CN201601492U - Optional-adjustment automatic tracing compensation arc extinction control device - Google Patents
Optional-adjustment automatic tracing compensation arc extinction control device Download PDFInfo
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- CN201601492U CN201601492U CN2009202888125U CN200920288812U CN201601492U CN 201601492 U CN201601492 U CN 201601492U CN 2009202888125 U CN2009202888125 U CN 2009202888125U CN 200920288812 U CN200920288812 U CN 200920288812U CN 201601492 U CN201601492 U CN 201601492U
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- 230000008033 biological extinction Effects 0.000 title abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 47
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- 229910052710 silicon Inorganic materials 0.000 description 5
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- 230000033228 biological regulation Effects 0.000 description 3
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Abstract
The utility model discloses an optional-adjustment automatic tracing compensation arc extinction control device, which relates to an arc extinction device for an alternating-current electric distribution network. The structure of the control device includes that a signal processing module is respectively connected with a three-phase bus and a grounding transformer; a compensation control module, the signal processing module, a man-machine interface module and a power supply module for supplying power are respectively connected with a central processing module; and the compensation control module is connected with arc extinction coils. By multiple approximant compensations, the control device realizes accurate and rapid compensation adjustment, achieves the purpose of rapidly removing arcs, and can effectively avoid system shock. The control device is capable of adopting the system that a plurality of control devices parallelly run so as to realize parallel running of a plurality of sets of the arc extinction coils, distributing coil capacity in real-time manner, meeting the gradually increasing dilatation requirement of the electric distribution network, providing various serial port communication protocols and realizing automatic uploading and acquisition of data.
Description
Technical field
The utility model relates to a kind of arc-extinction device that is used for the AC distribution net, relates in particular to a kind of with mode automatic tracking and compensating arc distinction control device; It specifically is a kind of control device of arc suppression coil of the automatic tracking and compensating that is used for 3～66kV grade isolated neutral electrical network.
Background technology
The power distribution network of domestic 3～66kV all is the radioactivity structure based on overhead wire at present, and circuit is long, and load is heavy, and load unbalanced, and inductive load is bigger; And vast urban area is extensive use of power cable line, have the higher and bigger characteristics of investigation difficulty of insulation risk, therefore, all there is the to a certain degree possibility of single-phase earthing in above-mentioned power distribution network, for improving power supply reliability, generally adopt the not directly grounded mode of neutral point.Single phase ground fault (account for failure rate 80%) under the not directly grounded situation of neutral point, takes place in rules regulations, allows operation to be no more than 2 hours.Single phase ground fault is divided three classes, metallic earthing, through impedance earth with through arcing ground.When the arcing ground fault takes place, the easy damage equipment of electric arc, even cause two-phase even three-phase shortcircuit, therefore, the DL/T 620-1997 that Ministry of Power Industry issues " overvoltage protection of alternating-current electric device and insulation coordination " regulation, surpass following numerical value and need under earth-fault conditions, move, should take use arc coil ground connection: the overhead transmission line formation of (1) 3～10kV armored concrete or metal shaft tower with all 35kV, 66kV single-phase earth fault current greater than 10A; (2) single-phase earth fault current of (2) .3～10kV cable formation is greater than 30A.The use of arc suppression coil then can reduce earth fault current, accelerates the arc extinguishing process.
Adopt more arc suppression coil compensation control mode that capacitor tuning type, turn-adjusting and phase modulation formula are arranged at present both at home and abroad, adjustable capacitive-based arc-suppression coil less stable wherein, maintenance cost is higher, the turn-adjusting arc suppression coil is subjected to the restriction of loaded switch cost, causing regulating progression can not be too high, thereby can't realize compensating comparatively accurately, therefore, the less use of above-mentioned dual mode.And along with the raising of controllable silicon manufacturing process, phase modulation formula controllable silicon arc suppression coil is regulated rapidly with its dependable performance, and the characteristics that short-circuit impedance is high have obtained application more and more widely.
Currently marketed controller product mostly be to calculate earthing capacitance current by measuring, thereby the required compensation rate of the system that calculates is once regulated compensation.Yet, methods such as current widely used displacement voltage curve method, alien frequencies injection method can't realize the accurate measuring and calculating of capacitance current, thereby it is inaccurate to cause compensation rate to be calculated, there is certain uncertainty in result after the compensation, might not reach the purpose of eliminating aftercurrent by undercompensation, also might just in time be positioned at resonance point, cause system's concussion.Development along with urban and rural economies, the electric load demand progressively improves, the power distribution network capacity also progressively increases, operational mode is tending towards variation, in some cases, list cover arc suppression coil system can't satisfy the operation demand of power distribution network, and the many covers of configuration arc suppression coil systems need dispose according to the heap(ed) capacity of single hop bus, cause economy to descend, user's operation expense improves.
Summary of the invention
Main purpose of the present utility model just is to overcome the shortcoming and defect that prior art exists, providing a kind of can change by the automatic tracing and measuring capacitance current, and adopt the mode dynamically approach, accurately and reliably, but and paired running and dynamically adjust load with mode automatic tracking and compensating arc distinction control device.
The purpose of this utility model is achieved in that
1, technology path
1. adopt high-precision A/D sampling module, adopt accurate analog circuitry processes,, make the control device certainty of measurement higher, move more reliable in conjunction with Anti-interference Design.
2. adopt high speed digital signal processor, handle to realize high speed, accurate signal, so that calculate capacitance current fast.
3. adopt the two cpu models of data operation and man-machine interface, do not disturb mutually.
4. complete data communication interface makes it easy to and various system data exchanges.
5. a kind of low in energy consumption, power-on time is long, lightning protection properties is good D.C. regulated power supply is provided.
2, concrete technical scheme
Operational environment of the present utility model comprises three-phase bus, grounding transformer and the arc suppression coil that connects successively;
Be provided with central processing module, compensation control module, signal processing module, human-machine interface module and power supply module;
Signal processing module is connected with grounding transformer with three-phase bus respectively;
Compensation control module, signal processing module, human-machine interface module are connected with central processing module respectively with the power supply module;
The compensation control module is connected with arc suppression coil.
Signal processing module is responsible for the acquisition process signal, human-machine interface module 400 is responsible for device interface and communication, the power supply module is responsible for device the galvanic current source is provided, and the compensation control module receives the result of calculation of central processing module and generates the angle of flow of control signal with the control arc suppression coil.
Signal processing module is responsible for gathering and the digital signal of AD conversion offers central processing module;
Central processing module is a core component of the present utility model, is responsible for data processing, the calculating of controllable silicon adjusting angle and the functions such as transmission of control command;
Human-machine interface module provides operator and the utility model, and the passage of information exchange between the utility model;
The compensation control module is responsible for generating control signal corresponding control arc suppression coil according to the result of calculation of central processing module.
Power supply is responsible for providing the safety power supply of work precision.
Operation principle of the present utility model is:
Signal processing module is gathered three-phase bus voltage U a, Ub and Uc, neutral point displacement voltage U in real time
00, and aftercurrent In, and above-mentioned analog quantity changed and processing such as filtering, and be converted to digital quantity by the multidiameter delay AD converter; Central processing module carries out software processes to above-mentioned digital signal, and is monitored and analyze, and calculates capacitance current Ic in real time, and analysis meter is calculated system and whether is had fault, calculate the required compensation rate of silicon controlled in real time, by compensation control module processing and amplifying, output compensating signal; Human-machine interface module shows process information in real time, and exports parallel machine or control centre to by communication interface on display screen.
The utlity model has following advantage and good effect:
1, by repeatedly approximant compensation,, reaches the purpose of going out rapidly, and can effectively avoid system's concussion except that electric arc to realize compensated regulation accurately and rapidly.
2, can adopt the mechanism of many control device paired runnings,, distribute the coil capacity in real time, satisfy the growing dilatation demand of power distribution network to realize many cover arc suppression coil paired runnings;
3, provide various serial communication protocols, can realize uploading automatically and obtaining of data.
In a word, the utility model certainty of measurement height can be realized fine compensation and can avoid resonance point and can be online by approaching, and is flexible and convenient to use.
Description of drawings
Fig. 1 is a block diagram of the present utility model;
Fig. 2 is the block diagram of signal processing module.
Wherein:
The 100-central processing module,
The 110-digital signal processor,
The 120-programmable logic controller (PLC);
200-compensates control module;
The 300-signal is adopted the reason module,
The 310-signal processing circuit,
The 320-threephase potential transformer,
The 330-single-phase potential transformer,
340-monophase current instrument transformer;
The 400-human-machine interface module;
The 410-microprocessing unit,
The 420-LCD,
The 410-keyboard,
The 410-communication interface;
500-power supply module;
The 600-three-phase bus;
The 700-arc suppression coil;
The 800-grounding transformer.
English to Chinese:
1, DSP-digital signal processor;
2, PLD-programmable logic controller (PLC);
3, ARM-Business Name;
4, MCU-microprocessing unit;
5, CPU-central processing unit.
Embodiment
Describe in detail below in conjunction with drawings and Examples:
One, overall
As Fig. 1, operational environment of the present utility model comprises three-phase bus 600, grounding transformer 800 and the arc suppression coil 700 that connects successively;
Be provided with central processing module 100, compensation control module 200, signal processing module 300, human-machine interface module 400 and power supply module 500;
Two, each functional block
1, central processing module 100
As Fig. 1, central processing module 100 comprises digital signal processor (DSP) 110 and programmable logic controller (PLC) (PLD) 120 integrated and that be packaged together.
(1) digital signal processor 110
The TMS320F series 28XX series of products that digital signal processor 110 selects for use TI company to produce.
The 28XX series DSP is 32 supercomputing chips, and high primary frequency reaches 150MHz, and characteristics such as have that stable performance, integrated level height, expansion interface are abundant, fast operation and energy consumption are low can realize multiple sophisticated functions on single-chip.
The 28XX chip is integrated 16 tunnel 12 bit A/D converters, built-in 2 groups of sample/hold circuits, the AD clock is 25MHz, the sampling period that can realize minimum 80nS.28XX provides interfaces such as SCI, SPI, CAN, I2C, can conveniently articulate various external equipments.
(2) programmable logic controller (PLC) 120
The 95XC144 that programmable logic controller (PLC) selects for use Xilinx company to produce, the controlled quentity controlled variable of DSP being calculated gained converts pulse or digital quantity to, outputs to compensation control module 200 and carries out arc extinction compensation to drive controllable silicon.PLD can change logical construction in the sheet flexibly, to adapt to the hardware platform versatility of different model SCR control module product.
2, the signal acquisition process module 300
As Fig. 1,2, data processing module 300 comprises signal processing circuit 310, threephase potential transformer 320, single-phase potential transformer 330 and monophase current instrument transformer 340;
Threephase potential transformer 320, single-phase potential transformer 330 and monophase current instrument transformer 340 are connected with signal processing circuit 310 respectively.
The 1 the tunnel is interconnective three-phase voltage filter circuit 311a in front and back and three-phase voltage modulate circuit 311b;
The 2 the tunnel is interconnective single-phase voltage filter circuit 312a in front and back and single-phase voltage modulate circuit 312b;
The 3 the tunnel is interconnective monophase current filter circuit 313a in front and back and monophase current modulate circuit 313b.
The operation principle of signal processing module 300 is:
Threephase potential transformer 320, single-phase potential transformer 330 and monophase current instrument transformer 340 be respectively with voltage U a, Ub and the Uc of three-phase bus 600, neutral point displacement voltage U
00, and aftercurrent In all converts voltage signal to, carries out active power filtering and signal condition for signal processing circuit 310, adjusting becomes the signal that is fit to digital signal processor 110 samplings.
Threephase potential transformer 320, single-phase potential transformer 330 and monophase current instrument transformer 340 are the common function components and parts;
Each filter circuit in the signal processing circuit 310 and each modulate circuit are the common function components and parts.
3, human-machine interface module 400
As Fig. 2, human-machine interface module 400 selects for use the ARM core as microprocessor unit (MCU) 410, external display 420, keyboard 430 and communication interface 440.
4, compensation control module 200
5, the power supply module 500
6, three-phase bus 600
Three-phase bus 600 is this device operational environment, is generally the power distribution network of 3～66kV, adopts delta connection.
7, arc suppression coil 700
8, grounding transformer 800
Grounding transformer 800 is used for the neutral point of delta connection is drawn, and offers arc suppression coil 700, and grounding transformer 700 adopts the Z type to connect usually.
Claims (3)
1. one kind with mode automatic tracking and compensating arc distinction control device, and its operational environment comprises three-phase bus (600), grounding transformer (800) and the arc suppression coil (700) that connects successively; It is characterized in that:
Be provided with central processing module (100), compensation control module (200), signal processing module (300), human-machine interface module (400) and power supply module (500);
Signal processing module (300) is connected with grounding transformer (800) with three-phase bus (600) respectively;
Compensation control module (200), signal processing module (300), human-machine interface module (400) are connected with central processing module (100) respectively with power supply module (500);
Compensation control module (200) is connected with arc suppression coil (700).
2. described with mode automatic tracking and compensating arc distinction control device by claim 1, it is characterized in that:
Central processing module (100) comprises digital signal processor (110) and programmable logic controller (PLC) (120) integrated and that be packaged together.
3. described with mode automatic tracking and compensating arc distinction control device by claim 1, it is characterized in that:
Data processing module (300) comprises signal processing circuit (310), threephase potential transformer (320), single-phase potential transformer (330) and monophase current instrument transformer (340);
Threephase potential transformer (320), single-phase potential transformer (330) and monophase current instrument transformer (340) are connected with signal processing circuit (310) respectively:
Signal processing circuit (310) comprises three the tunnel:
The 1 the tunnel is front and back interconnective three-phase voltage filter circuit (311a) and three-phase voltage modulate circuit (311b);
The 2 the tunnel is front and back interconnective single-phase voltage filter circuit (312a) and single-phase voltage modulate circuit (312b);
The 3 the tunnel is front and back interconnective monophase current filter circuit (313a) and monophase current modulate circuit (313b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202888125U CN201601492U (en) | 2009-12-04 | 2009-12-04 | Optional-adjustment automatic tracing compensation arc extinction control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202888125U CN201601492U (en) | 2009-12-04 | 2009-12-04 | Optional-adjustment automatic tracing compensation arc extinction control device |
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| Publication Number | Publication Date |
|---|---|
| CN201601492U true CN201601492U (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202888125U Expired - Lifetime CN201601492U (en) | 2009-12-04 | 2009-12-04 | Optional-adjustment automatic tracing compensation arc extinction control device |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976832A (en) * | 2010-10-20 | 2011-02-16 | 思源电气股份有限公司 | Method for realizing online operation of multiple intelligent arc suppression coils |
| CN102385014A (en) * | 2011-11-10 | 2012-03-21 | 江苏省电力公司射阳县供电公司 | Test instrument for arc suppression coil compensation device |
| CN102638031A (en) * | 2012-03-31 | 2012-08-15 | 上海市电力公司 | Arc suppression coil device |
-
2009
- 2009-12-04 CN CN2009202888125U patent/CN201601492U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976832A (en) * | 2010-10-20 | 2011-02-16 | 思源电气股份有限公司 | Method for realizing online operation of multiple intelligent arc suppression coils |
| CN101976832B (en) * | 2010-10-20 | 2013-03-06 | 思源电气股份有限公司 | Method for realizing online operation of multiple intelligent arc suppression coils |
| CN102385014A (en) * | 2011-11-10 | 2012-03-21 | 江苏省电力公司射阳县供电公司 | Test instrument for arc suppression coil compensation device |
| CN102638031A (en) * | 2012-03-31 | 2012-08-15 | 上海市电力公司 | Arc suppression coil device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: THE ELECTRIC POWER SCIENCE RESEARCH INSTITUTE OF H Free format text: FORMER OWNER: HUBEI PROV. POWER TEST INST. Effective date: 20121023 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121023 Address after: 430077 Hubei city of Wuhan province Wuchang Xudong Avenue No. 361 Patentee after: Hubei Zhongxing Electric Power Experiment Research Co., Ltd. Patentee after: Hubei Electric Power Research Institute of Power Company Patentee after: State Grid Corporation of China Address before: 430077 Hubei city of Wuhan province Wuchang Xudong Avenue No. 361 Patentee before: Hubei Zhongxing Electric Power Experiment Research Co., Ltd. Patentee before: Hubei Prov. Power Test Inst. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101006 |
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| CX01 | Expiry of patent term |