CN108429247A - A kind of intelligent power system current protection system - Google Patents
A kind of intelligent power system current protection system Download PDFInfo
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- CN108429247A CN108429247A CN201810272126.2A CN201810272126A CN108429247A CN 108429247 A CN108429247 A CN 108429247A CN 201810272126 A CN201810272126 A CN 201810272126A CN 108429247 A CN108429247 A CN 108429247A
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- 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention belongs to field of power, disclose a kind of intelligent power system current protection system；The intelligent power system current protection system, including monitoring module, current transformer, controller, wireless communication module, remote control unit, relay driving module, alarm unit, residual current circuit breaker；Monitoring module is electrically connected current transformer, current transformer is electrically connected controller, and controller is electrically connected wireless communication module, and controller is electrically connected relay driving module, remote control unit is wirelessly connected wireless communication module, and relay driving module is electrically connected to alarm unit, residual current circuit breaker.The configuration of the present invention is simple; the real time monitoring and overload protection to electric current are realized by ball bearing made; it can not only be controlled at the scene; it can also be by remotely being monitored in real time and being arranged; the protection system is easy for installation; ensure to be cut off in time when electric current is more than preset range, avoids the damage to electronic device, provide sufficient protection.
Description
Technical field
The invention belongs to field of power more particularly to a kind of intelligent power system current protection systems.
Background technology
Currently, the prior art commonly used in the trade is such：
The key component of current protective device relay protection needs to acquire signal on the line, should ensure signal acquisition
Precision, ensure the unobstructed of electric current again, ensure the rapid of each step action.Currently, usually being adopted to residual current circuit breaker
With no-fuse switch, electric current can be cut off when current overload, is closed a switch when needing to be re-energised, but its there is also to mistake
Carrying few electric current cannot be cut off in time, and sometimes due to the defects of current protection effect is lost after sheet metal aging.
The development of sensor technology brings great variety to people’s lives.Sonic sensor is exactly that one kind is widely used
Sensor.The basic principle of sonic sensor is：When wave is propagated in a certain specific structure, disperse characteristic (i.e. wave number with
Relationship between frequency) it is certain.When external physical quantity changes, such as temperature, electric field, magnetic field and architecture quality hair
Changing, this variation can change the variation of the propagation characteristic such as velocity of wave or frequency of wave, therefore, by the wave number of wave and frequency it
Between the variation of relationship counter can push away the change of external physical quantity.So theoretically calculating the disperse that wave is propagated in specific structure
Relationship (relationship i.e. between wave number and frequency) can instruct the actual design of sonic sensor.Sonic sensor is in the power system
Be widely used field
The Dispersion Equation of wave is generally a binary transcendental equation about wave number and frequency, when solving in complex wave number field more
When the solution for the relationship of dissipating, equation becomes more complicated ternary transcendental equation, and the coefficient of Dispersion Equation may contain plural number,
Therefore the solution of such issues that is highly difficult, generally can only solve disperse relationship to the case where extremely special very simple, this is right
In the analysis of the sonic sensor of various different structures be far from being enough.
In conclusion problem of the existing technology is：
It is existing that electric current can be cut off when current overload to residual current circuit breaker generally use no-fuse switch, need weight
It is new to close a switch when being powered, but it is there is also cannot be cut off in time to overloading few electric current, and sometimes due to gold
The defects of current protection acts on is lost after belonging to piece aging.
Solve the difficulty and meaning of above-mentioned technical problem：
The configuration of the present invention is simple realizes the real time monitoring and overload protection to electric current by ball bearing made, can not only
It controls at the scene, moreover it is possible to by remotely being monitored in real time and being arranged.
And method provided by the invention is utilized, it can efficiently, widely solve various table sound waves or bulk acoustic wave resonator, filter
The dispersion equation and frequency characteristic of the structures medium wave propagation problem such as wave device and sensor.It, can be very after solution obtains disperse relationship
It is easy to solve the physical field in the sensors such as corresponding displacement field, stress field.This selects the operation mode of sensor, sensing
The structure design of device provides strong guidance
Invention content
In view of the problems of the existing technology, the present invention provides a kind of intelligent power system current protection systems.
The invention is realized in this way the present invention provides a kind of intelligent power system current protection system, including monitoring mould
Block, current transformer, controller, wireless communication module, remote control unit, relay driving module, alarm unit, residual current are disconnected
Road device；
Monitoring module is electrically connected current transformer, the input current for detecting the external power supply；
Data acquisition module is electrically connected monitoring module, for acquiring the whole of each adaptive Current Protection in protection zone
Definite value and protection act virtual condition, and the current setting of collected each adaptive guard is sent to protection supersaturated designs
Module is adjusted, collected each protection act virtual condition is sent to protection collaborative e-commerce function generation module；
Protection supersaturated designs adjust module, for the setting valve according to each adaptive Current Protection, calculate each adaptive
The supersaturated designs of current protection, then by the supersaturated designs of each adaptive Current Protection be sent to protection collaborative e-commerce function generation module and
Protect collaborative e-commerce expectation function generation module；
Collaborative e-commerce function generation module is protected to be used for according to the virtual condition of each adaptive Current Protection and each adaptive
The supersaturated designs of induced current protection, calculate the protection collaborative e-commerce functional value of each circuit；
Collaborative e-commerce expectation function generation module is protected, for calculating each item according to the supersaturated designs of each adaptive Current Protection
The protection collaborative e-commerce expectation function value of circuit；
Current transformer is electrically connected controller, for exporting detection electric current corresponding with input current；
Controller is electrically connected wireless communication module, for receiving wireless control directives and sending the numerical value of detection electric current；Institute
It states controller and is also electrically connected relay driving module, for sending control instruction；
Remote control unit, be wirelessly connected wireless communication module, for send wireless control directives and receive detection electric current,
Voltage value；
Relay driving module is electrically connected to alarm unit, residual current circuit breaker, for controlling alarm unit and residue
Tie breaker；
For the monitoring module when detecting that the electric current is more than secure threshold, controller is by wireless communication module to institute
It states remote control unit and sends over-current signal；
The monitoring module is integrated with sonic sensor；In the sonic sensor sensed current signal, disperse side is utilized
Disperse characteristic of the journey modulus value in the convergence of zero crossings solves sonic sensor, to real wave-number domain and the case where complex wave number field
It is applicable in；The minimum point of the Dispersion Equation modulus value in additional space is relatively found out using scanning element.
Further, in the sonic sensor sensed current signal, further include：It is determined and is scanned according to the solution room of wave number
The form of unit, including：
The Dispersion Equation that sound wave is propagated in different structure is binary transcendental equation f (ω, ξ)=0, when in real wave-number domain and
Pure when needing to solve this equation in the case of wave number, frequencies omega and wave number ξ constitute a two dimensional surface, and Equation f (ω, ξ)=0
Solution be then curve in a rule plane, any one for selecting in fixed frequency or wave number can obtain ω-ξ two dimensional surfaces
Interior straight line, then this straight line is scanned with line element, intersection point of the line element in ω-ξ two dimensional surfaces with smeared cracking
It is unique；
When solving this equation in complex wave number field, wave number ξ is plural number, and it is real number to enable ξ=a+bi, a, b, then equation g
(a, b, ξ)=f (ω, ξ)=0；
Equation becomes a, the ternary transcendental equation of b, ξ, and the real part a of wave number, imaginary part b and frequencies omega constitute a three-dimensional
Space, and the solution of equation g (a, b, ξ)=0 is the curve in a rule space, selects the real part a of fixed wave number, imaginary part b and
Any one in frequencies omega can obtain a plane in the spaces a-b- ξ, then be scanned to this plane with face element, and face element exists
With the intersection point of smeared cracking it is unique in the three dimensions of a-b- ξ.
Further, the minimum point that the Dispersion Equation modulus value in additional space is relatively found out using scanning element, packet
It includes：
After choosing corresponding surface sweeping infinitesimal, take step-length to divide infinitesimal, compare the modulus value of equation on partitioning site | f
(ω, ξ) | size, find out the node that Dispersion Equation modulus value is minimized, if node do not take scanning infinitesimal boundary node
On, then this node is modulus value minimum point, then sequentially enters next scanning infinitesimal, and new scanning infinitesimal need to be swept by
The segment boundary node retouched in infinitesimal is included in inside；Finally, with the initial value of fixed frequency or wave number of a certain step-size change,
Find out the modulus value minimum point of all Dispersion Equations in space.
Further, it when the remote control unit receives over-current signal, is sent to controller by wireless communication module
Instruction, controller receives instruction control relay driving module, and then controls alarm unit and residual current circuit breaker.
Further, the supersaturated designs of each adaptive Current Protection include the I sections supersaturated designs, each of each adaptive Current Protection
The II section supersaturated designs of a adaptive Current Protection and the III section supersaturated designs of each adaptive Current Protection；
The supersaturated designs for calculating each adaptive Current Protection are specially：Using formulaThe I sections of each adaptive Current Protection are calculated to circuit Li effectiveness
Degree；
Using formulaThe II sections of each adaptive Current Protection are calculated to circuit Li supersaturated designs；
Wherein,For adaptive Current Protection j II sections for circuit Li effective distance equivalent impedance, and
ZLiFor circuit LiImpedance；
ZLi1For circuit Li1Impedance and Li1For LiHigher level's circuit；
ZSFor the comprehensive impedance of system power supply side；
For the setting valve of the II sections of adaptive Current Protection j；
KdFor fault type coefficient；
ESFor the equivalent phase potential of system；
N is the circuit number in the protection domain of adaptive Current Protection j；
N is the number of lines in the protection domain of adaptive Current Protection j；
Using formulaThe III sections of each adaptive Current Protection are calculated to circuit LiSupersaturated designs；
Wherein,For adaptive Current Protection j III sections for circuit LiEffective distance equivalent impedance and
ZLi2For circuit Li2Impedance and Li2For Li1Higher level's circuit；
For the setting valve of the III sections of adaptive Current Protection j；
The protection collaborative e-commerce functional value for calculating each circuit uses formula：
Wherein,For adaptive Current Protection j I sections to circuit LiSupersaturated designs；
For adaptive Current Protection j II sections to circuit Li supersaturated designs；
For adaptive Current Protection j III sections to circuit Li supersaturated designs；
The I section actual condition values of adaptive Current Protection j after occurring for failure；
The II section actual condition values of adaptive Current Protection j after occurring for failure；
The III section actual condition values of adaptive Current Protection j after occurring for failure；
When virtual condition is action state, actual condition value takes 1；When virtual condition is non-action state, practical shape
State value takes 0；
BI is the I hop count mesh of adaptive Current Protection；
BII is the II hop count mesh of adaptive Current Protection；
BIII is the III hop count mesh of adaptive Current Protection.
Advantages of the present invention and good effect are：
The configuration of the present invention is simple realizes the real time monitoring and overload protection to electric current by ball bearing made, can not only
It controls at the scene, moreover it is possible to which, by remotely being monitored in real time and being arranged, the protection system is easy for installation, it is ensured that in electric current more than pre-
Determine to be cut off in time when range, avoid the damage to electronic device, provides sufficient protection.
The operating parameter of circuit and operating parameter status signal are uploaded to the storage of Cloud Server terminal by the present invention in real time,
Remote monitoring terminal real time access Cloud Server terminal and the operating parameter and operating parameter status signal for obtaining distribution transformer,
Detect whether the operating parameter status signal is abnormal signal, if so, sending out alarm.
In the sonic sensor detection technique of the present invention, some section of equation modulus value minimalization is obtained in scanning infinitesimal
After point, centered on this node, adjacent node is boundary node, forms new infinitesimal, and suitable step-length is taken to divide this infinitesimal, meter
The equation modulus value on new infinitesimal node is calculated, the node for obtaining and being minimized is compared.It repeats the above process, a series of moulds can be obtained
The minimum value node that value is successively decreased, if the modulus value of initial minimum value node be intended to than the modulus value of upper newest minimum value node it is infinite,
Then this minimum value node is zero, this shows in this acoustic wave sensor structure, wave can according to the point wave number and frequency into
Row is propagated.If being intended to a limited big constant, this minimum value node is not zero a little, this shows in this sonic sensor
In structure, wave can not possibly be propagated according to the wave number of the point with frequency.This sound wave sensing can be controlled using convergent step number
The solving precision of possible wave number and frequency when device medium wave propagation.The Dispersion Equation of wave is generally one about wave number and frequency
Binary transcendental equation, when solving the solution of disperse relationship in complex wave number field, equation becomes more complicated ternary transcendental equation, and
The coefficient of Dispersion Equation may contain plural number, therefore such issues that solution it is highly difficult, generally can only be to extremely special ten
Simple situation is divided to solve disperse relationship, this is far from being enough for the analysis of the sonic sensor of various different structures；
And method provided by the invention is utilized, it can efficiently, widely solve various table sound wave or bulk acoustic wave resonators, filter and biography
The dispersion equation and frequency characteristic of the structures medium wave propagation problem such as sensor.After solution obtains disperse relationship, it can be easy to solve
Go out the physical field in the sensors such as corresponding displacement field, stress field；This selects the operation mode of sensor, the structure of sensor
Design provides strong guidance.
Description of the drawings
Fig. 1 is that the present invention implements the intelligent power system current protection system structure diagram provided；
In figure：1, monitoring module；2, current transformer；3, controller；4, wireless communication module；5, remote control unit；6, after
Electrical equipment drive module；7, alarm unit；8, residual current circuit breaker.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
It is existing that electric current can be cut off when current overload to residual current circuit breaker generally use no-fuse switch, need weight
It is new to close a switch when being powered, but it is there is also cannot be cut off in time to overloading few electric current, and sometimes due to gold
The defects of current protection acts on is lost after belonging to piece aging.
Fig. 1, the present invention implement the intelligent power system current protection system provided, including monitoring module 1, current transformer 2, control
Device 3 processed, wireless communication module 4, remote control unit 5, relay driving module 6, alarm unit 7, residual current circuit breaker 8；
The monitoring module 1 is electrically connected current transformer 2, the input current for detecting the external power supply；
Data acquisition module is electrically connected monitoring module, for acquiring the whole of each adaptive Current Protection in protection zone
Definite value and protection act virtual condition, and the current setting of collected each adaptive guard is sent to protection supersaturated designs
Module is adjusted, collected each protection act virtual condition is sent to protection collaborative e-commerce function generation module；
Protection supersaturated designs adjust module, for the setting valve according to each adaptive Current Protection, calculate each adaptive
The supersaturated designs of current protection, then by the supersaturated designs of each adaptive Current Protection be sent to protection collaborative e-commerce function generation module and
Protect collaborative e-commerce expectation function generation module；
Collaborative e-commerce function generation module is protected to be used for according to the virtual condition of each adaptive Current Protection and each adaptive
The supersaturated designs of induced current protection, calculate the protection collaborative e-commerce functional value of each circuit；
Collaborative e-commerce expectation function generation module is protected, for calculating each item according to the supersaturated designs of each adaptive Current Protection
The protection collaborative e-commerce expectation function value of circuit；
The current transformer 2 is electrically connected controller 3, for exporting detection electric current corresponding with input current；
The controller 3 is electrically connected wireless communication module 4, for receiving wireless control directives and sending the number of detection electric current
Value；
The controller 3 is electrically connected relay driving module 6, for sending control instruction；
The remote control unit 5 is wirelessly connected wireless communication module 4, is detected for sending wireless control directives and receiving
Electric current, voltage value；
The relay driving module 6 is electrically connected to alarm unit 7, residual current circuit breaker 8, for controlling alarm unit
7 and residual current circuit breaker 8；
For the monitoring module 1 when detecting that the electric current is more than secure threshold, controller 3 passes through wireless communication module 4
Over-current signal is sent to the remote control unit 5.
When the remote control unit 5 receives over-current signal, is sent and is instructed to controller 3 by wireless communication module 4,
Controller 3 receives instruction control relay driving module 6, and then controls alarm unit 7 and residual current circuit breaker 8.
The monitoring module is integrated with sonic sensor；In the sonic sensor sensed current signal, disperse side is utilized
Disperse characteristic of the journey modulus value in the convergence of zero crossings solves sonic sensor, to real wave-number domain and the case where complex wave number field
It is applicable in；The minimum point of the Dispersion Equation modulus value in additional space is relatively found out using scanning element.
In the sonic sensor sensed current signal, further include：Scanning element is determined according to the solution room of wave number
Form, including：
The Dispersion Equation that sound wave is propagated in different structure is binary transcendental equation f (ω, ξ)=0, when in real wave-number domain and
Pure when needing to solve this equation in the case of wave number, frequencies omega and wave number ξ constitute a two dimensional surface, and Equation f (ω, ξ)=0
Solution be then curve in a rule plane, any one for selecting in fixed frequency or wave number can obtain ω-ξ two dimensional surfaces
Interior straight line, then this straight line is scanned with line element, intersection point of the line element in ω-ξ two dimensional surfaces with smeared cracking
It is unique；
When solving this equation in complex wave number field, wave number ξ is plural number, and it is real number to enable ξ=a+bi, a, b, then equation g
(a, b, ξ)=f (ω, ξ)=0；
Equation becomes a, the ternary transcendental equation of b, ξ, and the real part a of wave number, imaginary part b and frequencies omega constitute a three-dimensional
Space, and the solution of equation g (a, b, ξ)=0 is the curve in a rule space, selects the real part a of fixed wave number, imaginary part b and
Any one in frequencies omega can obtain a plane in the spaces a-b- ξ, then be scanned to this plane with face element, and face element exists
With the intersection point of smeared cracking it is unique in the three dimensions of a-b- ξ.
The minimum point that the Dispersion Equation modulus value in additional space is relatively found out using scanning element, including：
After choosing corresponding surface sweeping infinitesimal, take step-length to divide infinitesimal, compare the modulus value of equation on partitioning site | f
(ω, ξ) | size, find out the node that Dispersion Equation modulus value is minimized, if node do not take scanning infinitesimal boundary node
On, then this node is modulus value minimum point, then sequentially enters next scanning infinitesimal, and new scanning infinitesimal need to be swept by
The segment boundary node retouched in infinitesimal is included in inside；Finally, with the initial value of fixed frequency or wave number of a certain step-size change,
Find out the modulus value minimum point of all Dispersion Equations in space.
When the remote control unit receives over-current signal, is sent and instructed to controller by wireless communication module, control
Device processed receives instruction control relay driving module, and then controls alarm unit and residual current circuit breaker.
Further, the supersaturated designs of each adaptive Current Protection include the I sections supersaturated designs, each of each adaptive Current Protection
The II section supersaturated designs of a adaptive Current Protection and the III section supersaturated designs of each adaptive Current Protection；
The supersaturated designs for calculating each adaptive Current Protection are specially：Using formulaThe I sections of each adaptive Current Protection are calculated to circuit Li effectiveness
Degree；
Using formulaThe II sections of each adaptive Current Protection are calculated to circuit Li supersaturated designs；
Wherein,For adaptive Current Protection j II sections for circuit Li effective distance equivalent impedance, and
ZLiFor circuit LiImpedance；
ZLi1For circuit Li1Impedance and Li1For LiHigher level's circuit；
ZSFor the comprehensive impedance of system power supply side；
For the setting valve of the II sections of adaptive Current Protection j；
KdFor fault type coefficient；
ESFor the equivalent phase potential of system；
N is the circuit number in the protection domain of adaptive Current Protection j；
N is the number of lines in the protection domain of adaptive Current Protection j；
Using formulaThe III sections of each adaptive Current Protection are calculated to circuit LiSupersaturated designs；
Wherein,For adaptive Current Protection j III sections for circuit LiEffective distance equivalent impedance and
ZLi2For circuit Li2Impedance and Li2For Li1Higher level's circuit；
For the setting valve of the III sections of adaptive Current Protection j；
The protection collaborative e-commerce functional value for calculating each circuit uses formula：
Wherein,For adaptive Current Protection j I sections to circuit LiSupersaturated designs；
For adaptive Current Protection j II sections to circuit Li supersaturated designs；
For adaptive Current Protection j III sections to circuit Li supersaturated designs；
The I section actual condition values of adaptive Current Protection j after occurring for failure；
The II section actual condition values of adaptive Current Protection j after occurring for failure；
The III section actual condition values of adaptive Current Protection j after occurring for failure；
When virtual condition is action state, actual condition value takes 1；When virtual condition is non-action state, practical shape
State value takes 0；
BI is the I hop count mesh of adaptive Current Protection；
BII is the II hop count mesh of adaptive Current Protection；
BIII is the III hop count mesh of adaptive Current Protection.
The operation principle of the present invention：
For monitoring module 1 when detecting that the electric current is more than secure threshold, controller 3 is by wireless communication module 4 to institute
It states remote control unit 5 and sends over-current signal.When process control unit 5 receives over-current signal, by wireless communication module 4 to control
Device 3 processed sends instruction, and controller 3 receives instruction control relay driving module 6, and then controls alarm unit 7 and residual current
Breaker 8 makes the work of alarm unit 7 and residual current circuit breaker 8 cut off circuit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (5)
1. a kind of intelligent power system current protection system, which is characterized in that the intelligent power system current protection system includes：
Monitoring module is electrically connected current transformer, the input current for detecting the external power supply；
Data acquisition module is electrically connected monitoring module, the setting valve for acquiring each adaptive Current Protection in protection zone
With protection act virtual condition, and by the current setting of collected each adaptive guard be sent to protection supersaturated designs adjust
Collected each protection act virtual condition is sent to protection collaborative e-commerce function generation module by module；
Protection supersaturated designs adjust module, for the setting valve according to each adaptive Current Protection, calculate each self-adaptive current
The supersaturated designs of protection, then the supersaturated designs of each adaptive Current Protection are sent to protection collaborative e-commerce function generation module and protection
Collaborative e-commerce expectation function generation module；
Collaborative e-commerce function generation module is protected to be used for the virtual condition according to each adaptive Current Protection and each adaptive electricity
The supersaturated designs of protection are flowed, calculate the protection collaborative e-commerce functional value of each circuit, then by the protection collaborative e-commerce functional value of each circuit
It is sent to fault identification module；
Collaborative e-commerce expectation function generation module is protected, for calculating each circuit according to the supersaturated designs of each adaptive Current Protection
Protection collaborative e-commerce expectation function value；
Current transformer is electrically connected controller, for exporting detection electric current corresponding with input current；
Controller is electrically connected wireless communication module, for receiving wireless control directives and sending the numerical value of detection electric current；The control
Device processed is also electrically connected relay driving module, for sending control instruction；
Remote control unit is wirelessly connected wireless communication module, for sending wireless control directives and receiving detection electric current, voltage
Numerical value；
Relay driving module is electrically connected to alarm unit, residual current circuit breaker, for controlling alarm unit and residual current
Breaker；
For the monitoring module when detecting that the electric current is more than secure threshold, controller is by wireless communication module to described remote
Process control unit sends over-current signal；
The monitoring module is integrated with sonic sensor；In the sonic sensor sensed current signal, Dispersion Equation mould is utilized
The disperse characteristic being worth in the convergence of zero crossings solves sonic sensor, it is suitable to real wave-number domain and the case where complex wave number field
With；The minimum point of the Dispersion Equation modulus value in additional space is relatively found out using scanning element.
2. intelligent power system current protection system as described in claim 1, which is characterized in that the sonic sensor detection electricity
It flows in signal, further includes：The form of scanning element is determined according to the solution room of wave number, including：
The Dispersion Equation that sound wave is propagated in different structure is binary transcendental equation f (ω, ξ)=0, when in real wave-number domain and pure need
When solving this equation in the case of wave number, frequencies omega and wave number ξ constitute a two dimensional surface, and the solution of Equation f (ω, ξ)=0
It is then the curve in a rule plane, any one in selection fixed frequency or wave number can obtain in ω-ξ two dimensional surfaces
Straight line, then this straight line is scanned with line element, line element is only with the intersection point of smeared cracking in ω-ξ two dimensional surfaces
One；
When solving this equation in complex wave number field, wave number ξ be plural number, it is real number to enable ξ=a+bi, a, b, then equation g (a, b,
ξ)=f (ω, ξ)=0；
Equation becomes a, the ternary transcendental equation of b, ξ, and the real part a of wave number, imaginary part b and frequencies omega constitute a three-dimensional space
Between, and the solution of equation g (a, b, ξ)=0 is the curve in a rule space, selects the real part a of fixed wave number, imaginary part b and frequency
Any one in rate ω can obtain a plane in the spaces a-b- ξ, then be scanned to this plane with face element, and face element is in a-
With the intersection point of smeared cracking it is unique in the three dimensions of b- ξ.
3. intelligent power system current protection system as described in claim 1, which is characterized in that described to be compared using scanning element
The minimum point of the Dispersion Equation modulus value in additional space is found out, including：
After choosing corresponding surface sweeping infinitesimal, take step-length to divide infinitesimal, compare the modulus value of equation on partitioning site | f (ω, ξ) |
Size, find out the node that Dispersion Equation modulus value is minimized, if node do not take scanning infinitesimal boundary node on, this section
Point is modulus value minimum point, then sequentially enters next scanning infinitesimal, and new scanning infinitesimal need to be scanned upper one in infinitesimal
Segment boundary node be included in inside；Finally, with the initial value of fixed frequency or wave number of a certain step-size change, space is found out
In all Dispersion Equations modulus value minimum point.
4. intelligent power system current protection system as described in claim 1, which is characterized in that the remote control unit receives
It when to over-current signal, is sent and is instructed to controller by wireless communication module, controller receives instruction control relay driving mould
Block, and then control alarm unit and residual current circuit breaker.
5. intelligent power system current protection system as described in claim 1, which is characterized in that each adaptive Current Protection
Supersaturated designs include the I sections supersaturated designs of each adaptive Current Protection, the II section supersaturated designs of each adaptive Current Protection and each
The III section supersaturated designs of adaptive Current Protection；
The supersaturated designs for calculating each adaptive Current Protection are specially：Using formulaThe I sections of each adaptive Current Protection are calculated to circuit Li effectiveness
Degree；
Using formulaThe II sections of each adaptive Current Protection are calculated to circuit Li supersaturated designs；
Wherein,For adaptive Current Protection j II sections for circuit Li effective distance equivalent impedance, and
ZLiFor circuit LiImpedance；
ZLi1For circuit Li1Impedance and Li1For LiHigher level's circuit；
ZSFor the comprehensive impedance of system power supply side；
For the setting valve of the II sections of adaptive Current Protection j；
KdFor fault type coefficient；
ESFor the equivalent phase potential of system；
N is the circuit number in the protection domain of adaptive Current Protection j；
N is the number of lines in the protection domain of adaptive Current Protection j；
Using formulaThe III sections of each adaptive Current Protection are calculated to circuit LiSupersaturated designs；
Wherein,For adaptive Current Protection j III sections for circuit LiEffective distance equivalent impedance and
ZLi2For circuit Li2Impedance and Li2For Li1Higher level's circuit；
For the setting valve of the III sections of adaptive Current Protection j；
The protection collaborative e-commerce functional value for calculating each circuit uses formula：
Wherein,For adaptive Current Protection j I sections to circuit LiSupersaturated designs；
For adaptive Current Protection j II sections to circuit Li supersaturated designs；
For adaptive Current Protection j III sections to circuit Li supersaturated designs；
The I section actual condition values of adaptive Current Protection j after occurring for failure；
The II section actual condition values of adaptive Current Protection j after occurring for failure；
The III section actual condition values of adaptive Current Protection j after occurring for failure；
When virtual condition is action state, actual condition value takes 1；When virtual condition is non-action state, actual condition value
Take 0；
BI is the I hop count mesh of adaptive Current Protection；
BII is the II hop count mesh of adaptive Current Protection；
BIII is the III hop count mesh of adaptive Current Protection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810272126.2A CN108429247A (en) | 2018-03-29 | 2018-03-29 | A kind of intelligent power system current protection system |
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| CN201810272126.2A CN108429247A (en) | 2018-03-29 | 2018-03-29 | A kind of intelligent power system current protection system |
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| CN201810272126.2A Pending CN108429247A (en) | 2018-03-29 | 2018-03-29 | A kind of intelligent power system current protection system |
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| CN103779852A (en) * | 2014-03-01 | 2014-05-07 | 华北电力大学 | Regional protection system based on adaptive current protection associated factor and method thereof |
| CN103795031A (en) * | 2014-02-28 | 2014-05-14 | 华北电力大学 | Substation area protection system and method based on current protection integration factors |
| CN104577952A (en) * | 2013-10-21 | 2015-04-29 | 成都天牧信息技术有限公司 | Remote current circuit break protection system |
| CN105590025A (en) * | 2015-12-16 | 2016-05-18 | 南京航空航天大学 | Method for solving numerical value of dispersion curve in sonic sensor |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577952A (en) * | 2013-10-21 | 2015-04-29 | 成都天牧信息技术有限公司 | Remote current circuit break protection system |
| CN103795031A (en) * | 2014-02-28 | 2014-05-14 | 华北电力大学 | Substation area protection system and method based on current protection integration factors |
| CN103779852A (en) * | 2014-03-01 | 2014-05-07 | 华北电力大学 | Regional protection system based on adaptive current protection associated factor and method thereof |
| CN105590025A (en) * | 2015-12-16 | 2016-05-18 | 南京航空航天大学 | Method for solving numerical value of dispersion curve in sonic sensor |
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Application publication date: 20180821 |