CN103969526A - Electric energy quality collecting device and application thereof in electric energy quality comprehensive analysis system - Google Patents
Electric energy quality collecting device and application thereof in electric energy quality comprehensive analysis system Download PDFInfo
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Abstract
The invention relates to an electric energy quality collecting device and the application of the electric energy quality collecting device in an electric energy quality comprehensive analysis system. The electric energy quality collecting device comprises a power module, a signal input module, a time tick module, a data collection and analysis module, a back plate data bus and an Ethernet port. The electric energy quality comprehensive analysis system is a background manager provided with embedded electric energy quality steady state/transient state synthetic analysis software and receives electric energy quality steady state data and transient state data transmitted by the device in real time to analyze the electric energy quality, and the electric energy quality comprehensive analysis system is high in real-time performance, misses no disturbance events, and can rapidly extract signal envelopes, accurately position transient state characteristics such as the starting time, the duration time and the amplitude of disturbance of the transient state electric energy quality and ensure correctness of extracting transient state information. By applying the synthetic analysis combining the steady state and the transient state of the electric energy quality, the defects that an electric energy quality transient state algorithm is poor in real-time performance and large in calculation quantity can be made up, causes of electric energy quality transient state events can be accurately positioned, and safe and stable operation of an electrical power system and electrical equipment can be ensured.
Description
Technical field
The present invention relates to power quality analysis, particularly relate to a kind of quality of power supply harvester and the application in quality of power supply overall analysis system thereof.
Background technology
The power quality problem of existing electric system generally comprises the transient power quality problems such as stationary power quality problem and voltage dip such as harmonic wave, the former can damage system equipment, threaten the safe operation of system, or user's normal power supply is even interrupted in the direct impact of meeting, causes serious economic loss.Improvement to stationary power quality at present, and detection and localization method to transient power quality problem, majority is the data analysis based on afterwards, only lay particular emphasis on initial time and the duration of detecting transient power quality problem, there are many restrictions for Practical, and cannot directly locate the problem of quality of power supply profound level, be difficult to assisting users and carry out electric energy quality synthesis evaluation, and then formulate rational scheme and improve the quality of power supply.
Summary of the invention
A technical matters to be solved by this invention is the defect that makes up above-mentioned prior art, and a kind of quality of power supply harvester is provided.
Another technical matters to be solved by this invention is the defect that makes up above-mentioned prior art, and the application scheme of a kind of quality of power supply harvester in quality of power supply overall analysis system is provided.
Quality of power supply harvester technical matters of the present invention is solved by the following technical programs.
This quality of power supply harvester, be arranged on monitoring field, be connected with voltage/current transducer signal output terminal and the external timing signal output terminal of monitoring field, power quality index comprises frequency, voltage effective value/deviation, current effective value/deviation, voltage/current harmonic wave, voltage/current order component and three-phase imbalance.
The feature of this quality of power supply harvester is:
Comprise the power module that stabilized power source is provided to each component parts, signal input module, external time service device or time service unit to time module, with described to time the module data acquisition and the analysis module that are connected, respectively with described signal input module, described to time the module backboard data bus that is connected with described data acquisition and analysis module, and be connected with described data acquisition and analysis module for the Ethernet interface of quality of power supply overall analysis system communication, described to time module the synchronizing signal of external time service device or time service unit is converted to external timing signal, the unified synchronous clock of target while providing as accurate sampled point to described data acquisition and analysis module and described signal input module, with the high precision of guaranteeing that described data acquisition and analysis module gather, and in real time the quality of power supply steady state data of collection and Temporal Data are sent to quality of power supply overall analysis system by Ethernet interface, realize definite value configuration, quality of power supply file management, show real-time waveform data and electric energy quality real-time monitoring, data derive and print, and power quality analysis, described quality of power supply steady state data is to comprise voltage, the result of calculation of the Steady-state Parameters of current effective value and frequency, described Power Quality Transient Disturbance is the raw data that transient state disturbance starts judgement.
Quality of power supply harvester technical matters of the present invention is solved by following further technical scheme.
Described to time module comprise on-the-spot Programmadle logic gate array (the FieldProgrammable Gate Array for resolving control, initialism is FPGA), to time CPU and constant-temperature crystal oscillator (Oven Controlled Crystal Oscillator, initialism is OCXO), described to time module by FPGA the 1PPS to external time service device or time service unit, target range instrument group (Inter-RangeInstrumentation Group, initialism is IRIG)-B signal resolves, generate high-precision clock signal, in the time that outside satellite-signal disappears, accurately kept time by OCXO, ensure the correctness of time signal, after satellite-signal recovers, automatically switch to again external sync clock to time mode, described external time service device or time service unit are Big Dipper positioning system clocks, GPS (GlobalPositioning System, initialism is GPS) one in clock.
Described data acquisition and analysis module, comprise central processor unit (the Central Processing Unit that is provided with data acquisition and pretreatment module and data analysis module, initialism is CPU), flash memory (Compact Flash, initialism is CF) device and network interface, described data acquisition and pretreatment module are for the real time data of synchronous acquisition plurality of voltages/current channel, receive to time module generate high-precision clock signal, sampled point is beaten to markers, described CF device is CF card, quality of power supply stable state trend file and transient state recorded wave file that described CF card generates for storing the data analysis module of CPU element.
Described data acquisition and pretreatment module, from backboard data bus, read in real time on the one hand plurality of voltages/the current sampling data of target sampled point while having beaten, according to the stable state definite value setting content being sent by Ethernet interface by quality of power supply overall analysis system, the voltage/current sampled data of accumulation certain hour, continue to calculate quality of power supply steady state data, and by predefined data type, quality of power supply steady state data is preserved, and by backboard data bus, result of calculation is sent to data analysis module and be further processed; On the other hand according to the transient state disturbance definite value setting content being sent by quality of power supply overall analysis system, real-time sampling raw data is carried out to transient state disturbance and start judgement, if meet transient state disturbance entry condition, described real-time sampling raw data is Power Quality Transient Disturbance, and by predefined data type, Power Quality Transient Disturbance is preserved, and by backboard data bus, raw data is sent to data analysis module and be further processed.
Described data analysis module receives respectively quality of power supply steady state data and the Power Quality Transient Disturbance of described data acquisition and pretreatment module.
The quality of power supply steady state data of reception is carried out secondary calculating by described data analysis module, the quality of power supply stable state trend data that statistics secondary calculating goes out, automatically generate the stable state trend file that meets predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in described quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine, described secondary calculating comprises rated output, power factor and electric energy, and wherein power comprises active power, reactive power and applied power.
Described data analysis module is also according to the time mark of Temporal Data and data characteristics, the Power Quality Transient Disturbance of reception is carried out to transient state disturbance intelligent decision, described transient state disturbance intelligent decision is the validity that adopts multiple transient power quality analytical noisy data, to effective transient state noisy data, rapid extraction transient power quality information, analyze the initial time of transient state disturbance, duration and disturbance amplitude, transient state disturbance event is classified, above-mentioned transient information analysis result is generated automatically to the transient state recorded wave file of predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in described quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine, described transient power quality analytical approach comprises Fast Wavelet analytical approach, S transform analysis method, and time-domain difference analytical approach.
The raw data that described data analysis module also starts judgement by Ethernet interface by transient state disturbance directly sends quality of power supply overall analysis system.
Time period and circuit name that described data analysis module is also selected according to user, add up voltage deviation, frequency departure, three-phase imbalance, harmonic wave, voltage fluctuation and flickering, and generate corresponding quality of power supply stable state statistical report.
Described data analysis module also carries out off-line analysis to each transient state recorded wave file, and generates corresponding Power Quality Transient analysis report.
Described signal input module, comprise the plurality of voltages/current input circuit connecting step by step, isolation conversion and filtering circuit, voltage/current signals sampling hold circuit and analog/digital (Analog/Digital, initialism is A/D) sample circuit, the signal of the phase voltage mutual inductor of monitoring field and threephase current transformer is accessed described plurality of voltages/electric current inspection input circuit by described signal input module, receive three-phase voltage and the three-phase current of monitoring point, by described isolation change and filtering circuit isolate conversion and filtering, take multichannel current voltage/current channel simulating signal by the sampling switch of described voltage/current signals sampling hold circuit again, and current voltage/current channel simulating signal is kept, finally by described A/D sample circuit, plurality of voltages/current channel simulating signal is converted to plurality of voltages/current channel digital signal and gathers, send data acquisition to and analysis module is processed by backboard data bus.
The application technology problem of quality of power supply harvester of the present invention in quality of power supply overall analysis system solved by the following technical programs.
The feature of the application of this quality of power supply harvester in quality of power supply overall analysis system is:
Described quality of power supply overall analysis system is the back-stage management machine that is provided with embedded power quality stable state/transient state Comprehensive Analysis Software, be connected with described quality of power supply harvester by Ethernet interface, receive quality of power supply steady state data and Temporal Data that described quality of power supply harvester transmits in real time, realize definite value configuration, quality of power supply file management, show real-time waveform data and electric energy quality real-time monitoring, data derive and print, and power quality analysis, described quality of power supply steady state data is to comprise voltage, the result of calculation of the Steady-state Parameters of current effective value and frequency, described Power Quality Transient Disturbance is the raw data that transient state disturbance starts judgement.
The application technology problem of quality of power supply harvester of the present invention in quality of power supply overall analysis system solved by following further technical scheme.
Described back-stage management machine is the one in PC and industrial computer.
The configuration of described definite value is to check, arrange and send the out-of-limit and transient state disturbance definite value of quality of power supply stable state.
Described quality of power supply file management, is stable state trend file and the transient state recorded wave file that described quality of power supply harvester is transmitted in real time, is stored in the hard disk of back-stage management machine.
Described displaying real-time waveform data and electric energy quality real-time monitoring are that voltage current waveform data and the quality of power supply steady state data to access device carries out showing in real time and refreshing in real time.
Described data derive and print, and being derives and print quality of power supply steady state data and Power Quality Transient Disturbance.
Described power quality analysis comprises quality of power supply stable state statistics, reads stable state trend file, reads transient state record ripple and Power Quality Transient analysis, and the quality of power supply is comprehensively analyzed.
Described quality of power supply stable state statistics, is time period and the circuit name of selecting according to user, voltage deviation, frequency departure, three-phase imbalance, harmonic wave, voltage fluctuation and flickering is added up, and generated corresponding quality of power supply stable state statistical report.
The described stable state trend file of reading, time period and the multiple Steady-state Parameters index of selecting according to user, analyze variation tendency and the impact of every Steady-state Parameters on transient event of each quality of power supply Steady-state Parameters, and generate corresponding quality of power supply stable state trend analysis report.
The described transient state of reading is recorded ripple and Power Quality Transient analysis, according to the Power Quality Transient recorded wave file of user's selection and unified time mark, automatically when transferring transient event and quality of power supply steady state data for the previous period, transient event occur occurring and the Power Quality Transient recorded wave file of transient event after occurring, and each transient state recorded wave file is carried out to off-line analysis, and generate corresponding Power Quality Transient analysis report.
The described quality of power supply is comprehensively analyzed, according to the Power Quality Transient recorded wave file of user's selection and unified time mark, automatically transfer transient event occur for the previous period, transient event occur time and transient event occur after quality of power supply steady state data, analyze variation tendency and the impact of every Steady-state Parameters on transient event of each quality of power supply Steady-state Parameters, determine that every Steady-state Parameters is in the weight ratio causing in transient state transient event possibility, accurately location Power Quality Transient event reason, and generate the comprehensive analysis report of the corresponding quality of power supply.
The application technology problem of quality of power supply harvester of the present invention in quality of power supply overall analysis system by below further technical scheme solved.
The application of described quality of power supply harvester in quality of power supply overall analysis system, has following step successively:
1) input signal A/D conversion
Quality of power supply harvester is arranged on to monitoring field, the signal of the phase voltage mutual inductor of monitoring field and threephase current transformer is accessed described plurality of voltages/electric current inspection input circuit by the signal input module of quality of power supply harvester, receive multichannel three-phase voltage and the three-phase current of monitoring point, by described isolation change and filtering circuit isolate conversion and filtering, take multichannel current voltage/current channel simulating signal by the sampling switch of described voltage/current signals sampling hold circuit again, and current voltage/current channel simulating signal is kept, finally by described A/D sample circuit, plurality of voltages/current channel simulating signal is converted to plurality of voltages/current channel digital signal and gathers, send data acquisition to and analysis module is processed by backboard data bus,
2) sampled point is beaten markers
Quality of power supply harvester to time module by FPGA the 1PPS to external time service device or time service unit, IRIG-B signal resolve, generate high-precision external timing signal, sampled point is beaten to markers;
3) preliminary stable parameter calculation
Data acquisition and pretreatment module in data acquisition and the analysis module of quality of power supply harvester, from backboard data bus, read in real time the plurality of voltages/current sampling data of target sampled point while having beaten, according to the stable state definite value setting content being sent by Ethernet interface by quality of power supply overall analysis system, the voltage/current sampled data of accumulation certain hour, continue to calculate quality of power supply steady state data, and by predefined data type, quality of power supply steady state data is preserved, and by backboard data bus, result of calculation being sent to data analysis module is further processed,
4) transient state disturbance judgement
Data acquisition and pretreatment module in data acquisition and the processing module of quality of power supply harvester, according to the transient state disturbance definite value setting content being sent by quality of power supply overall analysis system, real-time sampling raw data is carried out to transient state disturbance and start judgement, if meet transient state disturbance entry condition, described real-time sampling raw data is Power Quality Transient Disturbance, and by predefined data type, Power Quality Transient Disturbance is preserved, and by backboard data bus, raw data is sent to data analysis module and be further processed;
5) stable state trend data calculates
Data analysis module in data acquisition and the processing module of quality of power supply harvester receives the quality of power supply steady state data of described data acquisition and pretreatment module, the quality of power supply steady state data of reception is carried out to secondary calculating, the quality of power supply stable state trend data that statistics secondary calculating goes out, automatically generate the stable state trend file that meets predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in described quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine, described secondary calculating comprises rated output, power factor and electric energy, wherein power comprises active power, reactive power and applied power,
6) transient power quality judgement
Data analysis module in data acquisition and the processing module of quality of power supply harvester receives the Power Quality Transient Disturbance of described data acquisition and pretreatment module, according to the time mark of Temporal Data and data characteristics, the Power Quality Transient Disturbance of reception is carried out to transient state disturbance intelligent decision, described transient state disturbance intelligent decision adopts multiple transient power quality analytical approach, analyze the validity of noisy data, to effective transient state noisy data, rapid extraction transient power quality information, analyze the initial time of transient state disturbance, duration, disturbance amplitude, transient state disturbance event is classified, above-mentioned transient information analysis result is generated automatically to the transient state recorded wave file of predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in described quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine, described transient power quality analytical approach comprises Fast Wavelet analytical approach, S transform analysis method and time-domain difference analytical approach,
7) generating electric energy quality stable state statistical report and Power Quality Transient analysis report
Time period and circuit name that data analysis module in data acquisition and the processing module of quality of power supply harvester is selected according to user, voltage deviation, frequency departure, three-phase imbalance, harmonic wave, voltage fluctuation and flickering are added up, and generate corresponding quality of power supply stable state statistical report, also each transient state recorded wave file is carried out to off-line analysis, and generate corresponding Power Quality Transient analysis report;
8) comprehensively analyze the quality of power supply
The Power Quality Transient recorded wave file of selecting according to user and unified time mark, automatically transferring transient event occurs for the previous period, quality of power supply steady state data when transient event occurs and after transient event generation, analyze variation tendency and the impact of every Steady-state Parameters on transient event of each quality of power supply Steady-state Parameters, determine its weight ratio, accurately location Power Quality Transient event reason, and generate the comprehensive analysis report of the corresponding quality of power supply, check, arrange and send the out-of-limit and transient state disturbance definite value of quality of power supply stable state, the interface of real-time exhibition power quality data, and derive and printing quality of power supply Steady state and transient state data.
The present invention's beneficial effect is compared with prior art:
Quality of power supply harvester of the present invention is based on sampled point markers accurately, Real-time Collection Power Quality Transient and steady state data, real-time is high, do not miss any disturbance event, envelope that can rapid extraction signal, locate exactly the initial time that transient power quality disturbance occurs, duration, the transient state features such as disturbance amplitude, guarantee the correctness that transient information extracts, the comprehensive analytical applications that Power Quality Transient and stable state are combined, can make up the defect that real-time is poor and calculated amount is large of Power Quality Transient algorithm, accurately location Power Quality Transient event reason, facilitate user's looking up the fault, formulate realistic power quality controlling scheme, ensure the safe and stable operation of electric system and equipment.The present invention can be widely used in the various quality of power supply and other relevant data acquisition and analyze occasion.
Brief description of the drawings
Fig. 1 is the compositional block diagram of the quality of power supply harvester of the specific embodiment of the invention;
Fig. 2 is the application schematic diagram of the specific embodiment of the invention in quality of power supply overall analysis system.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention will be described.
A kind of quality of power supply harvester as shown in Fig. 1～2, be arranged on monitoring field, be connected with voltage/current transducer signal output terminal and the external timing signal output terminal of monitoring field, power quality index comprises frequency, voltage effective value/deviation, current effective value/deviation, voltage/current harmonic wave, voltage/current order component and three-phase imbalance.
The quality of power supply harvester of this embodiment, comprise the power module that stabilized power source is provided to each component parts, signal input module, external time service device or time service unit to time module, with to time the module data acquisition and the analysis module that are connected, respectively with signal input module, to time the module backboard data bus that is connected with data acquisition and analysis module, and be connected with data acquisition and analysis module for the Ethernet interface of quality of power supply overall analysis system communication, to time module the synchronizing signal of external time service device or time service unit is converted to external timing signal, the unified synchronous clock of target while providing as accurate sampled point to data acquisition and analysis module and signal input module, with the high precision of guaranteeing that data acquisition and analysis module gather, and in real time the quality of power supply steady state data of collection and Temporal Data are sent to quality of power supply overall analysis system by Ethernet interface, realize definite value configuration, quality of power supply file management, show real-time waveform data and electric energy quality real-time monitoring, data derive and print, and power quality analysis, quality of power supply steady state data is to comprise voltage, the result of calculation of the Steady-state Parameters of current effective value and frequency, Power Quality Transient Disturbance is the raw data that transient state disturbance starts judgement.
To time module comprise on-the-spot Programmadle logic gate array FPGA for resolving control, to time CPU and constant-temperature crystal oscillator OCXO, to time module by FPGA the 1PPS to external time service device or time service unit, target range instrument group IRIG-B signal resolve, generate high-precision clock signal, in the time that outside satellite-signal disappears, accurately kept time by OCXO, ensure the correctness of time signal, after satellite-signal recovers, automatically switch to again external sync clock to time mode, external time service unit is global position system GPS clock.
Data acquisition and analysis module, comprise the central processor unit CPU, flash memory CF device and the network interface that are provided with data acquisition and pretreatment module and data analysis module, data acquisition and pretreatment module for the real time data of synchronous acquisition plurality of voltages/current channel, receive to time the module high-precision clock signal that generates, sampled point is beaten to markers, CF device is CF card, the quality of power supply stable state trend file and the transient state recorded wave file that generate for storing the data analysis module of CPU element.
Data acquisition and pretreatment module, from backboard data bus, read in real time on the one hand plurality of voltages/the current sampling data of target sampled point while having beaten, according to the stable state definite value setting content being sent by Ethernet interface by quality of power supply overall analysis system, the voltage/current sampled data of accumulation certain hour, continue to calculate quality of power supply steady state data, and by predefined data type, quality of power supply steady state data is preserved, and by backboard data bus, result of calculation is sent to data analysis module and be further processed; On the other hand according to the transient state disturbance definite value setting content being sent by quality of power supply overall analysis system, real-time sampling raw data is carried out to transient state disturbance and start judgement, if meet transient state disturbance entry condition, real-time sampling raw data is Power Quality Transient Disturbance, and by predefined data type, Power Quality Transient Disturbance is preserved, and by backboard data bus, raw data is sent to data analysis module and be further processed.
Data analysis module receives respectively quality of power supply steady state data and the Power Quality Transient Disturbance of data acquisition and pretreatment module, the quality of power supply steady state data of reception is carried out to secondary calculating, the quality of power supply stable state trend data that statistics secondary calculating goes out, automatically generate the stable state trend file that meets predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine, secondary calculating comprises rated output, power factor and electric energy, wherein power comprises active power, reactive power and applied power, data analysis module is also according to the time mark of Temporal Data and data characteristics, the Power Quality Transient Disturbance of reception is carried out to transient state disturbance intelligent decision, transient state disturbance intelligent decision is the validity that adopts multiple transient power quality analytical noisy data, to effective transient state noisy data, rapid extraction transient power quality information, analyze the initial time of transient state disturbance, duration and disturbance amplitude, transient state disturbance event is classified, above-mentioned transient information analysis result is generated automatically to the transient state recorded wave file of predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine, transient power quality analytical approach comprises Fast Wavelet analytical approach, S transform analysis method, and time-domain difference analytical approach.
The raw data that data analysis module also starts judgement by Ethernet interface by transient state disturbance directly sends quality of power supply overall analysis system;
Time period and circuit name that data analysis module is also selected according to user, add up voltage deviation, frequency departure, three-phase imbalance, harmonic wave, voltage fluctuation and flickering, and generate corresponding quality of power supply stable state statistical report;
Data analysis module also carries out off-line analysis to each transient state recorded wave file, and generates corresponding Power Quality Transient analysis report.
Signal input module, comprise the plurality of voltages/current input circuit connecting step by step, isolation conversion and filtering circuit, voltage/current signals sampling hold circuit and analog/digital A/D sample circuit, signal input module is by signal access plurality of voltages/electric current inspection input circuit of the phase voltage mutual inductor of monitoring field and threephase current transformer, receive three-phase voltage and the three-phase current of monitoring point, isolate conversion and filtering by isolation conversion and filtering circuit, take multichannel current voltage/current channel simulating signal by the sampling switch of voltage/current signals sampling hold circuit again, and current voltage/current channel simulating signal is kept, finally by A/D sample circuit, plurality of voltages/current channel simulating signal is converted to plurality of voltages/current channel digital signal and gathers, send data acquisition to and analysis module is processed by backboard data bus.
Apply the quality of power supply overall analysis system of the quality of power supply harvester of this embodiment, it is the back-stage management machine-PC that is provided with embedded power quality stable state/transient state Comprehensive Analysis Software, be connected with quality of power supply harvester by Ethernet interface, receive quality of power supply steady state data and Temporal Data that quality of power supply harvester transmits in real time, realize definite value configuration, quality of power supply file management, show real-time waveform data and electric energy quality real-time monitoring, data derive and print, and power quality analysis, quality of power supply steady state data is to comprise voltage, the result of calculation of the Steady-state Parameters of current effective value and frequency, Power Quality Transient Disturbance is the raw data that transient state disturbance starts judgement.
Definite value configuration is to check, arrange and send the out-of-limit and transient state disturbance definite value of quality of power supply stable state;
Quality of power supply file management, is stable state trend file and the transient state recorded wave file that described quality of power supply harvester is transmitted in real time, is stored in the hard disk of back-stage management machine;
Showing real-time waveform data and electric energy quality real-time monitoring, is that voltage current waveform data and the quality of power supply steady state data to access device carries out showing in real time and refreshing in real time;
Data derive and print, and being derives and print quality of power supply steady state data and Power Quality Transient Disturbance;
Power quality analysis comprises quality of power supply stable state statistics, reads stable state trend file, reads transient state record ripple and Power Quality Transient analysis, and the quality of power supply is comprehensively analyzed;
Described quality of power supply stable state statistics, is time period and the circuit name of selecting according to user, voltage deviation, frequency departure, three-phase imbalance, harmonic wave, voltage fluctuation and flickering is added up, and generated corresponding quality of power supply stable state statistical report;
Reading stable state trend file, is time period and the multiple Steady-state Parameters index of selecting according to user, analyzes variation tendency and the impact of every Steady-state Parameters on transient event of each quality of power supply Steady-state Parameters, and generates corresponding quality of power supply stable state trend analysis report;
Read transient state record ripple and Power Quality Transient analysis, according to the Power Quality Transient recorded wave file of user's selection and unified time mark, automatically when transferring transient event and quality of power supply steady state data for the previous period, transient event occur occurring and the Power Quality Transient recorded wave file of transient event after occurring, and each transient state recorded wave file is carried out to off-line analysis, and generate corresponding Power Quality Transient analysis report;
The quality of power supply is comprehensively analyzed, according to the Power Quality Transient recorded wave file of user's selection and unified time mark, automatically transfer transient event occur for the previous period, transient event occur time and transient event occur after quality of power supply steady state data, analyze variation tendency and the impact of every Steady-state Parameters on transient event of each quality of power supply Steady-state Parameters, determine that every Steady-state Parameters is in the weight ratio causing in transient state transient event possibility, accurately location Power Quality Transient event reason, and generate the comprehensive analysis report of the corresponding quality of power supply.
The application of the quality of power supply harvester of this embodiment in quality of power supply overall analysis system, has following step successively:
1) input signal A/D conversion
Quality of power supply harvester is arranged on to monitoring field, the signal input module of quality of power supply harvester is by signal access plurality of voltages/electric current inspection input circuit of the phase voltage mutual inductor of monitoring field and threephase current transformer, receive multichannel three-phase voltage and the three-phase current of monitoring point, isolate conversion and filtering by isolation conversion and filtering circuit, take multichannel current voltage/current channel simulating signal by the sampling switch of voltage/current signals sampling hold circuit again, and current voltage/current channel simulating signal is kept, finally by A/D sample circuit, plurality of voltages/current channel simulating signal is converted to plurality of voltages/current channel digital signal and gathers, send data acquisition to and analysis module is processed by backboard data bus,
2) sampled point is beaten markers
Quality of power supply harvester to time module by FPGA, 1PPS, the IRIG-B signal of external time service unit-global position system GPS clock are resolved, generate high-precision external timing signal, sampled point is beaten to markers;
3) preliminary stable parameter calculation
Data acquisition and pretreatment module in data acquisition and the analysis module of quality of power supply harvester, from backboard data bus, read in real time the plurality of voltages/current sampling data of target sampled point while having beaten, according to the stable state definite value setting content being sent by Ethernet interface by quality of power supply overall analysis system, the voltage/current sampled data of accumulation certain hour, continue to calculate quality of power supply steady state data, and by predefined data type, quality of power supply steady state data is preserved, and by backboard data bus, result of calculation being sent to data analysis module is further processed,
4) transient state disturbance judgement
Data acquisition and pretreatment module in data acquisition and the processing module of quality of power supply harvester, according to the transient state disturbance definite value setting content being sent by quality of power supply overall analysis system, real-time sampling raw data is carried out to transient state disturbance and start judgement, if meet transient state disturbance entry condition, real-time sampling raw data is Power Quality Transient Disturbance, and by predefined data type, Power Quality Transient Disturbance is preserved, and the raw data transmission data analysis module that transient state disturbance is started to judgement by backboard data bus is further processed;
5) stable state trend data calculates
Data analysis module in data acquisition and the processing module of quality of power supply harvester receives the quality of power supply steady state data of data acquisition and pretreatment module, the quality of power supply steady state data of reception is carried out to secondary calculating, the quality of power supply stable state trend data that statistics secondary calculating goes out, automatically generate the stable state trend file that meets predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in described quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine, secondary calculating comprises rated output, power factor and electric energy, wherein power comprises active power, reactive power and applied power,
6) transient power quality judgement
Data analysis module in data acquisition and the processing module of quality of power supply harvester receives the Power Quality Transient Disturbance of described data acquisition and pretreatment module, according to the time mark of Temporal Data and data characteristics, the Power Quality Transient Disturbance of reception is carried out to transient state disturbance intelligent decision, transient state disturbance intelligent decision adopts multiple transient power quality analytical approach, analyze the validity of noisy data, to effective transient state noisy data, rapid extraction transient power quality information, analyze the initial time of transient state disturbance, duration, disturbance amplitude, transient state disturbance event is classified, above-mentioned transient information analysis result is generated automatically to the transient state recorded wave file of predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine, transient power quality analytical approach comprises Fast Wavelet analytical approach, S transform analysis method and time-domain difference analytical approach,
7) generating electric energy quality stable state statistical report and Power Quality Transient analysis report
Time period and circuit name that data analysis module in data acquisition and the processing module of quality of power supply harvester is selected according to user, voltage deviation, frequency departure, three-phase imbalance, harmonic wave, voltage fluctuation and flickering are added up, and generate corresponding quality of power supply stable state statistical report, also each transient state recorded wave file is carried out to off-line analysis, and generate corresponding Power Quality Transient analysis report;
8) comprehensively analyze the quality of power supply
The Power Quality Transient recorded wave file of selecting according to user and unified time mark, automatically transferring transient event occurs for the previous period, quality of power supply steady state data when transient event occurs and after transient event generation, analyze variation tendency and the impact of every Steady-state Parameters on transient event of each quality of power supply Steady-state Parameters, determine its weight ratio, accurately location Power Quality Transient event reason, and generate the comprehensive analysis report of the corresponding quality of power supply, check, arrange and send the out-of-limit and transient state disturbance definite value of quality of power supply stable state, the interface of real-time exhibition power quality data, and derive and printing quality of power supply Steady state and transient state data.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention; make without departing from the inventive concept of the premise some alternative or obvious modification that are equal to; and performance or purposes identical, all should be considered as belonging to the present invention by the definite scope of patent protection of submitted to claims.
Claims (10)
1. a quality of power supply harvester, be arranged on monitoring field, be connected with voltage/current transducer signal output terminal and the external timing signal output terminal of monitoring field, power quality index comprises frequency, voltage effective value/deviation, current effective value/deviation, voltage/current harmonic wave, voltage/current order component and three-phase imbalance, is characterized in that:
Comprise the power module that stabilized power source is provided to each component parts, signal input module, external time service device or time service unit to time module, with described to time the module data acquisition and the analysis module that are connected, respectively with described signal input module, described to time the module backboard data bus that is connected with described data acquisition and analysis module, and be connected with described data acquisition and analysis module for the Ethernet interface of quality of power supply overall analysis system communication, described to time module the synchronizing signal of external time service device or time service unit is converted to external timing signal, the unified synchronous clock of target while providing as accurate sampled point to described data acquisition and analysis module and described signal input module, with the high precision of guaranteeing that described data acquisition and analysis module gather, and in real time the quality of power supply steady state data of collection and Temporal Data are sent to quality of power supply overall analysis system by Ethernet interface, realize definite value configuration, quality of power supply file management, show real-time waveform data and electric energy quality real-time monitoring, data derive and print, and power quality analysis, described quality of power supply steady state data is to comprise voltage, the result of calculation of the Steady-state Parameters of current effective value and frequency, described Power Quality Transient Disturbance is the raw data that transient state disturbance starts judgement.
2. quality of power supply harvester as claimed in claim 1, is characterized in that:
Described to time module comprise the on-the-spot Programmadle logic gate array FPGA for resolving control, to time CPU and constant-temperature crystal oscillator OCXO, described to time module by FPGA the 1PPS to external time service device or time service unit, target range instrument group IRIG-B signal is resolved, generate high-precision clock signal, in the time that outside satellite-signal disappears, accurately kept time by OCXO, ensure the correctness of time signal, after satellite-signal recovers, automatically switch to again external sync clock to time mode, described external time service device or time service unit are Big Dipper positioning system clocks, one in global position system GPS clock.
3. quality of power supply harvester as claimed in claim 2, is characterized in that:
Described data acquisition and analysis module, comprise the central processor unit CPU, flash memory CF device and the network interface that are provided with data acquisition and pretreatment module and data analysis module, described data acquisition and pretreatment module for the real time data of synchronous acquisition plurality of voltages/current channel, receive to time the module high-precision clock signal that generates, sampled point is beaten to markers, described CF device is CF card, quality of power supply stable state trend file and transient state recorded wave file that described CF card generates for storing the data analysis module of CPU element.
4. quality of power supply harvester as claimed in claim 3, is characterized in that:
Described data acquisition and pretreatment module, from backboard data bus, read in real time on the one hand plurality of voltages/the current sampling data of target sampled point while having beaten, according to the stable state definite value setting content being sent by Ethernet interface by quality of power supply overall analysis system, the voltage/current sampled data of accumulation certain hour, continue to calculate quality of power supply steady state data, and by predefined data type, quality of power supply steady state data is preserved, and by backboard data bus, result of calculation is sent to data analysis module and be further processed; On the other hand according to the transient state disturbance definite value setting content being sent by quality of power supply overall analysis system, real-time sampling raw data is carried out to transient state disturbance and start judgement, if meet transient state disturbance entry condition, described real-time sampling raw data is Power Quality Transient Disturbance, and by predefined data type, Power Quality Transient Disturbance is preserved, and by backboard data bus, raw data is sent to data analysis module and be further processed.
5. quality of power supply harvester as claimed in claim 4, is characterized in that:
Described data analysis module receives respectively quality of power supply steady state data and the Power Quality Transient Disturbance of described data acquisition and pretreatment module;
The quality of power supply steady state data of reception is carried out secondary calculating by described data analysis module, the quality of power supply stable state trend data that statistics secondary calculating goes out, automatically generate the stable state trend file that meets predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in described quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine, described secondary calculating comprises rated output, power factor and electric energy, and wherein power comprises active power, reactive power and applied power;
Described data analysis module is also according to the time mark of Temporal Data and data characteristics, the Power Quality Transient Disturbance of reception is carried out to transient state disturbance intelligent decision, described transient state disturbance intelligent decision is the validity that adopts multiple transient power quality analytical noisy data, to effective transient state noisy data, rapid extraction transient power quality information, analyze the initial time of transient state disturbance, duration and disturbance amplitude, transient state disturbance event is classified, above-mentioned transient information analysis result is generated automatically to the transient state recorded wave file of predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in described quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine, described transient power quality analytical approach comprises Fast Wavelet analytical approach, S transform analysis method, and time-domain difference analytical approach.
6. quality of power supply harvester as claimed in claim 5, is characterized in that:
The raw data that described data analysis module also starts judgement by Ethernet interface by transient state disturbance directly sends quality of power supply overall analysis system;
Time period and circuit name that described data analysis module is also selected according to user, add up voltage deviation, frequency departure, three-phase imbalance, harmonic wave, voltage fluctuation and flickering, and generate corresponding quality of power supply stable state statistical report;
Described data analysis module also carries out off-line analysis to each transient state recorded wave file, and generates corresponding Power Quality Transient analysis report.
7. quality of power supply harvester as claimed in claim 6, is characterized in that:
Described signal input module, comprise the plurality of voltages/current input circuit connecting step by step, isolation conversion and filtering circuit, voltage/current signals sampling hold circuit and analog/digital A/D sample circuit, the signal of the phase voltage mutual inductor of monitoring field and threephase current transformer is accessed described plurality of voltages/electric current inspection input circuit by described signal input module, receive three-phase voltage and the three-phase current of monitoring point, by described isolation change and filtering circuit isolate conversion and filtering, take multichannel current voltage/current channel simulating signal by the sampling switch of described voltage/current signals sampling hold circuit again, and current voltage/current channel simulating signal is kept, finally by described A/D sample circuit, plurality of voltages/current channel simulating signal is converted to plurality of voltages/current channel digital signal and gathers, send data acquisition to and analysis module is processed by backboard data bus.
8. the application of the quality of power supply harvester as described in claim 1-7 any one in quality of power supply overall analysis system, is characterized in that:
Described quality of power supply overall analysis system is the back-stage management machine that is provided with embedded power quality stable state/transient state Comprehensive Analysis Software, be connected with described quality of power supply harvester by Ethernet interface, receive quality of power supply steady state data and Temporal Data that described quality of power supply harvester transmits in real time, realize definite value configuration, quality of power supply file management, show real-time waveform data and electric energy quality real-time monitoring, data derive and print, and power quality analysis, described quality of power supply steady state data is to comprise voltage, the result of calculation of the Steady-state Parameters of current effective value and frequency, described Power Quality Transient Disturbance is the raw data that transient state disturbance starts judgement.
9. the application of quality of power supply harvester as claimed in claim 8 in quality of power supply overall analysis system, is characterized in that:
Described back-stage management machine is the one in PC and industrial computer;
The configuration of described definite value is to check, arrange and send the out-of-limit and transient state disturbance definite value of quality of power supply stable state;
Described quality of power supply file management, is stable state trend file and the transient state recorded wave file that described quality of power supply harvester is transmitted in real time, is stored in the hard disk of back-stage management machine;
Described displaying real-time waveform data and electric energy quality real-time monitoring are that voltage current waveform data and the quality of power supply steady state data to access device carries out showing in real time and refreshing in real time;
Described data derive and print, and being derives and print quality of power supply steady state data and Power Quality Transient Disturbance;
Described power quality analysis comprises quality of power supply stable state statistics, reads stable state trend file, reads transient state record ripple and Power Quality Transient analysis, and the quality of power supply is comprehensively analyzed;
Described quality of power supply stable state statistics, is time period and the circuit name of selecting according to user, voltage deviation, frequency departure, three-phase imbalance, harmonic wave, voltage fluctuation and flickering is added up, and generated corresponding quality of power supply stable state statistical report;
The described stable state trend file of reading, time period and the multiple Steady-state Parameters index of selecting according to user, analyze variation tendency and the impact of every Steady-state Parameters on transient event of each quality of power supply Steady-state Parameters, and generate corresponding quality of power supply stable state trend analysis report;
The described transient state of reading is recorded ripple and Power Quality Transient analysis, according to the Power Quality Transient recorded wave file of user's selection and unified time mark, automatically when transferring transient event and quality of power supply steady state data for the previous period, transient event occur occurring and the Power Quality Transient recorded wave file of transient event after occurring, and each transient state recorded wave file is carried out to off-line analysis, and generate corresponding Power Quality Transient analysis report;
The described quality of power supply is comprehensively analyzed, according to the Power Quality Transient recorded wave file of user's selection and unified time mark, automatically transfer transient event occur for the previous period, transient event occur time and transient event occur after quality of power supply steady state data, analyze variation tendency and the impact of every Steady-state Parameters on transient event of each quality of power supply Steady-state Parameters, determine that every Steady-state Parameters is in the weight ratio causing in transient state transient event possibility, accurately location Power Quality Transient event reason, and generate the comprehensive analysis report of the corresponding quality of power supply.
10. the application of quality of power supply harvester in quality of power supply overall analysis system as claimed in claim 8 or 9, is characterized in that:
There is successively following step:
1) input signal A/D conversion
Quality of power supply harvester is arranged on to monitoring field, the signal of the phase voltage mutual inductor of monitoring field and threephase current transformer is accessed described plurality of voltages/electric current inspection input circuit by the signal input module of quality of power supply harvester, receive multichannel three-phase voltage and the three-phase current of monitoring point, by described isolation change and filtering circuit isolate conversion and filtering, take multichannel current voltage/current channel simulating signal by the sampling switch of described voltage/current signals sampling hold circuit again, and current voltage/current channel simulating signal is kept, finally by described A/D sample circuit, plurality of voltages/current channel simulating signal is converted to plurality of voltages/current channel digital signal and gathers, send data acquisition to and analysis module is processed by backboard data bus,
2) sampled point is beaten markers
Quality of power supply harvester to time module by FPGA the 1PPS to external time service device or time service unit, IRIG-B signal resolve, generate high-precision external timing signal, sampled point is beaten to markers;
3) preliminary stable parameter calculation
Data acquisition and pretreatment module in data acquisition and the analysis module of quality of power supply harvester, from backboard data bus, read in real time the plurality of voltages/current sampling data of target sampled point while having beaten, according to the stable state definite value setting content being sent by Ethernet interface by quality of power supply overall analysis system, the voltage/current sampled data of accumulation certain hour, continue to calculate quality of power supply steady state data, and by predefined data type, quality of power supply steady state data is preserved, and by backboard data bus, result of calculation being sent to data analysis module is further processed,
4) transient state disturbance judgement
Data acquisition and pretreatment module in data acquisition and the processing module of quality of power supply harvester, according to the transient state disturbance definite value setting content being sent by quality of power supply overall analysis system, real-time sampling raw data is carried out to transient state disturbance and start judgement, if meet transient state disturbance entry condition, described real-time sampling raw data is Power Quality Transient Disturbance, and by predefined data type, Power Quality Transient Disturbance is preserved, and the raw data transmission data analysis module that transient state disturbance is started to judgement by backboard data bus is further processed;
5) stable state trend data calculates
Data analysis module in data acquisition and the processing module of quality of power supply harvester receives the quality of power supply steady state data of described data acquisition and pretreatment module, the quality of power supply steady state data of reception is carried out to secondary calculating, described secondary calculating comprises rated output, power factor and electric energy, wherein power comprises active power, reactive power and applied power, the quality of power supply stable state trend data that statistics secondary calculating goes out, automatically generate the stable state trend file that meets predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in described quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine,
6) transient power quality judgement
Data analysis module in data acquisition and the processing module of quality of power supply harvester receives the Power Quality Transient Disturbance of described data acquisition and pretreatment module, according to the time mark of Temporal Data and data characteristics, the Power Quality Transient Disturbance of reception is carried out to transient state disturbance intelligent decision, described transient state disturbance intelligent decision adopts multiple transient power quality analytical approach, described transient power quality analytical approach comprises Fast Wavelet analytical approach, S transform analysis method and time-domain difference analytical approach, analyze the validity of noisy data, to effective transient state noisy data, rapid extraction transient power quality information, analyze the initial time of transient state disturbance, duration, disturbance amplitude, transient state disturbance event is classified, above-mentioned transient information analysis result is generated automatically to the transient state recorded wave file of predefine structure, in the storage of CF card, and corresponding data are sent to the back-stage management machine in described quality of power supply overall analysis system by Ethernet interface, be stored in the hard disk of back-stage management machine,
7) generating electric energy quality stable state statistical report and Power Quality Transient analysis report
Time period and circuit name that data analysis module in data acquisition and the processing module of quality of power supply harvester is selected according to user, voltage deviation, frequency departure, three-phase imbalance, harmonic wave, voltage fluctuation and flickering are added up, and generate corresponding quality of power supply stable state statistical report, also each transient state recorded wave file is carried out to off-line analysis, and generate corresponding Power Quality Transient analysis report;
8) comprehensively analyze the quality of power supply
The Power Quality Transient recorded wave file of selecting according to user and unified time mark, automatically transferring transient event occurs for the previous period, quality of power supply steady state data when transient event occurs and after transient event generation, analyze variation tendency and the impact of every Steady-state Parameters on transient event of each quality of power supply Steady-state Parameters, determine its weight ratio, accurately location Power Quality Transient event reason, and generate the comprehensive analysis report of the corresponding quality of power supply, check, arrange and send the out-of-limit and transient state disturbance definite value of quality of power supply stable state, the interface of real-time exhibition power quality data, and derive and printing quality of power supply Steady state and transient state data.
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