CN107607764A - A kind of multichannel capacitance type potential transformer real-time detection method and device - Google Patents

A kind of multichannel capacitance type potential transformer real-time detection method and device Download PDF

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Publication number
CN107607764A
CN107607764A CN201710350512.4A CN201710350512A CN107607764A CN 107607764 A CN107607764 A CN 107607764A CN 201710350512 A CN201710350512 A CN 201710350512A CN 107607764 A CN107607764 A CN 107607764A
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signal
capacitance type
potential transformer
type potential
detection
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CN201710350512.4A
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CN107607764B (en
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唐琪
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Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Abstract

The present disclosure provides a kind of multichannel capacitance type potential transformer equipment real-time detection method and device, this method is included by handling the voltage detection signal of capacitance type potential transformer, then transmitted by WiFi equipment to background terminal, background terminal is by the way that the data after processing and reference data are compared, show whether current each road capacitance type potential transformer equipment is in the information of normal condition, and feed back to staff.The equipment includes capacitance type potential transformer, exchange power conversion circuit, STM32 chips, data storage, power supply, transmission equipment and background terminal.The invention solves the problems, such as to be unable to real-time multichannel detection device state for existing capacitance type potential transformer monitoring device, and the problem of the high voltage defect of capacitance type potential transformer can not be found.Allow staff to recognize the working condition and high voltage defect of multichannel capacitance type potential transformer equipment in real time, ensure the safety of electric power system.

Description

A kind of multichannel capacitance type potential transformer real-time detection method and device
Technical field
The present invention relates to electrical equipment detection field, more particularly, to a kind of side of capacitance type potential transformer detection Method and device.
Background technology
Capacitance type potential transformer is widely used in power system, and it mainly acts on detection power bus-bar and circuit Voltage condition.Because it has small impact strength, small volume, in light weight, and can reliably damps ferromagnetic humorous in actual applications Shake and possess the advantages of excellent transient response characteristic, gradually substitute electromagnetic potential transformer, be that one kind must can not in power network Few equipment.
Capacitance type potential transformer obtains the voltage of bus or circuit by way of capacitance partial pressure, then passes through electricity Bus or line voltage distribution are depressured to maximum 100V/57.7V secondary side by magnetic transformer.Then again by systems such as scheduling and relay protections To obtain this voltage, then the anti-virtual voltage for releasing bus or circuit.
During actual motion, the voltage that the system such as scheduling and relay protection obtains from capacitance type potential transformer is only used for detection mother The running situation of line or circuit, the situation of capacitance type potential transformer equipment in itself is not relevant for.If capacitor voltage is mutual There is failure in sensor, gently can then cause voltage detecting to occur abnormal, cause scheduling and relay protection system erroneous judgement, can occur when serious Blast, causes serious consequence.
Currently, the method for ensureing capacitance type potential transformer health operation is by periodically having a power failure come to capacitive battery Pressure transformer does preventive trial, judges whether capacitance type potential transformer is good from result of the test.But this method has Following defect:
1st, periodically have a power failure experiment, can cause the waste of electric energy and human resources.
2nd, multiple capacitance type potential transformers can not be detected simultaneously when testing by having a power failure, and can only be detected for one of them.
3rd, during power failure experiment, to capacitance type potential transformer institute making alive typically than relatively low, about below 10KV, and condenser type Its making alive is generally tens of or hundreds of kilovolts when voltage transformer is run.So the experiment that has a power failure does not guarantee to find high electricity The defects of depressing capacitance type potential transformer.
The content of the invention
Instant invention overcomes the technical deficiency of above-mentioned existing capacitance type potential transformer detection, there is provided a kind of new more Road real-time detection method and device, can effectively solve the problems, such as that capacitance type potential transformer periodically has a power failure and test, can be simultaneously Several capacitance type potential transformers are detected, the running without influenceing power network.It is electric under high-voltage case at the same time it can also find The defects of appearance formula voltage transformer, the equipment safety of capacitance type potential transformer is ensured.
In order to solve the above technical problems, technical scheme is as follows:
A kind of multichannel capacitance type potential transformer real-time detection apparatus, if the detection means is sent out including main line voltage acquisition Module and background terminal are sent, every voltage acquisition sending module all the way company of foundation by way of radio communication all with background terminal Connect;The capacitance type potential transformer for including being connected with each other per voltage acquisition sending module all the way, exchange power conversion circuit, micro- Processor, power supply, data storage and transmission equipment;Exchange power conversion circuit is connected with capacitance type potential transformer;Alternating current Change-over circuit is also connected with microprocessor;Microprocessor is also connected with transmission equipment;Microprocessor is also connected with data storage; Power supply is connected with microprocessor;Power supply is also connected with transmission equipment.
In a kind of preferable scheme, described microprocessor is dominant frequency 72MHz enhanced STM32 chips, and sampling is frequently Rate is set as 100KHz.Microprocessor is responsible for carrying out signal to the detection voltage of the capacitance type potential transformer by being depressured processing Processing, including the transmission conversion of analog-to-digital conversion, high-speed sampling, data comparison, parallel/serial row.
In a kind of preferable scheme, described transmission equipment is WiFi transmission equipments.WiFi transmission equipments will be per all the way The signal that voltage acquisition sending module obtains is sent to background terminal.
In a kind of preferable scheme, described exchange power conversion circuit is the partial pressure that miniature transformer or resistance form Circuit.The detection voltage of capacitance type potential transformer is depressured by exchange power conversion circuit, meets the parameter of STM32 chips It is required that.
In a kind of preferable scheme, described background terminal is integral type Integrated Processing Unit, the integrated apparatus work( Reception signal, signal transacting can be included, human-computer interaction interface is provided.
In a kind of preferable scheme, described data storage is NOR Flash.
A kind of real-time detection method of multichannel capacitance type potential transformer assembly detection apparatus, comprises the following steps:
Step A:In per voltage acquisition sending module all the way, exchange power conversion circuit gathers to capacitance type potential transformer Real-time voltage be depressured, obtain analog signal;
Step B:Microprocessor is AD converted to the obtained analog signals of step A, obtains data signal;
Step C:Whether the data signal that judgment step B is obtained has mutation, if the jump signal is then stored in by mutation Abnormal data memory;
Step D:The data signal obtained to step B carries out signal transacting;
Step E:The signal that jump signal and step D in step C obtain passes through parallel/serial transmission modular converter serial transmission To transmission equipment, background terminal is then transferred to by transmission equipment;
Step F:Background terminal carries out secondary contrast processing to transmitting the signal come per voltage acquisition sending module all the way;
Step G:Comparing result is fed back into staff.
In a kind of preferable scheme, the step D specifically comprises the following steps:
When the signal that step B is obtained is normal, the signal progress cycle is averaged, each cycle is one minute, is then exported Average data;When the signal that step B is obtained has mutation, jump signal is recorded, and be averaged instead of one minute with jump signal Data, then output mutation signal.
In a kind of preferable scheme, the step F is specific as follows:
Step 1:Background terminal according to voltage acquisition sending module transmit come signal number, divide the logic of same number Unit;
Step 2:Background terminal finds out the jump signal in the signal that the transmission of voltage acquisition sending module comes, and is patrolled accordingly Collect and mark capacitance type potential transformer problematic in unit;
Step 3:Background terminal does not have the data addition calculation average value of jump signal to each road, and the average value is stored in Into each logic unit in addition to the logic unit marked except step 2, while corresponding voltage acquisition sending module is obtained The data arrived are stored in respective logic unit, then by respective data compared with average value, and draw deviation;
Step 4:By deviation compared with the variance thresholds of the corresponding voltage class set, if beyond threshold values Quote the abnormal information of capacitance type potential transformer.
Compared with prior art, the beneficial effect of technical solution of the present invention is:The present invention provides one kind on multichannel electric capacity The detection method and device of formula voltage transformer, method are included by being carried out to the voltage detection signal of capacitance type potential transformer Decompression, analog-to-digital conversion, sample at a high speed, parallel/serial converting transmission.Then transmitted by WiFi to background terminal, background terminal By to each road voltage acquisition sending module transmit come signal compare, providing each capacitance type potential transformer equipment is The no information in normal condition, and feed back to staff.The equipment includes capacitance type potential transformer, alternating current conversion electricity Road, STM32 chips, data storage, power supply, transmission equipment and background terminal.Instant invention overcomes existing capacitor voltage The technical deficiency of transformer detection, there is provided a kind of new detection method and corollary apparatus, it is mutual effectively to solve capacitor voltage The problem of sensor periodicity power failure experiment, multichannel capacitance type potential transformer can be detected at any time, the running without influenceing power network. The defects of at the same time it can also find the capacitance type potential transformer under high-voltage case, capacitance type potential transformer is ensured Equipment safety.
Brief description of the drawings
Fig. 1 is detection means schematic diagram.
Fig. 2 is detection method schematic flow sheet.
Embodiment
Accompanying drawing being given for example only property explanation, it is impossible to be interpreted as the limitation to this patent;
In order to more preferably illustrate the present embodiment, some parts of accompanying drawing have omission, zoomed in or out, and do not represent actual product Size;
To those skilled in the art, it is to be appreciated that some known features and its explanation, which may be omitted, in accompanying drawing 's.
Technical scheme is described further with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of multichannel capacitance type potential transformer real-time detection apparatus, if the detection means includes main line Voltage acquisition sending module and background terminal, per the side that voltage acquisition sending module all passes through radio communication with background terminal all the way Formula establishes connection;The capacitance type potential transformer for including being connected with each other per voltage acquisition sending module all the way, alternating current turn Change circuit, microprocessor, power supply, data storage and transmission equipment;Power conversion circuit is exchanged with capacitance type potential transformer to connect Connect;Exchange power conversion circuit is also connected with microprocessor;Microprocessor is also connected with transmission equipment;Microprocessor is also deposited with data Reservoir connects;Power supply is connected with microprocessor;Power supply is also connected with transmission equipment.
Described microprocessor is dominant frequency 72MHz enhanced STM32 chips, and the chip functions include analog-to-digital conversion, height Fast sampling, data comparison, the transmission conversion of parallel/serial row, sampling frequency are set as 100KHz.
Described transmission equipment is WiFi transmission equipments.
Described exchange power conversion circuit is the bleeder circuit that miniature transformer or resistance form.
Described background terminal is integral type Integrated Processing Unit, and the integrated apparatus function includes reception signal, signal Processing, provide human-computer interaction interface.
Described data storage is NOR Flash.
As shown in Fig. 2 a kind of detection method of multichannel capacitance type potential transformer real-time detection apparatus, including following step Suddenly:
Step A:In per voltage acquisition sending module all the way, exchange power conversion circuit gathers to capacitance type potential transformer Real-time voltage be depressured, obtain analog signal;
Step B:Microprocessor is AD converted to the obtained analog signals of step A, obtains data signal;
Step C:Whether the data signal that judgment step B is obtained has mutation, if the jump signal is then stored in by mutation Abnormal data memory;
Step D:The data signal obtained to step B carries out signal transacting;
Step E:The signal that jump signal and step D in step C obtain passes through parallel/serial transmission modular converter serial transmission To transmission equipment, background terminal is then transferred to by transmission equipment;
Step F:Background terminal carries out secondary contrast processing to transmitting the signal come per voltage acquisition sending module all the way;
Step G:Comparing result is fed back into staff.
The step D specifically comprises the following steps:
When the signal that step B is obtained is normal, the signal progress cycle is averaged, each cycle is one minute, is then exported Average data;When the signal that step B is obtained has mutation, jump signal is recorded, and be averaged instead of one minute with jump signal Data, then output mutation signal.
The step F specifically comprises the following steps:
Step 1:Background terminal according to voltage acquisition sending module transmit come signal number, divide the logic of same number Unit;
Step 2:Background terminal finds out the jump signal in the signal that the transmission of voltage acquisition sending module comes, and is patrolled accordingly Collect and mark capacitance type potential transformer problematic in unit;
Step 3:Background terminal does not have the data addition calculation average value of jump signal to each road, and the average value is stored in Into each logic unit in addition to the logic unit marked except step 2, while corresponding voltage acquisition sending module is obtained The data arrived are stored in respective logic unit, then by respective data compared with average value, and draw deviation;
Step 4:By deviation compared with the variance thresholds of the corresponding voltage class set, if beyond threshold values Quote the abnormal information of capacitance type potential transformer.
Same or analogous label corresponds to same or analogous part;
Term the being given for example only property explanation of position relationship described in accompanying drawing, it is impossible to be interpreted as the limitation to this patent;
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.It is all this All any modification, equivalent and improvement made within the spirit and principle of invention etc., should be included in the claims in the present invention Protection domain within.

Claims (9)

1. a kind of multichannel capacitance type potential transformer real-time detection apparatus, it is characterised in that if the detection means includes main line Voltage acquisition sending module and background terminal, per the side that voltage acquisition sending module all passes through radio communication with background terminal all the way Formula establishes connection;The capacitance type potential transformer for including being connected with each other per voltage acquisition sending module all the way, alternating current turn Change circuit, microprocessor, power supply, data storage and transmission equipment;Power conversion circuit is exchanged with capacitance type potential transformer to connect Connect;Exchange power conversion circuit is also connected with microprocessor;Microprocessor is also connected with transmission equipment;Microprocessor is also deposited with data Reservoir connects;Power supply is connected with microprocessor;Power supply is also connected with transmission equipment.
2. detection means according to claim 1, it is characterised in that described microprocessor is dominant frequency 72MHz enhancing Type STM32 chips, the chip functions include analog-to-digital conversion, high-speed sampling, data comparison, the transmission conversion of parallel/serial row, sampling frequency It is set as 100KHz.
3. detection means according to claim 1, it is characterised in that described transmission equipment is WiFi transmission equipments.
4. detection means according to claim 1, it is characterised in that described exchange power conversion circuit is miniature transformer Or the bleeder circuit of resistance composition.
5. detection means according to claim 1, it is characterised in that described background terminal fills for integral type integrated treatment Put, the integrated apparatus function includes reception signal, signal transacting, provides human-computer interaction interface.
6. detection means according to claim 1, it is characterised in that described data storage is NOR Flash.
A kind of 7. detection side of multichannel capacitance type potential transformer real-time detection apparatus according to claim 1~6 any one Method, it is characterised in that comprise the following steps:
Step A:In per voltage acquisition sending module all the way, the reality that power conversion circuit gathers to capacitance type potential transformer is exchanged When voltage be depressured, obtain analog signal;
Step B:Microprocessor is AD converted to the obtained analog signals of step A, obtains data signal;
Step C:Whether the data signal that judgment step B is obtained has mutation, and the jump signal then is stored in into exception if being mutated Data storage;
Step D:The data signal obtained to step B carries out signal transacting;
Step E:The signal that jump signal and step D in step C obtain passes through parallel/serial transmission modular converter serial transmission to biography Transfer device, background terminal is then transferred to by transmission equipment;
Step F:Background terminal carries out secondary contrast processing to transmitting the signal come per voltage acquisition sending module all the way;
Step G:Comparing result is fed back into staff.
8. detection method according to claim 7, it is characterised in that the step D is specific as follows:
When the signal that step B is obtained is normal, the signal progress cycle is averaged, each cycle is one minute, and then output is average Data;When the signal that step B is obtained has mutation, abrupt information is recorded, and the average data of one minute is replaced with jump signal, Then output mutation signal.
9. detection method according to claim 8, it is characterised in that the step F is specific as follows:
Step 1:Background terminal according to voltage acquisition sending module transmit come signal number, divide the logic list of same number Member;
Step 2:Background terminal finds out the jump signal in the signal that the transmission of voltage acquisition sending module comes, in corresponding logic list Mark capacitance type potential transformer problematic in member;
Step 3:Background terminal does not have the data addition calculation average value of jump signal to each road, and the average value is deposited into and removed In each logic unit beyond the logic unit that step 2 marks, while corresponding voltage acquisition sending module is obtained Data are stored in respective logic unit, then by respective data compared with average value, and draw deviation;
Step 4:By deviation compared with the variance thresholds of the corresponding voltage class set, quoted if beyond threshold values The abnormal information of capacitance type potential transformer.
CN201710350512.4A 2017-05-17 2017-05-17 Multi-path capacitive voltage transformer real-time detection device Active CN107607764B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100045301A1 (en) * 2007-01-01 2010-02-25 Maxwell Technologies, Inc. Apparatus and method for monitoring high voltage capacitors
CN102129763A (en) * 2011-01-10 2011-07-20 北京交通大学 CVT (Capacitor Voltage Transformer) online monitoring system
CN103454517A (en) * 2013-06-26 2013-12-18 广东电网公司佛山供电局 Method for online monitoring capacitive voltage transformers
CN105182268A (en) * 2014-05-29 2015-12-23 国网山西省电力公司电力科学研究院 Method and device for monitoring operating state of capacitor voltage transformer
CN105548943A (en) * 2016-01-25 2016-05-04 中国南方电网有限责任公司超高压输电公司梧州局 CVT capacitor online monitoring method based on CVT secondary voltage monitoring

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100045301A1 (en) * 2007-01-01 2010-02-25 Maxwell Technologies, Inc. Apparatus and method for monitoring high voltage capacitors
CN102129763A (en) * 2011-01-10 2011-07-20 北京交通大学 CVT (Capacitor Voltage Transformer) online monitoring system
CN103454517A (en) * 2013-06-26 2013-12-18 广东电网公司佛山供电局 Method for online monitoring capacitive voltage transformers
CN105182268A (en) * 2014-05-29 2015-12-23 国网山西省电力公司电力科学研究院 Method and device for monitoring operating state of capacitor voltage transformer
CN105548943A (en) * 2016-01-25 2016-05-04 中国南方电网有限责任公司超高压输电公司梧州局 CVT capacitor online monitoring method based on CVT secondary voltage monitoring

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