CN103580007A - Intelligent frame controller - Google Patents
Intelligent frame controller Download PDFInfo
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- CN103580007A CN103580007A CN201210258048.3A CN201210258048A CN103580007A CN 103580007 A CN103580007 A CN 103580007A CN 201210258048 A CN201210258048 A CN 201210258048A CN 103580007 A CN103580007 A CN 103580007A
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Abstract
The invention discloses an intelligent frame controller. The intelligent frame controller comprises a microprocessor, a signal acquisition circuit, a signal processing and CT detection circuit, a tripper, an execution mechanism, a magnetic flux detection circuit and two power supplies. The first power supply supplies power to the microprocessor and the signal processing and CT detection circuit, the signal acquisition circuit acquires real-time information of the execution mechanism, the output end of the signal acquisition circuit is connected with the signal processing and CT detection circuit in series and then connected with the input end of the tripper and the input end of the microprocessor, the second power supply supplies power to the tripper, the execution mechanism and the magnetic flux detection circuit, the output end of the tripper is connected with the input end of the execution mechanism, and the output end of the execution mechanism is connected with the magnetic flux detection circuit in series and then connected with the input end of the microprocessor. The intelligent frame controller is simple and practical in structure, low in cost, and easy to operate and maintain due to the fact that the controller is provided with an information acquisition system and an interaction operation interface, and real-time monitoring and protection can be achieved in an asynchronous communication mode.
Description
Technical field
The present invention relates to a kind of on-off controller, relate in particular to a kind of intelligent framework controller.
Background technology
Along with intelligentized development, intelligent controller arises at the historic moment, and it has replaced the controller that traditional mechanism is controlled, and has realized the intelligentized control of electric network protection.FKT400M Series Intelligent controller is the core component of frame-type intelligent controller, is mainly used in the electrical network of 50～60Hz.Protection when frame-type intelligent controller can be realized distribution, feed or generating, makes electrical network avoid the harm of overload, short circuit, ground connection etc.According to functional requirement, designed and measured demonstration and four distant (remote measurement, remote signalling, remote control, remote regulating) function, supported various protocols to adapt to different networking requirements.Wireless telecommunications are at present main flows of communications industry, if wireless communication technique can be applied on intelligent grid, will promote the revolutionization progress of intelligent power, the raising that brings matter to society and the people's life injustice.Current domestic intelligent electric appliance also, in developing the stage, only has a small amount of "smart" products, and its complex structure, and cost is higher.
Summary of the invention
The defect that the present invention seeks to exist for prior art provides a kind of intelligent framework controller.
The present invention for achieving the above object, adopts following technical scheme:
A kind of intelligent framework controller of the present invention, comprise microprocessor, signal acquisition circuit, signal is processed and CT testing circuit, release, actuator, flux detection circuit and two power supplys, wherein the first power supply provides power supply to respectively microprocessor and signal processing and CT testing circuit, signal acquisition circuit gathers the real time information of actuator, after the output serial connection signal processing of signal acquisition circuit and CT testing circuit, connect respectively the input of release and microprocessor, second source is given respectively release, actuator and flux detection circuit supply, the input of the output termination actuator of release, after the output serial connection flux detection circuit of actuator, connect the input of microprocessor.
Preferably, asynchronous communication module is also set on described microprocessor, described asynchronous communication module is connected in series asynchronous reception/dispensing device by insulating power supply module and forms, output, asynchronous reception/dispensing device and the microprocessor two-way communication of input termination first power supply of insulating power supply module.
Preferably, on described microprocessor, keyboard circuit is also set.
Preferably, on described microprocessor, display circuit is also set.
Preferably, described release be with MCR and the intelligent electrical apparatus release of HSISC functional circuit.
Controller architecture of the present invention is simple and practical, and cost is low, adopts asynchronous communication means to monitor in real time and to protect, and has information acquisition system and interactive operation interface, easy operating and maintenance.
Accompanying drawing explanation
Fig. 1: structure principle chart of the present invention.
Fig. 2: three-pole breaker (3P) schematic diagram.
Fig. 3: four-pole circuit breaker (4P) schematic diagram.
Fig. 4: the external N utmost point of three-pole breaker instrument transformer (3P+N) schematic diagram.
Fig. 5: earth-current detects schematic diagram.
Embodiment
As shown in Figure 1, a kind of intelligent framework controller of the present invention, comprise microprocessor, signal acquisition circuit, signal is processed and CT testing circuit, release, actuator, flux detection circuit and two power supplys, wherein the first power supply provides power supply to respectively microprocessor and signal processing and CT testing circuit, signal acquisition circuit gathers the real time information of actuator, after the output serial connection signal processing of signal acquisition circuit and CT testing circuit, connect respectively the input of release and microprocessor, second source is given respectively release, actuator and flux detection circuit supply, the input of the output termination actuator of release, after the output serial connection flux detection circuit of actuator, connect the input of microprocessor.
Preferably, asynchronous communication module is also set on described microprocessor, described asynchronous communication module is connected in series asynchronous reception/dispensing device by insulating power supply module and forms, output, asynchronous reception/dispensing device and the microprocessor two-way communication of input termination first power supply of insulating power supply module.
Preferably, on described microprocessor, keyboard circuit is also set.
Preferably, on described microprocessor, display circuit is also set.
Preferably, described release be with MCR and the intelligent electrical apparatus release of HSISC functional circuit.
Controller of the present invention mainly carries out with current parameters; for realizing the fail safe of electrical network; therefore make its main protection to electrical network comprise overload long delay protection, short circuit short time-delay protection, short circuit instantaneous protection, ground protection, MCR function, out-of-limit protection, neutral pole protection etc., all types of design functions refer to table 1.
Table 1 design function table
In electrical network, generally exist overload; short circuit; ground connection etc. make power network current produce phenomenon that unexpected change diminishes greatly or unbalanced; at this moment need electrical network protection to prevent the phenomenons such as electric wire heating fusing; therefore adopt the protection of overload long delay protection short circuit short time-delay, short circuit instantaneous protection, ground protection, neutral pole protection etc., these chapters and sections make an explanation to each defencive function and the design of each parameter.
Overload long delay protection function is generally used for the overload to electrical network and protects, and very effectively (RMS) of protection based on electric current, adopts inverse time protection characteristic.Long delay protection operating characteristics is as shown in table 2:
Table 2 overload long delay protection characteristic
Short circuit short time-delay protection is mainly used to protect the resistance short circuit of distribution system, and because this type of short circuit generally occurs in part, electric current is greater than overload protection constant value, but is not very large, adopts the selective protection (short circuit short time-delay) with delay function therefore general.This protection is based on electric current real effective, and protection is divided into two sections: inverse time lag and specified time, protective feature is as shown in table 3.Two kinds of modes of short circuit short time-delay: inverse time protection and definite time protection
Inverse time protection: when fault current surpasses short time delay current value (Isd) and be less than inverse time lag current value (for long delay limit value multiple 8IR), press short circuit short time-delay curve characteristic expression formula and calculate inverse time-lag value operate time.
Definite time protection: when fault current surpasses short time delay current value (Isd) and is less than inverse time lag current value (long delay limit value multiple 8IR), controller carries out delay protection by specified time delayed setting value.
Table 3 short circuit short time-delay protective feature
Instantaneous protection is mainly used in preventing the solid short circuit of power distribution network, and this type of fault is generally alternate short circuit, and short circuit current is very large, disconnect fast.This protection is protected based on current instantaneous value, and operating characteristics is as table 4.
Table 4 short circuit instantaneous protection operating characteristics
For Single Phase Metal earth fault protection, there are two kinds of protected modes: residual current (difference) type (T) and earth-current (W).T-shaped detection phase-sequence current, gets the vector of four phases (3 phase 4 line systems) or three-phase (3 phase 3 line systems) electric current and protects.Earth-current type is by the electric current on special outside instrument transformer direct-detection earth cable, can protect the superior and the subordinate's earth fault of circuit breaker simultaneously, and the ultimate range of instrument transformer and circuit breaker is no more than 10 meters.Ground protection operating characteristics:
Ground protection parameter as shown in table 5 and protection operating characteristics.
Table 5 ground protection operating characteristics and parameter
It is as follows that the present invention detects principle:
(1), difference type (vector mode): different according to number of poles, be divided into 3 utmost points (3P), 4 utmost points (4P), 3 utmost points+N utmost point (3P+N), connected mode (is noted: under 3P+N mode as shown in Figure 2, Figure 3, Figure 4, N phase instrument transformer is external, therefore need to limit the length of instrument transformer connecting line, generally can not surpass 2m).
(2), earth-current mode: detect the electric current on transformer neutral point earth connection, be used as earth current, (note: earth current instrument transformer is external, because it is ribbon core instrument transformer, therefore the suitable long point of connecting line is less than in 10m) as shown in Figure 5
Cable and current characteristics neutral mutually used in practical application usually have very big difference with other three-phases, therefore need to implement mutually different protections for different applicable cases centerings.When the neutral line is thinner, can adopt the method protection of half definite value; When the neutral line and other are mutually the same, can adopt the mode of full definite value to protect.
The protection definite values such as neutral pole protective current definite value and overload long delay, short circuit short time-delay, short circuit are instantaneous are relevant.For example, when overload occurs neutral pole, if selective protection (0.5 times), neutral pole current ration is half of overload long delay protection, and the rest may be inferred for other.As shown in table 6 is neutral pole protection operating characteristics.
Table 6 neutral pole protection operating characteristics
Intelligent controller needs the electric parameter of measurements and calculations power distribution network, realizes the functions such as various protections, warning, detection, control according to these electric parameters.With regard to measuring-signal, mainly comprise the real effective of electric current and voltage, main performance index is as follows:
Measure content:
Three-phase current real effective: IA, IB, IC;
N phase current real effective: IN(notes: for 3P without N phase current IN);
Earth current effective value: IG;
Three-phase voltage real effective: UA, UB, UC or UAB, UBC, UCA
Measuring range:
IA, IB, IC, IN are 25 times of rated current (different according to shell frame electric current, ultimate breaking capacity exists different, should get among 25In and limit breaking current less one);
IG is that 10 times of rated current (are noted: maximum 1600A)
UA, UB, UC(or UAB, UBC, UCA) measuring range is 80-400V
Certainty of measurement:
Current measurement precision: be that ± 2.5%, 2In is ± 5% above within the scope of 1.5In
Voltage measurement precision: ± 2.5%
Metering system:
IA, IB, IC, IN, IG calculate show value according to the real effective of electric current (RMS)
UA, UB, UC(or UAB, UBC, UCA) real effective (RMS) calculating show value
1.3.2MCR with HSISC defencive function
MCR and HSISC protection are the high speed instantaneous protections carrying out for circuit breaker itself; When out-of-limit fault current produces, controller can send trip command in 10ms.Wherein MCR protection is protected the making capacity of circuit breaker, prevents that closing of power circuit breaker from surpassing the electric current of connecting limit capacity and protecting, and prevents that switch from carrying the electric current of the ability that oversteps the extreme limit, and works after combined floodgate 100ms.Instrument transformer and protection range characteristic are in Table 7.
Table 7 instrument transformer and protection range characteristic
HSISC and MCR function directly drive release by hardware circuit.
Note: this group set point generally fits over circuit breaker while dispatching from the factory, and according to the breaking capacity of circuit breaker, sets.End user is non-adjustable.
For preventing repeatedly unacceptable or overload periodically, controller also records the thermal effect of load current, when the thermal effect of overload accumulation reaches predeterminated level, priming is threaded off.Thermal capacitance variation pattern is determined by selected curve.
Except EI(M) all curves the special fast inverse time lag (electric motor protecting), thermal capacitance is just won when current measurement value is greater than 1.1Ir to be increased; After circuit breaker is because of overload or inverse time lag short trouble tripping operation or return to non-overload from overload, thermal capacity is pressed exponential law and is decayed.User can set thermal capacitance: instantaneous, 10 minutes, 20 minutes upper, 30 minutes, 45 minutes, 1 hour, 2 hours, 3 hours.
For the protection of spy's motor of fast inverse time lag, can not set cooling time, and thermal capacitance is changing along with the variation of electric current always.
When controller does not access accessory power supply, if after switch motion, close a floodgate immediately by thermal capacitance that previous electric current produces all defendant ignore.Be that reclosing makes controller re-power reset, thermal capacitance reverts to zero.
Pair of switches amount input/output interface is set, is used as region linkage state input (from the interlocking signal of other circuit breaker) or sends interlocking signal to other circuit breaker.
RS-485 interface (Modbus-RTU agreement):
1) communication interface mode: isolated form half-duplex RS-485;
2) address: 1-247;
9.6,19.2,38.4kbps 3) communication speed:;
4) communications protocol: Modbus-RTU;
This equipment can be realized short distance four remote control function: remote control, remote signalling, remote measurement, remote regulating.
Self-fault diagnosis shows that different code represents dissimilar fault, specifically in Table 8.
Table 8 Self-fault diagnosis reveal codes
Note: a plurality of faults occur simultaneously; The very first time that priority is high is carried out this defencive function; The failure code that simultaneously shows this protection.
FKT400M Series Intelligent controller can be recorded a failure logging of nearest protection action, and the reason occurring for analysis of failure, as table 9.This intelligent controller can be write down with the form of logout the information of the event of failures such as dropout, warning, and can keep not losing after power down, so that inquiry afterwards, as table 10.
Table 9 fault and maintenance
Table 10 protection and type of alarm
Controller (is only carried out type for tripping operation to protection) when sending dropout (tripping operation) control signal, will record reason and the relevant information of this dropout, and this controller maximum can record 1 time nearest dropout record, and each record comprises:
Dropout type: the type of the event of threading off (comprising separate),
(noting: consider separate factor, type with separately separated processing, each may occur some type mutually).
Dropout time delay: recognize fault to formally sending the time of threading off between order, the S of chronomere.
Dropout numerical value: the numerical value that sends the order Protection parameters constantly of threading off.
Claims (5)
1. an intelligent framework controller, it is characterized in that comprising microprocessor, signal acquisition circuit, signal is processed and CT testing circuit, release, actuator, flux detection circuit and two power supplys, wherein the first power supply provides power supply to respectively microprocessor and signal processing and CT testing circuit, signal acquisition circuit gathers the real time information of actuator, after the output serial connection signal processing of signal acquisition circuit and CT testing circuit, connect respectively the input of release and microprocessor, second source is given respectively release, actuator and flux detection circuit supply, the input of the output termination actuator of release, after the output serial connection flux detection circuit of actuator, connect the input of microprocessor.
2. a kind of intelligent framework controller according to claim 1, it is characterized in that also arranging on described microprocessor asynchronous communication module, described asynchronous communication module is connected in series asynchronous reception/dispensing device by insulating power supply module and forms, output, asynchronous reception/dispensing device and the microprocessor two-way communication of input termination first power supply of insulating power supply module.
3. a kind of intelligent framework controller according to claim 1, is characterized in that also arranging on described microprocessor keyboard circuit.
4. a kind of intelligent framework controller according to claim 1, is characterized in that also arranging on described microprocessor display circuit.
5. a kind of intelligent framework controller according to claim 1, it is characterized in that described release for MCR and the intelligent electrical apparatus release of HSISC functional circuit.
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| CN201210258048.3A CN103580007A (en) | 2012-07-25 | 2012-07-25 | Intelligent frame controller |
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| CN201210258048.3A CN103580007A (en) | 2012-07-25 | 2012-07-25 | Intelligent frame controller |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338940A (en) * | 2016-09-13 | 2017-01-18 | 许昌许继低压电器有限公司 | Intelligent framework controller |
| CN108597963A (en) * | 2018-06-07 | 2018-09-28 | 上海英铎飞电子科技有限公司 | Air switch |
| CN110970878A (en) * | 2019-12-24 | 2020-04-07 | 宁夏凯晨电气集团有限公司 | Method for improving band-limited time current quick-break precision based on mean filtering |
| EP4175094A1 (en) * | 2021-10-29 | 2023-05-03 | Eaton Intelligent Power Limited | Electronic trip unit with thermal capacity measurement and display |
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| US6141197A (en) * | 1998-03-10 | 2000-10-31 | General Electric Company | Smart residential circuit breaker |
| CN2901655Y (en) * | 2005-11-15 | 2007-05-16 | 天津市百利电气有限公司 | Breaker with MCR and HSISC function realizing circuit |
| CN101552458A (en) * | 2008-12-29 | 2009-10-07 | 浙江中凯科技股份有限公司 | Protective circuit of a control and protection switch |
| CN101950713A (en) * | 2010-09-14 | 2011-01-19 | 河北宝凯电器有限公司 | Small intelligent circuit breaker convenient for adjusting |
-
2012
- 2012-07-25 CN CN201210258048.3A patent/CN103580007A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6141197A (en) * | 1998-03-10 | 2000-10-31 | General Electric Company | Smart residential circuit breaker |
| CN2901655Y (en) * | 2005-11-15 | 2007-05-16 | 天津市百利电气有限公司 | Breaker with MCR and HSISC function realizing circuit |
| CN101552458A (en) * | 2008-12-29 | 2009-10-07 | 浙江中凯科技股份有限公司 | Protective circuit of a control and protection switch |
| CN101950713A (en) * | 2010-09-14 | 2011-01-19 | 河北宝凯电器有限公司 | Small intelligent circuit breaker convenient for adjusting |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338940A (en) * | 2016-09-13 | 2017-01-18 | 许昌许继低压电器有限公司 | Intelligent framework controller |
| CN108597963A (en) * | 2018-06-07 | 2018-09-28 | 上海英铎飞电子科技有限公司 | Air switch |
| CN110970878A (en) * | 2019-12-24 | 2020-04-07 | 宁夏凯晨电气集团有限公司 | Method for improving band-limited time current quick-break precision based on mean filtering |
| CN110970878B (en) * | 2019-12-24 | 2022-03-04 | 宁夏凯晨电气集团有限公司 | Method for improving band-limited time current quick-break precision based on mean filtering |
| EP4175094A1 (en) * | 2021-10-29 | 2023-05-03 | Eaton Intelligent Power Limited | Electronic trip unit with thermal capacity measurement and display |
| US11817693B2 (en) | 2021-10-29 | 2023-11-14 | Eaton Intelligent Power Limited | Electronic trip unit with thermal capacity measurement and display |
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Application publication date: 20140212 |