KR20200063552A - Solar Array Simulator And Self-Validation Method Thereof - Google Patents

Abstract

The present invention relates to a solar array simulating device and a self-validation method. According to the present invention, the device comprises: a power output unit including a plurality of power output modules; a control monitoring unit controlling the plurality of power output modules to output power according to a preset current-voltage characteristic curve; a self-validation support unit providing a circuit configuration for measuring a short-circuit current and an opening voltage of the plurality of power output modules; and a data measurement unit measuring a signal output by the self-validation support unit to provide the measurement result to the control monitoring unit. The present invention can check functions of self-validation on whether normal power is output, over-voltage protection and over-current protection in the solar array simulating device while checking the opening voltage or the short circuit current according to the real current-voltage characteristic curve of the solar array, not a general power output.

Description

Solar Panel Simulator and Self-Validation Method Thereof

The present invention relates to a solar panel simulation device and a self-diagnostic method.

In general, an artificial satellite is an artificial device launched from the Earth and orbiting the Earth, and is used in scientific observation research, information gathering necessary for security, including military, and industrial activities using space. Once a satellite is launched, it cannot be recovered and repaired to the ground even if a failure occurs, so strict test evaluation work is involved at each stage, from the initial design stage to the production and performance verification stages.

In addition, the ground support equipment (EGSE) is used on the ground to verify that the satellite functions properly according to the needs of the satellite's power meter, attitude control system, and telemetry commander until it is designed and assembled before launch. The satellite function test is being performed.

Among these satellite function tests, the satellite power meter function test connects an electric ground support equipment (Power EGSE) and a solar panel simulated ground support equipment (SAS EGSE: Solar Array Simulator EGSE) to an electronic load device to check the power status and correct power. You can see if it prints.

However, before applying the solar panel simulation ground support equipment to the actual load, it is necessary to verify the power output state in each power output module. However, the method of checking the equipment before applying it to the actual load of the existing solar panel simulation equipment was staying in the method of checking the current voltage at one point to the electrical load.

Korean Patent Publication No. 2008-0061886 (published on 2008. 07. 03.)

Accordingly, a technical problem to be solved by the present invention is to provide a solar panel simulation device that provides a self-diagnosis function and a self-diagnosis method of the solar panel simulation device.

The solar panel simulation apparatus according to the present invention for solving the above technical problem is a power output unit including a plurality of power output modules, the plurality of power output modules to output power according to a preset current-voltage characteristic curve A control monitoring unit for controlling, a self-diagnosis support unit providing a circuit configuration for measuring short-circuit current and open voltage of the plurality of power output modules, and measuring a signal output from the self-diagnosis support unit to provide the control monitoring unit It includes a data measuring unit.

With the circuit configuration of the self-diagnosis support unit set such that the power output module to be diagnosed among the plurality of power output modules is in an open state, the control monitoring unit sequentially applies the power output modules to be diagnosed according to a plurality of current-voltage characteristic curves. It can be controlled to output power.

The plurality of current-voltage characteristic curves may have the same short circuit current but different open voltages.

With the circuit configuration of the self-diagnosis support unit set such that a power output module to be diagnosed among the plurality of power output modules is in a short-circuited state, the control monitoring unit sequentially outputs the power output modules to be diagnosed according to a plurality of current-voltage characteristic curves. It can be controlled to output power.

The plurality of current-voltage characteristic curves may have the same open voltage but different short-circuit currents.

The self-diagnosis support unit includes an on-off unit for selectively turning on and off the wiring connecting the positive and negative output terminals of the power output module to be diagnosed, a first resistor connecting the wiring between the positive and negative output terminals, and A test point measuring an open voltage of the power output module to be diagnosed and the wiring may be connected.

The self-diagnostic support unit may include a third resistor and a fourth resistor connecting the positive and negative output terminals of the power output module to be diagnosed in series, and a short circuit connected in parallel to the fourth resistor.

The short circuit section may be selectively shorted or opened.

The apparatus may further include an interlock circuit unit selectively passing power of the power output module to be diagnosed among the plurality of power output modules.

The control method of the solar panel simulation apparatus according to the present invention for solving the above technical problem is setting a circuit configuration for measuring an open voltage or a short circuit current of a power output module simulating the power output of the solar cell, the Controlling a power output module to output power sequentially according to a plurality of current-voltage characteristic curves, and measuring signals corresponding to the open voltage or short-circuit current of the power output module at test points included in the circuit configuration. Steps.

According to the present invention, the self-diagnosis and over voltage protection of the solar panel simulating device while checking the open current or short circuit current according to the actual current-voltage characteristic curve of the solar cell, not the general power output, and It has the advantage of checking the over current protection function.

1 is a configuration diagram of a solar panel simulation apparatus according to an embodiment of the present invention.
2 illustrates a current-voltage characteristic curve of power output during a self-diagnosis process according to an embodiment of the present invention.
3 illustrates a current-voltage characteristic curve of power output during a self-diagnosis process according to an embodiment of the present invention.
4 is a diagram showing the configuration of the self-diagnosis support unit of FIG. 1 according to an embodiment of the present invention.
5 is a view showing the configuration of the self-diagnosis support unit of FIG. 1 according to another embodiment of the present invention.
6 is a diagram showing the configuration of the self-diagnosis support unit of FIG. 1 according to another embodiment of the present invention.

Then, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice.

1 is a configuration diagram of a solar panel simulation apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the solar panel simulation apparatus according to an embodiment of the present invention includes a control monitoring unit 110, a data measurement unit 120, a power output unit 130, a test point power transmission unit 140, and a magnetic Diagnostic support unit 150 may be included.

The control monitoring unit 110 may control the overall operation of the solar panel simulation apparatus according to the present invention. In particular, the control monitoring unit 110 may control the plurality of power output modules 130_1, 130_2, ..., 130_N to output power according to a predetermined current-voltage characteristic curve.

When sunlight enters a solar cell, light energy is converted into electrical energy, and an electrical output is generated at a terminal of the solar cell. This is called a current-voltage characteristic. The current-voltage output value is graphically called the current-voltage characteristic curve.

The control monitoring unit 110 may store data for a plurality of current-voltage characteristic curves and select them as necessary to control the power output modules 130_1, 130_2, ..., 130_N to output power according to the selected curves. have.

Figure 2 illustrates the current of the power output during the self-diagnosis process according to an embodiment of the present invention-a voltage characteristic curve, Figure 3 is the current of the power output during the self-diagnosis process according to an embodiment of the present invention- The voltage characteristic curve is illustrated.

The control monitoring unit 110 so that the power according to the current-voltage characteristic curve as illustrated in FIGS. 2 and 3 in the self-diagnosis process of the solar panel simulation apparatus is output from the power output modules 130_1, 130_2, ..., 130_N Can be controlled.

The plurality of current-voltage characteristic curves illustrated in FIG. 2 show the case where the short-circuit current (Isc) is the same but the open voltage (Voc) is different, and the plurality of current-voltage characteristic curves illustrated in FIG. 3 show the open voltage (Voc) ) Indicates the same but different short-circuit current (Isc).

The data measurement unit 120 performs a function of measuring a signal output from the self-diagnosis support unit 150 and providing it to the control monitoring unit 110.

The power output unit 130 may include a plurality of power output modules 130_1, 130_2, ..., 130_N. Each power output module 130_1, 130_2, …, 130_N may output power according to a current-voltage characteristic curve simulating the power output of the solar cell under the control of the control monitoring unit 110. The current-voltage characteristic curve applied to each power output module 130_1, 130_2, …, 130_N may be variously determined.

The test point power transfer unit 140 performs a function of transferring power output from at least one of the plurality of power output modules 130_1, 130_2, ..., 130_N to the electronic load device 200.

During the self-diagnostic operation of the solar panel simulation apparatus according to the present invention, the electronic load apparatus 200 may not be connected. In this case, the power output from at least one of the plurality of power output modules 130_1, 130_2, ..., 130_N is self-diagnostic support unit 150 through the test point power transfer unit 140 according to the path indicated by the dotted line in FIG. 1. ).

The test point power transmission unit 140 may be provided with a plurality of test terminals (not shown) capable of directly measuring a desired power signal using a signal measurement device such as an oscilloscope or a multimeter. An external measuring device may be connected through the test terminal provided in the test point power transmission unit 140, and the transmitted power signal may be measured and verified.

The self-diagnosis support unit 150 provides a circuit configuration for measuring short-circuit current and open voltage of the plurality of power output modules 130_1, 130_2, ..., 130_N.

4 is a diagram showing the configuration of the self-diagnosis support unit of FIG. 1 according to an embodiment of the present invention.

Referring to FIG. 4, the self-diagnosis support unit 150 may include a plurality of power input units 151_1, 151_2, ..., 151_N and a plurality of circuit units 152 connected to each of them.

The power input units 151_1, 151_2, ..., 151_N may include a plurality of anode output terminals (+) and a corresponding number of cathode output terminals (-). The number of positive output terminals (+) and negative output terminals (-) included in each power input unit 151_1, 151_2, ..., 151_N is positive wiring of the power output modules 130_1, 130_2, ..., 130_N corresponding to the corresponding power input unit It may correspond to the number of over and negative wiring. In FIG. 4, two positive output terminals (+) and one negative output terminal (−) are illustrated in each circuit unit 152 for convenience of explanation, and only the wirings 1521 and 1522 connected thereto are illustrated.

The circuit unit 152 may include an on-off unit 1523 to selectively turn on and off the connection of both wires 1521 and 1522 connecting the positive output terminal (+) and the negative output terminal (-).

The on-off portion 1523 may include a fuse F, and may be connected or opened through a jumper 1524. When the jumper 1524 is inserted into the on-off section 1523 to connect the wirings 1521 and 1522, the corresponding power output modules 130_1, 130_2, ..., 130_N are in a short circuit state. When the jumper 1524 is removed from the on-off portion 1523 and the wirings 1521 and 1522 are not connected, the corresponding power output modules 130_1, 130_2, ..., 130_N are opened.

As such, the circuit unit 152 may provide a circuit configuration for measuring the short circuit current and open voltage of the power output modules 130_1, 130_2, ..., 130_N through the connection of the jumper 1524. Of course, it is also possible to replace the jumper 1524 in the on-off section 1523 with a switching means (not shown) such as a power transistor.

The circuit unit 152 may include resistors R1 and R2.

The resistor R1 is connected in series to the wirings 1521 and 1522 between the positive output terminal (+) and the negative output terminal (+). In addition, the plurality of resistors R2 may be connected between the plurality of test points TP1 measuring the open voltage of the power output modules 130_1, 130_2, ..., 130_N to be diagnosed and the wiring 1521. The test point TP1 is a test point connected to the negative output terminal (+).

In a state in which the circuit configuration of the circuit unit 152 is set to measure the open voltage of the power output modules 130_1, 130_2, ..., 130_N, the control monitoring unit 110 is short circuit current (Isc) as illustrated in FIG. 2. ) Is the same, but it is possible to control power to be output from the power output modules 130_1, 130_2, ..., 130_N to be diagnosed according to a plurality of current-voltage characteristic curves in which the open voltage Voc is gradually increased. In addition, the data measurement unit 120 may measure the open voltage of the power output modules 130_1, 130_2, ..., 130_N by measuring the voltage signal at the test point TP1 of the self-diagnosis support unit 150.

Conversely, in a state in which the circuit configuration of the circuit unit 152 is set to measure the short-circuit current of the power output modules 130_1, 130_2, ..., 130_N, the control monitoring unit 110 has an open voltage (as illustrated in FIG. 3 ). Voc) is the same, but it is possible to control the power to be output from the power output modules 130_1, 130_2, ..., 130_N to be diagnosed according to a plurality of current-voltage characteristic curves in which the short-circuit current Isc is gradually increased. In addition, the data measurement unit 120 may measure the voltage signal at the test point TP2 of the self-diagnosis support unit 150 and consider the resistance value of the resistor R1 to measure the short circuit current Isc.

The resistor R1 can be implemented with a precision high-capacity resistor of 1 Ω or less.

The circuit configuration of measuring the voltage signals at the test points TP1 and TP2 and transmitting them to the data specifying unit 120 is omitted in FIG. 1. Since the configuration of measuring and transmitting the voltage signal at any point in the circuit is well known, detailed description is omitted.

FIG. 4 shows an example in which the resistor R1 is connected through one on-off unit 1523 while a plurality of wirings 1521 are connected at opposite sides of the positive output terminal (+). In this case, some accuracy may be deteriorated, but it is sufficient to automatically perform preliminary self-diagnosis of the solar panel simulation device. If the self-diagnosis result exceeds a predetermined range, it is manually performed through the test point power transmission unit 140 described above. Accurate testing can be further performed.

5 is a view showing the configuration of the self-diagnosis support unit of FIG. 1 according to another embodiment of the present invention.

Referring to FIG. 5, unlike the embodiment of FIG. 4, it is also possible to connect the on-off unit 1523 to each wiring 1521. In this case, a more accurate measurement is possible than in FIG. 4, but a plurality of on-off units 1523 are additionally required.

6 is a diagram showing the configuration of the self-diagnosis support unit of FIG. 1 according to another embodiment of the present invention.

Referring to FIG. 6, the self-diagnosis support unit 150 may include a circuit unit 152 ′ connected to a plurality of power input units 151_1', 151_2', ..., 151_N'.

The power input units 151_1', 151_2', ..., 151_N' may correspond to the power input units 151_1, 151_2, ..., 151_N in FIG. 4 and have the same configuration.

The interlock circuit 1525' functions to selectively pass power of the power output module to be diagnosed among the plurality of power output modules 130_1, 130_2, ..., 130_N. For example, if the power output module 130_1 is a power output module to be diagnosed, only power output from the power output module 130_1 and input through the power input unit 151_1' may be output.

The interlock circuit 1525 ′ may include a plurality of anode output terminals (+) and a corresponding number of cathode output terminals (−). In FIG. 6, for convenience of explanation, three positive output terminals (+) and one negative output terminal (-) are illustrated, and only the wirings 1521' and 1522' connected thereto are illustrated.

The circuit unit 152' may include resistors R3 and R4 connected in series between the wirings 1521' and 1522' connecting the positive output terminal (+) and the negative output terminal (-), and parallel to the resistor R4 It may include a connected short circuit (1526').

The resistor R3 may be implemented as a resistor having a precision high capacity of 1 Ω or less, and the resistor R4 may be implemented as a resistor having a precision high capacity of 1 kΩ or more. In addition, the short circuit unit 1526' is a wire having little resistance, and one end may be connected to the other end of the resistor R4, and the other end may be selectively connected to one end of the resistor R3 and one end of the resistor R4. That is, when the other end of the short circuit section 1526' is connected to the contact of the resistor R3 and the resistor R4, only the resistor R3 is actually connected between the positive output terminal (+) and the negative output terminal (-), and the resistance R3 Since the resistance value of) is very small (1 Ω or less), a short-circuit current can be measured. And, on the contrary, if the other end of the short circuit section 1526' is not connected to the contact of the resistor R3 and the resistor R4, a resistance higher than 1 kΩ is caused by the resistor R4 between the positive output terminal (+) and the negative output terminal (-). It actually gets close to the open state.

As such, the circuit portion 152' selectively connects the other end of the short circuit portion 1526' to the contact of the resistor R3 and the resistor R4, thereby short-circuiting and opening the power output modules 130_1, 130_2, ..., 130_N. A circuit configuration for measuring voltage can be provided.

The embodiments described above may be implemented as hardware components, software components, and/or combinations of hardware components and software components. For example, the devices, methods, and components described in the embodiments include, for example, processors, controllers, arithmetic logic units (ALUs), digital signal processors (micro signal processors), microcomputers, and field programmable gates (FPGAs). It can be implemented using one or more general purpose computers or special purpose computers, such as arrays, programmable logic units (PLUs), microprocessors, or any other device capable of executing and responding to instructions. The processing device may run an operating system (OS) and one or more software applications running on the operating system. In addition, the processing device may access, store, manipulate, process, and generate data in response to the execution of the software. For convenience of understanding, a processing device may be described as one being used, but a person having ordinary skill in the art, the processing device may include a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that may include. For example, the processing device may include a plurality of processors or a processor and a controller. In addition, other processing configurations, such as parallel processors, are possible.

The software may include a computer program, code, instruction, or a combination of one or more of these, and configure the processing device to operate as desired, or process independently or collectively You can command the device. Software and/or data may be interpreted by a processing device, or to provide instructions or data to a processing device, of any type of machine, component, physical device, virtual equipment, computer storage medium or device. , Or may be permanently or temporarily embodied in the transmitted signal wave. The software may be distributed over networked computer systems and stored or executed in a distributed manner. Software and data may be stored in one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, or the like alone or in combination. The program instructions recorded in the medium may be specially designed and configured for the embodiments or may be known and usable by those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs, DVDs, and magnetic media such as floptical disks. -Hardware devices specifically configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language code that can be executed by a computer using an interpreter, etc., as well as machine language codes produced by a compiler. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As described above, although the embodiments have been described with limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order than the described method, and/or the components of the described system, structure, device, circuit, etc. are combined or combined in a different form from the described method, or other components Alternatively, even if replaced or substituted by equivalents, appropriate results can be achieved.

Claims (9)

Power output unit including a plurality of power output modules,
A control monitoring unit that controls the plurality of power output modules to output power according to a preset current-voltage characteristic curve,
Self-diagnosis support unit that provides a circuit configuration for measuring the short-circuit current and open voltage of the plurality of power output modules, and
Data measurement unit that measures the signal output from the self-diagnosis support unit and provides it to the control monitoring unit
Solar panel simulation device comprising a. In claim 1,
The circuit configuration of the self-diagnosis support unit is set such that the power output module to be diagnosed among the plurality of power output modules is in an open state, and the control monitoring unit sequentially determines the power output modules to be diagnosed according to a plurality of current-voltage characteristic curves. Control to output power,
The plurality of current-voltage characteristic curves have the same short circuit current, but different solar panel simulation devices. In claim 1,
With the circuit configuration of the self-diagnosis support unit set such that a power output module to be diagnosed among the plurality of power output modules is in a short-circuited state, the control monitoring unit sequentially outputs the power output modules to be diagnosed according to a plurality of current-voltage characteristic curves. Control to output power,
The plurality of current-voltage characteristic curves are solar panel simulation devices having the same open voltage but different short-circuit currents. In claim 2 or 3,
The self-diagnosis support unit,
An on-off unit for selectively turning on/off a wiring connecting the positive and negative output terminals of the power output module to be diagnosed, a first resistor connecting the wiring between the positive and negative output terminals, and the diagnostic power output module A solar panel simulation device comprising a test point for measuring the open voltage of the second resistor connecting the wiring. In claim 2 or 3,
The self-diagnosis support unit,
A third resistor and a fourth resistor connecting the positive and negative output terminals of the power output module to be diagnosed in series, and a short circuit connected in parallel to the fourth resistor,
The short circuit portion is a solar panel simulation device that is selectively shorted or opened. In claim 5,
An interlock circuit unit for selectively passing power of the diagnosis target power output module among the plurality of power output modules
Solar panel simulation device further comprising a. Setting a circuit configuration for measuring the open voltage or short circuit current of the power output module that simulates the power output of the solar cell,
Controlling the power output module to sequentially output power according to a plurality of current-voltage characteristic curves, and
Measuring a signal corresponding to an open voltage or a short circuit current of the power output module at a test point included in the circuit configuration
Self-diagnostic method of the solar panel simulation apparatus comprising a. In claim 7,
Set a circuit configuration for measuring the open voltage of the power output module,
The plurality of current-voltage characteristic curves are self-diagnosing methods of a solar panel simulation apparatus having the same short circuit current but different open voltages. In claim 7,
Set a circuit configuration for measuring the short circuit current of the power output module,
The plurality of current-voltage characteristic curves are self-diagnosing methods of a solar panel simulation apparatus having the same open voltage but different short-circuit currents.

Images