CN105116259B - Actuation time detection device, the method and system of power protection unit - Google Patents
Actuation time detection device, the method and system of power protection unit Download PDFInfo
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- CN105116259B CN105116259B CN201510549089.1A CN201510549089A CN105116259B CN 105116259 B CN105116259 B CN 105116259B CN 201510549089 A CN201510549089 A CN 201510549089A CN 105116259 B CN105116259 B CN 105116259B
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Abstract
The invention discloses actuation time detection device, the method and system of a kind of power protection unit; it is related to technical field of electric power; described device includes: control unit, optocoupler transmit circuit, optocoupler reception circuit, short-circuiting device and magnet ring; the optocoupler transmit circuit, optocoupler receive circuit, short-circuiting device and magnet ring and connect with described control unit; the optocoupler transmit circuit is connect with the first end of protection device to be measured, and the optocoupler receives circuit and connect with the second end of the protection device to be measured.The present invention can determine that the protection device to be measured is acted from closed state to the actuation time of off-state by the inductive signal that the high-frequency signal and the magnet ring that receive circuit transmission by the optocoupler generate; detection process is simple; it is low in cost; and us grades of detection accuracy is realized, it can minute differences between distinguishing protection device.
Description
Technical field
The present invention relates to technical field of electric power, in particular to the actuation time detection device of a kind of power protection unit, side
Method and system.
Background technique
Electric system Electrical Safety is most important for everyone, when the improper electricity consumption of user, such as line short or
When person's load surcharge, power protection unit acts starting protection, prevents that unnecessary property is caused to damage because of improper electricity consumption
Mistake or casualties.
Consider that the time of protection act is that The faster the better certainly from electric system application angle.Caused by improper electricity consumption
Coverage is the smaller the better.According to a large amount of investigations to market historical product and existing power protection unit, electric power protection device
The actuation time parameter of part is developed from past several hundred ms orders of magnitude to tens ms, to several ms of today；Following development becomes
It will definitely be the power protection unit of faster movement speed.The quality assurance of power protection unit will be for entire electric system
The most important thing.If because individual power protection units are off quality or power protection unit between minute differences, all
It is possible that causing serious influence to electric system.
So it is higher and higher for the detection accuracy of power protection unit actuation time, but the detection essence of existing tester
Spending only can guarantee at ms grades, such as: it is high to be unable to satisfy test manufacture by breaker operating characteristic tester, temporal resolution 0.1ms
The demand of precision development.
Summary of the invention
To improve the detection accuracy to power protection unit, the present invention provides a kind of actuation times of power protection unit
Detection device, described device include: control unit, optocoupler transmit circuit, optocoupler reception circuit, short-circuiting device and magnet ring, the light
Coupling transmit circuit, optocoupler receive circuit, short-circuiting device and magnet ring connects with described control unit, the optocoupler transmit circuit and to
The first end connection of protection device is surveyed, the optocoupler receives circuit and connect with the second end of the protection device to be measured；
Described control unit, for generating high-frequency signal, by the high frequency signal transmission of generation to the optocoupler transmit circuit,
And short circuit pulse is sent to the short-circuiting device；
The optocoupler transmit circuit, for when the protection device to be measured is closed state, the high frequency received to be believed
It number is transmitted to the optocoupler and receives circuit and short-circuiting device；
The optocoupler receives circuit, for receiving the high-frequency signal transmitted by the optocoupler transmit circuit, by what is received
High frequency signal transmission is to described control unit；
The short-circuiting device, it is for when receiving short circuit pulse, the load of circuit where the protection device to be measured is short
Road, so that the protection device to be measured is acted from closed state to off-state；
The magnet ring, for generating when the short-circuiting device is by the load short circuits of circuit where the protection device to be measured
Inductive signal corresponding with the received high-frequency signal of the short-circuiting device, and the inductive signal of generation is transmitted to the control list
Member；
Described control unit is also used to determine the protector to be measured according to the high-frequency signal and inductive signal that receive
Part is acted from closed state to the actuation time of off-state.
Wherein, the optocoupler transmit circuit includes: the first photoelectrical coupler, the high frequency that the optocoupler transmit circuit receives
Signal passes through the input terminal of first photoelectrical coupler, is transmitted to the optocoupler from the output end of first photoelectrical coupler
Receive circuit.
Wherein, it includes the second photoelectrical coupler that the optocoupler, which receives circuit, and the optocoupler receives the high frequency that circuit receives
Signal passes through the input terminal of second photoelectrical coupler, is transmitted to the control from the output end of second photoelectrical coupler
Unit.
Wherein, described control unit is further used for the end time for the high-frequency signal that will be received and the sense received
Time difference between the initial time of induction signal acts moving to off-state from closed state as the protection device to be measured
Make the time.
Wherein, the load parallel connection of the short-circuiting device and protection device to be measured place circuit.
Wherein, the zero curve of circuit where the protection device to be measured is arranged on the magnet ring.
Wherein, the optocoupler transmit circuit and optocoupler receive circuit and described to be measured protects device place circuit not altogether.
Wherein, safety capacitor is equipped between the optocoupler transmit circuit and the first end of the protection device to be measured.
The invention also discloses a kind of actuation time detection method of power protection unit based on described device, the sides
Method includes:
Control unit generates high-frequency signal, by the high frequency signal transmission of generation to optocoupler transmit circuit；
The optocoupler transmit circuit is when the protection device to be measured is closed state, the high frequency signal transmission that will receive
Circuit and short-circuiting device are received to optocoupler；
The optocoupler receives circuit and receives the high-frequency signal transmitted by the optocoupler transmit circuit, and the high frequency received is believed
Number it is transmitted to described control unit；
Described control unit sends short circuit pulse to the short-circuiting device；
The short-circuiting device when receiving short circuit pulse, by it is described it is to be measured protection device where circuit load short circuits, with
Act the protection device to be measured to off-state from closed state；
Magnet ring generates and the short circuit when the short-circuiting device is by the load short circuits of circuit where the protection device to be measured
The corresponding inductive signal of the received high-frequency signal of device, and the inductive signal of generation is transmitted to described control unit；
Described control unit determines the protection device to be measured from closing according to the high-frequency signal and inductive signal that receive
Conjunction state was acted to the actuation time of off-state.
The invention also discloses a kind of actuation time detection system of power protection unit, the system comprises: Ruo Gansuo
The device stated, optocoupler transmit circuit and optocoupler between each device receive circuit not altogether.
The present invention by being by the high-frequency signal of optocoupler reception circuit transmission and the inductive signal of magnet ring generation
It can determine that the protection device to be measured is acted from closed state to the actuation time of off-state, detection process is simple, at low cost
It is honest and clean, and realize us grades of detection accuracy, it can minute differences between distinguishing protection device.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the actuation time detection device of the power protection unit of one embodiment of the present invention；
Fig. 2 is the high frequency signal transmission path schematic diagram of device shown in FIG. 1；
Fig. 3 is the timing diagram of S1, S4, S6 and S7 in device shown in FIG. 1；
Fig. 4 is the optocoupler transmit circuit of an embodiment of the present invention and the structural schematic diagram of optocoupler reception circuit；
Fig. 5 is the flow chart of the actuation time detection method of the power protection unit of one embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the actuation time detection system of the power protection unit of one embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Illustrate the present invention so that power protection unit selection is spaced apart as an example below, certainly, the power protection unit may be used also
For devices such as insurance, relays.Fig. 1 is the actuation time detection device of the power protection unit of one embodiment of the present invention
Structural schematic diagram；Fig. 2 is the high frequency signal transmission path schematic diagram of device shown in FIG. 1；Referring to Fig.1~2, described device packet
Include: control unit, optocoupler transmit circuit, optocoupler receive circuit, short-circuiting device and magnet ring, and the optocoupler transmit circuit, optocoupler receive
Circuit, short-circuiting device and magnet ring are connect with described control unit, and the optocoupler transmit circuit (is schemed with the first end to be measured being spaced apart
In the end " P ") connection, the optocoupler receives circuit and connect with the second end (end " Q " i.e. in figure) to be measured being spaced apart；
The high-frequency signal (" S1 " i.e. in figure) of generation is transmitted to institute for generating high-frequency signal by described control unit
Optocoupler transmit circuit is stated, and sends short circuit pulse (" S6 " i.e. in figure) to the short-circuiting device；
It should be noted that the frequency of the high-frequency signal in present embodiment is 5MHz (i.e. the period is 0.2us), certainly,
The frequency of the high-frequency signal may also be configured to other values, and present embodiment is without restriction to this.
The optocoupler transmit circuit, for it is described it is to be measured be spaced apart for closed state when, (i.e. by the high-frequency signal received
" S2 " in figure) it is transmitted to the optocoupler reception circuit and short-circuiting device；
The optocoupler receives circuit, for receiving the high-frequency signal by optocoupler transmit circuit transmission (i.e. in figure
" S3 "), the high-frequency signal received (" S4 " i.e. in figure) is transmitted to described control unit；
The short-circuiting device, for when receiving short circuit pulse, by it is described it is to be measured be spaced apart where circuit load short circuits, with
Make it is described it is to be measured be spaced apart from closed state act to off-state；
In the concrete realization, it is described it is to be measured be spaced apart where circuit by it is to be measured be spaced apart formed with load in series, the sky to be measured
The end P connection firewire (" L " i.e. in figure) opened, the end Q to be measured being spaced apart connect one end of the load, the load it is another
One end connect zero curve (" N " i.e. in figure), so, for convenient for make it is described it is to be measured be spaced apart where circuit load short circuits, this implementation
In mode, the short-circuiting device and the load parallel connection to be measured for being spaced apart place circuit.
The magnet ring, for the short-circuiting device by it is described it is to be measured be spaced apart where circuit load short circuits when, generate and institute
State the corresponding inductive signal (" S7 " i.e. in figure) of the received high-frequency signal of short-circuiting device (" S5 " i.e. in figure), and by the sense of generation
Induction signal is transmitted to described control unit；
It will be appreciated that for convenient for generation inductive signal corresponding with the received high-frequency signal of the short-circuiting device, the magnetic
The zero curve to be measured for being spaced apart place circuit is arranged on ring.
Described control unit, be also used to be determined according to the high-frequency signal and inductive signal that receive it is described it is to be measured be spaced apart from
Closed state was acted to the actuation time of off-state.
For convenient for determination it is described it is to be measured be spaced apart from closed state act to the actuation time of off-state, it is described to be measured to be spaced apart
Original state be closed state, and the original state of short-circuiting device is off-state, and referring to Fig. 3, control unit is initially that can connect
S4 is received, but since short-circuiting device is off-state, magnet ring will not generate inductive signal S7, and control unit does not receive
S7。
Control unit is after the t1 moment sends short circuit pulse S6 to short-circuiting device, when itself needing some due to short-circuiting device movement
Between, so short-circuiting device is in t2 moment execution, and at this time, control unit initially receives inductive signal, certainly, described
It is to be measured to be spaced apart and start to act at the t2 moment because of overcurrent after short-circuiting device short circuit, it is spaced apart movement needs one itself due to be measured
A little times, the t3 moment completes to disconnect, at this point, control unit does not receive S4.
So the high-frequency signal received can end time (i.e. t3 moment) and the sense that receives by described control unit
Time difference between the initial time (i.e. t2 moment) of induction signal acts from closed state to disconnected as the protection device to be measured
The actuation time of open state.
Due to being using the time difference between two moment as the protection device to be measured in present embodiment from closed form
State was acted to the actuation time of off-state, and the period of the high-frequency signal in present embodiment is 0.2us, so, it is described dynamic
The detection accuracy for making the time is also 0.2us, certainly, if wanting to improve the detection accuracy of the actuation time, it is only necessary to described in raising
The frequency of high-frequency signal, and so that optocoupler transmit circuit and optocoupler is received circuit and meet the frequency.
Present embodiment is believed by the induction that the high-frequency signal and the magnet ring that receive circuit transmission by the optocoupler generate
Number i.e. can determine that the protection device to be measured is acted from closed state to the actuation time of off-state, detection process is simple, at
This is cheap, and realizes us grades of detection accuracy, can minute differences between distinguishing protection device.
In addition, since protection device to be measured is not set in circuit by detection device in the prior art, directly to not
Protection device to be measured in circuit is detected, so that the actuation time measured excessively idealizes, but by protection to be measured
After device is installed into circuit, the actual act time is too wide in the gap with the actuation time measured, when leading to the movement measured
Between reference significance and little, and the actuation time in present embodiment is examined when protection device to be measured is set in circuit
It surveys, hence it is evident that detection device than in the prior art is more accurate.
Fig. 4 is the optocoupler transmit circuit of an embodiment of the present invention and the structural schematic diagram of optocoupler reception circuit；Referring to figure
4, the optocoupler transmit circuit includes: the first photoelectrical coupler IC1, the high-frequency signal that the optocoupler transmit circuit IC1 is received
By the input terminal (the 2nd end and the 3rd end of IC1 i.e. in figure) of first photoelectrical coupler, from first photoelectrical coupler
Output end transmission (the 6th end and the 5th end of IC1 i.e. in figure) to described optocoupler receive circuit.
It includes the second photoelectrical coupler IC2 that the optocoupler, which receives circuit, and the optocoupler receives the height that IC circuit 2 receives
Frequency signal passes through the input terminal (the 2nd end and the 3rd end of IC2 i.e. in figure) of second photoelectrical coupler, from second photoelectricity
The output end (the 6th end and the 5th end of IC2 i.e. in figure) of coupler is transmitted to described control unit.
In order to prevent it is described it is to be measured be spaced apart where circuit power supply (the usually alternating current of 220V, and photoelectrical coupler
Conducting voltage is usually no more than 3V) enter the optocoupler transmit circuit and optocoupler reception circuit, and circuit is generated, cause device to damage
It is bad, so, the optocoupler transmit circuit and optocoupler receive circuit and it is described it is to be measured be spaced apart where circuit not altogether, i.e., in figure
GND1 with it is described it is to be measured be spaced apart where the ground of circuit be not connected to, so when it is described it is to be measured be spaced apart closure when, optocoupler transmit circuit and
Optocoupler receives in circuit connection to the power supply to be measured for being spaced apart place circuit, and two claws for being similar to bird ride over electric wire
On, circuit will not be received in the optocoupler transmit circuit and optocoupler generate high current.
In addition, for prevent it is described it is to be measured be spaced apart from closed state act to the moment of off-state, it is described to be measured to be spaced apart institute
Enter the optocoupler transmit circuit in the power supply of circuit or optocoupler receives circuit, causes device to burn, described in the present embodiment
Safety capacitor C1 is equipped between optocoupler transmit circuit and the end P to be measured being spaced apart.
In the present embodiment, the specification of the first safety capacitor C1 is 1nF/2KV, and the following are capacitor AC characteristics specifically
It is bright；
The capacitive reactance calculation formula of capacitor is
1. for the power supply to be measured for being spaced apart place circuit, f=50Hz, C=0.001uF
Corresponding capacitive reactance is
2. for high-frequency signal, f=5 × 106Hz, C=0.001uF
Corresponding capacitive reactance is
I.e. the first safety capacitor is 32 Ω to the capacitive reactance of high-frequency signal, to the power supply to be measured for being spaced apart place circuit
Speech, capacitive reactance are 3 × 106Ω, so, high-frequency signal can pass through the first safety capacitor；And it is to be measured be spaced apart where circuit
Power supply is then blocked, and cannot be introduced into optocoupler transmit circuit and optocoupler receives circuit；
Fig. 5 is the flow chart of the actuation time detection method of the power protection unit of one embodiment of the present invention；Reference
Fig. 5, which comprises
S501: control unit generates high-frequency signal, by the high frequency signal transmission of generation to optocoupler transmit circuit；
S502: the optocoupler transmit circuit it is described it is to be measured be spaced apart for closed state when, the high-frequency signal received is passed
It transports to optocoupler and receives circuit and short-circuiting device；
S503: the optocoupler receives circuit and receives the high-frequency signal transmitted by the optocoupler transmit circuit, by what is received
High frequency signal transmission is to described control unit；
S504: described control unit sends short circuit pulse to the short-circuiting device；
S505: the short-circuiting device when receiving short circuit pulse, by it is described it is to be measured be spaced apart where circuit load short circuits, with
Make it is described it is to be measured be spaced apart from closed state act to off-state；
S506: magnet ring the short-circuiting device by it is described it is to be measured be spaced apart where circuit load short circuits when, generate with it is described short
The corresponding inductive signal of the received high-frequency signal of road device, and the inductive signal of generation is transmitted to described control unit；
S507: described control unit determines described to be measured be spaced apart from closing according to the high-frequency signal and inductive signal that receive
Conjunction state was acted to the actuation time of off-state.
The method of present embodiment can be used to the measurement for individually protecting device, can be applied to electric system protection device and enters
Field qualification rate detection, certainly, applies also for other scenes, present embodiment is without restriction to this.
Fig. 6 is the structural schematic diagram of the actuation time detection system of the power protection unit of one embodiment of the present invention；
Referring to Fig. 6, the system comprises several devices, optocoupler transmit circuit and optocoupler between each device receive circuit not
Altogether.
Based on cascade topological structure, difficult point is how to solve between grade high-frequency signal and mutually generates shadow by AC line
It rings.Present embodiment is used each optocoupler detector (for purposes of illustration only, so optocoupler transmit circuit and optocoupler are received electricity herein
The group on road is collectively referred to as optocoupler detector, and the transmitting terminal of optocoupler detector is optocoupler transmit circuit, the receiving end of optocoupler detector
As optocoupler receives circuit) separation power supply, not altogether, so, the receiving end of optocoupler detectors at different levels will not receive other light
The signal of coupling detector transmitting terminal, avoids erroneous judgement.
Present embodiment can be used in the measurement to different topology structure, can be used for building engineering construction side in electric power cloth
Detection before line construction；Multiple states being spaced apart can be detected simultaneously by a control unit, further reduced costs,
When be spaced apart break down when, quickly can accurately judge abort situation, reduce accident impact range and influence degree；Or prison
Detection of the mechanism to power engineering electrical performance index is managed, bigger guarantee will be obtained to the electrical safety of entire engineering；
The above embodiments are only used to illustrate the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (10)
1. a kind of actuation time detection device of power protection unit, which is characterized in that described device includes: control unit, light
Coupling transmit circuit, optocoupler receive circuit, short-circuiting device and magnet ring, and the optocoupler transmit circuit, optocoupler receive circuit, short-circuiting device and magnetic
Ring is connect with described control unit, and the optocoupler transmit circuit is connect with the first end of protection device to be measured, and the optocoupler connects
Circuit is received to connect with the second end of the protection device to be measured；
Described control unit, for generating high-frequency signal, by the high frequency signal transmission of generation to the optocoupler transmit circuit, and to
The short-circuiting device sends short circuit pulse；
The optocoupler transmit circuit, for when the protection device to be measured is closed state, the high-frequency signal received to be passed
It transports to the optocoupler and receives circuit and short-circuiting device；
The optocoupler receives circuit, for receiving the high-frequency signal transmitted by the optocoupler transmit circuit, the high frequency that will be received
Signal is transmitted to described control unit；
The short-circuiting device, for when receiving short circuit pulse, by the load short circuits of circuit where the protection device to be measured, with
Act the protection device to be measured to off-state from closed state；
The magnet ring, for the short-circuiting device by it is described it is to be measured protection device where circuit load short circuits when, generate and institute
The corresponding inductive signal of the received high-frequency signal of short-circuiting device is stated, and the inductive signal of generation is transmitted to described control unit；
Described control unit, be also used to be determined according to the high-frequency signal and inductive signal that receive the protection device to be measured from
Closed state was acted to the actuation time of off-state.
2. device as described in claim 1, which is characterized in that the optocoupler transmit circuit includes: the first photoelectrical coupler, institute
The input terminal that the high-frequency signal that optocoupler transmit circuit receives passes through first photoelectrical coupler is stated, from the first photoelectricity coupling
The output end of clutch is transmitted to the optocoupler and receives circuit.
3. device as claimed in claim 2, which is characterized in that it includes the second photoelectrical coupler, institute that the optocoupler, which receives circuit,
It states optocoupler and receives the input terminal that the high-frequency signal that circuit receives passes through second photoelectrical coupler, from the second photoelectricity coupling
The output end of clutch is transmitted to described control unit.
4. device as described in claim 1, which is characterized in that described control unit is further used for the high frequency that will be received
Time difference between the end time of signal and the initial time of the inductive signal received as the protection device to be measured from
Closed state was acted to the actuation time of off-state.
5. device as described in any one of claims 1 to 4, which is characterized in that the short-circuiting device and the protector to be measured
The load parallel connection of circuit where part.
6. device as described in any one of claims 1 to 4, which is characterized in that be arranged with the guarantor to be measured on the magnet ring
The zero curve of circuit where protecting device.
7. device as described in any one of claims 1 to 4, which is characterized in that the optocoupler transmit circuit and optocoupler receive
Circuit and described to be measured protect device place circuit not altogether.
8. device as claimed in claim 7, which is characterized in that the of the optocoupler transmit circuit and the protection device to be measured
Safety capacitor is equipped between one end.
9. a kind of actuation time detection method of the power protection unit of the device based on any one of claim 1~8, feature
It is, which comprises
Control unit generates high-frequency signal, by the high frequency signal transmission of generation to optocoupler transmit circuit；
The optocoupler transmit circuit is when the protection device to be measured is closed state, by the high frequency signal transmission received to light
Circuit and short-circuiting device are received in coupling；
The optocoupler receives circuit and receives the high-frequency signal transmitted by the optocoupler transmit circuit, and the high-frequency signal received is passed
Transport to described control unit；
Described control unit sends short circuit pulse to the short-circuiting device；
The short-circuiting device is when receiving short circuit pulse, by the load short circuits of circuit where the protection device to be measured, so that institute
Protection device to be measured is stated to act from closed state to off-state；
When the short-circuiting device is by the load short circuits of circuit where the protection device to be measured, generation connects magnet ring with the short-circuiting device
The corresponding inductive signal of the high-frequency signal of receipts, and the inductive signal of generation is transmitted to described control unit；
Described control unit determines the protection device to be measured from closed form according to the high-frequency signal and inductive signal that receive
State was acted to the actuation time of off-state.
10. a kind of actuation time detection system of power protection unit, which is characterized in that the system comprises: several rights are wanted
Device described in asking any one of 1~8, optocoupler transmit circuit and optocoupler between each device receive circuit not altogether.
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| CN104409279A (en) * | 2014-11-27 | 2015-03-11 | 广东美的厨房电器制造有限公司 | Relay driving device |
| CN204287425U (en) * | 2014-12-23 | 2015-04-22 | 西安科技大学 | Mine Switch operating condition observation circuit |
| CN205120844U (en) * | 2015-08-31 | 2016-03-30 | 北京飞利信电子技术有限公司 | Electric power protective device's operate time detection device and system |
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| CN105116259A (en) | 2015-12-02 |
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