CN104393682A - Low-voltage power failure monitoring terminal and low-voltage circuit board - Google Patents
Low-voltage power failure monitoring terminal and low-voltage circuit board Download PDFInfo
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- CN104393682A CN104393682A CN201410710704.8A CN201410710704A CN104393682A CN 104393682 A CN104393682 A CN 104393682A CN 201410710704 A CN201410710704 A CN 201410710704A CN 104393682 A CN104393682 A CN 104393682A
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Abstract
The invention discloses a low-voltage power failure monitoring terminal for monitoring power failure condition of three-phase voltage of a power distribution circuit so as to remind a remote main station system of power failure information. The low-voltage power failure monitoring terminal comprises a power supply and a power supply management circuit, wherein the power supply is used for acquiring phase voltage of the power distribution circuit and providing a working voltage for a functional board of the low-voltage power failure monitoring terminal; the power supply management circuit is mounted between the power supply and the functional board and used for controlling the power supply to charge and discharge the functional board; the power supply management circuit consists of a super capacitor C1, a constant-current charging circuit S1 and a switch transistor D1, wherein when the power distribution circuit in a power distribution room is powered on or powered off, the super capacitor C1 is respectively charged and discharged to support power supply for work of the functional boar; the constant-current charging circuit S1 is used for providing constant-current charging current o the super capacitor C1; the switch transistor D1 is used for preventing generation of a ring current loop. The invention also discloses a low-voltage circuit board.
Description
Technical field
The embodiment of the present invention relates to a kind of low pressure blackouts monitoring terminal be supported in without report and alarm during externally fed.
Background technology
In distribution repairing work, the fault of nearly 70% is from low pressure 380V side, and be the position that cannot judge that low pressure has a power failure by current monitoring means, power office cannot understand the power-off condition of low-voltage customer in time, after receiving customer complaint, often just know that this user has a power failure, thus reduce service quality, increase the rate of complaints of user.
For understanding the blackout condition of low-voltage customer in time, usually can install distribution transformer monitoring terminal at low-voltage customer end, the stand-by power supply utilizing it built-in realizes power-off fault and reports to the police.Now conventional stand-by power supply is chargeable lithium cell or Ni-MH battery.But due to the impact of unreasonable, the ambient temperature of battery management circuit and its shelf-life of battery limited, after 1 ~ 2 year, the capacity of this battery is by large high attenuation, even cannot support that public transformer terminals continues the operation of 1 ~ 5 minute, also just have impact on the realization of distribution transformer monitoring terminal function.Therefore existing management system requires just to need every 1 ~ 2 year to change reserve battery, and this adds maintenance workload on the one hand, also considerably increases maintenance cost on the other hand.
In addition, the nominal operating temperature scope of Ni-MH battery and lithium battery only has-20 DEG C-60 DEG C, under summer high temperature condition, outdoor on-the-spot temperature will exceed this nominal operating temperature scope, under some harsh conditions, lithium battery can produce the situations such as high temperature bulge even bursts, thus greatly have impact on the safety in utilization of distribution transformer monitoring terminal.
On the other hand, distribution transformer monitoring terminal cost is higher, and volume is comparatively large, generally can only be arranged on distribution transformer side, cannot be arranged on the table case place of corridor.Therefore can only manage the power supply situation in whole district, cannot manage the even each user of each corridor, its management intensity cannot meet the requirement of taking the initiative in offering a hand.
Summary of the invention
Low pressure blackouts monitoring terminal, for monitoring distribution line three-phase voltage power-down conditions to be prompted to far-end main station system power down information, comprise the power supply for obtaining distribution line phase piezoelectric voltage, for the feature board of described low pressure blackouts monitoring terminal provides operating voltage, it comprises the electric power management circuit be installed between described power supply and feature board further, for controlling the charging and discharging of described power supply to feature board, described electric power management circuit is by ultracapacitor C1, constant-current charging circuit S1 and switching transistor D1 forms, wherein when platform district distribution line powers on power down, ultracapacitor C1 carries out charging and discharging respectively, the working power of support function plate, by constant-current charging circuit S1 for ultracapacitor C1 provides constant current charge electric current, prevent that electric current loop flows back to road by switching transistor D1.
In one embodiment, described switching transistor D1 is set to multilevel diode, to be configured to the output voltage of ultracapacitor C1, lower than supply voltage, make to be powered to described feature board by main power source when platform district distribution line powers on.
In one embodiment, described constant-current charging circuit comprises a clamp circuit connected between described power supply and ultracapacitor C1, is configured to will be supplied to the Current Control of described ultracapacitor C1 at steady state value when saltus step appears in platform district distribution line.
In another embodiment, provide a kind of low-voltage circuit plate, connect distribution line three-phase voltage, comprising: the power panel connecting distribution line three-phase voltage, is converted to low-voltage power supply voltage by three phase mains; Feature board, for monitoring distribution line three-phase voltage power-down conditions to be prompted to far-end main station system power down information; And the auxiliary electrical source plate be connected between described power supply and feature board, its feeder ear P connects the output Vdc of power panel, and zero line side N connects the earth terminal GND of power panel, and this auxiliary electrical source plate controls the charging and discharging of described power supply to feature board.
In one embodiment, described auxiliary electrical source plate is made up of ultracapacitor C1, constant-current charging circuit S1 and switching transistor D1, wherein when platform district distribution line powers on power down, ultracapacitor C1 carries out charging and discharging respectively, the working power of support function plate, by constant-current charging circuit S1 for ultracapacitor C1 provides constant current charge electric current, prevent that electric current loop flows back to road by switching transistor D1.
In one embodiment, the capacity of described ultracapacitor C1 is different according to the power consumption of feature board and change.
In another embodiment, low pressure blackouts monitoring terminal, for monitoring distribution line three-phase voltage power-down conditions to be prompted to far-end main station system power down information, comprise the power supply for obtaining distribution line phase piezoelectric voltage, for the feature board of described low pressure blackouts monitoring terminal provides operating voltage, comprise further: be installed in the electric power management circuit between described power supply and feature board, for controlling the charging and discharging of described power supply to feature board; And communication ends, connected by ad Hoc wireless network and far-end main station system.
In one embodiment, described electric power management circuit is made up of ultracapacitor C1, constant-current charging circuit S1 and switching transistor D1, wherein when platform district distribution line powers on power down, ultracapacitor C1 carries out charging and discharging respectively, the working power of support function plate, by constant-current charging circuit S1 for ultracapacitor C1 provides constant current charge electric current, prevent that electric current loop flows back to road by switching transistor D1.In one embodiment, the capacity of described ultracapacitor C1 is different according to the power consumption of low pressure blackouts monitoring terminal and change.
Low pressure blackouts monitoring terminal of the present invention has abandoned Ni-MH battery or the lithium battery of distribution transformer monitoring terminal, with super capacitor for it.Super capacitor be a kind of between traditional capacitor and battery, there is the power supply of property, mainly rely on electric double layer and redox capacitance charge store electrical energy.But chemical reaction does not occur in the process of its energy storage, this thermal energy storage process is reversible.Therefore super capacitor has the obvious advantages such as power density is high, the discharge and recharge time is short, have extended cycle life, operating temperature range is wide.
Super capacitor is replaced chargeable lithium cell, Ni-MH battery by the present invention, there is the following advantage: (1) substantially increases the useful life of low pressure blackouts monitoring terminal supplying power, achieve the really non-maintaining of stand-by power supply, thus significantly reduce workload and the maintenance cost of public transformer terminals on-site maintenance; (2) improve the operating temperature range of low pressure blackouts monitoring terminal, the nominal operating temperature of super capacitor can reach-25 DEG C ~ 60 DEG C, and there is not the problems such as high temperature bulge explosion, thus substantially increases the safety in operation of low pressure blackouts monitoring terminal.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of low pressure blackouts monitoring terminal of the present invention.
Embodiment
With reference to Fig. 1, low pressure blackouts monitoring terminal is for monitoring distribution line three-phase voltage power-down conditions to be prompted to far-end main station system power down information, comprise the power supply 1 for obtaining distribution line phase piezoelectric voltage, for the feature board 2 of described low pressure blackouts monitoring terminal provides operating voltage Vdc, it comprises the electric power management circuit be installed between described power supply 1 and feature board 2 further, for controlling the charging and discharging of described power supply to feature board.
In one embodiment, described electric power management circuit is made up of ultracapacitor C1, constant-current charging circuit S1 and switching transistor D1, wherein when platform district distribution line powers on power down, ultracapacitor C1 carries out charging and discharging respectively, the working power of support function plate, by constant-current charging circuit S1 for ultracapacitor C1 provides constant current charge electric current, prevent that electric current loop flows back to road by switching transistor D1, wherein:
Ultracapacitor (C1): the energy supporting low pressure blackouts monitoring terminal operating after having a power failure in order to storage bed district distribution line, the capacity of ultracapacitor (C1) need be determined by the power consumption of low pressure blackouts monitoring terminal, requires that Neng Tai district at least can support low pressure blackouts monitoring terminal operating 1 minute after having a power failure;
Constant-current charging circuit (S1): for super capacitor provides constant charge current, the impulse current excessive normal operation affecting low pressure blackouts monitoring terminal when avoiding electrical network distribution line to power on;
Parallel diode (D1): realization is in parallel with power supply 1, avoids the circulation of generation current.In actual use, D1 can be formed by multiple Diode series, makes ultracapacitor output voltage a little less than main power source, to ensure to be powered by main power source under normal circumstances.
In one embodiment, described switching transistor D1 is set to multilevel diode, to be configured to the output voltage of ultracapacitor C1, lower than supply voltage, make to be powered to described feature board by main power source when platform district distribution line powers on.
In one embodiment, described constant-current charging circuit comprises a clamp circuit connected between described power supply and ultracapacitor C1, is configured to will be supplied to the Current Control of described ultracapacitor C1 at steady state value when saltus step appears in platform district distribution line.
In another embodiment, provide a kind of low-voltage circuit plate, connect distribution line three-phase voltage, comprising: the power panel connecting distribution line three-phase voltage, is converted to low-voltage power supply voltage by three phase mains; Feature board, for monitoring distribution line three-phase voltage power-down conditions to be prompted to far-end main station system power down information; And the auxiliary electrical source plate be connected between described power supply and feature board, its feeder ear P connects the output Vdc of power panel, and zero line side N connects the earth terminal GND of power panel, and this auxiliary electrical source plate controls the charging and discharging of described power supply to feature board.
In one embodiment, described auxiliary electrical source plate is made up of ultracapacitor C1, constant-current charging circuit S1 and switching transistor D1, wherein when platform district distribution line powers on power down, ultracapacitor C1 carries out charging and discharging respectively, the working power of support function plate, by constant-current charging circuit S1 for ultracapacitor C1 provides constant current charge electric current, prevent that electric current loop flows back to road by switching transistor D1.
In one embodiment, the capacity of described ultracapacitor C1 is different according to the power consumption of feature board and change.In another embodiment, low pressure blackouts monitoring terminal, for monitoring distribution line three-phase voltage power-down conditions to be prompted to far-end main station system power down information, comprise the power supply for obtaining distribution line phase piezoelectric voltage, for the feature board of described low pressure blackouts monitoring terminal provides operating voltage, comprise further: be installed in the electric power management circuit between described power supply and feature board, for controlling the charging and discharging of described power supply to feature board; And communication ends, connected by ad Hoc wireless network and far-end main station system.
In one embodiment, described electric power management circuit is made up of ultracapacitor C1, constant-current charging circuit S1 and switching transistor D1, wherein when platform district distribution line powers on power down, ultracapacitor C1 carries out charging and discharging respectively, the working power of support function plate, by constant-current charging circuit S1 for ultracapacitor C1 provides constant current charge electric current, prevent that electric current loop flows back to road by switching transistor D1.As shown in Figure 1, low pressure blackouts monitoring office terminal is inner, the P end of the management of charging and discharging module of super capacitor is connected with the output Vdc of main power source, N end is connected with the ground GND of main power source, input supply terminal BK holds with the Vcc of power supply 1 and is connected, thus achieves the management of charging and discharging module of ultracapacitor C1 and use with the in parallel of main power source.After the power-up, first power supply 1 is charged to super capacitor (C1) by constant-current charging circuit (S1).After Er Tai district distribution line has a power failure, then ultracapacitor (C1) is by the power supply of diode (D1) realization to low pressure blackouts monitoring office terminal feature board.
In one embodiment, the capacity of described ultracapacitor C1 is different according to the power consumption of low pressure blackouts monitoring terminal and change.
Low pressure blackouts monitoring terminal and far-end distribution management main station system with the use of, low pressure blackouts monitoring terminal Real-Time Monitoring three-phase phase voltage, once find that there is a phase or ployphase voltages dead electricity, then the timely power failure state by electricity consumption scene reports distribution management main station system.Distribution management main station system, according to the information of low pressure blackouts monitoring terminal uplink, realizes fault location in conjunction with distribution topological analysis.And failure analysis result is carried out issuing and keeping in repair send work, realize taking the initiative in offering a hand.
Claims (9)
1. low pressure blackouts monitoring terminal, for monitoring distribution line three-phase voltage power-down conditions to be prompted to far-end main station system power down information, comprise the power supply for obtaining distribution line phase piezoelectric voltage, for the feature board of described low pressure blackouts monitoring terminal provides operating voltage, it is characterized in that comprising the electric power management circuit be installed between described power supply and feature board further, for controlling the charging and discharging of described power supply to feature board, described electric power management circuit is by ultracapacitor C1, constant-current charging circuit S1 and switching transistor D1 forms, wherein when platform district distribution line powers on power down, ultracapacitor C1 carries out charging and discharging respectively, the working power of support function plate, by constant-current charging circuit S1 for ultracapacitor C1 provides constant current charge electric current, prevent that electric current loop flows back to road by switching transistor D1.
2. low pressure blackouts monitoring terminal according to claim 1, it is characterized in that: described switching transistor D1 is set to multilevel diode, to be configured to the output voltage of ultracapacitor C1, lower than supply voltage, make to be powered to described feature board by main power source when platform district distribution line powers on.
3. low pressure blackouts monitoring terminal according to claim 2, it is characterized in that: described constant-current charging circuit comprises a clamp circuit connected between described power supply and ultracapacitor C1, is configured to will be supplied to the Current Control of described ultracapacitor C1 at steady state value when saltus step appears in platform district distribution line.
4. low-voltage circuit plate, connects distribution line three-phase voltage, it is characterized in that comprising:
Connect the power panel of distribution line three-phase voltage, three phase mains is converted to low-voltage power supply voltage;
Feature board, for monitoring distribution line three-phase voltage power-down conditions to be prompted to far-end main station system power down information; And
Be connected to the auxiliary electrical source plate between described power supply and feature board, its feeder ear P connects the output Vdc of power panel, and zero line side N connects the earth terminal GND of power panel, and this auxiliary electrical source plate controls the charging and discharging of described power supply to feature board.
5. low-voltage circuit plate according to claim 4, it is characterized in that: described auxiliary electrical source plate is made up of ultracapacitor C1, constant-current charging circuit S1 and switching transistor D1, wherein when platform district distribution line powers on power down, ultracapacitor C1 carries out charging and discharging respectively, the working power of support function plate, by constant-current charging circuit S1 for ultracapacitor C1 provides constant current charge electric current, prevent that electric current loop flows back to road by switching transistor D1.
6. low-voltage circuit plate according to claim 5, is characterized in that: the capacity of described ultracapacitor C1 is different according to the power consumption of feature board and change.
7. low pressure blackouts monitoring terminal, for monitoring distribution line three-phase voltage power-down conditions to be prompted to far-end main station system power down information, comprise the power supply for obtaining distribution line phase piezoelectric voltage, for the feature board of described low pressure blackouts monitoring terminal provides operating voltage, it is characterized in that comprising further: be installed in the electric power management circuit between described power supply and feature board, for controlling the charging and discharging of described power supply to feature board; And communication ends, connected by ad Hoc wireless network and far-end main station system.
8. low pressure blackouts monitoring terminal according to claim 7, it is characterized in that: described electric power management circuit is made up of ultracapacitor C1, constant-current charging circuit S1 and switching transistor D1, wherein when platform district distribution line powers on power down, ultracapacitor C1 carries out charging and discharging respectively, the working power of support function plate, by constant-current charging circuit S1 for ultracapacitor C1 provides constant current charge electric current, prevent that electric current loop flows back to road by switching transistor D1.
9. low pressure blackouts monitoring terminal according to claim 7, is characterized in that: the capacity of described ultracapacitor C1 is different according to the power consumption of low pressure blackouts monitoring terminal and change.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710704.8A CN104393682A (en) | 2014-11-28 | 2014-11-28 | Low-voltage power failure monitoring terminal and low-voltage circuit board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410710704.8A CN104393682A (en) | 2014-11-28 | 2014-11-28 | Low-voltage power failure monitoring terminal and low-voltage circuit board |
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| CN104393682A true CN104393682A (en) | 2015-03-04 |
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| CN201410710704.8A Pending CN104393682A (en) | 2014-11-28 | 2014-11-28 | Low-voltage power failure monitoring terminal and low-voltage circuit board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105119378A (en) * | 2015-09-09 | 2015-12-02 | 国网浙江省电力公司湖州供电公司 | Low-voltage power distribution line on-line monitoring system |
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| JP2012085460A (en) * | 2010-10-13 | 2012-04-26 | National Institute Of Advanced Industrial & Technology | High-voltage/low-voltage distribution system voltage regulation system |
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| CN201682417U (en) * | 2010-04-29 | 2010-12-22 | 湖南文理学院 | Power supply protection circuit based on super capacitor |
| JP2012085460A (en) * | 2010-10-13 | 2012-04-26 | National Institute Of Advanced Industrial & Technology | High-voltage/low-voltage distribution system voltage regulation system |
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Application publication date: 20150304 |