CN217216396U - Single-phase voltage source energy storage power module and capacitor energy storage voltage source converter thereof - Google Patents
Single-phase voltage source energy storage power module and capacitor energy storage voltage source converter thereof Download PDFInfo
- Publication number
- CN217216396U CN217216396U CN202220350616.1U CN202220350616U CN217216396U CN 217216396 U CN217216396 U CN 217216396U CN 202220350616 U CN202220350616 U CN 202220350616U CN 217216396 U CN217216396 U CN 217216396U
- Authority
- CN
- China
- Prior art keywords
- voltage source
- energy storage
- phase
- diode
- alternating current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 69
- 238000004146 energy storage Methods 0.000 title claims abstract description 60
- 239000004065 semiconductor Substances 0.000 claims description 11
- 208000028659 discharge Diseases 0.000 description 17
- 238000001914 filtration Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Images
Classifications
-
- 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]
Landscapes
- Rectifiers (AREA)
Abstract
The utility model belongs to the technical field of electrical automation equipment, a single-phase voltage source energy storage power module and electric capacity energy storage voltage source converter thereof is related to. The three-phase alternating current power supply comprises 3N single-phase voltage source energy storage power modules, three connecting reactors, three alternating current limiting resistors and three bypass switches; the alternating current output ends of the N single-phase voltage source energy storage power modules are connected in series and then connected with a connecting reactor and an alternating current limiting resistor in series to form a phase-change current circuit, one ends of the three-phase current-change circuits are connected with each other to form star connection, the other end of the three-phase current-change circuit serves as the three-phase alternating current output end A, B, C of the three-phase chained voltage source energy storage converter, and the three bypass switches are connected in parallel to the two ends of the three alternating current limiting resistors respectively. The utility model discloses three-phase chain super capacitor energy storage voltage source converter is with low costs than existing transformer boost type super capacitor energy storage voltage source converter, and the loss is low, has guaranteed energy storage super capacitor's safe operation moreover.
Description
Technical Field
The utility model belongs to the technical field of electrical automation equipment, particularly relate to a single-phase voltage source energy storage power module and electric capacity energy storage voltage source converter thereof.
Background
A battery or super capacitor energy storage voltage source converter (hereinafter referred to as PCS) generally adopts a voltage source converter with low alternating voltage (generally less than 800VAC) output to be connected to a medium voltage power grid in a mode of boosting through a transformer. When the mode realizes the energy storage application with large capacity, the access of the transformer brings extra cost and loss, and the mode is not suitable for the energy storage application of large-capacity batteries.
The chain type voltage source converter is usually applied to high-voltage frequency converters and medium-voltage SVG products, and is characterized in that a transformer is omitted, the cost is low, the loss is small, and therefore, the chain type voltage source converter is suitable for energy storage application of large-capacity batteries or super capacitors, and the energy storage batteries or the super capacitors are respectively connected to the direct current side of a power module of the chain type voltage source converter. However, simple access may result in a current flowing to the battery or the super capacitor containing a relatively large ac component, which is detrimental to the safe operation of the super capacitor. There is therefore a need to address the problem of filtering battery or supercapacitor currents. In addition, the initial voltage of the super capacitor is zero, the chain type voltage source converter is directly connected to the power grid and electrified or the super capacitor is subjected to primary discharge, and a proper super capacitor charging circuit is needed on the direct current side of the power module.
Disclosure of Invention
The utility model aims at providing a single-phase voltage source energy storage power module and electric capacity energy storage voltage source converter thereof to overcome prior art not enough, when solving chain voltage source converter and being applied to super capacitor energy storage super capacitor alternating current component current's filtering problem and being incorporated into the power networks and go up the electric super capacitor's during with normal operating charging problem.
The utility model provides a single-phase voltage source energy storage power module, including a single-phase voltage source full-bridge inverter bridge, a direct current filter capacitor, a LC series filter circuit, a discharge filter reactor, a fuse, a controllable semiconductor switch with anti-parallel diode, a discharge diode, a freewheel diode, a charge filter reactor, a charge diode and a set of super capacitor; two alternating current output ends O1/O2 of the single-phase voltage source full-bridge inverter bridge are respectively used as alternating current output ends of the single-phase voltage source energy storage power module, the direct current positive and negative poles of the single-phase voltage source full-bridge inverter bridge are respectively connected to the positive and negative poles of the direct current filter capacitor, the negative pole of the direct current filter capacitor is connected to one end of the fuse, one end of the LC series filter circuit is connected to the positive pole of the direct current filter capacitor, the other end of the LC series filter circuit is connected to the other end of the fuse and the anode of the fly-wheel diode, the positive pole of the direct current filter capacitor is connected to one end of the discharge filter reactor and the collector of the controllable semiconductor switch with the anti-parallel diode, the other end of the discharge filter reactor is connected to the cathode of the discharge diode, and the anode of the discharge diode is connected to the positive pole of the super capacitor and the cathode of the charge diode, the emitter of the controllable semiconductor switch with the anti-parallel diode is connected to the cathode of the fly-wheel diode and one end of the charging filter reactor, the other end of the charging filter reactor is connected to the anode of the charging diode, and the anode of the fly-wheel diode is connected to the cathode of the super capacitor.
The utility model provides a single-phase voltage source energy storage power module and a capacitor energy storage voltage source converter thereof, which comprises 3N single-phase voltage source energy storage power circuits, three connecting reactors, three alternating current limiting resistors and three bypass switches; the alternating current output ends of N single-phase voltage source energy storage power modules in the 3N single-phase voltage source energy storage power modules are connected in series and then connected in series with a connecting reactor and a current limiting resistor to form a phase-change current circuit, one ends of the three-phase current transformation circuits are connected with each other to form star connection, and the other ends of the three-phase current transformation circuits are used as the three-phase alternating current output end A, B, C of the three-phase chain type super-capacitor energy storage voltage source current transformer; the three bypass switches are respectively connected in parallel at two ends of the three alternating current limiting resistors.
The utility model provides a single-phase voltage source energy storage power module and electric capacity energy storage voltage source converter thereof, its advantage:
compare with existing transformer boost type super capacitor energy storage voltage source converter, the utility model discloses a three-phase chain super capacitor energy storage voltage source converter is with low costs, and the loss is low, and super capacitor's the safe operation has been guaranteed to the filtering problem of super capacitor alternating current component when having solved chain voltage source converter and having inserted super capacitor simultaneously and the super capacitor's of being incorporated into the power networks on the electricity and the normal operation charging problem.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is clear that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic circuit diagram of a single-phase voltage source energy storage power module according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a three-phase chain type super capacitor energy storage voltage source converter according to an embodiment of the present invention.
In fig. 1-2, 1 is a bypass switch, 2 is an ac current-limiting resistor, 3 is a connecting reactor, 4 is a phase-change current circuit, 5 is a single-phase voltage source full-bridge inverter bridge, 6 is a dc filter capacitor, 7 is an LC series filter circuit inductor, 8 is an LC series filter circuit capacitor, 9 is a discharge filter reactor, 10 is a fuse, 11 is a controllable semiconductor switch with an anti-parallel diode, 12 is a discharge diode, 13 is a freewheeling diode, 14 is a charge filter reactor, 15 is a charge diode, and 16 is a super capacitor.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, and the embodiments described with reference to the drawings are exemplary and intended to be used for explaining the present invention and should not be construed as limiting the present invention.
Fig. 1 is a schematic circuit diagram of a single-phase voltage source energy storage power module according to an embodiment of the present invention.
As shown in fig. 1, the single-phase voltage source energy storage power module includes a single-phase voltage source full-bridge inverter bridge 5(INV), a dc filter capacitor 6(C0), LC series filter circuits 7 and 8(L1/C1), a discharge filter reactor 9(L2), a fuse 10(FD), a controllable semiconductor switch 11(S1) with an anti-parallel diode, a discharge diode 12(D2), a freewheel diode 13(D1), a charge filter reactor 14(L3), a charge diode 15(D3), and a set of super capacitors 16 (SC); two alternating current output ends O1/O2 of the single-phase voltage source full-bridge inverter bridge 5(INV) are respectively used as alternating current output ends of the single-phase voltage source energy storage power module, the direct current positive and negative poles of the single-phase voltage source full-bridge inverter bridge 5(INV) are respectively connected to the positive and negative poles of the direct current filter capacitor 6(C0), the negative pole of the direct current filter capacitor 6(C0) is connected to one end of the fuse 10(FD), one ends of the LC series filter circuits 7 and 8(L1/C1) are connected to the positive pole of the direct current filter capacitor 6(C0), the other ends of the LC series filter circuits 7 and 8(L1/C1) are connected to the other end of the fuse 10(FD) and the anode of the freewheeling diode 13(D1), and the positive pole of the direct current filter capacitor 6(C0) is connected to one end of the discharge filter reactor 9(L2) and the current collector of the controllable semiconductor switch 11(S1) with the anti-parallel diode And the other end of the discharge filter reactor 9(L2) is connected to the cathode of the discharge diode 12(D2), the anode of the discharge diode 12(D2) is connected to the anode of the super capacitor 16(SC) and the cathode of the charge diode 15(D3), the emitter of the controllable semiconductor switch with anti-parallel diode 11(S1) is connected to the cathode of the flywheel diode 13(D1) and one end of the charge filter reactor 14(L3), the other end of the charge filter reactor 14(L3) is connected to the anode of the charge diode 15(D3), and the anode of the flywheel diode 13(D1) is connected to the cathode of the super capacitor 16 (SC).
Fig. 2 shows a three-phase chain type super capacitor energy storage voltage source converter according to an embodiment of the present invention, which includes 3N single-phase voltage source energy storage power modules 4(PA1-PAN/PB1-PBN/PC1-PCN) shown in fig. 1, three connecting reactors 3(LA/LB/LC), three ac current limiting resistors 2(RA/RB/RC), and three bypass switches 1 (KA/KB/KC); the alternating current output ends of N single-phase voltage source energy storage power modules in the 3N single-phase voltage source energy storage power modules are connected in series and then connected in series with a connecting reactor 3 and a current limiting resistor 2 to form a phase-change current circuit, one ends of the three-phase current-change circuit are connected with each other to form star connection, and the other end of the three-phase current-change circuit is used as the three-phase alternating current output end A, B, C of the three-phase chain type super-capacitor energy storage voltage source converter; three bypass switches 1(KA/KB/KC) are respectively connected in parallel at two ends of three alternating current limiting resistors 2 (RA/RB/RC).
The embodiment of the utility model provides a following detailed introduction the operating principle of three-phase chain super capacitor energy storage voltage source converter:
after the three-phase chained super-capacitor energy storage voltage source converter is connected to a power grid, 3N single-phase voltage source energy storage power module direct current filter capacitors C0 are charged in a current-limiting mode through three alternating current-limiting resistors RA/RB/RC, three bypass switches KA/KB/KC are closed to bypass the three alternating current-limiting resistors RA/RB/RC after charging is finished, then the controller releases pulse locking, and voltages at two ends of a power module direct current filter capacitor C0 run to set values. Thereafter, the controllable semiconductor switch S1 with the antiparallel diode is operated in the PWM mode, and the super capacitor SC is charged to a set value by a circuit including the flywheel diode D1, the charge filter reactor L3, and the charge diode D3. When the chained super capacitor energy storage voltage source converter is controlled to enter a discharging operation state or a normal reactive power compensation state, the active power and the reactive power output to the power grid by the chained super capacitor energy storage voltage source converter can be respectively set, so that the super capacitor can release energy (discharge) to the power grid or compensate reactive power to the power grid. An LC series filtering branch circuit L1/C1 of the single-phase voltage source energy storage power module completes filtering of frequency 2 double-frequency component current of a power grid, a filter reactor L2 completes filtering of single-phase inverter bridge switching frequency alternating current component current, and current flowing into the super capacitor is guaranteed to meet the requirements of technical standards. The fuse FD is used to protect the super capacitor SC and the discharge diode D2 from the short-circuit current. The discharging diode D2 is used for preventing the charging current of the super capacitor SC from directly coming from the direct current side of the single-phase voltage source energy storage power module, and the charging diode D3 is used for preventing the super capacitor from directly discharging through the anti-parallel diode of S1.
The utility model discloses the circuit can be applied to super capacitor energy storage frequency modulation device, also can be applied to in devices such as voltage drop compensator (DVR). The utility model discloses the circuit also can increase the application after other auxiliary circuit warp, and triangle-shaped connection also can be adopted to power module and connection reactor branch road among the three-phase chain super capacitor energy storage voltage source converter, and any is based on the utility model discloses the equivalent transformation circuit that the circuit was done all belongs to the utility model discloses a protection scope.
Claims (2)
1. A single-phase voltage source energy storage power module is characterized by comprising a single-phase voltage source full-bridge inverter bridge, a direct-current filter capacitor, an LC series filter circuit, a discharge filter reactor, a fuse, a controllable semiconductor switch with an anti-parallel diode, a discharge diode, a fly-wheel diode, a charge filter reactor, a charge diode and a group of super capacitors; two alternating current output ends O1/O2 of the single-phase voltage source full-bridge inverter bridge are respectively used as alternating current output ends of the single-phase voltage source energy storage power module, the direct current positive and negative poles of the single-phase voltage source full-bridge inverter bridge are respectively connected to the positive and negative poles of the direct current filter capacitor, the negative pole of the direct current filter capacitor is connected to one end of the fuse, one end of the LC series filter circuit is connected to the positive pole of the direct current filter capacitor, the other end of the LC series filter circuit is connected to the other end of the fuse and the anode of the fly-wheel diode, the positive pole of the direct current filter capacitor is connected to one end of the discharge filter reactor and the collector of the controllable semiconductor switch with the anti-parallel diode, the other end of the discharge filter reactor is connected to the cathode of the discharge diode, and the anode of the discharge diode is connected to the positive pole of the super capacitor and the cathode of the charge diode, the emitter of the controllable semiconductor switch with the anti-parallel diode is connected to the cathode of the fly-wheel diode and one end of the charging filter reactor, the other end of the charging filter reactor is connected to the anode of the charging diode, and the anode of the fly-wheel diode is connected to the cathode of the super capacitor.
2. A capacitor energy storage voltage source converter, characterized by comprising 3N single-phase voltage source energy storage power circuits according to claim 1, three connecting reactors, three ac current limiting resistors and three bypass switches; the alternating current output ends of N single-phase voltage source energy storage power modules in the 3N single-phase voltage source energy storage power modules are connected in series and then connected in series with a connecting reactor and a current limiting resistor to form a phase-change current circuit, one ends of the three-phase current converting circuits are connected with each other to form star connection, and the other ends of the three-phase current converting circuits are used as the three-phase alternating current output end A, B, C of the three-phase chain type super-capacitor energy storage voltage source converter; the three bypass switches are respectively connected in parallel at two ends of the three alternating current limiting resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220350616.1U CN217216396U (en) | 2022-02-21 | 2022-02-21 | Single-phase voltage source energy storage power module and capacitor energy storage voltage source converter thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220350616.1U CN217216396U (en) | 2022-02-21 | 2022-02-21 | Single-phase voltage source energy storage power module and capacitor energy storage voltage source converter thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217216396U true CN217216396U (en) | 2022-08-16 |
Family
ID=82798547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220350616.1U Active CN217216396U (en) | 2022-02-21 | 2022-02-21 | Single-phase voltage source energy storage power module and capacitor energy storage voltage source converter thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217216396U (en) |
-
2022
- 2022-02-21 CN CN202220350616.1U patent/CN217216396U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103441691B (en) | A kind of mode of resonance electronic power convertor and converter device | |
| CN109256951B (en) | Direct-current voltage conversion device and control method thereof | |
| CN104410260A (en) | Fault-tolerance-capability-equipped MMC sub-module structure capable of realizing DC fault self-protection, and MMC modulation method thereof | |
| CN102983568A (en) | Modular multilevel converter high voltage direct current (MMC-HVDC) converter station starting method used for power network black start | |
| CN103051167A (en) | MMC-based (modular multilevel converter-based) UPQC (unified power quality conditioner) charge-starting method | |
| CN102916435B (en) | A kind of battery energy storage power conversion system containing Z source network and control method thereof | |
| CN104269875A (en) | Hybrid energy storage topological structure on basis of MMC modular multilevel converter | |
| Guo et al. | Energy storable VSC-HVDC system based on modular multilevel converter | |
| Chen et al. | A modular and reconfigurable battery system | |
| Tan et al. | A bipolar-DC-bus EV fast charging station with intrinsic DC-bus voltages equalization and minimized voltage ripples | |
| CN115663864A (en) | High-voltage direct-current cascade energy storage system and control protection method thereof | |
| Burlaka et al. | Bidirectional single stage isolated DC-AC converter | |
| EP3916975A2 (en) | Conversion device | |
| CN204391751U (en) | A kind of three-phase and four-line parallel connection type dynamic voltage compensator | |
| CN210405078U (en) | Three-phase multiple power frequency isolation type photovoltaic grid-connected inverter | |
| CN217216396U (en) | Single-phase voltage source energy storage power module and capacitor energy storage voltage source converter thereof | |
| CN116232037A (en) | Method and system for starting power electronic converter | |
| EP3916980A1 (en) | Conversion device | |
| CN201766494U (en) | Bypass circuit of chain link in high-voltage chained static synchronization compensator | |
| CN110690723B (en) | Control method of energy storage type modular multilevel converter in offshore wind power system | |
| CN205105115U (en) | Many level of modularization transverter and transverter module | |
| CN212137555U (en) | MMHC energy storage converter | |
| CN217882862U (en) | Three-phase chain battery energy storage voltage source converter | |
| Niu et al. | Cascaded packed U-cell STATCOM with low capacitance and its third harmonic control | |
| CN218526102U (en) | Three-phase multi-level battery energy storage converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240918 Address after: 214000 Gaolang East Road, Huazhuang Street, Wuxi Economic Development Zone, Wuxi City, Jiangsu Province, China 999-8-B1-610 Patentee after: Wuxi Zhiyuan Guosheng Electric Co.,Ltd. Country or region after: China Address before: Room 310, 3rd Floor, Building 5, Yard 1, Nongda South Road, Haidian District, Beijing 100085 Patentee before: BEIJING SINEWELL CONVERTER TECHNOLOGY CO.,LTD. Country or region before: China |