CN204882691U - Direct current busbar voltage check out test set - Google Patents
Direct current busbar voltage check out test set Download PDFInfo
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- CN204882691U CN204882691U CN201520629610.8U CN201520629610U CN204882691U CN 204882691 U CN204882691 U CN 204882691U CN 201520629610 U CN201520629610 U CN 201520629610U CN 204882691 U CN204882691 U CN 204882691U
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- voltage transmitter
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Abstract
The utility model relates to a voltage detecting technical field discloses a direct current busbar voltage check out test set, its characterized in that, this equipment includes: the DC voltage changer is connected to the dc bus is used for measuring the voltage of dc bus turns into the undercurrent signal with institute's measuring voltage, and monitoring devices, with the DC voltage changer is connected, is used for discernment corresponding magnitude of voltage is exported to the undercurrent signal. The utility model discloses a DC voltage changer turns into the undercurrent signal with the voltage of the dc bus that records to make the indirect magnitude of voltage that records the dc bus of monitoring devices, can realize the magnitude of voltage of the positive negative supply of real -time supervision through this kind of mode, especially still can monitor out the virtual voltage value of positive negative supply behind insulating the reduction, be convenient for monitor DC power supply's good nature.
Description
Technical field
The utility model relates to voltage detecting technology, particularly, relates to a kind of DC bus-bar voltage checkout equipment.
Background technology
Existing straight-flow system monitoring unit is insulating monitoring equipment, possesses DC earthing function for monitoring, but, existing monitoring equipment can only play DC earthing report to the police and insulation reduce after the function of reporting to the police, but can not Real-Time Monitoring insulation reduce after the actual voltage value of positive-negative power.
The function of all D.C. isolation monitoring systems of the prior art is identical, all there is above problem.Like this, if wish the safe operation ensureing distribution system, can only depend on and manually investigate on the spot, so not only can waste a large amount of human resources, also can bring certain danger to operating personnel.
Utility model content
The purpose of this utility model is to provide a kind of DC bus-bar voltage checkout equipment, reduces the magnitude of voltage of rear positive-negative power for solving monitoring insulation automatically.
To achieve these goals, the utility model provides a kind of DC bus-bar voltage checkout equipment, this equipment comprises: DC voltage transmitter, is connected to described DC bus, for measuring the voltage of described DC bus and be small area analysis signal by measured photovoltaic conversion; And monitoring device, be connected with described DC voltage transmitter, for identifying described small area analysis signal and exporting corresponding magnitude of voltage.
Preferably, this equipment comprises: two described DC voltage transmitters; Wherein, the first DC voltage transmitter in described two DC voltage transmitters is connected to the positive pole of described DC bus, for measuring the cathode voltage of described DC bus and measured cathode voltage being converted into positive pole small area analysis signal; The second DC voltage transmitter in described two DC voltage transmitters is connected to the negative pole of described DC bus, for measuring the cathode voltage of described DC bus and measured cathode voltage being converted into negative pole small area analysis signal; Described monitoring device is connected to described first DC voltage transmitter and described second DC voltage transmitter, for identifying described positive pole small area analysis signal and described negative pole small area analysis signal, and exports corresponding cathode voltage value and negative battery voltage respectively.
Preferably, the electrode input end of described first DC voltage transmitter is connected to the positive pole of described DC bus, the negative input ground connection of described first DC voltage transmitter; And the negative input of described second DC voltage transmitter is connected to the negative pole of described DC bus, the electrode input end ground connection of described second DC voltage transmitter.
Preferably, this equipment also comprises: display device, is connected with described monitoring device, for showing the magnitude of voltage that described monitoring device exports.
Preferably, described monitoring device is thermal technology DCS.
Preferably, this equipment also comprises: direct current air switch, is connected between described DC voltage transmitter and described DC bus, for switching on and off the connection between described DC voltage transmitter and described DC bus.
Preferably, this equipment also comprises: Switching Power Supply, be connected between AC power and described DC voltage transmitter power input, for being direct current by the AC conversion from described AC power, and provide described direct current for described DC voltage transmitter.
Preferably, this equipment also comprises: alternating current air switch, is connected between AC power and described Switching Power Supply, for switching on and off the connection between described Switching Power Supply and described AC power.
Pass through technique scheme, the photovoltaic conversion of measured DC bus is small area analysis signal by DC voltage transmitter by the utility model, with the magnitude of voltage making monitoring device indirectly record DC bus, the magnitude of voltage of Real-Time Monitoring positive-negative power can be realized in this way, especially after insulation reduces, still can monitor out the actual voltage value of positive-negative power, be convenient to the formedness of monitoring direct supply.
Other features and advantages of the utility model are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for instructions, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is the block diagram of the DC bus-bar voltage checkout equipment that the utility model provides; And
Fig. 2 is the structural drawing of the DC bus-bar voltage checkout equipment that the utility model embodiment provides.
Description of reference numerals
2011 first DC voltage transmitter 2,012 second DC voltage transmitters
202 monitoring device 203 display device
204 direct current air switch 205 Switching Power Supplies
206 alternating current air switchs
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
Fig. 1 is the block diagram of the DC bus-bar voltage checkout equipment that the utility model provides, and as shown in Figure 1, this equipment comprises DC voltage transmitter and monitoring device.Wherein, DC voltage transmitter is connected to DC bus, for measuring the voltage of DC bus and be small area analysis signal by measured photovoltaic conversion, monitoring device is connected with DC voltage transmitter, transforms the small area analysis signal that obtains for being identified by DC voltage transmitter and exporting corresponding magnitude of voltage.
Here, monitoring device can go out the magnitude of voltage of DC bus by small area analysis Signal analysis, be to be understood that, the photovoltaic conversion of measured DC bus is small area analysis signal by DC voltage transmitter, the voltage being input as 0 ~ 450V of DC voltage transmitter, output is the electric current of 4 ~ 20mA, and that is, DC voltage transmitter expresses the voltage of DC bus by small area analysis signal.Certainly, monitoring device need with DC voltage transmitter with the use of, at least should identify the small area analysis signal that DC voltage transmitter sends, that is, the magnitude of voltage of DC bus can be gone out by this small area analysis Signal analysis.
In order to can monitor the positive pole of DC bus and negative pole simultaneously, can be measured the positive pole of DC bus and negative pole respectively by two DC voltage transmitters.Fig. 2 is the structural drawing of the DC bus-bar voltage checkout equipment that the utility model embodiment provides, and as shown in Figure 2, this equipment comprises two DC voltage transmitters 2011,2012.The first DC voltage transmitter 2011 in these two DC voltage transmitters is connected to the positive pole of DC bus, for measuring the cathode voltage of DC bus (namely, positive pole voltage-to-ground) and measured cathode voltage is converted into positive pole small area analysis signal, the second DC voltage transmitter 2012 in these two DC voltage transmitters is connected to the negative pole of DC bus, for measuring the cathode voltage (that is, negative pole voltage-to-ground) of DC bus and measured cathode voltage being converted into negative pole small area analysis signal.Here positive pole voltage-to-ground and negative pole voltage-to-ground in order to distinguish DC bus pass through respectively through the small area analysis signal exported after the first DC voltage transmitter and the second DC voltage transmitter, the small area analysis signal that the first DC voltage transmitter being connected to DC bus positive pole exports is called positive pole small area analysis signal, and the small area analysis signal that the second DC voltage transmitter being connected to DC bus negative pole exports is called negative pole small area analysis signal.
Monitoring device 202 is connected to the first DC voltage transmitter 2011 and the second DC voltage transmitter 2012, for identifying the positive pole small area analysis signal that the first current/voltage transmitter 2011 exports and the negative pole small area analysis signal that the second DC voltage transmitter 2012 exports, and export cathode voltage value and the negative battery voltage of corresponding DC bus respectively.Monitoring device 202 can be realized by thermal technology DCS (dcs), and it receives the small area analysis signal of 4 ~ 20mA, exports the magnitude of voltage of DC bus.Certainly, the utility model is not limited thereto, and all devices that can realize the function of above monitoring device 202 are all within protection domain of the present utility model.
Wherein, at the first DC voltage transmitter 2011 for measuring the cathode voltage of DC bus, when second DC voltage transmitter 2012 is for measuring the cathode voltage of DC bus, its mode of connection is as follows: the electrode input end of the first DC voltage transmitter 2011 is connected to the positive pole of DC bus, the negative input ground connection of this first DC voltage transmitter 2011; The negative input of the second DC voltage transmitter 2012 is connected to the negative pole of DC bus, the electrode input end ground connection of this second DC voltage transmitter 2012.
As shown in Figure 2, the DC bus-bar voltage checkout equipment that the utility model provides can also comprise display device 203, this display device 203 is connected with monitoring device 202, for show monitoring device 202 the magnitude of voltage that exports, certainly, when measuring cathode voltage and the cathode voltage of DC bus respectively by the first DC voltage transmitter 2011 and the second DC voltage transmitter 2012, this display device 203 demonstrates the cathode voltage value and negative battery voltage that monitoring device 202 exports.
In order to the break-make between checkout equipment and DC bus can be controlled, the DC bus-bar voltage checkout equipment that the utility model provides can also comprise direct current air switch 204 (as shown in Figure 2), this direct current air switch 204 is connected between DC voltage transmitter (comprising the first DC voltage transmitter 2011 and the second DC voltage transmitter 2012 in Fig. 2) and DC bus, for switching on and off the connection between DC voltage transmitter and DC bus.
Those skilled in the art are to be understood that, need to provide direct supply can normally work to make it to DC voltage transmitter, thus, the DC bus-bar voltage checkout equipment that the utility model provides also comprises Switching Power Supply, this Switching Power Supply is connected between the power input of AC power and DC voltage transmitter, for being direct current by the AC conversion from AC power, and provide the direct current transforming and obtain for DC voltage transmitter.The alternating voltage being input as 220V of Switching Power Supply 205, exporting can the DC voltage of 24V needed for DC voltage transmitter.
In the embodiment shown in figure 2, the input end of Switching Power Supply 205 is connected to AC power, the output terminal of Switching Power Supply 205 is connected to the power input of the first DC voltage transmitter 2011 and the second DC voltage transmitter 2012, think that the first DC voltage transmitter 2011 and the second DC voltage transmitter 2012 provide working power, can normally work.
In order to the break-make of the power supply of DC voltage transmitter can be controlled, the DC bus-bar voltage checkout equipment that the utility model provides can also comprise alternating current air switch 206 (as shown in Figure 2), this alternating current air switch 206 is connected between AC power and Switching Power Supply 205, for switching on and off the connection between described Switching Power Supply and described AC power.Needs to DC voltage transmitter (as, first DC voltage transmitter 2011 or the second DC voltage transmitter 2012), monitoring device 202 etc. is when overhauling, just need by the connection between alternating current air switch 206 cut-off switch power supply 205 and AC power, DC voltage transmitter is quit work, thus can overhaul each device under the state of safety, certainly, now also connection between DC voltage transmitter and DC bus can be disconnected by direct current air switch 204.
Below preferred implementation of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible array mode.
The utility model is measured by the voltage of DC voltage transmitter to DC bus, achieve the voltage-to-ground that monitoring insulation reduces rear DC bus both positive and negative polarity well, and the trend of change in voltage can be obtained further, be convenient to fault analysis and judgement point and fault type.
In addition, also can carry out combination in any between various different embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (8)
1. a DC bus-bar voltage checkout equipment, is characterized in that, this equipment comprises:
DC voltage transmitter, is connected to described DC bus, for measuring the voltage of described DC bus and be small area analysis signal by measured photovoltaic conversion; And
Monitoring device, is connected with described DC voltage transmitter, for identifying described small area analysis signal and exporting corresponding magnitude of voltage.
2. equipment according to claim 1, is characterized in that, this equipment comprises:
Two described DC voltage transmitters;
Wherein, the first DC voltage transmitter in described two DC voltage transmitters is connected to the positive pole of described DC bus, for measuring the cathode voltage of described DC bus and measured cathode voltage being converted into positive pole small area analysis signal;
The second DC voltage transmitter in described two DC voltage transmitters is connected to the negative pole of described DC bus, for measuring the cathode voltage of described DC bus and measured cathode voltage being converted into negative pole small area analysis signal;
Described monitoring device is connected to described first DC voltage transmitter and described second DC voltage transmitter, for identifying described positive pole small area analysis signal and described negative pole small area analysis signal, and exports corresponding cathode voltage value and negative battery voltage respectively.
3. equipment according to claim 2, is characterized in that,
The electrode input end of described first DC voltage transmitter is connected to the positive pole of described DC bus, the negative input ground connection of described first DC voltage transmitter; And
The negative input of described second DC voltage transmitter is connected to the negative pole of described DC bus, the electrode input end ground connection of described second DC voltage transmitter.
4. equipment according to claim 1 and 2, is characterized in that, this equipment also comprises:
Display device, is connected with described monitoring device, for showing the magnitude of voltage that described monitoring device exports.
5. equipment according to claim 1, is characterized in that, described monitoring device is thermal technology dcs DCS.
6. equipment according to claim 1, is characterized in that, this equipment also comprises:
Direct current air switch, is connected between described DC voltage transmitter and described DC bus, for switching on and off the connection between described DC voltage transmitter and described DC bus.
7. equipment according to claim 6, is characterized in that, this equipment also comprises:
Switching Power Supply, is connected between AC power and described DC voltage transmitter power input, for being direct current by the AC conversion from described AC power, and provides described direct current for described DC voltage transmitter.
8. equipment according to claim 7, is characterized in that, this equipment also comprises:
Alternating current air switch, is connected between AC power and described Switching Power Supply, for switching on and off the connection between described Switching Power Supply and described AC power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520629610.8U CN204882691U (en) | 2015-08-19 | 2015-08-19 | Direct current busbar voltage check out test set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520629610.8U CN204882691U (en) | 2015-08-19 | 2015-08-19 | Direct current busbar voltage check out test set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204882691U true CN204882691U (en) | 2015-12-16 |
Family
ID=54827050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520629610.8U Active CN204882691U (en) | 2015-08-19 | 2015-08-19 | Direct current busbar voltage check out test set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204882691U (en) |
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2015
- 2015-08-19 CN CN201520629610.8U patent/CN204882691U/en active Active
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |