CN212183138U - Low pressure passes through device based on novel crowbar - Google Patents
Low pressure passes through device based on novel crowbar Download PDFInfo
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- CN212183138U CN212183138U CN202020973453.3U CN202020973453U CN212183138U CN 212183138 U CN212183138 U CN 212183138U CN 202020973453 U CN202020973453 U CN 202020973453U CN 212183138 U CN212183138 U CN 212183138U
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The utility model relates to a low pressure passes through device based on novel crowbar mainly includes double-fed induction machine, novel crowbar circuit, rotor side converter, net side converter, direct current side and super capacitor, transformer, direct current bus-bar capacitance, detection module and control module. The device is used for grid voltage drop when the double-fed wind power generation is carried out, and the condition that the fan does not break off the grid operation is ensured. When the voltage of a power grid drops, the novel crowbar circuit is put into use, so that the uncontrollable time of the rotor side converter is reduced, meanwhile, the direct current side uses the super capacitor energy storage circuit to store the excess energy, and the energy is released until the fault is removed, so that the loss is reduced, and the device is prevented from being damaged by the overvoltage of the direct current side. When the cooperative control re-power grid fails, overvoltage and overcurrent protection can be better realized, and low-voltage ride through is realized.
Description
The technical field is as follows:
the invention belongs to the technical field of wind power generation, and particularly relates to a low-voltage ride-through control device based on a novel crowbar.
Technical background:
energy is an important material basis for human survival and development, along with rapid development of economy, human consumption of energy is increased year by year, conventional energy faces the dilemma of increasing exhaustion, and full development and utilization of cleanable energy are two choices for solving the energy problem. Wind energy is used as a new energy source, has the characteristics of inexhaustibility, no pollution and reproducibility, so that wind power generation becomes the most mature, largest-scale-developed and best-commercialized-developed power generation mode in the current new energy power generation technology, and is generally regarded by all countries in the world. A common doubly-fed wind generator in a wind power system cannot effectively isolate the connection with a power grid because a stator and a rotor of the doubly-fed wind generator are directly connected with the power grid, and the doubly-fed wind generator is very sensitive to the fault of the power grid. Under the condition of a fault, the low-voltage ride through capability of the doubly-fed wind turbine generator is weaker due to the fact that the capacities of the rotor-side converter and the grid-side converter are smaller. In order to ensure the operation safety of a power grid, a wind turbine generator is required to have certain low-voltage ride-through capability.
Because wind power generation mostly adopts a double-fed generator, a stator and a rotor are connected with a power grid, and when grid connection fails, voltages at two ends of the stator drop to cause overvoltage and overcurrent at two ends of the rotor, so that equipment is damaged. A novel crowbar protection circuit is added on the side of the rotor to protect the rotor from overvoltage and overcurrent. A super capacitor energy storage circuit is adopted on the direct current side, when overvoltage occurs, the device is protected, redundant energy is stored, and after the fault is removed, the energy is released to reduce loss.
The utility model has the following contents:
in order to solve the prior technical problem, the utility model aims at providing a can be when the electric wire netting breaks down, can better realize overvoltage and overcurrent protection, realize that the fan does not take off the device of net operation a period, realize that the low pressure passes through the technique.
In order to achieve the above object, the present invention provides a method for manufacturing a semiconductor device, comprising:
the utility model provides a low pressure passes through controlling means based on novel crowbar, includes double-fed induction motor, three-phase electric wire netting, novel crowbar protection circuit, rotor side converter, net side converter, direct current side and super capacitor, transformer, direct current bus capacitance, detection module and main control module, and wherein, detection module includes electric wire netting voltage electricity detection module, electric wire netting current detection module and direct current voltage detection module. Novel crowbar protection circuit connects double-fed induction machine, rotor side converter and main control module, rotor side converter connect double-fed induction machine rotor, novel crowbar protection circuit, direct current side and main control module, net side converter connect transformer, direct current side and main control module, the transformer connect electric wire netting and net side converter, the electric wire netting connect electric wire netting voltage detection module and electric wire netting current detection module, transformer, electric wire netting voltage current detection module, direct current voltage detection module be connected to main control module, main control module's output is connected to novel crowbar protection circuit, rotor side converter, net side converter.
Preferably, the novel crowbar protection circuit adopts an active crowbar circuit and a dynamic resistor connected in parallel, each phase is formed by connecting two diodes, and the whole novel crowbar circuit comprises 6 diodes, an IGBT, an unloading resistor and a dynamic resistor RPDRThe rotor side converter is used for short-circuiting the rotor side converter when the voltage of a power grid drops, and the rotor side converter is disconnected from the doubly-fed induction motor to protect devices and realize low-voltage ride through.
Preferably, the direct current side is connected with the direct current capacitor by adopting a super capacitor energy storage circuit, and is used for storing the energy surplus when the voltage of the power grid drops, releasing the stored energy after the fault is removed to reduce the loss and protect the direct current side device.
Preferably, all the switching devices of the rotor-side converter and the grid-side converter are IGBTs with the model number of CM200DY-34A, the diodes in the novel crowbar protection circuit are diodes with the model number of 1N4005, and the switching devices are IGBTs with the model number of CM200 DY-34A.
Preferably, the detection module comprises a power grid voltage detection module, a power grid current detection module and a direct current voltage detection module, and the control module comprises a driving circuit and a DSP controller; the power grid current detection module adopts a CHB-25NP current Hall sensor; the power grid voltage detection conditioning module and the direct current voltage detection module both adopt CHB-25NP voltage Hall sensors; the driving circuit adopts an IR2110 driving chip produced by American IR company; the DSP adopts TMS320F28335 produced by TI company as a main control chip.
Compared with the prior art, the beneficial effects of the utility model are that:
when a traditional crowbar circuit is put into use, the doubly-fed induction motor loses the control function, operates in a squirrel-cage motor mode, absorbs inductive reactive power from a power grid, aggravates the voltage drop of the power grid, and is not beneficial to the recovery of the power grid. Traditional crowbar circuit adopts a fixed resistance, hardly compromises the suppression to rotor current and direct current bus voltage and to the control that the crowbar drops into duration, and the fine solution this problem of novel crowbar protection circuit. When the voltage of the power grid drops to be overlarge, the novel crowbar protection circuit is connected, and the rotor side converter is short-circuited, so that the rotor side converter is protected, and the uncontrollable time of the rotor side converter is shortened. The super capacitor energy storage circuit stores the excessive energy in the fault to prevent the overvoltage overcurrent from damaging the device, and releases the energy after the fault is cut off to reduce the loss. The novel crowbar protection circuit and the super capacitor energy storage circuit are used in the double-fed wind power generation technology, and guarantee is provided for the stability and the low-voltage ride-through capability of the double-fed wind power generation, so that the double-fed wind power generation set can better realize overvoltage and overcurrent protection when a fault occurs. Therefore, when the fan generates power at high power and the power grid has serious faults, the novel crowbar circuit is put into use, the motor can be effectively protected, and the function of low-voltage ride through is better realized.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a system control diagram of the present invention.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to fig. 2: the system comprises a three-phase power grid (1), a power grid voltage detection module (2), a power grid current detection module (3), a direct current voltage detection module (12), a grid side drive circuit (10), a rotor side drive circuit (11), a grid side transformer (9), a rotor side converter (6), a grid side converter (5), a double-fed induction motor (8), a direct current side (4), a novel crowbar protection circuit (7) and a main control module (13), wherein the novel crowbar protection circuit is connected with the double-fed induction motor and the rotor side converter, the output end of the rotor side converter is connected with the double-fed induction motor and the novel crowbar protection circuit, the grid side converter is connected with a transformer and the direct current side, the transformer is connected with the three-phase power grid, the power grid current detection module in the detection module detects the three-phase power grid current, and the power grid voltage detection module detects the three-phase power grid voltage, The direct-current voltage detection module detects direct-current voltage, and on-off of the novel crowbar protection circuit, the rotor side converter and a power grid side converter switching device is controlled through the rotor side driving circuit and the power grid side driving circuit, so that the wind turbine does not fall off the power grid when the power grid voltage drops in the wind power plant, and low-voltage ride-through is realized.
Comply with the utility model discloses a scheme, a low pressure based on novel pinch bar of this embodiment passes through device specifically includes: the system comprises a three-phase power grid (1), a power grid voltage detection module (2), a power grid current detection module (3), a direct current voltage detection module (12), a grid side driving circuit (10), a rotor side driving circuit (11), a grid side transformer (9), a rotor side converter (6), a grid side converter (5), a double-fed induction motor (8), a direct current side (4), a novel crowbar protection circuit (7) and a main control module (13).
Wherein: the novel crowbar protection circuit (7) is connected with the double-fed induction motor (8) and the rotor side converter (6), the rotor side converter (6) is connected with the double-fed induction motor (8) and the novel crowbar circuit (7), the rotor side converter (6) is connected with the direct current side (4), the grid side converter (5) is connected with the direct current side (4) and the grid side transformer (9); and the grid-side transformer (9) is connected with the three-phase power grid (1) and the grid-side converter (5). Detecting the current of the power grid by using a power grid current detection module (3), and sending all detected current signals to a DSP (digital signal processor) controller (13); the voltage of a direct current side (4) is detected by using a direct current voltage detection module (12), the voltage of a power grid is detected by using a power grid voltage detection module (2), and then a detected voltage signal is sent to a DSP (digital signal processor) controller (13); the signal of sending into DSP controller (13) is handled inside the controller, and the output needs command signal, receives IR2110 net side drive circuit (10), rotor side drive circuit (11) again, converts to its break-make of drive signal control of novel crowbar protection circuit (7), rotor side converter (6), net side converter (5) switching element, realizes the utility model relates to a current-voltage double closed loop feedback control based on novel crowbar's low pressure ride through device.
Claims (5)
1. A low-voltage ride-through device based on a novel crowbar is characterized by comprising a three-phase power grid (1), a power grid voltage detection module (2), a power grid current detection module (3), a direct-current voltage detection module (12), a grid side driving circuit (10), a rotor side driving circuit (11), a grid side transformer (9), a rotor side converter (6), a grid side converter (5), a double-fed induction motor (8), a direct-current side (4), a novel crowbar protection circuit (7) and a main control module (13), wherein the detection module comprises the power grid voltage detection module (2), the power grid current detection module (3) and the direct-current voltage detection module (12), the driving circuit comprises the rotor side driving circuit (11) and the grid side driving circuit (10), the novel crowbar protection circuit (7) is directly connected with the double-fed induction motor (8) and the rotor side converter (6), the rotor side converter (6) is connected with a double-fed induction motor (8), a novel crowbar protection circuit (7) and a direct current side (4), the grid side converter (5) is connected with the direct current side (4) and a grid side transformer (9), the direct current side (4) is connected with the rotor side converter (6) and the grid side converter (5), the grid side transformer (9) is connected with a three-phase power grid (1) and the grid side converter (5), the three-phase power grid (1) is connected with a power grid voltage detection module (2), a power grid current detection module (3) and a grid side transformer (9), the output ends of the power grid voltage detection module (2), the power grid current detection module (3) and the direct current voltage detection module (12) are connected to a main control module (13), and the output end of the main control module (13) is connected with the novel crowbar protection circuit (7), the switching elements of the rotor-side converter (6) and the grid-side converter (5) are driven by a rotor-side drive circuit (11) and a grid-side drive circuit (10).
2. The method of claim 1The utility model provides a low pressure passes through device based on novel crowbar which characterized in that: the novel crowbar protection circuit adopts an active crowbar circuit parallel dynamic resistor, each phase is formed by connecting two diodes, and the whole novel crowbar circuit comprises 6 diodes, an IGBT (insulated gate bipolar transistor), an unloading resistor and a dynamic resistor RPDRThe rotor side converter is used for short-circuiting the rotor side converter when the voltage of a power grid drops, and the rotor side converter is disconnected from the doubly-fed induction motor to protect devices and realize low-voltage ride through.
3. The low-voltage ride-through device based on the novel crowbar according to claim 1, is characterized in that: and the direct current side is connected with the direct current capacitor by adopting a super capacitor energy storage circuit and is used for storing the energy surplus when the voltage of the power grid drops, releasing the stored energy after the fault is removed to reduce the loss and protecting devices on the direct current side.
4. The low-voltage ride-through device based on the novel crowbar according to claim 1, is characterized in that: all switching devices of the rotor side converter and the network side converter select IGBTs with models of CM200DY-34A, diodes in the novel crowbar circuit select diodes with models of 1N4005, and the switching devices select IGBTs with models of CM200 DY-34A.
5. The low-voltage ride-through device based on the novel crowbar according to claim 1, is characterized in that: the detection module comprises a power grid voltage detection module, a power grid current detection module and a direct current voltage detection module, and the control module comprises a driving circuit and a DSP controller; the power grid current detection module adopts a CHB-25NP current Hall sensor; the power grid voltage detection conditioning module and the direct current voltage detection module both adopt CHB-25NP voltage Hall sensors; the driving circuit adopts an IR2110 driving chip produced by American IR company; the DSP adopts TMS320F28335 produced by TI company as a main control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020973453.3U CN212183138U (en) | 2020-06-01 | 2020-06-01 | Low pressure passes through device based on novel crowbar |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020973453.3U CN212183138U (en) | 2020-06-01 | 2020-06-01 | Low pressure passes through device based on novel crowbar |
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| CN212183138U true CN212183138U (en) | 2020-12-18 |
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| CN202020973453.3U Expired - Fee Related CN212183138U (en) | 2020-06-01 | 2020-06-01 | Low pressure passes through device based on novel crowbar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117081155A (en) * | 2023-08-24 | 2023-11-17 | 山东大学 | Grid-connected wind power generation low-voltage ride through method and system based on super capacitor |
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2020
- 2020-06-01 CN CN202020973453.3U patent/CN212183138U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117081155A (en) * | 2023-08-24 | 2023-11-17 | 山东大学 | Grid-connected wind power generation low-voltage ride through method and system based on super capacitor |
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Granted publication date: 20201218 Termination date: 20210601 |