CN202444267U - Long distance power distribution network voltage lifting compensating device - Google Patents
Long distance power distribution network voltage lifting compensating device Download PDFInfo
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- CN202444267U CN202444267U CN2011202702053U CN201120270205U CN202444267U CN 202444267 U CN202444267 U CN 202444267U CN 2011202702053 U CN2011202702053 U CN 2011202702053U CN 201120270205 U CN201120270205 U CN 201120270205U CN 202444267 U CN202444267 U CN 202444267U
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Abstract
The utility model specifically relates to a long distance power distribution network voltage lifting compensating device, and belongs to the power electronic technology field. The long distance power distribution network voltage lifting compensating device is characterized in that a primary side of a three-phase access transformer (T) is connected in series with a power distribution network, a secondary side is connected with a three-phase compensating capacitor bank (C1); a three-phase reactor (L) is connected in series with thyristors (SCR) which are connected positively and negatively, and then is connected in parallel with the capacitor bank (C1); a controller (PLC) is connected with the thyristors (SCR), voltage sensors, and a current sensor via sensors and a triggering system. Through adopting the series capacitor compensation method, the defects of a conventional parallel compensating voltage regulating device are overcome, and a device which can completely compensate the inductive drop is provided.
Description
Technical field:
The utility model belongs to electric and electronic technical field, is specifically related to a kind of length and promotes compensation arrangement apart from power distribution network voltage.
Technical background:
Rural power grids have region dispersion, supply line head's characteristics, thus the situation that voltage is low when often there is peak of power consumption in electric terminal, fluctuation is big, and have a series of problems such as some power consumption equipment cisco unity malfunctions, failure rate height.Method with the shunt capacitor compensation comes booster tension to have the little problem of range of regulation again.
The utility model content
The utility model is to overcome deficiency existing and that mend regulator, and a kind of power electronic equipment that can regulate line voltage distribution on a large scale is provided, and is equivalent to shorten line length, can promote user's voltage effectively; And limit resonance and short circuit effectively, and preventing the fault extension, this has important effect to the reliability that improves the rural power grids power supply.
The technical scheme of the utility model is: comprise that three-phase inserts transformer T, three-phase series compensation capacitor group C1, three-phase reactor L, just antiparallel thyristor SCR or all-controlling power electronics device, controller (PLC or other intelligent controller) and triggering system; The former limit that it is characterized in that three-phase access transformer T seals in power distribution network, pays edge joint three-phase compensation capacitor group C1, is used for the voltage landing that the compensated line inductance causes; Three-phase reactor L connects parallelly connected with capacitor group C1 again behind the thyristor SCR of positive and negative connection; Controller PLC and triggering system link to each other with thyristor SCR, voltage sensor PT1, PT2, current sensor CT; Controller and triggering system are carried out phase control to thyristor SCR, thereby the change of the size of scalable reactance device L inductance seals in the size of capacitance in the circuit, and can suppress circuit resonance and short circuit, prevent the fault extension.
Three-phase inserts and to be connected to isolating switch K1 and K2, shorting switch QF before and after the former limit of transformer T, is used for the access of control compensation device and withdraws from.
Capacitor group C1 and thyristor SCR two ends are connected to overvoltage protector RV, lightning arrester FD1, FD2 and capacitance-resistance overvoltage protector RC respectively.
Thyristor SCR also can be replaced by all-controlling power electronics device, and control corresponding is pulse-width modulation (PWM) control.
Controller (PLC or other intelligent controller) and triggering system and voltage sensor and/or current sensor constitute closed-loop control system, and its Control Software combines concrete condition to select.
After selecting suitable withstand voltage device for use and taking quarantine measures, can save three-phase and insert transformer T.
The advantage of the utility model is:
(1), compensating inductance pressure drop entirely.
(2), dynamic real-time compensates entirely, in time follows the tracks of the variation of circuit situation.
(3), simple in structure, reliability is high, the life-span is long, control is flexible.
Description of drawings:
Fig. 1 is the typical single line instance graph of the utility model
Fig. 2 saves the typical single line instance graph that inserts transformer
Embodiment:
In the instance of Fig. 1, T is for inserting transformer, and its effect is an isolated high-voltage.C1 is a series compensation capacitor, and the size of its capacity and circuit emotional resistance adapt.L is a reactor, and SCR is just antiparallel thyristor, and the two serial connection back and capacitor C1 also connect; PLC is controller and triggering system, and the angle of flow that controller is regulated thyristor is the reactance value of scalable reactor L, thereby regulates the building-out capacitor amount of connecting system, makes load voltage best.When transmission line because of big load insert or withdraw from, when thunder and lightning effect equal excitation influence, thereby the size of controller PLC adjustable sensibility reciprocal changes the size that seals in capacitance in the circuit, with the generation of inhibition circuit resonance and short trouble.
Isolating switch K1 and K2, shorting switch QF are used for the access of control compensation device and withdraw from, and behind close K1 and K2, break off QF during access; Behind the QF that closes, break off K1 and K2 when withdrawing from.
Controller PLC and triggering system and voltage sensor, current sensor constitute closed-loop control system, and its Control Software combines concrete condition to select.
Overvoltage protector RV, lightning arrester FD1, FD2 and resistance capaciting absorpting circuit RC are used for the protective circuit device.
The instance of Fig. 2 saves the situation that three-phase inserts transformer T for after selecting suitable withstand voltage device for use and taking quarantine measures, and the effect of each components and parts is with the above.
The just several kinds of embodiments of this utility model of foregoing description; The various fleshes and bloods that illustrate not this utility model constitute restriction; The those of ordinary skill of affiliated technical field is being read modification or the distortion of behind the specification aforesaid embodiment being made, and does not deviate from the essence and the scope of this utility model.
Claims (3)
1. one kind long promotes compensation arrangement apart from power distribution network voltage, belongs to electric and electronic technical field, it is characterized in that the former limit that three-phase inserts transformer (T) seals in power distribution network, pays edge joint three-phase compensation capacitor group (C1); Parallelly connected with capacitor group (C1) again behind the thyristor (SCR) of the positive and negative connection of three-phase reactor (L) series connection; Controller (PLC) and triggering system link to each other with thyristor (SCR), voltage sensor (PT1, PT2), current sensor (CT).
2. a kind of length according to claim 1 promotes compensation arrangement apart from power distribution network voltage, it is characterized in that three-phase insert be connected to before and after the former limit of transformer (T) isolating switch (K1) and (K2), shorting switch (QF).
3. a kind of length according to claim 1 promotes compensation arrangement apart from power distribution network voltage, it is characterized in that capacitor group (C1) and thyristor (SCR) two ends are connected to overvoltage protector (RV), lightning arrester (FD1, FD2) and capacitance-resistance overvoltage protector (RC) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202702053U CN202444267U (en) | 2011-07-28 | 2011-07-28 | Long distance power distribution network voltage lifting compensating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202702053U CN202444267U (en) | 2011-07-28 | 2011-07-28 | Long distance power distribution network voltage lifting compensating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202444267U true CN202444267U (en) | 2012-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202702053U Expired - Lifetime CN202444267U (en) | 2011-07-28 | 2011-07-28 | Long distance power distribution network voltage lifting compensating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202444267U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683294A (en) * | 2012-09-21 | 2014-03-26 | 哈尔滨帕特尔科技股份有限公司 | Adjustable reactor type voltage regulating and stabilizing device |
-
2011
- 2011-07-28 CN CN2011202702053U patent/CN202444267U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683294A (en) * | 2012-09-21 | 2014-03-26 | 哈尔滨帕特尔科技股份有限公司 | Adjustable reactor type voltage regulating and stabilizing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120919 |