CN102495303B - Method and device for determining main responsible party of voltage flicker - Google Patents
Method and device for determining main responsible party of voltage flicker Download PDFInfo
- Publication number
- CN102495303B CN102495303B CN201110367781.4A CN201110367781A CN102495303B CN 102495303 B CN102495303 B CN 102495303B CN 201110367781 A CN201110367781 A CN 201110367781A CN 102495303 B CN102495303 B CN 102495303B
- Authority
- CN
- China
- Prior art keywords
- common connection
- points
- voltage
- line current
- pcc
- 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.)
- Active
Links
Landscapes
- Devices For Supply Of Signal Current (AREA)
Abstract
An embodiment of the invention provides a method and a device for determining a main responsible party of voltage flicker. The method includes: acquiring common connection point voltage signals Vpcc and line current signals Il in a power supply network according to a set sampling frequency; obtaining common connection point voltage fluctuation delta Vpcc according to the common connection point voltage signals Vpcc, wherein the delta Vpcc=Vpcc2-Vpcc1, and the Vpcc1 and the Vpcc2 are common connection point voltage signals continuously measured twice; obtaining line current fluctuation components delta Ils caused by system voltage fluctuation and line current fluctuation components delta Ilc caused by user load resistance fluctuation according to the common connection point voltage signals Vpcc and the line current signals Il; obtaining common connection point voltage fluctuation components delta Vpccc caused by user load impedance fluctuation according to the common connection point voltage fluctuation delta Vpcc, the common connection point voltage signals Vpcc, the line current signals Il and the line current fluctuation components delta Ils; and determining the main responsible party of voltage flicker by comparing the directions and the sizes of the common connection point voltage fluctuation delta Vpcc and the common connection point voltage fluctuation components delta Vpccc caused by the user load impedance fluctuation with those of the common connection point voltage signal Vpcc1 measured for the first time.
Description
Technical field
The present invention relates to power supply technique field, especially relate to a kind of method and apparatus determining voltage flicker primary responsibility party.
Background technology
In recent years, along with the develop rapidly of power industry, electric load is day by day diversified, and non-linear, impact load such as electric arc furnaces, widely using of rolling mill bring great challenge to the electric power system quality of power supply.When the voltage fluctuation of power supply network system side or user's side impact load put into operation, electrical network points of common connection there will be voltage fluctuation, within the scope of certain vibration frequency, just there will be voltage flicker phenomenon.This voltage flicker phenomenon not only makes houselights glimmer, and the quality of voltage problem that can electrical network be caused further wider.
When there is the voltage flicker of certain level in power supply network, the long-time flickering value P obtained according to existing IEC61000-4-15 canonical measure
ltand short time flicker value P
stthe order of severity of voltage flicker can only be embodied, the possible position of voltage flicker interference source can not be disclosed, be unprofitable to the division of flickering responsibility, thus cannot carry out voltage flicker control targetedly.For supply network, once there is the voltage flicker of certain level, just must take measures to reduce voltage flicker level, to reduce the impact of the user's productive life electricity consumption on access power supply network at once.Specifically, reduce the voltage flicker level in electrical network, common way has: a) reduce system impedance; B) to easily causing the impact load of flickering to adopt individual networks to power; C) active power compensator is installed.This several way all needs larger investment, and thus relevant decision-making must be based upon on power supply network real-time information as far as possible accurately, has the real-time specific aim of quite level.Consider the uncertainty that flickering interference source distributes, the voltage flicker monitored at supply network points of common connection may cause due to system side voltage fluctuation, also likely fluctuated by user side load impedance and cause, more generally in situation, these two kinds fluctuations are often worked simultaneously, and just the respective annoyance level to power supply network may be different.Existing is carry out off-line analysis to flickering event recorder data about flickering disturbing source knowledge method for distinguishing, and needs to take into account system short circuit capacity, and analytic process is comparatively complicated, cannot provide voltage flicker primary responsibility party information in real time.Therefore, invent a kind of can the method (such as determining mainly by electric power system side still caused by user side) of rapid and convenient determination voltage flicker primary responsibility party, to improve flickering interference source control, this is for reduction mains voltage flickering level, and it is very necessary for improving supply voltage quality.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus determining voltage flicker primary responsibility party, can determine the primary responsibility party of the voltage flicker in power supply network quickly and easily, improves the specific aim of flicker source control.
On the one hand, embodiments provide a kind of method determining voltage flicker primary responsibility party, the method comprises: gather points of common connection voltage signal V in power supply network according to the sample frequency of setting
pccand line current signal I
l; According to points of common connection voltage signal V
pccobtain points of common connection magnitude of a voltage fluctuation Δ V
pcc, wherein Δ V
pcc=V
pcc2-V
pcc1, wherein V
pcc1and V
pcc2be respectively the double points of common connection voltage signal recorded; According to described points of common connection voltage signal V
pccand line current signal I
lobtain the line current fluctuation component Δ I caused by system side voltage fluctuation
lswith the line current fluctuation component Δ I caused that fluctuated by user side load resistance
lc; According to points of common connection magnitude of a voltage fluctuation Δ V
pcc, points of common connection voltage signal V
pcc, line current signal I
land line current fluctuation component Δ I
lsobtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc; By comparing points of common connection magnitude of a voltage fluctuation Δ V
pccand user side load impedance fluctuates the points of common connection voltage fluctuation component Δ V caused
pcccrelative to the points of common connection voltage signal V that first time records
pcc1direction and size determine the primary responsibility party of voltage flicker.
Preferably, in the embodiment of the present invention by comparing points of common connection magnitude of a voltage fluctuation Δ V
pccand user side load impedance fluctuates the points of common connection voltage fluctuation component Δ V caused
pcccrelative to the points of common connection voltage signal V that first time records
pcc1direction and size determine that the primary responsibility party of voltage flicker comprises: judge
with
whether jack per line, if contrary sign, then the primary responsibility party of voltage flicker is power supply network system side; If jack per line, then make the following judgment further: judge
with threshold coefficient K
downand K
upmagnitude relationship, if
then the primary responsibility party of voltage flicker is power supply network system side; If
then the primary responsibility party of voltage flicker is power supply network user side; If
then power supply network system side is suitable for the responsibility of voltage flicker with user side.
Preferably, embodiment of the present invention method also comprises: statistics
with
the simulation experiment result during jack per line, according to described the simulation experiment result definite threshold COEFFICIENT K
downand K
upvalue.
Preferably, in the embodiment of the present invention according to described points of common connection voltage signal V
pccand line current signal I
lobtain the line current fluctuation component Δ I caused by system side voltage fluctuation
lscomprise: utilize formula
obtain line current fluctuation component Δ I
ls; Described according to points of common connection voltage signal V
pccand line current signal I
lobtain being fluctuated the line current fluctuation component Δ I caused by user side load resistance
lccomprise: utilize formula
obtain line current fluctuation component Δ I
lc; Wherein I
l1and I
l2be respectively and V
pcc1and V
pcc2with the line current signal that time point records.
Preferably, in the embodiment of the present invention according to points of common connection magnitude of a voltage fluctuation Δ V
pcc, points of common connection voltage signal V
pcc, line current signal I
land line current fluctuation component Δ I
lsobtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccccomprise: according to formula
and
obtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc, wherein Δ V
pccsfor the points of common connection voltage fluctuation component that system side voltage fluctuation causes.
On the other hand, the embodiment of the present invention additionally provides a kind of device determining voltage flicker primary responsibility party, and this device comprises: collecting unit, gathers points of common connection voltage signal V in power supply network for the sample frequency according to setting
pccand line current signal I
l; First computing unit, for according to points of common connection voltage signal V
pccobtain points of common connection magnitude of a voltage fluctuation Δ V
pcc, wherein Δ V
pcc=V
pcc2-V
pcc1, wherein V
pcc1and V
pcc2be respectively the double points of common connection voltage signal recorded; Second computing unit, for according to described points of common connection voltage signal V
pccand line current signal I
lobtain the line current fluctuation component Δ I caused by system side voltage fluctuation
lswith the line current fluctuation component Δ I caused that fluctuated by user side load resistance
lc; 3rd computing unit, for according to points of common connection magnitude of a voltage fluctuation Δ V
pcc, points of common connection voltage signal V
pcc, line current signal I
land line current fluctuation component Δ I
lsobtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc; Responsibility positioning unit, for by comparing points of common connection magnitude of a voltage fluctuation Δ V
pccand user side load impedance fluctuates the points of common connection voltage fluctuation component Δ V caused
pcccrelative to the points of common connection voltage signal V that first time records
pcc1direction and size determine the primary responsibility party of voltage flicker.
Preferably, the responsibility positioning unit in the embodiment of the present invention comprises: the first judge module, for judging
with
whether jack per line; Second judge module, for judging at the first judge module
with
when being jack per line, judge further
with threshold coefficient K
downand K
upmagnitude relationship; First output module, for judging at described first judge module
with
for contrary sign, and judge at described second judge module
time, the primary responsibility party of output information instructed voltage flickering is power supply network system side; Second output module, for judging at described second judge module
time, the primary responsibility party of output information instructed voltage flickering is power supply network user side; 3rd output module, for judging at described second judge module
time, output information instruction power supply network system side is suitable for the responsibility of voltage flicker with user side.
Preferably, the embodiment of the present invention also comprises: threshold value determination unit, for statistics
with
the simulation experiment result during jack per line, according to described the simulation experiment result definite threshold COEFFICIENT K
downand K
upvalue.
Preferably, in the embodiment of the present invention the second computing unit specifically for: utilize formula
obtain line current fluctuation component Δ I
ls, and utilize formula
obtain line current fluctuation component Δ I
lc, wherein I
l1and I
l2be respectively and V
pcc1and V
pcc2with the line current signal that time point records.
Preferably, in the embodiment of the present invention the 3rd computing unit specifically for: according to formula
and
obtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc, wherein Δ V
pccsfor the points of common connection voltage fluctuation component that system side voltage fluctuation causes.
The embodiment of the present invention voltage flicker can told quickly and easily in power supply network is mainly caused by the voltage fluctuation of network system side or the fluctuation of user side load impedance, and has quantized flicker treatment responsibility, improves the specific aim of flicker source control.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of schematic flow sheet determining the method for voltage flicker primary responsibility party that Fig. 1 provides for the embodiment of the present invention;
Electric power system schematic diagram after the simplification that Fig. 2 provides for the embodiment of the present invention;
A kind of structural representation determining the device of voltage flicker primary responsibility party that Fig. 3 provides for the embodiment of the present invention;
The structural representation of a kind of responsibility positioning unit that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Be illustrated in figure 1 a kind of schematic flow sheet determining the method for voltage flicker primary responsibility party that the embodiment of the present invention provides, the method comprises:
S101: gather points of common connection voltage signal V in power supply network according to the sample frequency of setting
pccand line current signal I
l.
In order to clearly present invention is described, first actual power system is simplified, be illustrated in figure 2 the electric power system schematic diagram after simplification, consider the supply network relative to low-voltage-grade, the capacity of the electric system of voltage levels can be considered as infinity, then according to Thevenin theorem, a power supply network system side equivalent voltage source U
sthe equivalent impedance Z connected with one
s=R
s+ jX
srepresent, the load impedance equivalent impedance Z of user side
l=R
l+ jX
lrepresent, and think system side equivalent impedance Z
simmobilize, user side equivalent impedance Z
lfor variableimpedance.
In the simplification electric power system shown in Fig. 2, if system side voltage source U
sconstant, user side load impedance Z
lfluctuate, then line current I
lmust fluctuate, corresponding line drop also can produce fluctuation, thus causes points of common connection magnitude of voltage V in power supply network
pccfluctuate.Same, as user side load impedance Z
lconstant, system side voltage source U
spoints of common connection magnitude of voltage V during fluctuation
pccalso can fluctuate.And in actual power system, system side voltage fluctuation and user side load impedance fluctuate simultaneous often.
In this step, can according to the sample frequency f of setting
sgather points of common connection voltage signal V in power supply network
pccand line current signal I
lnumerical value, obtain the double time point voltage measuring value V recorded
pcc1, V
pcc2and the line current measured value I of correspondence
l1, I
l2.
S:102: according to points of common connection voltage signal V
pccobtain points of common connection magnitude of a voltage fluctuation Δ V
pcc, wherein Δ V
pcc=V
pcc2-V
pcc1.
S103: according to described points of common connection voltage signal V
pccand line current signal I
lobtain the line current fluctuation component Δ I caused by system side voltage fluctuation
lswith the line current fluctuation component Δ I caused that fluctuated by user side load resistance
lc.
According to Fig. 2, if the user side load impedance of corresponding above-mentioned two time points is respectively Z
l1, Z
l2, then there is following relational expression:
V
pcc1＝I
l1·Z
l1(1)
V
pcc2＝I
l2·Z
l2(2)
If the line current variable quantity of double measurement is Δ I
l, user side load impedance variable quantity is Δ Z
l, points of common connection magnitude of a voltage fluctuation is Δ V
pcc, its definition is respectively:
ΔI
l＝I
l2-I
l1(3)
ΔZ
l＝Z
l2-Z
l1(4)
ΔV
pcc＝V
pcc2-V
pcc1(5)
Can be obtained by formula (1) ~ (5):
ΔV
pcc＝I
l1ΔZ
l+ΔI
lZ
l1+ΔI
lΔZ
l(6)
Definition: Δ I
l=Δ I
ls+ Δ I
lc(7)
Consider in actual power net, relative to user side load impedance Z
l, system side equivalent impedance Z
svalue usually very little, therefore as power supply network system side voltage source U
smagnitude of voltage V
sconstant, user side load impedance Z
lduring fluctuation, system side equivalent impedance Z
son change in pressure drop negligible, then have:
Can be obtained further by formula (7) and formula (8), when the voltage fluctuation of power supply network system side, have when user side load impedance is constant:
S104: according to points of common connection magnitude of a voltage fluctuation Δ V
pcc, points of common connection voltage signal V
pcc, line current signal I
land line current fluctuation component Δ I
lsobtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc.
Can be obtained by formula (6): above-mentioned two current fluctuation component Δ I
lcwith Δ I
lshow caused points of common connection voltage relative variation is respectively:
User side load impedance can be obtained according to above-mentioned formula (10) and (11) to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc.
S105: by comparing points of common connection magnitude of a voltage fluctuation Δ V
pccand user side load impedance fluctuates the points of common connection voltage fluctuation component Δ V caused
pcccrelative to the points of common connection voltage signal V that first time records
pcc1direction and size determine the primary responsibility party of voltage flicker.
As one embodiment of the present of invention, this step specifically can comprise:
Judge
with
whether jack per line, if contrary sign, then the primary responsibility party of voltage flicker is power supply network system side; If jack per line, then make the following judgment further:
Judge
with threshold coefficient K
downand K
upmagnitude relationship, if
then the primary responsibility party of voltage flicker is power supply network system side; If
then the primary responsibility party of voltage flicker is power supply network user side; If
then power supply network system side is suitable for the responsibility of voltage flicker with user side.
Above-mentioned threshold coefficient K
downand K
upcan be determined by abundant experimental results statistical study, in the present embodiment, emulation experiment can be carried out to the experimental circuit shown in Fig. 2, assuming that system side voltage V
s=242kV, fluctuation range is ± 3%; System side equiva lent impedance Z
s=13.9410+j48.2963, its amplitude fluctuations scope is ± 50%, angle of impedance random fluctuation within the scope of-5 ° ~ 5 °.In order to determine K
downand K
upvalue, will
with
experimental result statistics during jack per line is as shown in table 1:
Table 1
Experiment statistics result is as shown in Table 1 known, when adopting the inventive method determination voltage flicker party responsible, if
the inventive method can judge to cause the main cause of voltage flicker to be exactly system side voltage fluctuation accurately; Meanwhile, if
the inventive method also can judge to cause the main cause of voltage flicker to be exactly the load impedance fluctuation of user side accurately.Therefore, K
downvalue should be 0.3, K
upshould be 0.7.
The embodiment of the present invention voltage flicker can told quickly and easily in power supply network is mainly caused by the voltage fluctuation of network system side or the fluctuation of user side load impedance, and has quantized flicker treatment responsibility, improves the specific aim of flicker source control.
Be illustrated in figure 3 a kind of structural representation determining the device of voltage flicker primary responsibility party that the embodiment of the present invention provides, this device comprises: collecting unit 301, first computing unit 302, second computing unit 303, the 3rd computing unit 304 and responsibility positioning unit 305.
Collecting unit 301 gathers points of common connection voltage signal V in power supply network for the sample frequency according to setting
pccand line current signal I
l.
See also Fig. 2, collecting unit 301 can according to the sample frequency f of setting
sgather points of common connection voltage signal V in power supply network
pccand line current signal I
lnumerical value, obtain the double time point voltage measuring value V recorded
pcc1, V
pcc2and the line current measured value I of correspondence
l1, I
l2.
First computing unit 302 is for according to points of common connection voltage signal V
pccobtain points of common connection magnitude of a voltage fluctuation Δ V
pcc, wherein Δ V
pcc=V
pcc2-V
pcc1, wherein V
pcc1and V
pcc2be respectively the double points of common connection voltage signal recorded.
Second computing unit 303 is for according to described points of common connection voltage signal V
pccand line current signal I
lobtain the line current fluctuation component Δ I caused by system side voltage fluctuation
lswith the line current fluctuation component Δ I caused that fluctuated by user side load resistance
lc.
In the present embodiment, the second computing unit 303 specifically can obtain line current fluctuation component Δ I according to above-mentioned formula (8) and (9)
lsand Δ I
lc.
3rd computing unit 304 is for according to points of common connection magnitude of a voltage fluctuation Δ V
pcc, points of common connection voltage signal V
pcc, line current signal I
land line current fluctuation component Δ I
lsobtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc.
In the present embodiment, the 3rd computing unit 304 specifically can obtain user side load impedance according to above-mentioned formula (10) and (11) and to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc.
Responsibility positioning unit 305 is for by comparing points of common connection magnitude of a voltage fluctuation Δ V
pccand user side load impedance fluctuates the points of common connection voltage fluctuation component Δ V caused
pcccrelative to the points of common connection voltage signal V that first time records
pcc1direction and size determine the primary responsibility party of voltage flicker.
As one embodiment of the present of invention, be illustrated in figure 4 the structural representation of a kind of responsibility positioning unit that the embodiment of the present invention provides, this responsibility positioning unit comprises: the first judge module 401, second judge module 402, first output module 403, second output module 404 and the 3rd output module 405, wherein:
First judge module 401 is for judging
with
whether jack per line.
Second judge module 402 is for judging at the first judge module
with
when being jack per line, judge further
with threshold coefficient K
downand K
upmagnitude relationship.
First output module 403 is for judging at described first judge module
with
for contrary sign, and judge at described second judge module
time, the primary responsibility party of output information instructed voltage flickering is power supply network system side.
Second output module 404 is for judging at described second judge module
time, the primary responsibility party of output information instructed voltage flickering is power supply network user side.
3rd output module 405 is for judging at described second judge module
time, output information instruction power supply network system side is suitable for the responsibility of voltage flicker with user side.
As one embodiment of the present of invention, this device can also comprise a threshold value determination unit (not illustrating), and it is for statistics
with
the simulation experiment result during jack per line, according to described the simulation experiment result definite threshold COEFFICIENT K
downand K
upvalue.The defining method of concrete threshold coefficient see table 1 and associated description thereof, can not repeat them here.
The embodiment of the present invention voltage flicker can told quickly and easily in power supply network is mainly caused by the voltage fluctuation of network system side or the fluctuation of user side load impedance, and has quantized flicker treatment responsibility, improves the specific aim of flicker source control.
In one or more exemplary design, the above-mentioned functions described by the embodiment of the present invention can realize in the combination in any of hardware, software, firmware or this three.If realized in software, these functions can store on the medium with computer-readable, or are transmitted on the medium of computer-readable with one or more instruction or code form.Computer readable medium comprises computer storage medium and is convenient to make to allow computer program transfer to the telecommunication media in other place from a place.Storage medium can be that any general or special computer can the useable medium of access.Such as, such computer readable media can include but not limited to RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage device, or other anyly may be used for carrying or store the medium that can be read the program code of form with instruction or data structure and other by general or special computer or general or special processor.In addition, any connection can be properly termed computer readable medium, such as, if software is by a concentric cable, optical fiber computer, twisted-pair feeder, Digital Subscriber Line (DSL) or being also comprised in defined computer readable medium with wireless way for transmittings such as such as infrared, wireless and microwaves from a web-site, server or other remote resource.Described video disc (disk) and disk (disc) comprise Zip disk, radium-shine dish, CD, DVD, floppy disk and Blu-ray Disc, and disk is usually with magnetic duplication data, and video disc carries out optical reproduction data with laser usually.Above-mentioned combination also can be included in computer readable medium.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; the protection domain be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. determine a voltage flicker primary responsibility party's method, it is characterized in that, described method comprises:
Points of common connection voltage signal V in power supply network is gathered according to the sample frequency of setting
pccand line current signal I
l , use V
pcc1and V
pcc2represent the double points of common connection voltage signal recorded respectively, use I
l1
and I
l2
represent respectively and V
pcc1and V
pcc2with the line current signal that time point records;
According to points of common connection voltage signal V
pcc1and V
pcc2obtain points of common connection magnitude of a voltage fluctuation Δ V
pcc, wherein Δ V
pcc=V
pcc2-V
pcc1;
According to the described double points of common connection voltage signal that records and line current signal I
l2
obtain the line current fluctuation component Δ I caused by system side voltage fluctuation
ls
;
According to points of common connection magnitude of a voltage fluctuation Δ V
pcc, points of common connection voltage signal V
pcc1, line current signal I
l1
and line current fluctuation component Δ I
ls
obtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc;
By comparing points of common connection magnitude of a voltage fluctuation Δ V
pccand user side load impedance fluctuates the points of common connection voltage fluctuation component Δ V caused
pcccrelative to the points of common connection voltage signal V that first time records
pcc1direction and size determine the primary responsibility party of voltage flicker;
Described by comparing points of common connection magnitude of a voltage fluctuation Δ V
pccand user side load impedance fluctuates the points of common connection voltage fluctuation component Δ V caused
pcccrelative to the points of common connection voltage signal V that first time records
pcc1direction and size determine that the primary responsibility party of voltage flicker comprises:
Judge
with
whether jack per line, if contrary sign, then the primary responsibility party of voltage flicker is power supply network system side; If jack per line, then make the following judgment further:
Judge
with threshold coefficient K
downand K
upmagnitude relationship, if
then the primary responsibility party of voltage flicker is power supply network system side; If
then the primary responsibility party of voltage flicker is power supply network user side; If
then power supply network system side is suitable for the responsibility of voltage flicker with user side.
2. determine the method for voltage flicker primary responsibility party as claimed in claim 1, it is characterized in that, described method also comprises: statistics
with
the simulation experiment result during jack per line, according to described the simulation experiment result definite threshold COEFFICIENT K
downand K
upvalue.
3. determine the method for voltage flicker primary responsibility party as claimed in claim 1, it is characterized in that, described according to points of common connection magnitude of a voltage fluctuation Δ V
pcc, points of common connection voltage signal V
pcc1, line current signal I
l1
and line current fluctuation component Δ I
ls
obtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccccomprise:
According to formula
and
obtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc, wherein Δ V
pccsfor the points of common connection voltage fluctuation component that system side voltage fluctuation causes.
4. determine a voltage flicker primary responsibility party's device, it is characterized in that, described device comprises:
Collecting unit, gathers points of common connection voltage signal V in power supply network for the sample frequency according to setting
pccand line current signal I
l , use V
pcc1and V
pcc2represent the double points of common connection voltage signal recorded respectively, use I
l1
and I
l2
represent respectively and V
pcc1and V
pcc2with the line current signal that time point records;
First computing unit, for according to points of common connection voltage signal V
pcc1and V
pcc2obtain points of common connection magnitude of a voltage fluctuation Δ V
pcc, wherein Δ V
pcc=V
pcc2-V
pcc1;
Second computing unit, for according to the double points of common connection voltage signal that records and line current signal I
l2
obtain the line current fluctuation component Δ I caused by system side voltage fluctuation
ls
;
3rd computing unit, for according to points of common connection magnitude of a voltage fluctuation Δ V
pcc, points of common connection voltage signal V
pcc1, line current signal I
l1
and line current fluctuation component Δ I
ls
obtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc;
Responsibility positioning unit, for by comparing points of common connection magnitude of a voltage fluctuation Δ V
pccand user side load impedance fluctuates the points of common connection voltage fluctuation component Δ V caused
pcccrelative to the points of common connection voltage signal V that first time records
pcc1direction and size determine the primary responsibility party of voltage flicker;
Described responsibility positioning unit comprises:
First judge module, for judging
with
whether jack per line;
Second judge module, for judging at the first judge module
with
when being jack per line, judge further
with threshold coefficient K
downand K
upmagnitude relationship;
First output module, for judging at described first judge module
with
for contrary sign, and judge at described second judge module
time, the primary responsibility party of output information instructed voltage flickering is power supply network system side;
Second output module, for judging at described second judge module
time, the primary responsibility party of output information instructed voltage flickering is power supply network user side;
3rd output module, for judging at described second judge module
time, output information instruction power supply network system side is suitable for the responsibility of voltage flicker with user side.
5. determine the device of voltage flicker primary responsibility party as claimed in claim 4, it is characterized in that, also comprise:
Threshold value determination unit, for statistics
with
the simulation experiment result during jack per line, according to described the simulation experiment result definite threshold COEFFICIENT K
downand K
upvalue.
6. determine the device of voltage flicker primary responsibility party as claimed in claim 4, it is characterized in that,
Described 3rd computing unit specifically for: according to formula
and
obtain user side load impedance to fluctuate the points of common connection voltage fluctuation component Δ V caused
pccc, wherein Δ V
pccsfor the points of common connection voltage fluctuation component that system side voltage fluctuation causes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110367781.4A CN102495303B (en) | 2011-11-18 | 2011-11-18 | Method and device for determining main responsible party of voltage flicker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110367781.4A CN102495303B (en) | 2011-11-18 | 2011-11-18 | Method and device for determining main responsible party of voltage flicker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102495303A CN102495303A (en) | 2012-06-13 |
| CN102495303B true CN102495303B (en) | 2015-07-22 |
Family
ID=46187144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110367781.4A Active CN102495303B (en) | 2011-11-18 | 2011-11-18 | Method and device for determining main responsible party of voltage flicker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102495303B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749555A (en) * | 2012-06-20 | 2012-10-24 | 广东电网公司电力科学研究院 | Flicker source positioning method in power supply system |
| CN102928644B (en) * | 2012-10-16 | 2015-01-07 | 华锐风电科技(集团)股份有限公司 | Method and device for detecting voltage flicker of grid-connected point of wind turbine generator system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1742208A (en) * | 2002-12-23 | 2006-03-01 | 联合动力股份公司 | Measuring method for deciding direction to a flickering source |
| CN101075742A (en) * | 2007-04-13 | 2007-11-21 | 东南大学 | Network harmonic and flash comprehensive inhibitor |
| CN201378182Y (en) * | 2009-03-31 | 2010-01-06 | 哈尔滨今日电子有限公司 | Voltage flicker measuring device |
-
2011
- 2011-11-18 CN CN201110367781.4A patent/CN102495303B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1742208A (en) * | 2002-12-23 | 2006-03-01 | 联合动力股份公司 | Measuring method for deciding direction to a flickering source |
| CN101075742A (en) * | 2007-04-13 | 2007-11-21 | 东南大学 | Network harmonic and flash comprehensive inhibitor |
| CN201378182Y (en) * | 2009-03-31 | 2010-01-06 | 哈尔滨今日电子有限公司 | Voltage flicker measuring device |
Non-Patent Citations (1)
| Title |
|---|
| 电压闪变测量的数字化实现;叶韵;《电力电子》;20101231(第2期);29-30,55 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102495303A (en) | 2012-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101299867B (en) | Method, apparatus and system for detecting network cover | |
| CN105158722A (en) | Evaluation method for performance index of electric energy meter | |
| CN101957396B (en) | On-line monitoring device and method for voltage quality of electric power system | |
| RU2011101617A (en) | DEVICE AND METHOD FOR CALCULATING THE NUMBER OF EXTENDING SPECTRA | |
| CN102879661A (en) | Method and system for detecting distribution network automatic terminal | |
| CN103019902A (en) | Automatic testing device and automatic testing method of ARINC 429 bus signal performance parameters | |
| CN102539910A (en) | Intelligent electricity meter capable of analyzing quality of electric energy and method for metering and analyzing quality by using intelligent electricity meter | |
| CN103837777B (en) | Electric power system electricity quality evaluation method and system | |
| CN105652155A (en) | Transformer substation grounding grid fault corrosion monitoring method and system | |
| CN104483626A (en) | Device and system for testing characteristics of transformer on-load tap-changer | |
| CN102495303B (en) | Method and device for determining main responsible party of voltage flicker | |
| CN103197170A (en) | Test method, test device, control device and system of voltage stabilizer | |
| CN203337759U (en) | Online state monitoring system for MOAs (metal oxide arresters) for power transmission line | |
| CN201489070U (en) | Arrester detecting device | |
| CN112381467A (en) | Artificial intelligence line loss analysis system based on big data of distribution station district total collection | |
| CN103018584A (en) | Measuring and verifying method for electric power and electric quantity conservation of electric power boost reconstruction | |
| CN203595760U (en) | Insulator safety status detection system | |
| CN102749561A (en) | Cloud service-based partial discharge transient-stage earth electric wave cloud detection method and device | |
| CN200986583Y (en) | Railway signal ZPW-2000 equipment transmitter automatic detection device | |
| CN101908927B (en) | Method for extrapolating and testing sensitivity of light receiving device | |
| CN205961116U (en) | With electric information collection fault detection of system device | |
| CN106353625B (en) | The voltage power-less regulating effect detection method and system of substation | |
| CN209675671U (en) | Improve the control device of laser stability | |
| CN205103345U (en) | Monitoring system of looped netowrk cabinet | |
| CN101398452A (en) | Computation method of dynamic electric energy index of quality based on 100kHz frequency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 530023 Democratic Road, the Guangxi Zhuang Autonomous Region, Nanning, No. 6-2 Patentee after: Electric Power Research Institute of Guangxi Power Grid Company Patentee after: BEIJING YUPONT ELECTRIC POWER TECHNOLOGY CO., LTD. Address before: 530023 Democratic Road, the Guangxi Zhuang Autonomous Region, Nanning, No. 6-2 Patentee before: Electric Power Research Institute of Guangxi Power Grid Company Patentee before: Beijig Yupont Electric Power Technology Co., Ltd. |