CN208705386U - Voltage signal measuring equipment and system - Google Patents
Voltage signal measuring equipment and system Download PDFInfo
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- CN208705386U CN208705386U CN201821283315.1U CN201821283315U CN208705386U CN 208705386 U CN208705386 U CN 208705386U CN 201821283315 U CN201821283315 U CN 201821283315U CN 208705386 U CN208705386 U CN 208705386U
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Abstract
The utility model provides a kind of voltage signal measuring equipment and system.The measuring equipment includes three single-phase acquisition units, multiple signal sampling units and multiple voltage measurement units；The single-phase incoming end of three single-phase acquisition units distinguishes external first high pressure phase line, the second high pressure phase line and third high pressure phase line, and the zero curve incoming end of three single-phase acquisition units is connected with each other and external zero curve, for acquiring the single-phase voltage signal of each high pressure phase line；Each voltage measurement unit connects three signal sampling units, three signal sampling units corresponding to same voltage measurement unit are connect with the single-phase output end of three single-phase acquisition units respectively, the ground terminal of each single-phase acquisition unit is grounded, to measure to the single-phase voltage signal after sampling.The measuring equipment it is low in cost, strong antijamming capability and measuring accuracy are high, can pass through voltage signal all the way and realize multiple metering.
Description
Technical field
The utility model relates to voltage measurement technical fields, in particular to a kind of voltage signal measuring equipment and are
System.
Background technique
Currently available technology realization generallys use two ways to the multiple metering of voltage signal, electric all the way one is using
Pressure signal multiple metering is realized to the method mode measured all the way, one is use the voltage signal all the way of star-like connection to multichannel meter
The mode of amount realizes multiple metering.But the former mode in two ways needs multiple electricity during realizing multiple metering
Mutual inductor and biggish PCB (Printed Circuit Board, printed circuit board) layout area are pressed, although ensure that metering
Precision but higher cost.And cost is relatively low but anti-interference ability is not strong for latter approach, during realizing multiple metering
It usually will cause there are maximum error between final metric results and actual result, whole measuring accuracy is low.
Utility model content
In order to overcome above-mentioned deficiency in the prior art, the purpose of this utility model is to provide a kind of meterings of voltage signal
Equipment and system, cost is relatively low for the voltage signal measuring equipment, and strong antijamming capability and measuring accuracy height can pass through one
Road voltage signal realizes the multiple metering to voltage signal to the mode of multiple metering.
For equipment, the utility model embodiment provides a kind of voltage signal measuring equipment, the voltage signal metering
Equipment include three for acquire the single-phase acquisition unit of single-phase voltage signal, multiple signals for being sampled to signal are adopted
Sample unit and multiple voltage measurement units for being measured to voltage signal, wherein each single-phase acquisition unit includes
Zero curve incoming end, single-phase incoming end, single-phase output end and ground terminal；
The single-phase incoming end of three single-phase acquisition units the first high pressure phase line that external high voltage bus includes respectively,
The zero curve incoming end of two high pressure phase lines and third high pressure phase line, three single-phase acquisition units is connected with each other and external zero curve,
For being acquired to three corresponding single-phase voltage signals of high pressure phase line；
Each voltage measurement unit is correspondingly connected with three signal sampling units, and the same voltage measurement unit institute
Corresponding three signal sampling units are connect with the single-phase output end of three single-phase acquisition units respectively, each described single-phase
The ground terminal of acquisition unit is grounded, with by the voltage measurement unit to the single-phase electricity after the signal sampling unit sampling
Pressure signal is measured.
Optionally, in the utility model embodiment, the zero curve incoming end of three single-phase acquisition units is mutual
Chrysanthemum chain link, and any one zero curve incoming end in the zero curve incoming end as corresponding to three single-phase acquisition units is straight
Connect external zero curve.
Optionally, in the utility model embodiment, the mutual chrysanthemum of ground terminal of three single-phase acquisition units
Chain link, and any one ground terminal in the ground terminal as corresponding to three single-phase acquisition units is directly grounded.
Optionally, in the utility model embodiment, above-mentioned single-phase acquisition unit includes voltage transformer, described single-phase to adopt
Collection unit acquires single-phase voltage corresponding to the high pressure phase line connecting with the single-phase acquisition unit by the voltage transformer
Signal.
Optionally, in the utility model embodiment, the single-phase output end of each single-phase acquisition unit and corresponding letter
The voltage transformer impedance matching that signal connecting line and the single-phase acquisition unit between number sampling unit include, wherein described
The impedance matching value of signal connecting line is the nominal load value of the voltage transformer.
Optionally, in the utility model embodiment, above-mentioned signal sampling unit includes sampling input terminal and sampling output
End；
The sampling input terminal of each signal sampling unit electrically connects with the single-phase output end of corresponding single-phase acquisition unit
It connects, the sampling output unit of each signal sampling unit and corresponding voltage metering units are electrically connected, with to making the list
Phase acquisition unit acquisition single-phase voltage signal be transferred to after the signal sampling unit sampling voltage measurement unit into
Row metering.
Optionally, in the utility model embodiment, all signal sampling lists of the same single-phase acquisition unit connection
The mutual chrysanthemum chain link of sampling input terminal of member, and by any in the sampling input terminal of all signal sampling units
One sampling input terminal is directly connect with the single-phase output end of the single-phase acquisition unit.
Optionally, in the utility model embodiment, each signal sampling unit further includes signal sample circuit, often
A signal sampling unit realizes the sampling processing to voltage signal by the signal sample circuit.
Optionally, in the utility model embodiment, above-mentioned voltage measurement unit includes the first single-phase measurement end, the second list
Phase metering end and third metering end, wherein each single-phase measurement end is correspondingly connected with a signal sampling unit；
First single-phase measurement end of each voltage measurement unit is through the first high pressure phase line of signal sampling unit and acquisition
The single-phase acquisition unit connection of corresponding single-phase voltage signal；
Second single-phase measurement end of each voltage measurement unit is through the second high pressure phase line of signal sampling unit and acquisition
The single-phase acquisition unit connection of corresponding single-phase voltage signal；
The third single-phase measurement end of each voltage measurement unit is through signal sampling unit and acquisition third high pressure phase line
The single-phase acquisition unit connection of corresponding single-phase voltage signal.
For system, the utility model embodiment provides a kind of voltage signal metering system, the voltage signal metering
System includes above-mentioned voltage signal measuring equipment, and includes to external high voltage bus by the voltage signal measuring equipment
First high pressure phase line, the second high pressure phase line and the corresponding single-phase voltage signal of third high pressure phase line carry out multiple metering.
In terms of existing technologies, voltage signal measuring equipment and system provided by the embodiment of the utility model have with
It is lower the utility model has the advantages that the voltage signal measuring equipment cost is relatively low, strong antijamming capability and measuring accuracy is high can pass through one
Road voltage signal realizes the multiple metering to voltage signal to the mode of multiple metering.The voltage signal measuring equipment includes three
A single-phase acquisition unit for acquiring single-phase voltage signal, multiple signal sampling units for being sampled to signal and more
A voltage measurement unit for being measured to voltage signal.Each single-phase acquisition unit includes zero curve incoming end, list
Phase incoming end, single-phase output end and ground terminal.The single-phase incoming end of three single-phase acquisition units distinguishes external high voltage bus
Including the first high pressure phase line, the second high pressure phase line and third high pressure phase line, the zero curve access of three single-phase acquisition units
End is connected with each other and external zero curve, for being acquired to three corresponding single-phase voltage signals of high pressure phase line.Each institute
It states voltage measurement unit and is correspondingly connected with three signal sampling units, and three signals corresponding to the same voltage measurement unit
Sampling unit is connect with the single-phase output end of three single-phase acquisition units respectively, the ground connection of each single-phase acquisition unit
End ground connection, in terms of being carried out by the voltage measurement unit to the single-phase voltage signal after the signal sampling unit sampling
Amount, so that the prior art be avoided to realize that signal is to anti-interference present in multiple metering all the way using star-like connection voltage transformer
The problem that ability is weak and measuring accuracy is low, it is ensured that the anti-interference ability and measuring accuracy of the voltage signal measuring equipment.Wherein
The voltage signal measuring equipment is without spending a large amount of voltage transformer and biggish PCB layout area, thus described in guaranteeing
Voltage signal measuring equipment it is low in cost.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, be cited below particularly the utility model compared with
Good embodiment, and cooperate appended attached drawing, it is described in detail below.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to the utility model claims protection scope as, for those of ordinary skill in the art, is not paying
Under the premise of creative work, it can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is one of the block diagram of voltage signal measuring equipment provided by the embodiment of the utility model.
Fig. 2 is the two of the block diagram of voltage signal measuring equipment provided by the embodiment of the utility model.
Fig. 3 is the three of the block diagram of voltage signal measuring equipment provided by the embodiment of the utility model.
Fig. 4 is the four of the block diagram of voltage signal measuring equipment provided by the embodiment of the utility model.
Icon: 100- voltage signal measuring equipment；The single-phase acquisition unit of 110-；120- voltage measurement unit；130- signal
Sampling unit.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or
The utility model product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for area
Divide description, is not understood to indicate or imply relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
With reference to the accompanying drawing, it elaborates to some embodiments of the utility model.In the absence of conflict, under
The feature in embodiment and embodiment stated can be combined with each other.
Please refer to Fig. 1, be voltage signal measuring equipment 100 provided by the embodiment of the utility model block diagram it
One.In the utility model embodiment, the low production cost of the voltage signal measuring equipment 100 is a large amount of without spending
Voltage transformer and biggish PCB layout area are manufactured.100 strong antijamming capability of voltage signal measuring equipment and
Measuring accuracy is high, can realize in such a way that voltage signal all the way is to multiple metering to the multiple metering of voltage signal, avoid
The prior art realizes that signal is weak to anti-interference ability present in multiple metering all the way and counts using star-like connection voltage transformer
The low problem of accuracy of measurement.
In the present embodiment, the voltage signal measuring equipment 100 includes three for acquiring the list of single-phase voltage signal
Phase acquisition unit 110, multiple signal sampling units 130 for being sampled to signal and it is multiple for voltage signal into
The voltage measurement unit 120 of row metering.Wherein, each single-phase acquisition unit 110 respectively corresponding acquisition high voltage bus include the
The single-phase voltage signal of one high pressure phase line, the second high pressure phase line and a high pressure phase line in third high pressure phase line is acquired.
The number of the signal sampling unit 130 is three times of the number of voltage measurement unit 120, and each voltage measurement unit 120 is right
It should connect three signal sampling units 130, and three signal sampling units that same voltage measurement unit 120 is correspondingly connected with
130 are separately connected three single-phase acquisition units 110, so that each single-phase acquisition unit 110 is correspondingly connected with multiple institutes
Voltage measurement unit 120 is stated, and by multiple voltage measurement units 120 to the single-phase of the single-phase acquisition of acquisition unit 110
Voltage signal of the voltage signal after corresponding signal sampling unit 130 samples is measured, and realizes multiple metering.For example, one
Single-phase acquisition unit 110 acquires single-phase voltage signal corresponding to the first high pressure phase line that high voltage bus includes, then single-phase with this
Multiple voltage measurement units 120 that acquisition unit 110 connects will be to described first acquired by the single-phase acquisition unit 110
Single-phase voltage signal corresponding to high pressure phase line carries out multiple metering.
In the present embodiment, the first high pressure phase line can be the high pressure A phase line in high voltage bus in the prior art,
It is also possible to high pressure B phase line, can also be high pressure C phase line.When the first high pressure phase line is high pressure A phase line, described second
High pressure phase line can be high pressure B phase line, be also possible to high pressure C phase line.
Correspondingly, when the first high pressure phase line is high pressure A phase line, and the second high pressure phase line is high pressure B phase line, institute
Stating third high pressure phase line is high pressure C phase line；When the first high pressure phase line is high pressure A phase line, the second high pressure phase line is height
When pressing C phase line, the third high pressure phase line is high pressure B phase line.When the first high pressure phase line is high pressure B phase line, described the
Two high pressure phase lines can be high pressure A phase line, be also possible to high pressure C phase line.
Correspondingly, when the first high pressure phase line is high pressure B phase line, and the second high pressure phase line is high pressure A phase line, institute
Stating third high pressure phase line is high pressure C phase line；When the first high pressure phase line is high pressure B phase line, the second high pressure phase line is height
When pressing C phase line, the third high pressure phase line is high pressure A phase line.When the first high pressure phase line is high pressure C phase line, described the
Two high pressure phase lines can be high pressure A phase line, be also possible to high pressure B phase line.
Correspondingly, when the first high pressure phase line is high pressure C phase line, and the second high pressure phase line is high pressure A phase line, institute
Stating third high pressure phase line is high pressure B phase line；When the first high pressure phase line is high pressure C phase line, the second high pressure phase line is height
When pressing B phase line, the third high pressure phase line is high pressure A phase line.
In an embodiment of the present embodiment, the first high pressure phase line is high pressure A phase line, second high pressure phase
Line is high pressure B phase line, and the third high pressure phase line is high pressure C phase line, then the corresponding single-phase voltage letter of the first high pressure phase line
It number is A phase voltage signal VA, the corresponding single-phase voltage signal of the second high pressure phase line is B phase voltage signal VB, described
The corresponding single-phase voltage signal of third high pressure phase line is C phase voltage signal VC.
In the present embodiment, each single-phase acquisition unit 110 include zero curve incoming end, it is single-phase incoming end, single-phase defeated
Outlet and ground terminal, wherein the zero curve incoming end is for connecting zero curve, the single-phase incoming end is for accessing high voltage bus packet
The a certain high pressure phase line in the first high pressure phase line, the second high pressure phase line and third high pressure phase line included is to acquire the high pressure phase line
Corresponding single-phase voltage signal, for the ground terminal for being grounded, the single-phase output end is single by the single-phase acquisition for exporting
First 110 collected single-phase voltage signals.
In the present embodiment, the single-phase incoming end of three single-phase acquisition units 110 distinguishes external high voltage bus and includes
The first high pressure phase line, the second high pressure phase line and third high pressure phase line, with three high pressure phase lines corresponding single-phase voltage letter
It number is acquired.Optionally, the single-phase incoming end access of a single-phase acquisition unit 110 in three single-phase acquisition units 110
To high pressure A phase line, the single-phase incoming end of another single-phase acquisition unit 110 is linked into high pressure B phase line, the last one single-phase acquisition
The single-phase incoming end of unit 110 will be linked into high pressure C phase line.
In the present embodiment, the zero curve incoming end interconnection of three single-phase acquisition units 110 and external zero curve UN,
To ensure that the single-phase incoming end of each single-phase acquisition unit 110 can cooperate the zero curve of the single-phase acquisition unit 110 to access
End, is acquired the single-phase voltage signal in the high pressure phase line connecting with the single-phase acquisition unit 110.
In the present embodiment, the zero curve incoming end of three single-phase acquisition units 110 uses daisy chain to connect between each other
The mode connect links together, and is connect by any one zero curve in the zero curve incoming end of three single-phase acquisition units 110
Enter and holds directly external zero curve UN.In an embodiment of the present embodiment, select three single-phase acquisition units 110 in
The directly external zero curve UN of the zero curve incoming end on the single-phase acquisition unit 110 of high pressure A phase line connection.
In the present embodiment, the ground terminal ground connection of each single-phase acquisition unit 110, each single-phase acquisition unit
110 single-phase output end is connect with multiple signal sampling units 130, and each signal sampling unit 130 is correspondingly connected with a voltage
Metering units 120, with by multiple voltage measurement units 120 to the single-phase acquisition unit 110 single-phase electricity collected
Pressure signal is measured, wherein the signal sampling frequencies for each signal sampling unit 130 connecting with same single-phase acquisition unit 110
It may be the same or different.
In the present embodiment, the ground terminal of each single-phase acquisition unit 110 can be directly grounded, and can also mutually be interconnected
It is grounded after connecing by some ground terminal in the ground terminal of three single-phase acquisition units 110.Each single-phase acquisition is single
The single-phase output end of member 110 can each signal sampling unit 130 directly in corresponding multiple signal sampling units 130 according to
Secondary connection is also possible to some the signal sampling unit 130 being directly connected in its corresponding multiple signal sampling unit 130,
Again by being connected in parallel with each other between the multiple signal sampling unit 130, to realize the single-phase defeated of the single-phase acquisition unit 110
Outlet and multiple signal sampling units 130 are electrically connected.In an embodiment of the present embodiment, voltage letter shown in FIG. 1
In number measuring equipment 100, the ground terminal of each single-phase acquisition unit 110 is respectively directly grounded, each single-phase acquisition
Each signal sampling unit 130 in the corresponding multiple signal sampling units 130 in the single-phase output end of unit 110 is successively straight
It connects in succession.
Referring to figure 2., be voltage signal measuring equipment 100 provided by the embodiment of the utility model block diagram it
Two.In the utility model embodiment, each of voltage signal measuring equipment 100 shown in Fig. 2 single-phase acquisition unit
110 ground terminal is connected with each other, and is grounded by some ground terminal in the ground terminal of three single-phase acquisition units 110.
And each letter in the corresponding multiple signal sampling units 130 in the single-phase output end of each single-phase acquisition unit 110
Number sampling unit 130 is successively directly connected to, and each voltage measurement unit 120 is correspondingly connected with three signal sampling units 130, described
The voltage signal that three signal sampling units 130 respectively sample is respectively A phase voltage signal VA, B phase voltage signal VB and C phase electricity
Press signal VC.
In the present embodiment, the mutual chrysanthemum chain link of ground terminal of three single-phase acquisition units 110, and by three
Any one in ground terminal corresponding to a single-phase acquisition unit 110 is directly grounded.In a kind of implementation of the present embodiment
In mode, select on the single-phase acquisition unit 110 being connect in three single-phase acquisition units 110 with high pressure A phase line
The ground terminal is directly grounded.
Referring to figure 3., be voltage signal measuring equipment 100 provided by the embodiment of the utility model block diagram it
Three.In the utility model embodiment, the single-phase acquisition unit 110 includes voltage transformer, the single-phase acquisition unit 110
Single-phase voltage letter corresponding to the high pressure phase line being connect by voltage transformer acquisition with the single-phase acquisition unit 110
Number.
Wherein, the voltage transformer includes port 1, port 2, port 3 and port 4, the port 1 of the voltage transformer
For serving as the single-phase incoming end of the single-phase acquisition unit 110, the port 2 of the voltage transformer is described single-phase for serving as
The zero curve incoming end of acquisition unit 110, the port 3 of the voltage transformer are used to serve as the list of the single-phase acquisition unit 110
Phase output terminal, the port 4 of the voltage transformer are used to serve as the ground terminal of the single-phase acquisition unit 110.
In the present embodiment, the single-phase output end of each single-phase acquisition unit 110 and corresponding signal sampling unit 130
Between signal connecting line and the single-phase acquisition unit 110 voltage transformer impedance matching that includes, wherein the signal connects
The impedance matching value of wiring is the nominal load value of the voltage transformer.Wherein, each single-phase acquisition unit 110 pair
The signal connecting line answered can carry out handling with wrapping, to reduce crosstalk existing for 100 inside of voltage signal measuring equipment.
Referring to figure 4., be voltage signal measuring equipment 100 provided by the embodiment of the utility model block diagram it
Four.In the utility model embodiment, the setting of signal sampling unit 130 is in the single-phase acquisition unit 110 and the electricity
It presses between metering units 120, and is electrically connected with the single-phase acquisition unit 110 and the voltage measurement unit 120, so that institute
The single-phase voltage signal of the single-phase acquisition of acquisition unit 110 is stated after the signal sampling unit 130 sampling, by the signal sampling
The voltage signal that sampling obtains is transferred to the voltage measurement unit 120 and measured by unit 130.
In the present embodiment, the signal sampling unit 130 includes that sampling input terminal and sampled output, the signal are adopted
The sampled output of sample unit 130 is connect with the voltage measurement unit 120, the sampling input of the signal sampling unit 130
End is connect with the single-phase output end of the single-phase acquisition unit 110, so that the voltage measurement unit 120 is adopted to by the signal
Sample unit 130 is measured from the voltage signal that the single-phase voltage signal that the single-phase acquisition unit 110 exports up-samples
Processing.
In the present embodiment, the sampling input terminal phase of all signal sampling units 130 under same single-phase acquisition unit 110
Chrysanthemum chain link between mutually, and inputted by any one sampling in the sampling input terminal of all signal sampling units 130
End is directly connect with the single-phase output end of the single-phase acquisition unit 110.
Wherein, each signal sampling unit 130 under same single-phase acquisition unit 110 is directed to single from the single-phase acquisition
The sampling degree that the single-phase voltage signal of member 110 carries out may be the same or different.
In the present embodiment, each signal sampling unit 130 includes signal sample circuit, each signal sampling
Unit 130 realizes the sampling processing to signal by the signal sample circuit.
In the utility model embodiment, the voltage measurement unit 120 includes the first single-phase measurement end, the second single-phase meter
End and third metering end are measured, wherein each single-phase measurement end is correspondingly connected with a signal sampling unit 130.
In the present embodiment, the first single-phase measurement end of each voltage measurement unit 120 is through signal sampling unit 130
The single-phase acquisition unit 110 of single-phase voltage signal corresponding with the first high pressure phase line of acquisition connects.
In the present embodiment, the second single-phase measurement end of each voltage measurement unit 120 is through signal sampling unit 130
The single-phase acquisition unit 110 of single-phase voltage signal corresponding with the second high pressure phase line of acquisition connects.
In the present embodiment, the third single-phase measurement end of each voltage measurement unit 120 is through signal sampling unit 130
The single-phase acquisition unit 110 of single-phase voltage signal corresponding with acquisition third high pressure phase line connects.
In the present invention, the utility model embodiment also provides a kind of voltage signal metering system, the voltage letter
Number metering system includes voltage signal measuring equipment 100 shown in any one figure in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, and by described
The first high pressure phase line, the second high pressure phase line and the third high pressure phase that voltage signal measuring equipment 100 includes to external high voltage bus
The corresponding single-phase voltage signal of line carries out multiple metering.
In conclusion in voltage signal measuring equipment provided by the embodiment of the utility model and system, the voltage letter
Cost is relatively low for number measuring equipment, strong antijamming capability and measuring accuracy is high, can be by voltage signal all the way to multiple metering
Mode realize the multiple metering to voltage signal.The voltage signal measuring equipment includes three for acquiring single-phase voltage letter
Number single-phase acquisition unit, multiple signal sampling units for being sampled to signal and multiple for being carried out to voltage signal
The voltage measurement unit of metering.Each single-phase acquisition unit include zero curve incoming end, single-phase incoming end, single-phase output end and
Ground terminal.The single-phase incoming end of three single-phase acquisition units the first high pressure phase line that external high voltage bus includes respectively,
The zero curve incoming end of two high pressure phase lines and third high pressure phase line, three single-phase acquisition units is connected with each other and external zero curve,
For being acquired to three corresponding single-phase voltage signals of high pressure phase line.Each voltage measurement unit is correspondingly connected with
Three signal sampling units, and three signal sampling units corresponding to the same voltage measurement unit are respectively and described in three
The single-phase output end of single-phase acquisition unit connects, the ground terminal ground connection of each single-phase acquisition unit, to pass through the voltage
Metering units measure the single-phase voltage signal after the signal sampling unit sampling, so that the prior art be avoided to use
Star-like connection voltage transformer is realized that signal is weak to anti-interference ability present in multiple metering all the way and measuring accuracy is low and is asked
Topic, it is ensured that the anti-interference ability and measuring accuracy of the voltage signal measuring equipment.Wherein the voltage signal measuring equipment without
A large amount of voltage transformer and biggish PCB layout area need to be spent, to guarantee the cost of the voltage signal measuring equipment
It is cheap.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of voltage signal measuring equipment, which is characterized in that the voltage signal measuring equipment includes three for acquiring list
The single-phase acquisition unit of phase voltage signal, multiple signal sampling units for being sampled to signal and multiple for voltage
The voltage measurement unit that signal is measured, wherein each single-phase acquisition unit include zero curve incoming end, single-phase incoming end,
Single-phase output end and ground terminal；
It is the single-phase incoming end of three single-phase acquisition units the first high pressure phase line that external high voltage bus includes respectively, second high
Phase line and third high pressure phase line are pressed, the zero curve incoming end of three single-phase acquisition units is connected with each other and external zero curve, is used for
Three corresponding single-phase voltage signals of high pressure phase line are acquired；
Each voltage measurement unit is correspondingly connected with three signal sampling units, and corresponding to the same voltage measurement unit
Three signal sampling units connect respectively with the single-phase output end of three single-phase acquisition units, each single-phase acquisition
The ground terminal of unit is grounded, to be believed by the voltage measurement unit the single-phase voltage after the signal sampling unit sampling
It number is measured.
2. voltage signal measuring equipment according to claim 1, which is characterized in that
The mutual chrysanthemum chain link of the zero curve incoming end of three single-phase acquisition units, and it is single by three single-phase acquisitions
The directly external zero curve of any one zero curve incoming end in zero curve incoming end corresponding to member.
3. voltage signal measuring equipment according to claim 2, which is characterized in that
The mutual chrysanthemum chain link of the ground terminal of three single-phase acquisition units, and by three single-phase acquisition unit institutes
Any one ground terminal in corresponding ground terminal is directly grounded.
4. voltage signal measuring equipment described in any one of -3 according to claim 1, which is characterized in that
The single-phase acquisition unit includes voltage transformer, and the single-phase acquisition unit is acquired by the voltage transformer and institute
State single-phase voltage signal corresponding to the high pressure phase line of single-phase acquisition unit connection.
5. voltage signal measuring equipment according to claim 4, which is characterized in that
Signal connecting line between the single-phase output end of each single-phase acquisition unit and corresponding signal sampling unit with it is described
The voltage transformer impedance matching that single-phase acquisition unit includes, wherein the impedance matching value of the signal connecting line is the voltage
The nominal load value of mutual inductor.
6. voltage signal measuring equipment according to claim 5, which is characterized in that
The signal sampling unit includes sampling input terminal and sampled output；
The sampling input terminal of each signal sampling unit is electrically connected with the single-phase output end of corresponding single-phase acquisition unit, often
The sampling output unit of a signal sampling unit and corresponding voltage metering units are electrically connected, with to making the single-phase acquisition
The single-phase voltage signal of unit acquisition is transferred to the voltage measurement unit after the signal sampling unit sampling and is measured.
7. voltage signal measuring equipment according to claim 6, which is characterized in that
The mutual chrysanthemum chain link of sampling input terminal of all signal sampling units of the same single-phase acquisition unit connection,
And it directly single-phase is adopted with described by any one sampling input terminal in the sampling input terminal of all signal sampling units
Collect the single-phase output end connection of unit.
8. voltage signal measuring equipment according to claim 7, which is characterized in that
Each signal sampling unit further includes signal sample circuit, and each signal sampling unit is adopted by the signal
Sample circuit realizes the sampling processing to voltage signal.
9. voltage signal measuring equipment according to claim 6, which is characterized in that
The voltage measurement unit includes the first single-phase measurement end, the second single-phase measurement end and third metering end, wherein each list
Phase metering end is correspondingly connected with a signal sampling unit；
First single-phase measurement end of each voltage measurement unit is corresponding with the first high pressure phase line of acquisition through signal sampling unit
The single-phase acquisition unit of single-phase voltage signal connects；
Second single-phase measurement end of each voltage measurement unit is corresponding with the second high pressure phase line of acquisition through signal sampling unit
The single-phase acquisition unit of single-phase voltage signal connects；
The third single-phase measurement end of each voltage measurement unit is corresponding with acquisition third high pressure phase line through signal sampling unit
The single-phase acquisition unit of single-phase voltage signal connects.
10. a kind of voltage signal metering system, which is characterized in that the voltage signal metering system includes in claim 1-9
Voltage signal measuring equipment described in any one, and include to external high voltage bus by the voltage signal measuring equipment
First high pressure phase line, the second high pressure phase line and the corresponding single-phase voltage signal of third high pressure phase line carry out multiple metering.
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