CN204761158U - Case of supporting photovoltaic power's electric energy quality on -line monitoring becomes measurement and control device - Google Patents

Abstract

A box-changing measurement and control device that supports on-line monitoring of power quality of photovoltaic power sources. The communication CPU module (4) includes a first ARM core CPU industrial processor (12) and an interface module (15), including electrical ports and optical fiber interfaces. , Ethernet interface, RS485 serial port and GPS interface, the interface module (15) is connected to the first ARM core CPU industrial processor (12), and the first ARM core CPU industrial processor (12) will receive the signal Process and communicate with the photovoltaic power supply system; the power quality analysis module (8) includes a second ARM core CPU industrial processor (18), a dual-port memory (19), and a DSP core CPU industrial processor (20), wherein the The DSP core CPU industrial processor (20) monitors and calculates power quality data, and exchanges data with the second ARM core CPU industrial processor (18) through the dual port memory (19), and the second ARM core The CPU industrial processor (18) performs data storage and harmonic analysis.

Description

A box-type transformer measurement and control device that supports on-line monitoring of power quality of photovoltaic power sources

technical field

The utility model relates to the field of photovoltaic power generation, in particular to a box-station measurement and control device supporting on-line monitoring of power quality of a photovoltaic power supply.

Background technique

In recent years, my country's new energy industry has developed rapidly, especially in the field of photovoltaic power generation. Due to the strong support of national policies, it has entered the stage of blowout high-speed development. In the process of development, related supporting facilities, especially box-type transformer-centered box-type transformer protection and measurement and control devices, most of the products have incomplete functions, limited information collection, low product function integration, and limited communication interfaces. At present, due to the limitation of device size, most of the box-type measurement and control devices have limited number of electrical quantity acquisition channels, fewer input acquisition channels, and communication interface only supports a small number of RS485 serial port functions.

In addition, due to factors such as weather, ambient temperature, and installation location of photovoltaic panels, the output power of photovoltaic power plants will vary, and the maximum rate of change may even exceed 10% of the rated value. The harmonics that are incorporated into the grid have an impact.

In the prior art, the Chinese patent CN204270079 discloses a measurement and control device for photovoltaic box change, which is composed of a remote monitoring component and a measurement and control component; the remote monitoring component includes a management and control structure, an Ethernet switch and an optical fiber ring network controller, Wherein, the Ethernet switch is respectively connected with the management and control structure and the optical fiber ring network controller; device connection. The patented measurement and control device does not require additional optical communication equipment (low cost, easy to manage), and realizes real-time monitoring of the box substation at the remote step-up station, meeting the operation and management requirements of the project with few people on duty. The defects of limited amount of information, low degree of integration of product functions, and limited communication interface.

Chinese patent CN204301873 discloses a box-type intelligent measurement and control system, the measurement and control system includes: a box-type intelligent measurement and control device for measuring and controlling the photovoltaic or wind power step-up transformer; An infrared sensor for temperature detection, the infrared sensor is closely aligned with the cable joint of the box-type intelligent measurement and control device; a single-chip microcomputer connected with the infrared sensor for receiving and processing the temperature signal of the cable joint; wherein , the intelligent measurement and control device of the box transformer is equipped with a temperature control module, and the single-chip microcomputer is connected to the temperature control module through an isolated communication circuit. It cannot solve the technical problems of all-round real-time monitoring, effective prevention and control of safety risks, and monitoring and analysis of power quality.

Therefore, all-round real-time monitoring of photovoltaic power supply, real-time monitoring of all parameters of power quality of power generation units, analysis of harmonics, inter-harmonics, and high-order harmonics, completion of grid-connected relay protection of photovoltaic power generation and improvement of device operation reliability and Adapting to various harsh environments is an urgent technical problem in this field.

Contents of the invention

The purpose of this utility model is to provide a box-type transformer measurement and control device supporting photovoltaic power supply to solve the technical problems of photovoltaic power supply adjustment difficulties, harmonic pollution, and power quality monitoring and analysis, and provide all-round real-time monitoring to effectively prevent and control safety risks .

The technical scheme adopted by the utility model provides a box-type transformer measurement and control device that supports on-line monitoring of power quality of a photovoltaic power supply, which includes a chassis and a backplane bus module, a power supply module, and a communication CPU module arranged in the chassis. components, power quality analysis module, AC module, input module and output module.

The backplane bus module is electrically connected to the power supply module, the communication CPU module, the power quality analysis module, the AC module, the input module and the output module.

The power supply module includes an AC power supply, a switching unit and a DC power supply. When the AC power supply is interrupted, the switching unit switches the DC power supply to maintain uninterrupted power supply. When the AC power supply resumes power supply, the switching unit switches off. back to the AC power supply.

The communication CPU module includes a first ARM core CPU industrial processor and an interface module, wherein the interface module including an electrical port, an optical fiber interface, an Ethernet interface, an RS485 serial port and a GPS interface is connected to the first ARM core CPU An industrial processor, the first ARM core CPU industrial processor processes the received signal and communicates with the photovoltaic power supply system.

The power quality analysis module includes a second ARM core CPU industrial processor, a dual-port memory, and a DSP core CPU industrial processor, wherein the DSP core CPU industrial processor monitors and calculates power quality data, and through the dual The port memory data is exchanged to the second ARM core CPU industrial processor, and the second ARM core CPU industrial processor performs data storage and harmonic analysis.

Both AC modules are equipped with current converters and voltage converters so that each AC module supports at least 6 voltages, 6 currents and 2 zero-sequence current collections.

The drive-in module is provided with strong current drive-in input contacts for collecting photovoltaic power drive-in signals.

The output module integrates 8 channels that can be programmed as relay outlets for the control of photovoltaic power sources.

Preferably, the interface module further includes a video surveillance module and a WIFI extension module.

Preferably, the DC power supply is a rechargeable battery and is equipped with a battery activation module.

Preferably, the chassis is an all-metal industrial control chassis with a backplane structure.

Preferably, the display module is configured with a touch screen.

Preferably, the DSP core CPU industrial processor is connected to the temperature control module through an isolated communication circuit.

Preferably, the DSP core CPU industrial processor is also provided with an alarm module, which is connected to the temperature control module and generates an alarm signal when the temperature of the cable joint exceeds the preset temperature of the temperature control module.

Preferably, the power quality analysis module is configured with a wireless communication module and a protection function module.

Preferably, the power quality analysis module is equipped with a communication management and photoelectric conversion module for the concentration and transmission of communication information.

Preferably, the power quality analysis module is equipped with a ferroelectric memory for recording information connected to the second ARM core CPU industrial processor, a clock circuit and an external watchdog circuit to ensure reliable operation of the program.

Preferably, the input module adopts a photoelectric isolation circuit input to reduce electromagnetic interference and protect internal circuits.

The box-station measurement and control device that supports online monitoring of power quality of photovoltaic power supplies realizes analog quantity acquisition, electrical quantity protection, non-electricity protection and communication functions. At the same time, the device integrates communication management, optical fiber ring network Input and transmit the data communication of the intelligent equipment in the power generation unit, as well as the video data transmission of the on-site video surveillance camera, realize the concentration and transmission of the communication information of the intelligent equipment belonging to the photovoltaic power generation sub-system, and access the system through the self-healing ring optical fiber Ethernet, and then Realize remote management and automatic monitoring of power generation units.

The utility model is characterized in that the measurement and control device monitors and analyzes the electric energy of the power generation unit, which performs real-time monitoring of all parameters of electric energy quality, analyzes harmonics, interharmonics, high-order harmonics, and data analysis of electric energy quality problems. The device of the utility model can complete photovoltaic power generation grid-connected relay protection, online monitoring and analysis of electric energy through collected data, and can also analyze according to collected electric energy data. It not only has complete functions, superior performance, and is easy to use, Moreover, in order to improve the operating reliability of the device, many comprehensive criteria combined with electrical and physical characteristics have been added in the design. The device is fully suitable for various harsh environments, and some technical indicators have reached the advanced level of international and domestic similar products.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of a box-station measurement and control device supporting online monitoring of power quality of a photovoltaic power supply according to a first embodiment of the present invention.

Fig. 2 is a schematic diagram of the structure inside the box of the box-station measurement and control device supporting on-line monitoring of power quality of photovoltaic power sources according to the second embodiment of the present invention.

Fig. 3 is a schematic diagram of the internal structure of a box-station measurement and control device supporting on-line monitoring of power quality of photovoltaic power sources according to a third embodiment of the present invention.

Among them, 1 is the chassis, 2 is the backplane bus module, 3 is the power supply module, 4 is the communication CPU module, 5 is the AC module, 6 is the input module, 7 is the output module, and 8 is the electric energy Quality analysis module, 9 for AC power supply, 10 for switching unit, 11 for DC power supply, 12 for the first ARM core CPU industrial processor, 13 for temperature control module, 14 for alarm module, 15 for interface module, 16 for current Converter, 17 is a voltage converter, 18 is a second ARM core CPU industrial processor, 19 is a dual-port memory, 20 is a DSP core CPU industrial processor, 21 is a video monitoring module, 22 is a WIFI expansion module, 23 is a battery Activation module, 24 is a wireless communication module, 25 is a protection function module, 26 is a communication management and photoelectric conversion module, 27 is a ferroelectric memory, 28 is a clock circuit, 29 is an external watchdog circuit.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further explained.

In the first embodiment of the present utility model, the box-changing measurement and control device supporting online monitoring of power quality of photovoltaic power supply includes a chassis 1 and a backplane bus module 2, a power supply module 3, and a communication CPU disposed in the chassis 1. Module 4, AC module 5, input module 6, output module 7 and power quality analysis module 8. The box-station measurement and control device that supports the online monitoring of the power quality of the photovoltaic power supply adopts an all-metal chassis 1 and adopts a modular structure inside. The chassis 1 may be a rectangular industrial control chassis. In one embodiment, the chassis 1 is an all-metal industrial control chassis with a backplane structure.

Fig. 1 is a schematic diagram of the internal structure of a box-station measurement and control device supporting online monitoring of power quality of a photovoltaic power supply according to a first embodiment of the present invention. Referring to FIG. 2 , the backplane bus module 2 is electrically connected to the power supply module 3 , the communication CPU module 4 , the AC module 5 , the input module 6 , the output module 7 and the power quality analysis module 8 .

The power supply module 3 includes an AC power supply 9, a switching unit 10 and a DC power supply 11. When the AC power supply 9 is interrupted, the switching unit 10 switches the DC power supply 11 to maintain uninterrupted power supply. When the AC power supply 9 is restored When supplying power, the switching unit 10 switches back to the AC power supply 9 for power supply. The power supply module 3 provides a working AC power supply 9 and a backup DC power supply 11 for the device, and the AC power supply 9 supports dual AC and DC power supply. The back-up DC power supply 11 is powered by a rechargeable storage battery. In one embodiment, the backup DC power supply 11 is powered by a lead storage battery. Once the AC power supply 9 is interrupted, the device automatically switches to the DC power supply 11 DC power supply mode through the switching unit 10 without disturbance; when the AC power supply 9 resumes power supply, the device automatically switches back to the AC power supply mode. During all power switching processes, the device can Continue to work normally.

In one embodiment, the DC power source 11 is a rechargeable battery and is equipped with a battery activation module 23 . The battery activation module 23 has the function of battery activation and maintenance, and can automatically activate the battery in two modes of timing and fixed period. The DC power supply 11 can simultaneously provide 24V/48V DC power output for use by photovoltaic power supply equipment outside the device.

The communication CPU module 4 comprises the first ARM core CPU industrial processor 12 and an interface module 15, wherein the interface module 15 comprising an electrical port, an optical fiber interface, an Ethernet interface, an RS485 serial port and a GPS interface is connected to the first ARM Core CPU industrial processor 12, the first ARM core CPU industrial processor 12 processes the received signal and communicates with the photovoltaic power supply system, in one embodiment, the first ARM core CPU industrial processor 12 communicates with the photovoltaic power supply system system and other smart devices. In one embodiment, the communication CPU module 4 is equipped with an embedded Ethernet switching module, which can be configured with several optical ports, electrical ports and photoelectric conversion modules, and can support up to 4 electrical ports and 4 optical ports.

The grid connection of photovoltaic power plants needs to be applied to inverters, and the control technology of inverters is also closely related to the quality of photovoltaic power generation units connected to the grid. At present, in order to maximize the use of inverter capacity and maximum power generation, manufacturers will set the power factor of grid-connected inverters at 0.99. However, with the increase of the installed capacity of photovoltaic power plants, due to the power fluctuation of photovoltaic power generation, the high power factor operation of the inverter poses a threat to the stability of the grid. When the active power remains unchanged, the reactive power can hardly be adjusted, and additional reactive power is required. to maintain the voltage. In addition, when the inverter outputs a light load, the harmonics will increase significantly. When the output is below 10% of the rated output, the total harmonic distortion rate of the current will even reach more than 20%. The power of photovoltaic power generation will affect the load characteristics of the power grid with the change of sunshine intensity. Its access will change the power flow direction of the power grid, which will have an impact on the planning and dispatching operation mode of the existing power grid. Moreover, photovoltaic power generation units do not have dispatch automation functions, which increases the difficulty of power grid control and dispatch operation. If a large number of photovoltaic power generation systems are connected to the grid terminal, the voltage fluctuation will be aggravated, which may cause frequent actions of voltage/var adjustment devices; and if a high proportion of photovoltaic power generation systems are introduced, the distribution network will change from the traditional single power source radial network to into a double-terminal or even multi-terminal network, thereby changing the size and duration of the fault current, affecting the protection of the system. The power quality analysis module 8 of the present utility model can solve the above problems, and the power quality analysis module 8 includes a second ARM core CPU industrial processor 18, a dual-port memory 19, a DSP core CPU industrial processor 20, wherein the DSP The core CPU industrial processor 20 monitors and calculates power quality data, and exchanges data with the second ARM core CPU industrial processor 18 through the dual-port memory 19, and the second ARM core CPU industrial processor 18 performs data storage and harmonic analysis. The power quality monitoring and analysis function has a large amount of calculation. Therefore, the DSP+ARM dual-core industrial processor used in the power quality analysis module 8 is a floating-point digital signal processor with low power consumption, which can fully meet the needs of online power quality monitoring and analysis applications. High energy efficiency and connectivity design require highly integrated peripherals and lower heat dissipation. Among them, the DSP core CPU industrial processor 20 can communicate with the monitoring host computer and the dispatching master station of the photovoltaic power supply, and is responsible for sending remote signals, telemetry, electricity, power quality data, etc., and can also receive the remote control opening and closing of the master station. , remote adjustment and other commands, the DSP core CPU industrial processor 20 communicates with the smart devices inside the photovoltaic power generation unit, such as inverters, smart combiner boxes, electric energy meters, environmental monitors and other devices, which can be forwarded to the inverter Remote adjustment, start-stop and other commands of smart devices, the communication protocol can be extended and customized. The dual-port memory 19 used for data exchange between the data of two nuclear industrial processors adopts the IDT7132 dual-port RAM produced by TI in the United States, which has a storage capacity of 2KX8BIT, which can fully meet the needs of the DSP core CPU industrial processor 20 and the second ARM core CPU industrial processor. Data exchange requirements between processors 18. The second ARM core CPU industrial processor 18 is mainly responsible for storage management and analysis of historical data. In one embodiment, the interface module 15 further includes a video surveillance module 21 and a WIFI extension module 22 . The power quality analysis module 8 can support the measurement and analysis of electric energy such as harmonics, interharmonics, and high-order harmonics. Torque ripple occurs on the mechanical load. In one embodiment, the power quality analysis module 8 is configured with a wireless communication module 24 and a protection function module 25 to support wireless communication modes such as GPRS/CDMA/3G/4G. In places where it is inconvenient to deploy optical fibers, the wireless public network can be used for communication, and the protection function module 25 provides protection functions such as shock resistance for the power quality analysis module 8 .

Both AC modules 5 are provided with current converters 16 and voltage converters 17 to support multiple voltages, currents and zero-sequence current acquisitions. In one embodiment, one AC module 5 can support at least 6 voltages, 6 current and 2 zero-sequence current acquisitions. The drive-in module 6 is provided with strong current drive-in input contacts for collecting photovoltaic power supply drive-in signals. In one embodiment, the switch-in module 6 is provided with 32 strong current switch-in input contacts to collect signals such as voltage and current of the photovoltaic power supply. The output module 7 integrates 8 channels and can be programmed as a relay outlet for the control of photovoltaic power supply.

According to the first embodiment of the utility model, the box-station measurement and control device supporting the online monitoring of the power quality of the photovoltaic power supply is equipped with the analog quantity acquisition of the high-voltage side and the low-voltage side split transformer of the photovoltaic box-station transformer, electrical quantity protection, non-electrical quantity protection, remote control and communication. At the same time, the device integrates the communication management machine, optical fiber ring network switch, and wireless access functions, and is responsible for accessing and transmitting the data communication of the inverter, intelligent combiner box and other equipment in the power generation unit, as well as the video data transmission of the on-site video surveillance camera , realize the concentration and transmission of communication information of the intelligent equipment belonging to the photovoltaic power generation sub-system, and access the integrated self-system of the booster station through the self-healing ring optical fiber Ethernet, and then realize the remote management and automatic monitoring of the photovoltaic power generation unit by the booster station. The device can conduct online monitoring and analysis of power quality through the collected data. Therefore, the device is not only fully functional, superior in performance, and easy to use, but also fully adaptable to various harsh environments in order to improve the reliability of the device's operation.

Fig. 2 is a schematic diagram of the internal structure of a box-station measurement and control device supporting on-line monitoring of power quality of a photovoltaic power supply according to a second embodiment of the present invention. Referring to FIG. 3 , the backplane bus module 2 is electrically connected to the power supply module 3 , the communication CPU module 4 , the AC module 5 , the input module 6 , the output module 7 and the power quality analysis module 8 .

The power supply module 3 includes an AC power supply 9, a switching unit 10 and a DC power supply 11. When the AC power supply 9 is interrupted, the switching unit 10 switches the DC power supply 11 to maintain uninterrupted power supply. When the AC power supply 9 is restored When supplying power, the switching unit 10 switches back to the AC power supply 9 for power supply. The power supply module 3 provides a working AC power supply 9 and a backup DC power supply 11 for the device, and the AC power supply 9 supports dual AC and DC power supply. The back-up DC power supply 11 is powered by a rechargeable storage battery.

The communication CPU module 4 comprises the first ARM core CPU industrial processor 12 and an interface module 15, wherein the interface module 15 comprising an electrical port, an optical fiber interface, an Ethernet interface, an RS485 serial port and a GPS interface is connected to the first ARM Core CPU industrial processor 12, the first ARM core CPU industrial processor 12 processes the received signal and communicates with the photovoltaic power supply system, in one embodiment, the first ARM core CPU industrial processor 12 communicates with the photovoltaic power supply system system and other smart devices.

Power quality analysis module 8 comprises the second ARM core CPU industrial processor 18, dual-port memory 19, DSP core CPU industrial processor 20, wherein, said DSP core CPU industrial processor 20 monitors and calculates power quality data, and passes The data of the dual-port memory 19 is exchanged with the second ARM core CPU industrial processor 18, and the second ARM core CPU industrial processor 18 performs data storage and harmonic analysis. The power quality monitoring and analysis function has a large amount of calculation. Therefore, the DSP+ARM dual-core industrial processor used in the power quality analysis module 8 is a floating-point digital signal processor with low power consumption, which can fully meet the needs of online power quality monitoring and analysis applications. High energy efficiency and connectivity design require highly integrated peripherals and lower heat dissipation. Among them, the DSP core CPU industrial processor 20 can communicate with the monitoring host computer and the dispatching master station of the photovoltaic power supply, and is responsible for sending remote signals, telemetry, electricity, power quality data, etc., and can also receive the remote control opening and closing of the master station. , remote adjustment and other commands, the DSP core CPU industrial processor 20 communicates with the smart devices inside the photovoltaic power generation unit, such as inverters, smart combiner boxes, electric energy meters, environmental monitors and other devices, which can be forwarded to the inverter Remote adjustment, start-stop and other commands of smart devices, the communication protocol can be extended and customized. The dual-port memory 19 used for data exchange between the data of two nuclear industrial processors adopts the IDT7132 dual-port RAM produced by TI in the United States, which has a storage capacity of 2KX8BIT, which can fully meet the needs of the DSP core CPU industrial processor 20 and the second ARM core CPU industrial processor. Data exchange requirements between processors 18. The second ARM core CPU industrial processor 18 is mainly responsible for storage management and analysis of historical data. In one embodiment, the interface module 15 further includes a video surveillance module 21 and a WIFI extension module 22 . The power quality analysis module 8 can support the measurement and analysis of electric energy such as harmonics, interharmonics, and high-order harmonics. Torque ripple occurs on the mechanical load. In one embodiment, the power quality analysis module 8 is configured with a wireless communication module 24 and a protection function module 25 to support wireless communication modes such as GPRS/CDMA/3G/4G. In places where it is inconvenient to deploy optical fibers, the wireless public network can be used for communication, and the protection function module 25 provides protection functions such as shock resistance for the power quality analysis module 8 .

Further, the power quality analysis module 8 is equipped with a communication management and photoelectric conversion module 26 for the concentration and transmission of communication information, so as to realize the concentration and transmission of communication information of photovoltaic power sources, and also reduce the secondary wiring, which is convenient for future maintain.

Both AC modules 5 are provided with current converters 16 and voltage converters 17 to support multiple voltages, currents and zero-sequence current acquisitions. In one embodiment, one AC module 5 can support at least 6 voltages, 6 current and 2 zero-sequence current acquisitions. The drive-in module 6 is provided with strong current drive-in input contacts for collecting photovoltaic power supply drive-in signals. In one embodiment, the switch-in module 6 is provided with 32 strong current switch-in input contacts to collect signals such as voltage and current of the photovoltaic power supply. The output module 7 integrates 8 channels and can be programmed as a relay outlet for the control of photovoltaic power supply.

In the second embodiment of the utility model, the box-station measurement and control device supporting on-line monitoring of the power quality of the photovoltaic power supply is not only fully functional, superior in performance, and easy to use, but also realizes the concentration and transmission of information in the design in order to improve the reliability of the device operation. At the same time, the secondary wiring is reduced, which is convenient for future maintenance.

Fig. 3 is a schematic diagram of the internal structure of a box-station measurement and control device supporting on-line monitoring of power quality of photovoltaic power sources according to a third embodiment of the present invention. Referring to Figure 3, the box transformer measurement and control device that supports online monitoring of the power quality of the photovoltaic power supply is an all-metal industrial control chassis with a backplane structure.

The backplane bus module 2 is electrically connected to the power supply module 3 , the communication CPU module 4 , the AC module 5 , the input module 6 , the output module 7 and the power quality analysis module 8 .

The power supply module 3 includes an AC power supply 9, a switching unit 10 and a DC power supply 11. When the AC power supply 9 is interrupted, the switching unit 10 switches the DC power supply 11 to maintain uninterrupted power supply. When the AC power supply 9 is restored When supplying power, the switching unit 10 switches back to the AC power supply 9 for power supply. The power supply module 3 provides a working AC power supply 9 and a backup DC power supply 11 for the device, and the AC power supply 9 supports dual AC and DC power supply. The back-up DC power supply 11 is powered by a rechargeable storage battery.

The communication CPU module 4 comprises the first ARM core CPU industrial processor 12 and an interface module 15, wherein the interface module 15 comprising an electrical port, an optical fiber interface, an Ethernet interface, an RS485 serial port and a GPS interface is connected to the first ARM Core CPU industrial processor 12, the first ARM core CPU industrial processor 12 processes the received signal and communicates with the photovoltaic power supply system, in one embodiment, the first ARM core CPU industrial processor 12 communicates with the photovoltaic power supply system system and other smart devices.

Power quality analysis module 8 comprises the second ARM core CPU industrial processor 18, dual-port memory 19, DSP core CPU industrial processor 20, wherein, said DSP core CPU industrial processor 20 monitors and calculates power quality data, and passes The data of the dual-port memory 19 is exchanged with the second ARM core CPU industrial processor 18, and the second ARM core CPU industrial processor 18 performs data storage and harmonic analysis. The power quality monitoring and analysis function has a large amount of calculation. Therefore, the DSP+ARM dual-core industrial processor used in the power quality analysis module 8 is a floating-point digital signal processor with low power consumption, which can fully meet the needs of online power quality monitoring and analysis applications. High energy efficiency and connectivity design require highly integrated peripherals and lower heat dissipation. The power quality analysis module 8 can support the measurement and analysis of electric energy such as harmonics, interharmonics, and high-order harmonics. Torque ripple occurs on the mechanical load. In one embodiment, the power quality analysis module 8 is configured with a wireless communication module 24 and a protection function module 25 to support wireless communication modes such as GPRS/CDMA/3G/4G. In places where it is inconvenient to deploy optical fibers, the wireless public network can be used for communication, and the protection function module 25 provides protection functions such as shock resistance for the power quality analysis module 8 . The power quality analysis module 8 is configured with a ferroelectric memory 27 connected to the first ARM core CPU industrial processor 18 for recording information, a clock circuit 28 and an external watchdog circuit 29 that ensures reliable operation of the program, preventing the program from run away.

In the third embodiment of the utility model, the box-station measurement and control device for photovoltaic power supply is not only fully functional, superior in performance, and easy to use, but also ensures reliable operation of the program and storage of information and data in the design in order to improve the reliability of the device.

Although the embodiments of the present utility model have been described above in conjunction with the accompanying drawings, the present utility model is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative, instructive, and not limiting sexual. Under the enlightenment of this specification and without departing from the protection scope of the claims of the present invention, those skilled in the art can make various forms, which all belong to the protection of the present invention.

Claims (10)

1. support that the case of the quality of power supply on-line monitoring of photo-voltaic power supply becomes measure and control device for one kind, it comprise cabinet (1) with the backboard bus module (2) be located in described cabinet (1), power module (3), communication cpu module (4), power quality analysis module (8), exchange module (5), open into module (6) and output module (7), wherein

Described backboard bus module (2) electric connection of power supply module (3), communication cpu module (4), power quality analysis module (8), exchange module (5), open into module (6) and output module (7);

Described power module (3) comprises AC power (9), switch unit (10) and DC power supply (11), when AC power (9) is interrupted, described switch unit (10) switches described DC power supply (11) to keep uninterrupted power supply, when described AC power (9) restores electricity, AC power (9) power supply described in described switch unit (10) switchback;

Described communication cpu module (4) comprises ARM core CPU industrial handlers (12) and interface module (15), wherein, comprise electric mouth, optical fiber interface, Ethernet interface, RS485 serial ports and the described interface module (15) of GPS interface and be connected described ARM core CPU industrial handlers (12), described ARM core CPU industrial handlers (12) is by the signal transacting of reception and communicate with photovoltaic power supply system;

Described power quality analysis module (8) comprises the 2nd ARM core CPU industrial handlers (18), dual-ported memory (19), DSP core CPU industrial handlers (20), wherein, described DSP core CPU industrial handlers (20) monitoring and calculating power quality data, and by described dual-ported memory (19) data interaction to described 2nd ARM core CPU industrial handlers (18), described 2nd ARM core CPU industrial handlers (18) carries out data storage and carries out harmonic analysis;

Two exchange module (5) and are equipped with power pack (16) and voltage changer (17) and make eachly to exchange the collection that module (5) at least supports 6 voltages, 6 electric currents and 2 zero-sequence currents;

Described opening is provided with forceful electric power into module (6) and opens and open into signal into input contact for gathering photo-voltaic power supply;

The control of relay outlet for photo-voltaic power supply can be weaved in described integrated 8 tunnels of module (7) of outputing.

2. the case change measure and control device supporting the quality of power supply on-line monitoring of photo-voltaic power supply as claimed in claim 1, is characterized in that: described interface module (15) comprises video monitoring module (21) and WIFI expansion module (22) further.

3. as claimed in claim 1 support that the case of the quality of power supply on-line monitoring of photo-voltaic power supply becomes measure and control device, it is characterized in that: described DC power supply (11) is for chargeable storage and be configured with cell activation module (23).

4. the case change measure and control device supporting the quality of power supply on-line monitoring of photo-voltaic power supply as claimed in claim 1, is characterized in that: the all-metal industry control cabinet that described cabinet (1) is back plate type structure.

5. the case change measure and control device supporting the quality of power supply on-line monitoring of photo-voltaic power supply as claimed in claim 1, is characterized in that: described DSP core CPU industrial handlers (20) is connected with temperature control module (13) by isolation communicating circuit.

6. the case change measure and control device supporting the quality of power supply on-line monitoring of photo-voltaic power supply as claimed in claim 5, it is characterized in that: described DSP core CPU industrial handlers (20) is also provided with alarm module (14), described alarm module (14) is connected with described temperature control module (13), produces alarm signal when temperature of cable junction exceedes the preset temperature of temperature control module (13).

7. the case change measure and control device supporting the quality of power supply on-line monitoring of photo-voltaic power supply as claimed in claim 1, is characterized in that: described power quality analysis module (8) is configured with wireless communication module (24) and defencive function module (25).

8. the case change measure and control device supporting the quality of power supply on-line monitoring of photo-voltaic power supply as claimed in claim 1, is characterized in that: described power quality analysis module (8) is configured with telecommunication management and photoelectric conversion module (26) concentrating and transmitting for the communication information.

9. as claimed in claim 1 support that the case of the quality of power supply on-line monitoring of photo-voltaic power supply becomes measure and control device, it is characterized in that: described power quality analysis module (8) is configured with the ferroelectric memory for recorded information (27), the clock circuit (28) that are connected with described 2nd ARM core CPU industrial handlers (18) and guarantees the outer watchdog circuit (29) of program reliable operation.

10. as claimed in claim 1 support that the case of the quality of power supply on-line monitoring of photo-voltaic power supply becomes measure and control device, it is characterized in that: described in open and adopt photoelectric isolating circuit input to protect to reduce electromagnetic interference and to be formed internal circuit into module (6).