CN202548237U - Simulated device for overload protection of series capacitors of fault current limiters (FCL) - Google Patents
Simulated device for overload protection of series capacitors of fault current limiters (FCL) Download PDFInfo
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- CN202548237U CN202548237U CN2012201352644U CN201220135264U CN202548237U CN 202548237 U CN202548237 U CN 202548237U CN 2012201352644 U CN2012201352644 U CN 2012201352644U CN 201220135264 U CN201220135264 U CN 201220135264U CN 202548237 U CN202548237 U CN 202548237U
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Abstract
The utility model discloses a simulated device for overload protection of series capacitors of fault current limiters (FCL), belongs to the field of electrical measurement and in particular relates to a simulated testing device for emergent protection circuit devices which are used for limiting over-current or over-voltage without cutting off circuits. The device comprises first, second and third current comparators, first, second and third AND gates and a set of logical judgment circuits, wherein the input terminals of the current comparators and the AND gates are respectively connected with the current signal input terminal and an inverse time limit operation condition signal input terminal; and the output terminals of the current comparators and the AND gates are connected with an AND gate circuit and the logical judgment circuits composed of first and second OR gate circuits. The device can truly simulate and reflect the overload protection condition of series capacitors of FCL devices and provide corresponding simulation effects for the study or design of FCL devices. The device has the advantages of cross-platform simulated tests and is capable of realization in real environment by actual elements and realization in virtual environment by computer software.
Description
Technical field
The utility model belongs to the electric measurement field, relates in particular to a kind ofly to be used to limit excess current or superpotential and not cut off the simulation testing device of the emergency protective circuit device of circuit.
Background technology
The continuous growth of electricity needs has caused transmission system to develop to the direction of long distance, high capacity and high stability.The safe and stable operation of electric system is the important prerequisite of national economy sustainable development.
Short trouble is to jeopardize power system safety and stability to move one of common faults the most.
In recent years, along with the continuous reinforcement of China's electric network composition, short circuit current level is constantly soaring.The many areas particularly short circuit current level of coastal economy developed regions electrical network have been approached even have been surpassed its switch rupturing capacity, and operation brings big pressure to power system safety and stability, and has become one of main bottleneck of power network development.
In order to keep stable transmission of electricity, the short trouble protection is very important fast.General mechanical chopper cutting-off of short-circuit electric current needs two or more cycles, comprises the actuation time of relay protection, and can shorten the emergency protection time with the fast current restraint device that isolating switch uses.
Series resonance-type fault current limiter (Fault Current Limiter; FCL) principle is as shown in Figure 1, and it mainly is made up of reactor L, capacitor C and quick by-pass switch K (can adopt switch or its combination like types such as thyristor, sparking distance, quick mechanical switchs).
Wherein, the power frequency induction reactance of reactor L is identical with the capacitive reactance size of capacitor C.Under the normal running conditions, K switch is in open mode (thyristor is in blocking state), and capacitor C and inductance L are in the power frequency series resonance state, and total impedance is zero.After detecting fault, K switch rapid closing (the quick conducting of thyristor), electric capacity is played metering function by bypass thereby be equivalent to insert inductance L in the line.
Except above-mentioned primary equipment, short trouble detects diagnosis and triggers control system also is the important component part of fault demand limiter.Measuring the control protection system is the system that the fault current limiter main equipment is measured automatically, controlled and protects, and this system accomplishes to the measurement of the main electric parameters of FCL device and running status, to the control of running status, to the monitoring and the protection of main equipment.Measure the control protection system and carry out redundant configuration, and have self check and self-diagnostic function self and external interface loop by dualization principle.The configuration of this two cover system is identical, independent operating, hot redundant standby each other.Every cover system comprises complete measurement, control, protection, supervision, signalling arrangement, all can independent startup, move and withdraw from.Therefore, the cover failover in measuring the control protection system withdraws from, another set of system still can guarantee the FCL device normal input, move and withdraw from.
In the research or the design phase of FCL device, must make an experiment and emulation to said system, and with reference to test and simulation result, to the foundation of studying or result of design is verified or conduct is revised.
The utility model content
The purpose of the utility model is that a kind of FCL series capacitance overload protection simulator will be provided; It can simulate the FCL series capacitance overload protection situation of reflection FCL device truly; For the research or the design of FCL device provides corresponding simulation result, solve the technical matters that research or design for the FCL device provide verification platform.
The utility model solves the problems of the technologies described above the technical scheme that is adopted:
A kind of FCL series capacitance overload protection simulator, comprise first to the 3rd with the door and first OR circuit, it is characterized in that:
Described first to the 3rd with the door an input end, be connected respectively to A, B, C three-phase inverse time-delay operation conditioned signal input end;
Described first to the 3rd with the output terminal of door, be connected respectively to an input end of first OR circuit;
Described first output terminal to OR circuit constitutes the protection output terminal of said FCL series capacitance overload protection simulator.
A kind of optimized technical scheme of the FCL series capacitance overload protection simulator of the utility model; It is characterized in that also comprising the alarm output unit; Described alarm output unit comprises first to the 3rd current comparator, the 4th to the 6th with the door, second OR circuit and a chronotron; The in-phase input end of described first to the 3rd current comparator is connected respectively to A, B, C three-phase capacitor current signal input end; The inverting input of described first to the 3rd current comparator is parallel-connected to protective current value input end; The output terminal of described first to the 3rd current comparator, a corresponding respectively input end that is connected to the 4th to the 6th AND circuit; The output terminal of described the 4th to the 6th AND circuit is connected respectively to an input end of second OR circuit; The output terminal of described second OR circuit is connected to the input end of chronotron; The time-delay output terminal of said chronotron constitutes the alarm output terminal of said FCL series capacitance overload protection simulator.
A kind of preferable technical scheme of the FCL series capacitance overload protection simulator of the utility model is characterized in that described FCL series capacitance overload protection simulator also is provided with the Simulation Control switch; An input end of first to the 6th AND circuit is parallel-connected to an end of said Simulation Control switch, and the other end of described Simulation Control switch connects the external emulation control signal.
A kind of better technical scheme of the FCL series capacitance overload protection simulator of the utility model is characterized in that described current comparator is the integrated comparator circuit; Described AND circuit and OR circuit and chronotron are logical integrated circuits.
A kind of improved technical scheme of the FCL series capacitance overload protection simulator of the utility model is characterized in that described current comparator, AND circuit and OR circuit and chronotron are the inner programmed logical module of chip microprocessor.
The beneficial effect of the utility model is:
1. can simulate, reflect the series capacitance overload protection situation of FCL device truly, for the research or the design of FCL device provides corresponding simulation result;
2. whole simulation device logical relation is succinct, and reliable in action is easy to realize;
3. the advantage that has cross-platform emulation testing both can realize with actual components in true environment, can in virtual environment, realize with computer software again.
Description of drawings
Fig. 1 is the fundamental diagram of series resonance-type fault current limiter;
Fig. 2 is the main circuit diagram of the FCL series capacitance overload protection simulator of the utility model;
Fig. 3 is the logical relation synoptic diagram of the FCL series capacitance overload protection simulator of the utility model;
The above label of each parts among the figure: 11-13 is first to the 3rd current comparator, 21-23 be first to the 3rd with door, 31-33 is the 4th to the 6th AND circuit, 41-42 is first to second OR circuit.
Embodiment
In order to understand the technique scheme of the utility model better, be explained in further detail below in conjunction with accompanying drawing and embodiment.
Fig. 2 is the main circuit diagram of the FCL series capacitance overload protection simulator of the utility model; Comprise first to the 3rd with door 21-23 and first OR circuit 41; First to the 3rd with the door 21-23 an input end, be connected respectively to A, B, C three-phase inverse time-delay operation conditioned signal input end Pa, Pb and Pc; First to the 3rd with the output terminal 21-23 of door, be connected respectively to an input end of first OR circuit 41; First output terminal to OR circuit 41 constitutes the protection output terminal Lout of said FCL series capacitance overload protection simulator.
In the embodiment of the FCL of the utility model shown in Figure 2 series capacitance overload protection simulator; Also comprise the alarm output unit; Described alarm output unit comprises first to the 3rd current comparator 11-13, the 4th to the 6th with a door 31-33, second OR circuit 42 and chronotron 51; The in-phase input end of first to the 3rd current comparator 11-13 is connected respectively to A, B, C three-phase capacitor current signal input end Ia, Ib and Ic; The inverting input of first to the 3rd current comparator 11-13 is parallel-connected to protective current value input end Ipset; The output terminal of first to the 3rd current comparator 11-13, a corresponding respectively input end that is connected to the 4th to the 6th AND circuit 31-33; The output terminal of the 4th to the 6th AND circuit 31-33 is connected respectively to an input end of second OR circuit 42; The output terminal of second OR circuit 42 is connected to the input end of chronotron 51; The time-delay output terminal of chronotron 51 constitutes the alarm output terminals A out of said FCL series capacitance overload protection simulator.
In the FCL of the utility model shown in Figure 1 series capacitance overload protection simulator; Also be provided with the Simulation Control K switch; First to the 6th AND circuit 21-23 and 31-33 respectively get an input end; Be connected to an end of said Simulation Control K switch after being connected in parallel, the other end of Simulation Control K switch connects the external emulation control signal.
The FCL series capacitance overload protection simulator of the utility model can adopt the side circuit element to realize that for example, first to the 3rd current comparator 11-13 can adopt dual comparator integrated circuit MC393; First to the 6th AND circuit 21-23 and 31-33 can adopt 2 input ends four and door integrated circuit 7408; First to the second OR circuit 41-42 can adopt 3 input ends three or door integrated circuit 4075, and chronotron 51 can adopt any integrated circuit chronotron.
Among Fig. 3, provided the logical relation synoptic diagram of this device, clearly; Realize or come all can realize its logical relation or logic function with actual electrical sub-element (true environment), that is to say the FCL series capacitance overload protection simulator of the utility model with computer software (virtual environment); Can also use chip microprocessor programming simulation to realize; Perhaps, according to logical organization shown in Figure 3, in virtual environment, simulate and realize with computer software.
Because the series capacitance overload protection action situation of FCL device can be simulated, reflected to the utility model truly; In true environment (realizing) or virtual environment (realizing), all can realize with computer software with actual components; For FCL unit protection system provides the triggering criterion of series capacitance overload protection action, but and its result of the action of emulation.Therefore, the utility model can be widely used in FCL unit protection systematic research, design, manufacturing field.
Those of ordinary skill in the art will be appreciated that; Above embodiment only is the technical scheme that is used for explaining the utility model; And be not the qualification that is used as the utility model; Any connotation based on the utility model is to variation, modification that the above embodiment did, all will drop in the protection domain of claim of the utility model.
Claims (5)
1. FCL series capacitance overload protection simulator, comprise first to the 3rd with the door and first OR circuit, it is characterized in that:
Described first to the 3rd with the door an input end, be connected respectively to A, B, C three-phase inverse time-delay operation conditioned signal input end;
Described first to the 3rd with the output terminal of door, be connected respectively to an input end of first OR circuit;
Described first output terminal to OR circuit constitutes the protection output terminal of said FCL series capacitance overload protection simulator.
2. FCL series capacitance overload protection simulator according to claim 1; It is characterized in that also comprising the alarm output unit; Described alarm output unit comprises first to the 3rd current comparator, the 4th to the 6th with the door, second OR circuit and a chronotron; The in-phase input end of described first to the 3rd current comparator is connected respectively to A, B, C three-phase capacitor current signal input end; The inverting input of described first to the 3rd current comparator is parallel-connected to protective current value input end; The output terminal of described first to the 3rd current comparator, a corresponding respectively input end that is connected to the 4th to the 6th AND circuit; The output terminal of described the 4th to the 6th AND circuit is connected respectively to an input end of second OR circuit; The output terminal of described second OR circuit is connected to the input end of chronotron; The time-delay output terminal of said chronotron constitutes the alarm output terminal of said FCL series capacitance overload protection simulator.
3. FCL series capacitance overload protection simulator according to claim 2 is characterized in that described FCL series capacitance overload protection simulator also is provided with the Simulation Control switch; An input end of first to the 6th AND circuit is parallel-connected to an end of said Simulation Control switch, and the other end of described Simulation Control switch connects the external emulation control signal.
4. according to claim 1,2 or 3 described FCL series capacitance overload protection simulators, it is characterized in that described current comparator is the integrated comparator circuit; Described AND circuit and OR circuit are the Digital Logic integrated circuit.
5. according to claim 1,2 or 3 described FCL series capacitance overload protection simulators, it is characterized in that described current comparator, AND circuit and OR circuit are the inner programmed logical module of chip microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201352644U CN202548237U (en) | 2012-04-01 | 2012-04-01 | Simulated device for overload protection of series capacitors of fault current limiters (FCL) |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201352644U CN202548237U (en) | 2012-04-01 | 2012-04-01 | Simulated device for overload protection of series capacitors of fault current limiters (FCL) |
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| CN202548237U true CN202548237U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201352644U Expired - Lifetime CN202548237U (en) | 2012-04-01 | 2012-04-01 | Simulated device for overload protection of series capacitors of fault current limiters (FCL) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332975A (en) * | 2014-10-28 | 2015-02-04 | 上海南自科技股份有限公司 | Networked mining advanced switch comprehensive protection measuring and controlling device |
| CN108519891A (en) * | 2018-03-15 | 2018-09-11 | 中广核工程有限公司 | A kind of nuclear power plant equipment structure preferred embodiment and processing method |
-
2012
- 2012-04-01 CN CN2012201352644U patent/CN202548237U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332975A (en) * | 2014-10-28 | 2015-02-04 | 上海南自科技股份有限公司 | Networked mining advanced switch comprehensive protection measuring and controlling device |
| CN104332975B (en) * | 2014-10-28 | 2020-03-27 | 上海南自科技股份有限公司 | Network type mining high-opening comprehensive protection measurement and control device |
| CN108519891A (en) * | 2018-03-15 | 2018-09-11 | 中广核工程有限公司 | A kind of nuclear power plant equipment structure preferred embodiment and processing method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121121 |