CN103475081A - Auxiliary working power supply for power distribution network control terminal - Google Patents
Auxiliary working power supply for power distribution network control terminal Download PDFInfo
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- CN103475081A CN103475081A CN2013104544999A CN201310454499A CN103475081A CN 103475081 A CN103475081 A CN 103475081A CN 2013104544999 A CN2013104544999 A CN 2013104544999A CN 201310454499 A CN201310454499 A CN 201310454499A CN 103475081 A CN103475081 A CN 103475081A
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Abstract
The invention relates to a direct-current auxiliary power supply for a power distribution network remote control terminal. The auxiliary working power supply for the power distribution network control terminal comprises rectifying circuits, three transformers are adopted to carry out voltage reduction on each phase of power supply of a three-phase four-wire alternating-current power supply, the transformer output ends of the three phases of power supplies are connected with the rectifying circuits respectively, the output ends of the three rectifying circuits are connected in parallel, and a voltage-stabilization power component supplies direct-current stabilized power supply output. The positive electrode output end of the rectifying electrical bridge of each rectifying circuit is connected with a working state output circuit to access a single-chip microcomputer system circuit, the voltage quality of three phases can be controlled and judged and whether phase-deficient operation occurs to a distribution transformer or not can be controlled and judged through the single-chip microcomputer system circuit, and results are output to a remote transmission unit chip. The auxiliary working power supply for the power distribution network control terminal is stable in output, reliable, capable of guaranteeing the normal and stable operation of the power distribution network control terminal, and meanwhile can monitor the voltage quality of the three phases and monitor whether phase-deficient operation occurs to the distribution transformer or not.
Description
Technical field
The present invention relates to a kind of DC auxiliary supply that adopts the monitor terminal of Long-distance Control to use for power distribution network.
Background technology
In distribution network automated control appliance, the operation characteristic of its control terminal, whether in optimum Working, depends on the back work power supply of control terminal.At present, the back work power supply of such monitor terminal, mostly be single-phase rectifier back work power supply and (adopt a power transformer, as be connected between the A-N of power supply), when mains side B, any phase phase shortage of C occur when, accessory power supply will be disintegrated, and can not guarantee that whole device normally moves, and even can cause the auxiliary disorder of monitor terminal or systemic breakdown.This obviously can not meet the work requirements of distribution system terminal monitoring equipment, can not guarantee the normal operation of monitoring system, is unfavorable for the development of Electrial Power Industrial Automation control technology.
Summary of the invention
The present invention is directed to the prior art deficiency, propose a kind of power distribution network control terminal accessory power supply, stable output, reliable, can guarantee the normal stable operation of power distribution network control terminal.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of power distribution network control terminal back work power supply, contain transformer, rectification circuit, contain three transformers (PT1, PT2, PT3), respectively each phase power supply of three-phase and four-line AC power is carried out to step-down, each phase power transformer output connects respectively a rectification circuit (ZD1, ZD2, ZD3), and described three rectification circuit output end parallel connections provide D.C. regulated power supply output by the voltage stabilizing power component.
Described power distribution network control terminal back work power supply, cathode output end at described three each road rectifier bridges of rectification circuit respectively is connected with an operating state output circuit, described operating state output circuit is comprised of diode, current-limiting resistance, divider resistance and filter capacitor, three groups of operating state output circuit outputs access a microcontroller system circuit through optical coupling isolation circuit, control and judge whether phase-deficient operation of three-phase voltage quality and distribution transformer by microcontroller system circuit, and output to teletransmission unit chip.
Described power distribution network control terminal back work power supply, microcontroller system circuit comprises microprocessor and peripheral circuit, and teletransmission unit chip adopts the wireless communication module of bidirectional transmit-receive, and described wireless communication module is connected by PORT COM with microprocessor.
The useful good effect of invention:
1, power distribution network control terminal accessory power supply of the present invention, can be comparatively economical, desirable for monitor terminal provides a kind of highly reliable monitor terminal back work power supply, can monitor whether phase-deficient operation of three-phase voltage quality and distribution transformer simultaneously.Described monitor terminal auxiliary power circuit is for by the three-phase and four-line AC power, through the DC voltage-stabilizing back work power supply of three transformer pressure-reducings, rectification; Described back work power circuit is an auxiliary DC voltage-stabilizing working power, and it through 3 power transformer step-down rectifier conversion outputs, supplies with the required power supply of each several part by the three-phase and four-line AC power.
2, power distribution network control terminal accessory power supply of the present invention, stable output, reliably, adopt 3 power transformer step-down rectifiers, when the mains side phase shortage occurs when, can not disintegrate accessory power supply, can guarantee the normal operation of the whole device of power distribution network control terminal, also due to this back work power circuit output end, be provided with the test point of three-phase voltage, can read each phase voltage to judge power supply state (as: three-phase voltage quality and distribution transformer whether phase-deficient operation) by microcontroller system circuit.
3, power distribution network control terminal accessory power supply of the present invention, output to the teletransmission unit by microcontroller system circuit by electrical quantity, realized back work power supply running state monitoring simultaneously.Controlled and to be calculated the whether electrical quantity such as phase-deficient operation output to teletransmission unit chip of three-phase voltage quality and distribution transformer by microcontroller system circuit, it is for realizing that distribution system automation controls the booster action that will play power distribution network control terminal back work power unit function.
The accompanying drawing explanation
Fig. 1 is back work power circuit schematic diagram of the present invention;
Fig. 2 is three-phase of the present invention (each phase) power work state-detection optical coupling isolation circuit;
Fig. 3 is Single Chip Microcomputer (SCM) system microcontroller circuit schematic diagram of the present invention.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
Referring to Fig. 1, the power distribution network control terminal back work power supply of the present embodiment, contain transformer, rectification circuit, utilize three transformer PT1, PT2, PT3(to mean with label 101,102,103 respectively in the drawings) respectively each phase power supply of three-phase and four-line AC power is carried out to step-down, each phase power transformer output connects respectively a rectification circuit, through rectifier bridge ZD1, ZD2, the ZD3 rectification of rectification circuit, and the DC voltage-stabilizing back work power supply of stable output; Three rectifier bridge ZD1, ZD2, the parallel connection of ZD3 output, form rectifying output circuit 104 in parallel, then by the voltage stabilizing power component, provides D.C. regulated power supply output, for providing the monitor terminal each several part required working power.
In figure, 105 mean the D.C. regulated power supply output.Because this back work power circuit adopts 3 power transformer step-down rectifiers, when the mains side phase shortage occurs, can not disintegrate accessory power supply, can guarantee the normal operation of whole device.
Referring to Fig. 1, Fig. 2, Fig. 3, the described power distribution network control terminal of the present embodiment back work power supply, difference from Example 1 is: (in Fig. 1, label 106 respectively to be connected with an operating state output circuit at the cathode output end of described three each road rectifier bridges of rectification circuit, 107,108), described operating state output circuit is comprised of diode, current-limiting resistance, divider resistance and filter capacitor, and three groups of operating state output circuit outputs are through optical coupling isolation circuit access microcontroller system circuit.
Microcontroller system circuit calculates and judges the whether electrical quantity such as phase-deficient operation of three-phase voltage quality and distribution transformer, and outputs to teletransmission unit chip.Because this back work power circuit output end is provided with the test point of three-phase voltage, therefore can read each phase voltage output by microcontroller system circuit, also can monitor whether phase-deficient operation of three-phase voltage quality and distribution transformer judge power supply state.
Claims (3)
1. a power distribution network control terminal back work power supply, contain transformer, rectification circuit, it is characterized in that: contain three transformers (PT1, PT2, PT3), respectively each phase power supply of three-phase and four-line AC power is carried out to step-down, each phase power transformer output connects respectively a rectification circuit (ZD1, ZD2, ZD3), and described three rectification circuit output end parallel connections provide D.C. regulated power supply output by the voltage stabilizing power component.
2. power distribution network control terminal back work power supply according to claim 1, it is characterized in that: the cathode output end at described three each road rectifier bridges of rectification circuit respectively is connected with an operating state output circuit, described operating state output circuit is comprised of diode, current-limiting resistance, divider resistance and filter capacitor, three groups of operating state output circuit outputs access a microcontroller system circuit through optical coupling isolation circuit, control and judge whether phase-deficient operation of three-phase voltage quality and distribution transformer by microcontroller system circuit, and output to teletransmission unit chip.
3. power distribution network control terminal back work power supply according to claim 2, it is characterized in that: described microcontroller system circuit comprises microprocessor and peripheral circuit, teletransmission unit chip adopts the wireless communication module of bidirectional transmit-receive, and described wireless communication module is connected by PORT COM with microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013104544999A CN103475081A (en) | 2013-09-30 | 2013-09-30 | Auxiliary working power supply for power distribution network control terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013104544999A CN103475081A (en) | 2013-09-30 | 2013-09-30 | Auxiliary working power supply for power distribution network control terminal |
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| CN103475081A true CN103475081A (en) | 2013-12-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201060514Y (en) * | 2007-05-12 | 2008-05-14 | 五洲明珠股份有限公司潍坊浩特电气分公司 | Three-phase smart card type electric energy meter for farm irrigation |
| US7397228B2 (en) * | 2006-01-12 | 2008-07-08 | International Business Machines Corporation | Programmable on-chip sense line |
| CN201479028U (en) * | 2009-08-13 | 2010-05-19 | 福建俊豪电子有限公司 | Direct current conversion circuit of three-phase power supply |
| CN202177958U (en) * | 2011-07-22 | 2012-03-28 | 李小萍 | Monitoring device of transformer |
| CN103197158A (en) * | 2013-03-26 | 2013-07-10 | 深圳市英威腾电气股份有限公司 | Three-phase power grid phase loss detection method and circuit |
| CN203504270U (en) * | 2013-09-30 | 2014-03-26 | 河南开启电力实业有限公司 | Auxiliary working power supply of control terminal of power distribution network |
-
2013
- 2013-09-30 CN CN2013104544999A patent/CN103475081A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7397228B2 (en) * | 2006-01-12 | 2008-07-08 | International Business Machines Corporation | Programmable on-chip sense line |
| CN201060514Y (en) * | 2007-05-12 | 2008-05-14 | 五洲明珠股份有限公司潍坊浩特电气分公司 | Three-phase smart card type electric energy meter for farm irrigation |
| CN201479028U (en) * | 2009-08-13 | 2010-05-19 | 福建俊豪电子有限公司 | Direct current conversion circuit of three-phase power supply |
| CN202177958U (en) * | 2011-07-22 | 2012-03-28 | 李小萍 | Monitoring device of transformer |
| CN103197158A (en) * | 2013-03-26 | 2013-07-10 | 深圳市英威腾电气股份有限公司 | Three-phase power grid phase loss detection method and circuit |
| CN203504270U (en) * | 2013-09-30 | 2014-03-26 | 河南开启电力实业有限公司 | Auxiliary working power supply of control terminal of power distribution network |
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Application publication date: 20131225 |
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