External storage device for a control device of a power conversion system, and control device of a power conversion system

Abstract

Provided is an external storage device for a control device of a power conversion system, which enables writing of data from the power conversion system even for a program having a small capacity. The external storage device for the control device of the power conversion system has a plurality of file storage areas that store data from the power conversion system, and a file management area that manages data that sets a format for storage of data in the plurality of file storage areas to a format other than a format of a file system applied to a terminal device.

Description

Technical Field

[0001] This application relates to an external storage device for a control device of a power conversion system, and a control device for a power conversion system. Background Technology

[0002] Patent document 1 discloses an electric power system. According to this electric power system, multiple power conversion systems can be operated and controlled by a single control device.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 10-201105 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, the control device described in Patent Document 1 has a limited program capacity. Therefore, there are situations where file systems applicable to typical terminal devices such as personal computers cannot be used. In this case, data from the power conversion system cannot be stored in a typical external storage device.

[0008] This application was made to solve the aforementioned problems. The purpose of this application is to provide an external storage device for a control device of a power conversion system, and a control device for a power conversion system, which can write data from the power conversion system even for programs with small capacity.

[0009] Methods for solving problems

[0010] The external storage device for the control apparatus of the power conversion system of this application includes: multiple file storage areas for storing data from the power conversion system; and a file management area for managing data that is configured not to use the file system format applied to the terminal device as the storage format for the data in the multiple file storage areas.

[0011] The control device for the power conversion system of this application includes: a data receiving unit for receiving data from the power conversion system; and a data control unit for writing the data received by the data receiving unit into the plurality of file storage areas according to a format set in the file management area.

[0012] Invention Effects

[0013] According to this application, data is stored in an external storage device in a format that does not use a file system applied to the terminal device. Therefore, even small programs can write data from the power conversion system. Attached Figure Description

[0014] Figure 1 This is a diagram of the power system configuration using the control device of the power conversion system in Implementation Method 1.

[0015] Figure 2 This is a block diagram illustrating the installation method of an external storage device for a control device of a power conversion system in Embodiment 1.

[0016] Figure 3 This is a diagram illustrating the operation of the control device of the power conversion system in Embodiment 1.

[0017] Figure 4 This is a diagram illustrating the outline of the area of ​​the external storage device for the control device of the power conversion system in Embodiment 1.

[0018] Figure 5 This is a hardware configuration diagram of a supervisory control device that transmits and receives data with the control device of the power conversion system in Implementation Method 1. Detailed Implementation

[0019] The embodiments will be described with reference to the accompanying drawings. Furthermore, in each drawing, the same or equivalent parts are labeled with the same reference numerals. Repeated descriptions of these parts have been appropriately simplified or omitted.

[0020] Implementation method 1.

[0021] Figure 1 This is a diagram of the power system configuration using the control device of the power conversion system in Implementation Method 1.

[0022] exist Figure 1 In the power system, the power conversion system 10 includes a power converter 12, a DC capacitor 14, a filter circuit 16, a DC voltage detector 18, a DC current detector 20, multiple AC voltage detectors 22a to 22c, multiple AC current detectors 24a to 24c, multiple DC switches 26a and 26b, multiple AC switches 28a to 28c, and a control device 34.

[0023] The power conversion system 10 is connected to the solar panel 2, which serves as a DC power source, and the AC power system 4. The power conversion system 10 is connected to the power system 4, for example, via a transformer 6. The solar panel 2 supplies DC power to the power conversion system 10. The power conversion system 10 converts the DC power input from the solar panel 2 into AC power and supplies the converted AC power to the power system 4. Alternatively, a battery can be used as the DC power source instead of the solar panel 2.

[0024] The power conversion system 10 supplies active power and some reactive power to the power system 4. For example, the power conversion system 10 enables the solar panel 2 to function as a distributed power source. Furthermore, the power conversion system 10 compensates for voltage fluctuations in the power system 4 by supplying reactive power. The power conversion system 10 operates by supplying active and reactive power, for example, during periods of high power generation from the solar panel 2, such as during the daytime.

[0025] In this example, the solar panel 2 is shown as a DC power source. In this example, the AC power supply to the power system 4 is three-phase AC. The power conversion system 10 converts the DC power into three-phase AC power and supplies it to the power system 4. The AC power supply to the power system 4 is not limited to three-phase AC; it can also be single-phase AC, etc. The AC voltage of the power system 4 can, for example, be 100V (RMS). The frequency of the AC power supply to the power system 4 can, for example, be 50Hz or 60Hz.

[0026] The power converter 12 has a pair of DC terminals d1 and d2 connected to the solar panel 2, and multiple AC terminals a1 to a3 connected to the power system 4. DC terminal d1 is the DC terminal on the high-voltage side, and DC terminal d2 is the DC terminal on the low-voltage side. Alternatively, DC terminal d1 can be set as the low-voltage side, and DC terminal d2 as the high-voltage side.

[0027] In this example, the power converter 12 has three AC terminals a1 to a3 corresponding to each of the three-phase AC power. For example, if the AC power in the power system 4 is single-phase AC power, the number of AC terminals may also be two. The number of AC terminals can be appropriately set according to the type of AC power, etc.

[0028] The power converter 12 converts the direct current (DC) from the solar panel 2 into alternating current (AC) corresponding to the power system 4 and supplies AC power to the power system 4. The power converter 12, for example, has multiple switching elements 12a and multiple rectifier elements 12b connected in anti-parallel to each switching element 12a. The power converter 12 converts DC power to AC power by switching each switching element 12a on and off. The power converter 12 is a so-called three-phase voltage-source inverter.

[0029] The power converter 12, for example, has six switching elements 12a connected in a three-phase bridge configuration. By turning each switching element 12a on or off, it converts direct current into three-phase alternating current. Each switching element 12a may be an arc-extinguishing semiconductor device, such as a GTO (Gate Turn-Off Thyristor) or an IGBT (Insulated Gate Bipolar Transistor).

[0030] A DC capacitor 14 is connected between a pair of DC terminals d1 and d2. The DC capacitor 14, for example, smooths the DC voltage of the solar panel 2. In other words, the DC capacitor 14 is a smoothing capacitor.

[0031] A filter circuit 16 is disposed between each AC terminal a1 to a3 and the power system 4. The filter circuit 16 is connected to each AC terminal a1 to a3. The filter circuit 16 includes, for example, an inductor 16a and a capacitor 16b. The inductor 16a and capacitor 16b are provided, for example, for each phase of the AC power. The filter circuit 16 suppresses harmonic components of the AC power output from the power converter 12, making the output waveform closer to a sine wave.

[0032] The DC voltage detector 18 detects the DC voltage value Vdc of the DC capacitor 14. In other words, the DC voltage detector 18 detects the DC voltage value of the solar panel 2. Furthermore, the DC voltage detector 18 is connected to the control device 34 and inputs the detected DC voltage value Vdc into the control device 34.

[0033] A DC current detector 20 is located between the solar panel 2 and the power converter 12. The DC current detector 20 detects a DC current value Idc, which represents the magnitude of the DC current input to the power converter 12. The DC current detector 20 is connected to the control device 34 and inputs the detected current value to the control device 34.

[0034] Each AC voltage detector 22a-22c is connected to each AC terminal a1-a3 via filter circuit 16. Each AC voltage detector 22a-22c detects the voltage value of the AC power output from power converter 12. In other words, each AC voltage detector 22a-22c detects the AC voltage value of power system 4. For example, each AC voltage detector 22a-22c detects the voltage value (phase voltage) of each phase of the three-phase AC power. Each AC voltage detector 22a-22c is connected to control device 34 and inputs the detected voltage value to control device 34.

[0035] Each AC current detector 24a-24c is located between the filter circuit 16 and the power system 4. Each AC current detector 24a-24c detects the current value of the AC power output from the power converter 12. In other words, each AC current detector 24a-24c detects the current value of the AC current in the power system 4. Each AC current detector 24a-24c detects the current value (phase current) of each phase of the three-phase AC power. Each AC current detector 24a-24c is connected to the control device 34 and inputs the detected current value into the control device 34.

[0036] Each DC switch 26a and 26b is located between the solar panel 2 and the power converter 12. Each DC switch 26a and 26b may also be manually operated. Each DC switch 26a and 26b is normally in the ON state, and will automatically disconnect in the event of certain abnormalities through the action of the control device 34, etc.

[0037] Each AC switch 28a to 28c is located between the power system 4 and the power converter 12. When the voltage value detected by the AC voltage detectors 22a to 22b is considered equal to the terminal voltage of the power converter side of the transformer 6 detected by the transformer-side voltage detector (not shown) within a specified range, each AC switch 28a to 28c is automatically turned on, for example, by the operation of the control device 34.

[0038] Each DC switch 26a, 26b and each AC switch 28a-28c is disconnected, for example, during maintenance, thereby disconnecting the power converter 12 from the solar panel 2 and the power system 4. The power converter 12 is then connected to the solar panel 2 and the power system 4 by turning on each DC switch 26a, 26b and each AC switch 28a-28c.

[0039] The control device 34 controls the operation of the power converter 12. The control device 34 controls the power conversion performed by the power converter 12. The control device 34 is connected, for example, to the gate signal terminal of each switching element 12a. The control device 34 controls the power conversion performed by the power converter 12 by controlling the opening / closing of each switching element 12a.

[0040] The control device 34 is configured to receive various data from the power conversion system 10. For example, the control device 34 receives DC voltage value Vdc data from the DC voltage detector 18. For example, the control device 34 receives DC current value Idc data from the DC current detector 20. For example, the control device 34 receives the voltage value (phase voltage) data of each phase of the three-phase AC power from each AC voltage detector 22a-22c. For example, the control device 34 receives the current value (phase current) data of each phase of the three-phase AC power from each AC current detector 24a-24c.

[0041] The external storage device 50 is detachably mounted to the control device 34. The external storage device 50 is configured to exchange data with the control device 34.

[0042] The upper-level monitoring device 11 is configured to send and receive data with the control device 34.

[0043] During the operation of the power system, the control device 34 receives data such as current, voltage, frequency, and temperature from the power conversion system 10. In the event of a fault in the power conversion system 10, the control device 34 stores this data in the external storage device 50. In the event of a fault in the power conversion system 10, the control device 34 transmits this data to the upper-level monitoring device 11. The upper-level monitoring device 11 monitors the status of the power converter 12 based on this data.

[0044] The control device 34 enables the data to be stored in the external storage device 50.

[0045] Next, use Figure 2 The installation method of external storage device 50 is explained.

[0046] Figure 2 This is a block diagram illustrating the installation method of an external storage device for a control device of a power conversion system in Embodiment 1.

[0047] like Figure 2 As shown, the manufacturer purchases a conventional external storage device 50. Then, the manufacturer uses the functions of the operating system of a conventional desktop personal computer or other first terminal device 60 to format the external storage device 50. As a result, the external storage device 50 is divided into an area corresponding to the file system applied to the conventional personal computer or other terminal device and a blank area. At this time, browsing software and other data are configured in the area corresponding to the file system applied to the conventional personal computer or other terminal device.

[0048] The manufacturer then installs the external storage device 50 onto the control device 34. The user or manufacturer then initializes the external storage device 50. As a result, a unique format is applied to the empty areas of the external storage device 50, which does not use the file system typically used on personal computers and other terminal devices.

[0049] After the control device 34 stores various data from the power conversion system 10 into the external storage device 50, the user or manufacturer removes the external storage device 50 from the control device 34. Then, the user or manufacturer installs the external storage device 50 into a second terminal device 70, such as a typical laptop computer. Afterwards, the user or manufacturer uses the second terminal device 70 and the data from the browsing software stored in the external storage device 50 to browse a bank list recorded in a unique format that is not visible in the normal operating software.

[0050] Users or manufacturers can use the second terminal device 70 as needed to browse lists of various data from the power conversion system 10 using browsing software stored in the external storage device 50, and export selected data in tracefile format. Users or manufacturers can then display the content corresponding to this data using conventional display tools.

[0051] Next, use Figure 3 The operation of the control device 34 will be explained.

[0052] Figure 3 This is a diagram illustrating the operation of the control device of the power conversion system in Embodiment 1.

[0053] like Figure 3 As shown, the control device 34 includes a data receiving unit 34a, an external transceiver unit 34b, and a data control unit 34c.

[0054] The data receiving unit 34a receives various data from the power conversion system 10. The external transceiver unit 34b transmits and receives various data between the external upper-level monitoring device 11 and the control device 34. For example, the data control unit 34c is an industrial-grade built-in microcomputer with a small program capacity. The data control unit 34c controls the processing of various data.

[0055] For example, the data control unit 34c writes the data received by the data receiving unit 34a into the external storage device 50. For example, the data control unit 34c reads the data stored in the external storage device 50 and sends the data to the upper monitoring device 11 via the external transceiver unit 34b through the industrial communication protocol.

[0056] Next, use Figure 4 A summary of the areas of the external storage device 50 is provided.

[0057] Figure 4 This is a diagram illustrating the outline of the area of ​​the external storage device for the control device of the power conversion system in Embodiment 1.

[0058] like Figure 4As shown, the external storage device 50 is divided into multiple file storage areas 50a, file management areas 50b, and standard format areas 50c.

[0059] Multiple file storage areas 50a store various data from the power conversion system 10. These multiple file storage areas 50a are in a circular buffer format. For example, the multiple file storage areas 50a respectively store data for "BANK Information (Index) (BANK: Library)," "Status Change History," "Tracking Header," and "Tracking Data."

[0060] File management area 50b manages data that uses a format that is not applied to the file system of a typical personal computer or other terminal device as the storage format for data in multiple file storage areas 50a. For example, file management area 50b stores "settings" and multiple "BANK attributes" data.

[0061] For example, the data to be "set" includes "identification code", "number of circular buffer banks", "number of tracking CHs / banks", "number of tracking points / CHs", and "waveform data byte size".

[0062] For example, the data for the "BANK attribute" includes "BANK information (index)," "record date and time," "trigger date and time," and "trigger item."

[0063] Standard format area 50c corresponds to the file system used in typical personal computers and other terminal devices. Standard format area 50c stores data related to "browser software," "runtime," and "middleware" used in typical personal computers and other terminal devices.

[0064] The "browser software" data refers to the data of the browser software used to read data stored in multiple file storage areas 50a from the terminal device. The "runtime" data refers to the runtime used when the terminal device reads data stored in the multiple file storage areas 50a. The "middleware" data refers to the middleware used when the terminal device reads data stored in the multiple file storage areas 50a.

[0065] According to Embodiment 1 described above, a unique format is applied. Compared to storage using a conventional file system, the program size is reduced when stored in the unique format. Therefore, even small programs can be written to the data from the power conversion system 10.

[0066] Furthermore, the external storage device 50 stores data from the power conversion system 10 in a circular buffer format. Therefore, even when the storage capacity of the external storage device 50 is limited, the latest data can still be written.

[0067] Furthermore, the external storage device 50 stores data for the browsing software applied to the terminal device. Therefore, the terminal device can use the browsing software to perform processing such as displaying lists of data from the power conversion system 10.

[0068] Furthermore, the external storage device 50 stores data related to the operating time of the terminal device. Therefore, the terminal device can more reliably perform tasks such as listing data from the power conversion system 10 using browsing software.

[0069] Furthermore, the external storage device 50 stores data for middleware used in the terminal device. Therefore, the terminal device can use browsing software to perform tasks such as displaying lists of data from the power conversion system 10.

[0070] Furthermore, the control device 34 sends the data stored in the external storage device 50 to the upper-level monitoring device 11. At this time, the control device 34 can send data written to at least one of the multiple file storage areas 50a of the external storage device 50 according to a format that does not use the file system format applied to the terminal device. As a result, the upper-level monitoring device 11 can appropriately obtain the status information of the power conversion system 10.

[0071] Furthermore, the external storage device 50 of Embodiment 1 can also be used as a control device for a power converter that converts AC to DC.

[0072] Next, use Figure 5 An example of the upper-level monitoring device 11 will be explained.

[0073] Figure 5 This is a hardware configuration diagram of a supervisory control device that transmits and receives data with the control device of the power conversion system in Implementation Method 1.

[0074] The functions of the upper-level monitoring device 11 can be implemented through processing circuitry. For example, the processing circuitry includes at least one processor 100a and at least one memory 100b. For example, the processing circuitry includes at least one dedicated hardware 200.

[0075] When the processing circuit includes at least one processor 100a and at least one memory 100b, the functions of the host monitoring device 11 are implemented by software, firmware, or a combination of software and firmware. At least one of the software and firmware is described as a program. At least one of the software and firmware is stored in at least one memory 100b. The at least one processor 100a implements the functions of the host monitoring device 11 by reading and executing the program stored in the at least one memory 100b. The at least one processor 100a is also referred to as a central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. For example, the at least one memory 100b is a non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, EEPROM, disk, floppy disk, optical disk, compact disk, mini-disk, DVD, etc.

[0076] When the processing circuit has at least one dedicated hardware 200, the processing circuit is implemented, for example, by a single circuit, a composite circuit, a programmable processor, a parallel programmable processor, an ASIC, an FPGA, or a combination thereof. For example, each function of the host monitoring device 11 is implemented by a separate processing circuit. For example, each function of the host monitoring device 11 is implemented uniformly by a processing circuit.

[0077] The functions of the upper-level monitoring device 11 can be partially implemented by dedicated hardware 200 and partially implemented by software or firmware. For example, the function of monitoring the status of the power conversion system 10 can be implemented by a processing circuit as dedicated hardware 200, while functions other than monitoring the status of the power conversion system 10 can be implemented by at least one processor 100a reading and executing a program stored in at least one memory 100b.

[0078] Thus, the processing circuit implements the various functions of the upper-level monitoring device 11 through hardware 200, software, firmware, or a combination thereof.

[0079] Although not illustrated, the functions of the first terminal device 60 are implemented using the same processing circuitry as that of the upper-level monitoring device 11. Similarly, the functions of the second terminal device 70 are implemented using the same processing circuitry as that of the upper-level monitoring device 11.

[0080] Industrial availability

[0081] As described above, the external storage device for the control device of the power conversion system and the control device of the power conversion system of this application can be used in power systems.

[0082] Explanation of reference numerals in the attached figures

[0083] 2 Solar panel, 2a Output terminal, 2b Output terminal, 4 Power system, 6 Transformer, 10 Power conversion system, 11 Upper-level monitoring device, 12 Power converter, 12a Switching element, 12b Rectifying element, 14 DC capacitor, 16 Filter circuit, 16a Inductor, 16b Capacitor, 18 DC voltage detector, 20 DC current detector, 22a-22c AC voltage detector, 24a-24c AC current detector, 26a, 26b DC switch (DC circuit breaker), 28a-28c AC switch (AC circuit breaker), 34 Control device, 34a Data receiving unit, 34b External transceiver unit, 34c Data control unit, 50 External storage device, 50a File storage area, 50b File management area, 50c Standard format area, 60 First terminal device, 70 Second terminal device.

Claims

1. An external storage device for a control apparatus of a power conversion system, the control apparatus comprising an industrial-grade built-in microcomputer with limited program capacity, characterized in that the external storage device for the control apparatus of the power conversion system comprises: Multiple file storage areas, each storing data from the power conversion system; and The file management area manages data that is configured not to use the file system format applied to the terminal device as the storage format for the data in the plurality of file storage areas; The file management area stores configuration data and multiple BANK attribute data. The configuration data includes the identification code, the number of circular buffer banks, the number of tracking channels in each bank, the tracking count in each channel, and the waveform data byte size. Each of the BANK attribute data includes BANK information for the index, the record date and time of the record data, the trigger date and time, and the trigger item.

2. The external storage device for the control device of the power conversion system as described in claim 1, The file management area manages the following data, which is formatted as a circular buffer as the storage format for the data in the multiple file storage areas.

3. The external storage device for the control device of the power conversion system as described in claim 1, The external storage device of the control device for the power conversion system has a standard format area that stores data of browsing software used to read data stored in the plurality of file storage areas from a terminal device.

4. The external storage device for the control device of the power conversion system as described in claim 2, The external storage device of the control device for the power conversion system has a standard format area that stores data of browsing software used to read data stored in the plurality of file storage areas from a terminal device.

5. The external storage device for the control device of the power conversion system as described in claim 3, The standard format area storage stores runtime data used when reading data stored in the plurality of file storage areas from a terminal device.

6. The external storage device for the control device of the power conversion system as described in claim 4, The standard format area storage stores runtime data used when reading data stored in the plurality of file storage areas from a terminal device.

7. The external storage device for the control device of the power conversion system as described in claim 3, The standard format area storage stores middleware data used when reading data stored in the plurality of file storage areas from a terminal device.

8. The external storage device for the control device of the power conversion system as described in claim 4, The standard format area storage stores middleware data used when reading data stored in the plurality of file storage areas from a terminal device.

9. A control device for a power conversion system, comprising: The data receiving unit receives data from the power conversion system; and The data control unit writes the data received by the data receiving unit into the plurality of file storage areas based on the format set in the file management area according to any one of claims 1 to 8.

10. The control device for the power conversion system as described in claim 9, It has an external transceiver unit that can send and receive data with external devices. The data control unit reads data written into at least one of the plurality of file storage areas according to the format set in the file management area, and causes the external transceiver unit to send the data to the upper-level monitoring device.

Images