CN112366105A - High-speed synchronous closing method - Google Patents
High-speed synchronous closing method Download PDFInfo
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- CN112366105A CN112366105A CN202011373996.2A CN202011373996A CN112366105A CN 112366105 A CN112366105 A CN 112366105A CN 202011373996 A CN202011373996 A CN 202011373996A CN 112366105 A CN112366105 A CN 112366105A
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- closing
- control module
- voltage
- switching
- intelligent control
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 10
- 238000005299 abrasion Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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Classifications
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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
- H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H9/563—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle for multipolar switches, e.g. different timing for different phases, selecting phase with first zero-crossing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention discloses a synchronous contactor, which comprises a synchronous signal acquisition module, an intelligent control module and a switching-on control module, wherein the synchronous signal acquisition module comprises a three-phase voltage acquisition sub-module and an electric angle acquisition sub-module; the intelligent control module is used for processing and operating the same-walking data signals of the data collected by the synchronous signal collection module, and outputting the same-walking control signals to the closing control module according to the operation result, and the closing control module comprises a same-walking controllable switch and a switch same-walking control circuit and is used for closing according to the instruction of the intelligent control module. The synchronous contactor collects and calculates synchronous signals, automatically adjusts and outputs switching control signals according to the inherent mechanical characteristics of the contactor, can ensure that a switching-on point is just positioned in the range of +/-10% of the voltage difference of 0 points on two sides of a knife switch each time, reduces switching-on impact current, and improves the service life and the safety of equipment.
Description
Technical Field
The invention belongs to the technical field of circuit control, and particularly relates to a high-speed synchronous closing method.
Background
With the rapid development of the power grid, a new pattern of the power system using the 220 kV line as the main power supply network is gradually formed, and in order to meet the requirement of an operation mode, switching operation of the 220 kV line or above occurs. In order to ensure the stable operation of the system, when the circuit breaker is switched on, whether the voltages on the two sides meet the synchronous condition or not must be considered to avoid the oscillation and impact which may be brought to the power grid, so the integrity of the synchronous switching-on device and the synchronous switching-on loop is very important.
The essence of the synchronous control technology is that the circuit breaker is controlled to complete switching on at an expected current phase position so as to reduce the ablation of electric arc to a switch, improve the switching-on capacity and the service life of the circuit breaker, and the required targets are respectively: the timeliness of synchronous closing of the circuit breaker (the current phase zero point needs to be predicted before the relay protection system responds so as to achieve the purpose of matching the system) is controlled, and the reliability of synchronous closing of the circuit breaker is also controlled.
Disclosure of Invention
In order to solve the technical problem, the invention provides a synchronous contactor, which comprises a synchronous signal acquisition module, an intelligent control module and a switching-on control module, wherein the synchronous signal acquisition module comprises a three-phase voltage acquisition submodule and an electrical angle acquisition submodule, the three-phase voltage acquisition submodule is used for acquiring and measuring voltages on two sides of a switch blade in real time and transmitting a measured value to the intelligent control module in real time, and the electrical angle acquisition submodule is used for acquiring and measuring a phase angle difference of potentials on two sides of the switch blade in real time and transmitting the measured value to the intelligent control module in real time; the intelligent control module is used for processing and operating the same-walking data signals of the data acquired by the synchronous signal acquisition module and outputting the same-walking control signals to the switching-on control module according to the operation result, and the switching-on control module comprises a same-walking controllable switch and a switch same-walking control circuit and is used for switching-on operation according to the instruction of the intelligent control module; the intelligent control module is internally stored with an initial closing voltage point, when the intelligent control module is closed for the first time, when the voltage value detected by the synchronous signal acquisition module in real time reaches the initial closing voltage point, the intelligent control module controls the same-level controllable switch to start closing, after the initial closing voltage point completes the required time through the closing action of the same-level controllable switch, the voltage just drops to be 0 point, the intelligent control module stores the required time for closing for each time, the voltage sine curve is used for adjusting and storing the closing voltage point according to the required time for closing, and the closing is controlled according to the adjusted closing voltage point for the next closing.
Further, the same controllable switch is a permanent magnet split-phase independent mechanism.
The invention also discloses a control method of the above-mentioned synkinetic contactor, an initial closing voltage point is stored in the intelligent control module, the initial closing voltage point corresponds to a voltage point of which the voltage on both sides of the knife switch is just 0V after the time taken by the mechanical action in the process of closing the synkinetic controllable switch is finished, namely, the closing is synchronously controlled when the intelligent control module detects that a voltage change curve is positioned at the initial closing voltage point, and when the closing is finished, the voltage on both sides of the knife switch is just 0V, the closing at the 0 point is realized; after each time of switching on, the intelligent control module collects and stores the time for switching on and the voltage of a switching on point, then calculates the next switching on voltage point according to the voltage change curve, and controls the next switching on action to start by using a new switching on voltage point.
Therefore, the beneficial effects of the invention are as follows:
1. the synchronous contactor collects and calculates synchronous signals and automatically adjusts and outputs switching control signals according to the inherent mechanical characteristics of the contactor. The voltage of each switching-on point right at the two sides of the knife switch is 0 point, switching-on impact current in the switching-on process is reduced, and the service life and the safety of equipment are improved;
2. because of the occurrence of natural changes such as mechanical abrasion, corrosion and the like of the synchronously controllable switch after long-time use, the time used by mechanical action of each closing is not completely the same or stable all the time, and if the voltage points of each closing are the same, the closing at the 0 point can not be ensured after a long time. The invention automatically tracks the same-step state for different operating conditions by automatically correcting during each closing, thereby achieving the purpose of limiting the closing impact current.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The following is a detailed description with reference to examples:
the synchronous contactor comprises a synchronous signal acquisition module, an intelligent control module and a switching-on control module, wherein the synchronous signal acquisition module comprises a three-phase voltage acquisition submodule and an electrical angle acquisition submodule, the three-phase voltage acquisition submodule is used for acquiring and measuring voltages on two sides of a switch blade in real time and transmitting a measured value to the intelligent control module in real time, and the electrical angle acquisition submodule is used for acquiring and measuring a phase angle difference of potentials on two sides of the switch blade in real time and transmitting the measured value to the intelligent control module in real time; the intelligent control module is used for processing and operating the same-walking data signals of the data acquired by the synchronous signal acquisition module and outputting the same-walking control signals to the switching-on control module according to the operation result, and the switching-on control module comprises a same-walking controllable switch and a switch same-walking control circuit and is used for switching-on operation according to the instruction of the intelligent control module; the intelligent control module is internally stored with an initial closing voltage point, when the intelligent control module is closed for the first time, when the voltage value detected by the synchronous signal acquisition module in real time reaches the initial closing voltage point, the intelligent control module controls the same-level controllable switch to start closing, after the initial closing voltage point completes the required time through the closing action of the same-level controllable switch, the voltage just drops to be 0 point, the intelligent control module stores the required time for closing for each time, the voltage sine curve is used for adjusting and storing the closing voltage point according to the required time for closing, and the closing is controlled according to the adjusted closing voltage point for the next closing.
Because of the occurrence of natural changes such as mechanical abrasion, corrosion and the like of the synchronously controllable switch after long-time use, the time used by mechanical action of each closing is not completely the same or stable all the time, and if the voltage points of each closing are the same, the closing at the 0 point can not be ensured after a long time. Therefore, the method for controlling the co-operating contactor of the present invention comprises: an initial closing voltage point is stored in the intelligent control module, the initial closing voltage point corresponds to a voltage point of which the voltage on two sides of the knife switch is just 0V after the time taken by the mechanical action in the process of closing the switch through the same-step controllable switch is finished, namely, the closing is synchronously controlled when the intelligent control module detects that a voltage change curve is located at the initial closing voltage point, and the voltage on two sides of the knife switch is just 0V after the closing is finished, so that the closing at the 0 point is realized; after each time of switching on, the intelligent control module collects and stores the time for switching on and the voltage of a switching on point, then calculates the next switching on voltage point according to the voltage change curve, and controls the next switching on action to start by using a new switching on voltage point.
The technical solutions provided by the present invention are described in detail above, and for those skilled in the art, the ideas according to the embodiments of the present invention may be changed in the specific implementation manners and the application ranges, and in summary, the content of the present description should not be construed as limiting the present invention.
Claims (3)
1. The synchronous contactor is characterized by comprising a synchronous signal acquisition module, an intelligent control module and a switching-on control module, wherein the synchronous signal acquisition module comprises a three-phase voltage acquisition submodule and an electrical angle acquisition submodule, the three-phase voltage acquisition submodule is used for acquiring and measuring voltages on two sides of a knife switch in real time and transmitting a measured value to the intelligent control module in real time, and the electrical angle acquisition submodule is used for acquiring and measuring a phase angle difference of potentials on two sides of the knife switch in real time and transmitting the measured value to the intelligent control module in real time; the intelligent control module is used for processing and operating the same-walking data signals of the data acquired by the synchronous signal acquisition module and outputting the same-walking control signals to the switching-on control module according to the operation result, and the switching-on control module comprises a same-walking controllable switch and a switch same-walking control circuit and is used for switching-on operation according to the instruction of the intelligent control module; the intelligent control module is internally stored with an initial closing voltage point, when the intelligent control module is closed for the first time, when the voltage value detected by the synchronous signal acquisition module in real time reaches the initial closing voltage point, the intelligent control module controls the same-level controllable switch to start closing, after the initial closing voltage point completes the required time through the closing action of the same-level controllable switch, the voltage just drops to be 0 point, the intelligent control module stores the required time for closing for each time, the voltage sine curve is used for adjusting and storing the closing voltage point according to the required time for closing, and the closing is controlled according to the adjusted closing voltage point for the next closing.
2. The co-located contactor according to claim 1, wherein the co-located controllable switch is a permanent magnet split-phase independent mechanism.
3. The method for controlling a synkinetic contactor as claimed in claim 1, wherein an initial closing voltage point is stored in the intelligent control module, the initial closing voltage point corresponds to a voltage point at which the voltage at both sides of the knife switch is exactly 0V after the time taken for the completion of the mechanical action in the closing process of the synkinetic controllable switch, that is, when the intelligent control module detects that the voltage variation curve is located at the initial closing voltage point, the closing is synchronously controlled, and when the closing is completed, the voltage at both sides of the knife switch is exactly 0V, the closing at 0 point is realized; after each time of switching on, the intelligent control module collects and stores the time for switching on and the voltage of a switching on point, then calculates the next switching on voltage point according to the voltage change curve, and controls the next switching on action to start by using a new switching on voltage point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011373996.2A CN112366105A (en) | 2020-11-30 | 2020-11-30 | High-speed synchronous closing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011373996.2A CN112366105A (en) | 2020-11-30 | 2020-11-30 | High-speed synchronous closing method |
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| Publication Number | Publication Date |
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| CN112366105A true CN112366105A (en) | 2021-02-12 |
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| CN202011373996.2A Pending CN112366105A (en) | 2020-11-30 | 2020-11-30 | High-speed synchronous closing method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489702A (en) * | 2013-09-05 | 2014-01-01 | 瑞亿智能控制设备（深圳）有限公司 | Breaker on-off control device based on photoelectrical position detection and control method thereof |
| CN203445064U (en) * | 2013-09-10 | 2014-02-19 | 温州大学 | Closing phase control system of AC contactor |
| CN105717842A (en) * | 2016-03-21 | 2016-06-29 | 珠海博威智能电网有限公司 | Zero crossing detection medium voltage on-off controller and control method |
| CN106451486A (en) * | 2016-09-21 | 2017-02-22 | 上海思源电力电容器有限公司 | Phase-selection switching control system of high-voltage circuit breaker |
| CN106451762A (en) * | 2016-08-17 | 2017-02-22 | 武汉国想电力科技股份有限公司 | Zero transition process condition detection and intelligent control method and device |
-
2020
- 2020-11-30 CN CN202011373996.2A patent/CN112366105A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489702A (en) * | 2013-09-05 | 2014-01-01 | 瑞亿智能控制设备（深圳）有限公司 | Breaker on-off control device based on photoelectrical position detection and control method thereof |
| CN203445064U (en) * | 2013-09-10 | 2014-02-19 | 温州大学 | Closing phase control system of AC contactor |
| CN105717842A (en) * | 2016-03-21 | 2016-06-29 | 珠海博威智能电网有限公司 | Zero crossing detection medium voltage on-off controller and control method |
| CN106451762A (en) * | 2016-08-17 | 2017-02-22 | 武汉国想电力科技股份有限公司 | Zero transition process condition detection and intelligent control method and device |
| CN106451486A (en) * | 2016-09-21 | 2017-02-22 | 上海思源电力电容器有限公司 | Phase-selection switching control system of high-voltage circuit breaker |
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Application publication date: 20210212 |