CN110504657A - Middle pressure ring network cabinet power failure tripping device - Google Patents
Middle pressure ring network cabinet power failure tripping device Download PDFInfo
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- CN110504657A CN110504657A CN201910697757.3A CN201910697757A CN110504657A CN 110504657 A CN110504657 A CN 110504657A CN 201910697757 A CN201910697757 A CN 201910697757A CN 110504657 A CN110504657 A CN 110504657A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 30
- 230000005611 electricity Effects 0.000 claims abstract description 20
- 238000004364 calculation method Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/06—Arrangements for supplying operative power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
Abstract
The present invention relates to wind-powered electricity generation control fields, ring network cabinet power failure tripping device is pressed in open one kind, including supercapacitor group, charge circuit, discharge loop, supply voltage measure loop, middle pressure ring network cabinet power failure tripping device of the invention, pressure ring network cabinet power failure tripping device is using supercapacitor group as backup power supply in this；When ring network cabinet is in normal operating condition, external control power supply provides operation power for ring network cabinet control loop；Ring network cabinet controls power supply and can be charged by charge circuit to supercapacitor group；Meanwhile relay ZJ electrification is attracted for monitoring operation circuit supply voltage；When the unexpected power loss of ring network cabinet control power supply failure; relay ZJ power loss; the discharge loop of supply voltage measure loop connection supercapacitor group; supercapacitor group is powered by electric discharge outlet Vout+ to breaking coil TQ2 at this time; drive main circuit breaker QF tripping; the electrical connection between wind-driven generator and electric system is cut off, to play power failure tripping protective effect.
Description
Technical field
The present invention relates to wind-powered electricity generation control field more particularly to middle pressure ring network cabinet power failure tripping devices.
Background technique
In wind power generation field, the voltage that traditional wind-driven generator issues is 0.69kV, using secondary booster mode, i.e.,
The box boosting of a 35kV is configured outside every Fans tower to become, first boosts to 35kV, after collection electric line confluence, then is accessed
Wind power plant 110kV or 220kV booster stations, import electric system after secondary booster.
The 0.69kV electric energy that above boosting mode needs blower to issue passes through up to the low of rice up to a hundred or even hundreds of meters
Piezoelectric forces cable, which send to 35kV to boost, to be become, with incrementally increasing for installed capacity, caused by line loss be consequently increased, run
Mode is very uneconomical.Currently, a kind of new development trend is step-up transformer to be directly installed on nearby the power generation of tower top
By machine, ring network cabinet installs middle part or bottom to tower.The 0.69kV electric energy that blower issues directly boosts to 35kV, and high pressure passes
The ring network cabinet in tower is transported to, 35kV electric energy is sent to wind park 110kV or 220kV booster stations after ring network cabinet is converged, then
Electric system is imported after boosted, plays good energy-saving effect in this way.On the other hand, by optimization blower and ring network cabinet
The control loop and signal circuit power consumption in portion control power supply by 220V or 110V and are changed to 24V power supply power supply, further decrease electric energy
Consumption.
Wherein, ring network cabinet as connection wind-driven generator and electric system intermediary electrical equipment, built in height press off
Closing equipment can shield, and when breaking down such as electric system, can cut off between wind-driven generator and electric system
Connection, avoids safety accident；If the utility model patent of Publication No. CN202454900U is exactly a kind of similar looped network
Cabinet.
However above-mentioned high-tension switch gear needs to be powered by the external control power supply of ring network cabinet in the process of running；If
Power supply power loss due to failure is controlled, then it is out of control to will lead to high-tension switch gear, can not carry out safety operation, there are larger peaces
Full hidden danger.
Summary of the invention
The present invention in view of the shortcomings of the prior art, provides pressure ring network cabinet power failure tripping device in one kind, has ring network cabinet
Automatic trip defencive function after control power loss.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals:
Ring network cabinet power failure tripping device is pressed in one kind, including
Supercapacitor group, including charging import Vin+, electric discharge outlet Vout+ and ground terminal GND, ground terminal GND connection
In the cathode KM- of ring network cabinet control power supply；
Charge circuit, including resistance R, one end of resistance R are connected to the positive KM+ of ring network cabinet control power supply, and the other end connects
It is connected to the charging import Vin+ of supercapacitor group；
Discharge loop, normally opened auxiliary contact QF2 and breaking coil TQ2 including breaker, the one of normally opened auxiliary contact QF2
End is connected to the electric discharge outlet Vout+ of supercapacitor group, and the other end of normally opened auxiliary contact QF2 is connected to breaking coil TQ2
One end, the other end of breaking coil TQ2 be connected to ring network cabinet control power supply cathode KM-；It further include being connected to wind-power electricity generation
Main circuit breaker QF between machine and electric system, the sub-switching operation of breaking coil TQ2 drive control main circuit breaker QF,
To disconnect the connection of wind-driven generator and electric system；
Supply voltage measure loop, including relay ZJ, the coils from parallel connection of coils of relay ZJ is in the two of ring network cabinet control power supply
End, the normally-closed contact ZJ-1 of relay ZJ are series at the place circuit of discharge loop.
Using the above scheme, press ring network cabinet power failure tripping device using supercapacitor group as backup power supply in this；Work as ring
When net cabinet is in normal operating condition, external control power supply provides operation power for ring network cabinet control loop；Ring network cabinet control electricity
Source can be charged by charge circuit to supercapacitor group；Meanwhile relay ZJ electrification is attracted for monitoring operation circuit electricity
Source voltage；When the unexpected power loss of ring network cabinet control power supply failure, relay ZJ power loss, supply voltage measure loop is connected super
The discharge loop of capacitor group, supercapacitor group is powered by electric discharge outlet Vout+ to breaking coil TQ2 at this time, to drive
Dynamic main circuit breaker QF tripping, cuts off the electrical connection between wind-driven generator and electric system, and then play power failure tripping
Protective effect.
Preferably, further including supercapacitor group on-line monitoring circuit, supercapacitor group on-line monitoring circuit includes
Normally opened auxiliary contact QF1, relay K and the indicator elment of breaker, the coil of normally opened auxiliary contact QF1 and relay K are mutually gone here and there
Connection, the other end of the coil of the other end and relay K of normally opened auxiliary contact QF1 are parallel to the both ends of resistance R；Relay K's
One end of normally opened contact K-1 is connected to the positive KM+ of ring network cabinet control power supply, and the other end is connected to one end of indicator elment, refers to
Show that the other end of element is connected to the cathode KM- of ring network cabinet control power supply.
Using the above scheme, with the increase for using duration, the quality of supercapacitor group can gradually decline, so that super
After capacitor group is fully charged, the leakage current generated can increase with capacitor quality decline；Therefore, in parallel at the both ends of resistance R
Supercapacitor group monitors circuit on-line, and when ring network cabinet control power supply is in normal operating condition, normally opened auxiliary contact QF1 is in
Closed state, so that supercapacitor group on-line monitoring circuit is switched on；If the quality of supercapacitor group is in shape,
Then it is smaller in fully charged rear generated leakage current, is not enough to drive the coil of relay K, so that the normally opened touching of relay K
Point K-1 is disconnected, and to cut off the current supply circuit of indicator elment, indicator elment stops working；Conversely, if the quality of supercapacitor group
Decline it is more serious, then its after fully charged caused by leakage current it is larger, the coil of relay K can be driven to obtain electric suction at this time
It closes, so that the normally opened contact K-1 of relay K is closed, connects the current supply circuit of indicator elment, so that indicator elment issues alarm signal
Number, it reminds the user that the service life of supercapacitor group will exhaust, is replaced, it is more humanized.
Preferably, indicator elment is indicator light HD.
Using the above scheme, indicator light is more eye-catching, and corresponding prompt letter can be provided in time when user needs to check
Breath, it is more humanized.
Preferably, supercapacitor group on-line monitoring circuit is also connected with current monitoring module, current monitoring module connects
It is connected to control module, control module is connected with display module；Control module includes a buffer and is preset with a maximum electric leakage
Flow valuve Imax；The current value that current monitoring module is used to detect the current value in supercapacitor group on-line monitoring circuit and will acquire
The buffer being sent in control module is stored, and generates the detection time point of the electric current Value Data；Control module according to
The variable quantity of deposited current value and time interval calculation go out the curent change in supercapacitor group on-line monitoring circuit in buffer
Then rate λ calculates the current differential Δ I in maximum leakage current value Imax and buffer between the last deposited current value, most
The residue of supercapacitor group is calculated according to current differential Δ I and current changing rate λ afterwards using duration T, control module will
The residue being calculated is sent to display module using duration T and is shown.
Preferably, the calculation method of current changing rate λ are as follows: the electric current that will be measured recently in buffer by control module
Value and the preceding current value once measured make difference to obtain current differential Δ i, calculate above-mentioned two current value according to control module
Time interval Δ t between corresponding detection time point；The value of current changing rate λ is calculated by formula λ=Δ i/ Δ t；
The calculation method of current differential Δ I are as follows: will be nearest in maximum leakage current value Imax and buffer by control module
It is poor that the current value measured is made, and current differential Δ I is calculated；
The residue of supercapacitor group uses the calculation method of duration T are as follows: calculates super electricity by formula T=Δ I/ λ
The residue of container group uses the value of duration T.
Using the above scheme, current monitoring module can monitor the leakage for flowing through supercapacitor group on-line monitoring circuit in real time
Electric current can calculate the residue of supercapacitor group using duration by the operation of control module, and by display module into
Row is shown, allows users to the remaining life for understanding supercapacitor group at any time, more humanized.
Preferably, control module is also connected with alarm module, when control module monitors the electric current stored in buffer
Value is more than or equal to maximum leakage current value Imax, and control module controls alarm module alarm.
Using the above scheme, when the leakage current value that current monitoring module measures is more than or equal to maximum leakage current value Imax,
Illustrate that the service life of supercapacitor group has exhausted, control module can control alarm module alarm at this time, to remind user
Replacement supercapacitor group in time, further promotes ease of use.
The present invention has significant technical effect: pressing ring network cabinet power failure tripping in this due to using above technical scheme
Device is using supercapacitor group as backup power supply；When ring network cabinet is in normal operating condition, external control power supply is looped network
Cabinet control loop provides operation power；Ring network cabinet controls power supply and can be charged by charge circuit to supercapacitor group；Meanwhile
Relay ZJ electrification is attracted for monitoring operation circuit supply voltage；When ring network cabinet control power supply breaks down unexpected power loss, after
Electric appliance ZJ power loss, supply voltage measure loop connect the discharge loop of supercapacitor group, and supercapacitor group is by putting at this time
Electricity outlet Vout+ powers to breaking coil TQ2, so that main circuit breaker QF be driven to trip, cuts off wind-driven generator and electric power
Electrical connection between system, and then play power failure tripping protective effect.
Detailed description of the invention
Fig. 1 is the circuit diagram of the present embodiment one；
Fig. 2 is the circuit diagram of the present embodiment two；
Fig. 3 is the system architecture diagram of the present embodiment two.
The toponym that each number designation is referred in the figures above is as follows: 1, supercapacitor group；2, current monitoring mould
Block；3, control module；4, display module；5, alarm module.
Specific embodiment
Present invention is further described in detail with embodiment with reference to the accompanying drawing.
Embodiment one
As shown in Figure 1, ring network cabinet power failure tripping device is pressed in one kind disclosed in the present embodiment, including supercapacitor group 1,
Charge circuit, discharge loop and supply voltage measure loop.
More specifically, supercapacitor group 1 includes charging import Vin+, electric discharge outlet Vout+ and ground terminal GND, ground connection
End GND is connected to the cathode KM- of ring network cabinet control power supply；Wherein, ring network cabinet control power supply is 24V DC power supply, for looped network
Cabinet power supply.Charge circuit includes resistance R, and one end of resistance R is connected to the positive KM+ of ring network cabinet control power supply, other end connection
In the charging import Vin+ of supercapacitor group 1, resistance R be current-limiting resistance；Discharge loop includes the normally opened auxiliary of breaker
Contact QF2 and breaking coil TQ2, one end of normally opened auxiliary contact QF2 are connected to the electric discharge outlet Vout+ of supercapacitor group 1,
The other end of normally opened auxiliary contact QF2 is connected to one end of breaking coil TQ2, and the other end of breaking coil TQ2 is connected to looped network
The cathode KM- of cabinet control power supply；It further include the main circuit breaker QF being connected between wind-driven generator and electric system, tripping
The sub-switching operation of coil TQ2 drive control main circuit breaker QF, to disconnect the connection of wind-driven generator and electric system；It can be with
Understand, main circuit breaker QF is controlled by breaking coil TQ2 and is acted, i.e., when breaking coil TQ2 is in obtain electricity condition
When, it can control main circuit breaker QF separating brake, to cut off the connection between wind-driven generator and electric system.Due to the line that trips
Circle TQ2 belongs to the opening coil being integrated in bistable state circuit breaker Q F, therefore, only need to send an electricity to breaking coil TQ2
Pulse just can make main circuit breaker QF disjunction, and maintain disjunction state；Unless being integrated in in bistable state breaker
Closing coil (not shown) obtain combined floodgate electric pulse, can just it be made to re-close, and maintain closed state so that wind-force send out
Motor is connect with power system recovery.Supply voltage measure loop includes relay ZJ, and the coils from parallel connection of coils of relay ZJ is in looped network
Cabinet controls the both ends of power supply, and the normally-closed contact ZJ-1 of relay ZJ is series at the place circuit of discharge loop.
Further, middle pressure ring network cabinet power failure tripping device further includes supercapacitor group on-line monitoring circuit, super
Capacitor group on-line monitoring circuit includes that normally opened auxiliary contact QF1, relay K and indicator elment, the indicator elment of breaker are
Indicator light HD.The coil of normally opened auxiliary contact QF1 and relay K is connected in series, the other end and relay of normally opened auxiliary contact QF1
The other end of the coil of K is parallel to the both ends of resistance R；One end of the normally opened contact K-1 of relay K is connected to ring network cabinet control electricity
The positive KM+ in source, the other end are connected to one end of indicator elment, and the other end of indicator elment is connected to ring network cabinet control power supply
Cathode KM-.
In foregoing circuit connection relationship, normally opened auxiliary contact QF1 and normally opened auxiliary contact QF2 are bistable state circuit breaker Q F
Auxiliary contact, be controlled by bistable state breaker internal coil (closing coil and opening coil).It closes a floodgate when ring network cabinet is in
When state, the normally opened auxiliary contact QF1 and QF2 of bistable state circuit breaker Q F being capable of synchronizing close；Conversely, when ring network cabinet is in separating brake
When state, the normally opened auxiliary contact QF1 and QF2 of bistable state circuit breaker Q F can simultaneous break, be the prior art, and be ability
Known to field technique personnel, no longer it is described in detail herein.In addition, for the type selecting of component in foregoing circuit connection relationship,
It can be selected according to actual use occasion, be no longer described in detail one by one herein.
It is described in detail now in conjunction with working principle of the attached drawing to foregoing circuit connection relationship:
After ring network cabinet control power supply KM is powered on, it can charge quickly through current-limiting resistance R to supercapacitor group 1.Master fills
Electric mode can be completed at 2~3 seconds, then be transferred to floating charge electricity condition, the electric leakage of floating current and supercapacitor group 1 automatically
It is identical to flow size；Meanwhile relay ZJ obtains electric actuation, corresponding normally-closed contact ZJ-1 is disconnected.After ring network cabinet is closed a floodgate, main circuit
Circuit breaker Q F turns to "on" position by separating brake, so that wind-driven generator is to electric system power transmission.Meanwhile circuit breaker Q F's is normally opened auxiliary
Adjuvant grafting point QF1 and QF2 are also by disjunction state shift closed state.At this point, ring network cabinet control power supply KM is by current-limiting resistance R and surpasses
Grade capacitor group monitors circuit parallel connection on-line and carries out floating charging to supercapacitor group 1, and supercapacitor group monitors circuit on-line
It is composed in series by the coil of normally opened auxiliary contact QF1 and relay K.
Conversely, the coil losing electricity of relay ZJ resets, corresponding normal if ring network cabinet controls power supply KM power loss due to failure
Closed contact ZJ-1 is re-closed, and connects the discharge loop of the electric discharge outlet Vout+ of supercapacitor group 1, discharge loop is to tripping
Coil TQ2 power supply, so that breaking coil TQ2 must electrically activate main circuit breaker QF separating brake, to cut off wind-driven generator and electricity
Connection between Force system ensure that electric system and the safety of wind-driven generator.
About the working principle in supercapacitor group on-line monitoring circuit, after supercapacitor group 1 is fully charged, if super
The quality of capacitor group 1 is in shape, then its generated leakage current is smaller, is not enough to drive the coil of relay K, makes
The normally opened contact K-1 for obtaining relay K is disconnected, and cuts off the current supply circuit of indicator elment, indicator elment stops working；Conversely, if super
The quality decline of grade capacitor group 1 is more serious, then it is larger in fully charged rear generated leakage current, can drive relay
The coil of K is attracted, so that the normally opened contact K-1 of relay K is closed, the current supply circuit of indicator elment is connected, so that indicator elment
Standby signal is issued, reminds the user that the service life of supercapacitor group 1 will exhaust, is replaced, more people
Property.
Embodiment two
As shown in Figures 2 and 3, on the basis of embodiment one, supercapacitor group on-line monitoring circuit is also connected with electricity
Monitoring modular 2 is flowed, which is preferably digital ammeter；Current monitoring module 2 is connected with control module 3, should
Control module 3 is chip or equipment with data-handling capacity, including but not limited to single-chip microcontroller, PLC, CPU, MCU, ARM etc..
Control module 3 is connected with display module 4, which is preferably liquid crystal display or touch screen.More specifically, it controls
Module 3 includes a buffer and is preset with a maximum leakage current value Imax；The maximum leakage current value Imax corresponds to super electricity
The service life of container group 1 generated leakage current value when exhausting.Current monitoring module 2 is online for detecting supercapacitor group
The buffer that the current value of monitoring circuit and the current value that will acquire are sent in control module 3 is stored, and generates the electricity
The detection time point of flow valuve data；Control module 3 goes out according to the variable quantity and time interval calculation of current value deposited in buffer
Supercapacitor group monitors the current changing rate λ in circuit on-line, then calculates in maximum leakage current value Imax and buffer recently
The once current differential Δ I between deposited current value is finally calculated according to current differential Δ I and current changing rate λ super
The residue of capacitor group 1 use duration T, control module 3 by the residue being calculated using duration T be sent to display module 4 into
Row display.User can use the numerical value of duration T according to the residue shown in display module 4, understand the surplus of supercapacitor group 1
Remaining service life, to carry out the preparation of replacement supercapacitor group 1 in advance.
Further, control module 3 is also connected with alarm module 5, which is preferably sounding alarm electricity
Road.When control module 3 monitors that the current value stored in buffer is more than or equal to maximum leakage current value Imax, control module 3 is controlled
Alarm module 5 processed alerts, i.e., reminds the service life of user's supercapacitor group 1 to reach by way of issuing caution sound upper
Limit, needs to replace in time.
Embodiment three
On the basis of embodiment two, the calculation method of current changing rate λ are as follows: by control module 3 by buffer most
The current value and the preceding current value once measured closely measured makees difference to obtain current differential Δ i, is calculated according to control module 3
State the time interval Δ t between detection time point corresponding to two current values；Electric current is calculated by formula λ=Δ i/ Δ t
The value of change rate λ；
The calculation method of current differential Δ I are as follows: will be nearest in maximum leakage current value Imax and buffer by control module 3
It is poor that the current value measured is made, and current differential Δ I is calculated；
The residue of supercapacitor group 1 uses the calculation method of duration T are as follows: calculates super electricity by formula T=Δ I/ λ
The residue of container group 1 uses the value of duration T.
Claims (6)
1. pressing ring network cabinet power failure tripping device in one kind, it is characterised in that: including
Supercapacitor group (1), including charging import Vin+, electric discharge outlet Vout+ and ground terminal GND, ground terminal GND connection
In the cathode KM- of ring network cabinet control power supply；
Charge circuit, including resistance R, one end of resistance R are connected to the positive KM+ of ring network cabinet control power supply, and the other end is connected to
The charging import Vin+ of supercapacitor group (1)；
One end of discharge loop, normally opened auxiliary contact QF2 and breaking coil TQ2 including breaker, normally opened auxiliary contact QF2 connects
It is connected to the electric discharge outlet Vout+ of supercapacitor group (1), the other end of normally opened auxiliary contact QF2 is connected to breaking coil TQ2's
One end, the other end of breaking coil TQ2 are connected to the cathode KM- of ring network cabinet control power supply；It further include being connected to wind-driven generator
Main circuit breaker QF between electric system, the sub-switching operation of breaking coil TQ2 drive control main circuit breaker QF, with
Disconnect the connection of wind-driven generator and electric system；
Supply voltage measure loop, including relay ZJ, the coils from parallel connection of coils of relay ZJ control the both ends of power supply in ring network cabinet, after
The normally-closed contact ZJ-1 of electric appliance ZJ is series at the place circuit of discharge loop.
2. middle pressure ring network cabinet power failure tripping device according to claim 1, it is characterised in that: further include supercapacitor group
Monitor circuit on-line, supercapacitor group on-line monitoring circuit includes normally opened auxiliary contact QF1, the relay K of breaker and refers to
Show that element, the coil of normally opened auxiliary contact QF1 and relay K are connected in series, the other end and relay K of normally opened auxiliary contact QF1
The other end of coil be parallel to the both ends of resistance R；One end of the normally opened contact K-1 of relay K is connected to ring network cabinet control electricity
The positive KM+ in source, the other end are connected to one end of indicator elment, and the other end of indicator elment is connected to ring network cabinet control power supply
Cathode KM-.
3. middle pressure ring network cabinet power failure tripping device according to claim 2, it is characterised in that: indicator elment is indicator light
HD。
4. middle pressure ring network cabinet power failure tripping device according to claim 2, it is characterised in that: supercapacitor group is supervised online
Survey time road is also connected with current monitoring module (2), and current monitoring module (2) is connected with control module (3), and control module (3) is even
It is connected to display module (4)；Control module (3) includes a buffer and is preset with a maximum leakage current value Imax；Current monitoring
Module (2) is used to detect the current value in supercapacitor group on-line monitoring circuit and the current value that will acquire is sent to control module
(3) buffer in is stored, and generates the detection time point of the electric current Value Data；Control module (3) is according in buffer
The variable quantity and time interval calculation of deposited current value go out the current changing rate λ in supercapacitor group on-line monitoring circuit, then
The current differential Δ I in maximum leakage current value Imax and buffer between the last deposited current value is calculated, finally according to electricity
The residue of supercapacitor group (1) is calculated using duration T in stream difference DELTA I and current changing rate λ, and control module (3) will be counted
Obtained residue is sent to display module (4) using duration T and is shown.
5. middle pressure ring network cabinet power failure tripping device according to claim 4, it is characterised in that:
The calculation method of current changing rate λ are as follows: by control module (3) by the current value measured recently in buffer and preceding primary
The current value measured makees difference to obtain current differential Δ i, is calculated corresponding to above-mentioned two current value according to control module (3)
Time interval Δ t between detection time point；The value of current changing rate λ is calculated by formula λ=Δ i/ Δ t；
The calculation method of current differential Δ I are as follows: surveyed maximum leakage current value Imax recently in buffer by control module (3)
It is poor that the current value obtained is made, and current differential Δ I is calculated；
The residue of supercapacitor group (1) uses the calculation method of duration T are as follows: calculates super capacitor by formula T=Δ I/ λ
The residue of device group (1) uses the value of duration T.
6. middle pressure ring network cabinet power failure tripping device according to claim 4, it is characterised in that: control module (3) is also connected with
There are alarm module (5), when control module (3) monitors that the current value stored in buffer is more than or equal to maximum leakage current value
Imax, control module (3) control alarm module (5) alarm.
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| CN201910697757.3A CN110504657B (en) | 2019-07-31 | 2019-07-31 | Medium-voltage ring main unit power-failure tripping device |
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| CN201910697757.3A CN110504657B (en) | 2019-07-31 | 2019-07-31 | Medium-voltage ring main unit power-failure tripping device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663981A (en) * | 2022-12-26 | 2023-01-31 | 深圳市今朝时代股份有限公司 | Voltage control method for super capacitor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6359763B1 (en) * | 1998-10-16 | 2002-03-19 | Alstom Uk Limited | Monitoring apparatus for electrical circuits |
| KR101059771B1 (en) * | 2011-01-10 | 2011-08-26 | 주식회사 원방하이테크 | Apparatus for monitoring operating characteristics of circuit breaker having a study function |
| CN105914868A (en) * | 2016-05-18 | 2016-08-31 | 西安科技大学 | Supercapacitor energy storage uninterruptible power supply based on current transformer, and power supply method thereof |
| CN207184025U (en) * | 2017-06-15 | 2018-04-03 | 国网山西省电力公司电力科学研究院 | Breaker emergency trip control circuit after dc source all disappears |
| CN210468779U (en) * | 2019-07-31 | 2020-05-05 | 宁波天安（集团）股份有限公司 | Power-off tripping device of medium-voltage ring main unit |
-
2019
- 2019-07-31 CN CN201910697757.3A patent/CN110504657B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6359763B1 (en) * | 1998-10-16 | 2002-03-19 | Alstom Uk Limited | Monitoring apparatus for electrical circuits |
| KR101059771B1 (en) * | 2011-01-10 | 2011-08-26 | 주식회사 원방하이테크 | Apparatus for monitoring operating characteristics of circuit breaker having a study function |
| CN105914868A (en) * | 2016-05-18 | 2016-08-31 | 西安科技大学 | Supercapacitor energy storage uninterruptible power supply based on current transformer, and power supply method thereof |
| CN207184025U (en) * | 2017-06-15 | 2018-04-03 | 国网山西省电力公司电力科学研究院 | Breaker emergency trip control circuit after dc source all disappears |
| CN210468779U (en) * | 2019-07-31 | 2020-05-05 | 宁波天安（集团）股份有限公司 | Power-off tripping device of medium-voltage ring main unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663981A (en) * | 2022-12-26 | 2023-01-31 | 深圳市今朝时代股份有限公司 | Voltage control method for super capacitor |
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