CN203101558U - Fault screening device for electric equipment - Google Patents
Fault screening device for electric equipment Download PDFInfo
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- CN203101558U CN203101558U CN 201320090733 CN201320090733U CN203101558U CN 203101558 U CN203101558 U CN 203101558U CN 201320090733 CN201320090733 CN 201320090733 CN 201320090733 U CN201320090733 U CN 201320090733U CN 203101558 U CN203101558 U CN 203101558U
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Abstract
The utility model relates to a fault screening device for electric equipment. The fault screening device comprises a monitored detection electric signal for marking fault information, a fault detection circuit used for filtering a high-frequency part from the detection electric signal to obtain a filtered detection electric signal, a comparison circuit comprising a comparator, a voltage division resistor unit and an adjustable resistor, a programmable logic module used for comparing a monitoring signal output by the comparator in the comparison circuit with a standard value and filtering an interference signal to judge if a system has a fault, a fault displaying circuit connected to the programmable logic module and comprising a light-emitting diode and a resistor R5 and used for displaying if the fault is existent currently, a latch-up module connected to the programmable logic module and used for driving an execution mechanism to stop the system, and a processor module connected to the programmable logic module. The fault screening device can be used for not only achieving fault monitoring of an active power filter, but also filtering false fault signals, and further improving the reliability and stability of the system.
Description
Technical field
The utility model relates to a kind of power equipment fault screening plant, belongs to electric power control field.
Background technology
The generally use of power electronic equipment and nonlinear load makes harmonic current and reactive current inject electrical network in a large number, and the safe operation of serious threat electrical network and electrical equipment is used with normal, carries out filtering and compensate more and more being paid attention to by people to harmonic wave is idle.Active Power Filter-APF is preferably one of the selection that improves the quality of power supply, therefore develops very fast.Active Power Filter-APF is the power electronic equipment of a kind of dynamic inhibition harmonic wave and compensating reactive power, it can be to frequency and big or small harmonic wave and idle the compensating that all changes, can remedy the shortcoming of passive filter, acquisition is a kind of desirable compensation harmonic device than the better compensation characteristic of passive filter.
But Active Power Filter-APF often breaks down and tends to break down, and has potential safety hazard, even set up the equipment of monitor for faults, also can break down, thereby cause a large amount of spurious glitches to produce, and has wasted resource and human cost greatly.
Summary of the invention
The purpose of this utility model provides a kind of power equipment fault screening plant, and this fault screening plant had both been realized the monitoring to the Active Power Filter-APF fault, again can filtering spurious glitches signal, further improved the reliability and stability of system.
For achieving the above object, the technical solution adopted in the utility model is: a kind of power equipment fault screening plant comprises comprising the detection electric signal of monitored sign failure message:
Failure detector circuit, the HFS that is used for the described detection electric signal of filtering obtains to detect electric signal after the filtering, comprises the operational amplifier of the conduct isolation that is connected in series and the High frequency filter unit of being made up of R4 resistance and electric capacity;
Comparator circuit, comprise comparer, divider resistance unit and adjustable resistance, input end of comparer connects described adjustable resistance, detects electric signal after being used to receive the filtering from failure detector circuit, another input end of comparer connects described divider resistance unit, is used to receive reference value;
Be set with the programmed logical module of standard value, be used for pilot signal and standard value from the output of comparator circuit comparer are compared, filtering interference signals, thus judge whether system exists fault;
Fault display circuit is connected to described programmed logical module, comprises light emitting diode and R5 resistance, is used to show the current fault that whether exists;
Lock modules is connected to described programmed logical module, quits work thereby be used to drive the system that makes of topworks;
Processor module is connected to described programmed logical module, according to the time that the signal from programmed logical module continues, and failure judgement width and type, thus correspondingly drive described fault display circuit and lock modules.
Further improved plan is as follows in the technique scheme:
1, in the such scheme, described divider resistance unit comprises R1 resistance, R2 resistance and R3 resistance, and R1 resistance and R2 resistance string are coupled between 5 volts of power supplys and the ground connection, and the cross-over connection of described R3 resistance is between the contact and ground connection of adjustable resistance and comparer.
2, in the such scheme, a reset switch that is used to reset is connected to described programmed logical module, is used for the switching of high and low level.
Because the technique scheme utilization, the utility model compared with prior art has following advantage and effect:
The utility model power equipment fault screening plant, it had both realized the monitoring to the Active Power Filter-APF fault, again can filtering spurious glitches signal, further improved the reliability and stability of system, also improved efficient, avoided the waste of a large amount of manpowers.
Description of drawings
Accompanying drawing 1 is the utility model power equipment fault screening plant electrical schematic diagram;
Accompanying drawing 2 is a failure detector circuit structural representation in the utility model fault screening plant;
Accompanying drawing 3 is a comparator circuit structural representation in the utility model fault screening plant;
Accompanying drawing 4 is a reset switch structural representation in the utility model fault screening plant;
Accompanying drawing 5 is the utility model fault display circuit structural representation;
Accompanying drawing 6 is judged synoptic diagram for the utility model signal;
Accompanying drawing 7 is the utility model fault screening plant workflow diagram.
In the above accompanying drawing: 1, failure detector circuit; 2, operational amplifier; 3, electric capacity; 4, comparator circuit; 5, comparer; 6, divider resistance unit; 7, adjustable resistance; 8, programmed logical module; 9, fault display circuit; 91, light emitting diode; 10, lock modules; 11, processor module; 12,5 volts of power supplys; 13, reset switch.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment: a kind of power equipment fault screening plant comprises comprising the detection electric signal of monitored sign failure message:
Failure detector circuit 1, the HFS that is used for the described detection electric signal of filtering obtains to detect electric signal after the filtering, comprises the operational amplifier 2 of the conduct isolation that is connected in series and the High frequency filter unit of being made up of R4 resistance and electric capacity 3;
Comparator circuit 4, comprise comparer 5, divider resistance unit 6 and adjustable resistance 7,5 one input ends of comparer connect described adjustable resistance 7, detect electric signal after being used to receive filtering from failure detector circuit 1, comparer 5 another input ends connect described divider resistance unit 6, are used to receive reference value;
Be set with the programmed logical module 8 of standard value, be used for pilot signal and standard value from 5 outputs of comparator circuit 4 comparers are compared, filtering interference signals, thus judge whether system exists fault;
Fault display circuit 9 is connected to described programmed logical module 8, comprises light emitting diode 91 and R5 resistance, is used to show the current fault that whether exists;
Lock modules 10 is connected to described programmed logical module 8, quits work thereby be used to drive the system that makes of topworks;
Processor module 11 is connected to described programmed logical module 8, according to the time that the signal from programmed logical module 8 continues, and failure judgement width and type, thus correspondingly drive described fault display circuit 9 and lock modules 10.
Above-mentioned divider resistance unit 6 comprises R1 resistance, R2 resistance and R3 resistance, and R1 resistance and R2 resistance string are coupled between 5 volts of power supplys 12 and the ground connection, and the cross-over connection of described R3 resistance is between the contact and ground connection of adjustable resistance 7 and comparer 5.
One reset switch that is used to reset 13 is connected to described programmed logical module 8, is used for the switching of high and low level.
Above-mentioned fault screening plant is further described below.
Fault-signal compares with comparator circuit 4 through failure detector circuit 1, produces square-wave waveform and enters programmed logical module 8(CPLD), in CPLD, judge the true and false of signal.
The explanation that accompanying drawing 1 is more complete the overall picture that constitutes of this fault screening plant, the fault that at first gets the wrong sow by the ear if there is fault to drive lock modules 10 operations, shows concrete fault, notification processor module 11 is determined next step operation scheme.It can be manually that fault resets, and also can automatically reset.
General undesired signal different shape has, and is the example explanation for convenience of description with the pulse signal, and pulse width is very narrow, and energy is low.If real direct current overvoltage; to export low level reliably through comparator circuit; and top signal has the false fault-signal generation of of short duration low level through becoming one behind the comparator circuit, like this at DC circuit emergency protection characteristics, in programmed logical module 8 this signal shielding is fallen.Other type signal also can similar like this processing.
Block diagram illustrating: at first judge whether to exist fault, if exist fault to count (width that is used for failure judgement).If counting illustrates then that greater than setting value (every class fault is different, and it is fixed separately specifically to need) fault is true fault, carry out associative operation, otherwise this signal of ignoring.
When adopting above-mentioned power equipment with the fault screening plant, its its both realized monitoring to the Active Power Filter-APF fault, again can filtering spurious glitches signal, further improved the reliability and stability of system, also improve efficient, avoided the waste of a large amount of manpowers.
The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.
Claims (3)
1. power equipment fault screening plant comprises it is characterized in that the detection electric signal of monitored sign failure message: comprising:
Failure detector circuit (1), the HFS that is used for the described detection electric signal of filtering obtains to detect electric signal after the filtering, comprises the operational amplifier (2) of the conduct isolation that is connected in series and the High frequency filter unit of being made up of R4 resistance and electric capacity (3);
Comparator circuit (4), comprise comparer (5), divider resistance unit (6) and adjustable resistance (7), (5) input ends of comparer connect described adjustable resistance (7), detect electric signal after being used for receiving filtering from failure detector circuit (1), another input end of comparer (5) connects described divider resistance unit (6), is used to receive reference value;
Be set with the programmed logical module (8) of standard value, be used for pilot signal and standard value from comparator circuit (4) comparer (5) output are compared, filtering interference signals, thus judge whether system exists fault;
Fault display circuit (9) is connected to described programmed logical module (8), comprises light emitting diode (91) and R5 resistance, is used to show the current fault that whether exists;
Lock modules (10) is connected to described programmed logical module (8), quits work thereby be used to drive the system that makes of topworks;
Processor module (11), be connected to described programmed logical module (8), according to the time that the signal from programmed logical module (8) continues, failure judgement width and type, thus correspondingly drive described fault display circuit (9) and lock modules (10).
2. fault screening plant according to claim 1, it is characterized in that: described divider resistance unit (6) comprises R1 resistance, R2 resistance and R3 resistance, R1 resistance and R2 resistance string are coupled between 5 volts of power supplys (12) and the ground connection, and the cross-over connection of described R3 resistance is between the contact and ground connection of adjustable resistance (7) and comparer (5).
3. fault screening plant according to claim 1 is characterized in that: a reset switch that is used to reset (13) is connected to described programmed logical module (8), is used for the switching of high and low level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320090733 CN203101558U (en) | 2013-02-28 | 2013-02-28 | Fault screening device for electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320090733 CN203101558U (en) | 2013-02-28 | 2013-02-28 | Fault screening device for electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203101558U true CN203101558U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320090733 Expired - Lifetime CN203101558U (en) | 2013-02-28 | 2013-02-28 | Fault screening device for electric equipment |
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| Country | Link |
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| CN (1) | CN203101558U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459401A (en) * | 2014-12-08 | 2015-03-25 | 重庆跃达电力设备有限公司 | Signal displaying device of power monitoring system |
| CN104198854B (en) * | 2014-08-29 | 2016-09-28 | 国家电网公司 | A kind of online Branch Type Contingency screening and ranking method |
| CN109510518A (en) * | 2017-09-15 | 2019-03-22 | 伊利诺斯工具制品有限公司 | The braking system of electromagnetic machine |
| CN111856173A (en) * | 2019-04-26 | 2020-10-30 | 中国北方车辆研究所 | Fault detection device and method for electromagnetic compatibility system |
| CN112886713A (en) * | 2021-04-09 | 2021-06-01 | 国网河北省电力有限公司沧州供电分公司 | Power grid emergency control method based on shore-based power supply offshore oil field group |
-
2013
- 2013-02-28 CN CN 201320090733 patent/CN203101558U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198854B (en) * | 2014-08-29 | 2016-09-28 | 国家电网公司 | A kind of online Branch Type Contingency screening and ranking method |
| CN104459401A (en) * | 2014-12-08 | 2015-03-25 | 重庆跃达电力设备有限公司 | Signal displaying device of power monitoring system |
| CN109510518A (en) * | 2017-09-15 | 2019-03-22 | 伊利诺斯工具制品有限公司 | The braking system of electromagnetic machine |
| CN111856173A (en) * | 2019-04-26 | 2020-10-30 | 中国北方车辆研究所 | Fault detection device and method for electromagnetic compatibility system |
| CN111856173B (en) * | 2019-04-26 | 2023-07-25 | 中国北方车辆研究所 | Fault detection device and method for electromagnetic compatibility system |
| CN112886713A (en) * | 2021-04-09 | 2021-06-01 | 国网河北省电力有限公司沧州供电分公司 | Power grid emergency control method based on shore-based power supply offshore oil field group |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |
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| CX01 | Expiry of patent term |