CN204992592U - Static synchronous cascade compensation device - Google Patents
Static synchronous cascade compensation device Download PDFInfo
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- CN204992592U CN204992592U CN201520465974.7U CN201520465974U CN204992592U CN 204992592 U CN204992592 U CN 204992592U CN 201520465974 U CN201520465974 U CN 201520465974U CN 204992592 U CN204992592 U CN 204992592U
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- Prior art keywords
- transformer
- converter
- branch road
- inductance
- secondary winding
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- 230000003068 static effect Effects 0.000 title claims abstract description 19
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 19
- 238000004804 winding Methods 0.000 claims abstract description 34
- 238000004146 energy storage Methods 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 14
- 238000011217 control strategy Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a static synchronous cascade compensation device, the device is including step up transformer, wave filter, converter, energy storage unit, the bypass switch and isolator, on step up transformer's the looks power transmission line of primary winding series connection between two electric wire nettings, secondary is connected with the wave filter, it has an isolator all to establish ties on the power transmission line between primary winding and every electric wire netting, the bypass switch's figure also is three, connects in parallel respectively at step up transformer's both ends, the converter is connected between energy storage unit and wave filter. Compared with the prior art, the utility model provides a pair of static synchronous cascade compensation device can provide active power to the circuit to can keep circuit reactance and the high ratio of resistance, enlarge the device efficiency, improve the reliability of device.
Description
Technical field
The utility model relates to transmission of electricity control field, is specifically related to a kind of Static Synchronous Series compensation arrangement.
Background technology
Static Series Synchronous Compensator (SSSC, StaticSynchronousSeriesCompensator) the voltage source converter technology based on turn-off device is adopted, series connection synchronous voltage source in the line can be equivalent to, the voltage source that one is orthogonal with line current by injecting, amplitude is controlled changes the equiva lent impedance of transmission line, thus control circuit trend.As shown in Figure 1, this Static Synchronous Series compensation arrangement by one independently DC capacitor provide direct voltage to support.
If SSSC device DC side access energy-storage units, then SSSC device can also provide active power when circuit active power is not enough to circuit, becomes series connection static generator in the line.When system active power is superfluous, SSSC device also can absorb active power, by electrical power storage in the energy-storage units of DC side.If so SSSC device DC side access energy-storage units, SSSC device not only may be used for the voltage of adjusting circuit, can also have the effect of certain regulating system frequency.In addition, in high-tension power transmission line, usually only consider the reactance of circuit and ignore the resistance of circuit, this is because the ratio of line reactance and resistance is larger on high voltage transmission line.But after the total reactance in line midline road reduces, the ratio of the total reactance of transmission line and resistance just reduces greatly, and the larger line transmission ability of reactance resistance ratio is stronger, and reactance resistance ratio hour line transmission ability also can be more weak.And DC side adopts the SSSC device of energy-storage units can not only compensated line reactance, can also compensated line resistance, therefore can line reactance resistance ratio be made as far as possible large by control SSSC, thus greatly improve the transmittability of circuit.As shown in Figure 2, based on the traditional structure of the Static Synchronous Series compensation arrangement of energy-storage units, auxiliary rectifier should be adopted to charge to energy-storage units, adds the complexity of system, also improve cost.
To sum up, need to provide a kind of novel Static Synchronous series compensation device, active power can be provided to transmission line, and maintain the impedance of transmission line and resistance ratios to improve its effect.
Summary of the invention
In order to meet the needs of prior art, the utility model provides a kind of Static Synchronous Series compensation arrangement.
The technical solution of the utility model is:
Described device comprises step-up transformer, filter, converter, energy-storage units, by-pass switch and isolating switch;
On the primary windings connected in series of the described step-up transformer phase power transmission line between two electrical networks, secondary winding is connected with described filter; Power transmission line between described armature winding and each electrical network is all in series with a described isolating switch;
The number of described by-pass switch is also three, is connected in parallel on the two ends of described step-up transformer respectively;
Described converter is connected between described energy-storage units and filter.
Preferably, described filter comprises a LC branch road, the 2nd LC branch road and the 3rd LC branch road; One LC branch road, the 2nd LC branch road and the 3rd LC branch road are by inductance and capacitances in series composition;
Described step-up transformer comprises the first step-up transformer, the second step-up transformer and the 3rd step-up transformer;
Preferably, in described first step-up transformer, one end of secondary winding is connected in a described LC branch road between inductance and electric capacity, and the other end of secondary winding is connected with the other end of described electric capacity, and described inductance is connected with converter;
In described second step-up transformer, one end of secondary winding is connected in described 2nd LC branch road between inductance and electric capacity, and the other end of secondary winding is connected with the other end of described electric capacity, and described inductance is connected with converter;
In described 3rd step-up transformer, one end of secondary winding is connected in described 3rd LC branch road between inductance and electric capacity, and the other end of secondary winding is connected with the other end of described electric capacity, and described inductance is connected with converter.
Preferably, described converter is voltage source type converter;
Preferably, the two ends of described energy-storage units are parallel with DC capacitor, described DC capacitor and access circuit breaker of connecting between energy-storage units;
A described DC capacitor two ends series arm be made up of switching tube and resistance in parallel.
Compared with immediate prior art, excellent effect of the present utility model is:
A kind of Static Synchronous Series compensation arrangement that the utility model provides, by introducing energy-storage units, can provide active power to circuit, and can maintain line reactance and resistance (X
l/ R) ratios, expand device effect; The circuit topology proposed saves auxiliary rectifier, simplifies the structure, reduces floor space and cost; Converter when charge mode and shaping modes adopts identical control strategy, optimizes control method, improves the reliability of device.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1: Static Synchronous Series compensation arrangement structural representation;
Fig. 2: the Static Synchronous Series compensation arrangement structural diagrams based on energy-storage units is intended to;
Fig. 3: a kind of Static Synchronous Series compensation arrangement structural representation in the utility model embodiment;
Fig. 4: in the utility model embodiment, standby mode controls schematic diagram;
Fig. 5: in the utility model embodiment, charge mode controls schematic diagram;
Fig. 6: in the utility model embodiment, shaping modes controls schematic diagram.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
A kind of Static Synchronous Series compensation arrangement that the utility model provides, active power can be provided to transmission line by increasing energy-storage units, and the ratios of line reactance and resistance can be maintained, expand effect of this device, when charge mode and shaping modes, converter adopts identical control strategy simultaneously, optimize the control method of this device, improve the reliability of device.
In the utility model, the specific embodiment of Static Synchronous Series compensation arrangement as shown in Figure 3, is specially:
This device comprises step-up transformer, filter, converter, energy-storage units, by-pass switch and isolating switch.
On the primary windings connected in series of the step-up transformer phase power transmission line between two electrical networks, secondary winding is connected with filter; Power transmission line between armature winding and each electrical network is all in series with an isolating switch.The number of by-pass switch CB is also three, is connected in parallel on the two ends of step-up transformer respectively; Converter is connected between energy-storage units and filter.The two ends of energy-storage units are parallel with DC capacitor C, DC capacitor C and the access circuit breaker Q F that connects between energy-storage units; A DC capacitor C two ends series arm be made up of switching tube I and resistance R in parallel.
In the present embodiment, converter is voltage source type converter, and step-up transformer comprises the first step-up transformer, the second step-up transformer and the 3rd step-up transformer, and as shown in Figure 3, step-up transformer comprises the first step-up transformer T
a, the second step-up transformer T
bwith the 3rd step-up transformer T
c.
1.: the first step-up transformer T
aone end of middle armature winding is by isolating switch QS
1be connected with electrical network A, the other end is by isolating switch QS
2be connected with electrical network B.
2.: the second step-up transformer T
bone end of middle armature winding is by isolating switch QS
3be connected with electrical network A, the other end is by isolating switch QS
4be connected with electrical network B.
3.: the 3rd step-up transformer T
cone end of middle armature winding is by isolating switch QS
5be connected with electrical network A, the other end is by isolating switch QS
6be connected with electrical network B.
As shown in Figure 3, filter comprises a LC branch road, the 2nd LC branch road and the 3rd LC branch road; One LC branch road, the 2nd LC branch road and the 3rd LC branch road are by inductance L
rwith electric capacity C
rbe composed in series, in step-up transformer, one end of secondary winding is connected between inductance and electric capacity, and the other end of secondary winding is connected with the other end of electric capacity; Inductance is connected with converter.Be specially:
1.: the first step-up transformer T
aone end of middle secondary winding is connected to inductance L in a LC branch road
rwith electric capacity C
rbetween, the other end of secondary winding and electric capacity C
rthe other end connect.
2.: the second step-up transformer T
bone end of middle secondary winding is connected to inductance L in the 2nd LC branch road
rwith electric capacity C
rbetween, the other end of secondary winding and electric capacity C
rthe other end connect.
3.: the 3rd step-up transformer T
cone end of middle secondary winding is connected to inductance L in the 3rd LC branch road
rwith electric capacity C
rbetween, the other end of secondary winding and electric capacity C
rthe other end connect.
In the utility model, the control method of Static Synchronous Series compensation arrangement is: the operating state first judging this device, then chooses control strategy according to operating state; In the present embodiment, the operating state of this device comprises standby mode, charge mode and shaping modes.
1, standby mode
As shown in Figure 4, when device breaks down or need to overhaul, device is in standby mode, and its control strategy comprises:
(1) by-pass switch CB is closed;
(2) by isolating switch QS
1, QS
2, QS
3, QS
4, QS
5and QS
6whole disconnection;
(3) by converter locking;
(4) will be connected in parallel on the switching tube I conducting at DC capacitor C two ends, DC capacitor C is discharged by resistance R;
(5) circuit breaker Q F is disconnected.
2, charge mode
As shown in Figure 5, when the energy-storage units in device needs charging, device is in charge mode, and its control strategy comprises:
(1) by-pass switch CB is disconnected;
(2) by isolating switch QS
1, QS
2, QS
3, QS
4, QS
5and QS
6all closed;
(3) converter is adjusted to rectification state, alternating current is converted to direct current;
(4) the switching tube I being connected in parallel on DC capacitor C two ends is disconnected;
(5) closed by circuit breaker Q F, energy-storage units enters charged state.
3, shaping modes
As shown in Figure 6, when needing to control the Line Flow between electrical network, device is in shaping modes, and its control strategy comprises:
(1) by-pass switch CB is disconnected;
(2) by isolating switch QS
1, QS
2, QS
3, QS
4, QS
5and QS
6all closed;
(3) converter is adjusted to inverter mode, direct current is converted to alternating current;
(4) the switching tube I being connected in parallel on DC capacitor C two ends is disconnected;
(5) when energy-storage units needs to absorb active power, circuit breaker Q F closes; When energy-storage units needs release active power, circuit breaker Q F disconnects.
Finally should be noted that: described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Claims (5)
1. a Static Synchronous Series compensation arrangement, is characterized in that, described device comprises step-up transformer, filter, converter, energy-storage units, by-pass switch and isolating switch;
On the primary windings connected in series of the described step-up transformer phase power transmission line between two electrical networks, secondary winding is connected with described filter; Power transmission line between described armature winding and each electrical network is all in series with a described isolating switch;
The number of described by-pass switch is three, is connected in parallel on the two ends of described step-up transformer respectively;
Described converter is connected between described energy-storage units and filter.
2. device as claimed in claim 1, it is characterized in that, described filter comprises a LC branch road, the 2nd LC branch road and the 3rd LC branch road; One LC branch road, the 2nd LC branch road and the 3rd LC branch road are by inductance and capacitances in series composition;
Described step-up transformer comprises the first step-up transformer, the second step-up transformer and the 3rd step-up transformer.
3. device as claimed in claim 2, is characterized in that,
In described first step-up transformer, one end of secondary winding is connected in a described LC branch road between inductance and electric capacity, and the other end of secondary winding is connected with the other end of described electric capacity, and described inductance is connected with converter;
In described second step-up transformer, one end of secondary winding is connected in described 2nd LC branch road between inductance and electric capacity, and the other end of secondary winding is connected with the other end of described electric capacity, and described inductance is connected with converter;
In described 3rd step-up transformer, one end of secondary winding is connected in described 3rd LC branch road between inductance and electric capacity, and the other end of secondary winding is connected with the other end of described electric capacity, and described inductance is connected with converter.
4. device as claimed in claim 1, it is characterized in that, described converter is voltage source type converter.
5. device as claimed in claim 1, it is characterized in that, the two ends of described energy-storage units are parallel with DC capacitor, described DC capacitor and access circuit breaker of connecting between energy-storage units;
A described DC capacitor two ends series arm be made up of switching tube and resistance in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520465974.7U CN204992592U (en) | 2015-07-01 | 2015-07-01 | Static synchronous cascade compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520465974.7U CN204992592U (en) | 2015-07-01 | 2015-07-01 | Static synchronous cascade compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204992592U true CN204992592U (en) | 2016-01-20 |
Family
ID=55126920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520465974.7U Active CN204992592U (en) | 2015-07-01 | 2015-07-01 | Static synchronous cascade compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204992592U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917195A (en) * | 2015-07-01 | 2015-09-16 | 国网智能电网研究院 | Static synchronous series compensation device and control method thereof |
| CN105703392A (en) * | 2016-03-08 | 2016-06-22 | 全球能源互联网研究院 | Combined type unified power flow controller |
-
2015
- 2015-07-01 CN CN201520465974.7U patent/CN204992592U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917195A (en) * | 2015-07-01 | 2015-09-16 | 国网智能电网研究院 | Static synchronous series compensation device and control method thereof |
| CN104917195B (en) * | 2015-07-01 | 2018-10-26 | 全球能源互联网研究院 | A kind of Static Synchronous Series compensation device and its control method |
| CN105703392A (en) * | 2016-03-08 | 2016-06-22 | 全球能源互联网研究院 | Combined type unified power flow controller |
| CN105703392B (en) * | 2016-03-08 | 2024-04-16 | 全球能源互联网研究院 | Combined type unified power flow controller |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |