CN106374438A - Power system - Google Patents
Power system Download PDFInfo
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- CN106374438A CN106374438A CN201610677557.8A CN201610677557A CN106374438A CN 106374438 A CN106374438 A CN 106374438A CN 201610677557 A CN201610677557 A CN 201610677557A CN 106374438 A CN106374438 A CN 106374438A
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- Prior art keywords
- circuit
- power
- current
- short circuit
- voltage
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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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
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention proposes a power system. The power system comprises power supply equipment, wherein the power supply equipment is connected with a partial discharge monitoring device and a power distribution protection device, the partial discharge monitoring device is used for monitoring a partial discharge condition of the power supply equipment in real time and on line, and the power distribution protection device is used for monitoring a running short-circuit current of power equipment in real time and cutting off a power supply source of the power equipment when the monitored running short-circuit current reaches an expected short-circuit current and exceeds a first preset threshold value within a very short time. By the power system, power distribution protection and partial discharge monitoring can be effectively achieved, the balanced running of the power equipment is protected, and a potential risk is avoided.
Description
Technical field
The invention belongs to technical field of electric power, particularly to a kind of power system.
Background technology
At present, with economic fast development, low pressure (exchange is less than 1500v less than 1000v or direct current) power distribution system
In occupation of leading position, it is the last connection between power system and end user to system, is to contact the closest, use with user
The link that equipment is at most, circuit is the longest, power consumption is maximum, be unable to do without low everywhere in factory, mine, city, rural area etc.
It is press-fitted electric system, so, reasonable, the safe efficient and stable operation of low-voltage distribution system, direct relation the use of users
Electric reliability and power quality, thus protection is carried out to low-voltage distribution system distribution line, control device etc. and is significant.
Low-voltage distribution protection at present selects breaker of plastic casing, fuse or RCCB, realizes quick-break, long delay protection, but very
Many breaker of plastic casing operation precision not, and do not possess real time monitoring signals show, logout and communicate the functions such as networking；And
Using thermorelay as motor overload protection and control element, limited by element quality, technique, cannot have been met day
Exhibition automation technolo increasingly requires；Additionally, during power equipment uses, aging with power equipment, electric power can be caused
There is partial discharge phenomenon in equipment, there is great potential safety hazard, seriously threatens safety and the development of society.
Therefore, need now a kind of power system badly, power distribution protection and partial discharge monitoring, protection electricity can be effectively realized
The balance movement of power equipment, it is to avoid potential safety hazard.
Content of the invention
The present invention proposes a kind of power system, solves in prior art and there is shelf depreciation in power equipment running
Phenomenon and because short circuit current cause there is potential safety hazard.
The technical scheme is that and be achieved in that: power system, including power supply unit, power supply unit is connected with local
Discharge monitoring device and power distribution protective device, the shelf depreciation feelings of partial discharge monitoring device real time on-line monitoring power supply unit
Condition, the operation short circuit current of power distribution protective device real-time monitoring power equipment, when monitoring operation short circuit current reach expection short
Road electric current, and when short circuit duration exceeds the first pre-set threshold value, power distribution protective device cuts off the power supply of power equipment.
As one kind preferred embodiment, power distribution protective device, including distribution controller, distribution controller is connected with short
Road protector, according to the prospective short circuit current of the parameter determination power supply unit of power equipment, short-circuit protector is real for distribution controller
When monitoring power equipment operation short circuit current, when the operation short circuit current of monitoring reaches prospective short circuit current, and short circuit duration
During beyond the first pre-set threshold value, shown by display, and short-circuit protector is cut off the power supply of power equipment.
As one kind preferred embodiment, short-circuit protector includes automatic circuit and sectionaliser, and distribution controller utilizes and divides
Closing of short circuit current realized by section device, and distribution controller utilizes automatic circuit to excise short circuit current, the pre-set coincidence of automatic circuit
Number of times, when the actual coincidence number of times of switch reaches setting value and switchs board gate-dividing state, then locking automatic closing, isolation event
Barrier circuit, automatic circuit is provided with gap periods, and gap periods are the time interval of automatic circuit each division operation, sectionaliser point
Closing operation is decided by line voltage distribution, and the power supply of switch is separating brake, then closes a floodgate after incoming call.
As one kind preferred embodiment, the maximum short circuit current according to power equipment, determines the quick-break of power equipment
One sub-value, wherein quick-break one sub-value is linear with maximum short circuit current, and maximum short circuit current is using directly maximum transformation
Device is placed in route head end and calculates maximum short circuit current, and the supply line of power supply unit is connected with protection system to earth, ground protection
When occurring power supply unit to touch shell earth fault, earth current passes through earth resistance and the protection system to earth of power supply unit to system
Earth resistance formed loop, and on two resistance produce pressure drop, reduce power supply unit shell on institute with voltage.
As one kind preferred embodiment, using current quick it is stipulated that under maximum operational mode three-phase shortcircuit
When, protection domain is maximum, is lmax, and under minimum operational mode during line to line fault, protection domain is minimum, is lmin, wherein,
Under minimum operational mode, the relative value of fast tripping protection scope meets:
In formula: k1rel-- safety factor；Line end three-phase shortcircuit stable state electricity under i2k3.max-- maximum operational mode
Stream；Iopk-- protection device one-off electric current；Es-- system reference voltage；Under xs.max-- system maximum operational mode
Little equivalent impedance, current quick scope includes the end of lower bar circuit or power equipment, the action current of protection seting
The overload electric current of circuit should be escaped, when supply line's imbalance of three-phase voltage rate is more than target setting, and prolong beyond imbalance
When the time after, controller control start Voltage unbalance protection, determine three-phase piezoelectricity unbalance factor, using setting capacitor device
Realize, some group capacitor devices are carried out star-star connection mode connection, the voltage power taking case of unstable voltage protection
The open delta voltage of group.
As one kind preferred embodiment, controller is put in the local discharge detection device office of inclusion, and office puts controller and connects
Have an amplification sample circuit, amplify sample circuit and be connected with a/d change-over circuit, a/d change-over circuit be connected with ultrasonic sensor and
Pulse generator, controller is put in office and a/d change-over circuit is connected with memorizer, and office puts controller and is connected with display.
As one kind preferred embodiment, pulse generator produces instantaneous voltage change at measurement equipment two ends to be checked, should
Instantaneous voltage change produces pulse current in the loop, and by this impulse circuit, impedance produces pulse voltage, amplifier after testing
Shown by display afterwards, transient voltage change is coupled to be capacitively coupled to detection impedance, produces pulse current in loop,
Impedance produces pulse voltage to pulse current after testing, is provided with front-end processing electricity between ultrasonic sensor and a/d change-over circuit
Road, the signal that ultrasonic sensor receives is carried out Phototube Coupling by front-end processing circuit, and then amplified sample circuit is put
Big sampling processing, when sampled result exceeds pre-set threshold value, points out there is partial discharge phenomenon.
As one kind preferred embodiment, ultrasonic sensor includes housing and is arranged at damping block in housing,
Damping block bottom is provided with piezoelectric chip, and piezoelectric chip bottom is provided with protecting film, is provided with binding post, wiring above damping block
Post is connected with conductive lever, and conductive lever part runs through housing, and office puts controller and passes the partial enlargement parameter of measurement equipment to be checked
Transport to server, the minimum discharge cycle of server statistics measurement equipment to be checked and maximum pd quantity, office puts controller and is connected with report
Alert unit, each minimum discharge cycle, office puts controller and controls alarm unit to carry out police instruction, sets up ultrasonic signal and puts
The corresponding linear relationship of electricity, determines discharge capacity maximum according to corresponding relation and ultrasonic signal amplitude.
As one kind preferred embodiment, determine discharge capacity maximum first, the feedback according to ultrasonic sensor first,
Office puts controller and determines discharge waveform by the amplitude of ultrasonic signal, frequency and discharge cycle, and display virtual oscillography shows puts
Electrical waveform.
As one kind preferred embodiment, amplify sample circuit to input by signalling channel receipt signal, local is put
The signal of telecommunication is enlarged into level signal, amplifies sample circuit and passes through signal by reference to signal reception reference signal, through frequency spectrum migration
After export.
After employing technique scheme, the invention has the beneficial effects as follows: by estimating prospective short circuit current, and quick-break electricity
Flow valuve, is up to prospective short circuit current shortly and achieves auto-cutout protection；Meanwhile, it is additionally provided with Voltage unbalance protection, lead to
The unbalance factor crossing three-phase piezoelectricity determines the target setting of imbalance of three-phase voltage rate；The present invention is capable of power distribution protection, protects
The balance movement of card power equipment；By the shelf depreciation letter of ultrasonic sensor and pulse generator real-time detection power equipment
Number, and by a series of process, so that Partial Discharge is shown over the display, can effectively learn power equipment
Shelf depreciation situation, thus maintaining easily the maintenance that personnel carry out power equipment, it is to avoid retrieving occurs being difficult in power equipment
Fault, even causes security incident.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, also may be used
So that other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is block diagram of the present invention；
Fig. 2 is the power distribution protective device block diagram of the present invention；
Fig. 3 is the local discharge detection device block diagram of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
As Figure 1-3, this power system, including power supply unit, power supply unit be connected with partial discharge monitoring device and
Power distribution protective device, the shelf depreciation situation of partial discharge monitoring device real time on-line monitoring power supply unit, power distribution protective device
The operation short circuit current of real-time monitoring power equipment, when the operation short circuit current of monitoring reaches prospective short circuit current, and during short circuit
Between beyond the first pre-set threshold value when, power distribution protective device cut off power equipment power supply.
Power distribution protective device, including distribution controller, distribution controller is connected with short-circuit protector, distribution controller according to
The prospective short circuit current of the parameter determination power supply unit of power equipment, the operation short circuit of short-circuit protector real-time monitoring power equipment
Electric current, when the operation short circuit current of monitoring reaches prospective short circuit current, and when short circuit duration exceeds the first pre-set threshold value, by aobvious
Show that device is shown, and short-circuit protector cuts off the power supply of power equipment.
Short-circuit protector includes automatic circuit and sectionaliser, and distribution controller realizes closing of short circuit current using sectionaliser,
Distribution controller utilizes automatic circuit to excise short circuit current, and automatic circuit pre-set coincidence number of times, when the actual coincidence time of switch
When number reaches setting value and switchs board gate-dividing state, then locking automatic closing, isolated fault circuit, automatic circuit is provided with interval
In the cycle, gap periods are the time interval of automatic circuit each division operation, and the division operation of sectionaliser is decided by line voltage distribution, opens
The power supply closed is separating brake, then closes a floodgate after incoming call.
According to the maximum short circuit current of power equipment, determine quick-break one sub-value of power equipment, wherein quick-break one sub-value with
Maximum short circuit current is linear, and maximum short circuit current is maximum short using directly maximum transformator being placed in the calculating of route head end
Road electric current, the supply line of power supply unit is connected with protection system to earth, and protection system to earth connects when generation power supply unit touches shell
During earth fault, the earth resistance of earth resistance and protection system to earth that earth current passes through power supply unit forms loop, and
Produce pressure drop on two resistance, reduce institute on power supply unit shell with voltage.
Using current quick it is stipulated that under maximum operational mode during three-phase shortcircuit, protection domain is maximum, is lmax,
Under minimum operational mode during line to line fault, protection domain is minimum, is lmin, wherein, under minimum operational mode, fast tripping protection
The relative value of scope meets:
In formula: k1rel-- safety factor；Line end three-phase shortcircuit stable state electricity under i2k3.max-- maximum operational mode
Stream；Iopk-- protection device one-off electric current；Es-- system reference voltage；Under xs.max-- system maximum operational mode
Little equivalent impedance, current quick scope includes the end of lower bar circuit or power equipment, the action current of protection seting
The overload electric current of circuit should be escaped, when supply line's imbalance of three-phase voltage rate is more than target setting, and prolong beyond imbalance
When the time after, controller control start Voltage unbalance protection, determine three-phase piezoelectricity unbalance factor, using setting capacitor device
Realize, some group capacitor devices are carried out star-star connection mode connection, the voltage power taking case of unstable voltage protection
The open delta voltage of group.
Controller is put in the local discharge detection device office of inclusion, and office puts controller and is connected with amplification sample circuit, amplifies sampling
Circuit is connected with a/d change-over circuit, and a/d change-over circuit is connected with ultrasonic sensor and pulse generator, office put controller and
A/d change-over circuit is connected with memorizer, and office puts controller and is connected with display.
Pulse generator produces instantaneous voltage change at measurement equipment two ends to be checked, and the change of this instantaneous voltage produces in the loop
Pulse current, by this impulse circuit, impedance produces pulse voltage after testing, is shown by display, moment after amplifier
Change in voltage is coupled to be capacitively coupled to detection impedance, produces pulse current in loop, and impedance produces arteries and veins to pulse current after testing
Rush voltage, between ultrasonic sensor and a/d change-over circuit, be provided with front-end processing circuit, ultrasound wave is passed by front-end processing circuit
The signal that sensor receives carries out Phototube Coupling, and then amplified sample circuit is amplified sampling processing, when sampled result exceeds
During pre-set threshold value, point out there is partial discharge phenomenon.
Ultrasonic sensor includes housing and is arranged at damping block in housing, and damping block bottom is provided with piezo crystals
Piece, piezoelectric chip bottom is provided with protecting film, is provided with binding post above damping block, and binding post is connected with conductive lever, conductive
Screw portion runs through housing, and office puts controller and transmits the partial enlargement parameter of measurement equipment to be checked to server, server statistics
The minimum discharge cycle of measurement equipment to be checked and maximum pd quantity, office puts controller and is connected with alarm unit, each minimum electric discharge week
Phase, office puts controller and controls alarm unit to carry out police instruction, sets up the corresponding linear relationship of ultrasonic signal and discharge capacity, root
Determine discharge capacity maximum according to corresponding relation and ultrasonic signal amplitude.
Determine discharge capacity maximum first, the feedback according to ultrasonic sensor first, controller is put by ultrasonic signal in office
Amplitude, frequency and discharge cycle determine discharge waveform, display virtual oscillography shows discharge waveform.
Amplify sample circuit to input by signalling channel receipt signal, local discharge signal is enlarged into level signal, puts
Big sample circuit passes through signal and receives reference signal by reference to signal, exports after frequency spectrum migration.
The present invention passes through to estimate prospective short circuit current, and quick-break current value, is up to prospective short circuit current shortly and achieves
Auto-cutout is protected；Meanwhile, it is additionally provided with Voltage unbalance protection, determine three-phase voltage not by the unbalance factor of three-phase piezoelectricity
The target setting of balanced ratio；The present invention is capable of power distribution protection it is ensured that the balance movement of power equipment；By supersonic sensing
Device and the local discharge signal of pulse generator real-time detection power equipment, and by a series of process, make shelf depreciation ripple
Shape is shown over the display, can effectively learn the shelf depreciation situation of power equipment, thus the personnel that maintain easily enter
The maintenance of row power equipment, it is to avoid the fault being difficult to retrieve in power equipment, and even causes security incident.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of power system, including power supply unit it is characterised in that described power supply unit is connected with partial discharge monitoring device
And power distribution protective device, the shelf depreciation situation of described partial discharge monitoring device real time on-line monitoring power supply unit, described join
The operation short circuit current of electrical protective device real-time monitoring power equipment, when the operation short circuit current of monitoring reaches expected short circuit electricity
Stream, and when short circuit duration exceeds the first pre-set threshold value, described power distribution protective device cuts off the power supply of power equipment.
2. power system according to claim 1 is it is characterised in that described power distribution protective device, including distribution controller,
Described distribution controller is connected with short-circuit protector, and described distribution controller is according to the parameter determination power supply unit of power equipment
Prospective short circuit current, the operation short circuit current of described short-circuit protector real-time monitoring power equipment, when the operation short circuit electricity of monitoring
Stream reaches prospective short circuit current, and when short circuit duration exceeds the first pre-set threshold value, is shown by display, and described short circuit
Protector cuts off the power supply of power equipment.
3. power system according to claim 2, it is characterised in that short-circuit protector includes automatic circuit and sectionaliser, is joined
Electric controller realizes closing of short circuit current using sectionaliser, and distribution controller utilizes automatic circuit to excise short circuit current, automatic circuit
Pre-set coincidence number of times, when the actual coincidence number of times of switch reaches setting value and switchs board gate-dividing state, then locking
Automatic closing, isolated fault circuit, automatic circuit is provided with gap periods, and gap periods are the time of automatic circuit each division operation
Interval, the division operation of sectionaliser is decided by line voltage distribution, and the power supply of switch is separating brake, then closes a floodgate after incoming call.
4. power system according to claim 3 is it is characterised in that according to the maximum short circuit current of power equipment, determine
Quick-break one sub-value of power equipment, wherein quick-break one sub-value is linear with maximum short circuit current, and maximum short circuit current adopts
Directly maximum transformator is placed in route head end and calculates maximum short circuit current, the supply line of described power supply unit is connected with ground connection
Protection system, when occurring power supply unit to touch shell earth fault, earth current passes through power supply unit to described protection system to earth
The earth resistance of earth resistance and protection system to earth forms loop, and produces pressure drop on two resistance, reduces outside power supply unit
On shell, institute is with voltage.
5. power system according to claim 4 is it is characterised in that utilize current quick it is stipulated that running maximum
Under mode during three-phase shortcircuit, protection domain is maximum, is lmax, and under minimum operational mode during line to line fault, protection domain is minimum,
For lmin, wherein, under minimum operational mode, the relative value of fast tripping protection scope meets:
In formula: k1rel-- safety factor；Line end three-phase shortcircuit steady-state current under i2k3.max-- maximum operational mode；
Iopk-- protection device one-off electric current；Es-- system reference voltage；Minimum under xs.max-- system maximum operational mode
Equivalent impedance, current quick scope includes the end of lower bar circuit or power equipment, and the action current of protection seting should
Escape the overload electric current of circuit, when supply line's imbalance of three-phase voltage rate is more than target setting, and beyond uneven time delay
After time, controller controls and starts Voltage unbalance protection, determines three-phase piezoelectricity unbalance factor, real using setting capacitor device
Existing, some group capacitor devices are carried out star-star connection mode connection, the voltage power taking case group of unstable voltage protection
Open delta voltage.
6. power system according to claim 5 is it is characterised in that control is put in the described local discharge detection device office of inclusion
Device, described office puts controller and is connected with amplification sample circuit, and described amplification sample circuit is connected with a/d change-over circuit, described a/d
Change-over circuit is connected with ultrasonic sensor and pulse generator, and controller is put in described office and a/d change-over circuit is connected with storage
Device, described office puts controller and is connected with display.
7. power system according to claim 6 is it is characterised in that described pulse generator produces at measurement equipment two ends to be checked
Raw instantaneous voltage change, the change of this instantaneous voltage produces pulse current in the loop, and by this impulse circuit, impedance produces after testing
Pulse voltage, is shown by display after amplifier, and transient voltage change is coupled to be capacitively coupled to detection impedance, returns
Pulse current is produced, impedance produces pulse voltage, described ultrasonic sensor and a/d change-over circuit to pulse current after testing in road
Between be provided with front-end processing circuit, the signal that ultrasonic sensor receives is carried out Phototube Coupling by described front-end processing circuit,
Then amplified sample circuit is amplified sampling processing, when sampled result exceeds pre-set threshold value, points out there is shelf depreciation
Phenomenon.
8. power system according to claim 7 is it is characterised in that described ultrasonic sensor includes housing and setting
Damping block in described housing, described damping block bottom is provided with piezoelectric chip, and described piezoelectric chip bottom is provided with protection
Film, is provided with binding post above described damping block, and described binding post is connected with conductive lever, and described conductive lever part runs through institute
State housing, described office puts controller and transmits the partial enlargement parameter of measurement equipment to be checked to server, and described server statistics are treated
The minimum discharge cycle of testing equipment and maximum pd quantity, office puts controller and is connected with alarm unit, each minimum discharge cycle,
Office puts controller and controls alarm unit to carry out police instruction, sets up the corresponding linear relationship of ultrasonic signal and discharge capacity, according to
Corresponding relation and ultrasonic signal amplitude determine discharge capacity maximum.
9. power system according to claim 8 is it is characterised in that determine discharge capacity maximum first, first according to ultrasonic
The feedback of wave sensor, office puts controller and determines discharge waveform by the amplitude of ultrasonic signal, frequency and discharge cycle, described aobvious
Show device virtual oscillography display discharge waveform.
10. power system according to claim 9 is it is characterised in that described amplification sample circuit is connect by signalling channel
Receive signal input, local discharge signal is enlarged into level signal, amplify sample circuit and pass through signal by reference to signal reception
Reference signal, exports after frequency spectrum migration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677557.8A CN106374438A (en) | 2016-08-16 | 2016-08-16 | Power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677557.8A CN106374438A (en) | 2016-08-16 | 2016-08-16 | Power system |
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| Publication Number | Publication Date |
|---|---|
| CN106374438A true CN106374438A (en) | 2017-02-01 |
Family
ID=57879484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610677557.8A Pending CN106374438A (en) | 2016-08-16 | 2016-08-16 | Power system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107742880A (en) * | 2017-11-24 | 2018-02-27 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of intelligent DC protection device and guard method |
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| CN107742880B (en) * | 2017-11-24 | 2024-04-16 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Intelligent direct current protection device and protection method |
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Application publication date: 20170201 |