CN103499790A - Online detection device for switching-on/off state of power distribution network - Google Patents
Online detection device for switching-on/off state of power distribution network Download PDFInfo
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- CN103499790A CN103499790A CN201310454634.XA CN201310454634A CN103499790A CN 103499790 A CN103499790 A CN 103499790A CN 201310454634 A CN201310454634 A CN 201310454634A CN 103499790 A CN103499790 A CN 103499790A
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- state
- switching
- circuit
- power distribution
- distribution network
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- 238000001514 detection method Methods 0.000 title abstract description 9
- 238000002955 isolation Methods 0.000 claims abstract description 10
- 229910004682 ON-OFF Inorganic materials 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 21
- 238000005516 engineering process Methods 0.000 claims description 8
- 230000002093 peripheral Effects 0.000 claims description 5
- 230000002457 bidirectional Effects 0.000 claims description 3
- 238000010295 mobile communication Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000003068 static Effects 0.000 description 2
- 206010069870 Device damage Diseases 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N Sulfur hexafluoride Chemical compound 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Abstract
The invention relates to an online detection device for a switching-on/off state of a power distribution network. The online detection device for the switching-on/off state of the power distribution network comprises a switching-on/off state detection sensor and a single chip microcomputer system circuit, wherein the switching-on/off state detection sensor is respectively connected with the lower end of a circuit breaker by three paths of voltage signal acquisition circuits; three paths of measured output voltage signals are respectively switched into an optical-coupling isolation module by a current-limiting resistor and a unidirectional protection diode; the optical-coupling isolation module is respectively connected with an I/O (Input/Output) input port of a single chip microcomputer in the single chip microcomputer system unit; and the single chip microcomputer system circuit controls to calculate a switching-on/off state electric parameter and outputs the electric parameter to a remote transmission unit. The online detection device for the switching-on/off state of a power distribution transformer provided by the invention can more economically and ideally realize online detection and uploading of the switching-on/off state of the power distribution transformer; and the auxiliary effect of a partial function of the online detection of the switching-on/off state of the lightning arrester of the power distribution transformer is acted on automatic control of a power distribution system.
Description
Technical field
The present invention relates to a kind of for the composition of Switching State of Distribution Network on-line measuring device.
Background technology
Along with developing rapidly of power industry, the process of distribution system automation control technology is further accelerated.But the realization of distribution system automation control technology, the automatically-monitored of infrastructure device of must take is basis.And the power distribution network switch is as the widely used basic device of distribution system, its duty has directly determined the operation of distribution system.Therefore, its operating mode is monitored, contributed to the robotization control and management of distribution system.
The confirmation of composition of Switching State of Distribution Network, be divided into two kinds, and a kind of is the switchgear that obvious cut-off point is arranged, as high pressure isolated operation switch, fuse switch (also claim zero can), low voltage isolation switch, low-voltage knife switch or switch with knifeshaped fuse, Low voltage knife switch etc.A kind of is the obviously switchgear of cut-off point of nothing, as primary cut-out, sulfur hexafluoride breaker, and low-voltage circuit breaker or A.C. contactor, automatic switch, with no pressure contactor etc.Latter's device for switching is in actual motion, and because on off state does not understand, in operation transmission or not process, its on off state of living in (being the position of disjunction of living in or connection) is extremely important.For example: when wish has a power failure, if because of certain primary cut-out or low-voltage circuit breaker fault (upper and lower dynamic and static contact adhesion), will cause the operation that has a power failure unsuccessful; While wanting power transmission, if because of certain primary cut-out or low-voltage circuit breaker fault (upper and lower dynamic and static contact is bad), will cause the power transmission operation unsuccessful.Particularly adopt the even more important of Long-distance Control mode.
At present, this switch electric fault phenomenon is not also had to ripe monitoring technology.After fault occurs, just know the harm that on off state causes often.Such power distribution network running status, will certainly cause power supply reliability poor, and the device damage rate is high.Therefore, how to realize that the real-time online of on off state detects, accomplish to prevent trouble before it happens, become current problem demanding prompt solution.
Summary of the invention
The present invention is directed to the problem that background technology proposes, propose a kind of simple in structurely, the on off state on-line measuring device that operation characteristic is more satisfactory, contribute to improve power supply reliability.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of composition of Switching State of Distribution Network on-line measuring device; comprise: on off state detecting sensor and microcontroller system circuit; described on off state sensor adopts three tunnel voltage signal acquisition circuit to be connected to the isolating switch lower end; record the three-phase output voltage signal respectively by current-limiting resistance and unidirectional protection diode access light-coupled isolation module; an I/O input port that connects respectively single-chip microcomputer in microcontroller system circuit by the light-coupled isolation module, controlled and calculated the on off state electrical quantity and output to the teletransmission unit by microcontroller system circuit.
Described composition of Switching State of Distribution Network on-line measuring device, microcontroller system circuit comprises core CPU module, peripheral circuit and communication module, in the core CPU module, the serial communication interface of single-chip microcomputer connects the uplink communication module, communication module adopts RS-485 bus communication mode, or adopts CAN bus or BUS bus communication mode.
Described composition of Switching State of Distribution Network on-line measuring device, described microcontroller system circuit comprises core CPU module, peripheral circuit, the teletransmission unit adopts the MANET wireless communication module based on wireless technology or the mobile communication module of bidirectional transmit-receive.
The useful good effect of invention:
1, substation transformer switch state detector of the present invention, can be comparatively economic, the desirable substation transformer on off state of realizing detects online and uploads, and it is for realizing that distribution system automation controls the booster action that will play the online test section of substation transformer on off state function.
2, substation transformer switch state detector of the present invention, simple in structure, cost is low, easily realizes, and easy to use, it is applied, and contributes to improve the Automation of Electric Systems level of control, improves power supply quality.
The accompanying drawing explanation
Fig. 1 is on off state detecting sensor scheme of installation of the present invention;
Fig. 2 is voltage signal acquisition optical coupling isolation circuit schematic diagram;
Fig. 3 is switch state detector microcontroller system circuit schematic diagram of the present invention.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
embodiment 1
As Fig. 1, 2, Fig. 3, composition of Switching State of Distribution Network on-line measuring device of the present invention, comprise on off state detecting sensor and microcontroller system circuit, described on off state sensor 102 adopts three tunnel voltage signal acquisition circuit to be connected to isolating switch 101 lower ends, record the three-phase output voltage signal respectively by current-limiting resistance and unidirectional protection diode access light-coupled isolation module, an I/O input port that connects respectively single-chip microcomputer in microcontroller system circuit by the light-coupled isolation module, control and calculate the on off state electrical quantity and output to the teletransmission unit by microcontroller system circuit.
The output signal end of number in the figure 103 representation switch state sensors 102.
Wherein, microcontroller system circuit comprises core CPU module, peripheral circuit and communication module, in the core CPU module, the serial communication interface of single-chip microcomputer connects the uplink communication module, and communication module adopts RS-485 bus communication mode, or adopts CAN bus or BUS bus communication mode.
Be connected with when prison storage module with described single-chip microcomputer, keep with the preservation that realizes the on off state recorded information and the preservation of running parameter.
Embodiment 2
The composition of Switching State of Distribution Network on-line measuring device of the present embodiment, as different from Example 1: the teletransmission unit adopts the MANET wireless communication module based on wireless technology of bidirectional transmit-receive or adopts the mobile communication module.On off state sensor 102 is for the online detection of on off state, and microcontroller system circuit is controlled and calculated the on off state electrical quantity and output to the teletransmission unit.
Claims (3)
1. a composition of Switching State of Distribution Network on-line measuring device; comprise: on off state detecting sensor and microcontroller system circuit; it is characterized in that: described on off state sensor adopts three tunnel voltage signal acquisition circuit to be connected to the isolating switch lower end; record the three-phase output voltage signal respectively by current-limiting resistance and unidirectional protection diode access light-coupled isolation module; an I/O input port that connects respectively single-chip microcomputer in microcontroller system circuit by the light-coupled isolation module, controlled and calculated the on off state electrical quantity and output to the teletransmission unit by microcontroller system circuit.
2. composition of Switching State of Distribution Network on-line measuring device according to claim 1, it is characterized in that: described microcontroller system circuit comprises core CPU module, peripheral circuit and communication module, in the core CPU module, the serial communication interface of single-chip microcomputer connects the uplink communication module, communication module adopts RS-485 bus communication mode, or adopts CAN bus or BUS bus communication mode.
3. composition of Switching State of Distribution Network on-line measuring device according to claim 1, it is characterized in that: described microcontroller system circuit comprises core CPU module, peripheral circuit, and the teletransmission unit adopts the MANET wireless communication module based on wireless technology or the mobile communication module of bidirectional transmit-receive.
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| CN201310454634.XA CN103499790A (en) | 2013-09-30 | 2013-09-30 | Online detection device for switching-on/off state of power distribution network |
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| CN201310454634.XA CN103499790A (en) | 2013-09-30 | 2013-09-30 | Online detection device for switching-on/off state of power distribution network |
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