CN101562353B - On-line mutual switching control device of fundamental frequency power supply and variable frequency power supply - Google Patents
On-line mutual switching control device of fundamental frequency power supply and variable frequency power supply Download PDFInfo
- Publication number
- CN101562353B CN101562353B CN2009100148864A CN200910014886A CN101562353B CN 101562353 B CN101562353 B CN 101562353B CN 2009100148864 A CN2009100148864 A CN 2009100148864A CN 200910014886 A CN200910014886 A CN 200910014886A CN 101562353 B CN101562353 B CN 101562353B
- Authority
- CN
- China
- Prior art keywords
- frequency
- power supply
- output
- power
- variable frequency
- 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
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The invention discloses a mutual switching device of power supply, in particular to an on-line mutual switching control device of a fundamental frequency power supply and a variable frequency power supply, comprising a variable frequency output contactor KM2, a variable frequency output reactor L, a fundamental frequency output contactor KM1, a control processor and a variable frequency power supply. Under the control of the control processor and in the process of mutual switching of the variable frequency power supply and the fundamental frequency power supply, the variable frequency power supply and the fundamental frequency power supply are maintained and a load has common network moment, meanwhile, a mutual switching process of the variable frequency power supply output from a voltage source to a current source exists in the middle, therefore, no current surge among the variable frequency voltage, the fundamental frequency voltage and the load exists in the switching process and the reliability of the entire system is ensured.
Description
Technical field
The present invention relates to the mutual switching device shifter of a kind of power supply, especially relate to the online mutual switching control device of a kind of power frequency supply and variable frequency power supply.
Background technology
At present, two kinds of off-line switching and online switchings are arranged in the mode of switching between power frequency supply and the variable frequency power supply.Off-line switches the main mode that adopts " cut afterwards earlier and throw ", promptly cut off the output of variable frequency power supply earlier, again power frequency supply is thrown and gone up dragging motor, the motor that this kind mode can not drag power frequency switches to variable frequency power supply and drags, in the middle of during switching Dead Time must be set, be unidirectional switching, can not two-way mutual switching, simultaneously power frequency supply, variable frequency power supply, motor are all existed greater impact and influence.The mode of " throw afterwards earlier and cut " is mainly adopted in online switching, after soon variable frequency power supply and power frequency supply are connected on the same network jointly, cuts off any one power supply wherein again, reaches the purpose of two-way switching.In the mode of present " throw afterwards earlier and cut ", mainly be by detecting four fundamentals of frequency, phase place, voltage magnitude, phase sequence of power frequency supply, adjust then the frequency conversion output voltage strict with power frequency supply with frequency, homophase, the same width of cloth, with finishing online switching after the preface, but, detect the back adjust frequency conversion output want strict and power frequency supply with frequency, homophase, with the width of cloth very difficulty finish, there is certain error will produce bigger impulse current, power frequency supply, variable frequency power supply or electrical machinery life are had bigger shortcomings such as influence.
Summary of the invention
For overcoming above deficiency, reduce power frequency supply and the online mutual switching control device of variable frequency power supply when the invention provides the online mutual switching of a kind of power frequency supply and variable frequency power supply to the infringement of power frequency supply, variable frequency power supply and motor.
In order to solve the problems of the technologies described above, the present invention is achieved by the following measures:
The online mutual switching control device of a kind of power frequency supply and variable frequency power supply comprises frequency conversion output contactor KM2, power frequency output contactor KM1, processor controls 2, variable frequency power supply 1;
The power input of variable frequency power supply 1 connects the power output end of power frequency supply, and the output of variable frequency power supply is the Series Frequency Conversion out put reactor successively
KM2 arrives load with the output contactor, and power frequency output contactor KM1 is connected between the power output end and load of power frequency supply;
Described processor controls 2, its input connects described power frequency output contactor KM1, the contacts status signal output part of frequency conversion output contactor KM2 and the collection voltage and current signal output of described variable frequency power supply 1 respectively, when variable frequency power supply 1 switches to power frequency supply, it is used for that input signal is processed into the output phase of control of conversion power supply 1 and the phase place of input line voltage is approached and exported as current source, then closed power frequency side contactor KM1 disconnects control signal and the output of frequency conversion output contactor KM2 then; When power frequency supply switches to variable frequency power supply 1, it is used for that input signal is processed into the output phase of control of conversion power supply 1 and the phase place of input line voltage is approached and exported as the current source mode, then closed frequency conversion output contactor KM2, instantaneous variable frequency power supply 1 is carried out current source output by its rated current, cut off power frequency side contactor KM1 then, last control of conversion power supply 1 is pressed the control signal and the output of voltage source output; Its control signal output ends connects described power frequency output contactor KM1, the contact signal input of frequency conversion output contactor KM2 and the signal input end of described variable frequency power supply 1 respectively.
A kind of power frequency supply of the present invention and the online mutual switching control device of variable frequency power supply, described processor controls 2 is a microprocessor.
The invention has the beneficial effects as follows: simple to operate, reduce the generation of error, improved the reliability of power frequency supply and the online switching of variable frequency power supply, reduced simultaneously power frequency supply, variable frequency power supply, the impact of motor has prolonged their useful life.
Description of drawings
Fig. 1 is a block diagram of the present invention.
1 variable frequency power supply among the figure, 2 processor controls, 3 power frequency supplies, 4 loads.
Embodiment
The present invention includes power frequency supply side contactor KM1 as Fig. 1, variable frequency power supply 1, variable frequency power supply out put reactor L, variable frequency power supply output contactor KM2, processor controls 2 five parts are formed, the input of variable frequency power supply 1 directly links to each other with power frequency supply 3 in the corresponding device, the output of variable frequency power supply 1 links to each other with the end of variable frequency power supply out put reactor L, suitable for reading the linking to each other of the other end of variable frequency power supply out put reactor L and variable frequency power supply output contactor KM2, the end opening of variable frequency power supply output contactor directly links to each other with load, the suitable for reading of power frequency supply side contactor KM1 directly links to each other with common frequency power network, and the end opening of power frequency supply side contactor KM1 directly links to each other with load.
There is the voltage signal of the power frequency supply 3 that collects its input side to deliver in the processor controls 2 in the corresponding device in the variable frequency power supply 1, the load current signal that collects its outlet side is simultaneously delivered in the processor controls 2, processor controls 2 is handled the directly operate as normal of control of conversion power supply 1 of back by signal controlling, signal after processor controls 2 will be handled is simultaneously sent the break-make of control of conversion power supply output contactor KM2, and the break-make of sending control power frequency supply side contactor KM1.
After processor controls 2 receives voltage that variable frequency power supply collects, current signal in the corresponding device, calculate the frequency and the phase place of power frequency supply in real time, and the amplitude of power frequency supply 3 voltages, processor controls 2 is adjusted the output of variable frequency power supply 1 in real time by power frequency supply 3 frequencies, phase place, the amplitude calculated, the frequency, phase place, the amplitude that make output frequency, phase place, the amplitude of variable frequency power supply 1 approach power frequency supply 3.
When the following time of situation that requires variable frequency power supply 1 is switched to power frequency supply; device operating state this moment is that power frequency supply side contactor KM1 disconnects; disconnect with load; variable frequency power supply output contactor KM2 connects; be communicated with load; variable frequency power supply 1 is worked by the normal voltage source way of output under processor controls 2 controls; the output of adjusting variable frequency power supply 1 by processor controls 2 when switching approaches power frequency supply 3; make the working method output of variable frequency power supply 1 by voltage source; at this moment; processor controls 2 is controlled by the variable frequency power supply output current that receives in control; allow variable frequency power supply 1 output switch to current source output; controlling power frequency side contactor KM1 then connects; this moment power frequency supply 3; the output of variable frequency power supply 1; the load common network; promptly throw power frequency side contactor KM1 earlier; connecting the back at the power frequency side contactor disconnects at the output contactor KM2 with variable frequency power supply 1; promptly shear frequency power in back is exported contactor KM2; press the output of the voltage source way of output by processor controls 2 control of conversion power supplys 1 more at last; at this moment; the whole process that switches to power frequency supply 3 by variable frequency power supply 1 is finished, and variable frequency power supply 1 can be in no-load running or stopped status.
When requiring that power frequency supply 3 switched to variable frequency power supply 1 work, device operating state this moment is that power frequency supply side contactor KM1 connects, be communicated with load, variable frequency power supply output contactor KM2 disconnects, disconnect with load, variable frequency power supply 1 is in holding state under the control of processor controls 2, in the time of power frequency supply 3 will being switched to variable frequency power supply 1 work, start variable frequency power supply work down by processor controls 2 controls, and adjust variable frequency power supply 1 and export the frequency of approaching power frequency supply 3, phase place is exported by the voltage source mode, connect the contactor KM2 of variable frequency power supply output this moment, connecting KM2 moment, processor controls 2 control of conversion power supplys 1 carry out current source output by the rated current of variable frequency power supply 1, cut off power frequency side contactor KM1 then, after power frequency side contactor KM1 disconnects again by processor controls 2 control of conversion power supplys 1 by normal voltage source output services, at this moment, the whole process that switches to variable frequency power supply 1 work by power frequency supply 3 is finished.
This device in use, in power frequency supply 3 and variable frequency power supply 1 mutual handoff procedure, variable frequency power supply 1 and power frequency supply 3 have all been kept, and load 4 has common network constantly, reached the requirement of " throwing earlier " truly, a variable frequency power supply output is arranged by the handoff procedure of voltage source output simultaneously with current source output, not only guaranteed identical on frequency, phase place, the amplitude of variable frequency power supply 1 and power frequency supply 3, simultaneously also guaranteed in handoff procedure, not exist rush of current, the frequency conversion out put reactor between frequency conversion voltage, power-frequency voltage and the load 4
Play the effect of buffer current, guaranteed the reliability of variable frequency power supply 1, power frequency supply 3 and load 4 whole systems.
Claims (1)
1. power frequency supply and the online mutual switching control device of variable frequency power supply, comprise frequency conversion output contactor KM 2, power frequency output contactor KM 1, processor controls (2), variable frequency power supply (1) and power frequency supply (3), it is characterized in that: also comprise frequency conversion out put reactor L;
The power input of variable frequency power supply (1) connects the power output end of power frequency supply (3), the output of variable frequency power supply (1) is Series Frequency Conversion out put reactor L, frequency conversion output contactor KM 2 and load (4) successively, and power frequency output contactor KM1 is connected between the power output end and load (4) of power frequency supply (3);
Described processor controls (2), its input connects described power frequency output contactor KM 1 respectively, the contacts status signal output part of frequency conversion output contactor KM 2 and the collection voltage and current signal output of described variable frequency power supply (1), when variable frequency power supply (1) switches to power frequency supply (3), it is used for the output frequency of control of conversion power supply (1), the frequency of phase place and amplitude and input line voltage, phase place and amplitude are approached and variable frequency power supply (1) are exported as current source, then closed power frequency output contactor KM 1 disconnects control signal and the output of frequency conversion output contactor KM 2 then; When power frequency supply (3) switches to variable frequency power supply (1), frequency, phase place and the amplitude that it is used for output frequency, phase place and the amplitude of control of conversion power supply (1) and input line voltage approached and variable frequency power supply (1) exported as voltage source, then closed frequency conversion output contactor KM 2, instantaneous variable frequency power supply (1) is carried out current source output by its rated current, cut off power frequency output contactor KM 1 then, last control of conversion power supply (1) is pressed voltage source output; Its control signal output ends connects described power frequency output contactor KM 1, the contact signal input of frequency conversion output contactor KM 2 and the signal input end of described variable frequency power supply (1) respectively; Described processor controls (2) is a microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100148864A CN101562353B (en) | 2009-05-11 | 2009-05-11 | On-line mutual switching control device of fundamental frequency power supply and variable frequency power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100148864A CN101562353B (en) | 2009-05-11 | 2009-05-11 | On-line mutual switching control device of fundamental frequency power supply and variable frequency power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101562353A CN101562353A (en) | 2009-10-21 |
| CN101562353B true CN101562353B (en) | 2011-10-05 |
Family
ID=41221014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100148864A Active CN101562353B (en) | 2009-05-11 | 2009-05-11 | On-line mutual switching control device of fundamental frequency power supply and variable frequency power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101562353B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377385B (en) * | 2010-08-26 | 2014-04-23 | 日立电梯（广州）自动扶梯有限公司 | Bypass variable-frequency controller with phase detection |
| CN109921510B (en) * | 2017-12-12 | 2020-12-18 | 中国电信股份有限公司 | Non-power-off cutting device and method |
| CN110451394B (en) * | 2019-08-09 | 2021-01-12 | 康力电梯股份有限公司 | Method for reducing working condition switching time of bypass frequency conversion escalator |
| CN110953154A (en) * | 2019-10-31 | 2020-04-03 | 上海斯可络压缩机有限公司 | Screw compressor work frequency conversion online switching system |
| CN112234902B (en) * | 2020-09-30 | 2022-02-18 | 台安科技(无锡)有限公司 | Flexible synchronous switching method for high-voltage frequency converter |
| CN112994219A (en) * | 2021-03-11 | 2021-06-18 | 国网湖南省电力有限公司 | Synchronous grid-connected control method for double-path alternating current source seamless switching system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113439Y (en) * | 2007-06-19 | 2008-09-10 | 深圳市中传电气技术有限公司 | Large power frequency converter power frequency and variable frequency automatic switching device |
| CN201435618Y (en) * | 2009-05-11 | 2010-03-31 | 山东新风光电子科技发展有限公司 | An online switch control unit between power frequency supply and variable frequency power supply |
-
2009
- 2009-05-11 CN CN2009100148864A patent/CN101562353B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113439Y (en) * | 2007-06-19 | 2008-09-10 | 深圳市中传电气技术有限公司 | Large power frequency converter power frequency and variable frequency automatic switching device |
| CN201435618Y (en) * | 2009-05-11 | 2010-03-31 | 山东新风光电子科技发展有限公司 | An online switch control unit between power frequency supply and variable frequency power supply |
Non-Patent Citations (3)
| Title |
|---|
| 丁学文等.交流电机变频软起动时的问题及解决方法.《电力电子技术》.2001,第35卷(第5期),1，2，5. * |
| 朱洪波等.高压变频器与工频电源之间软切换方式研究.《电力系统自动化》.2004,第28卷(第6期),91-93. * |
| 赵跃等.回转式空气预热器变频一工频同步切换控制器.《电力自动化设备》.2006,第26卷(第8期),第72页第2栏、图3. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101562353A (en) | 2009-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101562353B (en) | On-line mutual switching control device of fundamental frequency power supply and variable frequency power supply | |
| CN105720595B (en) | A kind of three-phase load unbalance adjusting apparatus | |
| CN205248819U (en) | Looks switch is selected to three phase loads of low pressure | |
| CN104485734A (en) | Three-phase alternating-current composite type static diverter switch | |
| CN201435618Y (en) | An online switch control unit between power frequency supply and variable frequency power supply | |
| CN201708762U (en) | Double-voltage control circuit | |
| CN205610514U (en) | Control circuit of motor | |
| CN103094983A (en) | Power supply system and control method with automatic power source switch function | |
| CN113054885B (en) | Redundant switching system of tower machine converter | |
| CN107069935A (en) | The power switching device controlled based on PLC | |
| CN205666679U (en) | UPS of bypass automatic switch -over type | |
| CN106130165B (en) | The control circuit of automatic transfer switching electric appliance | |
| CN105762797A (en) | Phase selection switch circuit and phase selection switching control method for single-phase load | |
| CN204270847U (en) | A kind of intellectuality can the transformer of loaded capacity regulating voltage regulating | |
| CN205583706U (en) | Three -phase unbalanced load adjusting device | |
| CN201877880U (en) | Motor controlled switching circuit for primary/standby equipment | |
| CN208539574U (en) | A kind of three-phase imbalance regulating system phase-change switch | |
| CN109193669B (en) | Intelligent load distribution adjusting device for power distribution network | |
| CN204732875U (en) | A kind of phase-lacking protective device | |
| CN104701973B (en) | The control method of parallel connection power supply conversion equipment and parallel connection power supply conversion equipment | |
| CN113315452A (en) | Vibration motor amplitude regulation and control system | |
| CN202949277U (en) | Low-voltage switching circuit | |
| CN102005802A (en) | Power frequency UPS (Uninterrupted Power Supply) isolation center line circuit | |
| CN202435122U (en) | Two-path power supply circuit | |
| CN208257499U (en) | Dual power supply automatic bus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: XINFENGGUANG ELECTRONICS TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHANDONG XINFENG PHOTOELECTRIC SCIENCE + TECHNOLOGY DEVELOPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: County Road 272500 square Shandong city of Jining province Wenshang County No. 2 Patentee after: Shandong Xinfengguang Electronic Technology Development Co., Ltd. Address before: County Road 272500 square Shandong city of Jining province Wenshang County No. 2 Patentee before: Shandong Xinfeng Photoelectric Science & Technology Development Co., Ltd. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: He Hongchen Inventor after: Li Ruilai Inventor after: Yin Pengfei Inventor after: Xie Daohua Inventor before: He Hongchen Inventor before: Li Ruilai Inventor before: Yin Pengfei |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151209 Address after: Jincheng Road Economic Development Zone 272500 Shandong city of Jining province Wenshang County Patentee after: Shandong Xinfengguang Electronic Technology Development Co., Ltd. Patentee after: Wuyishan Sanken Electric Co. Ltd. Address before: County Road 272500 square Shandong city of Jining province Wenshang County No. 2 Patentee before: Shandong Xinfengguang Electronic Technology Development Co., Ltd. |