CN202772666U - Electric energy extracting device applying to network distribution - Google Patents
Electric energy extracting device applying to network distribution Download PDFInfo
- Publication number
- CN202772666U CN202772666U CN 201220150151 CN201220150151U CN202772666U CN 202772666 U CN202772666 U CN 202772666U CN 201220150151 CN201220150151 CN 201220150151 CN 201220150151 U CN201220150151 U CN 201220150151U CN 202772666 U CN202772666 U CN 202772666U
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- voltage
- capacitor
- electric energy
- low pressure
- saturable reactor
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- 239000003990 capacitor Substances 0.000 claims abstract description 36
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910000889 permalloy Inorganic materials 0.000 claims abstract description 4
- 230000007935 neutral effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000011162 core material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to an electric energy extracting device applying to network distribution. The electric energy extracting device applying to network distribution includes a capacitor, a low-voltage saturation resistor connected with the capacitor in series and discharging gaps connected to two ends of the low-voltage saturation resistor in parallel. The electric energy extracting device applying to network distribution is characterized in that the capacitor is a high-voltage capacitor whose working voltage across two ends accounts for more than 95 percents of input power grid voltage; an iron core of the low-voltage saturation resistor is made of ultracrystalline material or permalloy material; and the rated capacity of the electric energy extracting device applying to network distribution is equal to or less than 1270 VA.
Description
Technical field
The utility model relates to a kind of electric energy draw-out device that is applied to distribution, is specially abstracting method and device for all kinds of distribution transformer station electrical secondary system power supply of 35kV and following electric pressure, belongs to control and the resist technology field of transformer station in the electric power system.
Background technology
In the electric power system; the secondary device of electrical network; such as electric power meter, protective relaying device, failure recovery device, communication device, automatic control equipment etc.; all need reliable and stable working power power supply, prior art comprises that mainly the voltage transformer power supply reaches independently secondary power supply system power supply two large classes.For power distribution network, after transformer station, box-type substation, switch cubicle, ring main unit etc. self and electrical network disconnection, (also do not claim direct current cabinet, battery pack if do not dispose the power supply that is consisted of by energy storage battery and inverter, power cabinet etc.), just can't carry out with outside electric power network the operation of catering to of switch.Therefore occurred in the point of incoming cables of transformer station or switch cubicle electrical network electric energy draw-out device being installed, taken out the energy device such as electromagnetic potential transformer, this voltage transformer is installed in the so-called station usually, then can't use when station equipment and inlet wire disconnection.If be installed in outside the station, inlet wire overvoltage risk can appear again tolerating; And when electromagnetic potential transformer need satisfy error characteristics and the requirement of tolerance power network overvoltage simultaneously, its volume can increase, weight can strengthen, cost rises rapidly.If adopt independently secondary power supply system power supply scheme, also existing needs separately configuration power supply panel, and it is many to take the interval, invests the problems such as large.Chinese utility model patent " overhead transmission line is got the energy power supply " (application number: 201020254057.1) reach " cable plugging type energy taking power supply " (application number: 201020205090.5) disclosed; transformer with get can capacitor connecting device; the latter linked of electric capacity is transformer primary side and protection module; transformer secondary side joint AC/DC power module; its weak point is: when the transformer primary voltage changes; its secondary output can be along with variation; transformer self is resisted the surge voltage ability, and the secondary output stability is relatively poor.
Summary of the invention
The purpose of this utility model is the problem that proposes for background technology, a kind of electric energy abstracting method and device that is applied to distribution disclosed, comprise high-voltage capacitor and low pressure saturable reactor series circuit, alternative independently DC power supply panel and voltage transformer are to electric grid secondary system supply power, described device is installed in the end of incoming cables that the equipment such as transformer station, switch cubicle, ring main unit link to each other, can expand the operational mode of electrical network, strengthen the manipulation function of electrical network, improve the reliability of operation of power networks, reduce the electrical network cost.
The technical solution of the utility model is: a kind of electric energy draw-out device that is applied to distribution, comprise capacitor, with the low pressure saturable reactor of described capacitor's seriesu, be connected in parallel in addition the discharging gap at low pressure saturable reactor two ends; It is characterized in that: described capacitor is that the two ends operating voltage accounts for the high-voltage capacitor of access line voltage more than 95%, and low pressure saturable reactor iron core is ultracrystallite material or permalloy material; Rated capacity≤the 1270VA of described electric energy draw-out device.Its beneficial effect is: be output as power supply with the interchange that is operated in reactor under the saturated situation, for all need the power devices of power supply in the transformer station, and when primary voltage changed even surge voltage occurs, reactor still was operated in saturation condition, had reached stable output effect; When overvoltage occurring in the high-voltage capacitance work, discharging gap is at first breakdown because of overvoltage, and a large amount of electric currents is leaked into the earth, and the overvoltage of low pressure saturable reactor tolerance was significantly descended, and plays the effect of protection low pressure saturable reactor.
The course of work of the present utility model is: adopt high-voltage capacitor connect with the low tension reactor that is operated in saturated situation, by the reactor of under saturation condition, working all the time power devices method in the transformer station, the acting on more than 95% on the high-voltage capacitor of primary voltage; Can adopt a loop (the single-phase energy of taking out) mode extracting energy; For the neutral-point solid ground network system, adopt single loop mode extracting energy, the capacitor high-pressure side in the loop connects with high-tension line, output low-tension supply after reactor one end is connected with the capacitor low-pressure end, reactor other end ground connection, discharging gap is connected in parallel on the reactor two ends; For the neutral nondirect earthing network system, adopt double loop extracting energy, double loop output low-tension supply mode (two-phase is taken out energy), the not homophase that the capacitor high-pressure side in each loop gets access to grid, output low-tension supply after reactor one end is connected with the capacitor low-pressure end, reactor other end ground connection, discharging gap is connected in parallel on the reactor two ends.Most of neutral nondirect earthing network system to China when adopting double loop mode extracting energy, if electric network single-phase earth fault occurs, has a normal extracting energy in loop at least and exports electric energy.Reactor is operated in the saturation interval, is in saturation condition in the work, and the operation voltage of described discharging gap is chosen by two times of electrical secondary system rated operational voltage.
Operation principle of the present utility model is (with reference to accompanying drawing 1): leading 90 ° according to the voltage ratio electric current of inductance, leading 90 ° of the current ratio voltage of electric capacity, when primary voltage U acts on this electric energy draw-out device, 180 ° of voltage phase difference on high-voltage capacitor C and the low pressure saturable reactor L are in saturation condition and its both end voltage U during low pressure saturable reactor L work
LLower, primary voltage U
1Main Function on high-voltage capacitor C, i.e. voltage U on the capacitor C
C＞＞U
LSo, U
C≈ U
1
This electric energy draw-out device for distribution utilizes the magnetic saturation characteristic of low pressure saturable reactor L, at primary voltage under the condition of certain limit fluctuation, low pressure saturable reactor L two ends output voltage U
2All the time be in metastable state, the parameter of stability and high-voltage capacitor C is relevant with the magnetization curve characteristic of low pressure saturable reactor L.High-voltage capacitor C capacitance is larger, and the magnetization curve gradient of low pressure saturable reactor L is more slow, the voltage U of secondary output
2Stability is higher.
Description of drawings
Accompanying drawing 1 is electric energy draw-out device basic circuit diagram in the solidly earthed neutral system;
Accompanying drawing 2 is electric energy draw-out device basic circuit diagram in the neutral point non-direct grounding system;
Accompanying drawing 3 is single-circuit electric energy draw-out device structural representation.
Embodiment
Mark in the accompanying drawing is in the accompanying drawing 1: C-high-voltage capacitor; L-low pressure saturable reactor; G-discharging gap; U
1-primary voltage U
1U
2-secondary output voltage; In the accompanying drawing 2: C
1, C
2-A phase, B phase high-voltage capacitor; L
1, L
2-A phase, B phase low pressure saturable reactor; g
1, g
2-A phase, B phase discharge gap; U
A, U
B-A phase, B phase primary voltage; U
21, U
22-A phase, B phase secondary output voltage; In the accompanying drawing 3: 1-HV Terminal; 2-Voltage-output terminal; 3-grounded neutral; 4-high-voltage capacitance; 5-shell; 6-discharging gap; 7-low pressure saturable reactor; 8-nylon cushion block.
Below in conjunction with accompanying drawing inventive embodiments is described further:
As shown in Figure 1, the utility model is applied to electric energy abstracting method and the device of distribution, comprises high-voltage capacitor C, the low pressure saturable reactor L that connects with capacitor C and the discharging gap g that is connected in parallel on low pressure saturable reactor L two ends; The iron core of low pressure saturable reactor L is ultracrystallite material or permalloy material; The number of turn of capacitor C capacity and reactor L according to line voltage grade, electrical secondary system power supply capacity is required and the mode of connection of electrical network is determined, the operation voltage of discharging gap g is chosen by two times of electrical secondary system rated operational voltage.In the work; primary voltage acts on the high-voltage capacitor more than 95%; all the time under saturation condition, work with the low pressure saturable reactor of capacitor's seriesu; even the appearance of overvoltage surge is arranged on circuit like this; also can be absorbed at the low pressure saturable reactor; guaranteed the steady of low pressure saturable reactor two ends output voltages, the discharging gap that is connected in parallel on low pressure saturable reactor two ends is when occurring in the superpotential situation, for the protection of the low pressure saturable reactor on the high-voltage capacitor.
[0011]Embodiment one:
Be the electric energy draw-out device for the neutral-point solid ground of 10KV network system as shown in Figure 1, the rated operational voltage of setting electrical secondary system is 200V ± 20V, rated output capacity S
nBe 1270VA, calculating and design data are as follows:
The output of electric energy draw-out device need to reach 1270VA, and the output current that calculates by 200V is 6.35A, and the effective voltage value of 10kV electrical network is
, with the numerical value substitution according to formula
The capacitance that calculates high-voltage capacitor should greater than 3.51uF, provide certain saturated nargin C value and get 3.53 μ F.If select silicon steel sheet as low pressure saturable reactor L core material, close 1.7 teslas that are decided to be of nominal operation magnetic, the area of core section of L is designed to 6cm
2, diameter of wire is got 1.8mm, current in wire density 2.5A, and the voltage on the L is 200V, k gets 0.9, according to formula
Calculate, obtain N and be about 982 circles.When output voltage calculated according to 240V, the capacitance of the high-voltage capacitor that obtains should be greater than 3.51uF, and this moment, the turns calculations of low pressure saturable reactor L was about 1179 circles.The scope of comprehensive output voltage as can be known, under this condition, the electric capacity of high-voltage capacitor is measured 3.53 μ F, the number of turn of low pressure saturable reactor L is got 1180 circles.
Put the operation voltage of gap g, export the corresponding apparatus insulated level of electrical secondary system as foundation take secondary, can get by 2 times electrical secondary system rated operational voltage, for example the electrical secondary system rated voltage is 220V in this example, puts so the operation voltage of gap g and can get 440V.In addition, if strengthen area of core section, diameter of wire is increased, can improve the stability of secondary output voltage.
[0013]Embodiment two:
As shown in Figure 2, for the electric energy draw-out device of the neutral point indirect earthing of 10KV network system, independently take out can device in the double loop to adopt two, and the rated operational voltage of setting electrical secondary system is 220V ± 20V, rated output capacity S
nDuring for 1270VA, each is taken out the parameter of energy device and chooses according to the computing formula of example one.In the work, when electrical network generation single phase ground fault, system becomes the situation of neutral-point solid ground, and the state of Fig. 2 becomes the state of Fig. 1 at this moment.When single phase ground fault does not occur electrical network, take out the state that can principle presents Fig. 2, under this state behind A or B generation single-phase earthing, the similar electric network single-phase earth fault that occurred, Fig. 2 becomes again the operating state that is similar to Fig. 1.
In the accompanying drawing 2, U
21And U
22Work alone, can get simultaneously energy, also can be only with one, another is as for subsequent use.
Claims (1)
1. electric energy draw-out device that is applied to distribution, comprise capacitor, with the low pressure saturable reactor of described capacitor's seriesu, be connected in parallel in addition the discharging gap at low pressure saturable reactor two ends; It is characterized in that: described capacitor is that the two ends operating voltage accounts for the high-voltage capacitor of access line voltage more than 95%, and low pressure saturable reactor iron core is ultracrystallite material or permalloy material; Rated capacity≤the 1270VA of described electric energy draw-out device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220150151 CN202772666U (en) | 2012-04-11 | 2012-04-11 | Electric energy extracting device applying to network distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220150151 CN202772666U (en) | 2012-04-11 | 2012-04-11 | Electric energy extracting device applying to network distribution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202772666U true CN202772666U (en) | 2013-03-06 |
Family
ID=47779208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220150151 Expired - Fee Related CN202772666U (en) | 2012-04-11 | 2012-04-11 | Electric energy extracting device applying to network distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202772666U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647020A (en) * | 2012-04-11 | 2012-08-22 | 中国电力科学研究院 | Electric power extraction method and device applicable for power network distribution |
-
2012
- 2012-04-11 CN CN 201220150151 patent/CN202772666U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647020A (en) * | 2012-04-11 | 2012-08-22 | 中国电力科学研究院 | Electric power extraction method and device applicable for power network distribution |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20180411 |