CN203798891U - Auxiliary device for measuring capacitance current of power distribution network under electrified condition - Google Patents
Auxiliary device for measuring capacitance current of power distribution network under electrified condition Download PDFInfo
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- CN203798891U CN203798891U CN201420154274.1U CN201420154274U CN203798891U CN 203798891 U CN203798891 U CN 203798891U CN 201420154274 U CN201420154274 U CN 201420154274U CN 203798891 U CN203798891 U CN 203798891U
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- handcart
- neutral point
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- module
- distribution network
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- 230000007935 neutral effect Effects 0.000 claims abstract description 27
- 238000005259 measurement Methods 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000001629 suppression Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model provides an auxiliary device for measuring the capacitance current of a power distribution network under an electrified condition. The auxiliary device comprises a PT handcart module. The auxiliary device also comprises a single-phase alternating-current contactor K; one end of the single-phase alternating-current contactor K is connected with one end of a high-impedance harmonic wave eliminator at the neutral point of the PT handcart module; and the other end of the single-phase alternating-current contactor K is connected with the other end of the high-impedance harmonic wave eliminator at the neutral point of the PT handcart module. The auxiliary device is mounted at the neutral point of the high-voltage side of a PT handcart, so that the tedious work for measuring the capacitance current of the power distribution network can be simple and clear, and operation exiting is not needed to be performed on a PT, and workload can be decreased, and work efficiency can be improved, and work security can be improved.
Description
Technical field
The utility model relates to a kind of servicing unit, refers in particular to a kind of power failure and measures the servicing unit of capacitance current of distribution network.
Background technology
The PT mode of connection of power distribution network is mainly the 3PT mode of connection at present, and earthing mode mainly adopts two kinds of " N ground connection ", " B phase ground connection ", and its wiring diagram as depicted in figs. 1 and 2.
In fact be in operation and adopt its method of operation of distribution of the 3PT mode of connection, as shown in Figure 3: PT high-pressure side neutral point is connected to high resistant resonance eliminator 1, and PT open delta is connected to secondary resonance elimination device 3, in part system, be also connected to arc suppression coil 2 in addition.
While adopting " Injection Current method " to measure power distribution network capacity current, the method for operation must be converted to the method for operation shown in Fig. 1 or Fig. 2, at this moment must do following adjustment work:
1, the high resistant resonance eliminator that short circuit PT high-pressure side neutral point is installed;
2, exit the harmonic elimination apparatus of PT open delta;
3, arc suppression coil is all out of service.
Under prior art bar, in these adjustment work, the 2nd and the 3rd ratio are easier to realize: the 2nd is exited the harmonic elimination apparatus of PT open delta and open as long as disconnect the low pressure sky of 220V, the 3rd arc suppression coil is out of service as long as disconnect the on high-tension side isolating switch of arc suppression coil, and the operation that disconnects this isolating switch also only needs to control its secondary circuit and just can realize.The 1st implements suitable trouble, it need to be by out of service by PT the pull-out of PT handcart, on the neutral point of the PT exiting, by its neutral-point solid ground (by the high resistant resonance eliminator of short circuit PT high-pressure side neutral point), and then PT is put into operation, carry out the measurement of capacitance current.After measurement finishes, again by out of service this PT, remove the shorting stub of this PT high-pressure side neutral point high resistant resonance eliminator, PT high-pressure side neutral point high resistant resonance eliminator is put into operation again, the method for operation that recovery system is original.Could realize like this target of the 1st.Relate in this course the power failure operation of a high-tension apparatus, handle electric power the first work ticket and electric operation ticket by the requirement of electric power netting safe running code, formality complexity, wastes time and energy, and the target realizing is relatively simple.
Summary of the invention
The technical problems to be solved in the utility model, is to provide a kind of power failure to measure the servicing unit of capacitance current of distribution network, has improved the security of work efficiency and work.
The utility model is achieved in that a kind of servicing unit of the measurement capacitance current of distribution network that do not have a power failure, comprise PT handcart module, also comprise single phase ac contactor K, one end of described single phase ac contactor K is connected to one end of the neutral point place high resistant resonance eliminator of described PT handcart module, and the other end of described single phase ac contactor K is connected to the other end of the neutral point place high resistant resonance eliminator of described PT handcart module.
Further, described single phase ac contactor K comprises solenoid KM, combined floodgate node HZ, self-locking node K1 and separating brake node FZ, after described combined floodgate node HZ is in parallel with described self-locking node K1, one end is connected to one end of described solenoid KM, the other end is connected to one end of described separating brake node FZ, the other end of described solenoid KM is connected to one end of the neutral point place high resistant resonance eliminator of described PT handcart module, and the other end of described separating brake node FZ is connected to the other end of the neutral point place high resistant resonance eliminator of described PT handcart module.
The utility model has the advantage of: by PT handcart high-pressure side neutral point is installed to this device, make to measure this cumbersome work of capacitance current of distribution network and become simple and clear, needn't do operation out of service to PT, saved labor capacity, improve work efficiency, with the security of raising work.
Brief description of the drawings
The utility model is further described with reference to the accompanying drawings in conjunction with the embodiments.
Fig. 1 is the N ground connection schematic diagram that adopts the distribution operation of the 3PT mode of connection.
Fig. 2 is the B phase ground connection schematic diagram that adopts the distribution operation of the 3PT mode of connection.
Fig. 3 is the power network neutral point ground connection schematic diagram with harmonic elimination and secondary harmonic elimination.
Fig. 4 is installation site of the present utility model schematic diagram.
Fig. 5 is internal circuit diagram of the present utility model.
Embodiment
A kind of power failure measured the servicing unit of capacitance current of distribution network, comprise PT handcart module, also comprise single phase ac contactor K, one end of described single phase ac contactor K is connected to one end of the neutral point place high resistant resonance eliminator of described PT handcart module, and the other end of described single phase ac contactor K is connected to the other end of the neutral point place high resistant resonance eliminator of described PT handcart module.
As shown in Figure 4, at the high resistant resonance eliminator one side single phase ac contactor K in parallel of PT high pressure neutral point;
As shown in Figure 5, described single phase ac contactor K comprises solenoid KM, combined floodgate node HZ, self-locking node K1 and separating brake node FZ, after described combined floodgate node HZ is in parallel with described self-locking node K1, one end is connected to one end of described solenoid KM, the other end is connected to one end of described separating brake node FZ, the other end of described solenoid KM is connected to one end of the neutral point place high resistant resonance eliminator of described PT handcart module, and the other end of described separating brake node FZ is connected to the other end of the neutral point place high resistant resonance eliminator of described PT handcart module.
KM is the solenoid of contactor, and combined floodgate node HZ and self-locking node K1 often open node, and separating brake node FZ is normally closed node, and control loop connects 220V AC power.
This device principle of work is as follows: when needs lead to this PT carry out capacitance current of distribution network measure time, press switch knob HZ, solenoid KM is subject to electricity to produce suction, cause two of K and K1 and often open node closure, wherein K closes and will reach the effect of PT high-pressure side neutral point high resistant resonance eliminator short circuit, K1 is closed to connect with the normally closed node of opening button FZ, makes KM solenoid continue there is power supply, keeps the closure of K; After the experiment work of measurement capacitance current finishes, by opening button FZ, the open circuit power supply K of control loop and two of K1 often opens node and returns to and often open node, and K opens circuit and the high resistant resonance eliminator of PT high pressure neutral point is put into operation, recovers the normal operating mode of electrical network.
The utility model has the advantage of: by PT handcart high-pressure side neutral point is installed to this device, make to measure this cumbersome work of capacitance current of distribution network and become simple and clear, needn't do operation out of service to PT, saved labor capacity, improve work efficiency, with the security of raising work.
Although more than described embodiment of the present utility model; but being familiar with those skilled in the art is to be understood that; our described specific embodiment is illustrative; instead of for the restriction to scope of the present utility model; those of ordinary skill in the art are in equivalent modification and the variation done according to spirit of the present utility model, all should be encompassed in the scope that claim of the present utility model protects.
Claims (2)
1. the servicing unit of measurement capacitance current of distribution network that do not have a power failure, comprise PT handcart module, it is characterized in that: also comprise single phase ac contactor K, one end of described single phase ac contactor K is connected to one end of the neutral point place high resistant resonance eliminator of described PT handcart module, and the other end of described single phase ac contactor K is connected to the other end of the neutral point place high resistant resonance eliminator of described PT handcart module.
2. a kind of power failure as claimed in claim 1 measured the servicing unit of capacitance current of distribution network, it is characterized in that: described single phase ac contactor K comprises solenoid KM, combined floodgate node HZ, self-locking node K1 and separating brake node FZ, after described combined floodgate node HZ is in parallel with described self-locking node K1, one end is connected to one end of described solenoid KM, the other end is connected to one end of described separating brake node FZ, the other end of described solenoid KM is connected to one end of the neutral point place high resistant resonance eliminator of described PT handcart module, the other end of described separating brake node FZ is connected to the other end of the neutral point place high resistant resonance eliminator of described PT handcart module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154274.1U CN203798891U (en) | 2014-04-01 | 2014-04-01 | Auxiliary device for measuring capacitance current of power distribution network under electrified condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154274.1U CN203798891U (en) | 2014-04-01 | 2014-04-01 | Auxiliary device for measuring capacitance current of power distribution network under electrified condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203798891U true CN203798891U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420154274.1U Expired - Fee Related CN203798891U (en) | 2014-04-01 | 2014-04-01 | Auxiliary device for measuring capacitance current of power distribution network under electrified condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203798891U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405252A (en) * | 2016-11-18 | 2017-02-15 | 国网江苏省电力公司宿迁供电公司 | PT cabinet harmonic wave eliminator data measuring method and PT cabinet harmonic wave eliminator data measuring device |
| CN108982960A (en) * | 2018-08-13 | 2018-12-11 | 西安科技大学 | A kind of capacitance current of distribution network measurement method and device |
-
2014
- 2014-04-01 CN CN201420154274.1U patent/CN203798891U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405252A (en) * | 2016-11-18 | 2017-02-15 | 国网江苏省电力公司宿迁供电公司 | PT cabinet harmonic wave eliminator data measuring method and PT cabinet harmonic wave eliminator data measuring device |
| CN108982960A (en) * | 2018-08-13 | 2018-12-11 | 西安科技大学 | A kind of capacitance current of distribution network measurement method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20150401 |
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| EXPY | Termination of patent right or utility model |