CN104090187A - Ring main unit electrical capacity collecting and fault recording device - Google Patents
Ring main unit electrical capacity collecting and fault recording device Download PDFInfo
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- CN104090187A CN104090187A CN201410336974.7A CN201410336974A CN104090187A CN 104090187 A CN104090187 A CN 104090187A CN 201410336974 A CN201410336974 A CN 201410336974A CN 104090187 A CN104090187 A CN 104090187A
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Abstract
The invention discloses a ring main unit electrical capacity collecting and fault recording device which comprises a signal conditioning circuit, an analog-digital conversion sampling module, a microprocessor and an electric parameter sampling module. The analog-digital conversion sampling module collects electric signals output by the signal conditioning circuit in real time and outputs the electric signals to the microprocessor for fault recording and fault logging after analog-digital conversion; the electric parameter sampling module collects the electric signals output by the signal conditioning circuit in real time, and electrical capacity parameters are obtained according to the electric signals. Due to the fact that the electric signals output by the signal conditioning circuit can be transmitted to the analog-digital conversion sampling module and the electric parameter sampling module respectively through two channels, electrical capacity collecting and fault logging can be achieved. It is observed that the ring main unit electrical capacity collecting and fault recording device has an electrical capacity collecting function and a fault logging function at the same time, so that the space occupied by the device in a ring main unit is reduced, and the operation process is further simplified.
Description
Technical field
The present invention relates to ring main unit on-line monitoring technique field, in particular, relate to the collection of a kind of ring main unit electric parameters and failure recording device.
Background technology
Ring main unit is that one group of high-tension switch gear is contained in metal or nonmetal insulation cabinet, or make the electrical equipment of assembled compartment ring network power supply unit, because of its have simple in structure, volume is little, price is low, can improve the advantages such as power supply parameter, so be widely used in the distribution substation and box-type substation of the load centers such as Urban Residential District, skyscraper, large public building, factory and enterprise.
For ensureing security, the reliability of ring main unit power supply, just need to carry out on-line monitoring to ring main unit.At present, although the research for ring main unit on-line monitoring is comparatively extensive, but most devices have been only the Real-time Collections to ring main unit electric parameters parameter, in the time that ring main unit is carried out to failure logging, just need to adopt special failure recording device, thereby not only increase equipment taking up room in ring main unit, also increased the troublesome operation of observation process.How therefore a kind of device that simultaneously possesses the collection of ring main unit electric parameters and failure logging be provided is those skilled in the art's technical matterss urgently to be resolved hurrily.
Summary of the invention
In view of this, the invention provides the collection of a kind of ring main unit electric parameters and failure recording device, possess electric parameters collection and fault logging function to realize same device simultaneously.
A kind of ring main unit electric parameters gathers and failure recording device, comprising:
Input end is electrically connected with each mutual inductor in ring main unit respectively, for receiving the electric signal of each mutual inductor output, and the ac voltage signal in described electric signal is converted to the signal conditioning circuit of unidirectional sinusoidal signal;
Input end is electrically connected with the first output terminal of described signal conditioning circuit, for the electric signal of signal conditioning circuit output described in Real-time Collection, and described electric signal is carried out to analog-to-digital analog to digital conversion sampling module;
First input end is electrically connected with the output terminal of described analog to digital conversion sampling module, for obtaining the electric signal after the analog to digital conversion of described analog to digital conversion sampling module output, and utilize electric signal after described analog to digital conversion to carry out the microprocessor of failure wave-recording and failure logging;
Input end is electrically connected with the second output terminal of described signal conditioning circuit, output terminal is electrically connected with the second input end of described microprocessor, for the electric signal of signal conditioning circuit output described in Real-time Collection, and obtain the Electric Parameters Sampling module of the electric parameters parameter of described ring main unit according to this electric signal.
Preferably, described analog to digital conversion sampling module is that model is the analog-digital chip of MAX1320.
Preferably, described Electric Parameters Sampling module is that model is the three-phase electrical energy computation chip of ATT7022.
Preferably, also comprise:
Be electrically connected with described microprocessor, for storing the data memory module of fault recorder data, fault record data and described electric parameters parameter of described microprocessor output.
Preferably, described data memory module is that model is the ferroelectric memory of FM24V02.
Preferably, described data memory module has high speed 12C interface.
Preferably, also comprise:
Be electrically connected with described microprocessor, there is number communication module of equipment cascading interface in transmission interface and a ring main unit factually time.
Preferably, also comprise:
The touch screen controller being electrically connected with described microprocessor.
Preferably, described touch screen controller comprises: display circuit and key circuit, described display circuit and the electrical connection of described key circuit.
Preferably, in described analog to digital conversion sampling module, be provided with synchronized sampling ADC amplifier.
Can find out from above-mentioned technical scheme, the invention provides the collection of a kind of ring main unit electric parameters and failure recording device, the electric signal of analog to digital conversion sampling module Real-time Collection signal conditioning circuit output, and carry out exporting microprocessor to after analog to digital conversion and carry out failure wave-recording and failure logging; The electric signal of Electric Parameters Sampling module Real-time Collection signal conditioning circuit output, and obtain electric parameters parameter according to this electric signal.Because the electric signal of signal conditioning circuit output can be sent into respectively analog to digital conversion sampling module and Electric Parameters Sampling module by binary channels, therefore to realize respectively electric parameters collection and failure logging.Can find out, ring main unit electric parameters provided by the invention collection and failure recording device possess electric parameters collection and fault logging function simultaneously, thereby have not only reduced device taking up room in ring main unit, but also have simplified operating process.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 is the embodiment of the present invention disclosed a kind of ring main unit electric parameters collection and failure recording device;
Fig. 2 is the embodiment of the present invention disclosed another kind of ring main unit electric parameters collection and failure recording device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses the collection of a kind of ring main unit electric parameters and failure recording device, possess electric parameters collection and fault logging function to realize same device simultaneously.
Referring to Fig. 1, the structural representation of the disclosed a kind of ring main unit electric parameters collection of the embodiment of the present invention and failure recording device, comprising: signal conditioning circuit 11, analog to digital conversion sampling module 12, microprocessor 13 and Electric Parameters Sampling module 14;
Wherein:
The input end of signal conditioning circuit 11 is electrically connected with each mutual inductor in ring main unit, for receiving the electric signal of each mutual inductor output, and the ac voltage signal in described electric signal is converted to unidirectional sinusoidal signal.
Wherein, mutual inductor comprises voltage transformer (VT) (Potential Transformer, PT) summation current transformer (Current Trensformer, CT).
Concrete, the three-phase voltage of power network monitoring point, residual voltage totally 4 tunnel original signals, first convert low-voltage AC signal (for example, ± 5V) to by 4 groups of PT, and then be converted to unidirectional sinusoidal signal (for example, 0～5V) by signal conditioning circuit 11.
The three-phase current of power network monitoring point, zero-sequence current totally 4 tunnel original signals, convert low current AC signal to by 4 groups of CT, then exports signal conditioning circuit 11 to.
It should be noted that, signal conditioning circuit 11 not only can be converted to bipolar voltage signal required signal, can also realize the isolation transmission of input signal, and switching circuit disturbs and effectively solves and disturb.
The input end of analog to digital conversion sampling module 12 is electrically connected with the first output terminal of signal conditioning circuit 11, the electric signal of exporting for Real-time Collection signal conditioning circuit 11, and described electric signal is carried out to analog to digital conversion.
The first input end of microprocessor 13 is electrically connected with the output terminal of analog to digital conversion sampling module 12, for obtaining the electric signal after the analog to digital conversion that analog to digital conversion sampling module 12 exports, and utilize the electric signal after described analog to digital conversion to carry out failure wave-recording and failure logging.
Concrete, microprocessor 13 is according to the predefined computation period of catching, obtain in twice break period interval by twice interruption, electric signal after the analog to digital conversion that analog to digital conversion sampling module 12 is exported, after this electric signal is analyzed, is processed, judge principle according to fault, obtain fault judged result, and the real-time waveform in record trouble moment, realize fault logging function.
The input end of Electric Parameters Sampling module 14 is electrically connected with the second output terminal of signal conditioning circuit 11, the output terminal of Electric Parameters Sampling module 14 is electrically connected with the second input end of microprocessor 13, the electric signal that Electric Parameters Sampling module 14 is exported for Real-time Collection signal conditioning circuit 11, and obtain the electric parameters parameter of ring main unit according to this electric signal.
Wherein, Electric Parameters Sampling module 14 can be measured each phase and close the active power of phase, reactive power, applied power, active energy etc., and Electric Parameters Sampling module 14 can also be measured the electric parameters parameters such as the current effective value, voltage effective value, power factor, phase angle, frequency of each phase.
In summary it can be seen, the electric signal that analog to digital conversion sampling module 12 Real-time Collection signal conditioning circuits 11 are exported, and carry out exporting microprocessor 13 to after analog to digital conversion and carry out failure wave-recording and failure logging; The electric signal that Electric Parameters Sampling module 14 Real-time Collection signal conditioning circuits 11 are exported, and obtain electric parameters parameter according to this electric signal.Because the electric signal that signal conditioning circuit 11 is exported can be sent into respectively analog to digital conversion sampling module 12 and Electric Parameters Sampling module 14 by binary channels, therefore to realize respectively electric parameters collection and failure logging.So ring main unit electric parameters provided by the invention collection and failure recording device possess electric parameters collection and fault logging function simultaneously, thereby not only reduce device taking up room in ring main unit, but also simplified operating process.
It should be noted that, in microprocessor 13, be loaded with fault detection program, can be to the voltage of Real-time Obtaining, electric current on-line analysis, and judge in time electric network fault, failure message is provided.
Preferably, it is the arm processor of LPC2136 that microprocessor 13 adopts model, and this arm processor has high-performance sampling dominant frequency 60MHZ.
Preferably, to adopt model be the analog-digital chip of MAX1320 to analog to digital conversion sampling module 12.
MAX1320 analog-digital chip is 14 analog-digital chips, this chip is by synchronized sampling retainer, multi-way switch and high-speed ADC (Analog Digital Converter, analog to digital conversion) chip is integrated in one, and has that analog-to-digital conversion rate is fast, precision is high, easy to use, interface is simple, economical and practical, the reliable advantage of working stability.MAX1320 analog-digital chip has 8 synchronized sampling ADC amplifier inputs, the analog-to-digital time of each passage is 1.6 μ s, be 3.7 μ s the switching time of 8 passages, and sample rate reaches 250Ksps in the time of 8 passage, thereby can meet the required accuracy requirement of fault algorithms.
Preferably, it is the three-phase electrical energy computation chip of ATT7022 that Electric Parameters Sampling module 14 adopts model, ATT7022 three-phase electrical energy computation chip can be measured each phase and close the active power of phase, reactive power, applied power, active energy etc., can also measure the electric parameters parameters such as the current effective value, voltage effective value, power factor, phase angle, frequency of each phase.
It should be noted is that, in the time carrying out fault algorithms, need analog to digital conversion sampling module 12 that real-time voltage, the real-time current sampled data that precision is higher is provided, and Electric Parameters Sampling module 14 required sampled data precision in the time carrying out electric parameters calculation of parameter is relatively low, thereby process signal conditioning circuit 11 8 road input signals after treatment must export respectively analog to digital conversion sampling module 12 to by binary channels, Electric Parameters Sampling module 14 is sampled, due to the accuracy requirement difference of two sample circuits to sampled data, thereby adopt different sample frequency.
Referring to Fig. 2, the structural representation of the disclosed a kind of ring main unit electric parameters collection of another embodiment of the present invention and failure recording device, in conjunction with Fig. 1 and Fig. 2, the collection of ring main unit electric parameters and failure recording device also comprise: data memory module 15;
Data memory module 15 is electrically connected with microprocessor 13, fault recorder data, fault record data and the electric parameters parameter exported for storage microprocessor 13.
Wherein, to adopt model be the ferroelectric memory of FM24V02 to data memory module 15.
Data memory module 15 has high speed 12C interface, without erasable number of times restriction, can complete this locality storage of the electric parameters parameter that microprocessor 13 is exported; In the time that electrical network breaks down, can also complete the storage to fault recorder data, fault record data.
For further optimizing above-described embodiment, also comprise: touch screen controller 16;
Touch screen controller 16 is electrically connected with microprocessor 13.
Wherein, touch screen controller 16 comprises display circuit and the key circuit of electrical connection, and display circuit can show fault recorder data, fault record data and electric parameters parameter in real time; Key circuit can be realized button operation.
For further optimizing above-described embodiment, also comprise: communication module 17;
Communication module 17 is electrically connected with microprocessor 13, and communication module 17 has number equipment cascading interface in transmission interface and a ring main unit factually time, and two interfaces all adopt MODBUS agreement, can realize client functionality in C/S structure.
In summary it can be seen, the electric signal that analog to digital conversion sampling module 12 Real-time Collection signal conditioning circuits 11 are exported, and carry out exporting microprocessor 13 to after analog to digital conversion and carry out failure wave-recording and failure logging; The electric signal that Electric Parameters Sampling module 14 Real-time Collection signal conditioning circuits 11 are exported, and obtain electric parameters parameter according to this electric signal.Because the electric signal that signal conditioning circuit 11 is exported can be sent into respectively analog to digital conversion sampling module 12 and Electric Parameters Sampling module 14 by binary channels, therefore to realize respectively electric parameters collection and failure logging.So ring main unit electric parameters provided by the invention collection and failure recording device possess electric parameters collection and fault logging function simultaneously, thereby not only reduce device taking up room in ring main unit, but also simplified operating process.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. ring main unit electric parameters gathers and a failure recording device, it is characterized in that, comprising:
Input end is electrically connected with each mutual inductor in ring main unit respectively, for receiving the electric signal of each mutual inductor output, and the ac voltage signal in described electric signal is converted to the signal conditioning circuit of unidirectional sinusoidal signal;
Input end is electrically connected with the first output terminal of described signal conditioning circuit, for the electric signal of signal conditioning circuit output described in Real-time Collection, and described electric signal is carried out to analog-to-digital analog to digital conversion sampling module;
First input end is electrically connected with the output terminal of described analog to digital conversion sampling module, for obtaining the electric signal after the analog to digital conversion of described analog to digital conversion sampling module output, and utilize electric signal after described analog to digital conversion to carry out the microprocessor of failure wave-recording and failure logging;
Input end is electrically connected with the second output terminal of described signal conditioning circuit, output terminal is electrically connected with the second input end of described microprocessor, for the electric signal of signal conditioning circuit output described in Real-time Collection, and obtain the Electric Parameters Sampling module of the electric parameters parameter of described ring main unit according to this electric signal.
2. ring main unit electric parameters according to claim 1 gathers and failure recording device, it is characterized in that, described analog to digital conversion sampling module is that model is the analog-digital chip of MAX1320.
3. ring main unit electric parameters according to claim 1 gathers and failure recording device, it is characterized in that, described Electric Parameters Sampling module is that model is the three-phase electrical energy computation chip of ATT7022.
4. ring main unit electric parameters according to claim 1 gathers and failure recording device, it is characterized in that, also comprises:
Be electrically connected with described microprocessor, for storing the data memory module of fault recorder data, fault record data and described electric parameters parameter of described microprocessor output.
5. ring main unit electric parameters according to claim 4 gathers and failure recording device, it is characterized in that, described data memory module is that model is the ferroelectric memory of FM24V02.
6. ring main unit electric parameters according to claim 4 gathers and failure recording device, it is characterized in that, described data memory module has high speed 12C interface.
7. ring main unit electric parameters according to claim 1 gathers and failure recording device, it is characterized in that, also comprises:
Be electrically connected with described microprocessor, there is number communication module of equipment cascading interface in transmission interface and a ring main unit factually time.
8. ring main unit electric parameters according to claim 1 gathers and failure recording device, it is characterized in that, also comprises:
The touch screen controller being electrically connected with described microprocessor.
9. ring main unit electric parameters according to claim 8 gathers and failure recording device, it is characterized in that, described touch screen controller comprises: display circuit and key circuit, described display circuit and the electrical connection of described key circuit.
10. ring main unit electric parameters according to claim 1 gathers and failure recording device, it is characterized in that, is provided with synchronized sampling ADC amplifier in described analog to digital conversion sampling module.
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| CN201410336974.7A CN104090187A (en) | 2014-07-15 | 2014-07-15 | Ring main unit electrical capacity collecting and fault recording device |
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| CN201410336974.7A CN104090187A (en) | 2014-07-15 | 2014-07-15 | Ring main unit electrical capacity collecting and fault recording device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109696902A (en) * | 2018-12-06 | 2019-04-30 | 奇瑞汽车股份有限公司 | A kind of signal recording apparatus, fault point detection circuit and method |
| CN110244153A (en) * | 2019-07-16 | 2019-09-17 | 国网湖南省电力有限公司 | A kind of Internet of Things type low-voltage equipment monitoring terminal |
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| CN202614876U (en) * | 2012-06-05 | 2012-12-19 | 国电南瑞科技股份有限公司 | Integrated device of electric energy quality monitoring and fault recording |
| CN103197184A (en) * | 2013-04-03 | 2013-07-10 | 河海大学 | Fault wave recording device with impact load considered |
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Patent Citations (3)
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| CN101334439A (en) * | 2008-07-08 | 2008-12-31 | 国电南瑞科技股份有限公司 | Electric network data integrated collection method and apparatus |
| CN202614876U (en) * | 2012-06-05 | 2012-12-19 | 国电南瑞科技股份有限公司 | Integrated device of electric energy quality monitoring and fault recording |
| CN103197184A (en) * | 2013-04-03 | 2013-07-10 | 河海大学 | Fault wave recording device with impact load considered |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109696902A (en) * | 2018-12-06 | 2019-04-30 | 奇瑞汽车股份有限公司 | A kind of signal recording apparatus, fault point detection circuit and method |
| CN110244153A (en) * | 2019-07-16 | 2019-09-17 | 国网湖南省电力有限公司 | A kind of Internet of Things type low-voltage equipment monitoring terminal |
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