CN102170119A - Combined surge protection device (SPD) with LC (inductance-capacitance) decoupling element - Google Patents
Combined surge protection device (SPD) with LC (inductance-capacitance) decoupling element Download PDFInfo
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- CN102170119A CN102170119A CN2010105130836A CN201010513083A CN102170119A CN 102170119 A CN102170119 A CN 102170119A CN 2010105130836 A CN2010105130836 A CN 2010105130836A CN 201010513083 A CN201010513083 A CN 201010513083A CN 102170119 A CN102170119 A CN 102170119A
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- 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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
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Abstract
The invention relates to a combined surge protection device (SPD) with an LC (inductance-capacitance) decoupling element, belonging to the field of lightning science and technology. The SPD comprises a combined SPD and a SPD working condition recording device, wherein the combined SPD carries out earth release on invaded lightning surges; and the SPD working condition recording device monitors the SPD working conditions. The SPD is high in through-flow capacity, can realize real-time monitoring, provides reliable data support for lighting accident analysis, and reaches the purpose of preventing damages of electronic and electric equipment caused by the surges.
Description
Technical field
The present invention relates to a kind of combined electrical surge protector of the LC of containing decoupling component, belong to thunder and lightning science and technology field.
Background technology
When in building, the equipment of an electrical system being carried out surge protection, usually two-stage or the surge protector more than the two-stage can be installed successively on a circuit, be called for short SPD.Each grade surge protector has different functions, and prime is mainly used to discharge the energy of lightning wave, and the back level is mainly used to clamp.Yet because each SPD operating characteristics and the inconsistency of response time; when surge is invaded, SPD at different levels not necessarily by the requirement of expection with is connected order and moves, its consequence is not reach predetermined protection effect; cause SPD self to damage when serious, in addition on fire from explosion.
The inter-stage energy of SPD cooperate require be: SPD at different levels separately locational surge voltage be restricted under the condition of expection level, each SPD can also bear dissipation when moving thereon maximum surge energy and safety still; Usually require prime SPD most of surge current of releasing, then the surge voltage on the level SPD major limitation equipment.
The basic condition that inter-stage SPD energy cooperates is the cooperation between two-stage SPD, the basic circuit model as shown in Figure 1, it is Zinc-oxide piezoresistor that the protection component of front and back level all adopts votage limit type MOV().
The analysis that two-stage SPD cooperates should be based on the voltage-current characteristic of two-stage MOV, and two MOV voltage-current characteristics directly in parallel as shown in Figure 2.Two-stage SPD also is connected on the circuit, and when this circuit of lightning surge intrusion, prime SPD should move earlier.But MOV is a nonlinear resistive element, if do not consider the impedance operator of inter-stage, in the process that surge voltage rises, SPD II lower in the MOV volt-ampere characteristic will be moved earlier, flow through bigger electric current, not according to predetermined SPD running order.If require the higher MOV that but is in prime of voltage-current characteristic at first to move, and flow through bigger electric current, just should seal in decoupling component at two inter-stages, improve the voltage between prime SPD I two ends, impel the action earlier of SPD I.
According to the regulation of IEC62305 standard, when multistage surge protector is installed, between the SPD decoupling component to be arranged, decoupling component has the impedance of circuit self or special-purpose decoupling component is installed.In the lightening protection engineering design of reality, multistage SPD is installed successively in the construction of engineering, but is difficult to realize.
Summary of the invention
Technical problem to be solved by this invention provides a kind of decoupling component composite type SPD that contains, and can satisfy the requirement of lightening protection engineering design specification, reaches the purpose that prevents that electronics, electric equipment from damaging because of surge.
The present invention is adopted following technical scheme by solving the problems of the technologies described above:
A kind of combined electrical surge protector that contains the LC decoupling component comprises composite type SPD and SPD operating status record device; Composite type SPD plays the effect that the lightning wave energy of invading is discharged over the ground, and SPD logging device is realized the effect of monitoring SPD operating state.
Described SPD operating status record device comprises MC-51 single-chip microcomputer, transducer I, transducer II, memory and LCD, the transducer I is connected with the MC-51 single-chip microcomputer is unidirectional respectively with the transducer II, LCD also is connected with the MC-51 single-chip microcomputer is unidirectional respectively with telecommunication, and memory is connected with the MC-51 single-chip microcomputer is two-way.
Described composite type SPD comprises five piezo-resistances, two decoupling inductance, two decoupling capacitances, three Thermal Cutoffs, the series circuit of the series circuit of first Thermal Cutoffs and first piezo-resistance, the 3rd Thermal Cutoffs and the 4th piezo-resistance and first decoupling capacitance, is connected in turn respectively between input positive line L line and the neutral line PE line from input; Second piezo-resistance, the 3rd piezo-resistance, second decoupling capacitance, be connected in turn respectively between neutral line PE and the negative line N from input; The series circuit of second Thermal Cutoffs and the 5th piezo-resistance is connected between input positive line L line and the negative line N; The second decoupling inductance is serially connected on the input positive line L between the first Thermal Cutoffs positive input terminal and the 3rd Thermal Cutoffs positive input terminal; The first decoupling inductance is serially connected on the negative line N between the second piezo-resistance negative output terminal and the 3rd piezo-resistance negative output terminal.
Beneficial effect of the present invention is as follows:
1. a design that contains the composite type SPD of LC decoupling component meets the designing requirement of IEC18802.1 and JB/ T10618-2006 standard.
2. this SPD has the big characteristics of discharge capacity, and the discharge capacity maximum can reach 120kA, and nominal discharge current is 60kA.
3. the current ratio of decoupling inductance front and back stages can reach the ratio of 5:1, has guaranteed that the first order is mainly used to release energy, and the function of clamp is mainly played in the second level.
4. the voltage protection level of SPD is low, and the voltage protection level reaches below the 1kV, and this mainly is because the cause that inductance L, capacitor C to the folding of lightning wave, the effect of reflection, make the wave head steepness of lightning wave reduce.
5. SPD operating status record device is monitored the operating state of SPD in real time, and writes down the situation of its work, and analysis provides reliable data support to lightning disturbance.
Description of drawings
Fig. 1 is the basic circuit model.
Fig. 2 is two MOV voltage-current characteristics directly in parallel.
Fig. 3 is the SPD theory diagram.
Fig. 4 is the schematic diagram of composite type SPD.
Fig. 5 is a SPD operating status record principle of device block diagram.
Fig. 6 is the schematic diagram of SPD operating status record device.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further details.
The theory diagram of a kind of composite type SPD that contains the LC decoupling component as shown in Figure 3.
The chief component of a kind of LC of containing decoupling component composite type SPD is made up of composite type SPD and SPD operating status record device two parts.The lightning wave energy that composite type SPD mainly plays invasion discharges over the ground, plays clamp between the L-N line.SPD logging device mainly realizes monitoring the operating state of SPD, comprises whether device is working properly, the time and the number of times of component failure, action, can also realize the long-range effect of reporting lost property to the authorities, the function of warning.
Below two big parts are described in detail:
(1) composite type SPD
The concrete part of composite type SPD is seen shown in Figure 4:
Operation principle process analysis procedure analysis: when lightning wave passes through positive input L, when negative input N line intrudes among the SPD, the value of lightning overvoltage reaches the first piezo-resistance MOV1, during the reference voltage of the second piezo-resistance MOV2 (reference voltage level is generally about 620V), the first piezo-resistance MOV1, the second piezo-resistance MOV2 will at first move, this is mainly used to the earth is discharged the energy of lightning current, the first piezo-resistance MOV1, residual voltage after the second piezo-resistance MOV2 action is generally about 1.8kV, remaining lightning wave energy will be added to the 3rd piezo-resistance MOV3 by the decoupling inductance, on the 4th piezo-resistance MOV4, make the 3rd piezo-resistance MOV3, the 4th piezo-resistance MOV4 action.The reference voltage of the 3rd piezo-resistance MOV3, the 4th piezo-resistance MOV4 is generally about 560V; these two piezo-resistance MOV3, MOV4 are mainly used to the clamp lightning overvoltage; make lower residual voltage value of its output; residual voltage after the 3rd piezo-resistance MOV3, the 4th piezo-resistance MOV4 action is generally about 1.0kV, with the protection electronic equipment that the back was connect.The first piezo-resistance MOV1, the second piezo-resistance MOV2, the 3rd piezo-resistance MOV3 and the 4th piezo-resistance MOV4 move under the effect of lightning overvoltage, and the earth is released energy, and this protected mode is called vertical protection.As the first piezo-resistance MOV1; the second piezo-resistance MOV2; the 3rd piezo-resistance MOV3; during the 4th piezo-resistance MOV4 action; because the inconsistency of these device parameters; it mainly is the inconsistency of response time; make input positive line L; there is higher moment potential difference (this moment potential difference be generally more than the 2.0kV) in negative line N line-to-line; when this high potential difference reaches the reference voltage (reference voltage of MOV5 is generally about 560V) of MOV5; the 5th piezo-resistance MOV5 action suppresses L to play; the effect of N line-to-line potential difference; residual voltage after the 5th piezo-resistance MOV5 action is generally about 1.0kV; this makes L; magnitude of voltage that access device is born of N line-to-line output, this protected mode is also referred to as cross-protection.Inductance L, capacitor C are as decoupling component, and its operation principle is the transmission feature according to lightning wave: lightning wave by series connection inductance and will produce the refraction and the wave reflection phenomenon of ripple during in parallel electric capacity.Inductance L, capacitor C mainly play and reduce the thunder and lightning wave steepness, make SPD export lower residual voltage to improve the protection effect of SPD under the effect of lightning wave.
(2) SPD operating status record device
Its operation principle block diagram is seen shown in Figure 5:
Circuit adopts basic MC-51 single chip circuit, and have transducer I, transducer II, single-chip microcomputer MC-51, compositions such as memory and liquid crystal display main the composition.
The transducer I is equivalent to Luo-coil; it is enclosed within on the neutral PE line of SPD; the Luo-coil two ends will induce a voltage when SPD moves under the lightning overvoltage effect; this voltage will go to trigger single-chip microcomputer work; count once, and the record time at that time, can be as accurate as year, month, day, hour, min, second; when thunder and lightning causes device damage, can access synoptic data at that time like this according to the time of record, whether play a protective role to analyze SPD.
The transducer II is a Thermal Cutoffs, and MOV is installed in series with piezo-resistance.When the long-term charged work of piezo-resistance MOV, because under the on-Line Voltage effect, the phenomenon that piezo-resistance MOV may occur wearing out, cause piezo-resistance MOV leakage current to become big heating, the Rt(Thermal Cutoffs) fusing finally makes piezo-resistance MOV and power supply disconnect, avoid occurring fire incident, this moment, piezo-resistance MOV lost the effect of lightning protection.Carry out telecommunication by single-chip microcomputer, inform that piezo-resistance MOV damages, obviously be provided with the Rt(Thermal Cutoffs of multichannel in the circuit).
Memory is mainly used to store the time of SPD action and the time data information that MOV lost efficacy.
Display is used for showing the operating state of SPD.
The schematic diagram of SPD operating status record device as shown in Figure 6.U1 is a single-chip microcomputer among the figure, and U2 is a memory, and U3 is a clock chip, and U4 is a photoelectrical coupler.When SPD moves because of the intrusion of lightning wave, Luo-coil will produce the pulse signal of induction, this signal is by the B1 rectifier bridge, the effect of B1 is to be used for carrying out reversal, make positive pulse signal of its output trigger photoelectrical coupler U4, the signal triggering single-chip microcomputer of U4 output, single-chip microcomputer with the signal storage of gathering in U2.LCD is a LCD, the information of displayed record.The effect of clock chip U3 is to provide a time signal to single-chip microcomputer.
Claims (3)
1. a combined electrical surge protector that contains the LC decoupling component is characterized in that comprising composite type SPD and SPD operating status record device; Composite type SPD plays the effect that the lightning wave energy of invading is discharged over the ground, and SPD logging device is realized the effect of monitoring SPD operating state.
2. a kind of combined electrical surge protector that contains the LC decoupling component according to claim 1; it is characterized in that described SPD operating status record device comprises MC-51 single-chip microcomputer, transducer I, transducer II, memory and LCD; the transducer I is connected with the MC-51 single-chip microcomputer is unidirectional respectively with the transducer II; LCD also is connected with the MC-51 single-chip microcomputer is unidirectional respectively with telecommunication, and memory is connected with the MC-51 single-chip microcomputer is two-way.
3. a kind of combined electrical surge protector that contains the LC decoupling component according to claim 1, it is characterized in that described composite type SPD comprises five piezo-resistance (MOV1, MOV2, MOV3, MOV4, MOV5), two decoupling inductance (L1, L2), two decoupling capacitance (C1, C2), three Thermal Cutoffs (Rt1, Rt2, Rt3), the series circuit of first Thermal Cutoffs (Rt1) and first piezo-resistance (MOV1), the series circuit of the 3rd Thermal Cutoffs (Rt3) and the 4th piezo-resistance (MOV4), and first decoupling capacitance (C1), be connected in turn respectively between input positive line L line and the neutral line PE line from input; Second piezo-resistance (MOV2), the 3rd piezo-resistance (MOV3), second decoupling capacitance (C2), be connected in turn respectively between neutral line PE and the negative line N from input; The series circuit of second Thermal Cutoffs (Rt2) and the 5th piezo-resistance (MOV5) is connected between input positive line L line and the negative line N; The second decoupling inductance (L2) is serially connected on the input positive line L between first Thermal Cutoffs (Rt1) positive input terminal and the 3rd Thermal Cutoffs (Rt3) positive input terminal; The first decoupling inductance (L1) is serially connected on the negative line N between second piezo-resistance (MOV2) negative output terminal and the 3rd piezo-resistance (MOV3) negative output terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105130836A CN102170119A (en) | 2010-10-20 | 2010-10-20 | Combined surge protection device (SPD) with LC (inductance-capacitance) decoupling element |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105130836A CN102170119A (en) | 2010-10-20 | 2010-10-20 | Combined surge protection device (SPD) with LC (inductance-capacitance) decoupling element |
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| CN102170119A true CN102170119A (en) | 2011-08-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812096A (en) * | 2012-11-14 | 2014-05-21 | 启碁科技股份有限公司 | Surge protection device |
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|---|---|---|---|---|
| US4901183A (en) * | 1988-08-29 | 1990-02-13 | World Products, Inc. | Surge protection device |
| US6288917B1 (en) * | 1998-01-20 | 2001-09-11 | Leveler | Three stage power conditioning circuit |
| CN101102041A (en) * | 2006-07-07 | 2008-01-09 | 王勇 | Surge protector with automatic monitoring function |
| CN201178306Y (en) * | 2008-03-11 | 2009-01-07 | 顾江山 | Surge protector for video, data and power supply |
| CN101599639A (en) * | 2008-06-06 | 2009-12-09 | 珠海市金宏辰新科技有限公司 | Single-phase power supply low-pass lightning arrester |
| CN201821094U (en) * | 2010-10-20 | 2011-05-04 | 南京信息工程大学 | Combined surge protective device provided with LC decoupling element |
-
2010
- 2010-10-20 CN CN2010105130836A patent/CN102170119A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4901183A (en) * | 1988-08-29 | 1990-02-13 | World Products, Inc. | Surge protection device |
| US6288917B1 (en) * | 1998-01-20 | 2001-09-11 | Leveler | Three stage power conditioning circuit |
| CN101102041A (en) * | 2006-07-07 | 2008-01-09 | 王勇 | Surge protector with automatic monitoring function |
| CN201178306Y (en) * | 2008-03-11 | 2009-01-07 | 顾江山 | Surge protector for video, data and power supply |
| CN101599639A (en) * | 2008-06-06 | 2009-12-09 | 珠海市金宏辰新科技有限公司 | Single-phase power supply low-pass lightning arrester |
| CN201821094U (en) * | 2010-10-20 | 2011-05-04 | 南京信息工程大学 | Combined surge protective device provided with LC decoupling element |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812096A (en) * | 2012-11-14 | 2014-05-21 | 启碁科技股份有限公司 | Surge protection device |
| CN103812096B (en) * | 2012-11-14 | 2016-05-11 | 启碁科技股份有限公司 | Surge protection means |
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Application publication date: 20110831 |