CN217278655U - Real-time monitoring device for power quality - Google Patents
Real-time monitoring device for power quality Download PDFInfo
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- CN217278655U CN217278655U CN202121343784.XU CN202121343784U CN217278655U CN 217278655 U CN217278655 U CN 217278655U CN 202121343784 U CN202121343784 U CN 202121343784U CN 217278655 U CN217278655 U CN 217278655U
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Abstract
The utility model provides an electric energy quality real-time supervision device belongs to electric power system technical field. Including on-the-spot measuring module, main control server module, liquid crystal display module and main control power module, on-the-spot measuring module liquid crystal display module with main control power module all is connected to the main control server module, the electrical signal of measuring point includes the three-phase voltage and the three-phase current of measuring point, on-the-spot measuring module includes 3 voltage transformer, 3 current transformer, surge protection and filter circuit, 2 16 precision successive comparison type ADC chips, 1 programmable logic device FPGA chip, ADC power module and WIFI module, the main control server module includes SOC treater, LCD display module, ethernet communication module, DDR3 memory module, record ripples module and GPS module.
Description
Technical Field
The utility model relates to an electric power system technical field especially relates to an electric energy quality real-time supervision device.
Background
The analog sampling system is an information source for the work of the power quality monitoring system, and when the problems of voltage fluctuation, flicker, three-phase imbalance, temporary rising, temporary falling, harmonic wave and the like occur at a measuring point, the system needs to analyze and judge the power quality according to an analog sampling value, so that a basis is provided for the lower-level power quality control. Therefore, the sampling real-time performance and the remote communication reliability of the analog sampling system are key links of the monitoring device, and when the analog sampling system is abnormal or in an unreliable working state, the effectiveness and the accuracy of the sampling value are seriously influenced, so that the electric energy quality monitoring device is incorrectly judged.
The field device of the existing analog sampling system does not have the capability of data real-time processing and analysis, and the real-time performance and the stability of the system are difficult to guarantee: due to poor real-time performance, the system does not have the capability of tracking and capturing transient disturbance and transient harmonic; the remote communication capability is limited, so that remote monitoring, data sharing and long-term evaluation and prediction are not easy to realize; the fault identification capability is limited, and the fault recording and manual recording functions are not provided; the measurement point sampling module directly transmits the sampled data through network communication without any processing, and communication congestion and data loss are easily caused.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an electric energy quality real-time supervision device can carry out effectual supervision and judgement to the measuring point electric wire netting signal, and reducible data traffic and communication delay phenomenon avoid the condition that communication blocks up and data are lost, solve the not enough problem of real-time and stability.
The embodiment of the utility model provides a solve the technical scheme that its technical problem adopted and be:
the utility model provides an electric energy quality real-time supervision device, includes local measurement module, main control server module, liquid crystal display module and main control power module, local measurement module the liquid crystal display module with main control power module all is connected to the main control server module, wherein:
the local measurement module is arranged at a measurement point and used for acquiring an electrical signal of the measurement point, performing resampling operation based on the electrical signal to obtain measurement point sampling data and sending the measurement point sampling data to the main control server module; the local measurement module is also used for measuring the power quality factor of the module in place and sending a power quality state signal to the main control server module, wherein the power quality state signal carries the power quality factor;
the main control server module is used for controlling the local measurement modules to synchronously execute sampling operation; performing power quality analysis calculation according to the measurement point sampling data to obtain a power quality calculation result, storing the measurement point sampling data, displaying the measurement point sampling data, and communicating with the on-site measurement module; the power quality factor is used for judging the reliability of the sampling data of the measuring points; the device is also used for executing the wave recording and the access operation of the wave recording data;
the liquid crystal display module is used for displaying the waveform of the sampling data of the measuring point in real time and displaying the electric energy quality calculation result;
and the master control power supply module is used for supplying power to the electric energy quality real-time monitoring device.
Preferably, the electrical signal of the measuring point comprises the three-phase voltage and the three-phase current of the measuring point, the in-situ measuring module comprises 3 voltage transformers, 3 current transformers, a surge protection and filter circuit, 2 pieces of 16-bit precision successive comparison type ADC chips, 1 piece of FPGA chip, an ADC power module and a WIFI module, the 3 voltage transformers and the 3 current transformers are all connected to the signal input end of the surge protection and filter circuit, the signal output end of the surge protection and filter circuit is connected to the signal input end of a first ADC chip and the signal input end of a second ADC chip, the signal output end of the first ADC chip and the signal output end of the second ADC chip are both connected to the FPGA chip, and the ADC power module is connected with the first ADC chip and the second ADC chip, the WIFI modules are connected to the FPGA chip, and the FPGA chip is connected with the main control server module through optical fiber communication;
the 3 voltage transformers are used for collecting the three-phase voltage and sending the three-phase voltage to the first ADC chip and the second ADC chip after passing through the surge protection and filter circuit;
the 3 current transformers are used for collecting the three-phase current and sending the three-phase current to the first ADC chip and the second ADC chip after passing through the surge protection and filter circuit;
the surge protection and filter circuit is used for preventing surge current caused by lightning from damaging the on-site measurement module; the three-phase voltage and the three-phase current are filtered;
the ADC power supply module comprises a first power supply and reference voltage unit and a second power supply and reference voltage unit;
the first power supply and reference voltage unit is connected with the first ADC chip and used for providing power supply voltage and reference voltage for the first ADC chip; the second ADC chip is connected with the first ADC chip and used for collecting the power supply voltage of the first ADC chip and the reference voltage of the first ADC chip;
the second power supply and reference voltage unit is connected with the second ADC chip and used for providing power supply voltage and reference voltage for the second ADC chip; the first ADC chip is connected with the first ADC chip and used for collecting the power supply voltage of the second ADC chip and the reference voltage of the second ADC chip;
the first ADC chip is configured to perform analog-to-digital conversion processing on the three-phase current and the three-phase voltage after filtering processing to obtain first ADC sampling data, where the first ADC sampling data includes digital signals of the three-phase current and digital signals of the three-phase voltage; the second ADC chip is used for collecting and monitoring a power supply voltage of the second ADC chip and a reference voltage of the second ADC chip;
the second ADC chip is configured to perform analog-to-digital conversion processing on the three-phase current and the three-phase voltage after filtering processing to obtain second ADC sampling data, where the second ADC sampling data includes digital signals of the three-phase current and digital signals of the three-phase voltage; the first ADC chip is used for collecting and monitoring a power supply voltage of the first ADC chip and a reference voltage of the first ADC chip;
the FPGA chip is used for receiving the first ADC sampling data and the second ADC sampling data, and resampling based on the first ADC sampling data and the second ADC sampling data to obtain the measurement point sampling data; the power supply quality factor analysis module is also used for reading the power supply voltage of the first ADC chip, the reference voltage of the first ADC chip, the power supply voltage of the second ADC chip and the reference voltage of the second ADC chip through a parallel port and analyzing the power supply quality factor; generating the power quality state signal and sending the power quality state signal to the main control server module;
the WIFI module is connected with the FPGA chip and used for realizing the wireless communication function of the FPGA chip and transmitting data in real time; and is also used for receiving a correction signal for the internal parameters of the in-situ measurement module.
Preferably, the main control server module comprises an SOC processor, an LCD display module, an Ethernet communication module, a DDR3 memory module, a wave recording module and a GPS module,
the SOC processor is used for controlling the LCD display module, the Ethernet communication module, the DDR3 memory module, the wave recording module and the GPS module;
the SOC processor is used for issuing a synchronous sampling instruction and a GPS time setting instruction to each local measurement module through the GPS module so as to control each local measurement module to synchronously execute sampling operation; for reading the measurement point sample data; the power quality calculation result is analyzed and calculated according to the sampling data of the measuring points, and comprises one or more of active power, reactive power, harmonic waves, flicker data and voltage drop data; the power quality state signal is used for receiving the power quality state signal, reading the power quality factor and judging the reliability of the current sampling data of the measuring point;
the LCD display module is connected to the liquid crystal display module and used for outputting the waveform of the sampling data of the measuring point and the electric energy quality calculation result, and the waveform of the sampling data of the measuring point comprises a voltage waveform and a current waveform;
the wave recording module is used for triggering automatic fault wave recording operation when the electric energy quality calculation result is abnormal; the system is also used for executing real-time manual wave recording operation;
the GPS module is used for providing a GPS time setting function for the main control server module;
preferably, the power quality factors in the power quality status signal include 1 and 0, a power quality factor of 1 indicates that the power quality is good, and a power quality factor of 0 indicates that the power quality is bad.
According to the above technical scheme, the embodiment of the utility model provides a power quality real-time supervision device possesses data real-time processing and analytical ability, improves the tracking and the capture ability to instantaneous disturbance and transient state harmonic, realizes data sharing and aassessment and prediction for a long time, can carry out effectual supervision and judgement to the measuring point electric wire netting signal, reducible data traffic and communication delay phenomenon avoid the communication to block up and the condition that data lost, can improve the real-time and the stability of monitoring work.
Drawings
Fig. 1 is the composition structure diagram of the real-time monitoring device for electric energy quality.
Fig. 2 is a structural diagram of the components of the on-site measuring module in the real-time monitoring device for power quality.
Fig. 3 is a circuit diagram of surge protection and filtering in the in-situ measurement module.
Fig. 4 is a schematic diagram of the real-time power quality monitoring device controlling a plurality of local measurement modules to synchronously perform a sampling operation and a GPS time synchronization operation.
Detailed Description
The following combines the drawings of the utility model to further elaborate the technical scheme and technical effect of the utility model.
As shown in fig. 1 the utility model provides an electric energy quality real-time supervision device, including n on the spot measuring module 1, main control server module 2, liquid crystal display module 3 and main control power module 4, on the spot measuring module 1, liquid crystal display module 3 and main control power module 4 all are connected to main control server module 2, are controlled by main control server module 2, wherein:
the local measurement module 1 is arranged at a measurement point and used for acquiring an electrical signal of the measurement point, performing resampling operation based on the electrical signal to obtain measurement point sampling data and sending the measurement point sampling data to the main control server module 2; the power quality state signal is used for carrying the power quality factor; meanwhile, a wifi interface is further provided, so that maintenance personnel can read original data and correct sampling parameters conveniently. And data are transmitted between the local measurement module 1 and the master control server module 2 through optical fiber communication.
The main control server module 2 is used for controlling the local measurement modules 1 to synchronously execute sampling operation; performing power quality analysis calculation according to the sampling data of the measuring points to obtain a power quality calculation result, storing the sampling data of the measuring points, displaying the sampling data of the measuring points and communicating with the local measuring module 1; the device is also used for judging the reliability of the sampling data of the measuring point according to the quality factor of the power supply; the device is also used for executing wave recording and accessing operation of wave recording data;
the liquid crystal display module 3 is used for displaying the waveform of the sampling data of the measuring point in real time and displaying the calculation result of the electric energy quality, namely dynamically displaying the voltage and current waveform, the active power, the reactive power, the harmonic wave, the flicker data, the voltage drop data and the like in real time through an LCD;
and the main control power supply module 4 is used for supplying power to the electric energy quality real-time monitoring device.
The electric signal of the measuring point that on-site measuring module 1 needs to gather includes the three-phase voltage and the three-phase current of measuring point, it is specific, as shown in fig. 2, on-site measuring module 1 includes 3 voltage transformer (miniature PT of high accuracy), 3 current transformer (miniature CT of high accuracy), surge protection and filter circuit, 2 16 precision successive comparison type ADC chips of piece, 1 programmable logic device FPGA chip, ADC power module and WIFI module, wherein, mutually independent and adopt independent power supply and sampling reference voltage between 2 ADC, and send power supply and sampling reference voltage to the monitoring of side ADC sampling.
3 voltage transformer and 3 current transformer all are connected to surge protection and filter circuit's signal input part, surge protection and filter circuit's signal output part is connected to the signal input part of first ADC chip and the signal input part of second ADC chip, the signal output part of first ADC chip and the signal output part of second ADC chip all are connected to the FPGA chip, ADC power module and first ADC chip, and the second ADC chip is connected, the WIFI module all is connected to the FPGA chip, the FPGA chip passes through fiber communication and establishes with the main control server module and is connected.
The in-situ measuring module 1 has the following features: (1) the method comprises the following steps that a double-sampling ADC (analog to digital converter) framework is adopted, a local measurement module performs digital filtering on original sampling data and then performs secondary reconstruction on the data, namely a resampling process, and the data are provided for a main control server module to output synchronous data through a resampling algorithm according to synchronous pulses of a device; (2) the ADC high-speed sampling data is subjected to preliminary processing such as digital filtering and resampling process through the FPGA programmable logic processor and then is transmitted to the main control processor through the optical fiber at high speed; (3) meanwhile, the WIFI function is achieved, and on-site operation and maintenance personnel can conveniently acquire current sampling information and maintain the sampling information; (4) the on-site measurement module double-sampling ADC framework performs mutual sampling on an ADC power supply and reference voltage thereof, performs quality analysis, and transmits a power supply quality state signal to the master control server; (5) the electric energy quality measuring points can be configured in a modularized mode, and the expansion is flexible.
3 voltage transformers for collecting three-phase voltage u a 、u b 、u c And the three-phase voltage is transmitted to the first ADC chip and the second ADC chip after passing through the surge protection and filter circuit, and the three-phase voltage u a 、u b 、u c Is an analog signal;
3 current transformers for collecting three-phase current i a 、i b 、i c And three-phase current i is transmitted to the first ADC chip and the second ADC chip after passing through the surge protection and filter circuit a 、i b 、i c Is an analog signal;
the surge protection and filter circuit is used for preventing surge current caused by lightning from damaging the local measurement module; the filter is also used for filtering the three-phase voltage and the three-phase current; as the ADC front end sampling analog signal processing circuit that fig. 3 shows, constitute 2 RC filter circuit by resistance-capacitance and to sampling signal of telecommunication filtering, two RC filter circuit's front end is parallelly connected through the TVS pipe, prevents that the thunderbolt surge from damaging local measurement module 1, and when the instantaneous high pressure of thunderbolt interference coupling, the TVS pipe instantaneously switches on, prevents that the excessive pressure from damaging back level sampling circuit. The measurement channels of the in-situ measurement module 1 are isolated from each other to avoid mutual interference.
The ADC power supply module comprises a first power supply and reference voltage unit and a second power supply and reference voltage unit;
the first power supply and reference voltage unit is connected with the first ADC chip and used for providing power supply voltage and reference voltage for the first ADC chip; the second ADC chip is connected with the first ADC chip and used for collecting the power supply voltage of the first ADC chip and the reference voltage of the first ADC chip;
the second power supply and reference voltage unit is connected with the second ADC chip and used for providing power supply voltage and reference voltage for the second ADC chip; the first ADC chip is connected with the first ADC chip and used for collecting the power supply voltage of the second ADC chip and the reference voltage of the second ADC chip;
the first ADC chip is used for carrying out analog-to-digital conversion processing on the three-phase current and the three-phase voltage after the filtering processing to obtain first ADC sampling data, and the first ADC sampling data comprises digital signals of the three-phase current and digital signals of the three-phase voltage; the power supply voltage of the second ADC chip and the reference voltage of the second ADC chip are collected and monitored;
the second ADC chip is used for carrying out analog-to-digital conversion processing on the three-phase current and the three-phase voltage after the filtering processing to obtain second ADC sampling data, and the second ADC sampling data comprises digital signals of the three-phase current and digital signals of the three-phase voltage; the power supply voltage of the first ADC chip and the reference voltage of the first ADC chip are collected and monitored;
the FPGA chip is used for receiving the first ADC sampling data and the second ADC sampling data, and performing resampling and framing on the basis of the first ADC sampling data and the second ADC sampling data to obtain measuring point sampling data; the power supply quality factor analyzing device is also used for reading the power supply voltage of the first ADC chip, the reference voltage of the first ADC chip, the power supply voltage of the second ADC chip and the reference voltage of the second ADC chip through the parallel port, and comparing the power supply voltage with a threshold value set by software to analyze the power supply quality factor; and generating a power quality state signal containing the power quality factor, sending the power quality factor to the main control server module, wherein the power quality factor comprises 1 and 0, the 1 represents that the power quality is good, and the 0 represents that the power quality is bad, and the power quality state signal is forwarded to the main control server module 2 to be used for judging the reliability of the current analog quantity sampling value and arranging the maintenance plan of the measurement module.
The WIFI module is connected with the FPGA chip and used for realizing the wireless communication function of the FPGA chip and transmitting data in real time; and is also used for receiving correction signals for the internal parameters of the in-situ measurement module. The WIFI module adopts a Hitachi HLK-RM58S embedded UART-WIFI (serial port-wireless network) module, and the FPGA controls the RM58S module and other WIFI equipment to perform data transmission through the serial port. When the wireless terminal is configured to work in an AP mode, a mobile phone, a PC or other WIFI equipment can be connected to the RM58S module through WIFI.
The main control server module 2 comprises an SOC processor, an LCD display module, an Ethernet communication module, a DDR3 memory module, a wave recording module and a GPS module, wherein:
the SOC processor is used for controlling the LCD display module, the Ethernet communication module, the DDR3 memory module, the wave recording module and the GPS module;
the SOC processor is used for issuing a synchronous sampling instruction and a GPS time-setting instruction to each local measurement module through the GPS module so as to control each local measurement module to synchronously execute sampling operation; the device is used for reading sampling data of the measuring points; the device is used for analyzing and calculating the electric energy quality calculation result according to the sampling data of the measuring point, wherein the electric energy quality calculation result comprises one or more of active power, reactive power, harmonic wave, flicker data and voltage sag data; the power quality factor in the power quality state signal comprises 1 and 0, the power quality factor is 1 to represent that the power quality is good, and the power quality factor is 0 to represent that the power quality is bad.
The LCD display module is connected to the liquid crystal display module and used for outputting the waveform of the sampling data of the measuring point and the calculation result of the electric energy quality, and the waveform of the sampling data of the measuring point comprises a voltage waveform and a current waveform;
the wave recording module is used for triggering automatic fault wave recording operation when the electric energy quality calculation result is abnormal; the system is also used for executing real-time manual wave recording operation; the main control server is provided with a large-capacity SATA (Serial advanced technology attachment) surface-mounted hard disk, can automatically trigger wave recording when the power quality is abnormal, stores the current sampling data of a measuring point to the local, is convenient for maintenance personnel to analyze and check, and can transmit an alarm signal to a background through an Ethernet interface to remind operation and maintenance personnel. Meanwhile, manual wave recording is supported, original sampling data of any monitoring time are retrieved and a power quality analysis report is generated, so that maintenance is facilitated, the storage depth of the wave recording data is adjustable, and at least the original data of voltage and current and the power quality analysis data of 60s before and after the wave recording point can be checked. The recording automatically generates a corresponding operation log.
The GPS module is used for providing a GPS time synchronization function for the main control server module; as shown in fig. 4, the main control server starts ADC sampling of each measurement module simultaneously through the synchronous sampling signal CNVT, and the GPS signal provides time scales for each local measurement module 1 to make the time of each measurement module consistent, so that the analysis and processing of the main control server module 1 are facilitated.
As shown in fig. 1, the SOC processor in the main control server module 2 is ZYNQ-7030, which is a Xilinx programmable SOC including a dual-core ARM Cortex-a9 processor and Spartan-7 series programmable logic devices, and the processor frequency may reach 800MHz, and uses a 1GByte DDR3 memory. The two ARM cores respectively perform functions, and the ARM core 1 mainly completes all tasks related to communication (including transmission of internet access, RS485, serial ports and display data) on the plate, and works of wave recording, record access and the like. The ARM core 2 mainly completes the reading and analysis of the sampling data of each measuring module and calculates various key parameters of the power quality, the reading of the power quality factor of the measuring module, the synchronous sampling outlet control of the measuring module and the like. The programmable logic of the SOC realizes an optical communication function and is used for reading sampling data of the measurement module. The SOC has the advantages that all the processor cores are communicated at high speed through the on-chip AXI bus, and the speed reaches 2 Gb/s.
The DDR3 memory module provides cache for ZYNQ-7030 high-speed operation, and the Ethernet module is used for connecting a background and providing an alarm transmission channel when the power quality is abnormal.
The embodiment of the utility model provides an electric energy quality real-time supervision device's hardware is with low costs, and measurement module can lay in a flexible way on the spot, and measurement module on the spot of every measuring point configuration can realize carrying out effectual supervision and judgement to measuring point electric wire netting signal, and measurement module on the spot samples on the spot and converts the sampling information into light signal remote transmission to the main control server module at the line measuring point, avoids the complicated electromagnetic environment of transformer substation to cause the interference to signal of telecommunication transmission. The local measurement modules are independent from each other, so that the power quality measurement points can be flexibly configured; the measurement channels of the local measurement modules are isolated from each other; the main control server module provides the functions of calculating, analyzing, displaying, communicating and the like for the sampling data of the measuring points; when synchronous sampling control and GPS time synchronization are carried out on each in-situ measurement module, the function can ensure that the time scales of each sampling point are the same and the data is reliable when a plurality of measurement points need to be analyzed synchronously.
The local measurement module is configured with a WIFI communication function, operation and maintenance personnel can conveniently and flexibly read the original data of a measurement point to perform real-time analysis, parameters such as sampling rate, filtering cut-off frequency and the like can be corrected on line through WIFI, and meanwhile, the main control server module is supported to perform remote correction through optical fiber communication.
The main control server module reads the power quality factors sampled by the local sampling modules, judges whether the current sampling data is credible or not, prevents the sampling modules from working abnormally to cause electric energy quality analysis misjudgment, and provides a basis for operation and maintenance personnel to overhaul the sampling modules.
The embodiment of the utility model provides a power quality real-time supervision device possesses data real-time processing and analysis ability, improves the tracking and the capture ability to instantaneous disturbance and transient state harmonic, realizes data sharing and long-term aassessment and prediction, can carry out effectual supervision and judgement to measurement point electric wire netting signal, reducible data traffic and communication delay phenomenon avoid the condition that communication blocked up and data lost, can improve the real-time and the stability of monitoring work. In addition, still provide trouble record ripples and manual record ripples function, make things convenient for fortune dimension personnel to analyze and maintain.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (4)
1. The utility model provides a power quality real-time supervision device which characterized in that, includes at least one local measurement module, main control server module, liquid crystal display module and main control power module, local measurement module the liquid crystal display module with main control power module all is connected to the main control server module, wherein:
the local measurement module is arranged at a measurement point and used for acquiring an electrical signal of the measurement point, performing resampling operation based on the electrical signal to obtain measurement point sampling data and sending the measurement point sampling data to the main control server module; the main control server module is used for analyzing the power quality factor and sending a power quality state signal to the main control server module, wherein the power quality state signal carries the power quality factor;
the main control server module is used for controlling the local measurement modules to synchronously execute sampling operation; performing power quality analysis calculation according to the measurement point sampling data to obtain a power quality calculation result, storing the measurement point sampling data, displaying the measurement point sampling data, and communicating with the on-site measurement module; the reliability of the sampling data of the measuring points is judged according to the power quality factor; the device is also used for executing wave recording and accessing operation of wave recording data;
the liquid crystal display module is used for displaying the waveform of the sampling data of the measuring point in real time and displaying the electric energy quality calculation result;
and the master control power supply module is used for supplying power to the electric energy quality real-time monitoring device.
2. The device for monitoring the quality of electric energy in real time according to claim 1, wherein the electric signals of the measuring point comprise three-phase voltage and three-phase current of the measuring point, the in-situ measuring module comprises 3 voltage transformers, 3 current transformers, a surge protection and filtering circuit, 2 pieces of 16-bit precision successive comparison type ADC chips, 1 piece of programmable logic device FPGA chip, an ADC power module and a WIFI module, the 3 voltage transformers and the 3 current transformers are connected to the signal input end of the surge protection and filtering circuit, the signal output end of the surge protection and filtering circuit is connected to the signal input end of a first ADC chip and the signal input end of a second ADC chip, the signal output end of the first ADC chip and the signal output end of the second ADC chip are connected to the FPGA chip, and the ADC power module and the first ADC chip, The WIFI module is connected to the FPGA chip, and the FPGA chip is connected with the main control server module through optical fiber communication;
the 3 voltage transformers are used for collecting the three-phase voltage and sending the three-phase voltage to the first ADC chip and the second ADC chip after passing through the surge protection and filter circuit;
the 3 current transformers are used for collecting the three-phase current and sending the three-phase current to the first ADC chip and the second ADC chip after passing through the surge protection and filter circuit;
the surge protection and filter circuit is used for preventing surge current caused by lightning from damaging the on-site measurement module; the three-phase voltage and the three-phase current are filtered;
the ADC power supply module comprises a first power supply and reference voltage unit and a second power supply and reference voltage unit;
the first power supply and reference voltage unit is connected with the first ADC chip and used for providing power supply voltage and reference voltage for the first ADC chip; the second ADC chip is connected with the second ADC chip and used for collecting the power supply voltage of the first ADC chip and the reference voltage of the first ADC chip;
the second power supply and reference voltage unit is connected with the second ADC chip and used for providing power supply voltage and reference voltage for the second ADC chip; the first ADC chip is connected with the second ADC chip and used for collecting the power supply voltage of the second ADC chip and the reference voltage of the second ADC chip;
the first ADC chip is configured to perform analog-to-digital conversion on the three-phase current and the three-phase voltage after filtering processing to obtain first ADC sampling data, where the first ADC sampling data includes digital signals of the three-phase current and digital signals of the three-phase voltage; the second ADC chip is used for collecting and monitoring a power supply voltage of the second ADC chip and a reference voltage of the second ADC chip;
the second ADC chip is configured to perform analog-to-digital conversion processing on the three-phase current and the three-phase voltage after filtering processing to obtain second ADC sampling data, where the second ADC sampling data includes digital signals of the three-phase current and digital signals of the three-phase voltage; the first ADC chip is used for collecting and monitoring a power supply voltage of the first ADC chip and a reference voltage of the first ADC chip;
the FPGA chip is used for receiving the first ADC sampling data and the second ADC sampling data, and resampling based on the first ADC sampling data and the second ADC sampling data to obtain the measurement point sampling data; the power supply quality factor analysis module is also used for reading the power supply voltage of the first ADC chip, the reference voltage of the first ADC chip, the power supply voltage of the second ADC chip and the reference voltage of the second ADC chip through a parallel port and analyzing the power supply quality factor; generating the power quality state signal and sending the power quality state signal to the main control server module;
the WIFI module is connected with the FPGA chip and used for transmitting data in real time through the wireless communication function of the FPGA chip; and is also used for receiving a correction signal for the internal parameters of the in-situ measurement module.
3. The real-time monitoring device of the power quality as claimed in claim 1, wherein the main control server module comprises an SOC processor, an LCD display module, an Ethernet communication module, a DDR3 memory module, a wave recording module and a GPS module,
the SOC processor is used for controlling the LCD display module, the Ethernet communication module, the DDR3 memory module, the wave recording module and the GPS module;
the SOC processor is used for issuing a synchronous sampling instruction and a GPS time setting instruction to each local measurement module through the GPS module so as to control each local measurement module to synchronously execute sampling operation; for reading the measurement point sample data; the electric energy quality calculation result is analyzed and calculated according to the sampling data of the measuring points, and comprises one or more of active power, reactive power, harmonic waves, flicker data and voltage drop data; the power quality state signal is used for receiving the power quality state signal, reading the power quality factor and judging the reliability of the current sampling data of the measuring point;
the LCD display module is connected to the liquid crystal display module and used for outputting the waveform of the sampling data of the measuring point and the electric energy quality calculation result, and the waveform of the sampling data of the measuring point comprises a voltage waveform and a current waveform;
the wave recording module is used for triggering automatic fault wave recording operation when the electric energy quality calculation result is abnormal; the system is also used for executing real-time manual wave recording operation;
and the GPS module is used for providing a GPS time synchronization function for the main control server module.
4. The real-time monitoring device for power quality as claimed in claim 1, wherein the power quality factors in the power quality status signal include 1 and 0, wherein a power quality factor of 1 indicates a good quality of the power, and a power quality factor of 0 indicates a bad quality of the power.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116828436A (en) * | 2023-08-31 | 2023-09-29 | 长春理工大学 | WiFi communication system based on FPGA |
| CN116828436B (en) * | 2023-08-31 | 2023-12-26 | 长春理工大学 | WiFi communication system based on FPGA |
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