CN108318778A - The cable and junction malfunction detection device of data is emulated with self refresh - Google Patents
The cable and junction malfunction detection device of data is emulated with self refresh Download PDFInfo
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- CN108318778A CN108318778A CN201711400642.0A CN201711400642A CN108318778A CN 108318778 A CN108318778 A CN 108318778A CN 201711400642 A CN201711400642 A CN 201711400642A CN 108318778 A CN108318778 A CN 108318778A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
Abstract
The present invention provides a kind of cable and junction malfunction detection devices emulating data with self refresh, including host computer, the host computer includes simulation model database, display screen and processor, and the voltage simulation waveform Vm=[Vm in time T of the reflection signal of N number of cable and junction malfunction are stored in the simulation model database1,Vm2,...,VmN], any of which voltage simulation waveform Vmi=[vmi1,vmi2,...,vmin], the value of i includes n voltage value from 1 to N, i.e., in each simulation waveform；The reflection signal of the display screen for display line wave pulse signal or the sampled signal Vs=[vs to the reflection signal1,vs2,...,vsn], and display and the matched one or more Vmi of Vs oscillograms；The processor is for executing computer program to realize related self refresh step.
Description
Technical field
The present invention relates to a kind of cable and junction malfunction detection device more particularly to a kind of electricity emulating data with self refresh
Cable joint fault test set.
Background technology
During operation of power networks, cable connector is weak link the most, and about 70% cable fault is happened at connector
Place, therefore accurate, quick determining joint quality and operating status, for ensureing that it is very important that power grid security reliability service has
Meaning.The main means of cable and junction malfunction detection at present have temperature method and local electric discharge.Temperature method is installed in joint
Temperature sensor, and the relevant parameters such as measuring temperature and temperature rise rate；Measurement result reaches system control by corresponding transmission network
Room processed is stored, and is compared with historical record；It is increased or for a long time more than the highest allowed if connector temperature is suddenly poly-
Temperature value is then judged as joint fault.When cable connector breaks down, joint insulation damages, surrounding air or foreign matter expose
In strong magnetic field circumstance, when being more than ionization field strength, partial discharge phenomenon will produce at cable connector.Therefore, shelf depreciation method is
According to the partial discharge phenomenon of cable connector, electromagnetic coupler is installed at cable connector, the magnetic field signal for measuring joint is strong
Degree is more than the upper field limit of normal operation, is judged as joint fault.Temperature method and local electric discharge are required in cable insulation
Exterior measuring installs sensor, and measurement is all weak signal, is interfered by around electromagnetic signal, acquires and makes an uproar containing high frequency in signal
Sound reduces the accuracy of measurement result.In addition, temperature method and local electric discharge can only be detected single connector, therefore
It can only be installed concentratedly in the place that the connectors such as electric substation are concentrated.
From 1948, Seidu was put forward for the first time the thought that traveling wave method measures transmission line malfunction, and traveling wave method is examined in cable fault
Application in survey is rapidly developed, existing it is proposed that Low Voltage Impulse Method, impulse-voltage method and pulse current method carry out electricity
Cable fault detect.Fu Shengqun exists《Traveling wave bounce technique Cable fault examination key technology research》In, construct connecing for cable connector
Get an electric shock resistance fault model and bleeder resistance fault model, and the failure that the traveling wave method that fault detects is applied to cable connector is examined
In survey.Specifically, emitting pulse signal, and detected reflectance signal (as shown in Figure 1) in cable head, reflection signal is uploaded to
Host computer is handled the reflection signal of acquisition by improving weighting factor method, determines fault type and the event of cable connector
Hinder situation.But this fault detection method still has following technical problem：The waveform for reflecting signal understands needs on the spot
Operating personnel has relevant professional standing and experience, i.e., when operation personal observations are to such as, but not limited to two shown in FIG. 1
When any one in waveform, only has relevant professional knowledge, can be accurately judged to whether cable breaks down, and
The type and position that failure occurs.Accordingly, it is desirable to provide a kind of technological means that automation is realized, is detected in cable and junction malfunction
In, can joint fault detection be carried out by computer system, and testing result is visually presented to operating personnel.
Invention content
In order to solve the above technical problems, according to the first aspect, the present invention provides a kind of cables based on traveling wave method to connect
Head fault test set, including traveling wave pulse signal transceiver and host computer, traveling wave pulse signal transceiver is for emitting traveling wave
Pulse signal, and obtain multiple traveling wave pulse signals reflection signal voltage value, host computer include simulation model database and
Processor is stored with the voltage emulation wave in time T of the reflection signal of N number of cable and junction malfunction in simulation model database
Shape Vm=[Vm1,Vm2,...,VmN], any of which voltage simulation waveform Vmi=[vmi1,vmi2,...,vmin], the value of i is from 1
Include n voltage value to N, i.e., in each simulation waveform；Processor is for executing computer program to realize following steps：
Step S100, driving traveling wave pulse signal transceiver obtain traveling wave maser in cable head transmitted traveling wave pulse signal
Rush the voltage waveform Vr=[vr that the reflection signal in time T of signal changes over time1,vr2,...,vrx], Vr includes x
A voltage value；If x ≠ n samples Vr, the voltage waveform Vs=[vs after sampling are formed1,vs2,...,vsn], such as
Fruit x=n, then using Vr as Vs；
Step S200 draws the oscillogram of Vs on the display screen of host computer；The abscissa of oscillogram is the time, indulges and sits
The voltage value being designated as in Vs；
Step S300 judges any Vm in Vmi=[vmi1,vmi2,...,vmin] and Vs diversity factor
Step S400, if D1×|vsk-vmik|max≤Si≤D2×avg(|vmik|), then adding in the oscillogram of Vs
Add the corresponding waveforms of Vmi；Wherein D1 (value is not less than 0.7) and D2 (value is not higher than 0.1) is predefined threshold value；Wherein k
Value range be 1 arrive n, | vsk-vmik|maxFor | vs1-vmi1|…|vsn-vmin| in maximum value, avg () be mean value letter
Number.
Through the invention, host computer can be calculated and be obtained automatically (also represents reflection with the sampled signal of reflection signal
Signal) similar simulation waveform, and the simulation waveform similar with the waveform of Vs is added in the oscillogram of Vs so that operation people
Member can be by comparison of wave shape, and the art-recognized meanings representated by the rapid oscillogram for understanding Vs can determine that Vs waveforms are corresponding
Fault condition, including but not limited to fault type and abort situation.
According to the second aspect, the present invention also provides a kind of cable and junction malfunction detections emulating data with self refresh
Equipment, including host computer, host computer include simulation model database, display screen and processor, are deposited in simulation model database
Contain the voltage simulation waveform Vm=[Vm in time T of the reflection signal of N number of cable and junction malfunction1,Vm2,...,VmN],
Middle any voltage simulation waveform Vmi=[vmi1,vmi2,...,vmin], the value of i is wrapped from 1 to N in that is, each simulation waveform
Include n voltage value；Show reflection signal of the screen for display line wave pulse signal or the sampled signal to the reflection signal
Vs=[vs1,vs2,...,vsn], and display and the matched one or more Vmi of Vs oscillograms；Processor is for executing calculating
Machine program is to realize following steps：
Step S1000, receives the confirmation operation of user, and confirmation operation includes at least the Vm to be updated of user's selectioni=
[vmi1,vmi2,...,vmin] and current Vs=[vs1,vs2,...,vsn]；
Step S1100 forms Um using corresponding voltage value in the voltage value update Vmi in Vsi=[umi1,umi2,...,
umin], wherein umikTo use vskUpdate vmikThe voltage value obtained afterwards, newer process specifically include：
If | vmik-vsk|≤V1, then
If | vmik-vsk| ＞ V2, then umik=vmik；
If V1＜ | vmik-vsk|≤V2, then umik=vmik+Zk(vsk-vmik)；
Wherein the value range of k is 1 to n, and Zk is regulation coefficient；
Step S1200 updates Vmi using Umi in simulation model database, forms new Vmi.
Description of the drawings
Fig. 1 is the oscillogram of the two kinds of reflection signals provided in the prior art；
Fig. 2 is the flow chart of the execution step of computer program according to the present invention；
Fig. 3 is according to the present invention on the display screen while to show the schematic diagram of Vs and Vmi；
Fig. 4 is the schematic diagram according to the present invention that Vmi is updated according to Vs.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, the present invention will be made further in conjunction with attached drawing
Detailed description.This description is to describe specific implementation consistent with the principles of the present invention by way of example, and not limitation
The description of mode, these embodiments is detailed enough, so that those skilled in the art can put into practice the present invention, is not being taken off
Other embodiment can be used in the case of from scope and spirit of the present invention and can change and/or replace each element
Structure.Therefore, it should not understand the following detailed description from restrictive, sense.
The present invention provides a kind of cable and junction malfunction detection device based on traveling wave method, including traveling wave pulse signal transmitting and receiving
Device and host computer.Traveling wave pulse signal transceiver be used for transmitted traveling wave pulse signal, and obtain a period of time (such as in time T,
As shown in Figure 1, an exemplary and non-limiting value of T is 2400ns) the reflection signals of multiple traveling wave pulse signals
Voltage value.In one embodiment of the invention, the realization of traveling wave pulse signal transceiver with《Traveling wave bounce technique cable fault is examined
Survey key technology research》In it is involved consistent.
Host computer is carried to the mobile computing device of operation field for ease of operating personnel, for example, notebook computer or
Person's tablet computer, in some embodiments, host computer can also be embodied as the mobile terminals such as mobile phone.Host computer and transceiver are logical
Letter connection, the voltage value of the reflection signal for receiving transceiver acquisition, and voltage value is handled.
According to the present invention, simulation model database and processor are included at least in host computer, is deposited in simulation model database
Contain the voltage simulation waveform Vm=[Vm in time T of the reflection signal of N number of cable and junction malfunction1,Vm2,...,VmN],
Middle any voltage simulation waveform Vmi=[vmi1,vmi2,...,vmin], the value of i is wrapped from 1 to N in that is, each simulation waveform
Include n voltage value.In one embodiment, any Vmi in voltage simulation waveform Vm be laboratory environment in measure it is real
The waveform that border joint fault is obtained, rather than《Traveling wave bounce technique Cable fault examination key technology research》That is introduced in text is direct
Ideal data is imported into the ideal simulation waveform that Matlab softwares obtain.In a preferred embodiment, voltage simulation waveform Vm
In any Vmi emulation smoothing processing (such as mean value smoothing processing) is carried out to multiple measurement voltage waveforms by Matlab after
It calculates and obtains.Each voltage simulation waveform Vmi illustrates the emulation wave in time T in the case of a kind of cable and junction malfunction
Shape.Preferably, the description information of corresponding any voltage simulation waveform Vmi, description letter are also stored in simulation model database
Breath is generally implemented as text message, and (open circuit is short for the fault type corresponding to the particular content such as Vmi waveforms including emulation
Road) and failure position (i.e. apart from the distance of head end) and other any information useful for fault detect occur.
As shown in Fig. 2, processor is for executing computer program to realize following steps：
Step S100, driving traveling wave pulse signal transceiver obtain traveling wave maser in cable head transmitted traveling wave pulse signal
Rush the voltage waveform Vr=[vr that the reflection signal in time T of signal changes over time1,vr2,...,vrx], Vr includes x
A voltage value.Further, wavelet de-noising also is carried out to Vr in the present invention, and according to the Vr after wavelet de-noising, one kind of noise reduction
Specific embodiment with《Traveling wave bounce technique Cable fault examination key technology research》In it is involved consistent.It is right if x ≠ n
Vr is sampled, and the voltage waveform Vs=[vs after sampling are formed1,vs2,...,vsn], if x=n, using Vr as Vs.
Specific sampling process is as follows：
If j1=j2, that is, sample the vs of acquisitionjBeing related to a vr before sampling, (such case is in x<When n more
It is common), then vsj=vrj1=vrj2；
If j1=j2- 1, that is, sample the vs of acquisitionjIt is related to the preceding two adjacent vr of sampling, then vsj=A1×vrj1+
A2×vrj2；vrj1And vrj2The comparison that such case occurs is more, it is therefore desirable to determine vrj1And vrj2To vsjAffecting parameters A1
And A2
If j1 ＜j2- 1, that is, sample the vs of acquisitionjIt is related to preceding three or more the adjacent vr of sampling, then vsj=avg
(vrj1..., vrj2)；Such case occurs considerably less, therefore is directly handled using mean value, although sacrificing few
The accuracy of amount, but improve whole computational efficiency.
Whereinavg()
For mean function,For downward rounding operator,Value range for the operator that rounds up, j is 1 to n.
Pass through sampling so that the voltage value in Vs is identical with the quantity of the voltage value in Vmi, is convenient for subsequent processing.
Step S200 draws the oscillogram of Vs on the display screen of host computer；The abscissa of oscillogram is the time, indulges and sits
The voltage value being designated as in Vs.Preferably, the value range of the abscissa of oscillogram is [0, T], the value of the ordinate of oscillogram
Ranging from [D1, D2], H1=1.2 × max (Vs), H2=min (0,1.2 × min (Vs)), wherein max (Vs) and min (Vs)
Respectively Vs includes maximum value and minimum value in n voltage.Setting in this way so that the presentation effect of oscillogram compared with
, not only will not in a coordinate system " excessively flat " for ideal, but also the range without departing from coordinate system.
Step S300 calculates any Vm in Vmi=[vmi1,vmi2,...,vmin] and Vs diversity factor
Step S400, if D1×|vsk-vmik|max≤Si≤D2×avg(|vmik|), then adding in the oscillogram of Vs
Add the corresponding waveforms of Vmi (oscillogram after illustrative addition is as shown in Figure 3)；Wherein D1 (preferred value is not less than 0.5)
It is predefined threshold value with D2 (preferred value is not higher than 0.1)；Wherein the value range of k is 1 to n, | vsk-vmik|maxFor |
vs1-vmi1|…|vsn-vmin| in maximum value, avg () be mean function.In step S400, one side diversity factor Si does not surpass
The product of D2 and Vmi mean values are crossed, this ensure that the absolute figure of diversity factor will not be excessive, on the other hand, diversity factor Si is big
In D1 and | vsk-vmik|maxProduct, this ensure that the difference in Vs and Vmi between the corresponding voltage value of n groups cannot be excessive.
According to the present invention, the Vmi for meeting step S400 judging results is added on the waveform of Vs, if Vmi only has
One, then directly displaying the description information of Vmi on the display screen of host computer；If Vmi is more than one, work as user
When (such as on-site personnel) clicks the Vmi corresponding waveforms of oscillogram, retouching for Vmi is shown on the display screen of host computer
State information.
Through the invention, host computer can be calculated and be obtained automatically (also represents reflection with the sampled signal of reflection signal
Signal) similar simulation waveform, and the simulation waveform the Vmi similar with waveform of Vs is added in the oscillogram of Vs so that work
Industry personnel can be by the comparison of wave shape of Vs and Vmi, the meaning representated by the rapid oscillogram for understanding Vs, additionally by upper
Description information is shown on the display screen of machine, it is also possible that operating personnel further appreciates that the correlation circumstance of failure.
According to the present invention corresponding display description letter is obtained in operating personnel according to Vmi oscillograms for example shown in Fig. 3
After breath, the foundation that operating personnel can be further shows the cable connector that description information inspection is likely to occur, and judges mutually powered-down
Whether cable joint breaks down.It can also be according to Vs waves when operating personnel confirms that cable connector breaks down according to the present invention
Shape figure is updated corresponding Vmi oscillograms, to obtain more accurate Vmi oscillograms.Specifically, as shown in figure 4, place
Reason device is additionally operable to execute computer program to realize following steps：
Step S1000, receives the confirmation operation of user, and the confirmation operation includes at least the to be updated of user selection
Vmi=[vmi1,vmi2,...,vmin] and current Vs=[vs1,vs2,...,vsn].Sentence as previously mentioned, meeting step S400
The Vmi of disconnected result is added on the waveform of Vs and shows on the display screen, if there are one Vmi, which is
Vmi to be updated；If Vmi is more than one, when user be used as by the selected Vmi of mouse or finger manipulation it is to be updated
Vmi.
Step S1100 forms Um using corresponding voltage value in the voltage value update Vmi in Vsi=[umi1,umi2,...,
umin], wherein umikTo use vskUpdate vmikThe voltage value obtained afterwards, the newer process specifically include：
If | vmik-vsk|≤V1, then
If | vmik-vsk| ＞ V2, then umik=vmik；
If V1＜ | vmik-vsk|≤V2, then umik=vmik+Zk(vsk-vmik)；
Wherein, V1 and V2 is preset voltage threshold, and V1<V2.In the present invention, according to vskAnd vmikDifference with V1, V2
Relationship, different more new strategies is respectively set.Specifically, (being less than or equal to V1) when the difference of the two is smaller, illustrate reality
The sample voltage value on border and emulation voltage value relatively, that is, emulate voltage value and sample voltage value all and have and is very high reliable
Property, so it is only necessary that being finely adjusted to emulation voltage value with linear interpolation, it will be able to obtain more than original emulation voltage value
Accurately new emulation voltage value.(it is more than V2) when the difference of the two is larger, since emulation voltage value itself has centainly
Reliability (although may not be especially accurate), therefore can illustrate that actual sample voltage value has larger probability to belong to and makes an uproar
Sound is adjusted emulation voltage value without using noise data, avoids the occurrence of the error of bigger in this case.When the two
When difference is between V1 and V2, illustrates sample voltage value while there is certain reliability and noise-induced, sampling electricity can be utilized
Pressure value to emulation voltage value be adjusted, but adjust amplitude cannot be excessive, i.e., no more than linear interpolation adjustment amplitude, because
This uses and is adjusted provided with coefficient Z.
According to the present invention, the value of Zk should be less than 1/2, that is, be less than | vmik-vsk|≤V1Adjustment amplitude.
Preferably,I.e. the value of Z is with sample voltage value and the pressure difference etc. for emulating voltage value
Increase and reduce, but does not still exceed 1/2.
Step S1200 updates Vmi using Umi in simulation model database, new Vmi is formed, for subsequently carrying out cable
Joint fault uses when detecting.
It is further comprising the steps of according to the present invention：
Step S1300 backs up the original Vmi being updated in simulation model database, so that the user of host computer
When finding Umi inaccuracy, it can be restored to original Vmi at any time.
Further, the present invention has also supplied remote server, remote server to be communicated to connect with multiple host computers, long-range to take
It is stored with voltage simulation waveform Vm=[Vm in business device1,Vm2,...,VmN], simulation model database in multiple host computers is from remote
It is downloaded in journey server and stores voltage simulation waveform Vm=[Vm1,Vm2,...,VmN].Researcher is by testing the electricity obtained
Pressure simulation waveform Vm be stored in remote server, and teams and groups be detected the host computer used can be from remote server
Synchronization gain Vm, to adapt to the detection of the cable and junction malfunction within the scope of teams and groups' inspection.In this application scenarios, since teams and groups are responsible for
The cable (and its connector) of detection is tended to belong to a batch of buying model, the similitude with electrical properties, therefore upper
Teams and groups operating personnel can be more accurately helped to determine cable fault using Umi updates Vmi in the machine of position.
In addition, according to the specification of the disclosed present invention, other realizations of the invention are for those skilled in the art
Significantly.The various aspects of embodiment and/or embodiment can be individually or with any combinations for system of the invention
In method.Specification and example therein should be only be regarded solely as it is exemplary, the actual scope of the present invention and spirit by appended
Claims indicate.
Claims (8)
1. a kind of cable and junction malfunction detection device with self refresh emulation data, including host computer, which is characterized in that described
Host computer includes simulation model database, display screen and processor, and being stored with N number of cable in the simulation model database connects
The voltage simulation waveform Vm=[Vm in time T of the reflection signal of head failure1,Vm2,...,VmN], any of which voltage is imitative
True waveform Vmi=[vmi1,vmi2,...,vmin], the value of i includes n voltage value from 1 to N, i.e., in each simulation waveform；
The reflection signal of the display screen for display line wave pulse signal or the sampled signal Vs=[vs to the reflection signal1,
vs2,...,vsn], and display and the matched one or more Vmi of Vs oscillograms；The processor is for executing computer journey
Sequence is to realize following steps：
Step S1000, receives the confirmation operation of user, and the confirmation operation includes at least the Vm to be updated of user selectioni
=[vmi1,vmi2,...,vmin] and current Vs=[vs1,vs2,...,vsn]；
Step S1100 forms Um using corresponding voltage value in the voltage value update Vmi in Vsi=[umi1,umi2,...,umin],
Wherein, umikTo use vskUpdate vmikThe voltage value obtained afterwards, the newer process specifically include：
If | vmik-vsk|≤V1, then
If | vmik-vsk| ＞ V2, then umik=vmik；
If V1＜ | vmik-vsk|≤V2, then umik=vmik+Zk(vsk-vmik)；
Wherein the value range of k is 1 to n, and Zk is regulation coefficient；
Step S1200 updates Vmi using Umi in simulation model database, forms new Vmi.
2. cable and junction malfunction detection device according to claim 1, which is characterized in that Zk<1/2.
3. cable and junction malfunction detection device according to claim 2, which is characterized in thatIts
Middle min () is smaller value function.
4. cable and junction malfunction detection device according to claim 1, which is characterized in that if display screen display
There are one Vmi, then the Vmi is Vmi to be updated；If Vmi is more than one, user passes through mouse or finger exercise
Make selected Vmi as Vmi to be updated.
5. cable and junction malfunction detection device according to claim 1, which is characterized in that the processor is based on executing
Calculation machine program is also to realize following steps：
Step S1300 backs up the original Vmi being updated in simulation model database.
6. cable and junction malfunction detection device according to claim 1, which is characterized in that the host computer also and remotely takes
Business device communication connection.
7. cable and junction malfunction detection device according to claim 6, which is characterized in that stored in the remote server
There are voltage simulation waveform Vm=[Vm1,Vm2,...,VmN], the simulation model database in multiple host computers is from remote server
It downloads and stores voltage simulation waveform Vm=[Vm1,Vm2,...,VmN]。
8. cable and junction malfunction detection device according to claim 1, which is characterized in that the processor is based on executing
Calculation machine program shows one or more Vmi to realize on the display screen, be as follows：
Step S100, driving traveling wave pulse signal transceiver obtain traveling wave pulse letter in cable head transmitted traveling wave pulse signal
Number the voltage waveform Vr=[vr that change over time of the reflection signal in time T1,vr2,...,vrx], Vr includes x electricity
Pressure value；If x ≠ n samples Vr, the voltage waveform Vs=[vs after sampling are formed1,vs2,...,vsn], if x=
N, then using Vr as Vs；
Step S200 draws the oscillogram of Vs on the display screen of host computer；The abscissa of the oscillogram is the time, indulges and sits
The voltage value being designated as in Vs；
Step S300 calculates any Vm in Vmi=[vmi1,vmi2,...,vmin] and Vs diversity factorStep S400, if D1×|vsk-vmik|max≤Si≤D2×avg(|vmik|), then in the Vs
Oscillogram on the corresponding waveforms of addition Vmi；Wherein D1 (value is not less than 0.7) and D2 (value is not higher than 0.1) is predefined
Threshold value；Wherein the value range of k is 1 to n, | vsk-vmik|maxFor | vs1-vmi1|…|vsn-vmin| in maximum value, avg
() is mean function.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797961A (en) * | 2004-12-27 | 2006-07-05 | 日本电气株式会社 | Radio transmitter and transmission power adjustment method |
| KR100913507B1 (en) * | 2008-08-20 | 2009-08-21 | (주)인텍에프에이 | Electric power simulator for renewable energy inverter and operating method thereof |
| CN104360222A (en) * | 2014-12-09 | 2015-02-18 | 国网宁夏电力公司 | Rapid calculation method of high-voltage/extra-high voltage direct current (DC) transmission line fault voltage traveling wave |
| CN104820168A (en) * | 2015-05-05 | 2015-08-05 | 云南电网有限责任公司电力科学研究院 | Lightning stroke fault determination method based on waveform difference degree and lightning stroke fault sample database |
| US20170187188A1 (en) * | 2015-12-23 | 2017-06-29 | Schneider Electric Industries Sas | Control method of an electric microgrid |
-
2017
- 2017-12-22 CN CN201711400642.0A patent/CN108318778B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797961A (en) * | 2004-12-27 | 2006-07-05 | 日本电气株式会社 | Radio transmitter and transmission power adjustment method |
| KR100913507B1 (en) * | 2008-08-20 | 2009-08-21 | (주)인텍에프에이 | Electric power simulator for renewable energy inverter and operating method thereof |
| CN104360222A (en) * | 2014-12-09 | 2015-02-18 | 国网宁夏电力公司 | Rapid calculation method of high-voltage/extra-high voltage direct current (DC) transmission line fault voltage traveling wave |
| CN104820168A (en) * | 2015-05-05 | 2015-08-05 | 云南电网有限责任公司电力科学研究院 | Lightning stroke fault determination method based on waveform difference degree and lightning stroke fault sample database |
| US20170187188A1 (en) * | 2015-12-23 | 2017-06-29 | Schneider Electric Industries Sas | Control method of an electric microgrid |
Non-Patent Citations (1)
| Title |
|---|
| 蔡超 等: "一种提高智能变电站PMU相量测量精度的改进采样值调整算法", 《电力自动化设备》 * |
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