CN207010555U - The unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit of full-controlled device - Google Patents
The unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit of full-controlled device Download PDFInfo
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- CN207010555U CN207010555U CN201720916947.6U CN201720916947U CN207010555U CN 207010555 U CN207010555 U CN 207010555U CN 201720916947 U CN201720916947 U CN 201720916947U CN 207010555 U CN207010555 U CN 207010555U
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Abstract
The utility model discloses a kind of unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit of full-controlled device, it includes power cell, and the power cell is connected in parallel, and power cell input passes through filter inductance and station change connection；Power cell output end is connected with high-frequency step-up transformer input, high-frequency step-up transformer output termination icing circuit；The utility model solves prior art and uses DC ice melting and exchange ice-melt, it may be used on 500kV and the transmission line of electricity of following each voltage class, but these deicing modes are required for carrying out ice-melt in the case where circuit stops transmission of electricity, and the technical problems such as huge loss of outage will be caused for extra high voltage network.
Description
Technical field
The utility model belongs to transmission line de-icing technology；A kind of more particularly to high-power height of unit cascaded type of full-controlled device
Frequency high pressure ice-melt excitation power supply circuit.
Background technology
Powerline ice-covering can cause electric power facility to damage when serious, endanger the safe operation of power system, therefore transmit electricity
The research of circuit clearing ice technology has obtained the attention of domestic and foreign scholars very early.Mainly removing for being used at present in power system is freezing cold
Section has thermal ice-melting, mechanical deicing and deiced naturally, wherein what is be most widely used in Practical Project is thermal ice-melting method,
It includes DC ice melting and exchanges ice-melt, may be used on 500kV and the transmission line of electricity of following each voltage class, but this
A little deicing modes are required for carrying out ice-melt in the case where circuit stops transmission of electricity, will be caused for extra high voltage network huge
Loss of outage.Therefore exploring the new removing ice of power transmission line technology that may be implemented in wire type becomes the anti-icing disaster reduction research of power system
One of important topic.
Utility model content：
The technical problems to be solved in the utility model：A kind of unit cascaded type high-power high-frequency high-voltage of full-controlled device is provided to melt
Ice excitation power supply circuit, to solve prior art using DC ice melting and ice-melt is exchanged, it may be used on 500kV and following each
On the transmission line of electricity of voltage class, but these deicing modes are required for carrying out ice-melt in the case where circuit stops transmission of electricity, right
The technical problems such as huge loss of outage will be caused in extra high voltage network.
Technical solutions of the utility model：
A kind of unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit of full-controlled device, it includes power cell,
The power cell is connected in parallel, and power cell input passes through filter inductance and station change connection；Power cell output end with
High-frequency step-up transformer input connects, high-frequency step-up transformer output termination icing circuit.
High-frequency step-up transformer input is in series with inductance Lr, high-frequency step-up transformer output end is parallel with electric capacity Cp。
The power cell includes PWM controlled rectification circuits, and PWM controlled rectification circuits connect with inversion output unit circuit
Connect, inversion output unit circuit is connected with lc circuit, lc circuit output end output low-voltage high-frequency alternating current.PWM controlled rectifications electricity
Road includes four igbt Sa1~Sa4；Igbt Sa1~Sa2Series connection, insulated gate bipolar transistor
Pipe Sa3~Sa4Series connection.
Inversion output unit circuit is the H bridge inverters that IGBT is formed.
Electric capacity C1And C2It is in parallel with inversion output unit circuit input end after series connection；Resistance R1With electric capacity C1Parallel connection, resistance R2
With electric capacity C2It is in parallel.
The beneficial effects of the utility model：
The utility model improves output current and frequency using power cell Parallel opertation, and high-frequency step-up transformer improves defeated
Go out voltage, meet the requirement such as deicing device high pressure, high-power and frequency continuously adjustabe；In view of the humorous of ice-melt driving source input side
Ripple problem and control performance, employ igbt (Insulated Gate Bipolar Transistor,
IGBT) device carries out multiple rectifying to reach unit power factor rectifier and improve net as power cell prime rectifying device
The purpose of the side quality of power supply, at the same also solve inputted using phase-shifting transformer after carry out the multiple rectifying of uncontrollable rectification again
Device volume that mode is brought is big, operation easily heating and it is less economical the problem of.Power cell inverter is controlled using SPWM ripples
Output high voltage, boosted by high frequency transformer, realize the high-power output function of high-frequency and high-voltage；
The utility model solves prior art using DC ice melting and ice-melt is exchanged, and may be used on 500kV and following
On the transmission line of electricity of each voltage class, but these deicing modes are required for being melted in the case where circuit stops transmission of electricity
Ice, the technical problems such as huge loss of outage will be caused for extra high voltage network.
Brief description of the drawings：
Fig. 1 is the utility model topological circuit structural representation；
Fig. 2 is the utility model power cell topological circuit structural representation.
Embodiment：
A kind of unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit (see Fig. 1) of full-controlled device, it includes work(
Rate unit, the power cell are connected in parallel, and power cell input passes through filter inductance and station change connection；Power cell is defeated
Go out end to be connected with high-frequency step-up transformer input, high-frequency step-up transformer output termination icing circuit.
The inductance L of high-frequency step-up transformer series connectionr=55mH, shunt capacitance CP=0.5 μ F, inversion is set to be in quasi-resonance shape
State, it can effectively reduce the switching loss of high frequency band.
The power cell includes PWM controlled rectification circuits (see Fig. 2), PWM controlled rectification circuits and inversion output unit
Circuit is connected, and inversion output unit circuit is connected with lc circuit, lc circuit output end output low-voltage high-frequency alternating current.Lc circuit
Including inductance Lf, electric capacity Cf.By choosing suitable filtering parameter, effectively inhibit the undue fluctuation of output current and need to filter
The higher hamonic wave removed, and the running status of inverter can be improved.
PWM controlled rectification circuits include four igbt Sa1~Sa4；Igbt Sa1~Sa2
Series connection, igbt Sa3~Sa4Series connection.
RsAnd LsRespectively AC equivalent resistance and inductance, wherein LsFiltered including input station with equivalent inductance and input is become
Ripple inductance.F1For fuse, its effect is prevented under whole deicing device software protection failure situation, side of cutting off the electricity supply in time,
From driving source by permanent damage.
Inversion output unit circuit is the H bridge inverters that IGBT is formed.
Electric capacity C1And C2Series connection reduces output DC pulse, its value is taken as rectifier output DC filter capacitor
0.1mF.Because capacitor has leakage current, to prevent that it is inconsistent, it is necessary to install additional that leakage current from making electric capacity both end voltage bear voltage
Capacitor balance resistance, to reach both ends of filter capacitor, to bear voltage consistent, while electric capacity electric discharge can be given to provide passage, balance electricity
Hinder R1And R2Value is 1.3k Ω.
The utility model input becomes single-phase 6kV for station, as the exchange input in parallel of N number of power cell, power cell
Rectification stage uses the basic control mode of unity power factor PWM rectifications, in the multiple rectifying side without using phase-shifting transformer
Under formula, the control effect of input side harmonic wave is realized, while also makes the economy of complete machine and fixing fabric structure aspect obtain well carrying
Rise.Stable direct current is obtained from rectification stage, 40kHz high-frequency acs are exported by each inverter by SVPWM modulation techniques.Together
When, each power cell parallel connection re-forms low-voltage high-power output, this Parallel opertation structure, is not increasing the feelings of shunting device
Under condition, solve the problems, such as that some power cell is stopped and influences whole device output performance very well.Finally pass through high frequency
Step-up transformer, form the output of 18kV/40kHz high-frequency and high-voltages and reach effective ice-melt effect.
Claims (6)
1. a kind of unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit of full-controlled device, it includes power cell, its
It is characterised by：The power cell is connected in parallel, and power cell input passes through filter inductance and station change connection；Power cell
Output end is connected with high-frequency step-up transformer input, high-frequency step-up transformer output termination icing circuit.
A kind of 2. unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply electricity of full-controlled device according to claim 1
Road, it is characterised in that：High-frequency step-up transformer input is in series with inductance Lr, high-frequency step-up transformer output end is parallel with electric capacity
Cp；Inductance Lr=55mH, shunt capacitance CP=0.5 μ F.
A kind of 3. unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply electricity of full-controlled device according to claim 1
Road, it is characterised in that：The power cell includes PWM controlled rectification circuits, PWM controlled rectification circuits and inversion output unit electricity
Road is connected, and inversion output unit circuit is connected with lc circuit, lc circuit output end output low-voltage high-frequency alternating current.
A kind of 4. unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply electricity of full-controlled device according to claim 3
Road, it is characterised in that：PWM controlled rectification circuits include four igbt Sa1~Sa4；Igbt
Sa1~Sa2Series connection, igbt Sa3~Sa4Series connection.
A kind of 5. unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply electricity of full-controlled device according to claim 3
Road, it is characterised in that：Inversion output unit circuit is the H bridge inverters that IGBT is formed.
A kind of 6. unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply electricity of full-controlled device according to claim 3
Road, it is characterised in that：Electric capacity C1And C2It is in parallel with inversion output unit circuit input end after series connection；Resistance R1With electric capacity C1Parallel connection,
Resistance R2With electric capacity C2It is in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916947.6U CN207010555U (en) | 2017-07-26 | 2017-07-26 | The unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit of full-controlled device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916947.6U CN207010555U (en) | 2017-07-26 | 2017-07-26 | The unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit of full-controlled device |
Publications (1)
| Publication Number | Publication Date |
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| CN207010555U true CN207010555U (en) | 2018-02-13 |
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ID=61456415
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720916947.6U Active CN207010555U (en) | 2017-07-26 | 2017-07-26 | The unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit of full-controlled device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395028A (en) * | 2017-07-26 | 2017-11-24 | 贵州电网有限责任公司电力科学研究院 | The unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit of full-controlled device |
| CN113451974A (en) * | 2021-08-09 | 2021-09-28 | 河南卫华重型机械股份有限公司 | Modular trolley line alternating-current ice melting controller |
| CN113451973A (en) * | 2021-08-09 | 2021-09-28 | 河南卫华重型机械股份有限公司 | Integrated trolley line alternating-current ice melting controller |
-
2017
- 2017-07-26 CN CN201720916947.6U patent/CN207010555U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395028A (en) * | 2017-07-26 | 2017-11-24 | 贵州电网有限责任公司电力科学研究院 | The unit cascaded type high-power high-frequency high-voltage ice-melt excitation power supply circuit of full-controlled device |
| CN113451974A (en) * | 2021-08-09 | 2021-09-28 | 河南卫华重型机械股份有限公司 | Modular trolley line alternating-current ice melting controller |
| CN113451973A (en) * | 2021-08-09 | 2021-09-28 | 河南卫华重型机械股份有限公司 | Integrated trolley line alternating-current ice melting controller |
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