KR20180086576A - A Monitering Method of Solar Generater - Google Patents

Abstract

The present invention relates to a solar power generation monitoring method comprising: a step (S101) of converting solar energy into electric energy; a step (S103) of determining whether power supply to a system (109) is required; a step (S105) of charging a battery energy storage system (113) if power supply to the system (109) is not required; a step (S107) of charging the battery energy storage system (113); a step (S109) of discharging the battery energy storage system (113) if discharge of the battery energy storage system (113) is required; a step (S111) of inverting the discharged electric energy and the converted electric energy into an alternating current; a step (S113) of filtering noise of the inverted power; and a step (S117) of supplying the converted electric energy to the system (109) or a load (117). Accordingly, it is possible to determine the overcharge state of a battery using a battery charging voltage calculated through a corrected deviation.

Description

A MONITORING METHOD OF SOLAR GENERATOR

The present invention relates to a solar power generation monitoring method, and more particularly, to a solar power generation monitoring method for monitoring a solar power generation apparatus, ≪ / RTI >

Concerns about depletion of fossil energy, such as petroleum and environmental pollution, have raised interest in alternative energy sources. Among them, photovoltaic power generation, which is a large-scale production of electricity using solar energy by spreading panels with solar cells on a large scale, is attracting attention. Solar power generation uses infinite, pollution-free solar energy, so there is no fuel cost, and there is no air pollution or waste generation.

There are two types of solar power generation systems: stand-alone system and grid-connected system. The stand-alone method uses a photovoltaic device connected to an independent load that is not connected to the grid. The grid-connected method uses solar power generator connected to existing power system. When electricity is generated in the daytime from the photovoltaic power generation system, electricity is supplied from the system at night or rainy days. In order to efficiently use the grid-connected photovoltaic power generation system, idle power is stored in the battery energy storage system (BESS) at the light load, and when the battery is overloaded, the battery energy storage system is discharged A solar power generation system in which electric power is supplied to the system has been introduced.

The generation amount of such photovoltaic devices is greatly influenced by environmental factors such as weather and sight. Therefore, it is necessary to continuously detect these environmental factors. In addition, photovoltaic devices require a relatively large area to absorb large amounts of sunlight. Therefore, photovoltaic devices are often located remotely from a residential area or from a manager's working area that manages the PV system.

Particularly, in monitoring the operation of the photovoltaic device, it is possible to relatively accurately determine the normal operation and efficiency of the photovoltaic device by measuring the amount of solar radiation and checking the amount of power generation according to the amount of solar radiation.

When the battery is overcharged, oxygen is generated in the positive electrode, and the produced oxygen is consumed in the negative electrode to heat the battery. Damage to the battery due to overcharging is a normal procedure for most charging techniques. Accordingly, battery manufacturers are making batteries with extra cathode materials. However, overcharging inevitably consumes the negative electrode, and when the excess negative electrode material is consumed, the amount of the negative electrode to be used for charge storage is reduced by subsequent overcharging. Eventually, overcharging will result in a continuous decrease in battery capacity. In order to solve this problem, various devices and methods for measuring the charging voltage of a battery have been proposed. U.S. Patent No. 5,404,106 discloses an apparatus capable of preventing overcharging by measuring the remaining charge capacity of a battery. In this section, a table showing the residual charge capacity as a function of the internal resistance measurement value and the discharge current measurement value of the battery is prepared, and the residual charge capacity of the battery is calculated using the table.

In addition, Korean Patent Laid-Open Publication No. 2001-0040157 discloses a battery charge state measuring apparatus. Here, as a function of current operating characteristics of the battery, the initial maximum charge voltage is corrected according to the battery usage time by using the approximate cumulative operation time of the battery, and the battery charge . Also, Korean Patent Laid-Open No. 2002-0003377 discloses a system and method for continuously charging a battery cell. Here, after the battery is charged to a predetermined charge level, a voltage lower than the maximum charge voltage of the battery is continuously applied for a predetermined time period to prevent overcharge.

In addition, various methods have been proposed to determine the charge termination time of the battery. For example, there is a method of forcing a current pulse on a battery and applying a discharge pulse after a charging pulse. There is also a method of measuring the non-resistance terminal voltage of the battery after the end of the charging pulse and comparing it with the reference voltage to determine whether the battery is overcharged.

However, there has been a problem that the concept of inducing an administrator to correct an error situation by outputting an alarm sound accurately in relation to overcharging has not been found yet.

 The present invention determines the overcharged state of the battery using the battery charge voltage calculated through the corrected deviation and outputs the overcharged state through the alarm sound to induce the manager to actively heal the error state have.

As means for achieving the above object,

The present invention includes a solar cell array 101 converting solar energy into electrical energy (S101); A step (S103) of judging whether or not the system control section (115) requires power supply to the system (109); If power supply to the system 109 is not required, the system control unit 115 controls the charge control unit 111 to charge the battery energy storage system 113 (S105); The charging control unit 111 receives the control signal to charge the battery energy storage system 113 and determines whether the system control unit 115 needs to discharge the battery energy storage system 113 (S107); If it is necessary to discharge the battery energy storage system 113, the system control unit 115 controls the charge control unit 111 to discharge the battery energy storage system 113 (S109); (S111) inverting the electric energy discharged by the battery energy storage system (113) by the inverter (103) and the electric energy converted by the solar cell array (101) by AC; Filtering the noise of the inverted power (S113) of the AC filter (105); (S115) of converting the magnitude of the voltage of the filtered alternating-current power to the AC / AC converter 107 and supplying power to the system 109 or the load 117; A step (S117) of the photovoltaic device (100) supplying the converted power to the system (109) or the load (117); And outputting an alarm signal through an error signal automatic output unit under the control of the charge control unit when the charge control unit of the battery energy storage system detects and is overcharged; The automatic error signal output unit 1000 includes a power supply unit 1101 for applying a power supply signal by its own power supply; An error signal output unit 1102 for receiving a signal from the charge control unit and switching the power supply circuit; An oscillation transformer 1103 which is supplied with electricity when the power supply unit is turned on and outputs a boosted AC current; A relay operation switching unit 1108 connected to the output terminal of the oscillation transformer 1103 and turned on by electrical supply; A relay switch 1107 installed at an output terminal of the switching unit 1108 for generating a magnetic force and generating a magnetic force; A first circuit connection switch sw1 that performs a function of energizing the circuit while the iron wire is pulled by the relay switch 1107; An error signal output power switch sw2 for supplying power to the error signal output control unit 1140 and displaying an error signal when the relay wire is pulled by the relay switch 1107; A circuit-operating iron piece (1131) which contacts the first circuit connecting switch to turn on the power-source holding switch part; An error signal output control unit power connection iron piece 1132 designed to operate in conjunction with the circuit operation iron piece and to connect the power source to the error signal output control unit when the circuit breaker is turned on; The first circuit connection switch and the base end are connected to each other and the emitter end and the collector end are connected to the oscillation transformer 1103 and the relay operation switching part 1108. The operation of the relay operation switching part 1108 pulls the iron piece When the first circuit connection switch sw1 and the error signal output power switch sw2 are forcibly turned off at this time, the closed circuit is broken, And the relay switch 1108 is turned on to turn on the first circuit connection switch sw1 and the error signal output power switch sw2 so as to continuously output an error signal And a switching unit 1118 for maintenance.

In addition, the error signal automatic output unit 1000 is provided between the first circuit connection switch and the circuit breaker for inducing the first circuit connection switch and the circuit breaker to remain in the off state at all times A resilient spring 1133; The first circuit connection switch is provided at one end of the first circuit connection switch. When the first circuit connection switch is switched by pulling the wire for circuit operation at the time of operation of the relay switch, A permanent magnet 1134 for maintaining the state; And a control unit for controlling the operation of the error signal display unit by turning off the wire for the circuit operation and the wire for connecting the error signal output control unit when the user operates the alarm unit to stop the alarm signal operation, And a manual operation switch 1135 for stopping the output of the alarm signal so that the alarm signal is no longer output.

As described above, according to the present invention, the overcharge state of the battery is determined using the battery charge voltage calculated through the corrected deviation, and the overcharge state is outputted through the alarm sound to induce the manager to actively heal the error state .

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
2 is a flowchart of a solar power generation method of the present invention.
3 is a block diagram for automatically outputting an error signal according to the present invention;
4 is a circuit diagram for automatically outputting an error signal according to the present invention.
5 is an enlarged view of the main part of Fig.

The operation principle of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings and description. It should be understood, however, that the drawings and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention, and are not to be construed as limiting the present invention.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terms used below are defined in consideration of the functions of the present invention, which may vary depending on the user, intention or custom of the operator. Therefore, the definition should be based on the contents throughout the present invention.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. The configuration is omitted as much as possible, and a functional configuration that should be additionally provided for the present invention is mainly described.

Those skilled in the art will readily understand the functions of the components that have been used in the prior art among the functional configurations that are not shown in the following description, The relationship between the elements and the components added for the present invention will also be clearly understood.

In order to efficiently explain the essential technical features of the present invention, the following embodiments properly modify the terms so that those skilled in the art can clearly understand the present invention, It is by no means limited.

As a result, the technical idea of the present invention is determined by the claims, and the following embodiments are merely illustrative of the technical idea of the present invention in order to efficiently explain the technical idea of the present invention to a person having ordinary skill in the art to which the present invention belongs. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

2 is a flowchart of a solar power generation method of the present invention.

3 is a block diagram for automatically outputting an error signal according to the present invention;

4 is a circuit diagram for automatically outputting an error signal according to the present invention.

5 is an enlarged view of the main part of Fig.

First, a photovoltaic device according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

1 is a block diagram of a photovoltaic generator according to an embodiment of the present invention.

The photovoltaic device 100 according to one embodiment of the present invention includes a solar cell array 101, an inverter 103, an AC filter 105, an AC / AC converter 107, a system 109, 111, a battery energy storage system 113, a system control unit 115, and a load 117.

The solar cell array 101 combines a plurality of solar cell modules. The solar cell module is a device for connecting a plurality of solar cells in series or in parallel to convert solar energy into electrical energy to generate a predetermined voltage and current. Therefore, the solar cell array 101 absorbs solar energy and converts it into electric energy.

The inverter 103 inverts the DC power to the AC power. The DC power supplied from the solar cell array 101 or the DC power discharged from the battery energy storage system 113 is supplied through the charge control unit 111 and inverted into AC power.

The AC filter 105 filters the noise of the power inverted by the AC power.

The AC / AC converter 107 converts the magnitude of the voltage of the filtered AC power so that the AC power can be supplied to the system 109 and the load 117 to supply power to the system 109 and the load 117 do.

The system 109 is a system in which many power plants, substations, transmission / distribution lines, and loads are integrated to generate and utilize electric power.

The charge control unit 111 controls charging and discharging of the battery energy storage system 113. When the system 109 or the load 117 is overloaded, the charge controller 111 receives power from the battery energy storage system 113 and transfers power to the system 109 or the load 117. When the system 109 or the load 117 is light, the charge control unit 111 receives power from the solar cell array 101 and transfers it to the battery energy storage system 113.

The battery energy storage system 113 charges and receives electrical energy from the solar cell array 101 and discharges the charged electrical energy according to the power supply status of the system 109 or the load 117. Specifically, when the system (109) or the load (117) is light load, the battery energy storage system (113) receives and charges the idle power from the solar cell array (101). When the system 109 or the load 117 is overloaded, the battery energy storage system 113 discharges the charged power and supplies power to the system 109. The power supply and demand situation of the system has a big difference by time zone. Therefore, it is inefficient to uniformly supply the power supplied from the solar cell array 101 to the solar cell generator 100 without considering the power supply / demand situation of the system 109. [ Therefore, the photovoltaic power generation apparatus 100 uses the battery energy storage system 113 to adjust the amount of power supply according to the power supply situation of the system 109 or the load 117. [ Accordingly, the photovoltaic power generation apparatus 100 can efficiently supply power to the system 109 or the load 117.

The system control unit 115 controls operations of the charge control unit 111, the inverter 103, the AC filter 105, and the AC / AC converter 107.

The load 117 consumes electric energy to be consumed.

FIG. 2 is a flowchart illustrating an operation of the photovoltaic apparatus according to an exemplary embodiment of the present invention. Referring to FIG.

The solar cell array 101 converts solar energy into electrical energy (S101).

The system control unit 115 determines whether power supply to the system 109 is necessary (S103). Whether or not the power supply to the system 109 is necessary can be determined based on whether the system 109 is overloaded or lightly loaded.

If power supply to the system 109 is not required, the system controller 115 controls the charge controller 111 to charge the battery energy storage system 113 (S105). Specifically, the system control unit 115 can generate a control signal for controlling the charge control unit 111. [

The charge control unit 111 can receive the control signal and charge the battery energy storage system 113. [

The system controller 115 determines whether the battery energy storage system 113 needs to be discharged (S107). The electric power of the system 109 can not be satisfied only by the electric energy supplied from the solar cell array 101 and it is possible to judge whether the discharge of the battery energy storage system 113 is necessary. Also, the system control unit 115 can determine whether the battery energy storage system 113 stores enough electric energy to discharge.

If it is necessary to discharge the battery energy storage system 113, the system control unit 115 controls the charge control unit 111 to discharge the battery energy storage system 113 (S109). Specifically, the system control unit 115 can generate a control signal for controlling the charge control unit 111. [ The charge control unit 111 may receive the control signal and discharge the battery energy storage system 113. [

The inverter 103 inverts the electric energy discharged by the battery energy storage system 113 and the electric energy converted by the solar cell array 101 by AC (S111). At this time, the grid-connected photovoltaic device 100 inverts the electric energy discharged by the battery energy storage system 113 and the electric energy converted by the solar cell array 101 through one inverter 103. Each electric appliance has a limited power available. This limit has an instantaneous limit and a limit when it is used for a long time. Even if it is used for a long time, the rated power is set to the maximum power that can be used without any damage to the device. In order to maximize the efficiency of the inverter 103, the battery energy storage system 113 and the solar cell array 101 must supply power so that the inverter 103 uses about 40% to 60% of the rated power .

The AC filter 105 filters the noise of the inverted power (S113).

The AC / AC converter 107 converts the magnitude of the voltage of the filtered AC power to supply the power to the system 109 or the load 117 (S115).

The photovoltaic device 100 supplies the converted power to the system 109 or the load 117 (S117).

The charge control unit determines whether the energy storage system is overcharged. If it is determined that the battery is overcharged, the charge control unit outputs an error signal through the automatic error signal output unit.

That is, when the energy storage system is overcharged, the charge control unit may output a continuous alarm sound through the automatic error signal output unit 1000 to induce faulty repair.

The automatic error signal output unit 1000 includes a circuit power supply unit 1101, an error signal output unit 1102, an oscillation transformer 1103, a relay operation switching unit 1108, a relay switch 1107, A first circuit connection switch sw1, a communication terminal power switch sw2, and a power supply holding switch 1118. [

The power supply unit 1101 applies a power supply signal by itself.

The error signal output unit 1102 switches the power supply unit when a control signal is output from the charge control unit.

The oscillation transformer 1103 is supplied with electricity when the power supply unit is turned on, and outputs the boosted AC current.

The switching unit 1108 for relay operation is connected to the output terminal of the oscillation transformer 1103 and is turned on by electrical supply.

The relay switch 1107 is installed at an output terminal of the relay operation switching unit 1108 and generates a magnetic force.

The first circuit connection switch (sw1) performs a function of energizing the circuit by pulling the iron wire by the relay switch (1107).

The power switch for outputting the error signal sw2 induces an error signal to be displayed by supplying power to the error signal output control unit 1140 while the iron strip is pulled by the relay switch 1107. [

The power supply switching unit 1118 is connected to the base end of the first circuit connection switch and the emitter end and the collector end are connected to the oscillation transformer 1103 and the relay operation switching unit 1108, The wire is pulled by the operation of the switch 1108 to form a closed circuit while switching is turned on, and then the operation of the relay switch 1107 is stopped. At this time, if the first circuit connecting switch sw1 and the error signal output power switch sw2 are forcibly turned off, the closed circuit is broken while the closed circuit is broken and the relay operating switch 1108 is turned on and the relay switch is turned on The first circuit connecting switch sw1 and the error signal output power switch sw2 are turned on to induce the error signal to be output continuously.

The present invention further includes a circuit element for operation 1131 and an alarm signal operation control unit power connecting piece 1132, a resilient spring 1133, a permanent magnet 1134, and a manual operation switch 1135 .

The circuit-operating piece 1131 contacts the first circuit connecting switch to turn on the power-supply holding switch portion.

The error signal output control unit power connecting conduit 1132 is designed to operate in conjunction with the circuit breaker. When the circuit breaker is turned on, the error signal output control unit is connected to the power source to induce the alarm apparatus to operate.

The elastic spring 1133 is provided between the first circuit connection switch and the circuit operation steel wire to guide the first circuit connection switch and the circuit operation wire to be kept in an off state at all times during non-operation.

The permanent magnet 1134 is installed at one end of the first circuit connection switch. When the first circuit connection switch is switched by pulling the wire for circuit operation at the time of operation of the relay switch, the circuit for operating the circuit is attached so that even if the operation of the relay switch is stopped The ON state of the switching unit for power supply maintenance is maintained.

The manual operation switch 1135 is coupled to a wire for circuit operation and a wire for connecting an error signal output control unit to the power supply. When the user operates the wire to stop the operation of the alarm signal, The operation of the error signal display unit is stopped so that the alarm signal is no longer output.

Hereinafter, the operation of the error signal automatic output unit 1000 will be described.

First, when the error signal output unit 1102 is turned on, a DC power source is connected to supply power to the oscillation transformer, and a high voltage is applied to the secondary side of the oscillation transformer.

The power source induced on the secondary side becomes a DC power source of a half wave through a rectifying diode, and this half wave DC power source becomes a more stable DC power source due to the charging and discharging action of the condenser.

This DC power source is applied to the anode terminal of the thyristor through the coil of the relay switch 1107, while the DC power source charges the capacitor through the resistor. The elevated voltage passes through the die and triggers the switching section 1108 for relay operation so that the node node and the cathode node are switched so that the operation of the relay switch is made, The circuit connection switch sw1 and the error signal output power switch sw2 are turned on to apply power to the error signal output control unit 1140 to display an error signal.

When the first circuit connection switch sw1 is activated, a base end of the power supply maintaining switch 1118 is activated, and a closed circuit is induced in the emitter end and the collector end of the power supply holding switch 1118 to supply power to the transformer Off.

That is, a voltage between the resistor 1109 and the capacitor 1110 flows through the diode 1120 to flow between the emitter terminal and the collector terminal of the power source holding switching unit 1118, and the resistance between the resistor by the bypass and the capacitor When the voltage between the resistor and the capacitor is lowered, the trigger signal to the switching unit for relay operation 1108 is stopped, so that the node end and the tail end are turned off and the current flows to the relay switch 1107 So that the power supply is continuously stopped for switching.

On the other hand, if the operator turns off the first circuit connecting switch and the error signal output power switch during the error signal output, there is no current flow in the closed circuit, and accordingly, the bias voltage flowing between the emitter end and the base end of the power- And the power supply switching unit 1118 is turned off.

The power supply switching unit 1118 is turned off to remove the bypass voltage between the resistor and the capacitor through the diode 1120 and the voltage is charged in the capacitor 1110.

The charged voltage causes a break-over phenomenon of the die 1111 and a trigger signal is output from the die to the switching section 1108 for auxiliary switch operation to move the iron piece, while maintaining the closed circuit, and at the same time, So that the error signal display unit 1150 can be continuously operated.

That is, according to the present invention, if an error factor is not cured, a warning sound is continuously output to guide the user to heal an error factor.

That is, even if the user turns off the alarm signal by operating the manual switch 1135 while the error signal output unit 1102 is in the on state, the alarm signal is automatically output by returning the power source again, It is possible to induce to completely shut off the error signal since it is restarted again even if the alarm signal is cut off.

If the error signal output section is turned off, the user can operate the manual switch 1135 to manually shut off the alarm signal.

101: Solar cell array
103: Inverter
105: AC filter
107: AC / AC converter
109: System
111:
113: Battery energy storage system
115:
117: Load
100: Photovoltaic device
1000: Error signal automatic output section

Claims (2)

A step (S101) of the solar cell array 101 to convert solar energy into electric energy;
A step (S103) of judging whether or not the system control section (115) requires power supply to the system (109);
If power supply to the system 109 is not required, the system control unit 115 controls the charge control unit 111 to charge the battery energy storage system 113 (S105);
The charging control unit 111 receives the control signal to charge the battery energy storage system 113 and determines whether the system control unit 115 needs to discharge the battery energy storage system 113 (S107);
If it is necessary to discharge the battery energy storage system 113, the system control unit 115 controls the charge control unit 111 to discharge the battery energy storage system 113 (S109);
(S111) inverting the electric energy discharged by the battery energy storage system (113) by the inverter (103) and the electric energy converted by the solar cell array (101) by AC;
Filtering the noise of the inverted power (S113) of the AC filter (105);
(S115) of converting the magnitude of the voltage of the filtered alternating-current power to the AC / AC converter 107 and supplying power to the system 109 or the load 117;
A step (S117) of the photovoltaic device (100) supplying the converted power to the system (109) or the load (117);
And outputting an alarm signal through an error signal automatic output unit under the control of the charge control unit when the charge control unit of the battery energy storage system detects and is overcharged;
The error signal automatic output unit 1000 outputs,
A power supply unit 1101 for applying a power supply signal by its own power supply;
An error signal output unit 1102 for receiving a signal from the charge control unit and switching the power supply circuit;
An oscillation transformer 1103 which is supplied with electricity when the power supply unit is turned on and outputs a boosted AC current;
A relay operation switching unit 1108 connected to the output terminal of the oscillation transformer 1103 and turned on by electrical supply;
A relay switch 1107 installed at an output terminal of the switching unit 1108 for generating a magnetic force and generating a magnetic force;
A first circuit connection switch sw1 that performs a function of energizing the circuit while the iron wire is pulled by the relay switch 1107;
An error signal output power switch sw2 for supplying power to the error signal output control unit 1140 and displaying an error signal when the relay wire is pulled by the relay switch 1107;
A circuit-operating iron piece (1131) which contacts the first circuit connecting switch to turn on the power-source holding switch part;
An error signal output control unit power connection iron piece 1132 designed to operate in conjunction with the circuit operation iron piece and to connect the power source to the error signal output control unit when the circuit breaker is turned on;
The first circuit connection switch and the base end are connected to each other and the emitter end and the collector end are connected to the oscillation transformer 1103 and the relay operation switching part 1108. The operation of the relay operation switching part 1108 pulls the iron piece When the first circuit connection switch sw1 and the error signal output power switch sw2 are forcibly turned off at this time, the closed circuit is broken, The switch 1108 for relay operation is turned on and the relay switch is turned on to turn on the first circuit connection switch sw1 and the error signal output power switch sw2 so as to continuously output an error signal And a switching unit (1118) for maintaining the photovoltaic power generation. The method according to claim 1,
The error signal automatic output unit 1000 outputs,
A resilient spring (1133) installed between the first circuit connection switch and the circuit operation iron piece to guide the first circuit connection switch and the circuit operation iron piece to be kept in an off state at all times during non-operation;
The first circuit connection switch is provided at one end of the first circuit connection switch. When the first circuit connection switch is switched by pulling the wire for circuit operation at the time of operation of the relay switch, A permanent magnet 1134 for maintaining the state;
And a control unit for controlling the operation of the error signal display unit by turning off the wire for the circuit operation and the wire for connecting the error signal output control unit when the user operates the alarm unit to stop the alarm signal operation, And a manual operation switch (1135) for stopping the output of the alarm signal so that no further alarm signal is outputted.

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