PCS) and a demand side management (DSM) function, and generating a PWM switching pattern for tracking the generated inverter command current ≪ / RTI >
The inverter command current,

In solar power system control method.
delete delete A computer-readable recording medium having recorded thereon a program for implementing the method of claim 7.

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