CN102024364B - Simulated training system - Google Patents
Simulated training system Download PDFInfo
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- CN102024364B CN102024364B CN 201010617642 CN201010617642A CN102024364B CN 102024364 B CN102024364 B CN 102024364B CN 201010617642 CN201010617642 CN 201010617642 CN 201010617642 A CN201010617642 A CN 201010617642A CN 102024364 B CN102024364 B CN 102024364B
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Abstract
The invention relates to a simulated training system comprising a three-phase four-wire program control voltage source. The output of the three-phase four-wire program control voltage source is successively connected with a leakage current and overload protection device, an isolation transformer, ampere meters of various phases and an isolating switch, wherein the output end of the isolating switch is connected with a simulated aftercurrent circuit which is composed of an aftercurrent protector, a dial switch and a leakage current load box, and the aftercurrent protector, the dial switch, the leakage current load box and the aftercurrent protector are successively connected in series; three groups of switch input ends of the dial switch are respectively and correspondingly connected with a three-phase output end of the aftercurrent protector; three groups of switch output ends of the dial switch are respectively and correspondingly connected with a three-phase load of the leakage current load box; the three-phase load is connected in a star shape; and a neutral point is connected to the neutral line of the input end of the aftercurrent protector. The system can satisfy the requirements of the training and the verification of relevant equipment, students can learn to use the relevant equipment in a realer environment and know the operation process and protection well, which is convenient for system verification work and training examination.
Description
Technical field
The present invention relates to a kind of simulation training system that the electrician is giveed training of being used for, particularly a kind of analog subscriber circuit residual current and load, and when reaching the trip protection state, implement protection training system.
Background technology
In the middle basic unit distribution substation (institute) of electric system; Staff such as power utility check person, distribution operation maintenance worker (transformer and distribution station worker on duty), distribution test check man, rural power grids distribution business worker, relay protection worker, DC equipment check man, the debugging and maintenance person of electric substation, electric measuring instrument worker are equipped with; In order to guarantee the safe and stable operation of transformer station (institute), need carry out technical training to it.
In general, give the explanation (explanation, picture, multimedia teaching) that at first must carry out theoretical property training, and then carry out emulation,, temper its manipulative ability so that deepen student's understanding.But existing emulator is less analogue system and reality system equipment very big difference is arranged, can not understand in depth between performance index, technical parameter and the system thereof of each equipment and the cooperation of other equipment and interrelated.The training method theoretical property of utilizing this small-sized emulator is strong but lack the training of practical operative ability, makes result of training not good.If give training to the scene, can not guarantee again student's Personal Safety, but also maybe damage on-site equipment.
In the electric system, residual current operated protective device is very important equipment with the load isolating switch.Because correlation technique is maked rapid progress, residual current operated protective device is also various day by day with the kind form of load isolating switch, and the use training and the detection check of how to carry out residual current operated protective device and load isolating switch are the task of top priority.
Summary of the invention
The purpose of this invention is to provide simulation training system, can satisfy relevant device training and and calibrating, make the student can be in real more environment the use of study relevant device, be familiar with operating process and protection, make things convenient for system's calibration operation and training and examination.
For realizing above-mentioned purpose; Scheme of the present invention is: simulation training system; Comprise the three-phase and four-line program-controlled voltage source; The output of this voltage source is connected with leakage current, overload protection arrangement, isolating transformer, each phase current table and disconnector in turn, and the disconnector output terminal connects an emulation residual current circuit, and residual current operated protective device, toggle switch, leakage current load box that this emulation residual current circuit is established by string successively constitute; The corresponding respectively three-phase output end that connects residual current operated protective device of three groups of switch input terminals of toggle switch; The corresponding respectively threephase load that connects the leakage current load box of three groups of output switching terminals of toggle switch, this threephase load is Y-connection, and neutral point is connected to the neutral input terminal line of residual current operated protective device.Toggle switch adopts the toggle switch dish.
The student learns the relevant knowledge of residual current operated protective device under true environment, carry out actual rehearsal, carries out normalizing operation according to real distribution system, and is even like this in the system of reality, also no longer strange.Through being set, different residual currents lets the principle of work and the operation condition of the clearer understanding residual current operated protective device of student; Display window through observing residual current operated protective device and pilot lamp can make the faster more accurate separate leakage current when being the residual current operated protective device action that finds leakage current of student.Make the student understand in depth, analyze; Improve the level of skill of investigation, solution fault; Improve the ability of coping with contingencies, post integrated service level and the on-the-spot practical operation level of power utility check personnel, distribution operation maintenance worker (to transformer and distribution station worker on duty), distribution being tested relevant work post personnel such as check man, rural power grids distribution business worker, electric energy metrical personnel all have a distinct increment.Certainly this experience system can also be used as examination, contest and technical appraisement except doing the skills training.
Further, the output terminal of said disconnector also connects an artificial load circuit, and this artificial load circuit comprises the three-phase and four-line load isolating switch of an electric current relay controller and a corresponding connection with disconnector of input end; All be connected with corresponding virtual load current source branch mutually between every phase input end of said load isolating switch and the output terminal; Be provided with the current sensor of corresponding phase in the corresponding loop that constitutes mutually of said virtual load current source branch and load isolating switch, said virtual load current source branch comprises: the virtual load current source of series connection and at least one normally open contact of corresponding control contactor mutually; Said electric current relay controller comprises A, B, C three-phase current relay; The input end of each phase current relay connects the current sensor of said corresponding phase; The contact of each phase current relay and corresponding control contactor coil (J1 mutually; J2, J3) series arm of series connection formation connects and is located between corresponding phase output terminal of load isolating switch and the neutral line output terminal.
Further, said artificial load circuit also is provided with virtual load current source holding circuit.
Further, said virtual load current source holding circuit comprises: be serially connected with the coil (J4) of a protection contactor and the auxiliary normally closed interlock (K33) of said arbitrary control contactor mutually between a wherein phase input end of said load isolating switch and the neutral line input end; Said each phase virtual load current source respectively with three normally open contacts of said protection contactor (K41, K42, K43) corresponding parallel connection.
Further, said virtual load current source holding circuit comprises: be serially connected with the coil (J4) of a protection contactor and the normally closed interlock (K7) of an auxiliary reclay between a wherein phase input end of said load isolating switch and the neutral line input end; The coil of said auxiliary reclay (J7) is connected between load isolating switch output terminal and the neutral line output terminal, said each phase virtual load current source respectively with three normally open contacts of said protection contactor (K41, K42, K43) corresponding parallelly connected.
Further, the control contactor in the said virtual load current source branch has two normally closed interlocks, is connected to the two ends of virtual load current source.
Increased the artificial load circuit, different load currents has been set, let the student clearly understand the principle of work and the operation condition of load isolating switch through the virtual load current source; Through each parameter of isolating switch is set, let the student grasp the setting of the various parameters of isolating switch, through observing each state of isolating switch, let the student better grasp the real meaning of the various state indications of isolating switch.Native system is applicable to various residual current operated protective devices and load isolating switch, satisfies the apparatus adaptability requirement of many kinds, many specifications, many producers.
Description of drawings
Fig. 1 is a system diagram of the present invention;
Fig. 2 is load isolating switch C circuitry phase schematic diagram A;
Fig. 3 is load isolating switch C circuitry phase schematic diagram B.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
A kind of simulation training system that is used for residual current operated protective device and the training of load isolating switch as shown in Figure 1; Comprise the three-phase and four-line program-controlled voltage source; This voltage source output is connected with leakage current, overload protection arrangement (integrated protection plate among the figure), isolating transformer, each phase current table and disconnector in turn; The disconnector output terminal connects an emulation residual current circuit; This emulation residual current circuit constitutes the corresponding respectively three-phase output ends that connect residual current operated protective devices of three groups of switch input terminals of toggle switch, the corresponding respectively threephase loads that connect the leakage current load boxs of three groups of output switching terminals of toggle switch by residual current operated protective device, toggle switch, the leakage current load box established of string successively; This threephase load is Y-connection, and neutral point is connected to the neutral input terminal line of residual current operated protective device.
The low voltage electric network electric power system of analogue system simulation three-phase and four-line of the present invention neutral-point solid ground; Adopt the protected mode of TN-C; Be that internal system adopts zero connection protection; And the mode of the neutral line and protective wire unification, the cooperation earth leakage protective device (I n>=30mA, time≤0.1S) The Realization of Simulation safeguard protection; When maloperation caused short circuit, then by earth leakage protective device (the integrated protection plate comprises voltage-type earth leakage protective device, current mode overload protective device among the figure), total air switch and protective tube etc. were handled; System has the voltage-type earth leakage protective device, prevents casing charged (constantly detect the voltage between casing and the zero line, will cut off the electricity supply and report to the police greater than 5V); System has current mode overload protective device (can regulate the protection value as required); System has the lock-in circuit of cutting off the electricity supply of reporting to the police, and guarantees operator's personal safety, has also guaranteed the safety of equipment simultaneously; System adopts isolating transformer, guarantees personal safety.Isolating transformer can detect the working current in the whole circuit in real time to three reometers between the disconnector.Residual current operated protective device is the effective facility that prevents that personal electric shock, electrical fire and electrical equipment from damaging as a kind of protection electrical equipment.Residual current operated protective device adopts the protected mode of cutting off the electricity supply automatically.In protection against direct contact, be used to prevent the supplementary protection of the basic safeguard measure of shock hazard, electrical equipment exposes when in protection against indirect contact, being used to prevent earth fault, conductive part has dangerous voltage lastingly and cause electrical shock hazard or the sustained arc electric current causes electrical fire harm.
The emulation principle of emulation residual current circuit is following: through controlling the different ohmic loads that insert in above-mentioned toggle switch each loop to residual current operated protective device, realize the generation of residual current with this.When residual current transfinites, residual current operated protective device just can move.
Through observation to residual current operated protective device charactron display window; Residual current when the duty, phase shortage ground current that can judge the current residual current protector changes cause that residual current transfinites separate, residual current operated protective device action etc., thus reach the principle of work that lets the student be familiar with residual current operated protective device, operation condition, and the display window through observing residual current operated protective device and the next accurate failure judgement of each pilot lamp separate how.
The output terminal of disconnector also connects an artificial load circuit; This artificial load circuit comprises an electric current relay controller and a corresponding three-phase and four-line load isolating switch that is connected with disconnector of input end, and the load breaker protection adopts the protected mode of cutting off the electricity supply automatically.When load surpasses the normal electrical flow valuve that is provided with, the isolating switch action power dump.
All be connected with corresponding virtual load current source branch mutually between every phase input end and the output terminal of load isolating switch; Virtual load current source branch and load isolating switch corresponding constitutes loop (be breaker closing after current return) mutually, is provided with the current sensor of corresponding phase in the loop.The virtual load current source branch comprises: (K31, K32), two contacts are connected to the two ends of virtual load current source to two normally open contacts of the virtual load current source of series connection and corresponding control contactor mutually.
Said electric current relay controller comprises A, B, C three-phase current relay (JK4; JK5; JK6); The input end of each phase current relay connects the current sensor (tie point is like label
among the figure ...
) of corresponding phase; The contact of each phase current relay and corresponding control contactor coil (J1 mutually; J2, J3) series arm of series connection formation connects and is located between corresponding phase output terminal of load isolating switch and the neutral line output terminal.
System as shown in Figure 1 because the circuit structure of each phase is basic identical, is that example specifies with C below mutually, and is as shown in Figure 2:
Be connected with C virtual load current source branch mutually between input end C and the output terminal C ' of load isolating switch; Current source circuit constitutes C closing circuit mutually with isolating switch; The virtual load current source branch of C phase comprises: two normally open contact (K31 of the virtual load current source of series connection and control contactor; K32), (K31 K32) is connected to the two ends of virtual load current source to two normally open contacts of control contactor.
Be serially connected with the coil J3 of control contactor and the normally closed interlock of C current relay JK6 mutually between load isolating switch output terminal C ' and the neutral line output terminal N '; The control section of C phase current relay J K6 is installed in the electric current relay controller; Input connects the C current in loop mutual inductor that closes a floodgate mutually; The electric current of sampling C phase closing circuit; When the electric current that flows through the C phase from having to nothing, the Single-chip Controlling current relay JK6 action in the electric current relay controller, its normally closed interlock breaks off.
The artificial load circuit also is provided with virtual load current source holding circuit, and this paper provides two kinds of implementations:
First kind of mode
As shown in Figure 2; Virtual load current source holding circuit comprises: be serially connected with the coil J4 of a protection contactor and the auxiliary normally closed interlock K33 of control contactor between a wherein phase of load isolating switch (be the C phase, A, B mutually can certainly) input end C and the neutral line input end N here; (K43) correspondence is parallelly connected for K41, K42 with three normally open contacts protecting contactor respectively for each phase virtual load current source.
The second way
As shown in Figure 3, virtual load current source holding circuit comprises: be serially connected with the coil J4 of a protection contactor and the normally closed interlock K7 of an auxiliary reclay between a wherein phase (C phase) the input end C of load isolating switch and the neutral line input end N; The coil J7 of auxiliary reclay is connected between load isolating switch output terminal and the neutral line output terminal, and (K43) correspondence is parallelly connected for K41, K42 with three normally open contacts protecting contactor respectively for each phase virtual load current source.
The effect that dual mode plays is identical, and promptly when separating brake, because J3 or J7 do not have electricity, K33 or K7 are closed, and J4 is charged, K41, K42, K43 adhesive, protection virtual load current source; During combined floodgate, K33 or K7 break off, the J4 dead electricity, and K41, K42, K43 break off, and protection virtual load current source inserts; During tripping operation, K33 or K7 closure are closed once more, and J4 is charged, K41, K42, K43 adhesive, protection virtual load current source.
Concrete emulation principle is (with first kind of mode is example, like Fig. 1) as follows: breaker closing, and under the normal condition, the coil J1 of control contactor, J2; J3 gets electric, their normally open contact K11, K12, K21, K22; K31, K32 is closed, and normally closed interlock K33 breaks off, the coil J4 dead electricity of protection contactor, its coil K41; K42, K43 breaks off, and in the virtual load current source place in circuit, through the different load current of control virtual load current source output, realizes the generation of load current with this.When electric current transfinites, tripping operation after will reporting to the police 5 minutes, no reclosing.During circuit breaker trip, single-chip microcomputer detects the electric current of isolating switch from having to nothing, Control current relay normally closed interlock JK4 immediately, JK5, JK6 tripping; Control contactor coil J3 dead electricity, normally closed interlock K33 adhesive, protective relay coil J4 gets electric, its coil K41, K42; Thereby K43 adhesive short circuit virtual load current source, thereby protected the virtual load current source, control contactor normally open contact K11, K12, K21; K22, K31, K32 is tripping also, protection load isolating switch.
Through the virtual load current source is set, and observe the various states of load isolating switch, judge the real-time working electric current in each loop, parameters such as each phase Control current reach with this and to let the student deepen the understanding to the load isolating switch, are familiar with its parameter and are provided with and operate.
Claims (6)
1. simulation training system; It is characterized in that; Comprise the three-phase and four-line program-controlled voltage source; The output of this voltage source is connected with leakage current overload protection arrangement, isolating transformer, each phase current table and disconnector in turn, and the disconnector output terminal connects an emulation residual current circuit, and residual current operated protective device, toggle switch, leakage current load box that this emulation residual current circuit is established by string successively constitute; The corresponding respectively three-phase output end that connects residual current operated protective device of three groups of switch input terminals of toggle switch; The corresponding respectively threephase load that connects the leakage current load box of three groups of output switching terminals of toggle switch, this threephase load is Y-connection, and neutral point is connected to the neutral input terminal line of residual current operated protective device.
2. simulation training system according to claim 1; It is characterized in that; The output terminal of said disconnector also connects an artificial load circuit, and this artificial load circuit comprises the three-phase and four-line load isolating switch of an electric current relay controller and a corresponding connection with disconnector of input end;
All be connected with corresponding virtual load current source branch mutually between every phase input end of said load isolating switch and the output terminal; Be provided with the current sensor of corresponding phase in the corresponding loop that constitutes mutually of said virtual load current source branch and load isolating switch, said virtual load current source branch comprises: the virtual load current source of series connection and at least one normally open contact of corresponding control contactor mutually;
Said electric current relay controller comprises A, B, C three-phase current relay; The input end of each phase current relay connects the current sensor of said corresponding phase; The contact of each phase current relay and corresponding control contactor coil (J1 mutually; J2, J3) series arm of series connection formation connects and is located between corresponding phase output terminal of load isolating switch and the neutral line output terminal.
3. simulation training system according to claim 2 is characterized in that, said artificial load circuit also is provided with virtual load current source holding circuit.
4. simulation training system according to claim 3; It is characterized in that said virtual load current source holding circuit comprises: be serially connected with the coil (J4) of a protection contactor and the auxiliary normally closed interlock (K33) of control contactor between a wherein phase input end of said load isolating switch and the neutral line input end; Said each phase virtual load current source respectively with three normally open contacts of said protection contactor (K41, K42, K43) corresponding parallel connection.
5. simulation training system according to claim 3; It is characterized in that said virtual load current source holding circuit comprises: be serially connected with the coil (J4) of a protection contactor and the normally closed interlock (K7) of an auxiliary reclay between a wherein phase input end of said load isolating switch and the neutral line input end; The coil of said auxiliary reclay (J7) is connected between load isolating switch output terminal and the neutral line output terminal, said each phase virtual load current source respectively with three normally open contacts of said protection contactor (K41, K42, K43) corresponding parallelly connected.
6. according to each described simulation training system among the claim 2-5, it is characterized in that the control contactor in the said virtual load current source branch has two normally closed interlocks, be connected to the two ends of virtual load current source.
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| CN 201010617642 CN102024364B (en) | 2010-12-31 | 2010-12-31 | Simulated training system |
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| CN 201010617642 CN102024364B (en) | 2010-12-31 | 2010-12-31 | Simulated training system |
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| CN102024364B true CN102024364B (en) | 2012-12-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102867453B (en) * | 2012-03-23 | 2014-12-24 | 郑州万特电气有限公司 | Practical training system and practical training control device for low-voltage capacitor box |
| CN104575203A (en) * | 2015-01-06 | 2015-04-29 | 国家电网公司 | Three-level residual current operated protection simulated practice training system |
| CN106532676A (en) * | 2017-01-06 | 2017-03-22 | 杨文强 | Magnetic induction ground blanking device |
| CN108988330B (en) * | 2018-08-01 | 2021-09-03 | 广东电网有限责任公司 | Power system simulation method considering electric arc of isolating switch fracture |
| CN113433421A (en) * | 2021-06-16 | 2021-09-24 | 江苏昂内斯电力科技股份有限公司 | Method for centrally monitoring residual current of power distribution system |
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| CN2713568Y (en) * | 2004-06-30 | 2005-07-27 | 伊洪良 | Senior electrician training and examining device |
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| CN201508645U (en) * | 2009-08-27 | 2010-06-16 | 北京市电力公司 | Low-voltage comprehensive fault simulation device |
| CN201955971U (en) * | 2010-12-31 | 2011-08-31 | 郑州万特电气有限公司 | Simulation training system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6717300B2 (en) * | 2000-07-24 | 2004-04-06 | Anadish Kumar Pal | Arrangement for using induction motor as a sensor to sense its own rotation when electrical power is not being supplied to it |
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|---|---|---|---|---|
| CN2713568Y (en) * | 2004-06-30 | 2005-07-27 | 伊洪良 | Senior electrician training and examining device |
| CN101316037A (en) * | 2007-05-29 | 2008-12-03 | 浙江正泰电器股份有限公司 | Aftercurrent action protector with self-diagnostic function |
| CN201508645U (en) * | 2009-08-27 | 2010-06-16 | 北京市电力公司 | Low-voltage comprehensive fault simulation device |
| CN201955971U (en) * | 2010-12-31 | 2011-08-31 | 郑州万特电气有限公司 | Simulation training system |
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| 刘四林等.浅谈剩余电流动作特性检测仪的校准方法.《计量与测试技术》.2009,第36卷(第5期),43-44，46. * |
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Owner name: ZHENGZHOU WONDER ELECTRICAL POWER CO., LTD. Free format text: FORMER NAME: ZHENGZHOU WONDER ELECTRIC CO., LTD. |
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Address after: High tech Development Zone, Henan 450001 road screen city of Zhengzhou Province, No. 15 Patentee after: Zhengzhou Wonder Electrical Power Co., Ltd. Address before: High tech Development Zone, Henan 450001 road screen city of Zhengzhou Province, No. 15 Patentee before: ZhengZhou Wonder Electric Co., Ltd. |
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Granted publication date: 20121205 Termination date: 20151231 |