CN205004752U - Terminal automatic voltage regulation of distribution lines and reactive power compensator - Google Patents
Terminal automatic voltage regulation of distribution lines and reactive power compensator Download PDFInfo
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- CN205004752U CN205004752U CN201520784091.2U CN201520784091U CN205004752U CN 205004752 U CN205004752 U CN 205004752U CN 201520784091 U CN201520784091 U CN 201520784091U CN 205004752 U CN205004752 U CN 205004752U
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- blocking tetrode
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- tetrode thyristor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses a terminal automatic voltage regulation of distribution lines and reactive power compensator, the device include increment transformer, building -out capacitor group, thyristor switch block, signal acquisition element and the control unit, signal acquisition element links to each other with the input and the output of increment transformer, building -out capacitor group connect in parallel in between the output and earth signal of increment transformer, switch in the thyristor switch block links to each other with the coil in the increment transformer, signal acquisition element, building -out capacitor group and signal acquisition element all with the control unit links to each other. The device improves end user's voltage quality to solving terminal voltage depression in the power supply electric wire netting, can extensively be suitable for the voltage regulation measure in the rural power grids system. Its is small, and simple to operate can realize the voltage quality dispersion and administer.
Description
Technical field
The utility model belongs to field of power distribution, relates to a kind of distribution line end automatic voltage regulation and reactive power compensator.
Background technology
The distribution line of rural areas in our country, along with season, change voltage fluctuation are round the clock very large; Particularly at rural area irrigation and drainage, Spring Festival, quality of voltage is difficult to ensure especially, often occurs the phenomenon of low voltage from the circuit away from distribution transformer.Current adjustment voltage method mainly contains two kinds: one regulates main transformer tap; Another kind adjusts voltage by compensating reactive power, and these two kinds of methods all can not realize the end voltage automatic stabilisation of electrical network due to the restriction of respective principle.
Utility model content
The utility model provides a kind of distribution line end automatic voltage regulation and reactive power compensator, and its object is to solve terminal voltage in power supply grid on the low side, fluctuate large problem, by adopting auto-increment voltage stabilizing design, improves the quality of voltage of terminal temperature difference.
A kind of distribution line end automatic voltage regulation and reactive power compensator, comprise increment transformer, building-out capacitor group, thyristor switch group, signal gathering unit and control unit;
Described signal gathering unit is connected with output with the input of increment transformer;
Between the output that described building-out capacitor group is parallel to described increment transformer and common port N;
Switch in described thyristor switch group is connected with each magnet-wire coil tap of increment transformer;
Described signal gathering unit, building-out capacitor group and signal gathering unit are all connected with described control unit.
Described increment transformer comprises elementary magnet exciting coil and secondary increment coil, and described elementary magnet exciting coil at least comprises two taps, and described secondary increment coil at least comprises the coil of three sections of series connection.
Described thyristor switch group at least comprises four reverse-blocking tetrode thyristors, and four reverse-blocking tetrode thyristors are followed successively by the first reverse-blocking tetrode thyristor KK1, the second reverse-blocking tetrode thyristor KK2, the 3rd reverse-blocking tetrode thyristor KK3 and the 5th reverse-blocking tetrode thyristor KK0;
Wherein, the tap of described elementary magnet exciting coil is connected with the input of described secondary increment coil by the 5th reverse-blocking tetrode thyristor KK0;
Each section of coil output of described secondary increment coil is connected to common port N respectively by the first reverse-blocking tetrode thyristor KK1, the second reverse-blocking tetrode thyristor KK2 and the 3rd reverse-blocking tetrode thyristor KK3.
Dropping resistor is provided with between the input of described elementary magnet exciting coil and the 5th reverse-blocking tetrode thyristor KK0.
Described thyristor switch group also comprises the 4th reverse-blocking tetrode thyristor KK4, and described 4th reverse-blocking tetrode thyristor KK4 one end B0 is connected with the input of elementary excitation magnetic coil by a movable end of air switch S1, other end B1 is connected with the input of secondary increment coil;
Another movable end of described air switch S1 is by A.C. contactor ground connection, and the switch S 0 of described A.C. contactor is arranged at the two ends of elementary excitation magnetic coil, and the line bag of described A.C. contactor is controlled by air switch S1.
The protection to thyristor switch is realized by air switch S1.Also comprise the buck changeover module be connected with control unit, described buck changeover module comprises the first switching reverse-blocking tetrode thyristor KKa, second and switches reverse-blocking tetrode thyristor KKb and the 6th reverse-blocking tetrode thyristor KK5;
Between one end B0 that described first switching reverse-blocking tetrode thyristor KKa is arranged at described 4th reverse-blocking tetrode thyristor KK4 and the output of secondary increment coil;
Between the input that described second switching reverse-blocking tetrode thyristor KKb is arranged at described secondary increment coil and common port N;
Between the output that described 6th reverse-blocking tetrode thyristor KK5 is arranged at secondary increment coil and common port N.
By changeover module, reduced pressure operation can be realized.
Described building-out capacitor group at least comprises three capacitive branch in parallel, and each capacitive branch comprises single-pole single-throw switch (SPST), inductance and the electric capacity of connecting successively, and each single-pole single-throw switch (SPST) is controlled by described control unit.
Realize regulated output voltage by changing the voltage at series connection incremental voltage bucking coil two ends between input and output, when automatic voltage regulation switches, can not cause because of switching transient voltage be zero situation, thus the continuity of guarantee output voltage.
Beneficial effect
The utility model provides a kind of distribution line end automatic voltage regulation and reactive power compensator, and this device comprises increment transformer, building-out capacitor group, thyristor switch group, signal gathering unit and control unit; Described signal gathering unit is connected with output with the input of increment transformer; Between the output that described building-out capacitor group is parallel to described increment transformer and earth signal; Switch in described thyristor switch group is connected with the coil in increment transformer; Described signal gathering unit, building-out capacitor group and signal gathering unit are all connected with described control unit.Realize regulated output voltage by changing the voltage at series connection incremental voltage bucking coil two ends between input and output, when automatic voltage regulation switches, can not cause because of switching transient voltage be zero situation, thus the continuity of guarantee output voltage.Compensated the break-make of branch road by control capacitance, realize reactive power compensation.This device is on the low side for terminal voltage in solution power supply grid, improves the quality of voltage of terminal temperature difference, extensively can be useful in the Voltage Cortrol measure of agricultural network.Its volume is little, easy for installation, can realize quality of voltage dispersion and administer.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
A kind of distribution line end automatic voltage regulation and reactive power compensator, as shown in Figure 1, comprise increment transformer, building-out capacitor group, thyristor switch group, signal gathering unit and control unit;
Described signal gathering unit is connected with output with the input of increment transformer;
Between the output that described building-out capacitor group is parallel to described increment transformer and common port N;
Switch in described thyristor switch group is connected with each magnet-wire coil tap of increment transformer;
Described signal gathering unit, building-out capacitor group and signal gathering unit are all connected with described control unit.
Described increment transformer comprises elementary magnet exciting coil and secondary increment coil, and described elementary magnet exciting coil at least comprises two taps, and described secondary increment coil at least comprises the coil of three sections of series connection.
Described thyristor switch group at least comprises four reverse-blocking tetrode thyristors, and four reverse-blocking tetrode thyristors are followed successively by the first reverse-blocking tetrode thyristor KK1, the second reverse-blocking tetrode thyristor KK2, the 3rd reverse-blocking tetrode thyristor KK3 and the 5th reverse-blocking tetrode thyristor KK0;
Wherein, the tap of described elementary magnet exciting coil is connected with the input of described secondary increment coil by the 5th reverse-blocking tetrode thyristor KK0;
Each section of coil output of described secondary increment coil is connected to common port N respectively by the first reverse-blocking tetrode thyristor KK1, the second reverse-blocking tetrode thyristor KK2 and the 3rd reverse-blocking tetrode thyristor KK3.
Dropping resistor is provided with between the input of described elementary magnet exciting coil and the 5th reverse-blocking tetrode thyristor KK0.
Described thyristor switch group also comprises the 4th reverse-blocking tetrode thyristor KK4, and described 4th reverse-blocking tetrode thyristor KK4 one end B0 is connected with the input of elementary excitation magnetic coil by a movable end of air switch S1, other end B1 is connected with the input of secondary increment coil;
Another movable end of described air switch S1 is by A.C. contactor ground connection, and the switch S 0 of described A.C. contactor is arranged at the two ends of elementary excitation magnetic coil, and the line bag of described A.C. contactor is controlled by air switch S1.
Also comprise the buck changeover module be connected with control unit, described buck changeover module comprises the first switching reverse-blocking tetrode thyristor KKa, second and switches reverse-blocking tetrode thyristor KKb and the 6th reverse-blocking tetrode thyristor KK5;
Between one end B0 that described first switching reverse-blocking tetrode thyristor KKa is arranged at described 4th reverse-blocking tetrode thyristor KK4 and the output of secondary increment coil;
Between the input that described second switching reverse-blocking tetrode thyristor KKb is arranged at described secondary increment coil and common port N;
Between the output that described 6th reverse-blocking tetrode thyristor KK5 is arranged at secondary increment coil and common port N.
Described building-out capacitor group at least comprises three capacitive branch in parallel, and each capacitive branch comprises single-pole single-throw switch (SPST), inductance and the electric capacity of connecting successively, and each single-pole single-throw switch (SPST) is controlled by described control unit.
Realize regulated output voltage by changing the voltage at series connection incremental voltage bucking coil two ends between input and output, when automatic voltage regulation switches, can not cause because of switching transient voltage be zero situation, thus the continuity of guarantee output voltage.
This device adopts stepping regulative mode to realize regulated output voltage function, when input voltage Ui is different " under-voltage " magnitude of voltage, voltage regulator switches in different gears by inner interchange thyristor (bidirectional triode thyristor), thus obtain different voltage increment value △ U, ensure that output voltage values is within scope of design 220V ± 5%.
In this example, namely device needs the voltage range promoted to be defined as 158V ~ 210V to the adjustable extent of line voltage distribution, namely line voltage 220V* (1-30%) to 220V* (1-5%), input voltage Ui and controllable silicon 1 ~ 4 operation range corresponding relation design as follows:
In boost process, KK4, KK5 are closed, and KKa, KKb disconnect;
Gear 4: as Ui >=210V, input KK0 and S0 disconnects, now Uo=Ui;
During gear 3:210<Ui>194V, S1, KK4 and KK3 are closed, Uo=220V ± 5%;
During gear 2:193<Ui>176V, S1, KK4 and KK2 are closed, Uo=220V ± 5%;
During gear 1:175<Ui>158V, S1, KK4 and KK1 are closed, Uo=220V ± 5%;
As Ui>230V, the polarity of secondary coil △ U, by A.C. contactor reversal connection, makes boost function switch to buck functionality, disconnects by KK4 and KK5, KKa and KKb closes, its gear and boosting gear one_to_one corresponding; Can step-down scope be 230 ~ 281V.
Above-mentioned control unit can be realized by comparison circuit and delay circuit, also can realize automatic control process by existing chip.
Reactive power compensation part is by by realizing at device output 3 group capacitors in parallel: Capacitor banks is made up of the power capacitor of 3 kinds of different capabilities, 3 kinds of compensation capacities are than being 1:2:4, be divided into 7 to compensate gear, then can provide 7 compensation gears increased progressively successively according to the combination of different switchings.
Approximately can reach 0.60 when agricultural power network line power factor is minimum, device makes power factor bring up to 0.95 after compensating, and looking into reactive compensation capacity design factor table, can to obtain coefficient be 1.005, then the maximum reactive compensation capacity of device is equal with rated power.
Claims (7)
1. distribution line end automatic voltage regulation and a reactive power compensator, is characterized in that, comprises increment transformer, building-out capacitor group, thyristor switch group, signal gathering unit and control unit;
Described signal gathering unit is connected with output with the input of increment transformer;
Between the output that described building-out capacitor group is parallel to described increment transformer and common port N;
Switch in described thyristor switch group is connected with each magnet-wire coil tap of increment transformer;
Described signal gathering unit, building-out capacitor group and signal gathering unit are all connected with described control unit.
2. device according to claim 1, is characterized in that, described increment transformer comprises elementary magnet exciting coil and secondary increment coil, and described elementary magnet exciting coil at least comprises two taps, and described secondary increment coil at least comprises the coil of three sections of series connection.
3. device according to claim 2, it is characterized in that, described thyristor switch group at least comprises four reverse-blocking tetrode thyristors, and four reverse-blocking tetrode thyristors are followed successively by the first reverse-blocking tetrode thyristor KK1, the second reverse-blocking tetrode thyristor KK2, the 3rd reverse-blocking tetrode thyristor KK3 and the 5th reverse-blocking tetrode thyristor KK0;
Wherein, the tap of described elementary magnet exciting coil is connected with the input of described secondary increment coil by the 5th reverse-blocking tetrode thyristor KK0;
Each section of coil output of described secondary increment coil is connected to common port N respectively by the first reverse-blocking tetrode thyristor KK1, the second reverse-blocking tetrode thyristor KK2 and the 3rd reverse-blocking tetrode thyristor KK3.
4. device according to claim 3, is characterized in that, is provided with dropping resistor between the input of described elementary magnet exciting coil and the 5th reverse-blocking tetrode thyristor KK0.
5. device according to claim 4, it is characterized in that, described thyristor switch group also comprises the 4th reverse-blocking tetrode thyristor KK4, and described 4th reverse-blocking tetrode thyristor KK4 one end B0 is connected with the input of elementary excitation magnetic coil by a movable end of air switch S1, other end B1 is connected with the input of secondary increment coil;
Another movable end of described air switch S1 is by A.C. contactor ground connection, and the switch S 0 of described A.C. contactor is arranged at the two ends of elementary excitation magnetic coil, and the line bag of described A.C. contactor is controlled by air switch S1.
6. device according to claim 5, it is characterized in that, also comprise the buck changeover module be connected with control unit, described buck changeover module comprises the first switching reverse-blocking tetrode thyristor KKa, second and switches reverse-blocking tetrode thyristor KKb and the 6th reverse-blocking tetrode thyristor KK5;
Between one end B0 that described first switching reverse-blocking tetrode thyristor KKa is arranged at described 4th reverse-blocking tetrode thyristor KK4 and the output of secondary increment coil;
Between the input that described second switching reverse-blocking tetrode thyristor KKb is arranged at described secondary increment coil and common port N;
Between the output that described 6th reverse-blocking tetrode thyristor KK5 is arranged at secondary increment coil and common port N.
7. the device according to any one of claim 1-6, it is characterized in that, described building-out capacitor group at least comprises three capacitive branch in parallel, and each capacitive branch comprises single-pole single-throw switch (SPST), inductance and the electric capacity of connecting successively, and each single-pole single-throw switch (SPST) is controlled by described control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520784091.2U CN205004752U (en) | 2015-10-10 | 2015-10-10 | Terminal automatic voltage regulation of distribution lines and reactive power compensator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520784091.2U CN205004752U (en) | 2015-10-10 | 2015-10-10 | Terminal automatic voltage regulation of distribution lines and reactive power compensator |
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| CN205004752U true CN205004752U (en) | 2016-01-27 |
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| CN201520784091.2U Expired - Fee Related CN205004752U (en) | 2015-10-10 | 2015-10-10 | Terminal automatic voltage regulation of distribution lines and reactive power compensator |
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| CN (1) | CN205004752U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515013A (en) * | 2016-01-28 | 2016-04-20 | 南京交通职业技术学院 | Reactive compensation device achieving voltage regulation through combined transformers |
| CN109088411A (en) * | 2018-08-28 | 2018-12-25 | 贵州电网有限责任公司 | A kind of terminal voltage fining regulator |
-
2015
- 2015-10-10 CN CN201520784091.2U patent/CN205004752U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515013A (en) * | 2016-01-28 | 2016-04-20 | 南京交通职业技术学院 | Reactive compensation device achieving voltage regulation through combined transformers |
| CN105515013B (en) * | 2016-01-28 | 2018-03-23 | 南京交通职业技术学院 | A kind of reactive power compensator of transformer combination pressure regulation |
| CN109088411A (en) * | 2018-08-28 | 2018-12-25 | 贵州电网有限责任公司 | A kind of terminal voltage fining regulator |
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| Date | Code | Title | Description |
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| 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: 20160127 Termination date: 20191010 |