CN203720293U - Device used for monitoring DC insulation bus interaction - Google Patents
Device used for monitoring DC insulation bus interaction Download PDFInfo
- Publication number
- CN203720293U CN203720293U CN201320879076.7U CN201320879076U CN203720293U CN 203720293 U CN203720293 U CN 203720293U CN 201320879076 U CN201320879076 U CN 201320879076U CN 203720293 U CN203720293 U CN 203720293U
- Authority
- CN
- China
- Prior art keywords
- bus
- mutually
- interaction
- connection
- sections
- 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
- 238000009413 insulation Methods 0.000 title abstract description 23
- 238000012544 monitoring process Methods 0.000 title abstract description 4
- 230000003993 interaction Effects 0.000 title abstract 8
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000004891 communication Methods 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims description 12
- 238000012806 monitoring device Methods 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a device used for monitoring DC insulation bus interaction. The device includes two DC grounding insulation monitoring devices respectively installed on two DC buses operating independently. Wire connection is performed according to a form of DC bus interaction. The DC grounding insulation monitoring devices receive balance bridge resistance of each other and monitor grounding resistance values of each other. A group of communication lines for data communication is arranged between the two DC grounding insulation monitoring devices operating independently. The two DC grounding insulation monitoring devices obtain related measurement datum through receiving the datum from a collecting module via the communication lines. Whether DC interaction corresponding to the form of DC bus interaction occurs or not can be judged based on the measurement datum. By adopting the device, whether DC interaction occurs or not can be monitored accurately and warnings concerning to DC circuits having DC interaction can be sent and two loops having DC bus interaction can be checked and found accurately.
Description
Technical field
The utility model relates to power system insulation supervision technical field, in particular, relates to a kind of method and device that D.C. isolation bus is altered mutually of supervising.
Background technology
In electric system, in order to guarantee the needs of direct supply to substation safety operation, be usually provided with two sections of independently direct supplys, and two sections of direct currents of same transformer station are that requirement separates independent operating.In operational process, because can causing two sections of buses conventionally, wiring error or ageing equipment there is the connection on electric, i.e. two sections of buses phenomenon of handing in hand.
Connection on the easy appearance of existing straight-flow system is electric, i.e. 2 grounding phenomenons.2 grounding phenomenons usually normal operation of relay protection of Hui Dui transformer station cause certain danger.Therefore, adopt two sections of buses of multimeter monitoring whether connection occurs to alter mutually, cannot accurately monitor out and whether direct current occurs alter mutually, also cannot carry out accurate alarm, more cannot search accurately two sections of loops that DC bus is altered mutually occur.
Therefore, the invention provides a kind of device that D.C. isolation bus is altered mutually of supervising, accurately monitor out and whether direct current occurs alter mutually, to there is the DC line that direct current alters mutually, carry out alarm, and search accurately two sections of loops that DC bus is altered mutually of generation, be those skilled in the art's problem demanding prompt solutions.
Utility model content
In view of this, the utility model provides a kind of device that D.C. isolation bus is altered mutually of supervising, because available technology adopting multimeter is monitored, cannot accurately monitor out and whether direct current occurs alter mutually, to there is the DC line that direct current alters mutually, carry out alarm, and search accurately the problem that the loop that two sections of DC buss alter mutually occurs.
For achieving the above object, the utility model provides following technical scheme:
Supervise the device that D.C. isolation bus is altered mutually, comprising:
Be separately positioned on two DC earthing insulating monitors on the DC bus of two sections of independent operatings, between described two DC earthing insulating monitors, by connection, be connected, and carry out data communication;
Be arranged on two groups of balance bridge resistance between DC bus anode and negative terminal;
Be connected by connection with described DC earthing insulating monitor, receive and gather the acquisition module of the measurement of correlation data of obtaining.
Wherein, described connection is RS584 connection.
Known via above-mentioned technical scheme, compared with prior art, the utility model openly provides a kind of device that D.C. isolation bus is altered mutually of supervising, and this device comprises that the DC bus of two sections of independent operatings installs respectively two DC earthing insulating monitors separately; The mode of altering mutually according to generation DC bus is carried out wiring, and two DC earthing insulating monitors are inputted respectively the other side's balance bridge resistance, mutually monitor the other side's stake resistance resistance; Between two DC earthing insulating monitors of each self-operating, one group of connection is set, carries out data communication; Two DC earthing insulating monitors receive acquisition module by connection respectively and obtain measurement of correlation data; According to measurement data, determine whether that direct current corresponding to mode that occurs to alter mutually with DC bus alter mutually, by the present invention, can accurately monitor out and whether direct current occurs alter mutually, the DC line that generation direct current is altered is mutually carried out alarm, and searches accurately two sections of loops that DC bus is altered mutually of generation.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 is the disclosed a kind of apparatus structure schematic diagram that D.C. isolation bus is altered mutually of supervising of the embodiment of the present invention;
Fig. 2 is the wiring diagram that the embodiment of the present invention disclosed first paragraph bus negative terminal and second segment bus negative terminal are altered mutually;
Fig. 3 is the wiring diagram that the embodiment of the present invention disclosed first paragraph bus anode and second segment bus anode are altered mutually;
Fig. 4 is the embodiment of the present invention disclosed first paragraph bus anode and second segment bus anode, the wiring diagram that first paragraph bus negative terminal and second segment bus negative terminal are altered simultaneously mutually;
Fig. 5 is the wiring diagram that the embodiment of the present invention disclosed first paragraph bus negative terminal and second segment bus anode are altered mutually.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model discloses a kind of device that D.C. isolation bus is altered mutually of supervising, this device comprises that the DC bus of two sections of independent operatings installs respectively two DC earthing insulating monitors separately; The mode of altering mutually according to generation DC bus is carried out wiring, and two DC earthing insulating monitors are inputted respectively the other side's balance bridge resistance, mutually monitor the other side's stake resistance resistance; Between two DC earthing insulating monitors of each self-operating, one group of connection is set, carries out data communication; Two DC earthing insulating monitors receive acquisition module by connection respectively and obtain measurement of correlation data; According to measurement data, determine whether that direct current corresponding to mode that occurs to alter mutually with DC bus alter mutually, by the present invention, can accurately monitor out and whether direct current occurs alter mutually, the DC line that generation direct current is altered is mutually carried out alarm, and searches accurately two sections of loops that DC bus is altered mutually of generation.
Referring to accompanying drawing 1, is the disclosed a kind of apparatus structure schematic diagram that D.C. isolation bus is altered mutually of supervising of the embodiment of the present invention.The embodiment of the invention discloses a kind of device that D.C. isolation bus is altered mutually of supervising, concrete this device comprises: be separately positioned on two the DC earthing insulating monitors 101 and 102 on the DC bus of two sections of independent operatings, between described two DC earthing insulating monitors, by connection 103, be connected, and carry out data communication; Be arranged on two groups of balance bridge resistance 104 between DC bus anode and negative terminal; By connection 103, be connected with 102 with described DC earthing insulating monitor 101, receive and gather the acquisition module 105 of the measurement of correlation data of obtaining.
Preferably, connection described above is RS584 connection.
Concrete, refer to accompanying drawing 3, the wiring diagram of altering mutually for the embodiment of the present invention disclosed first paragraph bus negative terminal and second segment bus negative terminal.As shown in Figure 3, the DC bus of two sections of independent operatings is installed respectively two DC earthing supervisory devices separately, when having occurred that two sections of DC buss occur to alter mutually, two separately the insulating monitor of independent operating will there is direct current and alter mutually warning.When altering mutually appears in two sections of DC loop of independent operating, conventionally occur, two insulating monitors 1 and insulating monitoring 2 input the other side's balance resistance bridge monitors right stake resistance resistance mutually.In addition, have one group of RS584 communication interface between two direct current supervisory devices of each self-operating, this group communication interface is also applied many subordinate machine systems of master-slave structure simultaneously.
From the above mentioned, as shown in Figure 2, when separately independently direct supply there is direct current and altered mutually, the A in figure is connected with B, insulating monitor 1 insulation detects as negative busbar 60k ground connection, and insulating monitor 2 insulation detect as negative busbar 60k ground connection, and both sides communicate by letter by RS485, when two instruments are respectively received the other side's measurement of correlation data, Measurement accuracy is also judged and is altered mutually to direct current.Both sides start branch road simultaneously and patrol and examine, and the branch road 1 that just can inquire of insulation detection device 1 is 60k ground connection, and insulation detection device 2 is also looked into and patrolled branch road 1 for 60k resistance eutral grounding, regards as the negative pole of these two branch roads and alters mutually.Wherein, it should be noted that: branch road 1 may be arbitrary loop, at this, just presses the loop 1 shown in figure, should be any loop.
Concrete, refer to accompanying drawing 3, the wiring diagram of altering mutually for the embodiment of the present invention disclosed first paragraph bus anode and second segment bus anode.As shown in Figure 3, when separately independently direct supply there is direct current and altered mutually, the A in figure is connected with B, insulating monitor 1 insulation detects as positive bus-bar 60k ground connection, insulating monitor 2 insulation detect as positive bus-bar 60k ground connection, both sides communicate by letter by RS485, and when two instruments are respectively received the other side's measurement of correlation data, Measurement accuracy is also judged and altered mutually to direct current.Both sides start branch road simultaneously and patrol and examine, and the branch road 1 that just can inquire of insulation detection device 1 is 60k ground connection, and insulation detection device 2 is also looked into and patrolled branch road 1 for 60k ground connection.We regard as the negative pole of these two branch roads and alter mutually.Wherein, it should be noted that: branch road 1 may be arbitrary loop, and we just press the loop 1 shown in figure, should be any loop.
Concrete, refer to accompanying drawing 4, be the embodiment of the present invention disclosed first paragraph bus anode and second segment bus anode, the wiring diagram that first paragraph bus negative terminal and second segment bus negative terminal are altered simultaneously mutually.When there is positive and negative electrodes in same in two sections of buses as shown in Figure 4, this phenomenon of mutual connection namely two sections of buses just there are two insulating monitors of one section of bus.Two earth points will phase mutual interference, and what any voltage difference two instruments usually there will not be, and the voltage-to-ground separately of two sections of buses is just the same.When the busbar voltage of two sections of buses is different, just can there is the variant phenomenon of voltage.
When separately independently direct supply there is direct current and altered mutually, the A in figure is connected with C, B is connected with D, insulating monitor 1 insulation detects as positive bus-bar 60k ground connection, and negative busbar is also negative stake resistance 60k simultaneously, and insulating monitor 2 insulation detect as positive bus-bar 60k ground connection, negative busbar is also negative stake resistance 60k simultaneously, both sides communicate by letter by RS485, and two instruments respectively receive that the other side's measurement of correlation data enter exchange, and two instruments also just alter mutually to direct current separately by Measurement accuracy judgement.Both sides start branch road simultaneously and patrol and examine, and the branch road 1 that just can inquire of insulation detection device 1 is 30k ground connection, and insulation detection device 2 is also looked into and patrolled branch road 1 for 30k ground connection.We regard as the negative pole of these two branch roads and alter mutually, be at this moment two resistance and connect grounding resistance, be not at this moment that resistance to earth is 60K.Wherein, need to say the people: branch road 1 may be arbitrary loop, and we just press the loop 1 shown in figure, should be any loop.
Concrete, refer to accompanying drawing 5, the wiring diagram of altering mutually for the embodiment of the present invention disclosed first paragraph bus negative terminal and second segment bus anode.As shown in Figure 5, this phenomenon, we only list two kinds of phenomenons: the straight-flow system of four: two sections of independent operatings of phenomenon has occurred that first paragraph bus negative terminal and second segment bus anode alter mutually.The straight-flow system of five: two sections of independent operatings of phenomenon has occurred that first paragraph bus anode and second segment bus negative terminal alter mutually.These two we merge into phenomenon four and be illustrated.The DC bus of two sections of independent operatings has occurred that opposed polarity alters mutually.This phenomenon is less generation, and when it occurs in same duplexure, two duplexures there will be larger electric current.Formed maximum danger, the excessive protective breaker that conventionally can cause of its electric current moves.So only to there is altering and explain mutually of opposed polarity in us.With first paragraph bus negative terminal and second segment bus anode, alter mutually as example.
As shown in Figure 5, when separately independently direct supply there is direct current and altered mutually, the B in figure is connected with C, or A is connected with D, insulating monitor 1 insulation detects as negative busbar 60k resistance eutral grounding, and insulating monitor 2 insulation detect as positive bus-bar 60k resistance eutral grounding, and both sides communicate by letter by RS485, two instruments respectively receive that the other side's measurement of correlation data enter exchange, and two instruments also just alter mutually to direct current separately by Measurement accuracy judgement.Both sides start branch road simultaneously and patrol and examine, and the branch road 1 that just can inquire of insulation detection device 1 is 60k ground connection, and insulation detection device 2 is also looked into and patrolled branch road 1 for 60k ground connection.We regard as the opposed polarity of these two branch roads and alter mutually, and at this moment resistance to earth is 60K.Wherein, it should be noted that: branch road 1 may be arbitrary loop, and we just press the loop 1 shown in figure, should be any loop.
In sum: the invention discloses a kind of method and device that D.C. isolation bus is altered mutually of supervising, the method comprises: the DC bus of two sections of independent operatings is installed respectively two DC earthing insulating monitors separately; The mode of altering mutually according to generation DC bus is carried out wiring, and two DC earthing insulating monitors are inputted respectively the other side's balance bridge resistance, mutually monitor the other side's stake resistance resistance; Between two DC earthing insulating monitors of each self-operating, one group of connection is set, carries out data communication; Two DC earthing insulating monitors receive acquisition module by connection respectively and obtain measurement of correlation data; According to measurement data, determine whether that direct current corresponding to mode that occurs to alter mutually with DC bus alter mutually, by the present invention, can accurately monitor out and whether direct current occurs alter mutually, the DC line that generation direct current is altered is mutually carried out alarm, and searches accurately two sections of loops that DC bus is altered mutually of generation.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (2)
1. supervise the device that D.C. isolation bus is altered mutually, it is characterized in that, comprising:
Be separately positioned on two DC earthing insulating monitors on the DC bus of two sections of independent operatings, between described two DC earthing insulating monitors, by connection, be connected, and carry out data communication;
Be arranged on two groups of balance bridge resistance between DC bus anode and negative terminal;
Be connected by connection with described DC earthing insulating monitor, receive and gather the acquisition module of the measurement of correlation data of obtaining.
2. device according to claim 1, is characterized in that, described connection is RS584 connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879076.7U CN203720293U (en) | 2013-12-27 | 2013-12-27 | Device used for monitoring DC insulation bus interaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879076.7U CN203720293U (en) | 2013-12-27 | 2013-12-27 | Device used for monitoring DC insulation bus interaction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203720293U true CN203720293U (en) | 2014-07-16 |
Family
ID=51159434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320879076.7U Expired - Lifetime CN203720293U (en) | 2013-12-27 | 2013-12-27 | Device used for monitoring DC insulation bus interaction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203720293U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698651A (en) * | 2013-12-27 | 2014-04-02 | 国家电网公司 | Method and device for monitoring crossing of direct current insulated buses |
| CN104678341A (en) * | 2015-03-06 | 2015-06-03 | 国网四川省电力公司电力科学研究院 | Detection device and detection method for station-dedicated DC power system insulation monitoring 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 |
-
2013
- 2013-12-27 CN CN201320879076.7U patent/CN203720293U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698651A (en) * | 2013-12-27 | 2014-04-02 | 国家电网公司 | Method and device for monitoring crossing of direct current insulated buses |
| CN103698651B (en) * | 2013-12-27 | 2016-05-11 | 国家电网公司 | A kind ofly supervise method and the device that D.C. isolation bus is altered mutually |
| CN104678341A (en) * | 2015-03-06 | 2015-06-03 | 国网四川省电力公司电力科学研究院 | Detection device and detection method for station-dedicated DC power system insulation monitoring 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 |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103698651B (en) | A kind ofly supervise method and the device that D.C. isolation bus is altered mutually | |
| CN106597213B (en) | Distributed electric line upkeep operation safeguard protection digitized monitoring system | |
| CN103116107A (en) | High voltage direct current power source insulation monitoring device | |
| CN205067643U (en) | Direct current system's of transformer substation distributed insulation monitoring and warning device | |
| CN103558502B (en) | Single-phase earth fault detection circuit, method and system | |
| CN102590676A (en) | Device and method for detecting fault of direct current looped network of direct current power supply system | |
| CN103792505A (en) | Ground fault simulation device for electric power direct current system | |
| CN203561717U (en) | Distribution board direct current ground connection alarm device | |
| CN112540259A (en) | Distribution network disconnection fault identification method and system suitable for intelligent power distribution terminal | |
| CN203720293U (en) | Device used for monitoring DC insulation bus interaction | |
| CN110542829A (en) | direct-current grounding judgment device and method for power distribution network below 35kV | |
| CN104330686A (en) | System for detecting power supply circuit fault | |
| CN203572909U (en) | Single-phase ground fault detection circuit and system | |
| CN105044575A (en) | High-voltage direct-current power distribution insulation-against-ground monitoring device | |
| CN111766476A (en) | Rapid networking and fault early warning device for bypass cable monitoring and early warning method thereof | |
| CN203350349U (en) | Transformer substation bus phase voltage off-limit alarm system | |
| CN204719178U (en) | A kind of switch cubicle arc light/Partial discharge detector | |
| CN207074818U (en) | A kind of intelligent GIS and Intelligent component cabinet | |
| CN104020393B (en) | A kind of with electrical network one-phase short-circuit current Fault Locating Method | |
| CN108051693A (en) | A kind of method of the raising earth fault judgment accuracy based on TAS devices | |
| CN105182157A (en) | Neutral point multi-point grounding detection device based on high-accuracy detection current | |
| CN211123208U (en) | Direct-current ground fault finding experimental platform for DCS (distributed control system) of nuclear power plant | |
| CN104678756A (en) | Novel intelligent comprehensive power transformation and distribution monitoring system | |
| CN111638425A (en) | High-voltage cable fault positioning device | |
| CN103308770A (en) | Network system for power supply line impedance loss type electrical failure fire hazard detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140716 Effective date of abandoning: 20160511 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |