CN202268693U - Combined grounding device of electric power system - Google Patents
Combined grounding device of electric power system Download PDFInfo
- Publication number
- CN202268693U CN202268693U CN2011204040372U CN201120404037U CN202268693U CN 202268693 U CN202268693 U CN 202268693U CN 2011204040372 U CN2011204040372 U CN 2011204040372U CN 201120404037 U CN201120404037 U CN 201120404037U CN 202268693 U CN202268693 U CN 202268693U
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- grounding
- dry
- suppression coil
- arc suppression
- thyristor
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Abstract
The utility model provides a combined grounding device of an electric power system and belongs to a field of power grid neutral point grounding facility. The combined grounding device of the electric power system includes a dry-type grounding transformer, a dry-type arc suppression coil, a grounding resistor, a breaker, a thyristor box, a combined grounding controller and an onsite control cabinet. It is characterized in that a primary side of the dry-type arc suppression coil connects with a neutral point side of the dry-type grounding transformer. The grounding resistor is connected to the neutral point side of the dry-type grounding transformer. The dry-type arc suppression coil connects with the grounding resistor in parallel. A secondary side of the dry-type arc suppression coil connects with the thyristor box and adjusts a conduction angle of the thyristor through an output signal of the combined grounding controller to compensate the continuous and infinitely variable regulation of current and control the switching state of a breaker, thereby isolating a faulty line. In the utility model, two grounding methods of arc suppression coil grounding and resistor grounding are combined to form a combined grounding method. The two grounding methods of arc suppression coil grounding and resistor grounding are in interworking and make good for deficiency, thereby improving a grounding system and guaranteeing the reliable operation of the neutral point grounding system.
Description
Technical field
The compound earthing device of the utility model electric power system belongs to neutral point of electric network ground connection facility field.
Background technology
At present, common Power Network Neutral mainly contains 4 types: 1. grounding through resistance; 2. reactance grounded; 3. earth-free and grounding through arc; 4. direct ground connection.Medium voltage distribution network mainly is made up of cable line; And along with the expansion of network system scale, capacitance current is increasing during single phase ground fault, during electrical network generation single-phase earthing; Big electric current can make the fault point arc reignition; And then the further expansion that causes the accident, as forming disconnection fault or permanent earth fault, more serious is to develop into the phase fault serious accident; Increasing instantaneous single phase ground fault can not be eliminated automatically, and the intermittent arc grounding overvoltage frequently occurs, and weak insulator arrangement in the system is constituted a threat to, and is prone to generation equipment damage accident, the safe operation of serious threat system.
Though the neutral grounding in distribution power network complicacy is various, when can't having satisfied the system failure gradually, existing grounding apparatus prevents that arc light from restriking and the route selection accuracy requirement, it is extremely urgent to optimize the neutral ground facility.
The utility model content
The purpose of the utility model provides the compound earthing device of a kind of electric power system, with further optimization earth neutral system, overcomes that system's residual flow that existing earth neutral system exists is big, blow-out slow and is prone to restrike.
The purpose technical scheme that realizes the utility model is following:
The compound earthing device of this electric power system; Comprise dry-type earth transformer, dry type arc suppression coil, earth resistance, circuit breaker, thyristor case, compound ground connection controller and on-site control, characteristics are that the dry type arc suppression coil primary side directly is connected to the dry-type earth transformer neutral point side, and earth resistance is connected to the dry-type transformer neutral point side through single-pole circuit breaker; Dry type arc suppression coil and earth resistance parallel connection; The secondary side of dry type arc suppression coil is connected with the thyristor case, through the output signal of compound ground connection controller, regulates the thyristor angle of flow; With the break-make of the adjusting of offset current continuous stepless, control circuit breaker, with the isolated fault circuit.
The input of above-mentioned compound ground connection controller inserts voltage, electric current, switching value signal respectively; The triggering signal of its output transient fault is communicated with the secondary side of thyristor case, dry type arc suppression coil, the break-make of permanent fault signal controlling circuit breaker.
Above-mentioned thyristor case and compound ground connection controller place in the on-site control.
The design forms compound ground connection with grounding through arc and two kinds of earthing modes of grounding through resistance, and the two cooperatively interacts, and gets normal benefit weak point, makes grounding system more perfect, guarantees the earth neutral system reliability service.When compound ground connection controller detected the earth fault generation, controller output triggering signal triggered the thyristor conducting, and dry type arc suppression coil is exported the high-accuracy compensation electric current immediately, reduces earth current, eliminates arc light; Eliminate when compound ground connection controller detects earth fault, recover normal condition; When compound ground connection controller detects trouble duration above behind the setting time, then control the primary cut-out auto-closing with the instantaneous input coefficient of earth resistance, utilize the outside line protective device that faulty line is tripped, the isolated fault circuit; Faulty line excision back fault disappears, and extinguishing arc withdraws from compensation automatically, and resistance is withdrawed from the automatic disconnection of resistance fling-cut switch, and equipment is out of service.
Description of drawings
Fig. 1 is the compound earthing device cutaway view of the utility model electric power system
Fig. 2 is the utility model grounding transformer sketch map
Fig. 3 is that the utility model dry type arc suppression coil is connected sketch map with on-site control
Fig. 4 is the compound ground connection control circuit of a utility model block diagram
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done and to be further described.
The primary side inlet wire 10 of the utility model dry-type earth transformer 3 is connected in main bus bar through cable or copper bar 2; Dry type arc suppression coil 4 directly is connected to dry-type earth transformer neutral point 11; Earth resistance 6 is connected on dry-type earth transformer neutral point 11 through circuit breaker 7; Dry type arc suppression coil 4 loops are parallelly connected with earth resistance 6 loops; Dry type arc suppression coil primary side 12 is connected with dry-type earth transformer neutral point 11 with copper bar 2 through cable; Dry type arc suppression coil secondary side 13 is connected with thyristor case 9 with copper bar 2 through cable; Thyristor case 9 places in the on-site control 5; The input of compound ground connection controller 8 links to each other with sampling voltage, electric current, switching value; Compound ground connection controller 8 outputs are connected through electric wire with thyristor case 9 and circuit breaker 7 respectively, and compound ground connection controller 8 sends the break-make that control signal is controlled thyristor case 9 and circuit breaker 7 respectively, and compound ground connection controller 8 places in the on-site control 5.
Claims (3)
1. the compound earthing device of electric power system; Comprise dry-type earth transformer, dry type arc suppression coil, earth resistance, circuit breaker, thyristor case, compound ground connection controller and on-site control, characteristics are that the dry type arc suppression coil primary side directly is connected to the dry-type earth transformer neutral point side, and earth resistance is connected to the dry-type transformer neutral point side through single-pole circuit breaker; Dry type arc suppression coil and earth resistance parallel connection; The secondary side of dry type arc suppression coil is connected with the thyristor case, through the output signal of compound ground connection controller, regulates the thyristor angle of flow; With the break-make of the adjusting of offset current continuous stepless, control circuit breaker, with the isolated fault circuit.
2. the compound earthing device of electric power system according to claim 1 is characterized in that the input of compound ground connection controller inserts voltage, electric current, switching value signal respectively; The triggering signal of its output transient fault is communicated with the secondary side of thyristor case, dry type arc suppression coil, and the permanent fault signal is communicated with the break-make of circuit breaker.
3. the compound earthing device of electric power system according to claim 1 is characterized in that thyristor case and compound ground connection controller place in the on-site control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204040372U CN202268693U (en) | 2011-10-21 | 2011-10-21 | Combined grounding device of electric power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204040372U CN202268693U (en) | 2011-10-21 | 2011-10-21 | Combined grounding device of electric power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202268693U true CN202268693U (en) | 2012-06-06 |
Family
ID=46159477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204040372U Expired - Lifetime CN202268693U (en) | 2011-10-21 | 2011-10-21 | Combined grounding device of electric power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202268693U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682404A (en) * | 2020-06-09 | 2020-09-18 | 广东电网有限责任公司东莞供电局 | 10kV power system neutral point movable small resistor complete grounding device |
-
2011
- 2011-10-21 CN CN2011204040372U patent/CN202268693U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682404A (en) * | 2020-06-09 | 2020-09-18 | 广东电网有限责任公司东莞供电局 | 10kV power system neutral point movable small resistor complete grounding device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LI QINGYUAN Free format text: FORMER OWNER: WUHAN LUOJIA MCR ENERGY ENGINEERING TECHNOLOGY CO., LTD. Effective date: 20150715 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150715 Address after: 512000 Guangdong Province, Shaoguan City Industrial Wujiang District No. 24 East Sunshine Kangdi B building 901 Patentee after: Li Qingyuan Address before: 430074 room 1302, building E2, Optics Valley Software Park, Hongshan District, Wuhan, Hubei Patentee before: Wuhan Luojia MCR Energy Engineering Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171208 Address after: Five Mu Creek Industrial Park 512000 Guangdong city of Shaoguan Province, Wujiang District No. nineteen Patentee after: Shaoguan Bai Rui Energy Saving Technology Co., Ltd. Address before: 512000 Guangdong Province, Shaoguan City Industrial Wujiang District No. 24 East Sunshine Kangdi B building 901 Patentee before: Li Qingyuan |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120606 |