CN114069823B - Bypass seamless transfer circuit and method for active voltage drop clamping input control - Google Patents
Bypass seamless transfer circuit and method for active voltage drop clamping input control Download PDFInfo
- Publication number
- CN114069823B CN114069823B CN202111220885.2A CN202111220885A CN114069823B CN 114069823 B CN114069823 B CN 114069823B CN 202111220885 A CN202111220885 A CN 202111220885A CN 114069823 B CN114069823 B CN 114069823B
- Authority
- CN
- China
- Prior art keywords
- bypass
- air switch
- leakage protector
- power diode
- inverse fast
- 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
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000001012 protector Effects 0.000 claims abstract description 51
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 39
- 239000010703 silicon Substances 0.000 claims abstract description 39
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 claims abstract description 32
- 101150105073 SCR1 gene Proteins 0.000 claims abstract description 32
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 claims abstract description 32
- 101000668165 Homo sapiens RNA-binding motif, single-stranded-interacting protein 1 Proteins 0.000 claims abstract description 21
- 102100039692 RNA-binding motif, single-stranded-interacting protein 1 Human genes 0.000 claims abstract description 21
- 238000000819 phase cycle Methods 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 8
- 230000003111 delayed effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
Abstract
The invention discloses a bypass seamless transfer circuit and a bypass seamless transfer method for active voltage drop clamping input control, wherein the circuit comprises a main bypass and an auxiliary bypass, the main bypass comprises a bypass leakage protector, a first alternating-current contactor and a first inverse fast power diode, one end of the bypass leakage protector is connected with a bypass ammeter, the other end of the bypass ammeter is connected with a silicon controlled rectifier SCR1, the silicon controlled rectifier SCR1 is connected with one end of the first inverse fast power diode, the first alternating-current contactor is connected in parallel with two ends of the first inverse fast power diode, the auxiliary bypass comprises a silicon controlled rectifier SCR2, a second inverse fast power diode and a second alternating-current contactor, one end of the silicon controlled rectifier SCR2 is connected with one end of the second inverse fast power diode, and the second alternating-current contactor is connected with the second inverse fast power diode in parallel. The invention mainly solves the problem of access of a direct current seamless transfer bypass of the leakage protector at the low-voltage distribution network end, and can transfer the meter without power supply in the meter changing process by carrying out seamless transfer on a user through a bypass circuit.
Description
Technical Field
The invention relates to the field of meter change auxiliary of low-voltage distribution networks, in particular to a bypass seamless transfer circuit and a bypass seamless transfer method for active voltage drop clamping input control.
Background
When the main circuit is switched to the bypass circuit to replace an air switch, an ammeter or a leakage protector in the main circuit, the current adopted method is to switch the load to other circuits after the main circuit is disconnected, the load is powered down briefly, power failure loss is caused to customers requiring continuous power supply, and bypass switching is performed through the bypass main circuit controlled by an alternating current contactor.
At the low-voltage distribution network end, part of lines of users are maintained, for example, intelligent electric meters at the user side often need to be replaced regularly, and when the intelligent electric meters are replaced, the users are required to be matched with each other in a power failure mode, so that the complaints of the users are refused to be regulated, and the loss is really brought to the users with high requirements on the power supply continuity. In order to further improve power supply service and reduce power failure times, the invention mainly solves the problem of access of a direct current seamless transfer bypass of a leakage protector at a low-voltage distribution network end, for example, when an ammeter is replaced, a user is subjected to seamless transfer through a bypass circuit, and in the process of implementing meter replacement, an operator is ensured to be capable of replacing a meter without power failure in the whole meter replacement process.
Disclosure of Invention
The invention provides a bypass seamless transfer circuit and a bypass seamless transfer method for active voltage drop clamping input control, which aims to solve the problems of power interruption and transfer failure of a user when a main circuit is switched to a bypass circuit in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a seamless transfer circuit of bypass of initiative pressure drop clamp input control, includes main bypass and auxiliary bypass, main bypass includes bypass leakage protector, first ac contactor and first anti-quick power diode, bypass leakage protector's one end is connected with the bypass ammeter, and the other end of bypass ammeter is connected with SCR1, and SCR1 links to each other with the one end of first anti-quick power diode, first ac contactor connects in parallel at the both ends of first anti-quick power diode, auxiliary bypass includes SCR2, second anti-quick power diode and second ac contactor, SCR 2's one end links to each other with the one end of second anti-quick power diode, second ac contactor connects in parallel with second anti-quick power diode. According to the invention, the anti-parallel power diode group is connected with the alternating current contactor in parallel, the input of the power diode is controlled by presetting the opening and closing of the alternating current contactor, and the power diode has constant conduction voltage drop, so that the conduction impedance and the conduction voltage drop of the main bypass and the auxiliary bypass are in a controlled state, the transfer line can be naturally selected through the clamping impedance, and seamless transfer between the main bypass and the main circuit and between the transfer line and the auxiliary circuit can be realized; the method can be applied to high-voltage occasions by means of parallel connection of the alternating-current contactor and the power diode, and the power diode has constant conduction voltage drop when being conducted, so that the voltage drop of a circuit can be obviously changed, and the circuit can be obviously compared with a circuit without voltage drop.
As a preferable scheme of the invention, the main bypass and the auxiliary bypass are connected to a distribution network end user line, the distribution network end user line comprises a three-phase alternating current access end, an air switch, an ammeter, a leakage protector and a load, the three-phase alternating current access end is connected with the upper end of the air switch, the lower end of the air switch is connected with the upper end of the leakage protector through the ammeter, and the lower end of the leakage protector is connected with the load.
As a preferable scheme of the invention, the other end of the bypass leakage protector of the main bypass is connected to the upper end of the air switch, and the other end of the first inverse fast power diode of the main bypass is connected to the lower end of the leakage protector.
As a preferable scheme of the invention, the other end of the SCR2 of the auxiliary bypass is connected with the upper end of the air switch, and the other end of the second inverse fast power diode of the auxiliary bypass is connected with the lower end of the air switch.
As a preferable mode of the present invention, the first ac contactor, the second ac contactor, the SCR1 and the SCR2 are all opened in initial states.
A bypass seamless transfer method for active voltage drop clamping input control comprises the following steps: s1: connecting the main bypass and the auxiliary bypass to a distribution network end user line; firstly, connecting a main bypass to an upper port of an air switch and a lower port of a leakage protector, and connecting an auxiliary bypass to the upper port and the lower port of the air switch; s2: detecting the phase sequence of a user line at the power distribution network end; s2 specifically comprises the following steps: judging whether the phase sequence is correct or not by respectively detecting the voltages at the upper end of the air switch, the lower end of the air switch and the lower end of the electric leakage protector, and if the phase sequence is correct, giving a prompt tone by a buzzer to carry out S3; if the phase sequence is wrong, the buzzer continuously sounds to give out a phase sequence error prompt, the access sequence of the main bypass and the auxiliary bypass on the user line at the power distribution network end is adjusted, and the detection is performed again until the phase sequence detection is correct; s3: triggering a silicon controlled rectifier SCR1, then switching off an air switch, and switching on a first alternating current contactor after delay for n seconds; triggering the silicon controlled rectifier SCR1 in the main bypass, wherein the first alternating current contactor in the main bypass is not connected, at the moment, because the air switch in the main circuit is not disconnected, the on-resistance of the main circuit is approximately 0, and the on-resistance of the main bypass is larger than that of the main circuit because of the existence of the anti-parallel diode clamping circuit, although the silicon controlled rectifier SCR1 has trigger pulse, the silicon controlled rectifier SCR1 has no voltage difference (the conducted main circuit is short-circuited), the silicon controlled rectifier SCR1 cannot be conducted, the main bypass does not work, an maintainer turns off the air switch, the disconnection time of each phase contact point of the air switch is inconsistent, as long as the phase air switch is disconnected, the corresponding diode which is reversely connected in parallel with the corresponding SCR1 is naturally conducted, leakage current is not generated in theory in the process, after n seconds, the first anti-parallel fast power diode is disconnected because of the voltage loss after the first alternating current contactor is closed, and the impedance of the main bypass is reduced, so that the auxiliary bypass is ready to be put into operation; s4: the leakage protector is disconnected, the second alternating current contactor is closed, and at the moment, the circuits at the two ends of the ammeter are disconnected, so that the ammeter can be maintained; after the leakage protector is disconnected, the circuits at the two ends of the ammeter line are disconnected at the moment, the power supply of the load is supplied through the main bypass, maintenance personnel can maintain the ammeter circuit, and the auxiliary bypass silicon controlled rectifier SCR2 does not give trigger pulses at the moment and cannot be conducted; s5: after the ammeter maintenance is completed, the leakage protector is closed, and after the delay is p seconds, the silicon controlled rectifier SCR1 is disconnected, and meanwhile the silicon controlled rectifier SCR2 is turned on; after maintenance of the electricity meter line of the maintenance operator is finished, the leakage protector is closed, after a delay of p seconds, the silicon controlled rectifier SCR1 is disconnected, meanwhile, the silicon controlled rectifier SCR2 is turned on, after trigger pulse of the silicon controlled rectifier SCR1 in the main bypass is removed, after zero crossing of current in the main bypass, the main bypass is naturally turned off, after the main bypass is turned off, the auxiliary bypass is naturally turned on, and the switching between the main bypass and the auxiliary bypass is seamless, so that the circuit is powered through the auxiliary bypass; s6: after the delay is q seconds, the second alternating current contactor is disconnected, an air switch is closed after the delay is r seconds, and the main bypass and the auxiliary bypass are removed; and after a delay of p seconds, the second alternating current contactor is disconnected, current in the auxiliary bypass flows through the second inverse fast power diode, the auxiliary bypass clamp impedance is input, the air switch is closed after the delay of r seconds, an operator closes the air switch strongly, once the air switch is connected, the loop impedance of the air switch is far smaller than that of the auxiliary bypass, the auxiliary bypass can be automatically powered off due to voltage loss, the power supply of the main circuit is restored, and the main bypass and the auxiliary bypass can be removed.
As a preferred embodiment of the present invention, the S2 specifically is: judging whether the phase sequence is correct or not by respectively detecting the voltages at the upper end of the air switch, the lower end of the air switch and the lower end of the electric leakage protector, if the phase sequence is correct, giving out prompt tones by a buzzer, and entering S3; if the phase sequence is wrong, the buzzer continuously sounds to give a phase sequence error prompt, the access sequence of the main bypass and the auxiliary bypass on the user line at the power distribution network end is adjusted, detection is carried out again until the phase sequence detection is correct, and S3 is entered. This step is mainly to prevent wiring errors when the main bypass and the auxiliary bypass are connected to the distribution network end user line.
As a preferred embodiment of the present invention, n=1, p=1, q=1, r=5. The delay time of 1 second after the air switch is disconnected in S2 mainly ensures that the main circuit is thoroughly disconnected after the air switch is disconnected, and the air switch is not completely disconnected, but the air switch is possibly not completely disconnected, the 1 second delay time further ensures that the main circuit is thoroughly disconnected, the bypass transfer switching is completed, and the delay time of 1 second is a second protection link, and does not influence the transfer from the main circuit to the bypass; in S5, closing the leakage protector, delaying for 1 second, wherein the closing link of the leakage protector represents that the power supply starts to recover from the bypass to the power supply of the main circuit, and before the bypass is disconnected, the reliable closing of the leakage protector of the main circuit is further ensured, which is a second link for ensuring the reliable closing of the leakage protector; in S6, after the SCR1 is disconnected and the SCR2 is simultaneously turned on, the time is delayed for 1 second, so that the auxiliary bypass is further ensured to work normally, and no transient abnormality exists, namely the auxiliary bypass is smoothly switched to a circuit formed by the main circuit and the auxiliary bypass from the main bypass, and the step of ensuring the normal work of the auxiliary bypass is also performed in the second step; and S6, disconnecting the second alternating current contactor, and closing the air switch after a delay time is 5 seconds, so that after the second alternating current contactor is disconnected and the auxiliary bypass increases impedance, the circuit normally works by actively switching in the impedance circuit, the operation is stable, the active impedance switching in is ensured, the circuit is also used as a second protection link, the power supply of the main circuit is recovered for the last step, and the air switch of the main circuit is closed to be fully ready. The delay is a system delay, circuit switching is not affected, and under the condition of delay, the delay condition is fully utilized as a second protection link, so that the problem of abnormal transient response is prevented.
Therefore, the invention has the following beneficial effects: according to the invention, by improving the bypass circuit, controllable clamping impedance exists in the bypass circuit, and the bypass circuit can be actively and rapidly put into the bypass circuit after the main circuit is disconnected, so that the error action of the leakage protector in the main circuit cannot be influenced due to the input of the bypass circuit in the process; according to the invention, the anti-parallel power diode group is connected with the alternating current contactor in parallel, the input of the power diode is controlled by presetting the opening and closing of the alternating current contactor, the power diode has constant conduction voltage drop, so that the conduction impedance and the conduction voltage drop of the main bypass and the auxiliary bypass are in a controlled state, the transfer line can be naturally selected through the clamping impedance, and seamless transfer between the main bypass and the main circuit and between the auxiliary circuit can be realized.
Drawings
FIG. 1 is a schematic diagram of an active voltage drop clamp input controlled bypass seamless transfer circuit of the present invention;
FIG. 2 is a flow chart of a bypass seamless transfer method of active pressure drop clamping input control of the present invention;
in the figure: 1. a main bypass; 2. and an auxiliary bypass.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
As shown in fig. 1, a bypass seamless transfer circuit for active voltage drop clamping input control comprises a main bypass 1 and an auxiliary bypass 2, wherein the main bypass 1 comprises a bypass leakage protector, a first alternating current contactor and a first inverse fast power diode, one end of the bypass leakage protector is connected with a bypass ammeter, the other end of the bypass ammeter is connected with a silicon controlled rectifier SCR1, the silicon controlled rectifier SCR1 is connected with one end of the first inverse fast power diode, the first alternating current contactor is connected with two ends of the first inverse fast power diode in parallel, the auxiliary bypass 2 comprises a silicon controlled rectifier SCR2, a second inverse fast power diode and a second alternating current contactor, one end of the silicon controlled rectifier SCR2 is connected with one end of the second inverse fast power diode, and the second alternating current contactor is connected with the second inverse fast power diode in parallel.
The main bypass 1 and the auxiliary bypass 2 are connected to a distribution network end user line, the distribution network end user line comprises a three-phase alternating current access end, an air switch, an ammeter, a leakage protector and a load, the three-phase alternating current access end is connected with the upper end of the air switch, the lower end of the air switch is connected with the upper end of the leakage protector through the ammeter, and the lower end of the leakage protector is connected with the load.
The other end of the bypass leakage protector of the main bypass 1 is connected to the upper end of the air switch, the other end of the first inverse fast power diode of the main bypass 1 is connected to the lower end of the leakage protector, the other end of the silicon controlled rectifier SCR2 of the auxiliary bypass 2 is connected to the upper end of the air switch, and the other end of the second inverse fast power diode of the auxiliary bypass 2 is connected to the lower end of the air switch.
The initial states of the first alternating current contactor, the second alternating current contactor of the silicon controlled rectifier SCR1 and the silicon controlled rectifier SCR2 are all open, and the bypass seamless transfer method for the active voltage drop clamping input control shown in the figure 2 comprises the following steps of: s1: connecting a main bypass 1 and an auxiliary bypass 1 to a distribution network end user line; s2: detecting the phase sequence of a user line at the power distribution network end; s3: triggering a silicon controlled rectifier SCR1, then switching off an air switch, and switching on a first alternating current contactor after delay for n seconds; s4: the leakage protector is disconnected, the second alternating current contactor is closed, and at the moment, the circuits at the two ends of the ammeter are disconnected, so that the ammeter can be maintained; s5: after the ammeter maintenance is completed, the leakage protector is closed, and after the delay is p seconds, the silicon controlled rectifier SCR1 is disconnected, and meanwhile the silicon controlled rectifier SCR2 is turned on; s6: after a delay of q seconds, the second alternating current contactor is disconnected, and after a delay of r seconds, the air switch is closed, and the main bypass 1 and the auxiliary bypass 2 are removed.
Examples: firstly, connecting a main bypass 2 to an upper port of an air switch and connecting an auxiliary bypass 2 to a lower port of an electric leakage protector through an electric clamp, wherein the wiring point of the upper port of the air switch is the common wiring point of the main bypass 1 and the auxiliary bypass 2; detecting phase sequence, namely detecting voltages at an upper port of an air switch of an access point, a lower port of the air switch and a lower port of a leakage protector respectively, judging that the phase sequence is correct, then controlling a buzzer to give out prompt sounds for the next step, if the phase sequence is wrong, continuing the buzzer, giving out phase sequence error prompts on a liquid crystal screen on a panel, and detecting again until the phase sequence is detected; triggering the silicon controlled rectifier SCR1 in the main bypass 1, wherein the first alternating current contactor in the main bypass 1 is not connected, at the moment, because an air switch in the main circuit is not disconnected, the on-resistance of the main circuit is approximately 0, and the on-resistance of the main bypass 1 is larger than that of the main circuit because of the existence of the anti-parallel diode clamping circuit, although the silicon controlled rectifier SCR1 has trigger pulse, the silicon controlled rectifier SCR1 has no voltage difference (the conducted main circuit is short-circuited), the silicon controlled rectifier SCR1 cannot be conducted, and the main bypass 1 is not put into operation; the maintenance personnel disconnect the air switch, the disconnection time of each phase contact of the air switch is not consistent, and as long as the phase air switch is disconnected, the corresponding bypass is connected in parallel in opposite directions, the diode and the corresponding SCR1 are naturally conducted, and leakage current is not generated in theory in the process; the maintainer can then disconnect the leakage protector, at the moment, the circuits at the two ends of the ammeter wire are disconnected, the power supply of the load is supplied through the main bypass, and the maintainer can maintain the ammeter wire; after the main bypass 1 is put into operation, after the detection of the upper port of the air switch, the lower port of the air switch and the lower port of the leakage protector, the detection of the complete disconnection of the air switch is delayed for about 1s, the first alternating current contactor is closed, the anti-parallel power diode is disconnected because of the voltage loss after the first alternating current contactor is closed, the impedance of the main bypass 1 is reduced, and preparation is made for the input of the auxiliary bypass 2; closing the first alternating current contactor, closing the second alternating current contactor of the auxiliary bypass 2, wherein the SCR2 of the auxiliary bypass 2 does not give a trigger pulse and is not conducted; after maintenance of an electricity meter line of an overhaul operator is finished, closing the electric leakage protector, judging that the electric leakage protector is reliably closed by detecting the pressure difference among an upper port of an air switch, a lower port of the air switch and a lower port of the electric leakage protector by a detection line, disconnecting a silicon controlled rectifier SCR1 after time delay for 1s, simultaneously conducting a silicon controlled rectifier SCR2, naturally switching off the main bypass 1 after trigger pulse of the silicon controlled rectifier SCR1 is removed, naturally conducting an auxiliary bypass 2 after the main bypass 1 is closed, and switching between the main bypass 1 and the auxiliary bypass 2 is seamless, wherein the circuit is powered by the auxiliary bypass 2; after time delay of 1s, the second alternating current contact is disconnected, the current in the auxiliary bypass 2 is reversely input through the power diode, and the auxiliary bypass 2 clamps impedance input; delaying for 5s, and sending out an air closing switch instruction; the operator closes the air switch, once the air switch is turned on, the impedance of the air switch loop is far smaller than that of the auxiliary bypass 2, and the auxiliary bypass 2 can automatically cut off power due to voltage loss, so that the power supply of the main circuit is recovered; and the clamps of the main bypass 1 and the auxiliary bypass 2 of the upper port of the air switch, the lower port of the air switch and the lower port of the leakage protector at the junction point are moved out.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the present invention is not limited thereto, but any changes or substitutions that do not undergo the inventive effort should be construed as falling within the scope of the present invention.
Claims (5)
1. The bypass seamless transfer circuit is characterized by comprising a main bypass and an auxiliary bypass, wherein the main bypass comprises a bypass leakage protector, a first alternating current contactor and a first inverse fast power diode, one end of the bypass leakage protector is connected with a bypass ammeter, the other end of the bypass ammeter is connected with a silicon controlled rectifier SCR1, the silicon controlled rectifier SCR1 is connected with one end of the first inverse fast power diode, the first alternating current contactor is connected in parallel with two ends of the first inverse fast power diode, the auxiliary bypass comprises a silicon controlled rectifier SCR2, a second inverse fast power diode and a second alternating current contactor, one end of the silicon controlled rectifier SCR2 is connected with one end of the second inverse fast power diode, and the second alternating current contactor is connected in parallel with the second inverse fast power diode;
the main bypass and the auxiliary bypass are connected to a distribution network end user line, the distribution network end user line comprises a three-phase alternating current access end, an air switch, an ammeter, a leakage protector and a load, the three-phase alternating current access end is connected with the upper end of the air switch, the lower end of the air switch is connected with the upper end of the leakage protector through an ammeter, and the lower end of the leakage protector is connected with the load;
the other end of the bypass leakage protector of the main bypass is connected to the upper end of the air switch, and the other end of the first inverse fast power diode of the main bypass is connected to the lower end of the leakage protector;
the other end of the SCR2 of the auxiliary bypass is connected with the upper end of the air switch, and the other end of the second inverse fast power diode of the auxiliary bypass is connected with the lower end of the air switch.
2. The bypass seamless transfer circuit of active voltage drop clamp input control according to claim 1, wherein the initial states of the first ac contactor, the second ac contactor, the SCR1 and the SCR2 are all open.
3. A bypass seamless transfer method for active pressure drop clamp input control as defined in claim 1, comprising the steps of:
s1: connecting the main bypass and the auxiliary bypass to a distribution network end user line;
s2: detecting the phase sequence of a user line at the power distribution network end;
s3: triggering a silicon controlled rectifier SCR1, then switching off an air switch, and switching on a first alternating current contactor after delay for n seconds;
s4: the leakage protector is disconnected, the second alternating current contactor is closed, and at the moment, the circuits at the two ends of the ammeter are disconnected, so that the ammeter can be maintained;
s5: after the ammeter maintenance is completed, the leakage protector is closed, and after the delay is p seconds, the silicon controlled rectifier SCR1 is disconnected, and meanwhile the silicon controlled rectifier SCR2 is turned on;
s6: after a delay of q seconds, the second alternating current contactor is disconnected, and after a delay of r seconds, the air switch is closed, and the main bypass and the auxiliary bypass are removed.
4. The method for bypass seamless transfer of active pressure drop clamping input control according to claim 3, wherein S2 is specifically: judging whether the phase sequence is correct or not by respectively detecting the voltages at the upper end of the air switch, the lower end of the air switch and the lower end of the electric leakage protector, if the phase sequence is correct, giving out prompt tones by a buzzer, and entering S3; if the phase sequence is wrong, the buzzer continuously sounds to give a phase sequence error prompt, the access sequence of the main bypass and the auxiliary bypass on the user line at the power distribution network end is adjusted, detection is carried out again until the phase sequence detection is correct, and S3 is entered.
5. A bypass seamless transfer method of active pressure drop clamped input control according to claim 3, wherein n=1, p=1, q=1, r=5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111220885.2A CN114069823B (en) | 2021-10-20 | 2021-10-20 | Bypass seamless transfer circuit and method for active voltage drop clamping input control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111220885.2A CN114069823B (en) | 2021-10-20 | 2021-10-20 | Bypass seamless transfer circuit and method for active voltage drop clamping input control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114069823A CN114069823A (en) | 2022-02-18 |
| CN114069823B true CN114069823B (en) | 2023-10-31 |
Family
ID=80235065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111220885.2A Active CN114069823B (en) | 2021-10-20 | 2021-10-20 | Bypass seamless transfer circuit and method for active voltage drop clamping input control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114069823B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001069689A (en) * | 1999-08-31 | 2001-03-16 | Fuji Electric Co Ltd | Bypass circuit for uninterruptible power supply |
| WO2018090879A1 (en) * | 2016-11-15 | 2018-05-24 | 罗中良 | Double-bypass high-power light-adjusting controller |
| CN208835830U (en) * | 2018-06-15 | 2019-05-07 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of external bypass changeover device of UPS |
| CN109995135A (en) * | 2019-05-13 | 2019-07-09 | 沈阳睿捷电力科技有限公司 | Solve the uninterrupted seamless switching inverter power supply device of industry of Problem of Voltage Temporary-Drop |
| CN210350854U (en) * | 2019-10-22 | 2020-04-17 | 烟台海珐电气科技有限公司 | Seamless automatic switching loop for UPS power supply |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2923459T3 (en) * | 2020-01-28 | 2022-09-27 | Abb Schweiz Ag | power supply assembly |
-
2021
- 2021-10-20 CN CN202111220885.2A patent/CN114069823B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001069689A (en) * | 1999-08-31 | 2001-03-16 | Fuji Electric Co Ltd | Bypass circuit for uninterruptible power supply |
| WO2018090879A1 (en) * | 2016-11-15 | 2018-05-24 | 罗中良 | Double-bypass high-power light-adjusting controller |
| CN208835830U (en) * | 2018-06-15 | 2019-05-07 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of external bypass changeover device of UPS |
| CN109995135A (en) * | 2019-05-13 | 2019-07-09 | 沈阳睿捷电力科技有限公司 | Solve the uninterrupted seamless switching inverter power supply device of industry of Problem of Voltage Temporary-Drop |
| CN210350854U (en) * | 2019-10-22 | 2020-04-17 | 烟台海珐电气科技有限公司 | Seamless automatic switching loop for UPS power supply |
Non-Patent Citations (1)
| Title |
|---|
| 高频感应加热设备检修实例;张传旭;;热处理(02);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114069823A (en) | 2022-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5210685A (en) | Uninterruptible power supply system and load transfer static switch for such a system | |
| US8300435B2 (en) | Transmission system and a method for control thereof | |
| CN105720595B (en) | A kind of three-phase load unbalance adjusting apparatus | |
| KR101050605B1 (en) | Reclosing control system considering superconducting fault current limiter and its control method | |
| US9627923B2 (en) | Apparatus and methods for backfeed detection in and control of uninterruptible power systems | |
| CN106786613A (en) | A kind of pressure regulator and the regulating circuit comprising the pressure regulator | |
| Li et al. | A method of detecting commutation failure in multi-infeed HVDC systems based on critical failure impedance boundary | |
| CN109119975A (en) | A kind of failure protection method of the breaker of direct current system and its start-up course | |
| CN104037778B (en) | A kind of chain type SVG device with fault autoboot function | |
| Chehardeh et al. | Remote feeder transfer between out-of-phase sources using STS | |
| CN114069823B (en) | Bypass seamless transfer circuit and method for active voltage drop clamping input control | |
| CN106374507A (en) | Three-phase common compensation intelligent synchronous switch and control protection method thereof | |
| CN111371099B (en) | UPFC fault transition device and method based on thyristor transfer resistance circuit | |
| CN109149752A (en) | A kind of cyclization turn power supply SOP device, system and method | |
| CN216530701U (en) | Bypass seamless transfer circuit for active voltage drop clamping input control | |
| CN104113049A (en) | Single-phase grounding fault self-recovery system | |
| CN210092867U (en) | Converter station auxiliary device and converter station | |
| CN114784768A (en) | Over-current protection method for rail transit bidirectional power supply system | |
| CN111864703B (en) | Device and method for realizing direct-current networking of ship electric propulsion system | |
| CN208386436U (en) | A kind of modularization multi-level converter based on IGCT | |
| CN110350650B (en) | High-capacity high-reliability rapid power supply switching device and switching control method thereof | |
| CN102255271A (en) | Low-voltage rectifying device | |
| CN219592164U (en) | Control system for grid connection and disconnection of diesel generating set and commercial power | |
| CN213461564U (en) | DC inverter | |
| CN217307335U (en) | Low-voltage power supply and distribution switching system for dual-power incoming line single bus segmented operation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |