CN205920140U - Measurement voltage transformer secondary load compensation arrangement and electric energy metering device - Google Patents
Measurement voltage transformer secondary load compensation arrangement and electric energy metering device Download PDFInfo
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- CN205920140U CN205920140U CN201620426915.3U CN201620426915U CN205920140U CN 205920140 U CN205920140 U CN 205920140U CN 201620426915 U CN201620426915 U CN 201620426915U CN 205920140 U CN205920140 U CN 205920140U
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Abstract
The utility model discloses a measurement voltage transformer secondary load compensation arrangement and electric energy metering device, measurement voltage transformer secondary load compensation arrangement includes resistance, electric capacity and a plurality of connecting wire, resistance passes through with electric capacity connecting wire parallel connection, resistance with electric capacity forms parallel circuit, parallel circuit is used for the secondary metering winding parallel connection with voltage transformer. Measurement voltage transformer secondary load compensation arrangement and electric energy metering device through with the firm demand and connect the winding in voltage transformer's secondary metering, can compensate voltage transformer's secondary load, avoids because of the voltage transformer secondary load undersize leads to voltage transformer operation error overproof firm energy measurement accurate and just.
Description
Technical field
This utility model is related to voltage of power transformer technical field, and more particularly, to a kind of metered voltage transformer is secondary negative
Lotus compensation device and electric power meter.
Background technology
Dl/t448-2000 " electric power meter technical management code " specifies: " the actual secondary load of transformer should be
In the range of the specified secondary load of 25%-100% ".Advise during jjg 1021-2007 " electric power mutual-inductor vertification regulation " error testing
Fixed: " the lower limited load of voltage transformer is pressed 2.5va and chosen ".And the fast development with electric measuring instrument technology, electronic watt-hour
Table instead of mechanical power energy meter substantially, but the duty ratio mechanical power energy meter of electronic electric energy meter voltage circuit is little very
Many, thus leading to the secondary load measuring transformer secondary circuit much smaller before comparing.In fact, adopting electronic watt-hour
After table and special measuring loop, the secondary actual load of many metered voltage transformers below limited load 2.5va all under regulation,
Make metered voltage transformer actual motion error positivity biass, in addition overproof it is impossible to ensure the accurately and just of electric energy metrical.
Content of the invention
Based on this, this utility model is to overcome the defect of prior art, provides one kind it can be avoided that because of voltage transformer
Secondary load too small and lead to voltage transformer kinematic error overproof, ensure electric energy metrical accurate metered voltage transformer secondary
Load compensation device and electric power meter.
Its technical scheme is as follows:
A kind of metered voltage transformer secondary load compensation device, including resistance, electric capacity and some connecting wires, described
Resistance is connected in parallel by described connecting wire with electric capacity, and described resistance and described electric capacity form parallel circuit, described electricity in parallel
Road is used for being connected with the secondary measurement winding parallel of voltage transformer.
Wherein in an embodiment, described metered voltage transformer secondary load compensation device also includes fuse, institute
State fuse to be connected with described parallel circuit in series by connecting wire, described fuse forms series electrical with described parallel circuit
Road, described series circuit is used for being connected with the secondary measurement winding parallel of voltage transformer.
Wherein in an embodiment, described metered voltage transformer secondary load compensation device also includes encapsulating box,
Described series circuit is located in described encapsulation box, and the connecting wire at described series circuit two ends passes outside described encapsulation box.
Wherein in an embodiment, described encapsulation box is plastic insulation box.
Wherein in an embodiment, the resistance of described resistance is 1667 ω, and the capacitance of described electric capacity is 1.43 μ f.
A kind of electric power meter, including voltage transformer, electric energy meter and metered voltage transformer two described above
Secondary load compensation device, the secondary measurement of described metered voltage transformer secondary load compensation device and described voltage transformer around
Group is connected in parallel, and described electric energy meter is connected with the secondary measurement windings in series of described voltage transformer.
The beneficial effects of the utility model are:
Above-mentioned metered voltage transformer secondary load compensation device, the parallel circuit of resistance formation in parallel with electric capacity can conduct
Firm demand, this firm demand is connected to the secondary measurement winding of voltage transformer, can compensate for the secondary of voltage transformer
The secondary load of measure winding, makes the secondary load of voltage transformer reach setting, can avoid bearing because of voltage transformer secondary
Lotus too small and lead to voltage transformer kinematic error overproof it is ensured that electric energy metrical accurately and just.
Described electric power meter includes above-mentioned metered voltage transformer secondary load compensation device, possesses described metering electricity
The technique effect of pressure transformer secondary load compensation device, can avoid leading to voltage mutual because Secondary Load of Voltage Transformer is too small
Sensor kinematic error overproof it is ensured that electric energy metrical accurately and just.
Brief description
Fig. 1 is the structural representation of the metered voltage transformer secondary load compensation device described in this utility model embodiment
Figure；
Fig. 2 is the structural representation of the electric power meter described in this utility model embodiment.
Description of reference numerals:
10th, metered voltage transformer secondary load compensation device, 110, resistance, 120, electric capacity, 130, connecting wire, 140,
Fuse, 150, encapsulation box, 20, voltage transformer, 210, secondary measurement winding, 30, electric energy meter.
Specific embodiment
Below embodiment of the present utility model is described in detail:
As shown in Figure 1 and Figure 2, a kind of electric power meter, including metered voltage transformer secondary load compensation device 10,
Voltage transformer 20 and electric energy meter 30.
Described metered voltage transformer secondary load compensation device 10 includes resistance 110, electric capacity 120 and some connections and leads
Line 130, described resistance 110 is connected in parallel by described connecting wire 130 with electric capacity 120, described resistance 110 and described electric capacity
120 formation parallel circuits, described parallel circuit is used for being connected in parallel with the secondary measurement winding 210 of voltage transformer 20.Described
The parallel circuit of resistance 110 formation in parallel with electric capacity 120 can be mutual by this firm demand is connected to voltage as firm demand
The secondary measurement winding 210 of sensor 20, can compensate for the secondary load of the secondary measurement winding 210 of voltage transformer 20, makes electricity
The secondary load of pressure transformer 20 reaches setting, can avoid because voltage transformer 20 secondary load is too small and lead to mutual induction of voltage
Device 20 kinematic error overproof it is ensured that electric energy metrical accurately and just.
Described metered voltage transformer secondary load compensation device 10 also includes fuse 140, and described fuse 140 passes through
Connecting wire 130 is connected with described parallel circuit in series, and described fuse 140 and described parallel circuit form series circuit, institute
State series circuit to be connected in parallel for the secondary measurement winding 210 with voltage transformer 20.By arranging fuse 140, can
Ensure circuit safety, the series circuit that fuse 140 is formed with parallel circuit overall as firm demand, when whole firm demand
Circuit break down or loop short circuit and make voltage transformer 20 second short circuit, fuse 140 can fuse in time, ensure equipment peace
Entirely.
Described metered voltage transformer secondary load compensation device 10 also includes encapsulating box 150, described series circuit position
In described encapsulation box 150, the connecting wire 130 at described series circuit two ends passes outside described encapsulation box 150.By setting
Put encapsulation box 150, on the one hand can be used for receiving, encapsulating described fuse 140, resistance 110 and electric capacity 120, protect each unit
Part；On the other hand the described metered voltage transformer secondary load compensation device 10 of this enforcement can be made to be an entirety, be easy to fill
Tear open.Described encapsulation box 150 is plastic insulation box, and good insulation preformance, using safety.
In the present embodiment, described resistance 110 is precision resister, and described electric capacity 120 is high-accuracy capacitor.In electric power mutual inductance
In device, power factor is taken to be 0.8, the secondary rated voltage of metered voltage transformer is 100/ √ 3, when the resistance of described resistance 110
For 1667 ω, when the electric capacity 120 of described electric capacity 120 is worth for 1.43 μ f, the admittance of compensation be y=(0.6+0.45j) ms it is ensured that
The secondary firm demand compensating is 2.5va, you can meet compensation demand.In practical situation, the value of resistance 110 and electric capacity 120
Different values can be taken as the case may be.
Described metered voltage transformer secondary load compensation device 10 and the secondary measurement winding of described voltage transformer 20
210 are connected in parallel, and described electric energy meter 30 is connected in series with the secondary measurement winding 210 of described voltage transformer 20.Described electric energy
Metering device includes above-mentioned metered voltage transformer secondary load compensation device 10, possesses described metered voltage transformer secondary negative
The technique effect of lotus compensation device 10, can avoid because voltage transformer 20 secondary load is too small and lead to voltage transformer 20 to run
Error is overproof, and electric energy metrical is accurate, just.
Each technical characteristic of embodiment described above can arbitrarily be combined, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic applied in example is all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope of this specification record.
Embodiment described above only have expressed several embodiments of the present utility model, and its description is more concrete and detailed,
But therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, some deformation can also be made and improve, these broadly fall into
Protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be defined by claims.
Claims (5)
1. a kind of metered voltage transformer secondary load compensation device is it is characterised in that include resistance, electric capacity and some connections
Wire, described resistance is connected in parallel by described connecting wire with electric capacity, and described resistance forms parallel circuit, institute with described electric capacity
State parallel circuit for being connected with the secondary measurement winding parallel of voltage transformer, also include fuse, described fuse passes through
Connecting wire is connected with described parallel circuit in series, and described fuse forms series circuit, described series connection with described parallel circuit
Circuit is used for being connected with the secondary measurement winding parallel of voltage transformer.
2. metered voltage transformer secondary load compensation device according to claim 1 is it is characterised in that also include encapsulating
Box, described series circuit is located in described encapsulation box, and the connecting wire at described series circuit two ends passes described enclosure
Son is outer.
3. metered voltage transformer secondary load compensation device according to claim 2 is it is characterised in that described enclosure
Son is plastic insulation box.
4. the metered voltage transformer secondary load compensation device according to any one of claim 1-3 is it is characterised in that institute
The resistance stating resistance is 1667 ω, and the capacitance of described electric capacity is 1.43 μ f.
5. a kind of electric power meter is it is characterised in that include voltage transformer, electric energy meter and any one of claim 1-4
Described metered voltage transformer secondary load compensation device, described metered voltage transformer secondary load compensation device with described
The secondary measurement winding parallel of voltage transformer connects, the secondary measurement windings in series of described electric energy meter and described voltage transformer
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620426915.3U CN205920140U (en) | 2016-05-11 | 2016-05-11 | Measurement voltage transformer secondary load compensation arrangement and electric energy metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620426915.3U CN205920140U (en) | 2016-05-11 | 2016-05-11 | Measurement voltage transformer secondary load compensation arrangement and electric energy metering device |
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| CN205920140U true CN205920140U (en) | 2017-02-01 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212292A (en) * | 2018-10-18 | 2019-01-15 | 中国电力科学研究院有限公司 | A kind of power supply type voltage transformer and application method with voltage measurement function |
| CN109212455A (en) * | 2018-09-07 | 2019-01-15 | 中国电力科学研究院有限公司 | A kind of method and system for verifying power supply type voltage transformer power winding voltages stability |
| CN109212293A (en) * | 2018-10-18 | 2019-01-15 | 中国电力科学研究院有限公司 | A kind of power supply type voltage transformer and application method with voltage measurement function |
| CN109541273A (en) * | 2018-12-25 | 2019-03-29 | 宁波美星机电有限公司 | A kind of intelligent appliance electric energy metering device |
| CN112014635A (en) * | 2020-09-04 | 2020-12-01 | 南方电网科学研究院有限责任公司 | Electric automobile wireless charging electric energy metering method and device and charging pile |
-
2016
- 2016-05-11 CN CN201620426915.3U patent/CN205920140U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212455A (en) * | 2018-09-07 | 2019-01-15 | 中国电力科学研究院有限公司 | A kind of method and system for verifying power supply type voltage transformer power winding voltages stability |
| CN109212292A (en) * | 2018-10-18 | 2019-01-15 | 中国电力科学研究院有限公司 | A kind of power supply type voltage transformer and application method with voltage measurement function |
| CN109212293A (en) * | 2018-10-18 | 2019-01-15 | 中国电力科学研究院有限公司 | A kind of power supply type voltage transformer and application method with voltage measurement function |
| CN109212293B (en) * | 2018-10-18 | 2021-04-02 | 中国电力科学研究院有限公司 | Power supply type voltage transformer with voltage metering function and use method |
| CN109541273A (en) * | 2018-12-25 | 2019-03-29 | 宁波美星机电有限公司 | A kind of intelligent appliance electric energy metering device |
| CN112014635A (en) * | 2020-09-04 | 2020-12-01 | 南方电网科学研究院有限责任公司 | Electric automobile wireless charging electric energy metering method and device and charging pile |
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