CN201878088U - Automatic voltage regulator of switching voltage regulator (SVR) line - Google Patents
Automatic voltage regulator of switching voltage regulator (SVR) line Download PDFInfo
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- CN201878088U CN201878088U CN2010205818184U CN201020581818U CN201878088U CN 201878088 U CN201878088 U CN 201878088U CN 2010205818184 U CN2010205818184 U CN 2010205818184U CN 201020581818 U CN201020581818 U CN 201020581818U CN 201878088 U CN201878088 U CN 201878088U
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Abstract
The utility model relates to an automatic voltage regulator of a switching voltage regulator (SVR) line, which consists of a three-phase autotransformer, a three-phase vacuum on-load tap switch and an intelligent automatic controller. The three-phase autotransformer consists of a series excitation coil, a parallel excitation coil and a control coil, wherein the series excitation coil is a winding with a plurality of taps which are connected between an input end and an output end in series through different contacts of the vacuum on-load tap switch; the parallel excitation coil is the common winding of the autotransformer; and the control coil is used for providing a working power supply and sampling signals for the controller. The intelligent automatic controller is the core part of the entire device and consists of a single-chip microcomputer, a display circuit, a key circuit, a voltage sampling circuit, a current sampling circuit, a status input, a communication port, a control output and a data storage circuit, wherein all parts are respectively and electrically connected with the control chip of the single-chip microcomputer. By using the automatic voltage regulator of the SVR line, the impacts of voltage fluctuation in power transmission and distribution lines are greatly reduced.
Description
Technical field:
The present invention relates to the voltage regulator technology of power transmission and distribution circuit.
Background technology
The factor that causes voltage fluctuation in the power transmission and distribution circuit is a lot, as, the 10kV distribution line of remote districts, rural area, be subjected to the influence of objective factors such as radius of electricity supply is long, lead is thin, circadian variation voltage fluctuation in season is bigger, especially during the busy farming season irrigates, load sharply increases, and quality of voltage is difficult to satisfy the demand of electricity consumption.And for example, some industrial enterprise are along with the demand of development, and load constantly increases, and original supply line does not catch up with the needs of development.
The counter-measure of taking at present mainly contains following several:
1, newly-built transformer station;
2, adjust the transforming plant main transformer tap, to change system voltage;
3, reasonable distribution reactive-load compensation equipment in system distributes with the reactive power flow that improves electrical network;
4, change line parameter circuit value by the pressure regulation purpose, select sectional area of wire by the allowable voltage loss;
5, increase transformer station's outlet way, to disperse former line load.
Above-mentioned several way:
1, newly-built transformer station----construction period is long, it is slow to invest the costly speed that takes effect;
Adjust the transforming plant main transformer tap, mainly be that busbar voltage with transformer station is a benchmark, the busbar voltage restriction is satisfied within the specific limits the requirement of voltage deviation in the radius, but can't satisfy long voltage request apart from supply line's end, and substation bus bar has many outlets, the load curve of each bar outlet is also had nothing in common with each other, pressure drop is also different, the voltage that can not guarantee all circuits all meets the demands, therefore the flexibility of this pressure regulation method, specific aim is poor, when complex circuit, tend to cause apart from the near local voltage of transformer station higher, on the low side apart from the local voltage that transformer station is far away.
2, capacitor compensation---mainly be the power factor that improves circuit, and voltage regulation result is limited, only relies on capacitor compensation not solve because the voltage that circuit is long, the line footpath is thin, resistance causes reduces problem.
3, adopt----such as increase conductor cross-section and newly-increased circuits long-investment cycle, it is slow to take effect.
Summary of the invention
The objective of the invention is to, overcome the deficiency of prior art, a kind of SVR circuit automatic voltage regulator that can reduce voltage fluctuation influence in the power transmission and distribution circuit is provided.
Concrete technical scheme of the present invention is:
SVR circuit automatic voltage regulator has three parts and constitutes: 3-phase autotransformer, three-phase vacuum on-load operation switch and intelligentized automatic controller.
The whole winding of 3-phase autotransformer is divided into three parts: series excitation coil, shunt wound coil, control coil.Wherein, series excitation coil is a winding that a plurality of taps are arranged, and these taps are connected between the input and output by the different contacts of three-phase on load tap changer, changes tap position, thereby changes the autotransformer no-load voltage ratio, reaches the purpose of adjusting voltage; The three-phase shunt wound coil is the common winding of autotransformer, produces the magnetic field of transmitting energy; Control coil provides working power and sampled signal for controller.
The three-phase vacuum on-load operation switch, be can be under load-carrying situation the switch of changeover contact.In automatic voltage regulator, the tap of series connection winding is connected on the different contacts of three-phase vacuum on-load operation switch, can regulate transformer voltage ratio by changeover contact and change its output voltage.Consider three-phase vacuum on-load operation switch life-span and user's pressure regulation required precision, the gear of the general on load tap changer of using always is 7,9 grades two kinds.
Intelligentized automatic controller is the core of whole device, it mainly is made up of circuit such as singlechip control chip, display circuit, key circuit, voltage sample, current sample, state input, PORT COM, controlling output circuit, storage, and described each several part is electrically connected with singlechip control chip respectively; Intelligentized automatic controller is gathered voltage, electric current, state input signal, handles by singlechip control chip, is shown by display circuit, is shifted gears by controlling output circuit operation vacuum shunting switch.Key circuit wherein is in order to design the parameter modification in the control single chip computer chip.PORT COM designs in order to carry out transfer of data.Used computer technology, electronic technology, employing army grade control chip, reliability height, antijamming capability can adapt to outdoor border by force and badly encircle.Adopt P0-P1-P2 voltage signal and C1, the C2 current signal then with program in set point compare: exceed the set point upper limit, send commands for controlling three-phase vacuum on-load operation switch and raise; Exceed the set point lower limit, send control three-phase vacuum on-load operation switch downward modulation instruction, carry out the pressure regulation operation.Classify system's composition diagram of intelligent automatic control device down as:
The effect of this intelligentized automatic controller is:
1. intelligent automatic adjustment electric line voltage improves quality of voltage and improves rate of qualified voltage.It is strong that intelligentized automatic controller has been used computer technology, electronic technology, employing army grade control chip, reliability height, antijamming capability, can adapt to outdoor border and badly encircle.Flexible setting for parameters has the RS485 communication interface, can monitor and revise parameter to intelligentized automatic controller with notebook computer in 30 meters by the wireless data module, can in time adjust according to actual conditions, need not manual operation again after debugging is good.From motion tracking input voltage vary stable output voltage, have output voltage, electric current, action frequency, current gear, high tap position, lowest gear indication.Defencive function is perfect, has: the gear upper limit, gear lower limit, overcurrent protection, temperature protection, under-voltage protection, overvoltage protection etc.
2.SVR circuit automatic voltage regulator serial connection in the line, by the action of control vacuum on-load operation switch, in time solves rear end brownout in the long transmission line on the spot, voltage fluctuation is big, line loss height, problem such as substation site is sparse.As shown in Figure 3: (solid line part) voltage when circuit is transferred to the 30KM place drops to below the 9KV, has been lower than national standard, and the later voltage instruction of 30KM just is difficult to guarantee; At this moment at A point 25KM SVR circuit automatic voltage regulator is installed the voltage of this point is brought up to 10.5KV (dotted portion), so just increase or prolonged supply district.
3. the breakthrough traditional control method realizes that the big antijamming capability of meticulous control and adjusting range is strong.Intelligent controller has adopted army's grade control chip to improve security of products and high reliability; Properties of product are further promoted, strengthened antijamming capability.He is divided into 6 (7 grades) or 8 (9 grades) intervals with adjusting range SVR circuit automatic voltage regulator, whenever changes one grade and is all judged whether to carry out gear shift operation by intelligent controller, has realized meticulous control.
The invention has the beneficial effects as follows:
The present invention's it " SVR circuit automatic voltage regulator ", changed the conventional voltage adjustment modes, adopt vacuum on-load operation switch, many defectives of having avoided the oil immersed type on load tap changer to exist, as: oil immersed type shunting switch frequent movement must quicken the aging dielectric strength that causes of insulating oil to be reduced, also can cause phase fault when serious, this just need be according to the regular oil strain of action situation of shunting switch, change oil or install oil filter etc. additional, strengthened the maintenance of equipment, and adopt vacuum on-load operation switch of the present invention, can avoid the carbonization of shunting switch oil, improve the fail safe and the reliability of package unit greatly.The present invention has developed intelligent controller to finish the real-time detection to electrical network in conjunction with computer technology, and the action of control vacuum on-load operation switch reaches the purpose of automatic adjustment voltage, and long transmission line is had more tangible pressure regulating performance.Can improve the supply power voltage quality, again can energy-saving and emission-reduction, consumption reduction.
This product is the energy-conservation of consumption reduction product of collection computer technology, electronic technology, power technology, electromechanical integration technology.Real-time monitoring, the action of control vacuum on-load operation switch that its intelligent controller is finished electrical network parameter realize quality of voltage detection, control and the comprehensive regulation.
Its great advantage is:
(1), adopt the auto-type transformer structure, can in ± 20% scope, realize loaded automatic voltage-regulating.
(2), have fine control performance and communication function, realized remote measurement, remote signalling, remote regulating and remote control " four is distant " function.
(3), unique interference protection measure, assurance controller operate as normal have been adopted.
(4), adopt vacuum on-load operation switch, many defectives of having avoided the oil immersed type on load tap changer to exist; Adopt hermetically sealed design, prevent that air from entering, reduce the degradation speed of oil, thereby reduce its maintenance cost greatly.
(5), volume is little, capacity is big, in light weight, loss is low, be easy to install;
(6), has significant energy-conservation of consumption reduction effect;
(7), cost performance height, reliability height.
Below in conjunction with embodiment of accompanying drawing narration, the present invention will be further described:
Description of drawings
Fig. 1,3-phase autotransformer principle schematic;
Fig. 2, intelligentized automatic controller system form schematic diagram;
Fig. 3, voltage regulation result schematic diagram.
Embodiment
Fig. 1 shows the 3-phase autotransformer principle schematic.
Among the figure: P0-P1-P2 voltage sample PT; C1, C2 current sample CT; A1-A9, B1-B9, C1-C9 is respectively A, B, nine taps of C three-phase; X, Y, Z are the three-phase common port.A, B, C are respectively the three-phase inlet wire; A, b, c are respectively the three-phase outlet
The whole winding of 3-phase autotransformer is divided into three parts: series excitation coil, three-phase shunt wound coil, control coil.Wherein, series excitation coil is a winding that a plurality of taps are arranged, and these taps are connected between the input and output by the different contacts of three-phase on load tap changer, changes tap position, thereby changes the autotransformer no-load voltage ratio, reaches the purpose of adjusting voltage; The three-phase shunt wound coil is the common winding of autotransformer, produces the magnetic field of transmitting energy; Control coil provides working power and sampled signal for controller.
Fig. 2 shows that intelligentized automatic controller system forms schematic diagram
Intelligentized automatic controller mainly is made up of circuit such as C51 Series chip control chip, display circuit, key circuit, voltage sample, current sample, state input, PORT COM, control output, storage.Automatically automatic controller is gathered voltage, electric current, state input signal, delivers to singlechip control chip, is handled by control chip again, shows by display circuit, shifts gears by controlling output circuit operation vacuum shunting switch.Wherein key circuit is in order to design the parameter modification in the control chip, and PORT COM designs in order to carry out transfer of data.Used computer technology, electronic technology, employing army grade control chip, reliability height, antijamming capability can adapt to outdoor border by force and badly encircle.It adopts P0-P1-P2 voltage signal and C1, and the C2 current signal compares with set point in the program then: exceed the set point upper limit and send commands for controlling three-phase vacuum on-load operation switch and raise; Exceed the set point lower limit, send control three-phase vacuum on-load operation switch downward modulation instruction, carry out the pressure regulation operation.
Fig. 3 shows the voltage regulation result schematic diagram.
In voltage regulating transformer serial connection in the line, by the action of control vacuum on-load operation switch, in time solve rear end brownout in the long transmission line on the spot, voltage fluctuation is big, line loss height, problem such as substation site is sparse.
Among the figure: (solid line part) voltage when circuit is transferred to the 30KM place drops to below the 9KV, has been lower than national standard, and the later voltage instruction of 30KM just is difficult to guarantee; At this moment at A point (the A point is the SVR mounting points) 25KM the SVR automatic voltage regulator is installed the voltage of this point is brought up to 10.5KV (dotted portion), so just increase or prolonged supply district.
Claims (2)
1.SVR the circuit automatic voltage regulator is characterized in that: form by 3-phase autotransformer, three-phase vacuum on-load operation switch and intelligentized automatic controller;
Described 3-phase autotransformer, its whole winding is divided into three parts: series excitation coil, shunt wound coil and control coil, and wherein, series excitation coil is a winding that a plurality of taps are arranged, these taps are connected between the input and output by the different contacts of vacuum on-load operation switch; Shunt wound coil is the common winding of autotransformer; Control coil provides working power and sampled signal for controller;
The tap of series connection winding is connected on the different contacts of three-phase vacuum on-load operation switch in the 3-phase autotransformer, can regulate the autotransformer no-load voltage ratio by changeover contact and change its output voltage;
Intelligentized automatic controller, be made up of singlechip control chip, display circuit, key circuit, voltage sample, current sample, state input, PORT COM, controlling output circuit, data storage circuitry, each several part is electrically connected with singlechip control chip respectively.
2. according to the described SVR circuit of claim 1 automatic voltage regulator, it is characterized in that: the gear of the on load tap changer of said three-phase vacuum on-load operation switch is 7,9 grades two kinds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205818184U CN201878088U (en) | 2010-10-27 | 2010-10-27 | Automatic voltage regulator of switching voltage regulator (SVR) line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205818184U CN201878088U (en) | 2010-10-27 | 2010-10-27 | Automatic voltage regulator of switching voltage regulator (SVR) line |
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| CN201878088U true CN201878088U (en) | 2011-06-22 |
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| CN2010205818184U Expired - Lifetime CN201878088U (en) | 2010-10-27 | 2010-10-27 | Automatic voltage regulator of switching voltage regulator (SVR) line |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882212A (en) * | 2012-10-22 | 2013-01-16 | 福建阳谷智能技术有限公司 | Novel adaptive medium-voltage adjusting and transforming system |
| CN103178764A (en) * | 2012-09-26 | 2013-06-26 | 辽宁省电力有限公司大连供电公司 | Method and system for adjusting on-load tapping switch of flexible direct-current transmission connected transformer |
| CN103177860A (en) * | 2013-03-01 | 2013-06-26 | 戴如宏 | Stereoscopic rolling iron core intelligent transformer |
| CN107887914A (en) * | 2017-11-17 | 2018-04-06 | 国网江苏省电力公司常州供电公司 | Rural power grids 10kV line voltage distributions self-checking device and method |
| US10211644B2 (en) | 2016-02-26 | 2019-02-19 | Abb Schweiz Ag | System and method for regulating voltage in a low voltage power distribution system |
| CN112467738A (en) * | 2020-12-09 | 2021-03-09 | 浙江富杰电气有限公司 | SVR on-line feeder automatic voltage regulation and stabilization transformer |
-
2010
- 2010-10-27 CN CN2010205818184U patent/CN201878088U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178764A (en) * | 2012-09-26 | 2013-06-26 | 辽宁省电力有限公司大连供电公司 | Method and system for adjusting on-load tapping switch of flexible direct-current transmission connected transformer |
| CN103178764B (en) * | 2012-09-26 | 2016-02-24 | 辽宁省电力有限公司大连供电公司 | The control method of flexible DC power transmission tietransformer on load tap changer and system |
| CN102882212A (en) * | 2012-10-22 | 2013-01-16 | 福建阳谷智能技术有限公司 | Novel adaptive medium-voltage adjusting and transforming system |
| CN102882212B (en) * | 2012-10-22 | 2014-10-29 | 福建阳谷智能技术有限公司 | Novel adaptive medium-voltage adjusting and transforming system |
| CN103177860A (en) * | 2013-03-01 | 2013-06-26 | 戴如宏 | Stereoscopic rolling iron core intelligent transformer |
| US10211644B2 (en) | 2016-02-26 | 2019-02-19 | Abb Schweiz Ag | System and method for regulating voltage in a low voltage power distribution system |
| CN107887914A (en) * | 2017-11-17 | 2018-04-06 | 国网江苏省电力公司常州供电公司 | Rural power grids 10kV line voltage distributions self-checking device and method |
| CN112467738A (en) * | 2020-12-09 | 2021-03-09 | 浙江富杰电气有限公司 | SVR on-line feeder automatic voltage regulation and stabilization transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Automatic voltage regulator of switching voltage regulator (SVR) line Effective date of registration: 20151109 Granted publication date: 20110622 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: Shaanxi Sifang Huaneng Electric Equipment Co., Ltd. Registration number: 2015990000970 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110622 |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Patent director of Shaanxi Sifang Huaneng Electrical Equipment Co., Ltd Document name: Notice of expiration of patent right |