CN205229339U - Distributing type converter transformer dc magnetic biasing detecting system - Google Patents

Distributing type converter transformer dc magnetic biasing detecting system Download PDF

Info

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
converter
central controller
data acquisition
Prior art date
Application number
CN201521009168.5U
Other languages
Chinese (zh)
Inventor
吴晓文
周年光
彭继文
胡胜
陶莉
黄韬
Original Assignee
国家电网公司
国网湖南省电力公司
国网湖南省电力公司电力科学研究院
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 国家电网公司, 国网湖南省电力公司, 国网湖南省电力公司电力科学研究院 filed Critical 国家电网公司
Priority to CN201521009168.5U priority Critical patent/CN205229339U/en
Application granted granted Critical
Publication of CN205229339U publication Critical patent/CN205229339U/en

Links

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

A kind of distributed converter transformer DC magnetic bias detection system
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.
CN201521009168.5U 2015-12-08 2015-12-08 Distributing type converter transformer dc magnetic biasing detecting system CN205229339U (en)

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 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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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
US9823289B2 (en) Automated digital earth fault system
CN101833051B (en) Electrified tester for zinc oxide arrester
CN101907437B (en) Wavelet difference algorithm-based cable fault localization method
CN102841296B (en) Online monitoring system and method for partial discharge of intelligent switch cabinet based on ultra-high frequency detection
CN101216523B (en) Substation grounding net defect diagnostic method and apparatus
CN103135038B (en) Straight-flow system exchanges crosstalk and insulation fault monitoring selection method
CN201355384Y (en) System for detecting and managing partial discharge of switch cabinet on-line
CN103293443B (en) A kind of distribution network overhead line Earth design method
CN203249989U (en) Transformer partial discharge on-line monitoring system
CN102998511B (en) A kind of lightning arrester discharge current monitoring device
CN107121609A (en) A kind of electric network impedance on-line identification method and device that injection is disturbed based on PRBS
CN1316256C (en) Electric network geomagnetic induction current monitoring method and apparatus
CN103913679B (en) High-tension switch cabinet partial discharge monitoring system
CN101943719B (en) Shared-frequency asynchronous phase-checking method
CN104076319B (en) Online error analysis system of digitized electric energy metering device
CN102608452A (en) High speed train equipment state and electric energy quality monitoring system and method
Farughian et al. Review of methodologies for earth fault indication and location in compensated and unearthed MV distribution networks
CN102841294B (en) Method for identifying signal and interference signal in ultrahigh frequency partial discharge detection in electrical equipment
CN103197133B (en) A kind of shunting of the large ground network based on wireless transmission vector quantity measurement method
CN204462305U (en) A kind of distribution line disconnection monitor based on electric current and voltage vector
CN201269916Y (en) Regional discharging detection system for air insulation combined electrical appliance
CN204964493U (en) Wireless remote sea water quality of water environment measuring equipment
CN202041575U (en) Condition monitoring system for zinc oxide lightning arrester
CN102928704B (en) Intelligent diagnosis method for corrosion failure point of transformer substation grounding grid
CN102072999B (en) Connection testing device of electric energy metering device and using method thereof

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant