KR101741755B1 - System for failure check and automatic recovery of rtu - Google Patents

Abstract

The present invention relates to a system for diagnosing a breakdown of an RTU and automatically recovering the RTU. The system monitors an operation state of an RTU connected to an inverter in a facility for generating electricity by solar light, wind power, or the like to transmit electricity generation information to a management server disposed in a remote place, and automatically recovers the RTU when a breakdown occurs in the RTU. The system according to the present invention monitors a breakdown by monitoring an operation state of the RTU installed in an electrical chamber of a solar light or wind power generation facility to automatically recover the RTU when diagnosing a breakdown, and comprises: an inverter (10) for converting direct current electricity generated by solar light or wind power into alternating current electricity; an RTU (20) connected with the inverter (10), collecting electricity generation information of the inverter (10), and transmitting the information to a central management server (200) disposed in a remote place; a sharing device (30) and a modem (40) for relaying internet communications between the RTU (20) and the central management server (200); and an RTU breakdown diagnosing and automatically recovering device (100) for supplying operation electricity to the RTU, the sharing device (30), and the modem (40), diagnosing a breakdown of the RTU (20) by analyzing data packets transmitted and received through RS-485 communications between the RTU (20) and the inverter (10), and managing recovery by resetting electricity supplied to the RTU (20) when a breakdown of the RTU (20) is diagnosed. States of an RTU, an inverter, a sharing device, and a modem are monitored in real time, automatic recovery can be ensured when a breakdown is diagnosed.

Description

SYSTEM FAILURE CHECK AND AUTOMATIC RECOVERY OF RTU [0002]

The present invention relates to a fault diagnosis and automatic restoration system of an RTU, and more particularly, to an RTU connected to an inverter in a facility that generates electricity by sunlight or wind power and monitors the operation state of an RTU transmitting power generation information to a remote management server, The present invention relates to a fault diagnosis and automatic restoration system of an RTU that can automatically recover a fault of an RTU when a fault occurs.

The importance of environmentally friendly new and renewable energy has been emphasized due to the depletion of fossil energy resources such as coal and oil and environmental pollution problems. Solar power and wind power are attracting attention as such environmentally friendly new renewable energy. In particular, solar power generation has been widely used as alternative energy since many technologies are developed and commercialized.

Generally, such a photovoltaic power generation facility includes a solar cell that receives sunlight to produce electricity, an inverter that converts DC electricity generated from the solar cell into AC power, which is a commercial power, and a storage battery An RTU (Remote Terminal Unit) connected to the inverter for transmitting power production information to a remotely located management server, and a control unit for controlling the power generation A power generation facility is controlled and managed, and a central management server is provided,

These solar power generation facilities must produce electricity stably, so that prompt action should be taken in the event of a failure. However, since the solar power generation facility is installed in a region where the solar power generation facility is large in size and can receive a lot of sunlight, there is a problem that it is difficult to make an immediate diagnosis in the event of a failure and requires a lot of manpower, time, and cost to repair it. In particular, if the RTU that collects the power generation information generated by the inverter at the PV facility and transmits it to the remote management server fails, the remote management server can not confirm the power generation status. Therefore, There is a problem that the operation of the photovoltaic power generation facility is seriously disrupted because the development status of the facility can not be grasped.

Korean Registered Patent No. 10-1568667 (Registered on November 11, 2015)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the related art, and it is an object of the present invention to provide an RTU for monitoring the operation state of an RTU, Fault diagnosis and automatic restoration system that can diagnose faults and automatically recover them in the event of faults.

Another object of the present invention is to provide a fault diagnosis and automatic recovery system that can monitor the operation status of inverters, routers, and modems installed in the electric room of the power generation facility together with the RTU so that the fault can be automatically recovered have.

In order to achieve the above object, the fault diagnosis and automatic restoration system of the RTU according to the present invention includes a system for monitoring the operation state of the RTU installed in the electric room of a solar power or wind power generation facility to diagnose a fault, An inverter for converting a direct current power generated by sunlight or wind power into an alternating current power; An RTU connected to the inverter for collecting power generation information of the inverter and transmitting the collected information to a remote central management server; A router and a modem for relaying Internet communication between the RTU and the central management server; The operation power is supplied to the RTU, the router, and the modem, and the data packet transmitted / received between the RTU and the inverter through the RS-485 communication is analyzed to diagnose the failure of the RTU. And an RTU failure diagnosis and automatic restoration device that manages the RTU to be able to be restored by resetting it.

The RTU failure diagnosis and automatic recovery device includes a power supply unit for receiving a commercial AC power and converting the received AC power into a DC power used by an RTU, a router, and a modem; A power control unit for supplying and controlling the DC power converted by the power unit to the RTU, the router, and the modem, respectively; An RS-485 communication module connected to the RS-485 communication connected between the RTU and the inverter, and a LAN communication module performing Internet communication with the router and the modem; The data packet transmitted / received between the RTU and the inverter is analyzed through the RS-485 communication to diagnose the failure of the RTU and the inverter, and the fault diagnosis information is transmitted to the central management server through the Internet communication when the RTU and the inverter are fault- A fault diagnosis and automatic recovery unit including an RTU management module and an inverter management module for managing the RTU to be reset by resetting the RTU in the event of a fault diagnosis of the RTU; And a memory unit for storing recovery information.

Here, the RTU management module of the fault diagnosis and automatic recovery unit diagnoses that the RTU is failed when the data request protocol for requesting the status information of the inverter through the RS-485 communication is not transmitted for the time set to the inverter in the RTU , The inverter management module transmits the data request protocol from the RTU to the inverter through the RS-485 communication, and if the inverter status protocol that responds to the inverter status information is not transmitted during the time set in the inverter by the RTU, .

In addition, the failure diagnosis and automatic recovery unit may periodically execute a communication test for a router or a modem connected through Internet communication to diagnose the failure of the router or the modem. If diagnosed as a failure, A router management module and a modem management module for resetting and restoring the operation power of the router, and transmitting the failure diagnostic information to a central management server located remotely via Internet communication.

Meanwhile, if the failure diagnosis and automatic recovery unit does not normally recover even if the reset operation for the device diagnosed as a failure is repeated a predetermined number of times, the failure diagnosis and automatic recovery unit stops the reset operation and requests the central management server for on- do.

In addition, the malfunction diagnosis and automatic restoration unit is provided with a power failure management module for supplying power to the RTU, the router, and the modem through the power control unit, when power failure occurs in the capacitors of the charging unit.

The failure diagnosis and automatic restoration system of the RTU according to the present invention can diagnose the failure state of the RUT in real time by communicating with the RTU, and can also monitor the state of the inverter, the router and the modem connected to the RTU in real time, In the event of a fault diagnosis, the power supplied to the apparatus is reset and automatically restored. In addition, according to the present invention, when a power failure occurs, a power source charged in a battery is supplied to each device, so that each device can be normally operated even during a power failure.

FIG. 1 is an overall power and network diagram of a fault diagnosis and automatic restoration system of an RTU according to the present invention.
FIG. 2 is a power supply line connection diagram of the fault diagnosis and automatic restoration system of the RTU according to the present invention,
FIG. 3 is a communication line connection diagram of the fault diagnosis and automatic restoration system of the RTU according to the present invention,
FIG. 4 is a block diagram of an RTU failure diagnosis and automatic recovery apparatus according to the present invention;
5 is a flowchart illustrating an operation of the RTU failure diagnosis and automatic restoration system according to the present invention.

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

FIG. 1 shows an overall power supply and network connection diagram of the fault diagnosis and automatic restoration system of the RTU according to the embodiment of the present invention. FIG. 2 shows a power supply line of the fault diagnosis and automatic restoration system of the RTU. Shows the communication line of fault diagnosis and automatic restoration system of RTU.

As shown in FIGS. 1 to 3, the fault diagnosis and automatic restoration system of the RTU according to the present invention includes an inverter 10 that receives DC electricity from a solar cell that generates electricity through sunlight and converts the DC electricity into an AC power, An RTU 20 connected to the inverter 10 to collect power generation information of the inverter 10 and transmit the collected information to a remote central management server 200, RTU fault diagnosis and diagnosis for monitoring and diagnosing a fault state by monitoring the operation statuses of the inverter 10, the RTU 20, the router 30 and the modem 40, And an automatic restoration apparatus (100).

The inverter 10, the RTU 20, the router 30 and the modem 40, and the RTU failure diagnosis and automatic recovery apparatus 100 are installed in the electric room of the photovoltaic power generation facility. The RTU 20 includes an inverter 10 to the central management server 200 via the RS-485 communication and obtains the electrical production information of the inverter 10 and transmits it to the central management server 200 via the router 30 and the modem 40 via the Internet . The modem 40 is a communication device that establishes Internet communication with the Internet network. The router 30 is a communication sharing device that allows an Internet network connected through the modem 40 to be shared by a plurality of devices. (Internet Protocol (IP) such as Datagram Protocol (TCP) or Transmission Control Protocol (TCP)).

The RTU fault diagnosis and automatic restoration apparatus 100 according to the present invention supplies necessary operating power to the RTU 20, the router 30 and the modem 40, And monitors the operation state of the modem 40 to diagnose a failure state. When the failure of the router 30 or the modem 40 is diagnosed, the power supplied to the device is reset and managed to be recovered. The RTU fault diagnosis and automatic restoration apparatus 100 is connected to the RS-485 that performs communication between the inverter 10 and the RTU 20 to monitor the operation states of the RTU 20 and the inverter 10 , And if the failure of the RTU 20 is diagnosed, the power supplied to the RTU 20 is reset and restored. When the failure of the inverter 10 is diagnosed, the inverter failure diagnosis information is transmitted to the central management server 200 via the Internet communication .

In the embodiment of the present invention, the RTU 20 is connected to the RTU 20 and the router 30 in the automatic restoration apparatus 100. In this case, ) And the modem 40 are diagnosed to have failed, the power supply to the device is reset so as to be automatically restored. If the reset is not restored by one reset, the reset is repeatedly performed within three times. If the reset is not restored even three times, the recovery operation is stopped and the central management server 200 is requested to perform a field check through the Internet communication do. On the other hand, since the inverter 10 can not be restored to the reset state, if it is diagnosed that the inverter 10 has failed, the inverter failure diagnosis information is transmitted to the central management server 200 to request a field check.

4 is a block diagram of an RTU failure diagnosis and automatic restoration apparatus according to an embodiment of the present invention.

4, the RTU failure diagnosis and automatic restoration apparatus 100 according to the present invention includes a setting display unit 120 for setting and displaying an operating environment of the RTU failure diagnosis and automatic restoration apparatus 100, A fault diagnosis and automatic restoration unit 140 for diagnosing and restoring a failure of the RTU 20, the inverter 10, the router 30, and the modem 40; a communication unit 130 for performing RS- A power control unit 150 for controlling power supply of the RTU 20, the router 30 and the modem 40; a memory unit 160 for storing a diagnosis result and recovery information; A charging unit 170, a power supply unit 180 for supplying power to the components, and a control unit 110 for controlling operations of the components.

The communication unit 130 is a communication device that communicates with the RTU 20 to be managed, the inverter 10, the router 30 and the modem 40. The communication unit 130 includes an inverter 10 and an RTU 20 An RS-485 communication module 131 for performing RS-485 communication in parallel with an RS-485 communication line connected between the router 30 and the modem 40, and a LAN communication module 132 are provided.

The fault diagnosis and automatic restoration unit 140 is a program that is driven by the control unit 110 and monitors the operation of the RTU 20, the inverter 10, the router 30 and the modem 40 to diagnose and repair the fault An inverter management module 142, a router management module 143, a modem management module 144, and a power failure management module 145 are provided in the fault diagnosis and automatic restoration unit 140 have.

The RTU management module 141 analyzes a data packet between the RTU 20 and the inverter 10 through RS-485 communication to diagnose the failure state of the RTU 20, And controls the power supplied to the RTU 20 through the power control unit 150 to reset the RTU 20 to be restored. In general, the RTU 20 periodically transmits a data request protocol requesting inverter status information to the inverter 10 through RS-485 communication, and the inverter 10 transmits the inverter status protocol in response thereto. In the embodiment of the present invention, the RTU management module 141 analyzes the data request protocol of the RTU 20 through the RS-485 communication to diagnose whether the RTU 20 normally operates. If the RTU 20 The data request protocol is not transmitted to the inverter 10 within the set time and the RTU 20 is diagnosed as having failed and the RTU 20 is reset and restored and the RTU failure diagnosis and recovery information is transmitted to the central management server 200 .

The inverter management module 142 is a program module for analyzing data packets between the RTU 20 and the inverter 10 via RS-485 communication and diagnosing the fault state of the inverter 10, 142 analyzes the inverter status protocol transmitted from the inverter 10 to the RTU 20 through the RS-485 communication and diagnoses whether the inverter 10 is operating normally. That is, after the RTU 20 transmits the data request protocol to the inverter 10, the inverter management module 142 does not transmit the inverter status protocol for a predetermined time in response to the data request protocol in the inverter 10, And transmits the inverter failure diagnosis information to the central management server 200 to request the on-site inspection.

The router control module 143 and the modem control module 144 diagnose the failure state of the router 30 and the modem 40 connected via the Internet and detect the failure state of the router 30 or the modem 40, And restores the router 30 or the modem 40 via the communication network 150. FIG. The router control module 143 and the modem management module 144 periodically execute a communication test (ping test) as a network checking method to diagnose whether or not the router 30 and the modem 40 are faulty In case of diagnosis of a failure, the device is restored through reset and the failure diagnosis information and recovery information are transmitted to the central management server 200. The RTU management module 141, the router management module 143, and the modem management module 144 perform a reset until the device diagnosed as a failure is normally restored. However, even if the device is reset three times, If it is not normally restored, the reset operation is stopped and the central management server 200 is requested to perform a field check.

The power failure management module 145 supplies the power charged in the charging unit 170 to the RTU 20, the sharer 30 and the modem 40 when the power failure occurs, until the power is normally supplied to the RTU 20 and the router 30 and the modem 40 so that they can operate normally. In addition, the power failure management module transmits power failure occurrence information to the central management server 200 when a power failure occurs.

The power supply control unit 150 is a power supply control unit that supplies and controls the power supplied through the power supply unit 180 to the RTU 20, the router 30 and the modem 40, And controls power supply to the RTU 20, the router 30, and the modem 40 under the control of the diagnosis and automatic restoration unit 140.

The memory unit 160 is a storage device that stores failure diagnosis information and recovery information of a device that is diagnosed and recovered by the failure diagnosis and automatic recovery unit 140. The charging unit 170 is connected to the power supply unit 180 And supplies power stored in the storage battery to each device through the power control unit 150 when the storage battery is charged. In the embodiment of the present invention, the battery included in the charging unit 170 has a capacity capable of supplying power to the RTU 20, the router 30, and the modem 40 for about one hour when a power failure occurs.

The power supply unit 180 converts an AC 220V commercial power supplied from the outside into DC power required by the respective components of the RTU failure diagnosis and automatic recovery apparatus 100 and supplies power to the AC And an AC / DC converter for converting 220V to DC power. In the embodiment of the present invention, the AC / DC converter provided in the power supply unit 180 converts AC 220V to DC 5V, 9V, or 12V required by the RTU 20, the router 30 and the modem 40 And supplies it to each device through the power control unit 150. [

Hereinafter, a process of diagnosing and recovering the failure of the RTU 20, the inverter 10, the router 30, and the modem 40 through the RTU failure diagnosis and automatic restoration system will be described.

5 is a flowchart illustrating an operation of the RTU failure diagnosis and automatic restoration system according to an embodiment of the present invention.

Steps S110 and S110: First, the RTU failure diagnosis and automatic restoration apparatus 100 is connected to the RS-485 communication between the inverter 10 and the RTU 20 via RS-485 communication, The power supply unit 180 converts the AC 200V supplied from the outside into the DC power through the AC / DC converter in step S100 and controls the power supply control unit 150 to connect the RTU 20 The router 30, and the modem 40 (S110).

When the power is supplied and the RTU 20, the router 30 and the modem 40 are normally operated, the RTU failure diagnosis and automatic fault diagnosis and automatic recovery unit The RTU management module 141 and the inverter management module 142 receive and analyze the RS-485 communication data packet transmitted and received between the RTU 20 and the inverter 10.

Steps S130, S131 and S141: If the data request protocol transmitted from the RTU 20 to the inverter 10 is not found during the set time, it is determined that the RTU 20 has failed (S130) (S131), and transmits the RTU failure diagnosis information and recovery information to the central management server 200 via the Internet communication (S141). If the RTU 20 is not restored normally, the reset is performed up to three times. After that, the reset is stopped and the central management server 200 is requested to perform a field check.

Steps S140 and S141: If the inverter status protocol transmitted from the inverter 10 to the RTU 20 in response to the data request protocol normally transmitted from the RTU 20 to the inverter 10 is found, , The inverter management module 142 determines that the inverter 10 has failed (S140) and transmits the inverter failure diagnosis information to the central management server 200 via the Internet communication so that the on-site inspection can be performed (S141 ).

The router management module 143 and the modem management module 144 of the failure diagnosis and automatic restoration unit 140 may be connected to the router 30 (step S 150), S160, and S161 together with the failure diagnosis of the RTU 20 and the inverter 10 (S150), and diagnoses whether there is a failure of the router 30 and the modem 40 according to the ping response (S160). If the router 30 or the modem 40 is diagnosed as failed, the router 30 or the modem 40 diagnosed as a failure is automatically reset and the router 30 or the modem 40 And restoration information to the central management server 200 through Internet communication (S161). If the router 30 and the modem 40 are not reset normally, the reset is performed up to three times. After that, the reset is stopped and the central management server 200 is requested to perform a field check.

The power failure management module 145 supplies the power charged in the battery of the charger 170 to each device through the power source controller 150 and supplies power to the power source controller 150. [ (S171) until each of the devices is normally supplied. In addition, the power failure management module 145 transmits the power failure information to the central management server 200 so that subsequent actions can be performed.

Step S180: The fault diagnosis process and the automatic restoration process for the RTU 20, the inverter 10, the router 30, and the modem 40 are repeated because the system is terminated.

As described above, the fault diagnosis and automatic restoration system of the RTU according to the present invention includes an inverter 10 for converting a power generated in a solar power generating facility into an AC power source, 200 and the router 30 and the modem 40 relaying the Internet communication to diagnose the failure and to quickly recover the device through a reset upon a failure diagnosis.

Meanwhile, in the above-mentioned embodiments, the fault diagnosis and automatic restoration system of the RTU are described as being applied to the photovoltaic power generation facilities. However, it is obvious that the present invention can be applied to wind power generation facilities and other power generation facilities as well as solar power generation facilities. In the above-described embodiment, the malfunction of the router 30 and the modem 40 is diagnosed through a failure diagnosis of the RTU failure diagnosis and automatic restoration apparatus 100 and a ping test by the automatic restoration unit 140, And analyzing packets transmitted and received between the RTU 20 and the router 30 and the modem 40. [ For example, before transmitting information from the RTU 20 to the central management server 200, an authentication packet is sent to the central management server 200 to confirm whether the central server 200 can receive the information, and then the data packet is transmitted. If the RTU 20 The authentication packet is transmitted between the router 30 and the modem 40. If the authentication packet is not transmitted between the router 30 and the modem 40, 40, if the response packet is not received, it can be diagnosed as failure of the modem 40 or the central management server 200.

As described above, the present invention is not limited to the above-described embodiments, and various changes and modifications within the scope of the technical idea of the present invention and equivalents of the claims defined below may be made by a person having ordinary skill in the art to which the present invention belongs. And modifications may be made.

10: Inverter 20: RTU (Remote Terminal Unit)
30: router 40: modem
100: RTU fault diagnosis and automatic restoration device 110:
120: setting display unit 130: communication unit
131: RS-485 communication module 132: LAN communication module
140: Fault diagnosis and automatic restoration unit 141: RTU management module
142: inverter management module 143: router management module
144: Modem management module 145: Power management module
150: power supply control unit 160: memory unit
170: Charging unit 180: Power supply unit
200: Central Management Server

Claims (6)

A central management server 200 connected to the inverter 10 for collecting electric power production information of the inverter 10 and connected to the remote control unit 200, A router 30 and a modem 40 for relaying Internet communication between the RTU 20 and the central management server 200 and a modem 40 for transmitting Internet communications between the RTU 20 and the router 30, (100) including an RTU failure diagnosis and automatic recovery device (100) for supplying operating power to the RTU (20) and diagnosing the failure of the RTU (20) As a diagnostic and automatic recovery system,
The RTU fault diagnosis and automatic restoration apparatus 100 includes a power supply unit 180 that receives commercial AC power and converts the commercial AC power into DC power used by the RTU 20, the router 30, and the modem 40; A power control unit 150 for supplying and controlling the DC power converted by the power unit 180 to the RTU 20, the router 30, and the modem 40; An RS-485 communication module 131 connected to the RS-485 communication connected between the RTU 20 and the inverter 10, and a LAN communication module 13 for performing Internet communication with the router 30 and the modem 40. [ A communication unit 130 having a communication unit 132; The data packet transmitted and received between the RTU 20 and the inverter 10 through the RS-485 communication is analyzed to diagnose the failure of the RTU 20 and the inverter 10, and the RTU 20 and the inverter 10 An RTU management module 141 for managing fault management information to be transmitted to the central management server 200 through the Internet communication and resetting the RTU 20 during a fault diagnosis of the RTU 20, ) And an inverter management module (142); And a memory unit 160 for storing failure information and recovery information of the RTU 20 that are recognized through the failure diagnosis and automatic recovery unit 140,
The RTU management module 141 of the fault diagnosis and automatic recovery unit 140 sets the data request protocol for requesting the status information of the inverter 10 through the RS-485 communication to the inverter 10 in the RTU 20 The inverter management module 142 diagnoses that the RTU 20 has failed because the data request protocol is transmitted from the RTU 20 to the inverter 10 via the RS-485 communication, (10) is not transmitted for a time set by the inverter (10) to the RTU (20) in response to the status information of the inverter (10) And automatic recovery system.
delete delete The method according to claim 1,
The fault diagnosis and automatic recovery unit 140
Periodically executes a communication test for the router 30 or the modem 40 connected via the Internet communication to diagnose the failure of the router 30 or the modem 40. If the failure is diagnosed, A router control module 143 for resetting and restoring the operation power of the router 30 or the modem 40 via the Internet and communicating the failure diagnostic information to the central management server 200 located remotely via Internet communication, And a module (144).
The method according to claim 1 or 4,
If the failure diagnosis and automatic recovery unit 140 does not normally recover the reset operation for the device diagnosed as a failure for a set number of times, the failure diagnosis and automatic recovery unit 140 stops the reset operation and transmits the reset operation to the central management server 200 And a fault diagnosis and automatic restoration system of the RTU.
The method according to claim 1,
The power supply controller 150 supplies power to the RTU 20, the router 30, and the modem 40. The power supply controller 150 is connected to the fault diagnosis and automatic recovery unit 140, And a power failure management module (145) that is connected to the power failure management module (145).

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