CN203561724U - DC power source crosstalk fault monitoring and positioning system - Google Patents
DC power source crosstalk fault monitoring and positioning system Download PDFInfo
- Publication number
- CN203561724U CN203561724U CN201320699316.5U CN201320699316U CN203561724U CN 203561724 U CN203561724 U CN 203561724U CN 201320699316 U CN201320699316 U CN 201320699316U CN 203561724 U CN203561724 U CN 203561724U
- Authority
- CN
- China
- Prior art keywords
- circuit
- sampling circuit
- direct supply
- processor
- wireless signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 238000005070 sampling Methods 0.000 claims abstract description 47
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Landscapes
- Locating Faults (AREA)
Abstract
The utility model discloses a DC power source crosstalk fault monitoring and positioning system which is used for on-line monitoring and powered-on positioning of DC crosstalk faults of a DC power source I and a DC power source II that are running independently. The system comprises a host, a hand-held device and a split core type current transformer. The host is in wireless connection with the hand-held device which is in wired connection with the split core type current transformer. The host includes a switching bridge circuit, a balance bridge circuit I, a balance bridge circuit II, a voltage sampling circuit I, a voltage sampling circuit II, a processor I and a wireless signal transmitting circuit. The processor I is in connection with the voltage sampling circuit I, the voltage sampling circuit II and the wireless signal transmitting circuit. The balance bridge circuit I is connected between the positive terminal and the negative terminal of a DC power source I. The switching bridge circuit and the balance bridge circuit II are in parallel connection and then are connected between the positive terminal and the negative terminal of a DC power source II. The voltage sampling circuit I is connected with the positive terminal, the negative terminal and the ground terminal of the DC power source I. The voltage sampling circuit II is connected with the positive terminal, the negative terminal and the ground terminal of the DC power source II. The hand-held device includes a wireless signal receiving circuit, a processor II and a current sampling circuit. Output of the wireless signal receiving circuit and output of the current sampling circuit are in connected with the processor II. Input of the current sampling circuit is in connection with output of the split core type current transformer.
Description
Technical field
The utility model relates to looped network (that is: direct current the is altered mutually) fault in power domain, relates in particular to a kind of direct supply ring network fault monitoring and positioning system.
Background technology
For the DC power system of transformer station or generating plant, in order to guarantee reliability, generally adopt two cover direct supplys (two group storage batteries and charging set are realized).Under normal circumstances, two group storage batteries divide open shop, form two and overlap independently DC power system.But, may in work progress, occur load power line connection error and two sections of DC buss of cross-over connection cause certain load power line more than two, and the power lead having more is received another section of bus; Or, may, in while falling load operation, certain load be forwarded to after another section of bus, the on-load switch of that original section is not disconnected, cause this load to be powered by two sections of buses simultaneously; Above-mentioned situation, all can cause the DC power system of two cover independent operatings to occur electrical connection phenomenon, i.e. " looped network (being that direct current is altered mutually) phenomenon.And while there is looped network, can fire hazard, shorten that service lifetime of accumulator, Earth Fault Detection sensitivity decline, ground connection causes that the probability of protection malfunction increases and may cause and the situations such as equipment tripping reduced the security of system.
And while there is looped network at present; general broaching tool lock, the disconnected method of insuring, separating terminal of adopting searched direct current and altered mutually trouble spot; but this mode operation easier is very large; in the search procedure of trouble spot, also may cause because of power-off protective relaying maloperation to be done; therefore; those skilled in the art without power-off, can realize the mode that direct supply ring network fault point is searched in the urgent need to one.
Utility model content
In view of this, the utility model provides a kind of direct supply ring network fault monitoring and positioning system, can realize the on-line monitoring of direct supply looped network, and without power-off, just can realize direct current and alter mutually searching of trouble spot, meets those skilled in the art's demand.
The utility model provides a kind of direct supply ring network fault monitoring and positioning system, for the direct supply I to independent operating, the direct current of II is altered mutually fault and is monitored and locate, comprise main frame, hander and split core type current transformer, described main frame and hander wireless connections, described hander and split core type current transformer wired connection, described main frame comprises switching bridge circuit, balance bridge circuit I, II, voltage sampling circuit I, II, processor I and wireless signal transtation mission circuit, described processor I respectively with voltage sampling circuit I, II is connected with wireless signal transtation mission circuit, described balance bridge circuit I is just being connected to direct supply I, between negative terminal, after described switching bridge circuit and balance bridge circuit II parallel connection, be just connected to direct supply II, between negative terminal, described voltage sampling circuit I and described direct supply I are just, negative, ground terminal connects, described voltage sampling circuit II and described direct supply II are just, negative, ground terminal connects, described hander comprises wireless signal receiving circuit, processor II and current sampling circuit, the output of described wireless signal receiving circuit and current sampling circuit is connected to respectively described processor II, and the input of described current sampling circuit is connected with the output of described split core type current transformer.
Further, described main frame also comprises: control button I, the LCDs I, LED light and the hummer that are connected with described processor I.
Further, described hander also comprises: the control button II and the LCDs II that are connected with described processor II.
Further, described current sampling circuit adopts two core shielding lines to be connected with split core type current transformer.
Further, described current sampling circuit comprises: resistance R 1, R2, R3, R4, R5, R6, R7, capacitor C 1, C2, C3, with operational amplifier LM1, LM2, described R1 is serially connected between the inverting input and ground of described LM1, the two ends of described R2 connect respectively the inverting input of the first datum and described LM1, described R3 is serially connected between the in-phase input end and ground of described LM1, after described R4 and C1 parallel connection, be serially connected between the output terminal and inverting input of described LM1, after described C2 and R5 series connection, be serially connected between the output terminal of described LM1 and the inverting input of LM2, the in-phase input end of described LM2 connects the second datum, after described R6 and C2 parallel connection, be serially connected between the output terminal and inverting input of described LM2, one end of described R7 is connected with the output terminal of described LM2, the other end is as the output of described current sampling circuit, described C3 one end ground connection, the other end connects with respect to the one end being connected with the output terminal of described LM2 with described R7.
Further, the precision of described resistance R 1, R2, R3, R4, R5, R6, R7 is in 0.1%.
The beneficial effects of the utility model:
The utility model is mainly comprised of main frame, hander and split core type current transformer, and wherein main frame is connected with direct supply, and Real-Time Monitoring two overlaps the direct current of the direct supply of independent operating and alters mutually fault state, hander and split core type current transformer are portable, when system is altered fault mutually without direct current, be placed in instrument aluminium case, when two sections of direct supplys occur that direct current is altered fault mutually, main frame applies a direct current and alters mutually characteristic signal on the feeder assembly that has direct current to alter mutually, now open again hander, the signal that Receiving Host sends, and coordinate split core type current transformer, all feeder assemblies to two cover direct supplys detect, detect the marking current in each loop, if this loop has direct current to alter mutually fault, (direct current is altered mutually fault and is comprised: the positive pole of direct supply I, negative pole, positive negative bipolar respectively with the positive pole of direct supply II, negative pole, positive negative bipolar forms respectively anodal direct current and alters mutually, negative pole direct current is altered mutually, bipolar DC is altered mutually and the positive pole of direct supply I and the negative pole of direct supply II form that heteropole direct current is altered mutually and the negative pole of direct supply I and the positive pole of direct supply II formation heteropole ring), there is certain marking current, without direct current alter mutually fault electric current be 0, by the tracking to marking current, search, the position that channels to II section direct current (or channeling to I section direct current from II section direct current) from I section direct current when marking current is exactly that direct current is altered trouble spot mutually.Meanwhile, main frame, hander detect differentiation system and process, and solution travelling speed is slow, the reliable low problem of communication data.
In addition, split core type current transformer can be chosen as high-precision current transformer, and sampling precision is high, and operation stability is strong, to increase the reliability of result.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is the direct supply ring network fault monitoring that provides of the utility model and the structural representation of the embodiment of positioning system.
Fig. 2 is the structural representation of the embodiment of the current sampling circuit in Fig. 1.
Fig. 3 is wiring of the present utility model and detects sketch.
Embodiment
Please refer to Fig. 1, it is the direct supply ring network fault monitoring that provides of the utility model and the structural representation of the embodiment of positioning system, the direct current that is mainly used in direct supply I, II to independent operating is altered mutually fault and is carried out on-line monitoring and not power-off location, it mainly comprises: main frame 1, hander 2 and split core type current transformer 3, wherein, main frame 1 and hander 2 wireless connections, hander 2 and split core type current transformer 3 wired connections.
The present embodiment, when monitoring and location, can be according to carrying out wiring shown in Fig. 3.
The present embodiment, main frame Real-Time Monitoring two overlaps the direct current of direct supply I, the II of independent operating and alters mutually fault state, hander and split core type current transformer are portable, when system is altered fault mutually without direct current, be placed in instrument aluminium case, when two sections of direct supplys occur that direct current is altered fault mutually, main frame applies a direct current and alters mutually characteristic signal on the feeder assembly that has direct current to alter mutually, now open again hander, the signal that Receiving Host sends, and coordinate split core type current transformer, all feeder assemblies to two cover direct supplys detect, detect the marking current in each loop, if this loop has direct current to alter mutually fault, there is certain marking current, without direct current alter mutually fault electric current be 0, by the tracking to marking current, search, the position that channels to II section direct current (or channeling to I section direct current from II section direct current) from I section direct current when marking current is exactly that direct current is altered trouble spot mutually.
The present embodiment, detectable direct current is altered mutually fault and is comprised: the positive pole of direct supply I, negative pole, positive negative bipolar form with positive pole, negative pole, the positive negative bipolar of direct supply II respectively that anodal direct current is altered mutually, negative pole direct current is altered mutually, bipolar DC is altered mutually respectively and the positive pole of direct supply I and the negative pole of direct supply II form that heteropole direct current is altered mutually and the negative pole of direct supply I and the positive pole of direct supply II formation heteropole ring.
The present embodiment, main frame, hander are processed detecting differentiation, and solution travelling speed is slow, the reliable low problem of communication data.
The present embodiment, the present embodiment can be widely used in the DC power system such as power plant, transformer station, chemical industry, telecommunication, also can be used for the research to DC power system operation conditions such as direct current cabinet, accumulator production enterprise, research institutions etc.
Continue as shown in Figure 1, main frame 1 mainly comprises: switching bridge circuit 11, balance bridge circuit I 12, II13, voltage sampling circuit I14, II15, processor I16 and wireless signal transtation mission circuit 17.
Wherein, processor I16 is connected with voltage sampling circuit I14, II15 and wireless signal transtation mission circuit 17 respectively, balance bridge circuit I 12 is connected between the positive and negative terminal of direct supply I, after switching bridge circuit 11 and balance bridge circuit II13 parallel connection, be connected between the positive and negative terminal of direct supply II, voltage sampling circuit I14 and direct supply I positive and negative, terminal (+KM1, GND,-KM1) connect, voltage sampling circuit II15 and direct supply II positive and negative, terminal (+KM2, GND ,-KM2) connect.
The present embodiment, main frame 1 can also comprise: control button I, the LCDs I, LED light and the hummer that are connected with described processor I16, for realizing the functions such as control, demonstration, indication and warning.
The present embodiment, processor I16 controls switching bridge circuit 11 and balance bridge circuit I 12, II13 collaborative work, to operate in different duties, for accurately gathering two cover direct supply voltage-to-grounds, provide necessary data condition, and by voltage sampling circuit I14, II15, under multiple different state, gather the multi-group data of direct supply I, II, with the direct current of accurate Calculation direct supply, alter mutually state.
The present embodiment, because main frame 1 has the function of two sections of independent operating straight-flow systems of monitoring, for therefore two sections of straight-flow systems that solve independent operating do not form looped network, processor I16 by two sub-control CPU of master cpu and two sections totally three CPU form.
The present embodiment, in order to guarantee the isolation completely of forceful electric power, switching bridge is two independently identical compositions with balance bridge circuit, voltage sampling circuit.
The present embodiment, two sections of straight-flow systems of a host monitor, when having ring network fault to occur, can return switching bridge, the balance bridge of II section automatically, get rid of one section of system because looped network causes 2 artificial earthings' situation.
The present embodiment, voltage sampling circuit I for by I section DC bus (being direct supply I)+KM1 voltage acquisition by electric resistance partial pressure, then amplify by opto-coupler chip U isolation, the AD port that then enters CPU gathers.-KM1 voltage acquisition also passes through electric resistance partial pressure, then amplify by opto-coupler chip U isolation, and the AD port that then enters CPU gathers.Voltage-to-ground gathers and passes through resistance R 112, R113 dividing potential drop, then amplifies by opto-coupler chip U isolation, and the AD port that then enters CPU gathers.
The present embodiment, voltage sampling circuit II for II section DC bus (being direct supply II)+KM2 voltage acquisition by electric resistance partial pressure, then amplify by opto-coupler chip U isolation, the AD port that then enters CPU gathers.-KM2 voltage acquisition by electric resistance partial pressure, then amplify by opto-coupler chip U isolation, then amplifies the AD port that enters CPU and gathers.Voltage-to-ground gathers and passes through electric resistance partial pressure, then amplifies by opto-coupler chip U isolation, and the AD port that then enters CPU gathers.
Continue as shown in Figure 1, hander 2 mainly comprises: wireless signal receiving circuit 21, processor II22 and current sampling circuit 23, the output of wireless signal receiving circuit 21 and current sampling circuit 23 is connected to respectively processor II22, and the input of current sampling circuit 23 is connected with the output of split core type current transformer 3.
The present embodiment, hander 2 can also comprise: the control button II being connected with processor II22 and LCDs II, for realizing the functions such as control, demonstration.
The present embodiment, wireless signal receiving circuit 21 is for coordinating with wireless signal transtation mission circuit 17, realize the information interaction between main frame 1 and hander 2, and wireless signal receiving circuit 17 and wireless signal transtation mission circuit 21 can use 2.4GHz frequency range to carry out the sending and receiving of wireless signal, to guarantee enough communication distances and stability.
The present embodiment, when existing direct current to alter fault mutually, the signal that wireless signal receiving circuit 21 Receiving Hosts are uploaded, by current sampling circuit 23, split core type current transformer 3 is detected to the data of each feeder assembly amplify processing, then by the direct current of its feeder line mutually the situation of altering be presented in LCDs.
The present embodiment, current sampling circuit 23 can adopt two core shielding lines to be connected with split core type current transformer 3.
As shown in Figure 2, current sampling circuit 23 can comprise: resistance R 1, R2, R3, R4, R5, R6, R7, capacitor C 1, C2, C3, with operational amplifier LM1, LM2, described R1 is serially connected between the inverting input and ground of described LM1, the two ends of described R2 connect respectively the inverting input of the first datum and described LM1, described R3 is serially connected between the in-phase input end and ground of described LM1, after described R4 and C1 parallel connection, be serially connected between the output terminal and inverting input of described LM1, after described C2 and R5 series connection, be serially connected between the output terminal of described LM1 and the inverting input of LM2, the in-phase input end of described LM2 connects the second datum, after described R6 and C2 parallel connection, be serially connected between the output terminal and inverting input of described LM2, one end of described R7 is connected with the output terminal of described LM2, the other end is as the output of described current sampling circuit, described C3 one end ground connection, the other end connects with respect to the one end being connected with the output terminal of described LM2 with described R7.
The present embodiment, the precision of resistance R 1, R2, R3, R4, R5, R6, R7 is controlled in 0.1%, by the precision of controlling resistance, can improve the sampling precision of split core type current transformer 3, make the precision of the signal that split core type current transformer 3 feeds back higher, thereby improve direct current and alter mutually the precision of localization of fault.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (6)
1. a direct supply ring network fault is monitored and positioning system, for the direct current of direct supply I, II to independent operating, altering mutually fault monitors and locates, comprise main frame, hander and split core type current transformer, described main frame and hander wireless connections, described hander and split core type current transformer wired connection, is characterized in that:
Described main frame comprises switching bridge circuit, balance bridge circuit I, II, voltage sampling circuit I, II, processor I and wireless signal transtation mission circuit, described processor I respectively with voltage sampling circuit I, II is connected with wireless signal transtation mission circuit, described balance bridge circuit I is just being connected to direct supply I, between negative terminal, after described switching bridge circuit and balance bridge circuit II parallel connection, be just connected to direct supply II, between negative terminal, described voltage sampling circuit I and described direct supply I are just, negative, ground terminal connects, described voltage sampling circuit II and described direct supply II are just, negative, ground terminal connects,
Described hander comprises wireless signal receiving circuit, processor II and current sampling circuit, the output of described wireless signal receiving circuit and current sampling circuit is connected to respectively described processor II, and the input of described current sampling circuit is connected with the output of described split core type current transformer.
2. direct supply ring network fault monitoring as claimed in claim 1 and positioning system, is characterized in that: described main frame also comprises: control button I, the LCDs I, LED light and the hummer that are connected with described processor I.
3. direct supply ring network fault monitoring as claimed in claim 1 and positioning system, is characterized in that: described hander also comprises: the control button II and the LCDs II that are connected with described processor II.
4. direct supply ring network fault monitoring as claimed in claim 1 and positioning system, is characterized in that: described current sampling circuit adopts two core shielding lines to be connected with split core type current transformer.
5. the monitoring of the direct supply ring network fault as described in any one in claim 1-4 and positioning system, it is characterized in that: described current sampling circuit comprises: resistance R 1, R2, R3, R4, R5, R6, R7, capacitor C 1, C2, C3, with operational amplifier LM1, LM2, described R1 is serially connected between the inverting input and ground of described LM1, the two ends of described R2 connect respectively the inverting input of the first datum and described LM1, described R3 is serially connected between the in-phase input end and ground of described LM1, after described R4 and C1 parallel connection, be serially connected between the output terminal and inverting input of described LM1, after described C2 and R5 series connection, be serially connected between the output terminal of described LM1 and the inverting input of LM2, the in-phase input end of described LM2 connects the second datum, after described R6 and C2 parallel connection, be serially connected between the output terminal and inverting input of described LM2, one end of described R7 is connected with the output terminal of described LM2, the other end is as the output of described current sampling circuit, described C3 one end ground connection, the other end connects with respect to the one end being connected with the output terminal of described LM2 with described R7.
6. direct supply ring network fault monitoring as claimed in claim 5 and positioning system, is characterized in that: the precision of described resistance R 1, R2, R3, R4, R5, R6, R7 is in 0.1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320699316.5U CN203561724U (en) | 2013-11-06 | 2013-11-06 | DC power source crosstalk fault monitoring and positioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320699316.5U CN203561724U (en) | 2013-11-06 | 2013-11-06 | DC power source crosstalk fault monitoring and positioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203561724U true CN203561724U (en) | 2014-04-23 |
Family
ID=50511438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320699316.5U Expired - Lifetime CN203561724U (en) | 2013-11-06 | 2013-11-06 | DC power source crosstalk fault monitoring and positioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203561724U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391256A (en) * | 2014-12-03 | 2015-03-04 | 浙江科畅电子有限公司 | Direct-current power supply looped network fault diagnosis device |
| CN105044519A (en) * | 2015-08-06 | 2015-11-11 | 国网上海市电力公司 | On-line identification method for DC interconnection and mixed use of transformer station |
| CN105988088A (en) * | 2015-01-30 | 2016-10-05 | 深圳奥特迅电力设备股份有限公司 | Method and system for detecting DC bus branch crossing |
| CN107064822A (en) * | 2017-01-04 | 2017-08-18 | 贵阳英纳瑞电气有限公司 | Two sections of direct currents of straight-flow system mutually alter monitoring and mutually alter a Search and Orientation method |
| CN109143114A (en) * | 2018-08-01 | 2019-01-04 | 深圳市泰昂能源科技股份有限公司 | A kind of direct current mutually alters fault detection means and method |
| CN110959120A (en) * | 2017-07-25 | 2020-04-03 | 西门子交通有限公司 | Method and device for fault location along an energy supply line in a direct current system |
| CN111650450A (en) * | 2020-04-03 | 2020-09-11 | 杭州奥能电源设备有限公司 | Identification method based on direct current mutual string identification device |
| CN112904241A (en) * | 2021-01-27 | 2021-06-04 | 广东电网有限责任公司 | Ring network fault finding method, device and system |
| CN106546825B (en) * | 2016-09-29 | 2022-07-01 | 北京国电光宇机电设备有限公司 | Intelligent wireless transmission micro-opening self-zero-drift correction microcomputer insulation comprehensive detection system |
-
2013
- 2013-11-06 CN CN201320699316.5U patent/CN203561724U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391256A (en) * | 2014-12-03 | 2015-03-04 | 浙江科畅电子有限公司 | Direct-current power supply looped network fault diagnosis device |
| CN105988088A (en) * | 2015-01-30 | 2016-10-05 | 深圳奥特迅电力设备股份有限公司 | Method and system for detecting DC bus branch crossing |
| CN105988088B (en) * | 2015-01-30 | 2018-12-04 | 深圳奥特迅电力设备股份有限公司 | A kind of method and system that detection DC bus branch is mutually altered |
| CN105044519A (en) * | 2015-08-06 | 2015-11-11 | 国网上海市电力公司 | On-line identification method for DC interconnection and mixed use of transformer station |
| CN105044519B (en) * | 2015-08-06 | 2017-10-17 | 国网上海市电力公司 | A kind of transforming plant DC interconnection, mixed on-line identification method |
| CN106546825B (en) * | 2016-09-29 | 2022-07-01 | 北京国电光宇机电设备有限公司 | Intelligent wireless transmission micro-opening self-zero-drift correction microcomputer insulation comprehensive detection system |
| CN107064822A (en) * | 2017-01-04 | 2017-08-18 | 贵阳英纳瑞电气有限公司 | Two sections of direct currents of straight-flow system mutually alter monitoring and mutually alter a Search and Orientation method |
| CN110959120A (en) * | 2017-07-25 | 2020-04-03 | 西门子交通有限公司 | Method and device for fault location along an energy supply line in a direct current system |
| US11500006B2 (en) | 2017-07-25 | 2022-11-15 | Siemens Mobility GmbH | Method and device for locating faults along an energy supply chain for DC current systems |
| CN110959120B (en) * | 2017-07-25 | 2022-10-11 | 西门子交通有限公司 | Method and device for fault location along an energy supply line in a direct current system |
| CN109143114A (en) * | 2018-08-01 | 2019-01-04 | 深圳市泰昂能源科技股份有限公司 | A kind of direct current mutually alters fault detection means and method |
| CN109143114B (en) * | 2018-08-01 | 2021-11-02 | 深圳市泰昂能源科技股份有限公司 | Direct current mutual crossing fault detection device and method |
| CN111650450B (en) * | 2020-04-03 | 2022-07-15 | 杭州奥能电源设备有限公司 | Identification method based on direct current mutual string identification device |
| CN111650450A (en) * | 2020-04-03 | 2020-09-11 | 杭州奥能电源设备有限公司 | Identification method based on direct current mutual string identification device |
| CN112904241A (en) * | 2021-01-27 | 2021-06-04 | 广东电网有限责任公司 | Ring network fault finding method, device and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203561724U (en) | DC power source crosstalk fault monitoring and positioning system | |
| CN103983885A (en) | Low-voltage circuit fault locating terminal and method used for power distribution substation region | |
| CN105510773A (en) | Earth fault detection device for direct current system | |
| CN203324380U (en) | Direct-current source system insulation monitoring apparatus and monitoring host thereof | |
| CN203688090U (en) | Online cable temperature monitoring system | |
| CN102855729A (en) | Residual current type electric fire monitoring system capable of self-supplying power | |
| CN102914725A (en) | Medium-voltage power distribution network fault monitoring device | |
| CN103472356A (en) | Cable type fault detector | |
| CN203479952U (en) | Cable type fault detector | |
| CN204761165U (en) | Monitored control system is synthesized to rural power grid operation state | |
| CN204256103U (en) | A kind of monitoring system of the transmission line travelling wave localization of fault based on mobile Internet | |
| CN203519793U (en) | Non-contact remote monitoring system for PT fuses | |
| CN103675606A (en) | Bridge type direct-current fault monitoring alarm | |
| CN202153246U (en) | Direct current system grounding and ring network fault positioning system | |
| CN104730428A (en) | Alternating current and direct current online insulating monitoring device and system | |
| CN204374358U (en) | Distribution line intelligent trouble Precise Position System | |
| CN202814597U (en) | High-voltage power transmission line temperature measuring system | |
| CN104483591A (en) | Power transmission line traveling wave fault location monitoring device | |
| CN210572698U (en) | Self-checking device based on battery data acquisition | |
| CN205941794U (en) | Adjustment device of direct current system generating line voltage -to -ground | |
| CN205246805U (en) | Low pressure distribution lines on -line monitoring system | |
| CN202949282U (en) | System for remotely monitoring a plurality of intelligent circuit breakers of low-voltage intelligent switch cabinets | |
| CN204408027U (en) | A kind of Intelligent power distribution system | |
| CN203759529U (en) | Intelligent power facility monitoring system | |
| CN207426804U (en) | A kind of long-range distribution network systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140423 |
|
| CX01 | Expiry of patent term |