CN205229339U - Distributing type converter transformer dc magnetic biasing detecting system - Google Patents
Distributing type converter transformer dc magnetic biasing detecting system Download PDFInfo
- Publication number
- CN205229339U CN205229339U CN201521009168.5U CN201521009168U CN205229339U CN 205229339 U CN205229339 U CN 205229339U CN 201521009168 U CN201521009168 U CN 201521009168U CN 205229339 U CN205229339 U CN 205229339U
- Authority
- CN
- China
- Prior art keywords
- transformer
- module
- central controller
- converter
- data acquisition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 27
- 230000001133 acceleration Effects 0.000 claims abstract description 18
- 230000007935 neutral effect Effects 0.000 claims description 33
- 238000009434 installation Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000012545 processing Methods 0.000 description 19
- 238000001228 spectrum Methods 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000007630 basic procedure Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a distributing type converter transformer dc magnetic biasing detecting system, including a plurality of detection terminal, detection terminal includes sensor module, data acquisition module, central controller, communication module, clock module and power module, sensor module, data acquisition module, central controller, communication module are consecutive, clock module and central controller link to each other, power module links to each other with data acquisition module, central controller, communication module respectively, sensor module includes microphone, acceleration sensor and current transformer. The utility model discloses can overcome wide, the in large quantity problem of transformer substation distribution range, and not need too much manpower and equipment resource, have that the test mode is nimble, the lower advantage of cost.
Description
Technical field
The utility model relates to power transformer DC magnetic biasing detection technique, is specifically related to a kind of distributed converter transformer DC magnetic bias detection system.
Background technology
Ultra-high/extra-high voltage direct current transportation has that electric energy loss is low, the advantage of long transmission distance, is the important means solving National energy distribution and economic development imbalance problem.Along with the operation of Large Copacity, long distance DC power transmission line, when DC transmission system is run in ground return circuit mode, near current conversion station, between AC Substation grounded screen, there is potential difference (PD).Now, the portion of electrical current in current conversion station earthing pole, by the neutral point inflow transformer through transformer, makes exciting current occur distort and produce a large amount of harmonic wave, causes transformer core magnetic flux half-wave saturated, DC magnetic bias phenomena occurs.When DC magnetic biasing appears in transformer, on the one hand, magnetostriction unshakable in one's determination strengthens, and vibration noise aggravates; On the other hand, stray field unshakable in one's determination increases, and causes the loss increase of transformer hardware, temperature rise increases, cause local overheating, insulate impaired, finally cause reduce the serviceable life of transformer.Therefore, before current conversion station puts into operation, need to adopt ground return circuit mode to debug, to determine that AC Substation near it affects distribution situation and degree of susceptibility by DC magnetic biasing, and then formulate DC magnetic biasing control measure.
In order to determine that AC Substation near current conversion station affects situation by DC magnetic biasing, at present, transformer noise and neutral point current mainly adopt two cover instruments to detect respectively, namely sound meter measuring transformer noise is utilized, current tester is utilized to detect transformer neutral point electric current, detailed process is: first utilize software to carry out simulation calculation, the transformer station position that prediction influenced by DC magnetic biasing is stronger, staff goes to substation field respectively, difference measuring transformer noise and neutral point current before and after the ground return circuit method of operation is adopted at current conversion station, the influence degree of DC magnetic biasing is judged by the Data Comparison measuring front and back.Due to the influenced many factors of simulation calculation, the difficulty therefore accurately grasping influenced transformer station quantity and position is comparatively large, may there is omission situation.In addition, influenced transformer station distribution range is comparatively wide, and tester and the number of devices of the method needs are more, and test mode lacks dirigibility, easily causes manpower and material resources to waste.
Utility model content
The technical problems to be solved in the utility model: for the problems referred to above of prior art, there is provided a kind of and can overcome the problem that transformer station has a very wide distribution, quantity is many, and do not need too much manpower and equipment resource, flexible, the lower-cost distributed converter transformer DC magnetic bias detection system of test mode.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of distributed converter transformer DC magnetic bias detection system, comprise multiple sense terminals, described sense terminals comprises sensor assembly, data acquisition module, central controller, communication module, clock module and power module, described sensor assembly, data acquisition module, central controller, communication module are connected successively, described clock module is connected with central controller, described power module is connected with data acquisition module, central controller, communication module respectively, and described sensor assembly comprises microphone, acceleration transducer summation current transformer.
Preferably, the reference field 1m of described microphone installation site distance converter power transformer, and be positioned at 1/2 height and position of converter power transformer.
Preferably, described acceleration transducer is adsorbed on the tank surface of converter power transformer by magnetic support and is positioned at 1/2 height and position of converter power transformer, and cooling device and the casing reinforcement of converter power transformer tank surface are avoided in the installation of described acceleration transducer.
Preferably, described current transformer is installed on the grounded neutral of converter power transformer, and is run through by neutral ground wire.
Preferably, the sampling rate of described data acquisition module is higher than 40kHz.
Described communication module is GPRS communication module.
The utility model distributed converter transformer DC magnetic bias detection system has following advantage: the utility model distributed converter transformer DC magnetic bias detection system comprises multiple sense terminals, and sense terminals comprises sensor assembly, data acquisition module, central controller, communication module, clock module and power module, sensor assembly, data acquisition module, central controller, communication module is connected successively, and clock module is connected with central controller, power module respectively with data acquisition module, central controller, communication module is connected, and sensor assembly comprises microphone, acceleration transducer summation current transformer, based on microphone, acceleration transducer summation current transformer can realize carrying out for each converter power transformer the noise sound that DC magnetic biasing detects required noise signal, the 1/3 octave component spectrum of vibration signal, the velocity amplitude of vibration signal, the distributed capture of the basis signal of neutral point current effective value, can overcome transformer station and have a very wide distribution, the difficulty that quantity is many, and do not need too much manpower and equipment resource, there is detection mode flexible, lower-cost advantage.
Accompanying drawing explanation
Fig. 1 is the framed structure schematic diagram of the utility model embodiment system.
Fig. 2 is the framed structure schematic diagram of sense terminals in the utility model embodiment.
Fig. 3 is the basic procedure schematic diagram of the utility model embodiment detection method.
Marginal data: 1, sense terminals; 11, sensor assembly; 111, microphone; 112, acceleration transducer; 113, current transformer; 12, data acquisition module; 13, central controller; 14, communication module; 15, clock module; 16, power module; 2, CPU (central processing unit).
Embodiment
As depicted in figs. 1 and 2, the distributed converter transformer DC magnetic bias detection system of the present embodiment comprises multiple sense terminals 1, sense terminals 1 comprises sensor assembly 11, data acquisition module 12, central controller 13, communication module 14, clock module 15 and power module 16, sensor assembly 11, data acquisition module 12, central controller 13, communication module 14 is connected successively, clock module 15 is connected with central controller 13, power module 16 respectively with data acquisition module 12, central controller 13, communication module 14 is connected, sensor assembly 11 comprises microphone 111, acceleration transducer 112 summation current transformer 113.Can realize carrying out for each converter power transformer noise sound, the 1/3 octave component spectrum of vibration signal, the distributed capture of the velocity amplitude of vibration signal, the basis signal of neutral point current effective value that DC magnetic biasing detects required noise signal based on microphone 111, acceleration transducer 112 summation current transformer 113, the difficulty that transformer station has a very wide distribution, quantity is many can be overcome, and do not need too much manpower and equipment resource, there is flexible, the lower-cost advantage of detection mode.
In the present embodiment, the reference field 1m of microphone 111 installation site distance converter power transformer, and be positioned at 1/2 height and position of converter power transformer.In the present embodiment, acceleration transducer 112 is adsorbed on the tank surface of converter power transformer by magnetic support and is positioned at 1/2 height and position of converter power transformer, cooling device and the casing reinforcement of converter power transformer tank surface are avoided in the installation of acceleration transducer 112, arranged by said structure, guarantee acceleration transducer 112 can accurate acquisition to the vibration signal of converter power transformer.In the present embodiment, current transformer 113 is installed on the grounded neutral of converter power transformer, and is run through by neutral ground wire.In the present embodiment, the sampling rate of data acquisition module 12, higher than 40kHz, is arranged based on above-mentioned sample frequency, can realize the covering completely to audio frequency.
In the present embodiment, communication module 14 is GPRS communication module, GPRS communication module adopts 2G mobile communications network (GPRS network), has the advantage that territory, network communication coverage area is wide, purchase cost is low, is especially applicable to the communication of the smallest number of distributed converter transformer DC magnetic bias detection system.In addition, communication module 14 also can adopt the communication module of the types such as 3G/4G as required.
As shown in Figure 3, the step based on the DC magnetic biasing detection method of the aforementioned DC magnetic biasing detection system of the present embodiment comprises:
1) in advance for each converter power transformer installs sense terminals 1, and arrange a CPU (central processing unit) 2 for all sense terminals 1, each sense terminals 1 is connected with CPU (central processing unit) 2 respectively by internet; In the present embodiment, CPU (central processing unit) 2 adopts computing machine to realize, and CPU (central processing unit) 2 is each sense terminals 1 distributes an overall situation unique numbering, the corresponding converter power transformer of numbering that each overall situation is unique;
2) under converter power transformer normal operating mode, steering order is sent to each sense terminals 1 by CPU (central processing unit) 2, sense terminals 1 is after receiving steering order, the noise signal of converter power transformer is detected by microphone 111, acceleration transducer 112 detects the vibration signal of converter power transformer, current transformer 113 detects the neutral point current signal of converter power transformer, then the noise sound of noise signal is calculated by central controller 13, calculate the 1/3 octave component spectrum of vibration signal and the velocity amplitude of vibration signal, calculate the neutral point current effective value of neutral point current signal, and by the noise sound of the noise signal under normal operating mode, the 1/3 octave component spectrum of vibration signal, the velocity amplitude of vibration signal, neutral point current effective value sends to CPU (central processing unit) 2 by internet, CPU (central processing unit) 2 preserves the noise sound that each sense terminals 1 detects the noise signal obtained under converter power transformer normal operating mode respectively, the 1/3 octave component spectrum of vibration signal, the velocity amplitude of vibration signal, neutral point current effective value,
3) under converter power transformer one pole ground return circuit commissioning test mode, steering order is sent to each sense terminals 1 by CPU (central processing unit) 2, sense terminals 1 is after receiving steering order, the noise signal of converter power transformer is detected by microphone 111, acceleration transducer 112 detects the vibration signal of converter power transformer, current transformer 113 detects the neutral point current signal of converter power transformer, then the noise sound of noise signal is calculated by central controller 13, calculate the 1/3 octave component spectrum of vibration signal and the velocity amplitude of vibration signal, calculate the neutral point current effective value of neutral point current signal, and by the noise sound of the noise signal under one pole ground return circuit commissioning test mode, the 1/3 octave component spectrum of vibration signal, the velocity amplitude of vibration signal, neutral point current effective value sends to CPU (central processing unit) 2 by internet, CPU (central processing unit) 2 is preserved each sense terminals 1 respectively under converter power transformer normal operating mode, is detected the noise sound of the noise signal obtained, the 1/3 octave component spectrum of vibration signal, the velocity amplitude of vibration signal, neutral point current effective value,
4) for each converter power transformer, first CPU (central processing unit) 2 compares the 1/3 octave component spectrum of the vibration signal under normal operating mode, one pole ground return circuit commissioning test mode, judge whether the difference of more than 500Hz high frequency components in the 1/3 octave component spectrum of vibration signal exceedes predetermined threshold value, if do not exceed predetermined threshold value, judge that this converter power transformer does not belong to DC magnetic biasing treatment range; Exceed predetermined threshold value else if, under then comparing normal operating mode, one pole ground return circuit commissioning test mode, whether the difference of the noise sound of noise signal, the velocity amplitude of vibration signal, neutral point current effective value three-phase index all exceedes corresponding predetermined threshold value
a i (
i=1,2,3), if the difference of three-phase index all exceedes corresponding predetermined threshold value, then judge that this converter power transformer belongs to DC magnetic biasing treatment range, otherwise judge that this converter power transformer does not belong to DC magnetic biasing treatment range.
The present embodiment can to the noise sound of noise signal in AC Substation near current conversion station, the 1/3 octave component spectrum of vibration signal, the velocity amplitude of vibration signal, neutral point current effective value carries out Distributed Detection and analysis, and the result after analyzing is sent to CPU (central processing unit) 2 by wireless transmission method, by the noise sound of noise signal before and after contrast current conversion station one pole ground return circuit commissioning test mode, the 1/3 octave component spectrum of vibration signal, the velocity amplitude of vibration signal, neutral point current effective value, realize judgement and the location of transformer DC magnetic bias situation, the specific aim being conducive to transformer DC magnetic bias controls, there is cost low, sensing range is wide, the advantage of convenient test.
In the present embodiment, step 2) in the 1/3 octave component of the noise sound of the noise signal under normal operating mode, vibration signal is composed, neutral point current effective value is when sending to CPU (central processing unit) 2 by internet, specifically refer to that by the 1/3 octave component of the noise sound of the noise signal under normal operating mode, vibration signal spectrum, the velocity amplitude of vibration signal, neutral point current effective value code conversion be 16 carry system codes, then this 16 carry system code is sent to CPU (central processing unit) 2 by internet; In step 3), the 1/3 octave component of the noise sound of the noise signal under one pole ground return circuit commissioning test mode, vibration signal is composed, neutral point current effective value is when sending to CPU (central processing unit) 2 by internet, specifically refer to that by the 1/3 octave component of the noise sound of the noise signal under one pole ground return circuit commissioning test mode, vibration signal spectrum, the velocity amplitude of vibration signal, neutral point current effective value code conversion be 16 carry system codes, then this 16 carry system code is sent to CPU (central processing unit) 2 by internet.
In the present embodiment, 16 carry system codes comprise area number, transformer station's numbering, transformer numbering, detection time, noise sound, the 1/3 octave component spectrum of vibration signal, neutral point current effective value, the velocity amplitude of vibration signal, check bit.
In the present embodiment, noise sound is specially equivalent continuous A sound level.
It should be noted that, DC magnetic biasing detection method based on the present embodiment aforementioned DC magnetic biasing detection system is only a kind of detection method special case of the present embodiment aforementioned DC magnetic biasing detection system as hardware foundation, but the aforementioned DC magnetic biasing detection system of the present embodiment do not rely on the realization of the method.Such as, sense terminals 1 detects the neutral point current signal of converter power transformer only by the vibration signal that microphone 111 detects the noise signal of converter power transformer, acceleration transducer 112 detects converter power transformer, current transformer 113, then the original signal of collection is all sent to CPU (central processing unit) 2, calculated the velocity amplitude of the noise sound of noise signal, the 1/3 octave component spectrum calculating vibration signal and vibration signal by CPU (central processing unit) 2, calculated the neutral point current effective value of neutral point current signal, and carry out follow-up DC magnetic biasing diagnosis.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (6)
1. a distributed converter transformer DC magnetic bias detection system, it is characterized in that: comprise multiple sense terminals (1), described sense terminals (1) comprises sensor assembly (11), data acquisition module (12), central controller (13), communication module (14), clock module (15) and power module (16), described sensor assembly (11), data acquisition module (12), central controller (13), communication module (14) is connected successively, described clock module (15) is connected with central controller (13), described power module (16) respectively with data acquisition module (12), central controller (13), communication module (14) is connected, described sensor assembly (11) comprises microphone (111), acceleration transducer (112) summation current transformer (113).
2. distributed converter transformer DC magnetic bias detection system according to claim 1, is characterized in that: the reference field 1m of described microphone (111) installation site distance converter power transformer, and is positioned at 1/2 height and position of converter power transformer.
3. distributed converter transformer DC magnetic bias detection system according to claim 2, it is characterized in that: described acceleration transducer (112) is adsorbed on the tank surface of converter power transformer by magnetic support and is positioned at 1/2 height and position of converter power transformer, and cooling device and the casing reinforcement of converter power transformer tank surface are avoided in the installation of described acceleration transducer (112).
4. distributed converter transformer DC magnetic bias detection system according to claim 3, is characterized in that: described current transformer (113) is installed on the grounded neutral of converter power transformer, and is run through by neutral ground wire.
5. distributed converter transformer DC magnetic bias detection system according to claim 4, is characterized in that: the sampling rate of described data acquisition module (12) is higher than 40kHz.
6. according to the distributed converter transformer DC magnetic bias detection system in Claims 1 to 5 described in any one, it is characterized in that: described communication module (14) is GPRS communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521009168.5U CN205229339U (en) | 2015-12-08 | 2015-12-08 | Distributing type converter transformer dc magnetic biasing detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521009168.5U CN205229339U (en) | 2015-12-08 | 2015-12-08 | Distributing type converter transformer dc magnetic biasing detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205229339U true CN205229339U (en) | 2016-05-11 |
Family
ID=55904396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521009168.5U Active CN205229339U (en) | 2015-12-08 | 2015-12-08 | Distributing type converter transformer dc magnetic biasing detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205229339U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467241A (en) * | 2015-12-08 | 2016-04-06 | 国家电网公司 | A distributed converter transformer direct current bias detection system and a detection method thereof |
| CN106249076A (en) * | 2016-07-22 | 2016-12-21 | 国家电网公司 | By the distribution transformer condition detection method under the influence of harmonic load and system |
-
2015
- 2015-12-08 CN CN201521009168.5U patent/CN205229339U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467241A (en) * | 2015-12-08 | 2016-04-06 | 国家电网公司 | A distributed converter transformer direct current bias detection system and a detection method thereof |
| CN105467241B (en) * | 2015-12-08 | 2018-04-13 | 国家电网公司 | A kind of distribution converter transformer DC magnetic bias detecting system and its detection method |
| CN106249076A (en) * | 2016-07-22 | 2016-12-21 | 国家电网公司 | By the distribution transformer condition detection method under the influence of harmonic load and system |
| CN106249076B (en) * | 2016-07-22 | 2019-10-11 | 国家电网公司 | Distribution transformer condition detection method and system under the influence of by harmonic load |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105467241A (en) | A distributed converter transformer direct current bias detection system and a detection method thereof | |
| CN105424172B (en) | A kind of distributed power transformer noise detection system and its noise detecting method | |
| CN102288857B (en) | Fault arc identification and detection method and detection protection device | |
| CN101782621B (en) | Method and device for judging fault point locations in cable protective layer fault detection | |
| CN102707167B (en) | State monitoring system for grounding grid based on industrial personal computer | |
| CN103091606B (en) | Grounding fault detecting method for direct current system with high anti-interference capacity | |
| CN102928704A (en) | Intelligent diagnosis method for corrosion failure point of transformer substation grounding grid | |
| CN202720309U (en) | Detection and positioning system for partial discharging | |
| CN106249076A (en) | By the distribution transformer condition detection method under the influence of harmonic load and system | |
| CN202975173U (en) | Ground capacitance measuring instrument in transformer substation power distribution system | |
| CN102830344A (en) | System and method for automatically testing function of circuit board | |
| CN205229339U (en) | Distributing type converter transformer dc magnetic biasing detecting system | |
| CN110940938A (en) | Device and method for detecting connection relation between user electric meter and transformer | |
| CN104459490A (en) | Ultrasonic wave analysis device and system for GIS breakdown positioning in electric system | |
| CN205228628U (en) | Distributing type power transformer noise detection system | |
| CN203658521U (en) | Mobile insulation supervision instrument of transformer station DC system | |
| CN205353294U (en) | Fault electric arc detecting device's test equipment | |
| CN203745540U (en) | Power grid low-frequency synchronous oscillating source identifying apparatus based on oscillation component power directions | |
| CN206132970U (en) | Ultrasonic wave partial discharge measurement system under site environment | |
| CN205003237U (en) | Device that screening of guide body line defect detected on ground net | |
| CN210923872U (en) | Online discrimination system of distribution terminal trouble | |
| CN110007143B (en) | Resonance point detection method based on voltage harmonic amplitude | |
| CN203054126U (en) | An electric power system disturbance source positioning system based on higher harmonic equivalent impedance characteristics | |
| CN203350385U (en) | Direct current system parasitic circuit on-line detection apparatus | |
| CN202614865U (en) | Grounding grid state monitoring device based on industrial control computer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |