CN102024363B - Simulated training system of load breaker - Google Patents
Simulated training system of load breaker Download PDFInfo
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- CN102024363B CN102024363B CN2010106176108A CN201010617610A CN102024363B CN 102024363 B CN102024363 B CN 102024363B CN 2010106176108 A CN2010106176108 A CN 2010106176108A CN 201010617610 A CN201010617610 A CN 201010617610A CN 102024363 B CN102024363 B CN 102024363B
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Abstract
The invention relates to a simulated training system of a load breaker, comprising a three-phase four-wire program control voltage source, wherein the output of the voltage source is connected with a leakage current, an overload protection device, an isolation transformer, ammeters of all phases and an isolation switch in turn. The output end of the isolation switch is connected with a simulated load circuit, the simulated load circuit comprises a current relay controller and a three-phase four-wire load breaker, and the input end of the three-phase four-wire load breaker is correspondingly connected with the isolation switch. By using the system, the requirement on the training and the verification of related equipment can be met, trainees can study the use of the related equipment in a realer environment, and acquaint operation processes and protection, thereby facilitating system verification work and training assessment.
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 specific electric load, and when reaching the trip protection state, implement the training system of protection.
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, the load isolating switch is very important equipment.Because correlation technique is maked rapid progress, the kind form of load isolating switch is also various day by day, and the use training and the detection check of the isolating switch of how loading are the task of top priority.
Summary of the invention
The purpose of this invention is to provide a kind of load isolating switch simulation training system; Can satisfy relevant device training and and the calibrating; Operating process and protection are familiar with in the use that makes the student in real more environment, learn relevant device, make things convenient for system's calibration operation and training and examination.
For realizing above-mentioned purpose; Scheme of the present invention is: load isolating switch simulation training system; Comprise the three-phase and four-line program-controlled voltage source; This voltage source output is connected with leakage current, overload protection arrangement, isolating transformer, each phase current table and disconnector in turn, and the output terminal of said disconnector 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.
The student learns the relevant knowledge of load isolating switch 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.The artificial load circuit is set, different load currents is 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.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.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.
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.
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.
The simulation training system of a kind of isolating switch training that is used to load 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 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.
The output terminal of disconnector 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 (5)
1. load isolating switch simulation training system; It is characterized in that; Comprise the three-phase and four-line program-controlled voltage source; This voltage source output is connected with leakage current overload protection arrangement, isolating transformer, each phase current table and disconnector in turn, and the output terminal of said disconnector 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.
2. load isolating switch simulation training system according to claim 1 is characterized in that said artificial load circuit also is provided with virtual load current source holding circuit.
3. load isolating switch simulation training system according to claim 2; 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.
4. load isolating switch simulation training system according to claim 2; 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.
5. according to each described load isolating switch simulation training system among the claim 1-4, 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106176108A CN102024363B (en) | 2010-12-31 | 2010-12-31 | Simulated training system of load breaker |
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| CN2010106176108A CN102024363B (en) | 2010-12-31 | 2010-12-31 | Simulated training system of load breaker |
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| CN102024363A CN102024363A (en) | 2011-04-20 |
| CN102024363B true CN102024363B (en) | 2012-08-22 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103576006A (en) * | 2012-07-18 | 2014-02-12 | 上海宝钢工业技术服务有限公司 | Conductor overload body feeling tester |
| CN103077631B (en) * | 2012-11-22 | 2015-01-21 | 郑州万特电气有限公司 | Training device for three-phase circuit breaker spring operation mechanism |
| CN103077632B (en) * | 2012-11-22 | 2015-01-21 | 郑州万特电气有限公司 | Isolation disconnecting link electric operating mechanism training device |
| CN104575203A (en) * | 2015-01-06 | 2015-04-29 | 国家电网公司 | Three-level residual current operated protection simulated practice training system |
| CN107492291A (en) * | 2017-10-16 | 2017-12-19 | 广东电网有限责任公司佛山供电局 | A kind of load condition analogue means |
| CN111381156B (en) * | 2020-03-27 | 2022-07-05 | 嘉捷鑫源(北京)科技有限公司 | Distribution room circuit breaker load energy consumption abnormity monitoring method, device, equipment and readable storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201203987Y (en) * | 2008-03-05 | 2009-03-04 | 李瑞生 | Experimental equipment for teaching power system automation and relay protection |
| CN201955987U (en) * | 2010-12-31 | 2011-08-31 | 郑州万特电气有限公司 | Simulation training system for load circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201203987Y (en) * | 2008-03-05 | 2009-03-04 | 李瑞生 | Experimental equipment for teaching power system automation and relay protection |
| CN201955987U (en) * | 2010-12-31 | 2011-08-31 | 郑州万特电气有限公司 | Simulation training system for load circuit breaker |
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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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