CN205283115U - Integration formula current limiting device - Google Patents
Integration formula current limiting device Download PDFInfo
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- CN205283115U CN205283115U CN201521065191.6U CN201521065191U CN205283115U CN 205283115 U CN205283115 U CN 205283115U CN 201521065191 U CN201521065191 U CN 201521065191U CN 205283115 U CN205283115 U CN 205283115U
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Abstract
The utility model provides an integration formula current limiting device which characterized in that: degree of depth current limiting reactor and quick switching device integration installation, and tie. Integration formula current limiting device by last insulating cylinder, degree of depth current limiting reactor, fast switch, press down steepness energy absorber, luo ke coil, control system, down insulating bucket, keep apart power, air -cooled system composition. The product incorporating the design is a switch branch, closing speed are fast, and the reactor does not need the long term through -flow, only need can avoid energy losses during normal operating according to satisfying the thermally stable and vertically insulating design of turn to turn of moving in short -term of short circuit impulse current, can guarantee the integrated form current limiting device of current -limiting effect during short -circuit fault.
Description
Technical field
This utility model relates to electrical equipment technical field, is specifically related to a kind of current-limiting reactor and high-speed switch combination type protection current-limiting apparatus.
Background technology
Restriction to short circuit current at present, main employing is will to seal in the middle of major loop by current-limiting reactor through-flow and that meet the design of short circuit current dynamic and thermal stability mixed principle when meeting long, to ensure when system is short-circuited, directly the short circuit current flowing through reactor is limited.
According to meet under system nominal current long time through-flow and meet the current-limiting reactor of the design of dynamic and thermal stability mixed principle under short circuit current and there is problems in that the coiling of 1. reactor or copper/aluminum row's current-carrying cross section is long-pending requires very big, this volume and weight having resulted in current-limiting reactor is very big; When 2. identical reactance value, current-carrying cross section is long-pending, and also to have resulted in very greatly the cost of reactor significantly high; 3. in order to meet actual production and the feasibility of in-site installation operation, considering cost, the reactance Rate having resulted in current-limiting reactor can only be accomplished within 20%, and the current limliting degree of depth is limited. During the reactor that is because must being fulfilled under system nominal current after all long, through-current capability causes, and current-limiting reactor properly functioning under system nominal current time, it is do not possess any positive sense to power system, also can bring the adverse effects such as electric energy loss, voltage drop and electromagnetic interference on the contrary. Therefore conventional current-limiting reactor technology has its defect and weak point.
Utility model content
Technical problem to be solved in the utility model is in that to provide a kind of switch point, closing speed fast, reactor is through-flow when not needing long, have only to by the dynamic and thermal stability in short-term and the turn-to-turn longitudinal direction insulating Design that meet short-circuit impact electric current, electric energy loss can be avoided time properly functioning, the integrated form current-limiting apparatus of current limitation effect during short trouble, can be ensured.
Technical problem to be solved in the utility model realizes by the following technical solutions:
A kind of integrated type current-limiting apparatus, including upper insulating cylinder, lower insulating cylinder, degree of depth current-limiting reactor, high-speed switch, press down steepness energy absorber, insulating power supply, described insulating power supply is arranged in lower insulating cylinder, described degree of depth current-limiting reactor hangs on insulating cylinder outer wall, described high-speed switch is installed in insulating cylinder, described high-speed switch is by upper, lower junction block be connected copper bar connect after, it is respectively coupled to the upper of insulating cylinder top and bottom again, lower lead-out wire, again through upper, lower lead-out wire is connected with the turnover line end of the degree of depth current-limiting reactor on upper insulating cylinder outer wall, the described steepness energy absorber that presses down is connected to the upper and lower junction block two ends of high-speed switch, maintenance joint it is provided with between described upper insulating cylinder and lower insulating cylinder, maintenance joint arranges control system, described control system is connected with the Rogowski coil on high-speed switch, after the power supply of described control system is connected with insulating power supply secondary, then is connected with external ac power source by insulating power supply primary.
The described steepness energy absorber that presses down includes acceptor of energy and steepness suppressor, and described acceptor of energy is in parallel with steepness suppressor and is connected; Described acceptor of energy includes insulating epoxy bucket, upper junction block, lower junction block, built-in disconnector, upper and lower aluminum cock, zinc oxide valve plate, described zinc oxide valve plate is positioned in the middle part of insulating epoxy bucket, described zinc oxide valve plate top is connected with built-in disconnector, bottom is connected with lower aluminum cock, being connected with lower junction block through a spring flower pad bottom described lower aluminum cock, described upper junction block, lower junction block are each through being bolted on insulating epoxy bucket; Described upper aluminum cock arranges between junction block and built-in disconnector;
Described steepness suppressor includes insulation crust, is provided with the built-in thin-film capacitor of two series connection in described insulation crust, and described insulation crust top is connected to junction block, and bottom is connected to lower junction block, and upper and lower junction block connects with thin-film capacitor.
Described acceptor of energy and steepness suppressor are connected in parallel by drawing row.
The beneficial effects of the utility model are:
(1) integrated form current-limiting reactor adopts and meets through-flow dynamic and thermal stability requirement in short-term, the parameter value according to user's field requirement current limliting depth design reactor, and its mounting means adopts to be installed with quick commutation switch equipment integrated type.
(2) the junction block two ends up and down of the high-speed switch in quick commutation switch equipment, connect and press down steepness energy absorber, its effect is, when device back segment (subordinate) is short-circuited, controller sends order makes high-speed switch action separating brake carry out the change of current, short circuit current is proceeded to reactor and carries out degree of depth current limliting, the moment of reactor it is transformed at electric current, reactor will produce the induced potential that amplitude is higher, steepness is bigger, this electromotive force acts on high-speed switch fracture two ends, it is possible to make switch blow-out difficulty or can not blow-out and cause commutation failure. After pressing down steepness energy absorber and be connected on the two ends of switch fracture, the amplitude of electromotive force can be limited, the steepness of electromotive force be limited simultaneously and reduce, with the extinguishing condition of satisfied switch fracture electric arc, it is ensured that safe and reliable cut-offs and complete the change of current.
(3) course of action of device, under normal circumstances high-speed switch close a floodgate, by with it and the degree of depth current-limiting reactor short circuit connect put into operation. when short circuit occurs, after control system is sampled by Rogowski coil and is judged the minimum working current value that current amplitude exceedes setting, controller is through the algorithm of the specific function of design, calculate short circuit current angle accurately, the zero crossing of amplitude and twice, then separating brake order is sent to high-speed switch in the ms time before the current zero-crossing point time delay a period of time, perform separating brake, when damming before current zero-crossing point and disconnecting, electric current is truncated the change of current moment to reactor, it is higher that reactor will produce amplitude, the transient overvoltage that steepness is bigger, and act on the fracture of high-speed switch, if the steepness of this overvoltage is more than the resume speed of switch internal dielectric, the resume combustion of switch fracture will be occurred can not to complete to cut-off, cause commutation failure. now, the steepness energy absorber that presses down being installed on fracture two ends plays a role, and overvoltage is limited in relatively low amplitude on the one hand, on the other hand steepness restriction is reduced to the scope having allowed to cut-off, help the success of high-speed switch Safe commutation, it is achieved the target of degree of depth current limliting.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation;
Fig. 2 is that this utility model presses down steepness energy absorber structure chart.
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with being specifically illustrating, this utility model is expanded on further.
Referring to Fig. 1, a kind of integrated type current-limiting apparatus, including upper insulating cylinder 1, lower insulating cylinder 2, degree of depth current-limiting reactor 3, high-speed switch 4, press down steepness energy absorber 5, insulating power supply 6, described insulating power supply 6 is arranged in lower insulating cylinder 2, described degree of depth current-limiting reactor 3 hangs on insulating cylinder 1 outer wall, described high-speed switch 4 is installed in insulating cylinder 1, described high-speed switch 4 is by upper, lower junction block be connected copper bar 7 connect after, it is respectively coupled to the upper lead-out wire 8 of insulating cylinder 1 top and bottom again, lower lead-out wire 9, again through upper lead-out wire 8, lower lead-out wire 9 is connected with the turnover line end of the degree of depth current-limiting reactor 3 on upper insulating cylinder 1 outer wall, the described steepness energy absorber 5 that presses down is connected to the upper and lower junction block two ends of high-speed switch 4, maintenance joint 10 it is provided with between described upper insulating cylinder 1 and lower insulating cylinder 2, maintenance joint 10 arranges control system 11, described control system 11 is connected with the Rogowski coil on high-speed switch 4, after 6 levels of the power supply of described control system 11 and insulating power supply are connected, then it is connected with external ac power source by insulating power supply 6 primary.
Referring to Fig. 2, pressing down steepness energy absorber 5 and include acceptor of energy 51 and steepness suppressor 52, acceptor of energy 51 is connected in parallel by the row of extraction 53 with steepness suppressor 52. Acceptor of energy 51 includes insulating epoxy bucket 511, upper junction block 512, lower junction block 513, built-in disconnector 514, upper aluminum cock 515, lower aluminum cock 516, zinc oxide valve plate 517, zinc oxide valve plate 517 is positioned in the middle part of insulating epoxy bucket 511, zinc oxide valve plate 517 top is connected with built-in disconnector 514, bottom is connected with lower aluminum cock 516, being connected with lower junction block 513 through a spring flower pad bottom lower aluminum cock 516, upper junction block 512, lower junction block 513 are each through being bolted on insulating epoxy bucket 511; Upper aluminum cock 515 arranges between junction block 512 and built-in disconnector 514; Steepness suppressor 52 includes insulation crust 521, is provided with the built-in thin-film capacitor of two series connection in insulation crust 521, and insulation crust 521 top is connected to junction block 522, and bottom is connected to lower junction block 523, and upper and lower junction block connects with thin-film capacitor.
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described. Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description is that principle of the present utility model is described; under the premise without departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model. This utility model claims scope and is defined by appending claims and equivalent thereof.
Claims (1)
1. an integrated type current-limiting apparatus, it is characterized in that, including upper insulating cylinder, lower insulating cylinder, degree of depth current-limiting reactor, high-speed switch, press down steepness energy absorber, insulating power supply, described insulating power supply is arranged in lower insulating cylinder, described degree of depth current-limiting reactor hangs on insulating cylinder outer wall, described high-speed switch is installed in insulating cylinder, described high-speed switch is by upper, lower junction block be connected copper bar connect after, it is respectively coupled to the upper of insulating cylinder top and bottom again, lower lead-out wire, again through upper, lower lead-out wire is connected with the turnover line end of the degree of depth current-limiting reactor on upper insulating cylinder outer wall, the described steepness energy absorber that presses down is connected to the upper and lower junction block two ends of high-speed switch, maintenance joint it is provided with between described upper insulating cylinder and lower insulating cylinder, maintenance joint arranges control system, described control system is connected with the Rogowski coil on high-speed switch, after the power supply of described control system is connected with insulating power supply secondary, then is connected with external ac power source by insulating power supply primary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521065191.6U CN205283115U (en) | 2015-12-16 | 2015-12-16 | Integration formula current limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521065191.6U CN205283115U (en) | 2015-12-16 | 2015-12-16 | Integration formula current limiting device |
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| Publication Number | Publication Date |
|---|---|
| CN205283115U true CN205283115U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521065191.6U Active CN205283115U (en) | 2015-12-16 | 2015-12-16 | Integration formula current limiting device |
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| CN (1) | CN205283115U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110349784A (en) * | 2018-08-09 | 2019-10-18 | 安徽合凯电气科技股份有限公司 | A kind of current limit switch device, system and application |
| CN112366667A (en) * | 2020-11-02 | 2021-02-12 | 西安交通大学 | Integrated fast switch type current limiter and method for matching integrated fast switch type current limiter with circuit breaker |
-
2015
- 2015-12-16 CN CN201521065191.6U patent/CN205283115U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110349784A (en) * | 2018-08-09 | 2019-10-18 | 安徽合凯电气科技股份有限公司 | A kind of current limit switch device, system and application |
| CN112366667A (en) * | 2020-11-02 | 2021-02-12 | 西安交通大学 | Integrated fast switch type current limiter and method for matching integrated fast switch type current limiter with circuit breaker |
| CN112366667B (en) * | 2020-11-02 | 2021-08-10 | 西安交通大学 | Integrated fast switch type current limiter and method for matching integrated fast switch type current limiter with circuit breaker |
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