CN105375459A - Arc extinction system for power transmission network - Google Patents
Arc extinction system for power transmission network Download PDFInfo
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- CN105375459A CN105375459A CN201510766333.XA CN201510766333A CN105375459A CN 105375459 A CN105375459 A CN 105375459A CN 201510766333 A CN201510766333 A CN 201510766333A CN 105375459 A CN105375459 A CN 105375459A
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Abstract
The invention discloses an arc extinction system for a power transmission network. The arc extinction system comprises a plurality of arc extinction devices, a plurality of circuit breakers, a sensor and a controller, wherein the arc extinction devices are used for providing arc extinction functions; the multiple circuit breakers are connected with the same section of a power transmission line; each circuit breaker is further connected with one arc extinction device; the circuit breakers are used for connecting the arc extinction devices into the power transmission line for performing arc extinction on the power transmission line when the circuit breakers are closed; the sensor is connected with the power transmission line and used for detecting the voltage signal and/or the current signal of the power transmission line; and the controller is connected with the multiple circuit breakers, the multiple arc extinction devices and the sensor separately, used for controlling the multiple circuit breakers according to the voltage signal and/or the current signal, and also used for adjusting the compensation capacity of the connected arc extinction devices after the circuit breakers are closed. The technical problem of relatively high cost in improvement of ground compensation devices for the power grid in the correlation technique is solved by the arc extinction system for the power transmission network.
Description
Technical field
The present invention relates to field of power, in particular to a kind of arc-extinguishing system for power transmission network.
Background technology
Along with the development of science and technology, power grid construction scale constantly expands, add the development of grid structure, power system capacity is increasing, system capacitance current is over the ground also increasing, the first arc suppression coil capacity that original system uses can not meet demand, in order to make system safety reliably run, just needs increase-volume to meet the compensation requirement of system.To meet system cloud gray model requirement, then need to transform system, and the difficulty of transformation is comparatively large, needs integral replacing equipment, investment is too large, existing equipment can be caused to scrap, cause great waste.
For the technical problem that cost when transforming the ground compensation equipment of electrical network in correlation technique is higher, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide a kind of arc-extinguishing system for power transmission network, the technical problem that when transforming the ground compensation equipment of electrical network in correlation technique at least to solve, cost is higher.
According to the embodiment of the present invention, provide a kind of arc-extinguishing system for power transmission network, this system comprises: multiple extinguishing arc equipment, and extinguishing arc equipment is used for providing arc eliminator; Multiple circuit breaker, multiple circuit breaker is connected with same section of power transmission line respectively, each circuit breaker also with an extinguishing arc equipment connection, it is power transmission line extinguishing arc by extinguishing arc equipment access power transmission line that circuit breaker is used for when closed; Transducer, is connected with power transmission line, for detecting voltage signal and/or the current signal of power transmission line; And controller, be connected with multiple circuit breaker, multiple extinguishing arc equipment and transducer respectively, for controlling multiple circuit breaker according to voltage signal and/or current signal, also for adjusting the compensation capacity of the extinguishing arc equipment of access after breaker closing.
Further, extinguishing arc equipment comprises: transformer, and the input of transformer is connected with circuit breaker; Isolating switch, the first end of isolating switch is connected with the neutral point of transformer; First crowbar circuit, is connected with the second end of isolating switch; Second crowbar circuit; And loaded switch, the first end of loaded switch is connected with the second end of isolating switch, second end of loaded switch is connected with the second crowbar circuit, and the 3rd end of loaded switch is connected with controller, and loaded switch is used for when receiving the triggering signal of controller closed.
Further, the first crowbar circuit comprises: the first arc suppression coil, and the first end of the first arc suppression coil is connected with the second end of isolating switch, the second end ground connection of the first arc suppression coil.
Further, the second crowbar circuit comprises: the second arc suppression coil, and the first end of the second arc suppression coil is connected with the second end of loaded switch, the second end ground connection of the second arc suppression coil; First fuse, the first end of the first fuse is connected with the first end of the second arc suppression coil; First contactor, the first end of the first contactor is connected with the second end of the first fuse; And first resistance, the first end of the first resistance is connected with the second end of the first contactor, and the second end of the first resistance is connected with the second end of the second arc suppression coil.
Further, the second crowbar circuit also comprises: the second fuse, and the first end of the second fuse is connected with the first end of the second arc suppression coil; Second contactor, the first end of the second contactor is connected with the second end of the second fuse; And second resistance, the first end of the second resistance is connected with the second end of the second contactor, and the second end of the second resistance is connected with the second end of the second arc suppression coil.
Further, extinguishing arc equipment also comprises: excess voltage protection, is connected with the neutral point of transformer; Voltage detecting circuit, is connected with the neutral point of transformer, for detecting the voltage of the neutral point of transformer; And current detection circuit, be connected with the second end of the first arc suppression coil, for detecting the electric current flowing through the first arc suppression coil.
Further, excess voltage protection comprises: overvoltage protection device, and the first end of overvoltage protection device is connected with the neutral point of transformer, the second end ground connection of overvoltage protection device.
Further, voltage detecting circuit comprises: voltage transformer, and the first end of voltage transformer is connected with the neutral point of transformer, the second end ground connection of voltage transformer; And the 3rd fuse, the first end of the 3rd fuse and the three-terminal link of voltage transformer, the second end of the 3rd fuse is connected with the 4th end of voltage transformer and controller respectively.
Further, current detection circuit comprises: current transformer, the first end of current transformer is connected with the second end of the first arc suppression coil, the second end ground connection of current transformer, and the 3rd end of current transformer is connected with the 4th end of current transformer and controller respectively.
Further, controller also determines with the electric current flowing through the first arc suppression coil the compensation capacity that the first arc suppression coil provides for the voltage of the neutral point according to transformer, and generates and sends triggering signal to loaded switch when the compensation capacity that the first arc suppression coil provides reaches preset capacity.
In embodiments of the present invention, adopt the arc-extinguishing system for power transmission network that the application provides, multiple circuit breaker is connected with same section of power transmission line respectively, and voltage signal and/or the current signal of power transmission line is detected by transducer, controller controls multiple circuit breaker according to voltage signal and/or current signal, as close circuit breaker with by extinguishing arc equipment access power transmission line for power transmission line extinguishing arc, and according to the compensation capacity of the extinguishing arc equipment of the demand adjustment access of system after breaker closing, because above-mentioned extinguishing arc equipment is the original used equipment of system, original extinguishing arc equipment access system can be realized the dilatation to original system, therefore, without the need to buying new extinguishing arc equipment, thus solve the technical problem that when transforming the ground compensation equipment of electrical network in correlation technique, cost is higher, achieve the rebuilding at low cost of the ground compensation equipment to electrical network.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the arc-extinguishing system for power transmission network according to the embodiment of the present invention; And
Fig. 2 is the schematic diagram of the extinguishing arc equipment according to the embodiment of the present invention.
Embodiment
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
According to the embodiment of the present invention, provide a kind of embodiment of the arc-extinguishing system for power transmission network, Fig. 1 is the schematic diagram of the arc-extinguishing system for power transmission network according to the embodiment of the present invention, as shown in Figure 1, this system comprises: multiple extinguishing arc equipment 10, multiple circuit breaker 20, transducer 30, controller 40.Wherein, extinguishing arc equipment 10 is for providing arc eliminator; Multiple circuit breaker is connected with same section of power transmission line respectively, each circuit breaker also with an extinguishing arc equipment connection, circuit breaker 20 for being power transmission line extinguishing arc by extinguishing arc equipment access power transmission line when closed; Transducer 30, is connected to power transmission line, for detecting voltage signal and/or the current signal of power transmission line; And controller 40, be connected with multiple circuit breaker, multiple extinguishing arc equipment and transducer respectively, for controlling multiple circuit breaker according to voltage signal and/or current signal, also for adjusting the compensation capacity of the extinguishing arc equipment of access after breaker closing.
In embodiments of the present invention, adopt the arc-extinguishing system for power transmission network that the application provides, multiple circuit breaker is connected with same section of power transmission line respectively, and voltage signal and/or the current signal of power transmission line is detected by transducer, controller controls multiple circuit breaker according to voltage signal and/or current signal, as close circuit breaker with by extinguishing arc equipment access power transmission line for power transmission line extinguishing arc, and according to the compensation capacity of the extinguishing arc equipment of the demand adjustment access of system after breaker closing, because above-mentioned extinguishing arc equipment is the original used equipment of system, original extinguishing arc equipment access system can be realized the dilatation to original system, therefore, without the need to buying new extinguishing arc equipment, thus solve the technical problem that when transforming the ground compensation equipment of electrical network in correlation technique, cost is higher, achieve the rebuilding at low cost of the ground compensation equipment to electrical network.
It should be noted that; extinguishing arc equipment (i.e. ground compensation automatic tuning apparatus or blowout coil set apparatus) is for the capacitance current when earth fault appears in transmission system during bucking-out system single-phase earthing; by the Current Control of earth point within rational scope, thus protection electrical network also eliminates the personal safety accident caused because of ferro resonance fault.But along with the development of electrical network, the compensation capacity of existing equipment can not meet the needs of power network development, when system generation single phase ground fault, ferro resonance fault cannot be eliminated, probably jeopardize personal safety when the regeneration such as phase fault, arc grounding, the rising of ground network voltage occur expand fault.
In order to overcome above-mentioned defect, in the scheme of the application, the automatic tuning controller of two is controlled at upper control two the extinguishing arc equipment of same section of bus (i.e. power transmission line) with one one, reach the object coordinating rational control and compensation, when equipment component or large-area power-cuts maintenance, controller reasonably adjusts the reactance of two extinguishing arc equipment automatically according to the parameter (voltage or electric current as power transmission line) of collection in worksite, if an extinguishing arc equipment can meet the demands, another extinguishing arc equipment just exits automatically; If when the compensation capacity of one of them does not reach system requirements, then automatic by another one extinguishing arc equipment access system, to eliminate the harm caused because place capacity is not enough.
In order to improve the flexibility ratio of adjustment, strengthen scope of compromise, present invention also provides embodiment as shown in Figure 2, as shown in Figure 2, extinguishing arc equipment 10 can comprise: transformer TM, and the input of transformer is connected with circuit breaker 20; Isolating switch QS, the first end of isolating switch is connected with the neutral point N of transformer; First crowbar circuit, is connected with second end of isolating switch QS; Second crowbar circuit; And loaded switch K, the first end of loaded switch is connected with the second end of isolating switch, second end of loaded switch is connected with the second crowbar circuit, and the 3rd end of loaded switch is connected with controller 40, and loaded switch is used for when receiving the triggering signal of controller closed.
Particularly, the first crowbar circuit can comprise: the first arc suppression coil LF1, and the first end of the first arc suppression coil is connected with second end of isolating switch QS, the second end ground connection of the first arc suppression coil.Second crowbar circuit can comprise: the second arc suppression coil LF2, and the first end of the second arc suppression coil is connected with second end of loaded switch K, the second end ground connection of the second arc suppression coil; First fuse FU1, the first end of the first fuse is connected with the first end of the second arc suppression coil LF2; First contactor QC1, the first end of the first contactor is connected with second end of the first fuse FU1; And the first resistance R1, the first end of the first resistance is connected with second end of the first contactor QC1, and the second end of the first resistance is connected with the second end of the second arc suppression coil.
It should be noted that, the 4th end of above-mentioned loaded switch is also connected with the first arc suppression coil, to regulate the gear residing for the arc suppression coil in the first crowbar circuit, thus the compensation capacity regulating it to drop into.
Particularly, controller determines according to the voltage of the neutral point of transformer and the electric current flowing through the first arc suppression coil the compensation capacity that the first arc suppression coil provides, and generates and sends triggering signal to loaded switch when the compensation capacity that the first arc suppression coil provides reaches preset capacity (i.e. rated capacity).As controller compare compensation capacity that extinguishing arc equipment needs provide and extinguishing arc equipment the actual compensation capacity provided, when the first arc suppression coil of extinguishing arc equipment puts into operation completely, if the compensation capacity provided (i.e. rated capacity) still can not meet system requirements, automatically regulate extinguishing arc equipment, the second arc suppression coil of the second crowbar circuit puts into operation by closed loaded switch (sliding into the second end A of isolating switch by plug-in strip).
By above-described embodiment, the adjustable range of the compensation capacity of system can be expanded greatly, overcome in prior art and adjust the impact that stream scope is restricted, lower limit capacity uncomfortable, the reason such as restriction, extreme difference increase of loaded switch gear causes.
In order to control operate power, the increase system damping rate of whole circuit, the second crowbar circuit can also comprise: the second fuse FU2, and the first end of the second fuse is connected with the first end of the second arc suppression coil LF2; Second contactor QC2, the first end of the second contactor is connected with second end of the second fuse FU2; And the second resistance R2, the first end of the second resistance is connected with second end of the second contactor QC2, and the second end of the second resistance is connected with second end of the second arc suppression coil FL2.
Above-mentioned resistance (comprising the first resistance and the second resistance) can be metal film noninductive resistance group, by the configuration node together that resistance connection in series-parallel is connected, thus realizes power control, increases system damping rate.
In order to realize self-checking function and over-voltage protecting function, extinguishing arc equipment can also comprise: excess voltage protection, is connected with the neutral point of transformer; Voltage detecting circuit, is connected with the neutral point of transformer, for detecting the voltage of the neutral point of transformer; And current detection circuit, be connected with the second end of the first arc suppression coil, for detecting the electric current flowing through the first arc suppression coil.
Particularly, excess voltage protection can comprise: overvoltage protection device F, and the first end of overvoltage protection device is connected with the neutral point N of transformer, the second end ground connection of overvoltage protection device.Voltage detecting circuit can comprise: voltage transformer TV, and the first end of voltage transformer is connected with the neutral point N of transformer, the second end ground connection of voltage transformer; And the 3rd fuse FU3, the first end of the 3rd fuse and the three-terminal link of voltage transformer TV, the second end of the 3rd fuse is connected with the 4th end of voltage transformer and controller 40 respectively.Current detection circuit can comprise: current transformer TA, the first end of current transformer is connected with second end of the first arc suppression coil LF1, second end ground connection of current transformer, the 3rd end of current transformer is connected with the 4th end of current transformer and controller respectively.
In normal state, controller realizes the measurement of compensation capacity by voltage detecting circuit and current detection circuit, and controller controls the gear of loaded switch according to the change of compensation capacity, exports the capacity that export with making two groups of arc suppression coil energy reasonable coordinations; When system jam, arc suppression coil can export preregulated capacity, reaches the object of the capacitance current of bucking-out system.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed technology contents, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple unit.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. for an arc-extinguishing system for power transmission network, it is characterized in that, comprising:
Multiple extinguishing arc equipment, described extinguishing arc equipment is used for providing arc eliminator;
Multiple circuit breaker, described multiple circuit breaker is connected with same section of power transmission line respectively, and each described circuit breaker is the described extinguishing arc equipment connection with also, and it is described power transmission line extinguishing arc by power transmission line described in described extinguishing arc equipment access that described circuit breaker is used for when closed;
Transducer, is connected with described power transmission line, for detecting voltage signal and/or the current signal of described power transmission line; And
Controller, be connected with described multiple circuit breaker, described multiple extinguishing arc equipment and described transducer respectively, for controlling described multiple circuit breaker, also for adjusting the compensation capacity of the described extinguishing arc equipment of access after described breaker closing according to described voltage signal and/or described current signal.
2. system according to claim 1, is characterized in that, described extinguishing arc equipment comprises:
Transformer, the input of described transformer is connected with described circuit breaker;
Isolating switch, the first end of described isolating switch is connected with the neutral point of described transformer;
First crowbar circuit, is connected with the second end of described isolating switch;
Second crowbar circuit; And
Loaded switch, the first end of described loaded switch is connected with the second end of described isolating switch, second end of described loaded switch is connected with described second crowbar circuit, 3rd end of described loaded switch is connected with described controller, and described loaded switch is used for when receiving the triggering signal of described controller closed.
3. system according to claim 2, is characterized in that, described first crowbar circuit comprises:
First arc suppression coil, the first end of described first arc suppression coil is connected with the second end of described isolating switch, the second end ground connection of described first arc suppression coil.
4. system according to claim 2, is characterized in that, described second crowbar circuit comprises:
Second arc suppression coil, the first end of described second arc suppression coil is connected with the second end of described loaded switch, the second end ground connection of described second arc suppression coil;
First fuse, the first end of described first fuse is connected with the first end of described second arc suppression coil;
First contactor, the first end of described first contactor is connected with the second end of described first fuse; And
First resistance, the first end of described first resistance is connected with the second end of described first contactor, and the second end of described first resistance is connected with the second end of described second arc suppression coil.
5. system according to claim 4, is characterized in that, described second crowbar circuit also comprises:
Second fuse, the first end of described second fuse is connected with the first end of described second arc suppression coil;
Second contactor, the first end of described second contactor is connected with the second end of described second fuse; And
Second resistance, the first end of described second resistance is connected with the second end of described second contactor, and the second end of described second resistance is connected with the second end of described second arc suppression coil.
6. system according to claim 3, is characterized in that, described extinguishing arc equipment also comprises:
Excess voltage protection, is connected with the neutral point of described transformer;
Voltage detecting circuit, is connected with the neutral point of described transformer, for detecting the voltage of the neutral point of described transformer; And
Current detection circuit, is connected with the second end of described first arc suppression coil, for detecting the electric current flowing through described first arc suppression coil.
7. system according to claim 6, is characterized in that, described excess voltage protection comprises:
Overvoltage protection device, the first end of described overvoltage protection device is connected with the neutral point of described transformer, the second end ground connection of described overvoltage protection device.
8. system according to claim 6, is characterized in that, described voltage detecting circuit comprises:
Voltage transformer, the first end of described voltage transformer is connected with the neutral point of described transformer, the second end ground connection of described voltage transformer; And
3rd fuse, the described first end of the 3rd fuse and the three-terminal link of described voltage transformer, the second end of described 3rd fuse is connected with the 4th end of described voltage transformer and described controller respectively.
9. system according to claim 6, is characterized in that, described current detection circuit comprises:
Current transformer, the first end of described current transformer is connected with the second end of described first arc suppression coil, the second end ground connection of described current transformer, and the 3rd end of described current transformer is connected with the 4th end of described current transformer and described controller respectively.
10. system according to claim 6, it is characterized in that, described controller also determines with the electric current flowing through described first arc suppression coil the compensation capacity that described first arc suppression coil provides for the voltage of the neutral point according to described transformer, and generates and sends described triggering signal when the compensation capacity that described first arc suppression coil provides reaches preset capacity to described loaded switch.
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| CN201510766333.XA CN105375459A (en) | 2015-11-11 | 2015-11-11 | Arc extinction system for power transmission network |
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| CN201510766333.XA CN105375459A (en) | 2015-11-11 | 2015-11-11 | Arc extinction system for power transmission network |
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| CN106099895A (en) * | 2016-07-20 | 2016-11-09 | 国网北京市电力公司 | Arc Suppression Coil Control method, device and arc-extinguishing system |
| CN110048392A (en) * | 2019-03-13 | 2019-07-23 | 国网浙江省电力有限公司电力科学研究院 | A kind of simulation system and method for configuration type power distribution network dynamic model mixing earthing mode |
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| CN110048392A (en) * | 2019-03-13 | 2019-07-23 | 国网浙江省电力有限公司电力科学研究院 | A kind of simulation system and method for configuration type power distribution network dynamic model mixing earthing mode |
| CN110048392B (en) * | 2019-03-13 | 2023-12-26 | 国网浙江省电力有限公司电力科学研究院 | Simulation system and method for movable mould mixed grounding mode of configuration type power distribution network |
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