CN106900114A - Submarine observation network bank base ground breaking protection circuit based on great power LED - Google Patents
Submarine observation network bank base ground breaking protection circuit based on great power LED Download PDFInfo
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- CN106900114A CN106900114A CN201710150301.6A CN201710150301A CN106900114A CN 106900114 A CN106900114 A CN 106900114A CN 201710150301 A CN201710150301 A CN 201710150301A CN 106900114 A CN106900114 A CN 106900114A
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- led
- protection modules
- observation network
- submarine observation
- bank base
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Audible And Visible Signals (AREA)
Abstract
The invention discloses a kind of submarine observation network bank base protection circuit; the circuit includes LED protection modules; LED protection modules are in parallel by N roads; it is the Chip-R series connection of K great power LED and 10 Ω per road; the positive pole of LED protection modules terminates the positive output end of high voltage power supply, the other end connecting building ground of LED protection modules.There is disconnection failure when anode, then LED protection modules conducting of the present invention, LED maintains conducting, and sends light.Now high voltage power supply forms loop by building ground and seawater negative electrode ground; plug into box still can normal work, but now can consume building ground, therefore staff find protection board LED it is shinny after should immediately close high voltage power supply; and whether be normally connected with positive source with checking anode, repaired.
Description
Technical field
The present invention relates to submarine observation network technical field, and in particular to a kind of submarine observation network bank based on great power LED
Base breaking protection circuit.
Background technology
The transmission of electricity framework of submarine observation network electric energy feed system is somewhat dependent upon power transmission mode, because of power transmission mode
Based on direct current, monopole, constant pressure, the transmission of electricity architecture of the submarine observation network studied determines voltage etc. under the power transmission mode
Level, loop fashion, and polarity of voltage.
1) remote electric energy is transmitted and generally uses the mode for improving transmission voltage to reduce the loss on power transmission line to increase
Ability to transmit electricity.But under water in electric power system, transmission voltage is often limited by high-low pressure transformation of electrical energy at transmission cable and node and sets
Standby proof voltage grade.The DC break down voltage grade of currently available deep-sea extra large cable is main in 10kV ranks, while more than 10kV
The development cost of DC/DC conversion equipments is high under water.Therefore, transmission voltage grade highest order 10kVDC.
2) the deep-sea optoelectronic composite cable of uniconductor employs deep-sea cable structure, only one copper conductor, can only single line it is defeated
Electricity, transmission of electricity loop fashion is transmitted electricity for single line, the mode of seawater loop.
3) using single line transmission of electricity, it is necessary to be plugged into box end in bank station feeder ear and under water node during the mode of seawater loop
Electrode is respectively mounted, wherein, it is anode if electrode is connected with the high potential end of power supply, it be then the moon to be connected with low potential end
Pole.Anode is loss-type material, needs periodic replacement, and negative electrode is inert material, without changing.Under abyssal environment, electrode is more
Change relatively costly, difficulty is larger, for ease of safeguarding, negative electrode is arranged in seabed to anode arrangement in bank station.So, the power supply of bank station
The high potential end of power supply is directly connected with seawater, forms negative high voltage and powers.As shown in Figure 1.
Fig. 2 is the principle sketch powered of submarine observation network negative high voltage, and high voltage power supply typically is adjusted into 8.3kv, with plugging into
The scientific instrument quantity connected on box increases, and its impedance also changes within the specific limits, causes total current i1Excursion be
0.1~0.4A.
Anode ground is an iron rod long, and impedance is about 20 Ω, installed in the warehouse underground on bank.Negative electrode is to plug into box in seabed
Neighbouring seawater, negative electrode is directly connected with anode by seawater and the earth, and impedance is negligible.Because the system passes through sacrificial anode
The mode on ground is powered to box of plugging into, and anode ground (iron rod long) needs periodic replacement, therefore anode ground can be sent out with the connecting line of power supply
The failure of raw following several situations：It is aging at wiring to be broken；Electric wire is bitten broken by mouse；Workman does not connect when installing.
More than occurring after several situations, can all be disconnected with positive source anode, two ill effects can be caused：
1) due to only having negative pole to be connected to box of plugging into, current loop is not formed, so box of plugging into cannot work.
If 2) now have staff to touch high-voltage power cathode to export, positive pole can be connected by human body with the earth, and with
The negative electrode of seawater forms loop, causes staff to get an electric shock, and causes danger.
The content of the invention
The purpose of the present invention is to solve the shortcomings of the prior art, there is provided a kind of submarine observation network based on great power LED
Bank base ground breaking protection circuit.
Submarine observation network bank base protection circuit of the invention includes LED protection modules, and LED protection modules are in parallel by N roads, often
Road is the Chip-R series connection of K great power LED and 10 Ω, and the positive pole of LED protection modules terminates the just defeated of high voltage power supply
Go out to hold, the other end connecting building ground of LED protection modules, wherein N, K are determined by following formula：
Wherein：I--- total working electric currents, unit：mA
N--- circuitry numbers
The number of LED in K--- single channel
R1--- anode ground impedance, unit：Ω
R2--- building ground impedance, unit：Ω.
To be on the safe side, the circuit is in parallel in case one of LED protection modules event using two LED protection modules
Barrier, the system can continue normal work.
Preferably, described LED protection modules are in parallel by six tunnels, it is the patch of 7 great power LEDs and 10 Ω per road
Sheet resistance is connected.The effect of LED：When not turning on, LED impedances are very big, equivalent to open circuit；Assume that every road electric current is after conducting
0.1A, the then pressure drop that can obtain each LED by Fig. 3 is about 2.6V, then the stagnation pressure after 7 LED strip connection is reduced to 18.2V, and can send
Light, gives staff's warning.
Chip-R is acted on：If without resistance, the mode on 6 tunnel in parallel again after only being joined using 7 LED strips, due to radiating
The difference of condition, can cause the unbalanced of 6 tunnel temperature, it is assumed that the temperature on the 1st tunnel is higher than other several roads, because temperature is higher
The conducting resistance of LED is smaller, then the electric current on the 1st tunnel rises, and can make more powerful, the luminous brighter, heating on the 1st tunnel tighter again
Weight, causes positive feedback, and last result is that the 1st tunnel temperature can be significantly larger than other several roads, causes the LED on the 1st tunnel to overheat and burns out.
After per a Chip-R is added all the way, it is assumed that the 1st tunnel temperature has risen with respect to other several roads, then the LED on the 1st tunnel leads
The resistance that is powered reduces, and conducting electric current rises, then the voltage at Chip-R two ends can also rise so that the pressure drop of LED reduces, power
Reduce, play a part of negative-feedback.
Described LED protection modules are generally disposed in transparent boxes, and box surrounding is provided with ventilating opening.
Brief description of the drawings
Fig. 1 is submarine observation network transmission of electricity model；
Fig. 2 is that submarine observation network is powered model sketch；
Fig. 3 is XLAMP XT-E LED forward direction I-V diagrams；
Fig. 4 is the circuit diagram of LED protection modules in the present invention；
Fig. 5 is positive feedback (a) and negative-feedback (b) flow chart；
Fig. 6 is that the submarine observation network after optimization is powered model sketch.
Specific embodiment
LED is substantially that the chip of one piece of very little is encapsulated in epoxy resin the inside, so it is very small, very
Gently, power consumption is low, and its internal characteristics determines that it is that optimal light source goes to replace traditional light source, there is extensive purposes.
LED can be divided into small-power by watt level classification, high-power (typically the lamp of more than 1W to be called in industry high-power
Lamp, conventional is 1W).High-power refers to luminous intensity product higher, such as common LED lamp tube, because this kind of product
, all than larger, luminous efficiency is (brightness is higher) higher, so being categorized as great power LED for package dimension.Small-power refers to luminous strong
The relatively low product of degree, such as common indicator lamp, mobile phone backlight, because the package dimension of this kind of product is all smaller, light
Less efficient (brightness is relatively low, be generally used for indicating, show), so being categorized as low-power LED.
There is the LED (luminous intensity 100mcd) of general brightness by luminous intensity and operating current point；Luminous intensity 10
High brightness LED is between~100mcd.The operating current of general LED is in the mA of more than ten mA to tens, and low current LED
Operating current in below 2mA.
By the structure of light emitting diode point have the encapsulating of loopful oxygen, metab epoxy packages, ceramic base epoxy packages and
The structures such as glass-encapsulated, are divided to by packaged type, there is two kinds of plug-in type and paster, can additionally be launched according to glow color, light
Angle, exiting surface shape etc. are classified.
The Xlamp XT-E type great power LEDs of cree companies are used in this project, this is a silicon carbide-based base patch
The white high light high current LED of chip package, maximum operating currenbt is 1.5A, and maximum node temperature is 150 DEG C, forward direction work electricity
Pressure (350mA, under 85 DEG C of operating mode) is 2.85V.Its positive I-V diagram as shown in figure 3, such LED can be seen that by this figure can
To regard forward conduction voltage as the diode of 2.5V as.Forward voltage can regard open circuit, forward voltage as when being less than 2.5V
It is luminous more than being begun to turn on after 2.5V, and with the increase of conducting electric current, its forward voltage drop also slowly raising, brightness also by
Gradual change is big.This characteristic can be applied in submarine observation network electric power system to solve afterflow and police during the open circuit of anode ground
Report is acted on.
Fig. 4 is the circuit theory diagrams of bank base protection board of the invention, according to the experiment of LED, when single channel conducting electric current is more than
After 20mA, the luminous intensity that it sends is just sufficiently high, can cause the attention of staff to play warning function, so we set
Fixed is 20mA per minimum working current all the way.But with the rising of electric current, the node temperature of LED also can rapid increase, lead to
Excess temperature long duration test, input voltage 20.1V, electric current 1.014A in parallel using two pieces of bank base protection boards, per road electric current
84.5mA, temperature is stablized at 94 degree or so always after 11 hours of experiment, so we are set per maximum operating currenbt all the way
It is 85mA.The relational expression of the total working electric current for so just having drawn system and the circuitry number that should be used：
Wherein：I--- total working electric currents, unit：mA
N--- circuitry numbers
Can be obtained by the positive I-V diagram of LED again, to make the minimum forward voltage drop of single led conducting for 2.5V, and consider ground connection
Resistance has certain excursion, selectes 1.5 times of safety coefficient, it can be deduced that the number of the LED that single channel should be selected with
The relational expression of system parameters：
Wherein：I--- total working electric currents, unit：mA
The number of LED in K--- single channel
R1--- anode ground impedance, unit：Ω
R2--- building ground impedance, unit：Ω
The maximum operating currenbt of South Sea observational network is 0.4A, and anode ground impedance is about 20 Ω, and building ground impedance is about 5 Ω,
It is 5 to 20 that the span of circuitry number N then can be calculated by formula, and the value of the number K of LED should be greater than 4 in single channel, therefore
Using per 10 Ω resistant series of LED and one, road 7 in this project, every piece of tunnel of plank 6 uses two boards to be on the safe side
It is in parallel.
The effect of LED：When not turning on, LED impedances are very big, equivalent to open circuit；Assume per road electric current to be 0.1A after conducting, then
The pressure drop that can obtain each LED by Fig. 3 is about 2.6V, then the stagnation pressure after 7 LED strip connection is reduced to 18.2V, and can send light, gives
Staff alerts.
Chip-R is acted on：If without resistance, the mode on 6 tunnel in parallel again after only being joined using 7 LED strips, due to radiating
The difference of condition, can cause the unbalanced of 6 tunnel temperature, it is assumed that the temperature on the 1st tunnel is higher than other several roads, because temperature is higher
The conducting resistance of LED is smaller, then the electric current on the 1st tunnel rises, and can make more powerful, the luminous brighter, heating on the 1st tunnel tighter again
Weight, causes positive feedback, and last result is that the 1st tunnel temperature can be significantly larger than other several roads, causes the LED on the 1st tunnel to overheat and burns out.
Flow such as Fig. 5 a；After per a Chip-R is added all the way, it is assumed that the 1st tunnel temperature has risen with respect to other several roads, then
The LED conducting resistances on the 1st tunnel reduce, and conducting electric current rises, then the voltage at Chip-R two ends can also rise so that LED's
Pressure drop reduces, power reduction, plays a part of negative-feedback, flow such as Fig. 5 b.
Protection board is arranged in see-through card gram force box after completing, and box surrounding has ventilating opening, when preventing its work
Temperature is too high.
As shown in fig. 6, two block protection plate parallel connections are followed by high-voltage power cathode output, then with being connected to building (through measurement
Impedance is about 5 Ω), the use of two boards is to be worked on after one piece of plank failure.Assuming that the He Suojie sections that plug into
Learn instrument and be operated in peak power, do not break down, now high voltage power supply output current i anode1About 0.4A, due to not leading
Logical LED forward impedances are very big, then anode earth-current i3=i1=0.4A, then U1=8V<18.2V, LED will maintain what is be not turned on
State, now submarine observation network electric power system be operated in normal condition, i.e. high voltage power supply pass through anode ground to seawater negative electrode ground
To plugging into, box is powered.
If there is the failure that anode ground disconnects, i3=0, i2=i1=0.4A, LED are turned on, and every road electric current of protection board is
0.033A, it is 2.55V that the forward conduction voltage drop that can obtain each LED by Fig. 3 is about, then U1=2.55 × 10+0.033 × 10+0.4
× 5=20.18V, LED maintain conducting, and send light.Now high voltage power supply is formed back by building ground and seawater negative electrode ground
Road, plug into box still can normal work, but now can consume building ground, therefore staff find protection board LED it is shinny after should
Close high voltage power supply immediately, and whether be normally connected with positive source with checking anode, repaired.
Claims (5)
1. it is a kind of based on great power LED submarine observation network bank base ground breaking protection circuit, it is characterised in that the circuit includes
LED protection modules, LED protection modules are in parallel by N roads, are the Chip-R series connection of K great power LED and 10 Ω per road,
The positive pole of LED protection modules terminates the positive output end of high voltage power supply, the wherein other end connecting building ground of LED protection modules, N, K
Determined by following formula：
Wherein：I--- total working electric currents, unit：mA
N--- circuitry numbers
The number of LED in K--- single channel
R1--- anode ground impedance, unit：Ω
R2--- building ground impedance, unit：Ω.
2. submarine observation network bank base protection circuit according to claim 1, it is characterised in that the value model of N in the circuit
It is 5 to 20 to enclose, and the value of the number K of LED should be greater than 4 in single channel.
3. submarine observation network bank base protection circuit according to claim 1, it is characterised in that described LED protection modules
It is in parallel by six tunnels, it is the Chip-R series connection of 7 great power LEDs and 10 Ω per road.
4. submarine observation network bank base protection circuit according to claim 1, it is characterised in that the circuit uses two LED
Protection module parallel connection is in case one of LED protection modules failure.
5. submarine observation network bank base protection circuit according to claim 1, it is characterised in that described LED protection modules
It is arranged in transparent boxes, box surrounding is provided with ventilating opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710150301.6A CN106900114B (en) | 2017-03-14 | 2017-03-14 | Submarine observation network bank base based on great power LED ground breaking protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710150301.6A CN106900114B (en) | 2017-03-14 | 2017-03-14 | Submarine observation network bank base based on great power LED ground breaking protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106900114A true CN106900114A (en) | 2017-06-27 |
| CN106900114B CN106900114B (en) | 2018-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710150301.6A Active CN106900114B (en) | 2017-03-14 | 2017-03-14 | Submarine observation network bank base based on great power LED ground breaking protection circuit |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001309553A (en) * | 2000-04-25 | 2001-11-02 | Nec Ocean Eng Ltd | Feed method and branch feed apparatus for submarine observation system |
| JP2006290263A (en) * | 2005-04-14 | 2006-10-26 | Ihi Marine United Inc | Power feeding device for vessel and power feeding switching method in vessel |
| CN103427395A (en) * | 2012-05-21 | 2013-12-04 | 台达电子工业股份有限公司 | Open circuit protection circuit, open circuit protection method and lighting device |
-
2017
- 2017-03-14 CN CN201710150301.6A patent/CN106900114B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001309553A (en) * | 2000-04-25 | 2001-11-02 | Nec Ocean Eng Ltd | Feed method and branch feed apparatus for submarine observation system |
| JP2006290263A (en) * | 2005-04-14 | 2006-10-26 | Ihi Marine United Inc | Power feeding device for vessel and power feeding switching method in vessel |
| CN103427395A (en) * | 2012-05-21 | 2013-12-04 | 台达电子工业股份有限公司 | Open circuit protection circuit, open circuit protection method and lighting device |
Non-Patent Citations (1)
| Title |
|---|
| JUN WANG 等: "Developing a power monitoring and protection system for the junction boxes of an experimental seafloor observatory network", 《FRONTIERS OF INFORMATION TECHNOLOGY & ELECTRONIC ENGINEERING》 * |
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| CN106900114B (en) | 2018-09-28 |
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Effective date of registration: 20200131 Address after: 226400 Yangkou Port Business Building, Yangkou Port Economic Development Zone, Rudong County, Nantong City, Jiangsu Province Patentee after: ZHONGTIAN TECHNOLOGY MARINE SYSTEMS Co.,Ltd. Address before: 310058 Xihu District, Zhejiang, Yuhang Tong Road, No. 866, No. Patentee before: ZHEJIANG University |
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