CN202196121U - Flexible and synchronous harmonic monitoring system of wide-area power grid - Google Patents
Flexible and synchronous harmonic monitoring system of wide-area power grid Download PDFInfo
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Abstract
The utility model discloses a flexible and synchronous harmonic monitoring system of a wide-area power grid, belonging to the technical field of power-system monitoring. The flexible and synchronous monitoring system comprises synchronous harmonic monitoring terminals, a communication system and a harmonic monitoring center platform which are connected in sequence, wherein the synchronous harmonic monitoring terminals are used for receiving a monitoring task sent by the harmonic monitoring center platform, measuring the harmonic waves of the power grid synchronously according to the monitoring task and then transmitting a synchronously-measured result to the harmonic monitoring center platform by the communication system; the communication system is used for transmitting the monitoring task and the synchronously-measured result of all the synchronous harmonic monitoring terminals; and the harmonic monitoring center platform is used for determining the installation positions of all the harmonic monitoring terminals and sending the monitoring task to all the synchronous harmonic monitoring terminals by the communication system, and is also used for receiving the synchronously-measured result of all the synchronous harmonic monitoring terminals and carrying out processing and outputting on the received synchronously-measured result. In the flexible and synchronous harmonic monitoring system, the defect of poor instantaneity of measurement is overcome and the utilization ratio of a measuring terminal is improved.
Description
Technical field
The utility model belongs to the power system monitoring technical field, relates in particular to a kind of harmonic wave of The Wide Area Power flexibly synchronous monitoring system.
Background technology
In recent years; Transverter, frequency control, electric arc furnaces, electric railway, home electronics and various power electronic equipment constantly increase in the power distribution network; The usefulness electrical characteristics of these loads (non-linear, impact and asymmetry) make the voltage and current waveform generation severe distortion in the electric system, Here it is electric harmonic.In utility network; Harmonic wave makes power supply and consumer is overheated, electric energy loss increases; Influence their normal operation; Light then reduce the serviceable life of equipment and the power factor of system, heavy then can cause short circuit and the responsive equipment malfunctions such as relay protection of harmonic wave are done, even burn components and parts, motor or transformer.The improvement of therefore, Harmonious Waves in Power Systems being polluted has become the problem that electrician's science and technology circle institute must solution.It is significant to searching harmonic source and then carrying out harmonic wave control to monitor mains by harmonics accurately and effectively.
Electric harmonic detects generally will obtain following amount: the containing ratio of single harmonic component voltage, electric current; Harmonic voltage, the resultant distortion rate of electric current; Sometimes also need measure phasing degree, the impedance of harmonic power harmonic of harmonic wave.Each state all the Harmonious Waves in Power Systems real-time analysis as research emphasis, and with this as understanding harmonic wave and the basis that suppresses harmonic wave.
See that from the surveying instrument aspect developed country is in development and use aspect the harmonic analysis instrument development comparatively rapid, instrument advanced in performance, measurement function is complete, and is applied widely.Japan successfully developed be used for that on-site real-time measure to be printed, real-time analysis waveform and the record of data and the 3195 types numeral electric energy analyser of Presentation Function, the precision of voltage, electric current and power reaches 0.1 grade, harmonic measure precision mould value is less than 2%.The unilyzer900F portable electric energy mass-synchrometer of the AN2060 Design of hand-held power harmonic analyser of the NOWA-1 type harmonic analysis instrument that Germany produces, the development of lime company, the development of Sweden unipower company etc.; All have the quality of power supply is monitored; Record data, the functions such as the flow direction of analysis each harmonic content and aberration rate and power.
With abroad compare, still there are big gap in China's harmonic analysis in power system and Study on Measurement.Domestic surveying instrument reliability and precision aspect wait to improve, and mainly are applicable to the harmonic measure aspect, and wave form analysis, the selection of adopting window, data processing and as a result output facet certain gap is arranged.
Digital, robotization of a new generation now and intelligent harmonic monitoring appearance are the direction and the trend of development.Particularly in recent years, in the context of detection widespread use, especially in multiparameter, multichannel test, has very much the development research meaning based on the embedded system of DSP, ARM and PC104.DSP has the real-time addressing function of very high arithmetic speed and very big storage space, along with the decline of its price, can obtain great development in China in the future.
About harmonic wave synchronous monitoring system aspects, some areas have been set up the Harmonious Waves in Power Systems measurement system (Harmonic Measurement System HMS), can have been realized multimetering, but is not synchro measure between these measurement points at present.And HMS adopts basically is fixing networking model.
Traditional harmonic monitoring generally adopts portable instrument to carry out periodic measurement, and measurement data has certain limitation, can not the interior mains by harmonics situation of conversion zone.Along with the information networking development; Domestic city-level Utilities Electric Co. major part has realized Construction of LAN; Can carry out the networking harmonic monitoring through hard-wired monitoring device; But the data between the website monitoring device are in non-synchronous sampling to be measured, and monitoring device mostly is fixed installation at present, and the harmonic monitoring place does not change.Its major defect has following 2 points:
(1) measurement mechanism of each harmonic wave measuring point can not synchronized sampling; Can not realize the synchronous monitoring to whole mains by harmonics, this is for the harmonic wave state estimation, the harmonic trend of computational grid; Analyze the current intelligence and the amplification situation of harmonic wave, it is disadvantageous seeking harmonic source and carrying out harmonic wave control;
(2) harmonic measuring device is fixedly installed in tested electrical network, and still continuation is monitored and can not be made it be applied to the harmonic monitoring of the unknown electrical network of harmonic wave state after the harmonic wave situation of thoroughly grasping this partial electric grid, causes the harmonic monitoring plant factor low.
Summary of the invention
The purpose of the utility model is, proposes a kind of harmonic wave of The Wide Area Power flexibly synchronous monitoring system, is used to solve present harmonic wave synchronous monitoring systematic survey and lacks real-time and the low problem of measurement mechanism utilization factor.
Technical scheme is, a kind of harmonic wave of The Wide Area Power flexibly synchronous monitoring system is characterized in that said harmonic wave synchronous monitoring system comprises harmonic wave synchronous monitoring terminal, the communication system harmonic monitoring center platform that order links to each other;
Said harmonic wave synchronous monitoring terminal is used to receive the monitoring task that the harmonic monitoring central platform sends, and carries out the synchro measure of mains by harmonics according to the monitoring task, then with the synchro measure result through communication system transmits to the harmonic monitoring central platform;
Communication system is used to transmit the monitoring task that the harmonic monitoring central platform sends, and also is used to transmit the synchro measure result at each harmonic wave synchronous monitoring terminal;
Said harmonic monitoring central platform is used for confirming the installation site at each harmonic wave synchronous monitoring terminal, and the process communication system is to each harmonic wave synchronous monitoring terminal transmitting supervisory task; Also be used to receive the synchro measure result at each harmonic wave synchronous monitoring terminal, and the synchro measure result who receives is handled and exports.
Said harmonic wave synchronous monitoring terminal comprises picking up signal module, forward path module, A/D modular converter and the digital signal processing module that order links to each other; Comprise that also the synchronized sampling waveform that links to each other with digital signal processing module with said A/D modular converter forms module, also comprises the communication module and the input/output module that link to each other with digital signal processing module;
Said picking up signal module is used to pick up analog voltage signal and analog current signal, and analog voltage signal and analog current signal are sent to the forward path module;
Said forward path module is used for analog voltage signal and analog current signal are handled, so that analog voltage signal and analog current signal convert digital voltage signal and digital current signal respectively into;
Said A/D modular converter is used for converting analog voltage signal and analog current signal into digital voltage signal and digital current signal respectively; Also be used to receive the synchronized sampling waveform form module output with sample waveform pulse per second (PPS) PPS signal Synchronization; And digital voltage signal and digital current signal are sampled, and will send to digital signal processing module through the digital voltage signal and the digital current signal of over-sampling according to said and sample waveform pulse per second (PPS) PPS signal Synchronization;
Said synchronized sampling waveform forms module and is used to receive pulse per second (PPS) PPS signal; And under the control of digital signal processing module; The sample waveform of generation and pulse per second (PPS) PPS signal Synchronization, and sample waveform said to the output of A/D modular converter and pulse per second (PPS) PPS signal Synchronization;
Said digital signal processing module is used to control the sample waveform that the synchronized sampling waveform forms module generation and pulse per second (PPS) PPS signal Synchronization; Also be used to receive digital voltage signal and digital current signal, and store said digital voltage signal and digital current signal through over-sampling through over-sampling; Also be used to receive the input information of input/output module; Also be used for through input/output module output said digital voltage signal and digital current signal through over-sampling; Also be used for said digital voltage signal and digital current signal through over-sampling being sent to the harmonic monitoring central platform through communication system through communication module;
Said communication module is used under the control of digital signal processing module, will be sent to communication system through the digital voltage signal and the digital current signal of over-sampling;
Said input/output module is used for to digital signal processing module input information being provided; Also be used under the control of digital signal processing module, exporting digital voltage signal and digital current signal through over-sampling.
Said picking up signal module comprises analog current signal pick-up and analog voltage signal pick-up.
Said forward path module comprises buffer circuit, amplifying circuit, phase regulating circuit, programmable amplifying circuit, active filter circuit and the current potential translation circuit that order links to each other;
Said buffer circuit is used to realize the isolation between the circuit board at the analog current signal that picks up and analog voltage signal and harmonic wave synchronous monitoring terminal, avoids producing electrical Interference;
Said amplifying circuit is used to amplify analog current signal and the analog voltage signal that picks up;
Said phase regulating circuit is used to improve through the analog current signal of amplifying circuit amplification and the angular accuracy mutually of analog voltage signal;
Said programmable amplifying circuit is used for analog current signal after the phase adjusted and analog voltage signal are carried out the ratio amplification;
Said active filter circuit is used for analog current signal after the program control amplification and analog voltage signal being carried out LPF, the filtering high-frequency interferencing signal;
Said current potential translation circuit is used for filtered analog current signal of active filter circuit and analog voltage signal are carried out displacement, realizes the unipolarity input.
Said synchronized sampling waveform forms module and is made up of GPS receiving element and complex programmable logic unit; Said GPS receiving element is used to receive gps signal, and according to the gps signal output pulse per second (PPS) PPS signal that receives; The sample waveform with pulse per second (PPS) PPS signal Synchronization is exported in said complex programmable logic unit under pulse per second (PPS) PPS signal and digital signal processing module control.
Said communication module comprises JR45 interface, RS-232/485 serial ports and USB interface.
Said input/output module comprises keyboard and display.
Said communication system includes spider lines and/or wireless network; Said cable network adopts Ethernet or string line network; Said wireless network adopts 3G, Wi-Fi, GPRS or cdma network.
Said harmonic monitoring central platform comprises harmonic wave synchronous monitoring terminal management center, data processing centre (DPC) and data storage center;
Said harmonic wave synchronous monitoring terminal management center is used to draw the topological structure of tested electrical network, and confirms the installation site at each harmonic wave synchronous monitoring terminal according to the topological structure of tested electrical network; Also be used for simultaneously through communication system to each harmonic wave synchronous monitoring terminal transmitting supervisory task;
Said data processing centre (DPC) is used to receive the synchro measure result at each harmonic wave synchronous monitoring terminal; And the synchro measure result handled, obtain the harmonic parameters of resultant distortion rate, mains by harmonics state and electric network element of resultant distortion rate, the electric current of containing ratio, the voltage of phase place, each primary current harmonic wave of amplitude, each primary current harmonic wave of containing ratio, each primary current harmonic wave of phase place, each time voltage harmonic of amplitude, each time voltage harmonic of each time voltage harmonic;
Said data storage center be used to store the synchro measure result at each harmonic wave synchronous monitoring terminal and the synchro measure result handled after data.
The harmonic wave of the The Wide Area Power flexibly synchronous monitoring system that the utility model provides has realized the synchronous acquisition of each harmonic wave synchronous monitoring terminal voltage signal and current signal, has overcome to measure the defective that lacks real-time; Simultaneously, lay according to the topological structure of tested electrical network flexibly at harmonic wave synchronous monitoring terminal, has improved the utilization factor of measuring terminals.
Description of drawings
Fig. 1 is a The Wide Area Power harmonic wave synchronous monitoring system construction drawing flexibly;
Fig. 2 is harmonic wave synchronous monitoring terminal structure figure;
Fig. 3 is an analog current signal pick-up synoptic diagram;
Fig. 4 is an analog voltage signal pick-up synoptic diagram; Wherein, (a) plug in terminals analog voltage signal pick-up synoptic diagram is a folder formula terminal analog voltage signal pick-up synoptic diagram (b), (c) is pin terminal analog voltage signal pick-up synoptic diagram, (d) is pincerlike terminal analog voltage signal pick-up synoptic diagram;
Fig. 5 is a forward path modular structure synoptic diagram;
Fig. 6 is buffer circuit, amplifying circuit and phase regulating circuit synoptic diagram;
Fig. 7 is that the A/D modular converter is connected synoptic diagram with digital signal processing module;
Fig. 8 is that the synchronized sampling waveform forms modular structure figure;
Fig. 9 is digital signal processing module and JR45 interface CC figure figure;
Figure 10 is digital signal processing module and RS-232/485 serial ports CC figure figure;
Figure 11 is digital signal processing module and USB interface CC figure;
Figure 12 is digital signal processing module expansion EPROM interface circuit figure;
Figure 13 is a harmonic monitoring central platform workflow diagram;
Figure 14 is a harmonic wave synchronous monitoring terminal works process flow diagram.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than scope and application thereof in order to limit the utility model.
Fig. 1 is a The Wide Area Power harmonic wave synchronous monitoring system construction drawing flexibly.Among Fig. 1, the harmonic wave of The Wide Area Power flexibly synchronous monitoring provided by the invention system comprises harmonic wave synchronous monitoring terminal, the communication system harmonic monitoring center platform that order links to each other.Wherein, harmonic wave synchronous monitoring terminal is used to receive the monitoring task that the harmonic monitoring central platform sends, and carries out the synchro measure of mains by harmonics according to the monitoring task, then with the synchro measure result through communication system transmits to the harmonic monitoring central platform.Communication system is used to transmit the monitoring task that the harmonic monitoring central platform sends, and also is used to transmit the synchro measure result at each harmonic wave synchronous monitoring terminal.The harmonic monitoring central platform is used for confirming the installation site at each harmonic wave synchronous monitoring terminal, and the process communication system is to each harmonic wave synchronous monitoring terminal transmitting supervisory task; Also be used to receive the synchro measure result at each harmonic wave synchronous monitoring terminal, and the synchro measure result who receives is handled and exports.
Fig. 2 is harmonic wave synchronous monitoring terminal structure figure.Among Fig. 2; Harmonic wave synchronous monitoring terminal comprises picking up signal module, forward path module, A/D modular converter and the digital signal processing module that order links to each other; Comprise that also the synchronized sampling waveform that links to each other with digital signal processing module with said A/D modular converter forms module, also comprises the communication module and the input/output module that link to each other with digital signal processing module.
Among Fig. 2, the picking up signal module is used to pick up analog voltage signal and analog current signal, and analog voltage signal and analog current signal are sent to the forward path module.The picking up signal module comprises analog current signal pick-up and analog voltage signal pick-up.Fig. 3 is an analog current signal pick-up synoptic diagram, and among Fig. 3, the analog current signal pick-up adopts the linear split core type current transformer of wide-range, makes to need not to open tested current return when measuring, to system under test (SUT) noiseless (or low interference).Tested current range is 5A, picks up the back and is the current signal of 2.5mA.Fig. 4 is an analog voltage signal pick-up synoptic diagram, among Fig. 4, adopts various voltage signals such as folder, pin, sheet to pick up the access terminal, and need not loosening original voltage terminal can insert, to system under test (SUT) noiseless (or low interference).In phase line, seal in resistance R (resistance is 40k Ω), tested voltage range is 100V, picks up the back and is the current signal of 2.5mA.Current measurement adopts the linear split core type current transformer of small-sized wide-range to snap in system under test (SUT) or the CT of system secondary circuit; Voltage measurement is furnished with the adaptive terminal of various grafting (like binding clip, contact pin, inserted sheet etc.); Can select suitable terminal to be connected to system or its PT secondary side according to on-site actual situations, need not change any wiring of system, possess the mode of connection flexibly; Be adapted to the characteristics of the flexible dynamic group net of system, to system under test (SUT) noiseless (or low interference).Signal after voltage, electric current pick up is unified, can set the type (voltage, electric current) of input channel flexibly, can adapt to the needs of actual monitoring, improves usage ratio of equipment.
Among Fig. 2, the forward path module is used for analog voltage signal and analog current signal are handled, so that analog voltage signal and analog current signal convert digital voltage signal and digital current signal respectively into.
Fig. 5 is a forward path modular structure synoptic diagram, and among Fig. 5, the forward path module comprises buffer circuit, amplifying circuit, phase regulating circuit, programmable amplifying circuit, active filter circuit and the current potential translation circuit that order links to each other.
Buffer circuit adopts 1: 1 small-sized voltage transformer (VT), is used to realize the isolation between the circuit board at the analog current signal that picks up and analog voltage signal and harmonic wave synchronous monitoring terminal, avoids producing electrical Interference.
Amplifying circuit is used to amplify analog current signal and the analog voltage signal that picks up, and milliampere level signal is amplified, and produces sizeable current signal, is convenient to the sampling of A/D modular converter.
Fig. 6 is buffer circuit, amplifying circuit and phase regulating circuit synoptic diagram.Among Fig. 6, phase regulating circuit is used to improve through the analog current signal of amplifying circuit amplification and the angular accuracy mutually of analog voltage signal, through regulating R
2Resistance can regulate correction to the phase place of every channel signal, improve the phase angle synchronization accuracy of the phasor of surveying between different passages and the different harmonic monitoring terminal.
Programmable amplifying circuit is used for analog current signal after the phase adjusted and analog voltage signal are carried out the ratio amplification.Can make measured signal that measuring accuracy preferably all arranged in relative broad range according to the measured signal actual size to its adjusting of carrying out optimum enlargement factor, have the characteristics of self-adaptation wide-range.
Active filter circuit is used for analog current signal after the program control amplification and analog voltage signal are carried out LPF, and the filtering high-frequency interferencing signal improves measuring accuracy.
Current potential translation circuit is used for filtered analog current signal of active filter circuit and analog voltage signal are carried out displacement, realizes the unipolarity input.In the present invention, mainly be with-2.5V～+ the 2.5V signal become 0V～+ the unipolarity input of 5V signal and A/D modular converter is complementary.
Among Fig. 2, the A/D modular converter is used for converting analog voltage signal and analog current signal into digital voltage signal and digital current signal respectively; Also be used to receive the synchronized sampling waveform form module output with sample waveform pulse per second (PPS) PPS signal Synchronization; And digital voltage signal and digital current signal are sampled, and will send to digital signal processing module through the digital voltage signal and the digital current signal of over-sampling according to said and sample waveform pulse per second (PPS) PPS signal Synchronization.Fig. 7 is that the A/D modular converter is connected synoptic diagram with digital signal processing module, and among Fig. 7, the A/D modular converter is selected 16 hyperchannel input high-speed a/d conversion chip ADS8365 for use, and inside has sampling hold circuit.The A/D modular converter converts analog quantity to digital quantity and is read from its internal register by digital signal processing module.The digital signal processing module chip is selected TMS320F2812.
Among Fig. 2; The synchronized sampling waveform forms module and is used to receive pulse per second (PPS) PPS signal; And under the control of digital signal processing module, the sample waveform of generation and pulse per second (PPS) PPS signal Synchronization, and sample waveform said to the output of A/D modular converter and pulse per second (PPS) PPS signal Synchronization.Fig. 8 is that the synchronized sampling waveform forms modular structure figure, and among Fig. 8, the synchronized sampling waveform forms module and is made up of GPS receiving element and CPLD (Complex Programmable Logic Device) complex programmable logic unit.CPLD is through the output of programming realization synchronized sampling waveform, and the GPS receiving element receives gps satellite signal through antenna, location back exportable high-precision pulse per second (PPS) (PPS) signal, and error is less than 1 μ s.Under the control of PPS triggering and digital signal processing module, the A/D modular converter is exported in CPLD output and the synchronous sample waveform of PPS, controls its sampling, realizes the synchronized sampling between the different harmonic wave synchronous monitoring terminal.
Among Fig. 2, digital signal processing module is used to control the sample waveform that the synchronized sampling waveform forms module generation and pulse per second (PPS) PPS signal Synchronization; Also be used to receive digital voltage signal and digital current signal, and store said digital voltage signal and digital current signal through over-sampling through over-sampling; Also be used to receive the input information of input/output module; Also be used for through input/output module output said digital voltage signal and digital current signal through over-sampling; Also be used for said digital voltage signal and digital current signal through over-sampling being sent to the harmonic monitoring central platform through communication system through communication module.
Among Fig. 2, communication module is used under the control of digital signal processing module, will be sent to communication system through the digital voltage signal and the digital current signal of over-sampling.The communication module expansion has JR45 interface, RS-232/485 serial ports and USB interface.Can select local area network communication or 485 bus mode communications according to the monitoring point actual conditions.If the monitoring point do not reserve communication interface, then USB interface extended wireless card of surfing Internet (wireless network card) can pass through in harmonic wave synchronous monitoring terminal, through communicating by letter of Wi-Fi, GPRS or the realization of cdma wireless network and harmonic monitoring central platform.
Come the extended network communication interface through high-speed hardware Ethernet protocol chips W 5100, circuit diagram is as shown in Figure 9.RJ45 adopts the RJ45 interface of 13F-60 series band network transformer.
The expansion of RS232/485 communication interface realizes through chip TL16C550 and MAX3160, and the GPIOA2 through DSP controls and selects RS232 or RS485.Circuit diagram is shown in figure 10.
The expansion of USB interface realizes that through the PDIUSBD12 chip circuit diagram is shown in figure 11.
Among Fig. 2, input/output module is used for to digital signal processing module input information being provided; Also be used under the control of digital signal processing module, exporting digital voltage signal and digital current signal through over-sampling.In order to reduce the volume at harmonic wave synchronous monitoring terminal, make it more portable, convenient, be fit to the needs of flexible networking, simplify display, the keyboard of expansion.Keyboard is established 5 function buttons (move left and right of cursor, the plus-minus of data is confirmed key), can import necessary information and get final product.Display is 3 cun LCD displays.
In addition, the memory function of digital signal processing module of the present invention realizes through GPIOA4 and the GPIOA5 pin expansion AT 24C512 of DSP.Digital signal processing module can be stored tested voltage transformer (VT) no-load voltage ratio, current transformer ratio, device numbering etc.; Can also be used to store tasks information, like information such as measuring task zero hour, the finish times, if the terminal powering-off state takes place, the readable information of going out on missions in back that powers on continues to carry out in the task implementation.Circuit diagram is shown in figure 12.
Among Fig. 1, communication system includes spider lines and/or wireless network; Said cable network adopts Ethernet or string line network; Said wireless network adopts 3G, Wi-Fi, GPRS or cdma network.If monitored electrical network condition permission, first-selected Ethernet (particularly LAN) communication inserts the electric system LAN with harmonic monitoring central platform and each harmonic wave synchronous monitoring terminal through netting twine, communicates.If monitoring range is less, can realize networking through the RS-485 bus, realize the communication at harmonic monitoring central platform harmonic synchronous monitoring terminal.If monitored electrical network is not reserved any communication interface, then USB interface extended wireless card of surfing Internet all can be passed through in harmonic monitoring central platform harmonic synchronous monitoring terminal, realizes communication through GPRS (or CDMA) wireless network.In a word, can select communication mode flexibly according to on-site actual situations.
The harmonic monitoring central platform comprises harmonic wave synchronous monitoring terminal management center, data processing centre (DPC) and data storage center, is responsible for coordinating working between each ingredient of harmonic wave synchronous monitoring system.Figure 13 is a harmonic monitoring central platform workflow diagram, and its main task comprises:
1. dynamically set up tested power network topology model.
Because the detected object based on the harmonic wave synchronous monitoring system of flexible thought is unfixed, therefore, draws tested electrical network main wiring diagram easily, it is particularly important to generate tested topological structure of electric model automatically.The tested electrical network automatic modeling program based on graphic platform can be realized in harmonic wave synchronous monitoring terminal management center.
2. harmonic wave synchronous monitoring terminal optimizes distribution.
When the big and harmonic wave synchronous monitoring terminal number of the monitored scale of power of needs more after a little while; Distributing rationally of the installation site at harmonic wave synchronous monitoring terminal is particularly important; The terminal optimized place function of harmonic wave synchronous monitoring can be realized in harmonic wave synchronous monitoring terminal management center, to guarantee the allocation optimum at harmonic wave synchronous monitoring terminal.
3. to the remote monitoring and the control at harmonic wave synchronous monitoring terminal.
Issue detection task and real-time monitoring terminal duty can for all harmonic wave synchronous monitoring terminals through harmonic wave synchronous monitoring terminal management center, greatly improve the convenience and the reliability of system.
4. to reception, analytical calculation and the storage of harmonic wave synchronous monitoring terminal data.
Data processing centre (DPC) can adopt multiple communication mode (wired ethernet, wireless ethernet, GPRS, serial ports etc.) to receive the data with synchronous time mark that monitoring terminal transmits.Data processing centre (DPC) also does computational analysis to receiving data; Like the harmonic parameters of resultant distortion rate, mains by harmonics state and the electric network element of the resultant distortion rate of the containing ratio of the phase place of the amplitude of the containing ratio of the phase place of the amplitude of each time voltage harmonic, each time voltage harmonic, each time voltage harmonic, each primary current harmonic wave, each primary current harmonic wave, each primary current harmonic wave, voltage, electric current, the data storage after will handling at last is to data storage center.
5. the information excavating of data and output
Data storage center provides the data-interface of standard; External application can be through standard data-interface visit original sampling data, data and preface decomposed data behind the FFT and carry out other ADVANCED APPLICATIONS, like tested electrical network system Harmonic characteristic analysis, tested mains by harmonics state estimation value etc.Data storage center can also upload to measurement data on the tested power network topology figure and show that problem analysis is more directly perceived.
Figure 14 is a harmonic wave synchronous monitoring terminal works process flow diagram.Under the control of harmonic monitoring central platform, harmonic wave synchronous monitoring terminal works process is shown in figure 14.
The above; Be merely the preferable embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technician who is familiar with the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claim.
Claims (9)
1. The Wide Area Power harmonic wave synchronous monitoring system flexibly is characterized in that said harmonic wave synchronous monitoring system comprises harmonic wave synchronous monitoring terminal, the communication system harmonic monitoring center platform that order links to each other;
Said harmonic wave synchronous monitoring terminal is used to receive the monitoring task that the harmonic monitoring central platform sends, and carries out the synchro measure of mains by harmonics according to the monitoring task, then with the synchro measure result through communication system transmits to the harmonic monitoring central platform;
Communication system is used to transmit the monitoring task that the harmonic monitoring central platform sends, and also is used to transmit the synchro measure result at each harmonic wave synchronous monitoring terminal;
Said harmonic monitoring central platform is used for confirming the installation site at each harmonic wave synchronous monitoring terminal, and the process communication system is to each harmonic wave synchronous monitoring terminal transmitting supervisory task; Also be used to receive the synchro measure result at each harmonic wave synchronous monitoring terminal, and the synchro measure result who receives is handled and exports.
2. a kind of harmonic wave of The Wide Area Power flexibly synchronous monitoring according to claim 1 system; It is characterized in that said harmonic wave synchronous monitoring terminal comprises picking up signal module, forward path module, A/D modular converter and digital signal processing module that order links to each other; Comprise that also the synchronized sampling waveform that links to each other with digital signal processing module with said A/D modular converter forms module, also comprises the communication module and the input/output module that link to each other with digital signal processing module;
Said picking up signal module is used to pick up analog voltage signal and analog current signal, and analog voltage signal and analog current signal are sent to the forward path module;
Said forward path module is used for analog voltage signal and analog current signal are handled, so that analog voltage signal and analog current signal convert digital voltage signal and digital current signal respectively into;
Said A/D modular converter is used for converting analog voltage signal and analog current signal into digital voltage signal and digital current signal respectively; Also be used to receive the synchronized sampling waveform form module output with sample waveform pulse per second (PPS) PPS signal Synchronization; And digital voltage signal and digital current signal are sampled, and will send to digital signal processing module through the digital voltage signal and the digital current signal of over-sampling according to said and sample waveform pulse per second (PPS) PPS signal Synchronization;
Said synchronized sampling waveform forms module and is used to receive pulse per second (PPS) PPS signal; And under the control of digital signal processing module; The sample waveform of generation and pulse per second (PPS) PPS signal Synchronization, and sample waveform said to the output of A/D modular converter and pulse per second (PPS) PPS signal Synchronization;
Said digital signal processing module is used to control the sample waveform that the synchronized sampling waveform forms module generation and pulse per second (PPS) PPS signal Synchronization; Also be used to receive digital voltage signal and digital current signal, and store said digital voltage signal and digital current signal through over-sampling through over-sampling; Also be used to receive the input information of input/output module; Also be used for through input/output module output said digital voltage signal and digital current signal through over-sampling; Also be used for said digital voltage signal and digital current signal through over-sampling being sent to the harmonic monitoring central platform through communication system through communication module;
Said communication module is used under the control of digital signal processing module, will be sent to communication system through the digital voltage signal and the digital current signal of over-sampling;
Said input/output module is used for to digital signal processing module input information being provided; Also be used under the control of digital signal processing module, exporting digital voltage signal and digital current signal through over-sampling.
3. a kind of harmonic wave of The Wide Area Power flexibly synchronous monitoring according to claim 2 system is characterized in that said picking up signal module comprises analog current signal pick-up and analog voltage signal pick-up.
4. a kind of harmonic wave of The Wide Area Power flexibly synchronous monitoring according to claim 2 system is characterized in that said forward path module comprises buffer circuit, amplifying circuit, phase regulating circuit, programmable amplifying circuit, active filter circuit and current potential translation circuit that order links to each other;
Said buffer circuit is used to realize the isolation between the circuit board at the analog current signal that picks up and analog voltage signal and harmonic wave synchronous monitoring terminal, avoids producing electrical Interference;
Said amplifying circuit is used to amplify analog current signal and the analog voltage signal that picks up;
Said phase regulating circuit is used to improve through the analog current signal of amplifying circuit amplification and the angular accuracy mutually of analog voltage signal;
Said programmable amplifying circuit is used for analog current signal after the phase adjusted and analog voltage signal are carried out the ratio amplification;
Said active filter circuit is used for analog current signal after the program control amplification and analog voltage signal being carried out LPF, the filtering high-frequency interferencing signal;
Said current potential translation circuit is used for filtered analog current signal of active filter circuit and analog voltage signal are carried out displacement, realizes the unipolarity input.
5. a kind of harmonic wave of The Wide Area Power flexibly synchronous monitoring according to claim 2 system is characterized in that said synchronized sampling waveform forms module and is made up of GPS receiving element and complex programmable logic unit; Said GPS receiving element is used to receive gps signal, and according to the gps signal output pulse per second (PPS) PPS signal that receives; The sample waveform with pulse per second (PPS) PPS signal Synchronization is exported in said complex programmable logic unit under pulse per second (PPS) PPS signal and digital signal processing module control.
6. a kind of harmonic wave of The Wide Area Power flexibly synchronous monitoring according to claim 2 system is characterized in that said communication module comprises JR45 interface, RS-232/485 serial ports and USB interface.
7. a kind of harmonic wave of The Wide Area Power flexibly synchronous monitoring according to claim 2 system is characterized in that said input/output module comprises keyboard and display.
8. according to the described a kind of harmonic wave of the The Wide Area Power flexibly synchronous monitoring of any claim among claim 1-7 system, it is characterized in that said communication system includes spider lines and/or wireless network; Said cable network adopts Ethernet or string line network; Said wireless network adopts 3G, Wi-Fi, GPRS or cdma network.
9. according to the described a kind of harmonic wave of the The Wide Area Power flexibly synchronous monitoring of any claim among claim 1-7 system, it is characterized in that said harmonic monitoring central platform comprises harmonic wave synchronous monitoring terminal management center, data processing centre (DPC) and data storage center;
Said harmonic wave synchronous monitoring terminal management center is used to draw the topological structure of tested electrical network, and confirms the installation site at each harmonic wave synchronous monitoring terminal according to the topological structure of tested electrical network; Also be used for simultaneously through communication system to each harmonic wave synchronous monitoring terminal transmitting supervisory task;
Said data processing centre (DPC) is used to receive the synchro measure result at each harmonic wave synchronous monitoring terminal; And the synchro measure result handled, obtain the harmonic parameters of resultant distortion rate, mains by harmonics state and electric network element of resultant distortion rate, the electric current of containing ratio, the voltage of phase place, each primary current harmonic wave of amplitude, each primary current harmonic wave of containing ratio, each primary current harmonic wave of phase place, each time voltage harmonic of amplitude, each time voltage harmonic of each time voltage harmonic;
Said data storage center be used to store the synchro measure result at each harmonic wave synchronous monitoring terminal and the synchro measure result handled after data.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203074117U CN202196121U (en) | 2011-08-23 | 2011-08-23 | Flexible and synchronous harmonic monitoring system of wide-area power grid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203074117U CN202196121U (en) | 2011-08-23 | 2011-08-23 | Flexible and synchronous harmonic monitoring system of wide-area power grid |
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| CN202196121U true CN202196121U (en) | 2012-04-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323478A (en) * | 2011-08-23 | 2012-01-18 | 华北电力大学（保定） | Flexible wide area power grid harmonic synchronous monitoring system |
| CN108490257A (en) * | 2018-03-26 | 2018-09-04 | 华北电力大学 | A kind of short time-window inter-harmonic wave measuring method based on spectrum curve fitting |
-
2011
- 2011-08-23 CN CN2011203074117U patent/CN202196121U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323478A (en) * | 2011-08-23 | 2012-01-18 | 华北电力大学（保定） | Flexible wide area power grid harmonic synchronous monitoring system |
| CN108490257A (en) * | 2018-03-26 | 2018-09-04 | 华北电力大学 | A kind of short time-window inter-harmonic wave measuring method based on spectrum curve fitting |
| CN108490257B (en) * | 2018-03-26 | 2020-08-21 | 华北电力大学 | Short-time window inter-harmonic measurement method based on spectral curve fitting |
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