CN106329723A - Multifunctional electric power equipment monitoring system - Google Patents
Multifunctional electric power equipment monitoring system Download PDFInfo
- Publication number
- CN106329723A CN106329723A CN201610677546.XA CN201610677546A CN106329723A CN 106329723 A CN106329723 A CN 106329723A CN 201610677546 A CN201610677546 A CN 201610677546A CN 106329723 A CN106329723 A CN 106329723A
- Authority
- CN
- China
- Prior art keywords
- power
- phase
- voltage
- current
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 33
- 238000001514 detection method Methods 0.000 claims description 20
- 230000001012 protector Effects 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 11
- 238000012806 monitoring device Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 claims description 3
- 241000208340 Araliaceae Species 0.000 claims 1
- 244000068988 Glycine max Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000021615 conjugation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000819 phase cycle Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- H02J13/0017—
-
- 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
- G01R31/1209—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 using acoustic measurements
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Acoustics & Sound (AREA)
- Human Computer Interaction (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention provides a multifunctional electric power equipment monitoring system. The multifunctional electric power equipment monitoring system comprises electric power equipment, wherein the electric power equipment is connected with a partial discharge monitoring apparatus, a power distribution protection apparatus and a reactive compensation apparatus, wherein the partial discharge monitoring apparatus, the power distribution protection apparatus and the reactive compensation apparatus are connected with a central controller; and the central controller realizes electric quantity monitoring, power distribution protection and reactive compensation of the electric power equipment. By adoption of the multifunctional electric power equipment monitoring system, reactive compensation of a power grid can be realized; meanwhile, power distribution can be achieved; and in addition, a partial discharge phenomenon can be avoided and balanced operation of the equipment is ensured while the power factor is ensured and electric energy loss is reduced.
Description
Technical field
The invention belongs to technical field of electric power, particularly to a kind of multifunction power equipment monitoring system.
Background technology
Along with economic fast development, low pressure (exchange is less than 1500V less than 1000V or direct current) distribution system occupies
Leading position, it is that last between power system with end user being connected, is to contact the closest, use equipment with user
A link many, that circuit is the longest, power consumption is maximum, be unable to do without low-voltage distribution everywhere in factory, mine, city, rural area etc.
System, so, reasonable, the safe efficient and stable operation of low-voltage distribution system, the electricity consumption that direct relation users is reliable
Property and power quality, thus low-voltage distribution system distribution line, control equipment etc. are carried out protection and is significant.The lowest
It is press-fitted electric protection many selections breaker of plastic casing, fuse or RCCB, it is achieved quick-break, long delay protection, but much moulds shell
Breaker actuation precision is inadequate, and do not possess real time monitoring signals show, the function such as logout and communication networking；And use
Thermorelay is as motor overload protection and controls element, is limited by element quality, technique, cannot meet growing
Automation technolo requirement.
Strengthen the quality of power supply and energy-saving and cost-reducing impact be particularly significant, take among these Reactive Compensation Mode improve power because of
Number degradation is all effective measure.In power supply system, the raising of power factor is an important technical work,
It is directly connected to the electric energy loss of transmission line of electricity and the economy of power supply, power supply quality.The indemnifying measure of power factor is always
People are paid attention to.Develop high performance power factor compensation device and there is the society of reality, economic benefit.And in power system
In, reactive power to keep balance, otherwise, it will make system voltage decline, time serious, can cause device damage, system break-down.
Additionally, the power factor of network and voltage reduce, make electrical equipment be not fully utilized, promote network capacity to decline,
Loss increases.Therefore, resolve network building out problem, network wastage reducing and energy saving is had particularly important meaning.
Series compensation and shunt compensation can be divided into by power network reactive power compensation mode.Shunt compensation mode can be divided into again electricity
Container group compensates, and adjusts inductance compensation, the phase-shift compensation etc. that phase modifier compensates.The design we shnt capacitor will be used to compensate,
Mainly apply singlechip technology, it is achieved the monitoring to low-voltage power system, complete the measurement of power factor, and according to the data obtained
Carry out the switching of capacitance group, to realize the compensation of the power factor to power system.
Idle compensating control is the core of reactive-load compensation, and its performance directly affects the effect of compensation.It is according to detection
Power factor or reactive power, put into/excise capacitor according to certain control rule, realize circuit is carried out idle benefit
Repay.Having quite a few in low-voltage network is inductive load, and it not only to consume substantial amounts of active power, also to absorb very
Many reactive powers, so that power factor declines, cause reactive power source not enough, and system voltage reduces, and electric energy loss increases, this
Leverage the power supply capacity of electrical network.
Additionally, partial discharge phenomenon is also the main cause affecting power equipment normal operation.
Therefore, a kind of multifunction power equipment monitoring system is needed now badly, it is possible to realize the reactive-load compensation of electrical network, simultaneously energy
Enough carry out power distribution protection, at guarantee power factor, while reducing electric energy loss, it is to avoid phenomenon is put in office, it is ensured that balance of plant is transported
OK.
Summary of the invention
The present invention proposes a kind of multifunction power equipment monitoring system, solves electrical network in prior art because phenomenon is put in office
Damage power equipment caused with short circuit current, and because the electric energy that reactive power causes consumes problem.
The technical scheme is that and be achieved in that: multifunction power equipment monitoring system, including power equipment, electric power
Equipment connects partial discharge monitoring device, power distribution protective device and reactive power compensator, partial discharge monitoring device, distribution
Protection device and reactive power compensator connect has central controller, central controller to realize the electric quantity monitoring of electric power setting, join
Electric protection and reactive-load compensation.
As one preferred embodiment, power distribution protective device, including distribution controller, distribution controller connection has short
Road protector, distribution controller is according to the prospective short circuit current of the parameter determination power supply unit of power equipment, and short-circuit protector is real
Time monitoring power equipment operation short circuit current, when monitoring operation short circuit current reach prospective short circuit current, and short circuit duration
During beyond the first pre-set threshold value, shown by display, and short-circuit protector cuts off the power supply of power equipment.
As one preferred embodiment, short-circuit protector includes automatic circuit and sectionaliser, and distribution controller utilizes and divides
Section device realizes closing of short circuit current, 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 is the time interval of each deciliter of automatic circuit operation, dividing of sectionaliser
Closing operation is decided by line voltage distribution, the power supply of switch i.e. separating brake, then closes a floodgate after incoming call.
As one preferred embodiment, according to the maximum short circuit current of power equipment, the quick-break of power equipment is determined
One sub-value, wherein quick-break one sub-value is linear with maximum short circuit current, and maximum short circuit current uses directly maximum transformation
Device is placed in route head end and calculates maximum short circuit current, and the supply line of power supply unit connects protection system to earth, ground protection
System is when occurring power supply unit to touch shell earth fault, and earth current passes through earth resistance and the protection system to earth of power supply unit
Earth resistance form loop, and on two resistance, produce pressure drop, reduce institute on power supply unit shell with voltage.
As one preferred embodiment, current quick is utilized, it is stipulated that three-phase shortcircuit under maximum operational mode
Time, protection domain is maximum, and for lmax, 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 stable state electricity under I2k3.max--maximum operational mode
Stream；I opk--protection device one-off electric current；Es--system reference voltage；Under XS.Max--system maximum operational mode
Minimum equivalent impedance, current quick scope includes lower bar circuit or the end of power equipment, the action electricity of protection seting
Stream 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 imbalance
After delay time, controller controls to start Voltage unbalance protection, determines three-phase piezoelectricity unbalance factor, uses and arranges capacitor dress
Put realization, some group capacitor devices are carried out star-star connection mode connection, the voltage power taking container dress of unstable voltage protection
Put the open delta voltage of group.
As one preferred embodiment, reactive power compensator, including current transformer and voltage transformer, its feature
Being, current transformer and voltage transformer connect phase detection device, and phase detection device connects compensating controller, mends
Repay controller calculating current transformer and the phase difference value of voltage transformer, determine the power factor of this phase, compensating controller
Connecting power factor display unit and switching control circuit, switching control circuit connects switching capacitance group, voltage transformer
Summation current transformer includes A phase transformer, B phase transformer and C phase transformer respectively, and switching capacitance group includes A phase electric capacity, B phase
Electric capacity and C phase electric capacity.
As one preferred embodiment, phase detection device include the voltage comparator that is connected with voltage transformer with
And the I/V transducer being connected with current transformer, I/V transducer connects voltage transformer, and voltage transformer connects phase demodulation electricity
Road, phase discriminator enumerator, switching control circuit includes a zero-voltage detector, and zero-voltage detector one end is by being connected with door
Putting into order, be connected with door and have multivibrator, zero-voltage detector connects photoelectrical coupler, the other end of photoelectrical coupler
Being connected by resistance and have IGCT, IGCT connects has impulsive quarantine amplifier, power factor display unit to include LED display list
Unit.
As one preferred embodiment, compensating controller connects has power circuit, power circuit to include three-terminal voltage-stabilizing
Device, between input and the earth terminal of three terminal regulator connect have the first electric capacity, the output and ground of three terminal regulator it
Between connect and have the second electric capacity, the input of three terminal regulator connects power supply by rectification circuit and transformator, and compensating controller is pre-
It is provided with the first valve value rate factor, when according to the collection data of phase detection device, compensating controller determines that this phase power factor is big
When this first valve value rate factor, do not compensate；When compensating controller obtains the collection data according to phase detection device
When determining this phase power factor less than this first valve value rate factor, compensate.
This phase merit is determined according to the collection data of phase detection device as a kind of preferred embodiment compensating controller
Rate factor, including being acquired obtaining real-time network signal, through isolation module to three-phase voltage, three-phase current in system simultaneously
Isolation processing after, then carry out N point constant duration and obtain voltage and current sequence, obtain the complex discrete sequence about the time
Row, then carry out Fourier's series, then carry out discrete Fourier change, obtain voltage, current vector with humorous according to its conjugation correction
Relation between ripple, when not considering DC component, derives this phase place harmonic voltage and the virtual value of harmonic current, so that it is determined that have
Merit power, obtains the power factor of this phase place, and compensating controller, according to real-time voltage, electric current, calculates reactive power, determines
Need the idle of compensation, thus according to default Switching Strategy, the part switching capacitance controlled in switching capacitance group carries out idle
Compensate.
As one preferred embodiment, controller is put in the partial discharge monitoring device office of including, office puts controller and connects
Have an amplification sample circuit, amplify sample circuit and connect and have A/D change-over circuit, A/D change-over circuit connect have ultrasonic sensor and
Pulse generator, office puts controller and A/D change-over circuit and connects and have memorizer, office to put controller to connect and have display.
After have employed technique scheme, the invention has the beneficial effects as follows: by reactive power compensator, improve power because of
Number: avoid electromotor to reduce power factor as far as possible and run, prevents from distally loading that conveying is idle causes voltage and power attenuation, should
At user, carry out low power factor limit, i.e. take local reactive power compensation measure；Improve voltage-regulation: load is to reactive requirement
Change, the change of supply terminals voltage can be caused, if this change is adjusted from power end (power plant), can cause
Problem, and the equipment that compensates just plays maintenance supply voltage important function in prescribed limit；The balance of regulating load: when just
When often emerged in operation asymmetrical three-phase runs, there will be negative phase-sequence, zero-sequence component, added losses will be produced, make commutator ripple
Coefficient increases, and causes transformator saturated, and compensated equipment just can make unbalanced load become balanced load；It addition, by estimating
Calculate prospective short circuit current, and quick-break current value, be up to prospective short circuit current shortly and achieve auto-cutout protection；Meanwhile, also
It is provided with Voltage unbalance protection, is determined the target setting of imbalance of three-phase voltage rate by the unbalance factor of three-phase piezoelectricity；This
Invention is capable of power distribution protection, it is ensured that the balance movement of power equipment；Real-time by ultrasonic sensor and pulse generator
The local discharge signal of detection power equipment, and by a series of process, make Partial Discharge show over the display
Show, can effectively learn the shelf depreciation situation of power equipment, thus the personnel that maintain easily carry out the maintenance of power equipment, keep away
There is the fault being difficult to retrieve in non-electrical equipment, and even causes security incident.
Accompanying drawing explanation
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
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the block diagram of the present invention；
Fig. 2 is the block diagram of power distribution protective device；
Fig. 3 is the block diagram of reactive power compensator；
Fig. 4 is the schematic diagram of power circuit；
Fig. 5 is the schematic diagram cutting control circuit；
Fig. 6 is the schematic diagram of phase detection device.
Fig. 7 is the schematic diagram of partial discharge monitoring device.
Detailed description of the invention
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
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
As shown in figs. 1-7, this multifunction power equipment monitoring system, including power equipment, power equipment connects local
Discharge monitoring device, power distribution protective device and reactive power compensator, partial discharge monitoring device, power distribution protective device and nothing
Reactive power compensation installations connects have central controller, central controller to realize electric quantity monitoring, power distribution protection and idle that electric power is arranged
Compensate.
Power distribution protective device, including distribution controller, distribution controller connects short-circuit protector, distribution controller according to
The prospective short circuit current of the parameter determination power supply unit of power equipment, short-circuit protector monitors the operation short circuit of power equipment in real time
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 shows, and short-circuit protector cuts off the power supply of power equipment.
Short-circuit protector includes automatic circuit and sectionaliser, and distribution controller utilizes sectionaliser to realize closing of short circuit current,
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 is the time interval of each deciliter of automatic circuit operation, and a deciliter operation for sectionaliser is decided by line voltage distribution, opens
The power supply i.e. separating brake closed, 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 employing is directly placed in route head end maximum transformator and calculates maximum short
Road electric current, the supply line of power supply unit connects protection system to earth, and protection system to earth connects when generation power supply unit touches shell
During earth fault, earth current forms loop by the earth resistance of the earth resistance of power supply unit and protection system to earth, and
Produce pressure drop on two resistance, reduce institute on power supply unit shell with voltage.
Utilizing current quick, it is stipulated that under maximum operational mode during three-phase shortcircuit, protection domain is maximum, for lmax,
Under minimum operational mode during line to line fault, protection domain is minimum, and for l mi n, wherein, under minimum operational mode, quick-break is protected
The relative value protecting scope meets:
In formula: K1rel--safety factor；Line end three-phase shortcircuit stable state electricity under I2k3.max--maximum operational mode
Stream；I opk--protection device one-off electric current；Es--system reference voltage；Under XS.Max--system maximum operational mode
Minimum equivalent impedance, current quick scope includes lower bar circuit or the end of power equipment, the action electricity of protection seting
Stream 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 imbalance
After delay time, controller controls to start Voltage unbalance protection, determines three-phase piezoelectricity unbalance factor, uses and arranges capacitor dress
Put realization, some group capacitor devices are carried out star-star connection mode connection, the voltage power taking container dress of unstable voltage protection
Put the open delta voltage of group.
Reactive power compensator, including current transformer and voltage transformer, it is characterised in that current transformer and voltage are mutual
Sensor connects phase detection device, and phase detection device connects compensating controller, compensating controller calculating current transformer
With the phase difference value of voltage transformer, determining the power factor of this phase, compensating controller connects power factor display unit
With switching control circuit, switching control circuit connects has switching capacitance group, voltage transformer summation current transformer to include A phase respectively
Transformer, B phase transformer and C phase transformer, switching capacitance group includes A phase electric capacity, B phase electric capacity and C phase electric capacity.
Phase detection device includes the voltage comparator being connected with voltage transformer and the I/V being connected with current transformer
Transducer, I/V transducer connects voltage transformer, and voltage transformer connects phase discriminator, phase discriminator enumerator, switching control
Circuit processed includes a zero-voltage detector, and zero-voltage detector one end, by being connected input order with door, is connected with door and has multi resonant
Agitator, zero-voltage detector connects photoelectrical coupler, and the other end of photoelectrical coupler is connected by resistance IGCT, brilliant
Brake tube connects has impulsive quarantine amplifier, power factor display unit to include LED display unit.
Compensating controller connect have power circuit, power circuit to include three terminal regulator, the input of three terminal regulator and
Connecting between earth terminal and have the first electric capacity, connecting between the output and ground of three terminal regulator has the second electric capacity, and three ends are steady
The input of depressor connects power supply by rectification circuit and transformator, and compensating controller is preset with the first valve value rate factor, when
When compensating controller determines this phase power factor more than this first valve value rate factor according to the collection data of phase detection device,
Do not compensate；When compensating controller obtain the collection data according to phase detection device determine this phase power factor less than this
During one valve value rate factor, compensate.
Compensating controller determines this phase power factor according to the collection data of phase detection device, including simultaneously in system
Three-phase voltage, three-phase current are acquired obtaining real-time network signal, after the isolation processing of isolation module, then carry out N point
Constant duration obtains voltage and current sequence, obtains the complex discrete sequence about the time, then carries out Fourier's series, then enters
Row discrete Fourier changes, and corrects, according to its conjugation, the relation obtaining between voltage, current vector and harmonic wave, is not considering that direct current divides
During amount, derive this phase place harmonic voltage and the virtual value of harmonic current, so that it is determined that active power, obtain the power of this phase place because of
Number, compensating controller, according to real-time voltage, electric current, calculates reactive power, determines and needs the idle of compensation, thus according in advance
If Switching Strategy, the part switching capacitance controlled in switching capacitance group carries out reactive-load compensation.
Controller is put in the partial discharge monitoring device office of including, controller connection is put in office amplification sample circuit, amplifies sampling
Circuit connects an A/D change-over circuit, and A/D change-over circuit connects ultrasonic sensor and pulse generator, office put controller and
The connection of A/D change-over circuit has memorizer, office to put controller connection and has display.Pulse generator produces at equipment two ends to be detected
Instantaneous voltage changes, and the change of this instantaneous voltage produces pulse current in the loop, and the impedance after testing of this impulse circuit is produced arteries and veins
Rush voltage, shown by display after amplifier.Coupled being capacitively coupled to of transient voltage change detects impedance, loop
Middle generation pulse current, pulse current impedance after testing produces pulse voltage.Set between ultrasonic sensor and A/D change-over circuit
Being equipped with front-end processing circuit, the signal that ultrasonic sensor is received by front-end processing circuit carries out Phototube Coupling, the most amplified
Sample circuit is amplified sampling processing, and when sampled result is beyond pre-set threshold value, prompting exists partial discharge phenomenon.Ultrasound wave
Sensor includes housing and the damping block being arranged in housing, is provided with piezoelectric chip, bottom piezoelectric chip bottom damping block
Being provided with protecting film, damping block is provided above binding post, and binding post connects has conductive lever, conductive lever part to run through shell
Body.Office puts controller and transmits the partial enlargement parameter of equipment to be detected to server, and server statistics equipment to be detected is
Little discharge cycle and maximum pd quantity, controller connection is put in office alarm unit, and each minimum discharge cycle, controller control is put in office
Alarm unit processed carries out instruction of reporting to the police.Set up the homologous pair sexual relationship of ultrasonic signal and discharge capacity, according to corresponding relation with super
Acoustic signals amplitude determines discharge capacity maximum.Determine discharge capacity maximum first, first according to the feedback of ultrasonic sensor, office
Put controller and determined discharge waveform by the amplitude of ultrasonic signal, frequency and discharge cycle.Display virtual oscillography display electric discharge
Waveform.Amplifying sample circuit and receive signal input by signalling channel, local discharge signal is enlarged into level signal, amplification is adopted
Sample circuit receives reference signal by signal by reference signal, exports after frequency spectrum migrates.
The present invention passes through reactive power compensator, improves power factor: avoid electromotor to reduce power factor as far as possible and run, anti-
The most distally load conveying is idle causes voltage and power attenuation, should carry out low power factor and limit, just i.e. take at user
Ground Measures of Reactive Compensation；Improve voltage-regulation: load the change to reactive requirement, the change of supply terminals voltage can be caused, to this
If kind of a change is adjusted from power end (power plant), some problems can be caused, and the equipment that compensates just plays maintenance supply voltage
Important function in prescribed limit；The balance of regulating load: occur in properly functioning when asymmetrical three-phase runs, can go out
Existing negative phase-sequence, zero-sequence component, will produce added losses, and make commutator ripple coefficient increase, cause transformator saturated, compensated set
For just unbalanced load being made to become balanced load；It addition, by estimation prospective short circuit current, and quick-break current value, will
Reach prospective short circuit current and achieve auto-cutout protection；Meanwhile, it is additionally provided with Voltage unbalance protection, by three-phase piezoelectricity
Unbalance factor determines the target setting of imbalance of three-phase voltage rate；The present invention is capable of power distribution protection, it is ensured that power equipment
Balance movement；Detected the local discharge signal of power equipment by ultrasonic sensor and pulse generator in real time, and pass through
A series of process, make Partial Discharge show over the display, can effectively learn the shelf depreciation of power equipment
Situation, thus the personnel that maintain easily carry out the maintenance of power equipment, it is to avoid there is the fault being difficult to retrieve in power equipment, even
Cause 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 etc. made, should be included within the scope of the present invention.
Claims (10)
1. a multifunction power equipment monitoring system, including power equipment, it is characterised in that described power equipment connects office
Portion's discharge monitoring device, power distribution protective device and reactive power compensator, described partial discharge monitoring device, power distribution protective device
And reactive power compensator connection has central controller, described central controller to realize the electric quantity monitoring of electric power setting, distribution is protected
Protect and reactive-load compensation.
Multifunction power equipment monitoring system the most according to claim 1, it is characterised in that described power distribution protective device,
Including distribution controller, described distribution controller connects short-circuit protector, and described distribution controller is according to the ginseng of power equipment
Number determines the prospective short circuit current of power supply unit, and described short-circuit protector monitors the operation short circuit current of power equipment in real time, 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, is entered by display
Row display, and the power supply of described short-circuit protector cut-out power equipment.
Multifunction power equipment monitoring system the most according to claim 2, it is characterised in that short-circuit protector includes overlapping
Device and sectionaliser, distribution controller utilizes sectionaliser to realize closing of short circuit current, and distribution controller utilizes automatic circuit excision short
Road electric current, automatic circuit pre-set coincidence number of times, when the actual coincidence number of times of switch reaches setting value and switchs board separating brake
During state, then locking automatic closing, isolated fault circuit, automatic circuit is provided with gap periods, and gap periods is that automatic circuit is each
Deciliter operation time interval, a deciliter operation for sectionaliser is decided by line voltage distribution, and the power supply of switch i.e. separating brake then closes after incoming call
Lock.
Multifunction power equipment monitoring system the most according to claim 3, it is characterised in that according to the maximum of power equipment
Short circuit current, determines quick-break one sub-value of power equipment, and wherein quick-break one sub-value is linear with maximum short circuit current, maximum
Short circuit current uses and directly maximum transformator is placed in route head end calculating maximum short circuit current, the supply lines of described power supply unit
Road connects protection system to earth, and described protection system to earth is when occurring power supply unit to touch shell earth fault, and earth current leads to
The earth resistance of the earth resistance and protection system to earth of crossing power supply unit forms loop, and produces pressure drop, fall on two resistance
On low power supply unit shell, institute is with voltage.
Multifunction power equipment monitoring system the most according to claim 4, it is characterised in that utilize current quick,
Regulation is under maximum operational mode during three-phase shortcircuit, and protection domain is maximum, for lmax, line to line fault under minimum operational mode
Time, protection domain is minimum, and 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 lower bar circuit or the end of 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 to start Voltage unbalance protection, determines three-phase piezoelectricity unbalance factor, uses and arranges capacitor device in fact
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.
Multifunction power equipment monitoring system the most according to claim 5, it is characterised in that described reactive power compensator,
Including current transformer and voltage transformer, it is characterised in that described current transformer and voltage transformer connect has phase place to examine
Surveying device, described phase detection device connects compensating controller, and described compensating controller calculating current transformer and voltage are mutual
The phase difference value of sensor, determines the power factor of this phase, and described compensating controller connects power factor display unit and throwing
Cutting control circuit, described switching control circuit connects has switching capacitance group, described voltage transformer summation current transformer to wrap respectively
Including A phase transformer, B phase transformer and C phase transformer, described switching capacitance group includes A phase electric capacity, B phase electric capacity and C phase electric capacity.
Multifunction power equipment monitoring system the most according to claim 6, it is characterised in that described phase detection device bag
Including the voltage comparator being connected with voltage transformer and the I/V transducer being connected with current transformer, described I/V transducer is even
Connecing voltage transformer, described voltage transformer connects phase discriminator, described phase discriminator enumerator, described switching control circuit
Including a zero-voltage detector, described zero-voltage detector one end by being connected input order with door, described be connected with door have many
Harmonic oscillator, described zero-voltage detector connects has photoelectrical coupler, the other end of described photoelectrical coupler to be connected by resistance
Having IGCT, described IGCT connects has impulsive quarantine amplifier, described power factor display unit to include LED display unit.
Multifunction power equipment monitoring system the most according to claim 7, it is characterised in that described compensating controller connects
There are power circuit, described power circuit to include three terminal regulator, connect between input and the earth terminal of described three terminal regulator
Having the first electric capacity, connecting between the output and ground of described three terminal regulator has the second electric capacity, described three terminal regulator
Input connects power supply by rectification circuit and transformator, and described compensating controller is preset with the first valve value rate factor, works as benefit
Repay controller according to the collection data of phase detection device determine this phase power factor more than this first valve value rate factor time, no
Compensate；When compensating controller obtain the collection data according to phase detection device determine this phase power factor less than this first
During valve value rate factor, compensate.
Multifunction power equipment monitoring system the most according to claim 8, it is characterised in that compensating controller is according to phase place
The collection data of detection device determine this phase power factor, including being acquired three-phase voltage, three-phase current in system simultaneously
Obtain real-time network signal, after the isolation processing of isolation module, then carry out N point constant duration and obtain voltage and electric current sequence
Row, obtain the complex discrete sequence about the time, then carry out Fourier's series, then carry out discrete Fourier change, according to it altogether
Yoke corrects the relation obtaining between voltage, current vector and harmonic wave, when not considering DC component, derive this phase place harmonic voltage and
The virtual value of harmonic current, so that it is determined that active power, obtains the power factor of this phase place, and described compensating controller is according in real time
Voltage, electric current, calculate reactive power, determine need to compensate idle, thus according to default Switching Strategy, control switching
Part switching capacitance in capacitance group carries out reactive-load compensation.
Multifunction power equipment monitoring system the most according to claim 9, it is characterised in that described partial discharge monitoring
Controller is put in the device office of including, controller connection is put in described office amplification sample circuit, and described amplification sample circuit connects A/D
Change-over circuit, described A/D change-over circuit connects ultrasonic sensor and pulse generator, and controller is put in described office and A/D turns
Change circuit connect have memorizer, described office put controller connect have display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677546.XA CN106329723A (en) | 2016-08-16 | 2016-08-16 | Multifunctional electric power equipment monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677546.XA CN106329723A (en) | 2016-08-16 | 2016-08-16 | Multifunctional electric power equipment monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106329723A true CN106329723A (en) | 2017-01-11 |
Family
ID=57740659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610677546.XA Pending CN106329723A (en) | 2016-08-16 | 2016-08-16 | Multifunctional electric power equipment monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106329723A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807585A (en) * | 2017-11-20 | 2018-03-16 | 宁德师范学院 | A kind of power equipment monitoring system |
| CN112433089A (en) * | 2020-10-15 | 2021-03-02 | 福建维力能源科技有限公司 | Adjustable mobile energy consumption monitoring device and monitoring method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201910588U (en) * | 2011-01-10 | 2011-07-27 | 杨淑云 | Low-voltage power distribution TNT 10-ohm grounding system |
| CN102694372A (en) * | 2012-06-01 | 2012-09-26 | 南京师范大学 | Monitoring and arc protecting system for switch cabinet |
| CN103135041A (en) * | 2013-01-05 | 2013-06-05 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Transformer/ electric reactor partial discharge on-line monitoring method and transformer/ electric reactor partial discharge on-line monitoring system |
| CN203589741U (en) * | 2013-12-10 | 2014-05-07 | 平高集团智能电气有限公司 | Inrush current-restraining noncontact low-voltage capacitor fling-cut switch |
| CN104009452A (en) * | 2014-05-29 | 2014-08-27 | 天津大学 | Protection scheme for direct current distribution system short-circuit fault |
| CN204967274U (en) * | 2015-09-22 | 2016-01-13 | 昆明耀龙置信变压器制造有限公司 | Low -voltage reactive compensation device |
-
2016
- 2016-08-16 CN CN201610677546.XA patent/CN106329723A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201910588U (en) * | 2011-01-10 | 2011-07-27 | 杨淑云 | Low-voltage power distribution TNT 10-ohm grounding system |
| CN102694372A (en) * | 2012-06-01 | 2012-09-26 | 南京师范大学 | Monitoring and arc protecting system for switch cabinet |
| CN103135041A (en) * | 2013-01-05 | 2013-06-05 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Transformer/ electric reactor partial discharge on-line monitoring method and transformer/ electric reactor partial discharge on-line monitoring system |
| CN203589741U (en) * | 2013-12-10 | 2014-05-07 | 平高集团智能电气有限公司 | Inrush current-restraining noncontact low-voltage capacitor fling-cut switch |
| CN104009452A (en) * | 2014-05-29 | 2014-08-27 | 天津大学 | Protection scheme for direct current distribution system short-circuit fault |
| CN204967274U (en) * | 2015-09-22 | 2016-01-13 | 昆明耀龙置信变压器制造有限公司 | Low -voltage reactive compensation device |
Non-Patent Citations (1)
| Title |
|---|
| 曹景亮: "分布式电源对配电网继电保护的影响研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807585A (en) * | 2017-11-20 | 2018-03-16 | 宁德师范学院 | A kind of power equipment monitoring system |
| CN112433089A (en) * | 2020-10-15 | 2021-03-02 | 福建维力能源科技有限公司 | Adjustable mobile energy consumption monitoring device and monitoring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106229998A (en) | A kind of electric power monitoring system | |
| CN204012678U (en) | A kind of power distribution network multimode ground protection system | |
| EP2874259B1 (en) | A residual current device | |
| CN110988445B (en) | Power grid operation data acquisition system | |
| Ikhide et al. | Fault detection in multi-terminal modular multilevel converter (MMC) based high voltage DC (HVDC) transmission system | |
| CN102055198B (en) | Reactive compensation intelligent monitoring management system | |
| CN107332211B (en) | A kind of capacitance-resistance type transformer DC magnetic bias inhibition device | |
| CN206595693U (en) | A kind of Intelligent plastic hull breaker | |
| CN105790233A (en) | Middle-segment impedance protection method suitable for half-wave transmission line | |
| CN105655976A (en) | Generator stator ground protection method | |
| CN206850446U (en) | A kind of intelligent load-balancing regulator | |
| WO2001082438A3 (en) | Method and system for providing voltage support to a load connected to a utility power network | |
| CN106329723A (en) | Multifunctional electric power equipment monitoring system | |
| CN103928936B (en) | For reducing converter and the conversion equipment that transformer is affected by zero-sequence current | |
| CN106684844B (en) | A kind of power distribution network isolated island recognition methods | |
| CN106229997A (en) | A kind of reactive power compensator | |
| CN210835064U (en) | Metering type intelligent circuit breaker based on Internet of things | |
| CN100370664C (en) | Arc and leakage protector | |
| CN100576676C (en) | Protection method of parellel reactor based on parameter recognition | |
| CN204304441U (en) | A kind of reactive power dynamic compensation system | |
| CN107783010A (en) | A kind of more level active compensation devices of front-end power and control method | |
| CN107785883A (en) | A kind of more level active compensation devices of three-phase four-arm and control method | |
| CN206132911U (en) | Overhead distributing net travelling wave positioning system based on signal injection device | |
| CN110376472A (en) | Method for detecting island of photovoltaic grid-connected inverter based on bicyclic current feedback control | |
| CN106159916A (en) | A kind of power distribution protective device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170111 |
|
| RJ01 | Rejection of invention patent application after publication |