CN203352193U - Intelligent controller of vacuum circuit breaker phase selection operation - Google Patents
Intelligent controller of vacuum circuit breaker phase selection operation Download PDFInfo
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- CN203352193U CN203352193U CN 201320369226 CN201320369226U CN203352193U CN 203352193 U CN203352193 U CN 203352193U CN 201320369226 CN201320369226 CN 201320369226 CN 201320369226 U CN201320369226 U CN 201320369226U CN 203352193 U CN203352193 U CN 203352193U
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Abstract
The utility model discloses an intelligent controller of a vacuum circuit breaker phase selection operation. The intelligent controller includes a power grid signal acquisition unit, a circuit breaker displacement detection unit, an environment detecting unit, a digital signal processing unit, and a circuit breaker drive unit. The power grid signal acquisition unit connects a three-phase voltage and current signal collected by a power grid with the input end of the digital signal processing unit. The output signal of the circuit breaker displacement detection unit is connected with the input end of the digital signal processing unit. The output voltage signal of the environment detecting unit is connected to the input end of the digital signal processing unit. The output end of the digital signal processing unit is connected to the input end of the circuit breaker drive unit; the circuit breaker drive unit converts a predicted time signal into an electrical signal, and outputs the electrical signal to an excitation circuit of the vacuum circuit breaker of a permanent magnetic mechanism; and the switching-on coil is energized so as to control a vacuum circuit breaker moving contact of the permanent magnetic mechanism to operate in a preset condition.
Description
Technical field
The utility model relates to a kind of breaker controller grid-connected for transformer during no-load closing, is specifically related to a kind of vacuum circuit-breaker and selects phase operative intelligence controller.
Background technology
Can produce at random a very high electric current in the transformer process grid-connected at idle-loaded switching-on; this electric current can be got back to normal no-load current value at short notice; but the high electric current that moment produces is enough to make the transformer differential protection misoperation, cause the transformer can not be normally grid-connected.In existing technology, widely used scheme has when closing a floodgate outside series resistance inductance etc., and these schemes can reduce the peak value that excitation is gushed, and also can reduce the lasting time of magnetizing inrush current, but effect is limited, does not fundamentally eliminate magnetizing inrush current.
Popular phase-controlled technical know-how in recent years, by the detection of grid electric current, the moment that is just in time zero in the power network current value without the remanent magnetism transformer closes a floodgate and can reach the purpose of thorough elimination magnetizing inrush current, but because links in operating process has error, especially the vacuum circuit-breaker divide-shut brake has larger dispersiveness operate time, and effect is unsatisfactory.For the safety action time stablizes, vacuum circuit-breaker actuating part has generally adopted monostable or bistable-state permanent magnet mechanism, but operating mechanism still is subject to many-sided impacts such as coil power voltage and environment temperature and humidity, causes dispersiveness can not meet high-precision requirement.
The utility model content
Technical problem to be solved in the utility model be to provide a kind of closing time more accurately vacuum circuit-breaker select phase operative intelligence controller.
For addressing the above problem, the designed vacuum circuit-breaker of the utility model selects phase operative intelligence controller, mainly by power network signal collecting unit, circuit breaker displacement detecting unit, environmental detection unit, digital signal processing unit and circuit breaker driver element, formed, wherein
Above-mentioned power network signal collecting unit comprises voltage transformer, current transformer, simple modulate circuit and A/D change-over circuit.Voltage transformer is connected in parallel on the electrical network sampling end, current transformer is connected on the electrical network sampling end, the output of voltage transformer summation current transformer all is connected to the input of simple modulate circuit, the output of simple modulate circuit is linked into the input of A/D change-over circuit, and the output of A/D change-over circuit is connected to the input of digital signal processing unit.
Above-mentioned circuit breaker displacement detecting unit comprises circuit breaker displacement transducer and displacement signal change-over circuit.The circuit breaker displacement transducer is arranged near the moving contact bindiny mechanism of permanent magnetic actuator vacuum circuit breaker, the output of circuit breaker displacement transducer is linked into the input of displacement signal change-over circuit, and displacement signal change-over circuit output connects the input of digital signal processing unit.
Above-mentioned environmental detection unit comprises temperature sampling sensor and signaling conversion circuit.The output of temperature sampling sensor is linked into the input of signaling conversion circuit, and the output of signaling conversion circuit is linked into the input of digital signal processing unit.
Above-mentioned circuit breaker driver element comprises PWM(pulse width modulation) output control circuit and IGBT(insulated gate bipolar transistor) drive circuit.The input of PWM output control circuit is connected to the output of digital signal processing unit, the output of PWM output control circuit is connected to the input of IGBT drive circuit, and the output of IGBT drive circuit is through being connected to the field circuit input of permanent magnetic actuator vacuum circuit breaker.
In such scheme, the circuit breaker displacement transducer in described circuit breaker displacement detecting unit adopts grating displacement sensor.
In such scheme, displacement signal change-over circuit in described circuit breaker displacement detecting unit is comprised of grating buffer circuit and signal conditioning circuit, the input connecting breaker displacement transducer of displacement signal change-over circuit, the output of circuit breaker displacement transducer connects the input of signal conditioning circuit, and the output of signal conditioning circuit connects the input of digital signal processing unit.
In such scheme, described digital signal processing unit consists of digital signal processing chip DSP 2812 and peripheral power supply circuit thereof.
In such scheme, the voltage transformer in described power network signal collecting unit is threephase potential transformer, and current transformer is threephase current transformer; The input of the circuit breaker displacement transducer of described circuit breaker displacement detecting unit is 3 tunnels, is arranged on respectively near the moving contact bindiny mechanism of every phase permanent magnetic actuator vacuum circuit breaker; The output of the IGBT drive circuit of described circuit breaker driver element is 3 tunnels, is connected to the field circuit input of every phase permanent magnetic actuator vacuum circuit breaker.
Compared with prior art, the utility model is based on the phase-controlled technology, and idle-loaded switching-on is grid-connected constantly at the power network current zero crossing to allow transformer, fundamentally elimination magnetizing inrush current during transformer during no-load closing; Adopt the moving contact of monitoring permanent-magnet pole vacuum circuit-breaker in real time, change the field circuit size of current and control operating mechanism, improved control precision; Adopt the closed-loop control control mode, moving contact motion locus is followed the tracks of, the branch wire time error is remained in less scope; Utilize fuzzy PID algorithm, adjust voluntarily the curve movement of following the tracks of moving contact, do not need each adjusting, when obtaining better effect, realized the self adaptation adjusting.
The accompanying drawing explanation
Fig. 1 is the theory diagram that a kind of vacuum circuit-breaker based on DSP selects phase operative intelligence controller.
The process flow block diagram that Fig. 2 is digital signal processing unit.
Embodiment
A kind of vacuum circuit-breaker selects phase operative intelligence controller, as shown in Figure 1, comprises power network signal collecting unit, circuit breaker displacement detecting unit, environmental detection unit, digital signal processing unit and circuit breaker driver element.The three-phase voltage signal that wherein electrical network collection signal circuit gathers electrical network, three-phase current signal connects the input of signal process part, by digital signal processing unit to its digital processing.Circuit breaker displacement detecting element output signal is connected to the input of digital signal processing unit, and digital signal processing unit is to displacement, the rate signal collection of the moving contact of breaker line number word processing of going forward side by side.The environmental detection unit output voltage signal is connected to the input of digital signal processing unit, and digital signal processing unit is by the temperature information collection line number word processing of going forward side by side.Digital signal processing unit carries out digital operation by the three-phase voltage signal, three-phase current signal, moving contact of breaker displacement, rate signal, the temperature signal that receive, and the output time signal is to the circuit breaker driver element.The output of digital signal processing unit is connected to the input of circuit breaker driver element, the circuit breaker driver element is converted to the signal of telecommunication by the time signal doped, output to the field circuit of permanent magnetic actuator vacuum circuit breaker, make the closing coil energising, control the permanent magnetic actuator vacuum circuit breaker moving contact and move under the reservation condition.
Above-mentioned power network signal collecting unit comprises voltage transformer, current transformer, simple modulate circuit and A/D change-over circuit.Voltage transformer is connected in parallel on the three-phase voltage test side of electrical network, and current transformer directly is connected on the three-phase current detection end of electrical network, gathers electrical network three-phase voltage current signal.Voltage current transformer is converted to six road weak electric signals by electrical network three-phase voltage signal three-phase current signal, then enters simple modulate circuit.Simple modulate circuit carries out simple filtering to the weak electric signal of voltage transformer summation current transformer output, and, to weak electric signal phase compensation, six road signals of simple modulate circuit output enter the A/D change-over circuit.The A/D change-over circuit adopts six road conversion chip AD7656 ，Jiang six road signals to be converted to the accessible 3.3V digital signal of DSP2812, and signal outputs to the input of digital signal processing unit.
Above-mentioned circuit breaker displacement detecting unit comprises circuit breaker displacement transducer and displacement signal change-over circuit.The circuit breaker displacement transducer adopts grating displacement sensor, be arranged on the magnetic mechanism vacuum circuit-breaker moving contact bindiny mechanism near, detect displacement and the speed of moving contact, produce the two-way orthogonal signalling, the output of grating displacement sensor is connected to the input of displacement signal change-over circuit.The displacement signal change-over circuit is comprised of grating buffer circuit and signal conditioning circuit, the displacement signal change-over circuit passes through the grating Isolation input in signal conditioning circuit by the two-way orthogonal signalling signal of displacement sensing output, by modulate circuit, orthogonal signalling are changed, the digital signal that the output digit signals processing unit can receive, the output of displacement signal change-over circuit is to the input of digital signal processing unit.
Above-mentioned environmental detection unit comprises temperature sampling circuit and signaling conversion circuit.Temperature sampling circuit adopts integrated temperature sensor, by the conversion of proximity to circuit breakers temperature signal, is output as current signal, and the output of temperature sampling is connected to the input of signaling conversion circuit.Signaling conversion circuit is converted to the receivable voltage signal of output digit signals processing unit by the current signal of temperature sampling output, and the output of signaling conversion circuit is to the input of digital signal processing unit.
Above-mentioned digital signal processing unit consists of digital signal processing chip DSP 2812 and peripheral power supply circuit thereof, the handling process of digital signal processing unit as shown in Figure 2, comprise sample rate current zero crossing confirmation link, tc compensation link, circuit breaker Displacement Feedback adaptive control link.Overall procedure is: at first carry out current zero-crossing point and confirm link, then tc compensation link and circuit breaker Displacement Feedback adaptive control link are carried out jointly, obtain output signal and are connected to the input of circuit breaker driver element.The sample rate current zero crossing confirms that link comprises FIR filtering, zero crossing confirmation and is scheduled to the moving contact velocity of displacement, after digital signal processing unit receives the three-phase voltage current signal of power network signal collecting unit output, at first pass through FIR filtering, obtain current zero-crossing point constantly by algorithm again, finally predetermined moving contact velocity of displacement.The tc compensation link, for the output signal of environmental detection unit is carried out to tc compensation, compensates to circuit breaker Displacement Feedback adaptive control link.Circuit breaker Displacement Feedback adaptive control link comprises the velocity of displacement feedback, fuzzy is controlled, the moving contact displacement speed of adjusting amount, after the orthogonal signalling of circuit breaker displacement detecting unit output and prearranged signals feedback, enter the fuzzy PID algorithm controlling unit, the signal of circuit breaker driver element is controlled in output, the speed displacement amount that prearranged signals obtains while being the rear permanent magnetic actuator vacuum circuit breaker action of last regulation and control, when initial, prearranged signals is the ideal velocity displacement.
Above-mentioned circuit breaker driver element comprises PWM output control circuit and IGBT drive circuit.The input of PWM output control circuit is connected to the output of digital signal processing unit, the circuit breaker time prediction signal of digital signal processing unit output outputs to the PWM output control circuit, control the IGBT drive circuit by the PWM output control circuit, the output of IGBT drive circuit is connected on the field circuit of permanent magnetic actuator vacuum circuit breaker, it is closing coil that the IGBT drive circuit directly drives permanent magnetic actuator vacuum circuit breaker field circuit input, makes the operating mechanism action.
Voltage transformer in power network signal collecting unit described in the utility model is threephase potential transformer, and current transformer is threephase current transformer; The input of the circuit breaker displacement transducer of described circuit breaker displacement detecting unit is 3 tunnels, is arranged on respectively near the moving contact bindiny mechanism of every phase permanent magnetic actuator vacuum circuit breaker; The output of the IGBT drive circuit of described circuit breaker driver element is 3 tunnels, is connected to the field circuit input of every phase permanent magnetic actuator vacuum circuit breaker.At collection terminal, the power network signal collecting unit gathers three-phase voltage signal, current signal totally six road power network signals, exports six tunnel out of phase sinusoidal signals; Environmental detection unit gathers three road temperature signals, output conversion Guo tri-road voltage signals; Circuit breaker displacement detecting unit mainly gathers the light signal of monitoring grating displacement sensor, output conversion Guo tri-road voltage signals.At control end, the power network signal collecting unit gathers the every phase voltage current signal of three-phase, the every phase displacement signal of circuit breaker displacement detecting unit inspection three-phase breaker, environmental detection unit and detects the every phase actuating of three-phase breaker structural environment situation, digital signal processing unit and carry out mutually independent digital operation and process three-phase is every respectively, and the circuit breaker driver element is to the every phase circuit-breaker switching on-off of three-phase coil drive.
During the utility model work, each link circuit is Real-time Collection, and once, controller gathers circular treatment once to the every action of permanent magnetic actuator vacuum circuit breaker.
In the utility model when work,, when the power network current signal zero crossing is confirmed, gather respectively mains voltage signal and current signal, by two kinds of signal zero crossings confirmations, can obtain more accurately current signal zero crossing.Digital signal processing unit adopts the FIR filter, and advantage is simple operations, effective, and phase error is definite value.Digital signal processing unit adopts fuzzy to control, and can realize the parameter of traditional PI D is regulated voluntarily by fuzzy adaptive algorithm, has the tracing property of having followed.The circuit breaker driver element adopts IGBT to control, and can better control be arranged to closing coil.
In the utility model when work,, permanent magnetic actuator vacuum circuit breaker is three-phase breaker, often carries out divide-shut brake by divide-shut brake coil separately respectively mutually.The every phase signals of controller reception & disposal three phase network, receive the every phase powder operation device of three-phase permanent mechanism vacuum circuit-breaker ambient temperature signal, accept the every phase displacement signal of three-phase permanent mechanism movable contact of vacuum circuit breaker, digital signal processing unit is processed every phase sampler current zero-crossing point and is confirmed link, tc compensation link, the every phase drive control signal of circuit breaker displacement detecting fuzzy controlling unit output circuit breaker, and drive circuit drives the every phase divide-shut brake of permanent magnetic actuator vacuum circuit breaker coil.
Claims (5)
1. vacuum circuit-breaker selects phase operative intelligence controller, it is characterized in that: mainly power network signal collecting unit, circuit breaker displacement detecting unit, environmental detection unit, digital signal processing unit and circuit breaker driver element, consist of, wherein
Above-mentioned power network signal collecting unit comprises voltage transformer, current transformer, simple modulate circuit and A/D change-over circuit; Voltage transformer is connected in parallel on the electrical network sampling end, current transformer is connected on the electrical network sampling end, the output of voltage transformer summation current transformer all is connected to the input of simple modulate circuit, the output of simple modulate circuit is linked into the input of A/D change-over circuit, and the output of A/D change-over circuit is connected to the input of digital signal processing unit;
Above-mentioned circuit breaker displacement detecting unit comprises circuit breaker displacement transducer and displacement signal change-over circuit; The circuit breaker displacement transducer is arranged near the moving contact bindiny mechanism of permanent magnetic actuator vacuum circuit breaker, the output of circuit breaker displacement transducer is linked into the input of displacement signal change-over circuit, and displacement signal change-over circuit output connects the input of digital signal processing unit;
Above-mentioned environmental detection unit comprises temperature sampling sensor and signaling conversion circuit; The output of temperature sampling sensor is linked into the input of signaling conversion circuit, and the output of signaling conversion circuit is linked into the input of digital signal processing unit;
Above-mentioned circuit breaker driver element comprises PWM output control circuit and IGBT drive circuit; The input of PWM output control circuit is connected to the output of digital signal processing unit, the output of PWM output control circuit is connected to the input of IGBT drive circuit, and the output of IGBT drive circuit is through being connected to the field circuit input of permanent magnetic actuator vacuum circuit breaker.
2. vacuum circuit-breaker selects phase operative intelligence controller according to claim 1, it is characterized in that: the circuit breaker displacement transducer in described circuit breaker displacement detecting unit adopts grating displacement sensor.
3. select phase operative intelligence controller according to the described vacuum circuit-breaker of claim 1 or 2, it is characterized in that: the displacement signal change-over circuit in described circuit breaker displacement detecting unit is comprised of grating buffer circuit and signal conditioning circuit, the input connecting breaker displacement transducer of displacement signal change-over circuit, the output of circuit breaker displacement transducer connects the input of signal conditioning circuit, and the output of signal conditioning circuit connects the input of digital signal processing unit.
4. vacuum circuit-breaker selects phase operative intelligence controller according to claim 1, it is characterized in that: described digital signal processing unit consists of digital signal processing chip DSP 2812 and peripheral power supply circuit thereof.
5. vacuum circuit-breaker selects phase operative intelligence controller according to claim 1, it is characterized in that: the voltage transformer in described power network signal collecting unit is threephase potential transformer, and current transformer is threephase current transformer; The input of the circuit breaker displacement transducer of described circuit breaker displacement detecting unit is 3 tunnels, is arranged on respectively near the moving contact bindiny mechanism of every phase permanent magnetic actuator vacuum circuit breaker; The output of the IGBT drive circuit of described circuit breaker driver element is 3 tunnels, is connected to the field circuit input of every phase permanent magnetic actuator vacuum circuit breaker.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320369226 CN203352193U (en) | 2013-06-26 | 2013-06-26 | Intelligent controller of vacuum circuit breaker phase selection operation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320369226 CN203352193U (en) | 2013-06-26 | 2013-06-26 | Intelligent controller of vacuum circuit breaker phase selection operation |
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| CN203352193U true CN203352193U (en) | 2013-12-18 |
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| CN 201320369226 Expired - Fee Related CN203352193U (en) | 2013-06-26 | 2013-06-26 | Intelligent controller of vacuum circuit breaker phase selection operation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762513A (en) * | 2013-12-26 | 2014-04-30 | 北京科锐配电自动化股份有限公司 | Intelligent hand cart breaker and intelligent switch cabinet provided with breaker |
| CN103971984A (en) * | 2014-05-30 | 2014-08-06 | 吉林瀚丰电气有限公司 | Intelligent vacuum circuit breaker |
| CN106444457A (en) * | 2016-11-10 | 2017-02-22 | 深圳市国立智能电力科技有限公司 | Permanent magnet vacuum circuit breaker control device |
| CN106712307A (en) * | 2017-03-23 | 2017-05-24 | 河北农业大学 | Dynamic time-delay sequence switch-on system and method for preventing bias current from damaging breaker |
| CN106886181A (en) * | 2017-03-07 | 2017-06-23 | 湖南大学 | A kind of urban track traffic power network Feeder Terminal Unit control method |
| CN113241284A (en) * | 2021-04-13 | 2021-08-10 | 山西长治贝克电气有限公司 | Intelligent permanent magnet vacuum circuit breaker for mine |
-
2013
- 2013-06-26 CN CN 201320369226 patent/CN203352193U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762513A (en) * | 2013-12-26 | 2014-04-30 | 北京科锐配电自动化股份有限公司 | Intelligent hand cart breaker and intelligent switch cabinet provided with breaker |
| CN103762513B (en) * | 2013-12-26 | 2016-09-14 | 北京科锐配电自动化股份有限公司 | A kind of intelligence handcart circuit breaker and install the intelligent switchboard system of this chopper |
| CN103971984A (en) * | 2014-05-30 | 2014-08-06 | 吉林瀚丰电气有限公司 | Intelligent vacuum circuit breaker |
| CN106444457A (en) * | 2016-11-10 | 2017-02-22 | 深圳市国立智能电力科技有限公司 | Permanent magnet vacuum circuit breaker control device |
| CN106886181A (en) * | 2017-03-07 | 2017-06-23 | 湖南大学 | A kind of urban track traffic power network Feeder Terminal Unit control method |
| CN106712307A (en) * | 2017-03-23 | 2017-05-24 | 河北农业大学 | Dynamic time-delay sequence switch-on system and method for preventing bias current from damaging breaker |
| CN106712307B (en) * | 2017-03-23 | 2023-05-23 | 河北农业大学 | Dynamic time delay sequential closing system and method for avoiding damage to circuit breaker by bias current |
| CN113241284A (en) * | 2021-04-13 | 2021-08-10 | 山西长治贝克电气有限公司 | Intelligent permanent magnet vacuum circuit breaker for mine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20140626 |
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| EXPY | Termination of patent right or utility model |