CN111987789A - Seamless ATS switch and control method thereof - Google Patents
Seamless ATS switch and control method thereof Download PDFInfo
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- CN111987789A CN111987789A CN202010758164.6A CN202010758164A CN111987789A CN 111987789 A CN111987789 A CN 111987789A CN 202010758164 A CN202010758164 A CN 202010758164A CN 111987789 A CN111987789 A CN 111987789A
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- incoming line
- switch
- phase control
- control switch
- controller
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to a seamless ATS switch and a control method thereof, comprising a controller, a three-phase control switch of an incoming line 1 and a three-phase control switch of an incoming line 2; the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 both adopt IGBT switches; and the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 are controlled by a controller. The invention can realize seamless rapid switching of the switch and also realize uninterrupted switching of the electric equipment.
Description
Technical Field
The invention relates to the field of power system design, in particular to a seamless ATS switch and a control method thereof.
Background
At present, most ATS switches adopt an isolation circuit breaker to realize automatic switching of power supplies, and whether switching is carried out or not is determined by judging the voltage and the non-voltage of two paths of incoming line power supplies.
The ATS switch of the above type has long action time, and can not realize the switching of the equipment in the station without power failure, thereby failing to meet the reliability of power supply
Disclosure of Invention
In view of the above, the present invention is to provide a seamless ATS switch and a control method thereof, which can not only realize seamless fast switching of the switch, but also realize uninterrupted switching of the electrical equipment.
The invention is realized by adopting the following scheme: a seamless ATS switch comprises a controller, a three-phase control switch of an inlet wire 1 and a three-phase control switch of an inlet wire 2;
the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 both adopt IGBT switches;
and the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 are controlled by a controller.
Further, the incoming line 1 is a main power supply, and the incoming line 2 is a standby power supply; when the incoming line 1 loses power, the controller turns off the three-phase control switch of the incoming line 1 and then turns on the three-phase control switch of the incoming line 2; when the power supply of the inlet wire 1 is recovered, the controller turns off the three-phase switch of the inlet wire 2 and then turns on the three-phase control switch of the inlet wire 1.
Furthermore, the controller comprises a CPU module, and a first A/D module, a second A/D module, a third A/D module, a first I/O module, a second I/O module and a communication module which are connected with the CPU module;
the first A/D module is used for acquiring the voltage of the incoming line 1, converting the voltage into a digital signal and transmitting the digital signal to the CPU module; the second A/D module is used for acquiring the voltage of the incoming line 2, converting the voltage into a digital signal and transmitting the digital signal to the CPU module; the third A/D module is used for acquiring outlet current, converting the outlet current into a digital signal and transmitting the digital signal to the CPU module; the first I/O module is used for acquiring the switch position states of the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2, converting the switch position states into switching value signals and transmitting the switching value signals to the CPU module;
the CPU module carries out logic judgment by acquiring the voltage of the incoming line 1, the voltage of the incoming line 2, the outgoing line current and the switch position state, and sends a switching-on/off command to the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 through the second I/O module;
the communication module is used for realizing the communication between the ATS switch and the dispatching system, uploading the state of the ATS switch module in real time and receiving a remote control instruction of the dispatching system to the ATS switch.
The invention also provides a control method based on the seamless ATS switch, which specifically comprises the following steps:
after the controller is electrified, the amplitude, the phase and the frequency of each phase voltage are obtained by collecting the three-phase voltages of the incoming line 1 and the incoming line 2, and each phase voltage V at each sampling moment is calculatedkn(K) The calculated value of (a):
Vkn(K)＝Hcos(2πfK+kn)；
wherein k represents A, B, C phases; n is 1 or 2, and respectively represents an inlet wire 1 and an inlet wire 2; k represents the Kth sampling point; h is the amplitude value of the signal,knis the k phase of the incoming line n, and f is the frequency;
the controller compares the actual value V 'of each phase voltage at each moment by tracking'kn(K) And the calculated value Vkn(K) To determine whether to turn onAnd switching off, wherein the action logic simultaneously satisfies the following two expressions:
wherein Δ is an actual value V'kn(K) And the calculated value Vkn(K) The absolute value of the difference; alpha is a fixed value set by the controller; beta is 1.2 times of zero drift threshold value;
when the continuous l sampling points of controller all satisfy following formula, the controller starts the switching logic, cuts off the three-phase control switch of inlet wire 1 to the three-phase control switch of inlet wire 2 is closed in the time delay through 1 sampling moment:
|Hkm|＞γ；
in the formula, HkmIs the effective value of each phase voltage; gamma is a set value set by the controller.
Further, the value of l is 5.
Compared with the prior art, the invention has the following beneficial effects: the invention introduces IGBT (insulated gate bipolar transistor) into an ATS switch system, and provides a no-difference tracking method aiming at the seamless ATS switch.
Drawings
Fig. 1 is a schematic diagram of an ATS switch controller according to an embodiment of the present invention.
Fig. 2 is a partial structure diagram of an ATS switch according to an embodiment of the present invention.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1 and fig. 2, the present embodiment provides a seamless ATS switch, which includes a controller, a three-phase control switch of an incoming line 1, and a three-phase control switch of an incoming line 2;
the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 both adopt IGBT switches;
and the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 are controlled by a controller.
In this embodiment, the incoming line 1 is a main power supply, the incoming line 2 is a standby power supply, the two are interchangeable, and when the two are interchanged, the incoming line 1 and the incoming line 2 in the following control method are also interchanged correspondingly; when the incoming line 1 loses power, the controller turns off the three-phase control switch T1 of the incoming line 1 and then turns on the three-phase control switch T2 of the incoming line 2; when the power supply of the inlet wire 1 is recovered, the controller turns off the three-phase switch T2 of the inlet wire 2 and then turns on the three-phase control switch T1 of the inlet wire 1.
As shown in fig. 1, the controller includes a CPU module, and a first a/D module, a second a/D module, a third a/D module, a first I/O module, a second I/O module, and a communication module connected thereto;
the first A/D module is used for acquiring the voltage of the incoming line 1, converting the voltage into a digital signal and transmitting the digital signal to the CPU module; the second A/D module is used for acquiring the voltage of the incoming line 2, converting the voltage into a digital signal and transmitting the digital signal to the CPU module; the third A/D module is used for acquiring outlet current, converting the outlet current into a digital signal and transmitting the digital signal to the CPU module for the calculation of the CPU controller; the first I/O module is used for acquiring the switch position states of the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2, converting the switch position states into switching value signals, transmitting the switching value signals to the CPU module and using the switching value signals for the CPU controller to perform logic judgment; the CPU module carries out logic judgment by acquiring the voltage of the incoming line 1, the voltage of the incoming line 2, the outgoing line current and the switch position state, and sends a switching-on/off command to the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 through the second I/O module; t1 and T2 in fig. 1 are opening and closing commands of the incoming line 1 switch and the incoming line 2 switch, respectively;
the communication module is used for realizing the communication between the ATS switch and the dispatching system, uploading the state of the ATS switch module in real time and receiving a remote control instruction of the dispatching system to the ATS switch.
In fig. 2, a1, B1, C1 and a2, B2, C2 are three-phase inputs of incoming line 1 and incoming line 2, respectively; A. b, C is the three-phase output after switching by the switch; t1 and T2 are control switches for incoming line 1 and incoming line 2, respectively. In the embodiment, an IGBT (insulated gate bipolar transistor) is used as a control switch, and the IGBT has low driving power and high switching speed, generally about 10 um. The switch controller switches on or off the T1 or the T2 through logic judgment, and seamless switching of the incoming line 1 and the incoming line 2 is achieved.
The embodiment further provides a control method based on the seamless ATS switch, which specifically includes the following steps:
the sampling frequency of the controller is 10kHz, namely 200 points are sampled by one cycle, and after the controller is electrified, the three-phase voltage V of the incoming line 1 and the incoming line 2 is acquiredA1、VB1、VC1、VA2、VB2、VC2The amplitude, phase and frequency of each phase voltage are obtained, and each phase voltage V is calculated at each sampling momentkn(K) The calculated value of (a):
Vkn(K)＝Hcos(2πfK+kn)；
wherein k represents A, B, C phases; n is 1 or 2, and respectively represents an inlet wire 1 and an inlet wire 2; k represents the Kth sampling point, and the value of the Kth sampling point is 1, 2 and 3 … 200; h is the amplitude value of the signal,knis the k phase of the incoming line n, and f is the frequency;
the controller compares the actual value V 'of each phase voltage at each moment by tracking'kn(K) And the calculated value Vkn(K) And judging whether to switch or not, wherein the action logic of the switch is that the following two expressions are simultaneously satisfied:
wherein Δ is an actual value V'kn(K) And the calculated value Vkn(K) The absolute value of the difference; alpha is a fixed value set by the controller; beta is 1.2 times of zero drift threshold value;
when the continuous l sampling points of controller all satisfy following formula, the controller starts the switching logic, cuts off the three-phase control switch of inlet wire 1 to the three-phase control switch of inlet wire 2 is closed in the time delay through 1 sampling moment:
|Hkm|＞γ；
in the formula, HkmIs the effective value of each phase voltage; gamma is a set value set by the controller.
Wherein, the value of l in this embodiment is 5. The whole process only needs 1 sampling moment, namely 0.1 ms.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (5)
1. A seamless ATS switch is characterized by comprising a controller, a three-phase control switch of an incoming line 1 and a three-phase control switch of an incoming line 2;
the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 both adopt IGBT switches;
and the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 are controlled by a controller.
2. A seamless ATS switch as claimed in claim 1, wherein incoming line 1 is the main power supply and incoming line 2 is the backup power supply; when the incoming line 1 loses power, the controller turns off the three-phase control switch of the incoming line 1 and then turns on the three-phase control switch of the incoming line 2; when the power supply of the inlet wire 1 is recovered, the controller turns off the three-phase switch of the inlet wire 2 and then turns on the three-phase control switch of the inlet wire 1.
3. A seamless ATS switch according to claim 1 wherein the controller includes a CPU module and connected first, second, third, first, second and communication modules;
the first A/D module is used for acquiring the voltage of the incoming line 1, converting the voltage into a digital signal and transmitting the digital signal to the CPU module; the second A/D module is used for acquiring the voltage of the incoming line 2, converting the voltage into a digital signal and transmitting the digital signal to the CPU module; the third A/D module is used for acquiring outlet current, converting the outlet current into a digital signal and transmitting the digital signal to the CPU module; the first I/O module is used for acquiring the switch position states of the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2, converting the switch position states into switching value signals and transmitting the switching value signals to the CPU module;
the CPU module carries out logic judgment by acquiring the voltage of the incoming line 1, the voltage of the incoming line 2, the outgoing line current and the switch position state, and sends a switching-on/off command to the three-phase control switch of the incoming line 1 and the three-phase control switch of the incoming line 2 through the second I/O module;
the communication module is used for realizing the communication between the ATS switch and the dispatching system, uploading the state of the ATS switch module in real time and receiving a remote control instruction of the dispatching system to the ATS switch.
4. A method of controlling a seamless ATS switch according to any one of claims 1-3, comprising the steps of:
after the controller is electrified, the amplitude, the phase and the frequency of each phase voltage are obtained by collecting the three-phase voltages of the incoming line 1 and the incoming line 2, and each phase voltage V at each sampling moment is calculatedkn(K) The calculated value of (a):
Vkn(K)＝Hcos(2πfK+kn)；
wherein k represents A, B, C phases; n is 1 or 2Respectively representing an incoming line 1 and an incoming line 2; k represents the Kth sampling point; h is the amplitude value of the signal,knis the k phase of the incoming line n, and f is the frequency;
the controller compares the actual value V 'of each phase voltage at each moment by tracking'kn(K) And the calculated value Vkn(K) And judging whether to switch or not, wherein the action logic of the switch is that the following two expressions are simultaneously satisfied:
wherein Δ is an actual value V'kn(K) And the calculated value Vkn(K) The absolute value of the difference; alpha is a fixed value set by the controller; beta is 1.2 times of zero drift threshold value;
when the continuous l sampling points of controller all satisfy following formula, the controller starts the switching logic, cuts off the three-phase control switch of inlet wire 1 to the three-phase control switch of inlet wire 2 is closed in the time delay through 1 sampling moment:
|Hkm|＞γ；
in the formula, HkmIs the effective value of each phase voltage; gamma is a set value set by the controller.
5. The method of claim 4, wherein the value of l is 5.
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| CN202010758164.6A CN111987789B (en) | 2020-07-31 | 2020-07-31 | Control method of seamless ATS switch |
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| CN202010758164.6A CN111987789B (en) | 2020-07-31 | 2020-07-31 | Control method of seamless ATS switch |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200994080Y (en) * | 2006-12-25 | 2007-12-19 | 孙毅彪 | Fast dual-power switcher |
| CN105606908A (en) * | 2015-12-24 | 2016-05-25 | 北京合康亿盛变频科技股份有限公司 | Detection method and detection device of three-phase AC circuit phase loss fault |
| CN205725135U (en) * | 2016-03-15 | 2016-11-23 | 重庆瑞升康博电气有限公司 | Three-phase intelligent seamless auto switching device for dual-electric source |
| CN107017691A (en) * | 2017-05-16 | 2017-08-04 | 国网福建省电力有限公司 | Many charger parallel Operation Control methods of transformer station |
| US10491036B1 (en) * | 2017-03-30 | 2019-11-26 | Amazon Technologies, Inc. | Solid-state automatic transfer switch |
-
2020
- 2020-07-31 CN CN202010758164.6A patent/CN111987789B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200994080Y (en) * | 2006-12-25 | 2007-12-19 | 孙毅彪 | Fast dual-power switcher |
| CN105606908A (en) * | 2015-12-24 | 2016-05-25 | 北京合康亿盛变频科技股份有限公司 | Detection method and detection device of three-phase AC circuit phase loss fault |
| CN205725135U (en) * | 2016-03-15 | 2016-11-23 | 重庆瑞升康博电气有限公司 | Three-phase intelligent seamless auto switching device for dual-electric source |
| US10491036B1 (en) * | 2017-03-30 | 2019-11-26 | Amazon Technologies, Inc. | Solid-state automatic transfer switch |
| CN107017691A (en) * | 2017-05-16 | 2017-08-04 | 国网福建省电力有限公司 | Many charger parallel Operation Control methods of transformer station |
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| CN111987789B (en) | 2022-11-08 |
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