CN2631097Y - Dynamic reactive compensating and filtering device - Google Patents
Dynamic reactive compensating and filtering device Download PDFInfo
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- CN2631097Y CN2631097Y CN 03262496 CN03262496U CN2631097Y CN 2631097 Y CN2631097 Y CN 2631097Y CN 03262496 CN03262496 CN 03262496 CN 03262496 U CN03262496 U CN 03262496U CN 2631097 Y CN2631097 Y CN 2631097Y
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Abstract
The utility model relates to a dynamic reactive power compensation filtering device, including an ac passive filtering device, a regulating transformer, a switch group and a controller. The primary side of the regulating transformer is parallel connected with the power network, and the low end of the secondary side thereof is connected with an earth terminal of the ac passive filtering device with a multi-group of tap at its high end. Every group of the tap and a parallel connection end of a capacitance of the ac passive filtering device are series connected with two scr switches reversibly parallel connected. The controller can control the breaking of the scr switch according to the signals getting by the electricity and current of the electricity network. The utility model overcomes the defects of high cost, hard operation and maintenance because the present ac passive filtering device can't satisfy the dynamic reactive power compensation and the static var compensation devices, advantaging in low cost, wide applying range, quick response speed without transient process operation, satisfying the filtering effect, at the same time, providing the dynamic reactive power.
Description
Technical field
The utility model relates to a kind of Electrical Power System Dynamic reactive power compensation and filter.
Background technology
Have a large amount of nonlinear-loads such as rectification, electric furnace, electric locomotive etc. to insert electrical network at present, these loads obtain required reactive power from electrical network, present a large amount of high order harmonic components to electrical network simultaneously, bring influence to grid supply quality.In order to eliminate the higher harmonic current that nonlinear-load produces, need filter to carry out filtering; In order to provide reactive power, need reactive power compensation device to load.In general, filter can provide reactive power compensation simultaneously.
Parallel capacitor device is made up of shunt capacitor and series reactor, mainly satisfies system's reactive power compensation requirement.Its shortcoming is: having under the background of high order harmonic component, harmonic wave is being produced amplify easily, can cause system harmonics resonance when serious, power consumption equipment is brought harm.
Exchange passive filtration unit and constitute by certain mode of connection, when absorbing high order harmonic component, carry fixing capacitive reactive power, suppress harmonic wave and reactive power compensation requirement to satisfy to system by filtering capacitor and filter reactor.Its shortcoming is: for the load of frequent fluctuation, be difficult to satisfy the dynamic passive compensation requirement.
Static passive compensation device (SVC) is by Controlled Reactor (TCR) and filter (FC) and monitor protective system formation; its effect is to suppress load or burden without work to change the system voltage fluctuation that is caused significantly; improve power factor simultaneously and absorb high order harmonic component, improve the supply network quality of power supply.Its median filter is carried fundamental wave reactive power power to system regularly, to satisfy the power factor compensation requirement and to absorb high order harmonic component; Monitor protective system is regulated the inductance current of Controlled Reactor smoothly according to the idle situation of change of system, suppresses the fluctuation of load or burden without work, reduces voltage change ratio.Its shortcoming is: the cost height, the operation and maintenance difficulty is big.
The utility model content
The utility model has solved and has exchanged passive filtration unit in the background technology and can't satisfy dynamic passive compensation and static passive compensation device cost height, technical problem that the operation and maintenance difficulty is big.
Technical solution of the present utility model is: this dynamic passive compensation and filter comprise interchange passive filtration unit 3, controller 1, switches set 5, current transformer 12 and voltage transformer 11, the two ends of described interchange passive filtration unit 3 are respectively electric capacity parallel connected end and earth terminal, described switches set 5 comprises many group switches 2, every group of switch 2 is made of two reverse-blocking tetrode thyristor 13 reverse parallel connections, the primary side of described current transformer 12 and voltage transformer 11 is connected with electrical network respectively, secondary side is connected with the input of controller 1 respectively, the control utmost point of the output of described controller 1 and reverse-blocking tetrode thyristor 13 connects one to one, its special character is: described dynamic passive compensation and filter also comprise regulates transformer 4, its primary side is connected with electrical network, its secondary side low side is connected with the earth terminal that exchanges passive filtration unit 3, its secondary side is high-end to be provided with 3 to 8 groups of taps, the quantity of the switch 2 of described switches set 5 equates with the high-end number of taps of adjusting transformer 4 secondary sides, the high-end every group of tap of described adjusting transformer 4 secondary sides is connected with an end of corresponding one group of switch 2, the other end of described switch 2 connects together and constitutes the pressure regulation output of switches set 5, and this pressure regulation output is connected with the electric capacity parallel connected end that exchanges passive filtration unit 3.
Above-mentioned interchange passive filtration unit 3 is to be made of 6,5 single tuned filters 7 of 3 single tuned filters and 7 single tuned filter 8 parallel connections.
Above-mentioned interchange passive filtration unit 3 can also be made of 7,7 single tuned filters 8 of 6,5 single tuned filters of 3 single tuned filters and 11 single tuned filter 9 parallel connections.
Above-mentioned interchange passive filtration unit 3 can also be made of 2 single tuned filters, 3 single tuned filters, 4 single tuned filters and 5 single tuned filter parallel connections.
The high-end tap number of above-mentioned adjusting transformer 4 secondary sides is advisable with 6 groups.
The utlity model has following advantage:
1. can dynamically provide reactive power according to the needs of load when satisfying filter effect, cost is low, and is workable;
2. when carrying out reactive power compensation, can increase and decrease the kind of filter according to the needs of filtering, applied range;
Response speed fast, can realize not having the transient process operation.Reverse-blocking tetrode thyristor is finished handoff procedure when the capacitance current zero passage, the harm of impulse current to capacitor of avoiding closing a floodgate; One time handoff procedure has only 10～15ms, can satisfy the reactive power compensation requirement of quick varying loading.
The explanation of accompanying drawing drawing
Accompanying drawing is the utility model principle schematic.
Embodiment
Referring to accompanying drawing, interchange passive filtration unit 3 of the present utility model is formed in parallel by 7,7 single tuned filters 8 of 6,5 single tuned filters of 3 single tuned filters and 11 single tuned filters 9, and the one end is the electric capacity parallel connected end, and the other end is an earth terminal; The primary side of regulating transformer 4 is connected with electrical network, and wherein primary side is high-end is connected with the bus of electrical network, and the primary side low side is connected with the center line of electrical network; The secondary side low side of regulating transformer 4 links to each other with the earth terminal that exchanges passive filtration unit 3, secondary side is high-end to be provided with 6 groups of taps, corresponding secondary side output voltage is followed successively by 1.000 times of primary side voltage rating, 0.880 doubly, 0.768 doubly, 0.653 doubly, 0.537 doubly, 0.421 doubly, 6 groups of switches 2 of switches set 5 relative set, every group of tap is connected with an end of one group of switch 2, each switch 2 is all formed by two reverse-blocking tetrode thyristor 13 reverse parallel connections, the other end of all 6 switches 2 connects together and constitutes the pressure regulation output of switches set 5, and this pressure regulation output is connected with the electric capacity parallel connected end that exchanges passive filtration unit 3; The primary side of current transformer 12 and voltage transformer 11 is connected with electrical network respectively, and its secondary side is connected with the input of controller 1 respectively, and controller 1 is drawn 12 outputs and connected one to one with the control utmost point of 12 reverse-blocking tetrode thyristors 13 of 6 switches 2 respectively.
Reverse-blocking tetrode thyristor 13 can be selected different models according to the difference of network load; For reactive power compensation and the filtering needs that adapt to different load, 2 single tuned filters, 3 single tuned filters, 4 single tuned filters, 5 single tuned filters, 7 single tuned filters, 11 single tuned filters can constitute the interchange passive filtration unit of this device separately, and also two or more sets formations in parallel exchange passive filtration unit arbitrarily.
The utility model principle:
The high-end needs according to actual reactive power compensation and filtering of adjusting Circuit Fault on Secondary Transformer of the present utility model can be provided with 3 to 8 taps, different secondary voltages is provided, exchange passive filtration unit and be connected on high-end tap place of adjusting Circuit Fault on Secondary Transformer by reverse-blocking tetrode thyristor, along with the change that is serially connected in the reverse-blocking tetrode thyristor on off operating mode in the tap, be added in the fundamental voltage that exchanges the passive filtration unit two ends and change thereupon, the fundamental wave reactive power power of its output is shown below:
In the formula:
Q---exchange the fundamental wave reactive power power of passive filtration unit output;
N---exchange the tuning number of times of passive filtration unit;
U---regulate the Circuit Fault on Secondary Transformer fundamental voltage.
By following formula as can be known, exchange the fundamental wave reactive power power Q of passive filtration unit output and square U of its both end voltage
2Be directly proportional.Controller changes the fundamental wave reactive power power output that exchanges passive filtration unit according to the break-make of load variations adjustment transformer tapping, reaches stable operation voltage, improves the effect of power factor.
By L-C tuning relation:
As can be known, exchanging the passive filtration unit both end voltage changes, what change only is fundamental wave reactive power output, its tuner parameters L-C does not change, therefore its filter effect can be guaranteed, reached and to have absorbed the effect that harmonic wave can dynamically be adjusted its reactive power again, solved coordination problem between the two.
The voltage transformer summation current transformer is sent to controller after mains voltage signal and current signal are sampled, controller calculates the power factor of current electrical network according to voltage sampling signal and current sampling signal and compares with set point, send and boost or the step-down control signal, when regulating Circuit Fault on Secondary Transformer reverse-blocking tetrode thyristor both end voltage by the time and be zero, this control signal is controlled the break-make of reverse-blocking tetrode thyristor, finishes the pressure regulation handoff procedure one time.When power factor is low, controller sends the instruction of boosting, make the reverse-blocking tetrode thyristor of regulating the corresponding high voltage tap of Circuit Fault on Secondary Transformer be in conducting state, the reverse-blocking tetrode thyristor of all the other taps is in off-state, the voltage that exchanges the passive filtration unit two ends raises, the corresponding rising of power factor of output of fundamental wave reactive power power and electrical network; When power factor is high, controller sends the step-down instruction, make the reverse-blocking tetrode thyristor of regulating the corresponding low-voltage tap of Circuit Fault on Secondary Transformer be in conducting state, the reverse-blocking tetrode thyristor of all the other taps is in off-state, the voltage that exchanges the passive filtration unit two ends reduces, the corresponding reduction of power factor of output of fundamental wave reactive power power and electrical network.
Exchange each filter parameter of passive filtration unit and no longer press the configuration of voltage resonance condition, but consider to regulate after the transformer leakage inductance, calculate the back according to the electric network transformation results through the special designs program and determine.In the regulation voltage process, electric capacity, the inductance value of each filter no longer change, can satisfy filtering requirements, its fundamental wave reactive power power to electrical network output changes along with the variation of regulating the Circuit Fault on Secondary Transformer terminal voltage simultaneously, can satisfy the dynamic passive compensation requirement of system.
Claims (5)
1. dynamic passive compensation and filter, comprise and exchange passive filtration unit (3), controller (1), switches set (5), current transformer (12) and voltage transformer (11), the two ends of described interchange passive filtration unit (3) are respectively electric capacity parallel connected end and earth terminal, described switches set (5) comprises many group switches (2), every group of switch (2) is made of two reverse-blocking tetrode thyristors (13) reverse parallel connection, described current transformer (12) is connected with electrical network respectively with the primary side of voltage transformer (11), secondary side is connected with the input of controller (1) respectively, the control utmost point of the output of described controller (1) and reverse-blocking tetrode thyristor (13) connects one to one, it is characterized in that: described dynamic passive compensation and filter also comprise regulates transformer (4), its primary side is connected with electrical network, its secondary side low side is connected with the earth terminal that exchanges passive filtration unit (3), its secondary side is high-end to be provided with 3 to 8 groups of taps, the quantity of the switch (2) of described switches set (5) equates with the high-end number of taps of adjusting transformer (4) secondary side, the high-end every group of tap of described adjusting transformer (4) secondary side is connected with an end of corresponding one group of switch (2), the other end of described switch (2) connects together and constitutes the pressure regulation output of switches set (5), and this pressure regulation output is connected with the electric capacity parallel connected end that exchanges passive filtration unit (3).
2. dynamic passive compensation as claimed in claim 1 and filter is characterized in that: described interchange passive filtration unit (3) is to constitute by 3 single tuned filters (6), 5 single tuned filters (7) and 7 single tuned filters (8) are in parallel.
3. dynamic passive compensation as claimed in claim 1 and filter is characterized in that: described interchange passive filtration unit (3) is to constitute by 3 single tuned filters (6), 5 single tuned filters (7), 7 single tuned filters (8) and 11 single tuned filters (9) are in parallel.
4. dynamic passive compensation as claimed in claim 1 and filter is characterized in that: described interchange passive filtration unit (3) is to be made of 2 single tuned filters, 3 single tuned filters, 4 single tuned filters and 5 single tuned filter parallel connections.
5. as described dynamic passive compensation of the arbitrary claim of claim 1 to 4 and filter, it is characterized in that: the high-end tap number of described adjusting transformer (4) secondary side is 6 groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03262496 CN2631097Y (en) | 2003-07-21 | 2003-07-21 | Dynamic reactive compensating and filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03262496 CN2631097Y (en) | 2003-07-21 | 2003-07-21 | Dynamic reactive compensating and filtering device |
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| CN2631097Y true CN2631097Y (en) | 2004-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03262496 Expired - Fee Related CN2631097Y (en) | 2003-07-21 | 2003-07-21 | Dynamic reactive compensating and filtering device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814737A (en) * | 2010-04-15 | 2010-08-25 | 济南银河电气有限公司 | Pressure regulating and capacitance regulating reactive power automatic compensation method |
| CN1942842B (en) * | 2004-03-04 | 2010-09-29 | 美国超导体公司 | Dynamic reactive compensation system and method |
| CN102185321A (en) * | 2011-04-15 | 2011-09-14 | 华中科技大学 | Integrated static compensator of distribution transformer |
| CN102255316A (en) * | 2011-06-23 | 2011-11-23 | 北京博电新能电力科技有限公司 | In-phase static reactive power controller and control method thereof |
| CN111736011A (en) * | 2020-05-19 | 2020-10-02 | 南方电网科学研究院有限责任公司 | Controllable zero sequence current transformer |
-
2003
- 2003-07-21 CN CN 03262496 patent/CN2631097Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1942842B (en) * | 2004-03-04 | 2010-09-29 | 美国超导体公司 | Dynamic reactive compensation system and method |
| CN101814737A (en) * | 2010-04-15 | 2010-08-25 | 济南银河电气有限公司 | Pressure regulating and capacitance regulating reactive power automatic compensation method |
| CN101814737B (en) * | 2010-04-15 | 2012-01-25 | 济南银河电气有限公司 | Pressure regulating and capacitance regulating reactive power automatic compensation method |
| CN102185321A (en) * | 2011-04-15 | 2011-09-14 | 华中科技大学 | Integrated static compensator of distribution transformer |
| CN102185321B (en) * | 2011-04-15 | 2013-02-13 | 华中科技大学 | Integrated static compensator of distribution transformer |
| CN102255316A (en) * | 2011-06-23 | 2011-11-23 | 北京博电新能电力科技有限公司 | In-phase static reactive power controller and control method thereof |
| CN102255316B (en) * | 2011-06-23 | 2013-10-30 | 北京博润新能电力科技有限公司 | In-phase static reactive power controller and control method thereof |
| CN111736011A (en) * | 2020-05-19 | 2020-10-02 | 南方电网科学研究院有限责任公司 | Controllable zero sequence current transformer |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: XIAN TIANNENG POWER SCIENCE CO., LTD. ADDRESS Free format text: FORMER NAME OR ADDRESS: XI AN XIZHENG ELECTRICAL ELECTRONIC EQUIPMENT CO.,LTD. ADDRESS |
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| CP03 | Change of name, title or address |
Address after: Xi'an hi tech three road No. 9 Information Port building 608A, zip code: 710075 Patentee after: Xi'an Tianneng Electronic Technology Co., Ltd. Address before: Shaanxi city of Xi'an province high tech Zone Road No. 10, zip code: 710075 Patentee before: Xizheng Power and Electronic Equipment LLC, Xi'an |
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| C56 | Change in the name or address of the patentee |
Owner name: XIAN TIANNENG POWER SCIENCE CO., LTD. Free format text: FORMER NAME: XI AN XIZHENG ELECTRICAL ELECTRONIC EQUIPMENT CO.,LTD. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040804 Termination date: 20110721 |