CN203056563U - Electric network current limiting device, electric network current limiter and electric network current limiting system - Google Patents
Electric network current limiting device, electric network current limiter and electric network current limiting system Download PDFInfo
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- CN203056563U CN203056563U CN 201320010450 CN201320010450U CN203056563U CN 203056563 U CN203056563 U CN 203056563U CN 201320010450 CN201320010450 CN 201320010450 CN 201320010450 U CN201320010450 U CN 201320010450U CN 203056563 U CN203056563 U CN 203056563U
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Abstract
The utility model discloses an electric network current limiting device, an electric network current limiter and an electric network current limiting system. The electric network current limiting device comprises the following components: a first current limiting reactor; a first intelligent high-speed switch which is connected with the first current limiting reactor in parallel; a current transformer which is sleeved on a bus at one side of the parallelly connected first current limiting reactor and the first intelligent high-speed switch for monitoring the current in the bus in real time; and a controller which is connected with the current transformer and is used for switching off the first intelligent high-speed switch when the current is larger than a first preset value and switching on the first intelligent high-speed switch when the current is smaller than a second preset value, wherein the first preset value is larger than the second preset value. Through the electric network current limiting device, operation reliability of the electric network is improved. The electric network current limiting devices can be used through serial connection for limiting shortcircuit current level of the electric network with voltage of 330(500)kV or less economically and effectively.
Description
Technical field
The utility model relates to electric field, in particular to a kind of grid current limiting device and grid current limiting device and grid current limiting system.
Background technology
Because the development of electrical network, the maximum short circuit current of many area power grids has surpassed the rupturing capacity (being 63kA at present to the maximum) of circuit breaker.Be subject to this, need more effective short circuit current to cut-off technology.
Early stage domestic-developed has been developed and has been adopted explosion type quick-speed turning on-off current-carrying pontic and high-voltage and current-limitation fuse, the combined high-capacity and high-speed switch of high energy-absorbing ZnO resistors, the high-capacity and high-speed switch can namely cut-off and limits its growth at the short circuit current initial stage of rising, can be when short circuit current reaches 15% left and right sides of peak value, cutting-off of short-circuit electric current, operate time is less than 1ms, thereby avoids big short circuit current that electric equipment is impacted.The high-capacity and high-speed switch has the characteristics of rated current big (6kA), switch off time short (less than 3ms), connecting-disconnecting function strong (160kA), the withstand voltage height of fracture (36kV).But the high-capacity and high-speed switch uses some shortcomings are arranged, after the high-capacity and high-speed switch cut-offs, with the faulty line excision, some stable operations of loading that can not have a power failure are brought potential safety hazard, and the high-capacity and high-speed switch can only be installed in indoor.The case that the loss in service of domestic existing current limiting reactor and voltage reduction problem solve, all be by switch cubicle high-capacity and high-speed switch in parallel at the current limiting reactor two ends, the control of high-capacity and high-speed switch realizes at secondary side, control signal is sent the triggering signal action by insulating transformer, and the control loop power supply is provided by transformer station's 380V dynamical system.Be subjected to the restriction of insulation level, the high-capacity and high-speed switch uses in the 6-35kV hyperbaric chamber mostly, and the operation link is many, and restricted condition is many, installs and uses inconvenience, and owing to increased connection bus row's length, makes probability of malfunction and risk increase.
At present power electronic technology is adopted in the restriction of 500kV and following grid short circuit electric current mostly both at home and abroad, implementing cost is 10 times that we install, and floor space is big, and operational reliability is not high.
2008, the Ningxia DianKeYuan has proposed high-capacity and high-speed switch and the imagination of current limiting reactor in electrical network high pressure primary side formation in parallel integrated " energy-saving grid current limiting device ", and the know-why of implement device proposed, product structure and technical parameter, with the prosperous power technology of Anhui crowd Co., Ltd of Kai Li group cooperation research and development, as shown in Figure 1,1 is control unit, 2 is storage battery, 3 is nonlinear resistance, 4 is fuse, 5 is pontic, wherein, pontic 5 with the high-capacity and high-speed switch, elements such as fuse 4 and nonlinear resistance 3 are installed in the compound inslation sleeve, inversion capacitive divider by the double as insulation column is directly obtained the control system working power by electrical network high pressure primary side, measure at the high-pressure side implement device, control, the fully automatic operation that multi parameter intallingent is judged, make the application of high-capacity and high-speed switch that qualitative leap arranged, " the energy-saving grid current limiting device " succeeded in developing uses at the Ningxia 220kV 35kV of transformer station medium voltage network, correct operation when the short trouble of 35kV near region, avoid main transformer and other equipment to be subjected to the generation of excessive short-circuit current rush damaged condition, guaranteed system safety stable operation.Change element but needing after the high-capacity and high-speed switch explosive bridge in the energy-saving grid current limiting device cut-offs has a power failure, caused the not high problem of operation of power networks reliability.
At the not high problem of operation of power networks reliability in the prior art, effective solution is not proposed as yet at present.
The utility model content
Main purpose of the present utility model is to provide a kind of grid current limiting device, grid current limiting device and grid current limiting system, to solve the not high problem of operation of power networks reliability in the prior art.
To achieve these goals, according to an aspect of the present utility model, provide a kind of grid current limiting device, having comprised:
First current limiting reactor; The first intelligent high-speed switch, in parallel with this first current limiting reactor; Current transformer is sleeved on the bus of the side after this first current limiting reactor and this first intelligent high-speed switch in parallel, is used for the electric current of this bus of monitoring in real time; And controller, be connected with this current transformer, be used for when this electric current during greater than first preset value, controlling this first intelligent high-speed switch disconnects, and when this electric current during less than this second preset value, control this first intelligent high-speed switch closure, this first preset value is greater than this second preset value.
Further, this device also comprises:
First contactor is with this first intelligent high-speed switch in parallel; This controller is also for detection of the state of this first intelligent high-speed switch, and when this first intelligent high-speed switch tripping, controls this first contactor closure.
Further, this device also comprises:
Warning circuit is connected with this controller, is used for sending when this first intelligent high-speed switch tripping warning.
Further, this device also comprises:
Capacitance type potential transformer, first end of this capacitance type potential transformer is connected with first end after this first contactor, this first current limiting reactor and the first intelligent high-speed switch in parallel, the output of this capacitance type potential transformer is connected with the power supply circuits of this controller, is used for to this controller power supply.
Further, the output of this capacitance type potential transformer is connected with the power supply circuits of this controller by isolating to become.
Further, this device also comprises:
Second current limiting reactor; The second intelligent high-speed switch, in parallel with this second current limiting reactor; Second contactor is with this second intelligent high-speed switch in parallel; Wherein, the end after this second current limiting reactor, the second intelligent high-speed switch and the second contactor parallel connection is connected with first end of this capacitance type potential transformer; This second intelligent high-speed switch is identical with this first intelligent high-speed on off state, and this second contactor is identical with this first contactor state.
Further, this device also comprises:
Storage battery is connected with the power supply circuits of this controller, and being used for provides stand-by power supply to this controller.
To achieve these goals, according on the other hand of the present utility model, provide a kind of grid current limiting device, this grid current limiting device is composed in series by a plurality of said apparatus.
To achieve these goals, according to another aspect of the present utility model, provide a kind of grid current limiting system, comprised above-mentioned grid current limiting device, also comprised control sub-station, this control sub-station is connected with this grid current limiting device.
Further, this grid current limiting device is a plurality of, these a plurality of grid current limiting device series connection.
The disconnection of the utility model by the first intelligent high-speed switch seals in first current limiting reactor to carry out current limliting in the circuit, after fault is got rid of, connection by the first intelligent high-speed switch is in this first current limiting reactor under the state of short circuit, this grid current limiting device is under the normal harmless running status, the replacing element need not have a power failure, can recover the normal operation of electrical network, therefore improve the reliability of operation of power networks.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structure chart of a kind of energy-saving grid current limiting device of providing according to prior art;
Fig. 2 is the structure chart according to the grid current limiting device of the utility model embodiment one;
Fig. 3 is the structure chart according to the grid current limiting device of the utility model embodiment two;
Fig. 4 is the structure chart according to the grid current limiting device of the utility model embodiment three;
Fig. 5 is the structure chart according to the grid current limiting device of the utility model embodiment four;
The structural representation of a kind of grid current limiting device that Fig. 6 provides for the utility model embodiment;
Fig. 7 is the plan structure figure of grid current limiting device shown in Figure 6;
Fig. 8 is the structure chart according to a kind of grid current limiting device of the utility model embodiment;
Fig. 9 is the structure chart of a kind of grid current limiting system of the utility model embodiment; And
Figure 10 is the structure chart of the another kind of grid current limiting system of the utility model embodiment.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Fig. 2 is the structure chart according to a kind of grid current limiting device of the utility model embodiment, and as shown in Figure 2, the grid current limiting device of this embodiment comprises:
First current limiting reactor 101.
Preferably, this first current limiting reactor is hollow current-limiting reactor.
The first intelligent high-speed switch 102, in parallel with this first current limiting reactor 101.
For example, this current transformer can be the extraordinary CT(Currenttransformer of circuit, current transformer), be the hardware condition of realizing the quick judgement of short circuit current.
For example, this first preset value can be this bus rated current of 7 times, and this second preset value can be this bus rated current of 1.2 times.
Current limitation effect of the present utility model adopts the short circuit operation current limliting to reach, under the situation of operate as normal, this first intelligent high-speed switch is in the state that closes that closes, this first current limiting reactor is in the short circuit state, electric current only flows through this first intelligent high-speed switch, impedance is zero, there is not loss, when being short-circuited fault, this electric current moment change is big, and monitored and be uploaded to controller by this current transformer, after this controller judged that this electric current is greater than first preset value, this controller sent ON-and OFF-command to this first intelligent high-speed switch, and this first intelligent high-speed switch disconnects in 15ms at once, this first current limliting electric controller input current limliting is in service, this short circuit current can be restricted to below 80 percent of this short circuit current; After this short trouble is got rid of, this controller monitors this electric current less than second preset value by this current transformer, this controller sends to this first intelligent high-speed switch and connects order, and behind this first intelligent high-speed switch connection, this grid current limiting device enters normal harmless running status.
The grid current limiting device that the utility model provides, disconnection by the first intelligent high-speed switch seals in first current limiting reactor to carry out current limliting in the circuit, after fault is got rid of, connection by the first intelligent high-speed switch is in this first current limiting reactor under the state of short circuit, this grid current limiting device is under the normal harmless running status, the replacing element that need not have a power failure, therefore the normal operation that can recover electrical network improves the reliability of operation of power networks.
Preferably, Fig. 3 is the structure chart according to a kind of grid current limiting device of the utility model embodiment, and as shown in Figure 3, the grid current limiting device of this embodiment comprises:
First current limiting reactor 101.
The first intelligent high-speed switch 102, in parallel with this first current limiting reactor 101.
This first contactor can be high-pressure vacuum contactor.
For getting rid of the operation of circuit band current limiting reactor and the device interruption maintenance problem that this first intelligent high-speed switch tripping causes, can be at the two ends of this first intelligent high-speed switch first contactor in parallel, guarantee to adapt to the requirement of power system operating mode, when this controller detects this first intelligent high-speed switch tripping, controller sends a signal to this first contactor and makes its combined floodgate, with this grid current limiting device state out of service.
Warning circuit 106 is connected with this controller 104, is used for sending when these first intelligent high-speed switch, 102 trippings warning.
The grid current limiting device that the utility model embodiment provides, close a floodgate when this first intelligent high-speed switch breaks down by first contactor, make this grid current limiting device state out of service, owing to got rid of the influence of this grid current limiting device faults itself to this electrical network, therefore further improved the reliability of operation of power networks.
Preferably, Fig. 4 is the structure chart according to a kind of grid current limiting device of the utility model embodiment, and as shown in Figure 4, the grid current limiting device of this embodiment comprises:
First current limiting reactor 101.
The first intelligent high-speed switch 102, in parallel with this first current limiting reactor 101.
Capacitance type potential transformer 107, first end of this capacitance type potential transformer 107 is connected with first end after this first contactor 105, this first current limiting reactor 101 and 102 parallel connections of the first intelligent high-speed switch, the output of this capacitance type potential transformer 107 is connected with the power supply circuits of this controller 104, is used for to 104 power supplies of this controller.
Preferably, the output of this capacitance type potential transformer 107 is connected with the power supply circuits of this controller 104 by isolating to become.
This capacitance type potential transformer comprises dividing potential drop electric capacity and high pressure coupling capacitance, and wherein, this isolates change from this dividing potential drop electric capacity two ends power taking, is delivered to controller, and controller judges that normal charged back starts control program.
Preferably, Fig. 5 is the structure chart according to a kind of grid current limiting device of the utility model embodiment, and as shown in Figure 5, the grid current limiting device of this embodiment comprises:
First current limiting reactor 101.
The first intelligent high-speed switch 102, in parallel with this first current limiting reactor 101.
Capacitance type potential transformer 107, first end of this capacitance type potential transformer 107 is connected with first end after this first contactor 105, this first current limiting reactor 101 and 102 parallel connections of the first intelligent high-speed switch, the output of this capacitance type potential transformer 107 is connected with the power supply circuits of this controller 104, is used for to 104 power supplies of this controller.
Second current limiting reactor 201.
The second intelligent high-speed switch 202, in parallel with this second current limiting reactor 201.
Wherein, the end after this second current limiting reactor 201, the second intelligent high- speed switch 202 and 205 parallel connections of second contactor is connected with first end of this capacitance type potential transformer 107; This second intelligent high-speed switch 202 is identical with these first intelligent high-speed switch, 102 states, and this second contactor 205 is identical with these first contactor, 105 states.
Preferably, this device also comprises:
Storage battery is connected with the power supply circuits of this controller, and being used for provides stand-by power supply to this controller.
Referring to Fig. 6; the structural representation of a kind of grid current limiting device that Fig. 6 provides for the utility model; wherein; first current limiting reactor 101 and second current limiting reactor 201 are supported by post insulator 112; preferably; this first current limiting reactor 101 and second current limiting reactor 201 can be hollow current-limiting reactor; the first intelligent high-speed switch 102; the second intelligent high-speed switch 202 and current transformer 103 are arranged in the Current limited Control casing 115; also be provided with device 116 in this Current limited Control casing; be provided with first contactor 105 in this device 116; second contactor 205 and controller 104; this Current limited Control casing 115 is supported by capacitance type potential transformer 107 and optical fiber insulator 113; the high-pressure side of this grid current limiting device is to be connected and fixed firmly; its low-pressure side can be by steelframe with pillar insulation 112; capacitance type potential transformer 107 and optical fiber insulator 113 are fixed in one plane; on the high voltage platform of device; connected by insulation magnetic pillar 111 between first current limiting reactor 101 and second current limiting reactor 201; guarantee coefficient of mutual inductance≤3%; this first current limiting reactor 101 is in parallel with the first intelligent high-speed switch 102 and first contactor 105; this this second current limiting reactor 201 is in parallel with the second intelligent high-speed switch 202 and second contactor 205; in addition; the power supply of this controller 104 is provided by inverted capacitance type potential transformer 107, and the communication of controller 104 and control sub-station is realized by the optical fiber in the optical fiber insulator 113.
Referring to Fig. 7, Fig. 7 is the plan structure figure of grid current limiting device shown in Figure 6, and wherein, 101 is first current limiting reactor, and this first current limiting reactor 101 can be columniform hollow current-limiting reactor; 115 is the Current limited Control casing, and this first current limiting reactor is connected with this Current limited Control casing.
The grid current limiting device that the utility model embodiment provides carries out current limliting by adopting two current limiting reactors when electrical network is short-circuited fault, improved the current limiting performance of grid current limiting device, has therefore further improved the reliability of operation of power networks.
Fig. 8 is the structure chart according to a kind of grid current limiting device of the utility model embodiment, and this grid current limiting device is composed in series by a plurality of above-mentioned grid current limiting devices.
The grid current limiting device that the utility model embodiment provides can be according to the needs of current limitation effect, can be composed in series by a plurality of grid current limiting devices, as long as grid current limiting device correct operation, just can guarantee follow-up grid current limiting device safe action, along with the action of each grid current limiting device, alleviate the amplitude of short circuit that follow-up grid current limiting device cut-offs accordingly.For example, can adopt 4 grid current limiting device series connection to form a grid current limiting device.
The grid current limiting device that the utility model provides, constituted by a plurality of above-mentioned grid current limiting device series connection, after short trouble is got rid of, the replacing element that need not have a power failure, the normal operation that can recover electrical network has improved the reliability of operation of power networks, in addition, with a plurality of grid current limiting device series connection, can improve the current limiting performance of grid current limiting device further, therefore further improved the reliability of operation of power networks.
Fig. 9 is a kind of grid current limiting system according to the utility model embodiment, it is characterized in that, comprises above-mentioned grid current limiting device 901, also comprises control sub-station 902, and this control sub-station 902 is connected with this grid current limiting device 901.
This control sub-station 902 can receive the supply power voltage of current value, intelligent high-speed on off state and the controller of these grid current limiting device 901 transmissions, and in the panel of this control sub-station, show in real time, in addition, under the situation of intelligent high-speed switch tripping, this control sub-station can also send to report to the police and point out.
Referring to Figure 10, Figure 10 is a kind of grid current limiting system according to the utility model embodiment, wherein, 101 is first current limiting reactor, 201 is second current limiting reactor, 102 is the first intelligent high-speed switch, 202 is the second intelligent high-speed switch, and 105 is first contactor, and 205 is second contactor, 104 is controller, 103 is current transformer, and 107 is capacitance type potential transformer, and this capacitance type potential transformer 107 comprises dividing potential drop capacitor C 1 and high pressure coupling capacitance C2,108 for isolating change, and 902 is control sub-station; This grid current limiting system all is in on-state at the put into operation preceding first intelligent high-speed switch 102, the second intelligent high-speed switch 202, first contactor 105 and second contactor 205, and first current limiting reactor 101 and second current limiting reactor 201 are in the short circuit state.Behind this grid current limiting device hanging net operation, isolate and become the 108 dividing potential drop capacitor C 1 two ends power takings from capacitance type potential transformer 107, flow to controller 104, controller 104 judges that normal charged back starts control program, after the accumulation power supply of first contactor 105 and second contactor 205 is full of electricity, controller 104 sends signal disconnects first contactor 105 and second contactor 205, simultaneously with the first intelligent high-speed switch 102, the second intelligent high-speed switch 202, the state of first contactor 105 and second contactor 205 is sent to the control sub-station 902 of far-end, be in the first intelligent high-speed switch 102 this moment, the second intelligent high-speed switch 202 and first current limiting reactor 101, the normal operating condition of second current limiting reactor, 201 parallel runnings, because the first intelligent high-speed switch 102, the impedance of the second intelligent high-speed switch 202 is zero, the line current circulation does not produce loss, first current limiting reactor 101, second current limiting reactor 201 is respectively by the first intelligent high-speed switch 102, the second intelligent high-speed switch, 202 short circuits do not produce loss yet, and device is in harmless running status.By current transformer 103, controller 104 is monitored the line current in the bus in real time, when being short-circuited fault, controller 104 judges that short circuit current reaches first preset value, control the first intelligent high-speed switch 102, the second intelligent high-speed switch 202 separating brake in 15ms, make first current limiting reactor 101, second current limiting reactor 201 seals in the 330kV transmission line, restriction grid short circuit electric current, controller 104 is with this short circuit current numerical value (waveform of overall process) and the first intelligent high-speed switch 102 simultaneously, the state of the second intelligent high-speed switch 202 is sent to the control sub-station 902 of far-end by optical fiber, after monitoring the eliminating of line short circuit current fault, judge that whether electric current is less than second preset value, if electric current is less than second preset value, controller 104 sends signal and makes the first intelligent high-speed switch 102, the second intelligent high-speed switch 202 is connected, this grid current limiting device enters normal harmless running status, the while first intelligent high-speed switch 102, the state of the second intelligent high-speed switch 202 is sent to the control sub-station 902 of far-end by optical fiber, if switch combined floodgate tripping, controller 104 sends signal and makes its connection for first contactor 105 and second contactor 205, with this grid current limiting device state out of service, do not influence the normal operation of circuit this moment, but the metering function of device disappears simultaneously, guaranteeing under the good situation of contactor combined floodgate, can pass through 902 pairs of first intelligent high-speed switches 102 of control sub-station, the operations such as adjustment that reset of the second intelligent high-speed switch 202 are repaired in the time of then need waiting for line maintenance as not resetting.
Preferably, this grid current limiting device is a plurality of, these a plurality of grid current limiting device series connection.
In the utility model embodiment, the restriction of 500kV and following grid short circuit electric current is adopted the design of current limliting unit, can have been carried out a plurality of series connection as playing with building blocks, realized the various degree of depth requirements of current limliting.Thereby the utility model embodiment has limited 330(500 cost-effectively) kV and following grid short circuit levels of current.
Intelligent high-speed switch among the utility model embodiment (perhaps, being called the intelligent high-speed large-capacity vacuum circuit breaker) can be judged short circuit current zero crossing and the large-capacity vacuum circuit breaker that cut-offs at current zero-crossing point automatically for a kind of.Switch off time is less than 15ms.
Fast identification and phase control method judge fast whether short circuit current transfinites and control the intelligent high-speed switch and cut-off at every phase current zero crossing to the utility model embodiment by short circuit current.
The grid current limiting system that the utility model provides, disconnection by the intelligent high-speed switch seals in current limiting reactor to carry out current limliting in the circuit, after fault is got rid of, connection by the intelligent high-speed switch is in current limiting reactor under the state of short circuit, this grid current limiting device is under the normal harmless running status, the replacing element that need not have a power failure, therefore the normal operation that can recover electrical network improves the reliability of operation of power networks.
By the utility model embodiment, improved the reliability of operation of power networks, the use of also can connecting of the grid current limiting device of the utility model embodiment limits 330(500 cost-effectively) kV and following grid short circuit levels of current.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. a grid current limiting device is characterized in that, comprising:
First current limiting reactor;
The first intelligent high-speed switch, in parallel with described first current limiting reactor;
Current transformer is sleeved on the bus of the side after described first current limiting reactor and the described first intelligent high-speed switch in parallel, is used for the electric current of the described bus of monitoring in real time; And
Controller, be connected with described current transformer, be used for controlling described first intelligent high-speed switch disconnection during greater than first preset value when described electric current, and control the described first intelligent high-speed switch closure when described electric current during less than described second preset value, described first preset value is greater than described second preset value.
2. device according to claim 1 is characterized in that, described device also comprises:
First contactor is with the described first intelligent high-speed switch in parallel;
Described controller is also for detection of the state of the described first intelligent high-speed switch, and when the described first intelligent high-speed switch tripping, controls the described first contactor closure.
3. device according to claim 2 is characterized in that, described device also comprises:
Warning circuit is connected with described controller, is used for sending when the described first intelligent high-speed switch tripping warning.
4. device according to claim 2 is characterized in that, described device also comprises:
Capacitance type potential transformer, first end of described capacitance type potential transformer is connected with first end after described first contactor, described first current limiting reactor and the first intelligent high-speed switch in parallel, the output of described capacitance type potential transformer is connected with the power supply circuits of described controller, is used for to described controller power supply.
5. device according to claim 4 is characterized in that, the output of described capacitance type potential transformer is connected with the power supply circuits of described controller by isolating to become.
6. device according to claim 4 is characterized in that, described device also comprises:
Second current limiting reactor;
The second intelligent high-speed switch, in parallel with described second current limiting reactor;
Second contactor is with the described second intelligent high-speed switch in parallel;
Wherein, the end after described second current limiting reactor, the second intelligent high-speed switch and the second contactor parallel connection is connected with first end of described capacitance type potential transformer; The described second intelligent high-speed switch is identical with the described first intelligent high-speed on off state, and described second contactor is identical with the described first contactor state.
7. device according to claim 1 is characterized in that, described device also comprises:
Storage battery is connected with the power supply circuits of described controller, and being used for provides stand-by power supply to described controller.
8. a grid current limiting device is characterized in that, described grid current limiting device is composed in series by any described device in a plurality of claims 1 to 7.
9. a grid current limiting system is characterized in that, comprises each described grid current limiting device in the claim 1 to 7, also comprises control sub-station, and described control sub-station is used for by the optical fiber of optical fiber insulator described grid current limiting device being controlled.
10. system according to claim 9 is characterized in that, described grid current limiting device is a plurality of, described a plurality of grid current limiting device series connection.
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| CN 201320010450 CN203056563U (en) | 2013-01-09 | 2013-01-09 | Electric network current limiting device, electric network current limiter and electric network current limiting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023000A (en) * | 2013-01-09 | 2013-04-03 | 宁夏电力公司电力科学研究院 | Power grid current limiting device, power grid current limiter and power grid current limiting system |
| WO2014107854A1 (en) * | 2013-01-09 | 2014-07-17 | 宁夏电力公司电力科学研究院 | Power grid current-limiting apparatus, power grid current limiter, and power grid current-limiting system |
| CN105470929A (en) * | 2015-12-16 | 2016-04-06 | 安徽合凯电气科技股份有限公司 | Discrete lossless deep current-limiting device |
-
2013
- 2013-01-09 CN CN 201320010450 patent/CN203056563U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023000A (en) * | 2013-01-09 | 2013-04-03 | 宁夏电力公司电力科学研究院 | Power grid current limiting device, power grid current limiter and power grid current limiting system |
| WO2014107854A1 (en) * | 2013-01-09 | 2014-07-17 | 宁夏电力公司电力科学研究院 | Power grid current-limiting apparatus, power grid current limiter, and power grid current-limiting system |
| CN103023000B (en) * | 2013-01-09 | 2015-09-16 | 宁夏电力公司电力科学研究院 | Grid current limiting device and grid current limiting device and grid current limiting system |
| US9640984B2 (en) | 2013-01-09 | 2017-05-02 | State Grid Ningxia Electric Power Technical Research Institute | Current limiting device, current limiter and current limiting system for power grid |
| CN105470929A (en) * | 2015-12-16 | 2016-04-06 | 安徽合凯电气科技股份有限公司 | Discrete lossless deep current-limiting device |
| CN105470929B (en) * | 2015-12-16 | 2018-08-28 | 安徽合凯电气科技股份有限公司 | A kind of lossless depth current-limiting apparatus of discrete |
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