CN215580380U - Static synchronous series compensator - Google Patents
Static synchronous series compensator Download PDFInfo
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- CN215580380U CN215580380U CN202121153346.7U CN202121153346U CN215580380U CN 215580380 U CN215580380 U CN 215580380U CN 202121153346 U CN202121153346 U CN 202121153346U CN 215580380 U CN215580380 U CN 215580380U
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 23
- 230000003068 static effect Effects 0.000 title claims abstract description 18
- 238000004146 energy storage Methods 0.000 claims abstract description 63
- 238000002955 isolation Methods 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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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]
Abstract
The utility model relates to a static synchronous series compensator, comprising: the system comprises an isolation series transformer, an H bridge current conversion unit with energy storage, a quick bypass switch, a control system, an equipment bypass switch, a first line switch and a second line switch. The utility model can really realize the quick start and quick adjustment of the static synchronous series compensator under different working conditions, and improve the safety and stability of the power system.
Description
Technical Field
The utility model belongs to the technical field of power compensation of power systems, relates to power compensation of a power transmission line with frequently changed tidal current direction, and particularly relates to a static synchronous series compensator.
Background
With the rapid development of a power grid, the structure of the power grid is increasingly complex, a large amount of new energy such as wind power, photovoltaic and the like is accessed, the fluctuation of loads is increased, the power flow distribution of the power grid is unbalanced, the power flow regulation is more difficult, and higher requirements are provided for power flow control technical means of the power grid. Line impedance dynamic adjustment is an effective means for improving the section power flow distribution. The Static Synchronous Series Compensator (SSSC) adopts a single series current converter, is equivalent to control line impedance, has the bidirectional regulation function of limiting and improving the power flow, and is an effective means for solving the power flow problem. The conventional static synchronous series compensator can be started when the line current reaches a certain value, cannot normally run when the line tide is small or the tide direction changes, and can quit running due to self-protection when the power grid fails, so that the conventional SSSC device cannot play a regulating role when the power grid needs to be regulated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a static synchronous series compensator which can really realize the quick start and quick adjustment of the static synchronous series compensator under different working conditions and improve the safety and stability of a power system.
The utility model solves the practical problem by adopting the following technical scheme:
a static synchronous series compensator comprising: the system comprises an isolation series transformer, an H bridge current conversion unit with energy storage, a quick bypass switch, a control system, an equipment bypass switch, a first line switch and a second line switch;
the primary end of the isolation series transformer is connected with the power transmission line in series through a first line switch and a second line switch respectively, and the secondary end of the isolation series transformer is connected with the H bridge commutation unit with the energy storage in parallel and used for boosting the output voltage of the H bridge commutation unit with the energy storage;
the first line switch and the second line switch are used for overhauling operation of equipment;
the equipment bypass switch is connected with the primary end of the isolation series transformer in parallel and is used for bypassing the synchronous series device to enable the isolation series transformer to quit operation;
the quick bypass switch is connected in parallel with the H-bridge commutation unit with the energy storage function and is used for protecting the H-bridge commutation unit with the energy storage function;
the control system is connected with the H bridge commutation unit with the energy storage and is used for adjusting the alternating current output of the H bridge commutation module with the energy storage in the H bridge commutation unit with the energy storage and performing series compensation on the line;
the control system is also connected with the quick bypass switch and is used for protecting the H-bridge converter unit with the energy storage function.
Furthermore, the H-bridge converter unit with energy storage comprises: the H-bridge converter module with the energy storage function comprises a plurality of H-bridge converter modules with the energy storage function, wherein the H-bridge converter modules with the energy storage function are connected in series, and each H-bridge converter module with the energy storage function comprises: the power supply comprises an H-bridge structure consisting of IGBTs, an energy storage battery, a bypass circuit consisting of thyristors and a direct current capacitor; the input side of an H-bridge structure formed by the IGBTs is respectively connected with the energy storage battery and the direct current capacitor in parallel, and the output side of the H-bridge structure is connected with the bypass circuit in parallel.
And the bypass circuit is composed of two thyristors which are connected in series end to end.
Moreover, the control system adopts TMS320C28335 series floating point DSP controller.
The utility model has the advantages and beneficial effects that:
the utility model provides a static synchronous series compensator which comprises a series transformer, an H-bridge converter module with energy storage, a quick bypass switch and a control system. Through the design, the static synchronous series compensator can be started and adjusted quickly under different working conditions, and the safety and stability of a power system are improved.
The utility model solves the problem that the static synchronous series connection device keeps normal starting and working under different power grid working conditions. When the power grid has sudden regulation requirement, even has fault, the device can immediately play a regulating role, and the influence of the power grid fault on the safe and stable operation of the power grid is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of an H-bridge converter module with energy storage according to the present invention;
in the figure 1, a series transformer is isolated; 2. an H bridge current conversion unit with energy storage; 3. a fast bypass switch; 4. a control system; 5. an equipment bypass switch; 6. a first line switch; 7. a second line switch; 8. an H-bridge structure composed of IGBTs; 9. an energy storage battery; 10. a bypass circuit.
Detailed Description
The embodiments of the utility model will be described in further detail below with reference to the accompanying drawings:
a static synchronous series compensator, as shown in fig. 1 and 2, comprising: the system comprises an isolation series transformer 1, an H bridge commutation unit 2 with energy storage, a fast bypass switch 3, a control system 4, an equipment bypass switch 5, a first line switch 6 and a second line switch 7;
the primary end of the isolation series transformer 1 is connected with the power transmission line in series through a first line switch 6 and a second line switch 7 respectively, and the secondary end of the isolation series transformer 1 is connected with the H bridge commutation unit 2 with the energy storage in parallel and used for boosting the output voltage of the H bridge commutation unit 2 with the energy storage;
the first line switch 6 and the second line switch 7 are used for maintenance operation of equipment;
the equipment bypass switch 5 is connected with the primary end of the isolation series transformer 1 in parallel and is used for bypassing the synchronous series device to enable the isolation series transformer to quit operation;
the fast bypass switch 3 is connected in parallel with the H bridge commutation unit with energy storage and is used for protecting the H bridge commutation unit with energy storage;
the control system 4 is connected with the H-bridge commutation unit 2 with the energy storage and is used for adjusting the alternating current output of the H-bridge commutation module with the energy storage in the H-bridge commutation unit with the energy storage and performing series compensation on the line.
The control system 4 is also connected with the fast bypass switch 3 and is used for protecting an H bridge converter unit of the energy storage of the belt;
in this embodiment, the H-bridge converter unit 2 with energy storage includes: the H-bridge converter module with the energy storage function comprises a plurality of H-bridge converter modules with the energy storage function, wherein the H-bridge converter modules with the energy storage function are connected in series, and each H-bridge converter module with the energy storage function comprises: an H-bridge structure 8 consisting of IGBTs, an energy storage battery 9, a bypass circuit 10 consisting of thyristors and a direct current capacitor 11; the input side of an H-bridge structure formed by IGBTs is respectively connected with the energy storage battery 9 and the direct current capacitor 11 in parallel, and the output side of the H-bridge structure is connected with the bypass circuit 10 in parallel.
In the present embodiment, the bypass circuit 10 is composed of two thyristors connected end to end in series.
In this embodiment, the control system employs a TMS320C28335 series floating point DSP controller.
The functions and functions of the components of the utility model are as follows:
the isolation series transformer 1 has the function of boosting the output voltage of the H bridge current conversion unit with the energy storage, the H bridge current conversion unit 2 with the energy storage has the function of inverting the direct-current voltage on the energy storage side into the required alternating-current voltage, the quick bypass switch 3 has the function of quickly closing when the H bridge current conversion unit is in overcurrent or overvoltage, the safety of the current conversion unit is guaranteed, the control system 4 is used for controlling the H bridge current conversion inversion and the energy storage system rectification process, the equipment bypass switch 5 has the function of bypassing the synchronous series device and enabling the synchronous series device to quit operation, and the first line switch 6 and the second line switch 7 are used for overhauling equipment.
The fast bypass switch 3 is used for protecting an H bridge converter unit of the energy storage of the belt; the H bridge current conversion unit with the energy storage function comprises: an H-bridge structure 8 formed by IGBTs, an energy storage battery 9, a bypass circuit 10 formed by thyristors and a direct current capacitor 11. And an input side of an H-bridge structure formed by the IGBTs is connected with the energy storage battery 9 and the direct current capacitor 11 in parallel, and an output side of the H-bridge structure is connected with the bypass circuit 10 in parallel.
The working principle of the utility model is as follows:
when the line is put into operation but the device is not put into operation, the equipment bypass switch 5, the first line switch 6 and the second line switch 7 are all in a closing state, the H bridge commutation unit 2 with the energy storage is in a bypass state, the equipment bypass switch 5 is disconnected, and the series transformer 1 is put into operation, so that the alternating current output of the commutation module can be controlled through the control system 4 no matter the line current, the line is subjected to series compensation, meanwhile, the electric quantity of the energy storage battery is monitored, the electric energy is supplemented timely, and the normal operation of the equipment can be maintained when the line tide is smaller.
The control process realized by the control system in the utility model can be realized by adopting the conventional technology, and is not the innovative content of the utility model.
It should be emphasized that the examples described herein are illustrative and not restrictive, and thus the present invention includes, but is not limited to, those examples described in this detailed description, as well as other embodiments that can be derived from the teachings of the present invention by those skilled in the art and that are within the scope of the present invention.
Claims (4)
1. A static synchronous series compensator, comprising: the method comprises the following steps: the system comprises an isolation series transformer, an H bridge current conversion unit with energy storage, a quick bypass switch, a control system, an equipment bypass switch, a first line switch and a second line switch;
the primary end of the isolation series transformer is connected with the power transmission line in series through a first line switch and a second line switch respectively, and the secondary end of the isolation series transformer is connected with the H bridge commutation unit with the energy storage in parallel and used for boosting the output voltage of the H bridge commutation unit with the energy storage;
the first line switch and the second line switch are used for overhauling operation of equipment;
the equipment bypass switch is connected with the primary end of the isolation series transformer in parallel and is used for bypassing the synchronous series device to enable the isolation series transformer to quit operation;
the quick bypass switch is connected in parallel with the H-bridge commutation unit with the energy storage function and is used for protecting the H-bridge commutation unit with the energy storage function;
the control system is connected with the H bridge commutation unit with the energy storage and is used for adjusting the alternating current output of the H bridge commutation module with the energy storage in the H bridge commutation unit with the energy storage and performing series compensation on the line;
the control system is also connected with the quick bypass switch and is used for protecting the H-bridge converter unit with the energy storage function.
2. A static synchronous series compensator according to claim 1, characterized by: the H bridge converter unit with the energy storage function comprises: the H-bridge converter module with the energy storage function comprises a plurality of H-bridge converter modules with the energy storage function, wherein the H-bridge converter modules with the energy storage function are connected in series, and each H-bridge converter module with the energy storage function comprises: the power supply comprises an H-bridge structure consisting of IGBTs, an energy storage battery, a bypass circuit consisting of thyristors and a direct current capacitor; the input side of an H-bridge structure formed by the IGBTs is respectively connected with the energy storage battery and the direct current capacitor in parallel, and the output side of the H-bridge structure is connected with the bypass circuit in parallel.
3. A static synchronous series compensator according to claim 2, characterized by: the bypass circuit is composed of two thyristors which are connected in series end to end.
4. A static synchronous series compensator according to claim 1, characterized by: the control system adopts TMS320C28335 series floating point DSP controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121153346.7U CN215580380U (en) | 2021-05-27 | 2021-05-27 | Static synchronous series compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121153346.7U CN215580380U (en) | 2021-05-27 | 2021-05-27 | Static synchronous series compensator |
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| Publication Number | Publication Date |
|---|---|
| CN215580380U true CN215580380U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121153346.7U Active CN215580380U (en) | 2021-05-27 | 2021-05-27 | Static synchronous series compensator |
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|---|---|
| CN (1) | CN215580380U (en) |
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2021
- 2021-05-27 CN CN202121153346.7U patent/CN215580380U/en active Active
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