CN101996762A - Circuit transformer ferromagnetic resonance preventing device - Google Patents
Circuit transformer ferromagnetic resonance preventing device Download PDFInfo
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- CN101996762A CN101996762A CN2009101445139A CN200910144513A CN101996762A CN 101996762 A CN101996762 A CN 101996762A CN 2009101445139 A CN2009101445139 A CN 2009101445139A CN 200910144513 A CN200910144513 A CN 200910144513A CN 101996762 A CN101996762 A CN 101996762A
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Abstract
The invention relates to a circuit transformer ferromagnetic resonance preventing device. The device comprises a CPU (central processing unit), an analog acquisition module, a harmonic elimination module, a clock module, a storage module, a liquid crystal display module and a fault recorder module, wherein the output of the signal input analog acquisition module from a transformer assisting secondary winding is connected with the CPU, the resonant data output of the CPU is connected with the storage module, the CPU is connected with a local area network through the fault recorder module and uploads fault data, and the harmonic elimination control signal output of the CPU is connected with the harmonic elimination module. The device can monitor the real-time data of a CVT (capacitor voltage transformer) in real time; for a circuit transformer which needs a harmonic elimination resistor to assist harmonic elimination, after ferromagnetic resonance is judged by a system, the system can put the harmonic elimination resistor with given resistance into the circuit transformer per se; the device is suitable for the circuit transformers with two voltage levels, namely 110kV and 220kV; the device has dual event records; and when the ferromagnetic resonance happens, the circuit transformer ferromagnetic resonance preventing device records the event, and uploads the ferromagnetic resonance data to a background monitor at the same time.
Description
Technical field
The present invention relates to field of electrical equipment, press for a kind of circuit to become anti-ferro resonance device.
Background technology
It is the visual plant of electric power system that circuit is pressed change, has considerable effect.Circuit is pressed to become and is mainly used in reclosing, and inspection is pressed with examining not have the same period.For various reasons, ferro resonance can take place in circuit CVT, and this can seriously influence the safe and stable operation of electrical network.Therefore, necessary development circuit is pressed and is become anti-ferro resonance device to promote fail safe, the reliability of trunk operation of power networks.
Relational language is explained:
The CVT------------------------capacitance type potential transformer;
Be installed on transformer station's outlet side in the circuit CVT------------------electric power system, being used for circuit reclosing, the inspection same period and inspection does not have the CVT that presses.One general configuration principle is the A circuit CVT that matches, B, the C coupling capacitor that matches;
------------------be a kind of defective form in the electric power system, with the phenomenon of capacitive original paper generation series resonance, divides high-frequency resonant, industrial frequency resonance and low-frequency resonant owing to perceptual original paper magnetic saturation in the circuit for ferro resonance; Its resonance frequency is unfixing, is generally three frequency division, two divided-frequency, power frequency, frequency tripling;
Harmonic elimination resistance------------------pure resistance, the help harmonic elimination that drops into during ferro resonance;
Circuit is pressed and is become the special microcomputer harmonic elimination apparatus at circuit CVT of anti-ferro resonance device----, the i.e. product of this patent;
----------part of-----" circuit is pressed and become anti-ferro resonance device " writes down the ferro resonance waveform and transmits the ferro resonance waveform signal to the backstage monitoring equipment failure wave-recording module when being responsible for fault;
For the harmonic elimination measure of circuit CVT, 3 points are arranged probably: the first, change parameter; The second, modifier neutral grounding mode; Three, with the resistance damping of consuming energy.Because the circuit CVT of transformer station is mounted shaped article, we can not go to change the parameter of its inductance, electric capacity as the user of equipment, so first method is infeasible.Second method, the modifier neutral grounding mode, also infeasible.Reason is very simple, and the earthing mode of electric power system has the regulation of electric power system self, can not have an equipment hidden danger of ferro resonance can occur because of in the middle of several thousand equipment, and remove the modifier neutral grounding mode.Conversely, if really change neutral grounding mode on the contrary entail dangers to the safety of miscellaneous equipment.So remaining just have only a kind of method---with the resistance damping of consuming energy.
Circuit on the market is pressed and is become anti-ferro resonance device, and what be primarily aimed at is to be pressed and become (CVT or PT) by A, B, the three-phase integrated bus of constructing of C, measures its triangle opening voltage.And the microcomputer harmonic elimination on the market mostly at be electromagnetic potential transformer (PT).But the circuit in the middle of on-the-spot is pressed and is become, and has only a phase, and is mostly capacitance type potential transformer (CVT).So, the necessary microcomputer harmonic elimination apparatus of developing special at circuit CVT.
And existing microcomputer harmonic elimination apparatus adopts modes such as printer or built-in EEPROM to write down the resonance incident on the market, limited the record of resonance data greatly, harmonic elimination starts definite value can not freely be set, and this just causes the validity of harmonic elimination and to the integrality of resonance logout.
Summary of the invention
Technical problem to be solved by this invention provide a kind of freely set harmonic elimination startup value, in real time monitor CVT specially at the microcomputer harmonic elimination apparatus of circuit CVT.
The technical solution adopted in the present invention is: circuit is pressed to become and is prevented that the ferro resonance device comprises CPU (1), analogue collection module (2), harmonic elimination module (3), clock module (4), memory module (5), LCD MODULE (6), failure wave-recording module (7).
From pressing the signal input analog amount acquisition module (2) that becomes auxiliary secondary winding, the output of analogue collection module (2) connects CPU (1),
The resonance data output of CPU (1) connects memory module (5),
CPU (1) connects local area network (LAN) and uploads fault data by failure wave-recording module (7),
The harmonic elimination control signal output of CPU (1) connects harmonic elimination module (3).
Advantage of the present invention
1.. this device is special microcomputer harmonic elimination apparatus at circuit CVT, can monitor the real time data of CVT in real time;
2.. this device is needs to be dropped into harmonic elimination resistance press change with the circuit that helps harmonic elimination, and after system was judged as ferro resonance, system can drop into the harmonic elimination resistance of promptly deciding resistance voluntarily;
3.. this device can be applicable to that the circuit pressure of 110kV, two electric pressures of 220kV becomes;
4.. this device has dual logout, and when ferro resonance took place, circuit was pressed and become anti-ferro resonance device recording incident, uploads the ferro resonance data to the backstage monitoring equipment simultaneously;
5.. this device is reserved with expanded function: can insert combining of corporate lan technology, the background monitoring machine can conduct interviews to communication processor at local area network (LAN) optional position access to LAN, easily realizes remote monitoring; Data before and after the real time record harmonic wave takes place, and upload the background computer stored waveform.
Description of drawings
Fig. 1 is a structure principle chart of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Basic mentality of designing of the present invention is: circuit CVT secondary side voltage signal inserts " the anti-ferro resonance device of circuit pressure change ", after circuit presses the anti-ferro resonance device of change to collect the signal of telecommunication of on-site CVT, go out the magnitude of voltage of three frequency division, two divided-frequency, power frequency, frequency tripling equifrequent component by certain algorithm computation, and with these component voltage values and setting threshold relatively (also requirement can be revised setting threshold voluntarily according to field condition):
1.. if less than setting threshold, device is thought ferro resonance is not taken place;
If 2.. greater than setting threshold, think ferro resonance has taken place;
3.. if having resonance to produce, circuit presses the anti-ferro resonance device of change to upload fault recorder data by communication manager;
4.. to the circuit CVT of frequent generation ferro resonance, circuit presses the anti-ferro resonance device of change to set up a module, and when being set to ferro resonance takes place separately, circuit presses the anti-ferro resonance device of change to drop into harmonic elimination resistance help harmonic elimination automatically.
As shown in Figure 1,
(1). circuit is pressed and is become the anti-ferro resonance device course of work
After circuit presses the anti-ferro resonance device of change to collect the signal of telecommunication of on-site CVT, go out the magnitude of voltage of three frequency division, two divided-frequency, power frequency, frequency tripling equifrequent component by DFT+ Hanning window algorithm computation, and relatively (this device default setting threshold value: three frequency division is that 17V, two divided-frequency are that 25V, power frequency are that 160V, frequency tripling are 33V with these component voltage values and setting threshold; Can also revise setting threshold voluntarily according to field condition):
If 1.. greater than setting threshold, think ferro resonance has taken place, the corresponding remote signalling of set position (as: resonance is arranged, recorder data etc. is arranged), and recording events record;
2.. if less than setting threshold, device is thought ferro resonance is not taken place;
3.. if having resonance to produce, circuit presses the anti-ferro resonance device of change to upload fault recorder data by communication manager;
4.. whether no matter there is resonance to produce, circuit is pressed and is become anti-ferro resonance device and calculate, judge and upload the magnitude of voltage of three frequency division, two divided-frequency, power frequency, frequency tripling equifrequent component in real time and whether resonance is arranged, relevant remote signalling such as recorder data is arranged;
5.. to the circuit CVT of frequent generation ferro resonance, circuit presses the anti-ferro resonance device of change to set up a module, and when being set to ferro resonance takes place separately, circuit presses the anti-ferro resonance device of change to drop into harmonic elimination resistance help harmonic elimination automatically.Detailed process is as follows:
Circuit is pressed and is become anti-ferro resonance device monitoring behind ferro resonance, after time-delay in 0.03 second, judge whether ferro resonance in addition once more, if also have ferro resonance, circuit is pressed to become and is prevented that the ferro resonance device starts the high power solid state relay that has the zero cross fired function by photoelectric isolating device.When voltage zero-cross, the automatic conducting of high power solid state relay, into the residue winding is incorporated harmonic elimination resistance in sealing voltage input two ends (X4-2 and X4-4), eliminates resonance.So perseveration is three times, each closed 45ms (time can be adjusted), and action is 200ms at interval.After the high power solid state relay outlet release, circuit presses the anti-ferro resonance device of change to restart to monitor ferro resonance, if find still to exist ferro resonance behind the 0.5s, circuit is pressed to become and prevented that the ferro resonance device just sends the resonance over voltage alarm.
(2). expanded function:
This circuit is pressed and is become anti-ferro resonance device leaves access to LAN into this device interface.Thereby realize a substation is had the centralized monitor of circuit CVT, realize collection and preservation simultaneously the ferro resonance waveform.
The key point of the present invention or inventive concept
1.. this device is special microcomputer harmonic elimination apparatus at circuit CVT,
2.. this device can artificially be adjusted the judgment threshold of ferro resonance,
3.. this device is reserved with expanded function: can insert combining of corporate lan technology, the background monitoring machine can conduct interviews to communication processor at local area network (LAN) optional position access to LAN, easily realizes remote monitoring; Data before and after the real time record harmonic wave takes place, and upload the background computer stored waveform.
4.. upload resonance and the Wave data of front and back takes place and be stored in background computer, be used to the rule of judging that resonance takes place.
Claims (1)
1. circuit is pressed and is become anti-ferro resonance device, comprises CPU (1), analogue collection module (2), harmonic elimination module (3), clock module (4), memory module (5), LCD MODULE (6), failure wave-recording module (7), it is characterized in that:
From pressing the signal input analog amount acquisition module (2) that becomes auxiliary secondary winding, the output of analogue collection module (2) connects CPU (1),
The resonance data output of CPU (1) connects memory module (5),
CPU (1) connects local area network (LAN) and uploads fault data by failure wave-recording module (7),
The harmonic elimination control signal output of CPU (1) connects harmonic elimination module (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101445139A CN101996762A (en) | 2009-08-14 | 2009-08-14 | Circuit transformer ferromagnetic resonance preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101445139A CN101996762A (en) | 2009-08-14 | 2009-08-14 | Circuit transformer ferromagnetic resonance preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101996762A true CN101996762A (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101445139A Pending CN101996762A (en) | 2009-08-14 | 2009-08-14 | Circuit transformer ferromagnetic resonance preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101996762A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049558A (en) * | 2014-05-30 | 2014-09-17 | 安徽三和电力技术有限公司 | Novel microcomputer controller |
| CN104410070A (en) * | 2014-12-21 | 2015-03-11 | 国家电网公司 | Method for controlling frequent signal emission of microcomputer resonance eliminating device |
| CN104600688A (en) * | 2015-02-17 | 2015-05-06 | 安徽巨森电器有限公司 | Overvoltage suppression comprehensive device with GPRS (general packet radio service) wireless communication function |
-
2009
- 2009-08-14 CN CN2009101445139A patent/CN101996762A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049558A (en) * | 2014-05-30 | 2014-09-17 | 安徽三和电力技术有限公司 | Novel microcomputer controller |
| CN104410070A (en) * | 2014-12-21 | 2015-03-11 | 国家电网公司 | Method for controlling frequent signal emission of microcomputer resonance eliminating device |
| CN104600688A (en) * | 2015-02-17 | 2015-05-06 | 安徽巨森电器有限公司 | Overvoltage suppression comprehensive device with GPRS (general packet radio service) wireless communication function |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110330 |