CN103683295B - Power distribution network regulator - Google Patents
Power distribution network regulator Download PDFInfo
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- CN103683295B CN103683295B CN201310612069.5A CN201310612069A CN103683295B CN 103683295 B CN103683295 B CN 103683295B CN 201310612069 A CN201310612069 A CN 201310612069A CN 103683295 B CN103683295 B CN 103683295B
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Abstract
One power distribution network regulator, including: voltage check device, the first control switch, the second control switch, the 3rd control switch and transformator；The magnitude of voltage of the low-pressure side circuit of voltage check device detection distribution transformer, when magnitude of voltage is beyond the pressure value scope preset, output control signal controls first, second control switch Guan Bi, and output control signal controls the 3rd control and switches off；And when magnitude of voltage enters the pressure value scope preset, output control signal controls first, second control and switches off, and output control signal controls the 3rd control switch Guan Bi；Transformator carries out pressure regulation according to the transformation ratio set to the voltage of input.Above-mentioned power distribution network regulator, automatically engage transformator when fluctuation occurs in voltage and carry out transformation, transformator can be automatically exited from when voltage is normal, by bypass, user side is powered, user side quality of voltage is made effectively to be promoted, ensure that rate of qualified voltage, ensure power distribution network safe and stable operation.
Description
Technical field
The present invention relates to electric power project engineering field, particularly relate to a kind of power distribution network regulator.
Background technology
At present, in the supply line of power distribution network, it is weak that electric network composition remains comparison, there is ratio more serious
Problem, as little in low-voltage supply line half path length, line footpath etc..Such as, certain city 10kV circuit average length
16.24 kilometers, radius of low voltage power supply is long, and the whole city has 1219 low-voltage platform district radius of electricity supplys more than 500
Rice, accounts for the 76.57% of sum, and totally 161 low-voltage platform district radius of electricity supplys are more than 1500 meters, accounts for sum
10.11%, part low-voltage circuit is up to 2～3 kms, and low pressure backbone is only with Φ 16, Φ 25, the aluminum of Φ 35
Heart yearn is as backbone, and power load is little, fluctuation is big.
In power distribution network, the most universal a kind of phenomenon is: a Ge Tai district often to separate several branch lines,
Each branch line is for a small village electricity consumption farther out, and on each branch line, user is below 30 families, and user compares point
Dissipating, power load is at about 10kw, and load fluctuation is separate indefinite, and A phase increases sometimes, and B phase increases sometimes
High.User can be maintained in acceptability limit the voltage most of the time, but during concentrating electricity consumption, such as
User cooks period, and especially during the Spring Festival, cold weather, migrant person returns to one's native place the New Year, easily in short-term
Load boom period inside occur, now, terminal voltage will be pulled low, generally below 198V, time serious even
As little as about 170V, and can continue for some time.
In order to meet long transmission line terminal voltage problem, current power supply unit way is usually and distribution transforming tap is adjusted to
High tap position, although so can stablize the voltage of end, but can cause circuit head end overtension occur,
In this case head end voltage can be as high as 240V, terminal voltage as little as 170V, and this just has a strong impact on voltage
Stablize, voltage pulsation is big, and the quality of voltage that user obtains is poor, qualification rate is low.
Being directed to the problems referred to above, the conventional method of existing solution low-voltage problem is track remodelling or newly-built district.
If taking primary cable to change big line warp, can only cure the symptoms, not the disease, it is impossible to tackle the problem at its root,
And engineering cost is higher；If using newly-built district to split load, need to additionally set up high-tension line, increasing
Distribution transformer, this scheme implementation cycle is long, is difficult in short-term take effect, and engineering cost is higher, it is difficult to
Popularity is applied.
Summary of the invention
Based on this, it is necessary to for above-mentioned due to electricity consumption peak phase or Gu Qishi, voltage pulsation is big, causes voltage
The problem that of poor quality, qualification rate is low, it is provided that a kind of power distribution network regulator.
A kind of power distribution network regulator, including: voltage check device, the first control switch, the second control are opened
Close, the 3rd control switchs and transformator；
The low-pressure side connection of the input of described voltage check device and distribution transformer, and respectively with the
One controls switch, the second control switch and the 3rd control end controlling switch connects；
Described first control switch, transformator, the second control switch are sequentially connected with；Wherein, first controls to open
Closing the low-pressure side connection with described distribution transformer, described second controls switch and user side connection；
Described 3rd controls switch is connected to low-pressure side circuit and the user side connection of described distribution transformer
Between；
Described voltage check device is for detecting the magnitude of voltage of the low-pressure side circuit of distribution transformer, when described electricity
When pressure value exceeds default pressure value scope, described first control of output control signal control switchs, the second control
Switch closes, and output control signal controls the described 3rd and controls to switch off；And when described magnitude of voltage enters
When entering default pressure value scope, output control signal control described first controls switch, the second control switch breaks
Open, and output control signal controls the described 3rd and controls switch Guan Bi；
Described transformator carries out pressure regulation according to the transformation ratio set to the voltage of input.
A kind of power distribution network regulator, including: voltage check device, the first control switch, the second control are opened
Close, the 3rd control switchs and three-phase transformer；
Described first control switch, the second control switch, the 3rd control switch are three phase controlling switch；
The A phase of the input of described voltage check device and the low-pressure side circuit of distribution transformer, B phase, C
Mutually and the neutral conductor connects, and control switch respectively with first, second control switch and the 3rd and control switch
Control end connect；
Described first control switch, three-phase transformer, the second control switch are sequentially connected with；Wherein, the first control
System switch is connected with the A phase of low-pressure side circuit of described distribution transformer, B phase, C, and described second controls
System switch is connected with the A phase on user's side line road, B phase, C, the described three-phase transformer connection neutral conductor；
Described 3rd controls switch is connected to the A phase of low-pressure side circuit of described distribution transformer, B phase, C
Mutually with between the A phase of user side connection, B phase, C phase；
Described voltage check device is for detecting the low-pressure side circuit A phase of distribution transformer, B phase, C respectively
The magnitude of voltage of phase, when described magnitude of voltage is beyond the pressure value scope preset, output control signal controls described the
The uniline that one control switch, the second control switch closed pair are answered, and output control signal control is described
3rd controls to switch off the uniline of correspondence；And when described magnitude of voltage enters the pressure value scope preset,
The described first control switch of output control signal control, the second control switch off the uniline of correspondence, with
And output control signal controls the described 3rd and controls the uniline that switch closed pair is answered；
The voltage of corresponding uniline input is entered respectively by described three-phase transformer according to the transformation ratio set
Row pressure regulation.
Above-mentioned power distribution network regulator, may be used in uniline and three-phase line, by distribution being detected
The low-pressure side line voltage distribution of transformator, and control transformator according to the low-pressure side line voltage distribution of distribution transformer
Throwing is moved back, and Dang Taiqu is in peak phase or Gu Qishi, and voltage occurs that fluctuation, voltage check device detection magnitude of voltage surpass
When going out default pressure value scope, automatically engaging transformator and carry out transformation, Shi Tai district Control of Voltage is in certain limit
In, meet voltage request.When running in platform district is in normal range, the magnitude of voltage of detection is in default pressure
In the range of value, automatically exiting from transformator, be powered user side by bypass, platform district voltage meets requirement,
So that user side quality of voltage is effectively promoted, it is ensured that rate of qualified voltage, ensure power distribution network safety
Stable operation.
Accompanying drawing explanation
Fig. 1 is the power distribution network regulator structural representation of the uniline of the present invention；
Fig. 2 is the power distribution network regulator structural representation of the uniline of an embodiment；
Fig. 3 is the structural representation of the voltage check device of uniline；
Fig. 4 is the power distribution network regulator structural representation of the three-phase line of the present invention；
Fig. 5 is the power distribution network regulator structural representation of the three-phase line of an embodiment；
Fig. 6 is the structural representation of the voltage check device of three-phase line.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the power distribution network regulator of the present invention is described in detail.
Shown in Figure 1, Fig. 1 is the power distribution network regulator structural representation of the uniline of the present invention,
Specifically include that voltage check device, the first control switch, the second control switch, the 3rd control switch and becomes
Depressor.
The input of described voltage check device is connected with the low-pressure side circuit (mains side) of distribution transformer,
And the control end controlling switch, the second control switch and the 3rd control switch respectively with first is connected；
Described first control switch, transformator, the second control switch are sequentially connected with；Wherein, first controls to open
Closing the low-pressure side connection with described distribution transformer, described second controls switch and user side connection；
Described 3rd controls switch is connected to low-pressure side circuit and the user side connection of described distribution transformer
Between；
Described voltage check device is for detecting the magnitude of voltage of the low-pressure side circuit of distribution transformer, when described electricity
When pressure value exceeds default pressure value scope, described first control of output control signal control switchs, the second control
Switch closes, and output control signal controls the described 3rd and controls to switch off；And when described magnitude of voltage enters
When entering default pressure value scope, output control signal control described first controls switch, the second control switch breaks
Open, and output control signal controls the described 3rd and controls switch Guan Bi；
Described transformator carries out pressure regulation according to the transformation ratio (1:k) set to the voltage of input；General feelings
Under condition, k value is between 1.1 to 1.2, specifically can be set according to practical service environment.
In one embodiment, shown in Figure 2, Fig. 2 is the power distribution network of the uniline of an embodiment
Regulator structural representation, in the present embodiment, voltage check device is connected with transformator, voltage detecting
Device is additionally operable to calculate no-load voltage ratio parameter according to described magnitude of voltage, and according to the no-load voltage ratio state modulator transformator calculated
Transformation ratio.
According to the power distribution network regulator of above-described embodiment, Intelligent adjustment transformator can be carried out according to change in voltage
Transformation ratio so that user side obtains stable magnitude of voltage, improve power supply quality, it is ensured that
Rate of qualified voltage, has ensured power distribution network safe and stable operation.
In one embodiment, shown in Figure 3, Fig. 3 is the structure of the voltage check device of uniline
Schematic diagram, including voltage detecting circuit and processor.
Wherein, the low-pressure side connection of the input of voltage detecting circuit and distribution transformer, outfan with
Processor connects；Processor and first controls switch, the second control switchs, the 3rd control switch connects.
Further, as in figure 2 it is shown, processor is also connected with transformator, processor is according to the voltage of detection
Value calculates no-load voltage ratio parameter, and according to the transformation ratio of the no-load voltage ratio state modulator transformator calculated.
In one embodiment, voltage check device calculates no-load voltage ratio parameter according to magnitude of voltage and includes equation below:
k=U0/Ux
Wherein, k is no-load voltage ratio parameter, U0For rated voltage, UxFor detecting the low-pressure side circuit of distribution transformer
Magnitude of voltage.
Shown in Figure 4, Fig. 4 is the power distribution network regulator structural representation of the three-phase line of the present invention；
Specifically include that voltage check device, first control switch, second control switch, the 3rd control switch and three
Phase transformer.
Described first control switch, the second control switch, the 3rd control switch are three phase controlling switch；
The A phase of the input of described voltage check device and the low-pressure side circuit of distribution transformer, B phase, C
Phase and the neutral conductor (N) connection, and switch and the 3rd control with the first control switch, the second control respectively
The control end of switch connects；
Described first control switch, three-phase transformer, the second control switch are sequentially connected with；Wherein, the first control
System switch is connected with the A phase of low-pressure side circuit (mains side) of described distribution transformer, B phase, C,
Described second controls switch is connected with the A phase on user's side line road, B phase, C, described three-phase transformer company
Connect to neutral；
Described 3rd controls switch is connected to the A phase of low-pressure side circuit of described distribution transformer, B phase, C
Mutually with between the A phase of user side connection, B phase, C phase；
Described voltage check device is for detecting the low-pressure side circuit A phase of distribution transformer, B phase, C respectively
The magnitude of voltage of phase, when described magnitude of voltage is beyond the pressure value scope preset, output control signal controls described the
The uniline that one control switch, the second control switch closed pair are answered, and output control signal control is described
3rd controls to switch off the uniline of correspondence；And when described magnitude of voltage enters the pressure value scope preset,
The described first control switch of output control signal control, the second control switch off the uniline of correspondence, with
And output control signal controls the described 3rd and controls the uniline that switch closed pair is answered；
Corresponding uniline is inputted respectively by described three-phase transformer according to the transformation ratio (1:k) set
Voltage carry out pressure regulation；Generally, k value is between 1.1 to 1.2, specifically can be according to actually used
Environment is set.
In one embodiment, with reference to shown in Fig. 5, Fig. 5 is the power distribution network of the three-phase line of an embodiment
Regulator structural representation；Voltage check device is connected with three-phase transformer, and voltage check device is additionally operable to
A phase, B phase, the no-load voltage ratio parameter of C phase is calculated according to described magnitude of voltage, and according to described no-load voltage ratio state modulator
The transformation ratio of the uniline that described three-phase transformer is corresponding.
According to the power distribution network regulator of above-described embodiment, Intelligent adjustment can be distinguished according to change in voltage and become
Depressor A phase, B phase, the transformation ratio of C phase, so that user side obtains stable magnitude of voltage,
Improve power supply quality, it is ensured that rate of qualified voltage, ensure power distribution network safe and stable operation.
In one embodiment, with reference to shown in Fig. 6, Fig. 6 is the structure of the voltage check device of three-phase line
Schematic diagram, voltage check device includes: the A phase voltage detection circuit, the B phase that are connected with centrage respectively are electric
Pressure testing circuit, C phase voltage detection circuit and processor；
Described A phase voltage detection circuit, B phase voltage detection circuit, the input of C phase voltage detection circuit
Being connected with the A phase of low-pressure side circuit of distribution transformer, B phase, C respectively, outfan is with processor even
Connect；Described processor and first controls switch, the second control switchs, the 3rd control switch connects.
Further, as it is shown in figure 5, processor is also connected with three-phase transformer；Processor is according to described electricity
Pressure value calculates A phase, B phase, the no-load voltage ratio parameter of C phase, and according to three phase transformations described in described no-load voltage ratio state modulator
The transformation ratio of the uniline that depressor is corresponding.
In one embodiment, include according to described magnitude of voltage calculating A phase, B phase, the no-load voltage ratio parameter of C phase
Equation below:
kA=U0/UA
kB=U0/UB
kC=U0/UC
Wherein, kAFor the no-load voltage ratio parameter of the low-pressure side circuit A phase of distribution transformer, kBFor distribution transformer
The no-load voltage ratio parameter of low-pressure side circuit B phase, kCFor the no-load voltage ratio parameter of the low-pressure side circuit C phase of distribution transformer,
U0For rated voltage.
The power distribution network regulator of each embodiment of summary, may be used in uniline and three-phase line,
By the low-pressure side line voltage distribution of distribution transformer being detected, and according to the low-pressure side line electricity of distribution transformer
The throwing of voltage-controlled transformator processed is moved back, and when Dang Taiqu is in the peak phase, low voltage, detection voltage is less than certain numerical value
Time, automatically engaging pressure regulator, Shi Tai district voltage improves, and meets voltage request.When platform district is in Gu Qishi,
Detection voltage is normal, automatically exits from pressure regulator, and by bypass power supply, platform district voltage meets requirement, so that
User side quality of voltage is effectively promoted.
Power distribution network regulator of the present invention can extensively apply ripe components and parts and equipment, is lost low, and profile is relatively
Little, it is simple to load and unload and transport, easy to maintenance, it is adaptable to outdoor operation, Durability is long, invests little, sees
Effect is fast, the problem that can effectively solve low-voltage, has been really achieved the effect of " scalp solves big problem ".
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, it is also possible to make some deformation and
Improving, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended
Claim is as the criterion.
Claims (10)
1. a power distribution network regulator, it is characterised in that be connected on the low-pressure side circuit of distribution transformer with
Between user's side line road, including: voltage check device, first control switch, second control switch, the 3rd
Control switch and transformator；
The low-pressure side connection of the input of described voltage check device and distribution transformer, and respectively with the
One controls switch, the second control switch and the 3rd control end controlling switch connects；
Described first control switch, transformator, the second control switch are sequentially connected with；Wherein, first controls to open
Closing the low-pressure side connection with described distribution transformer, described second controls switch and user side connection；
Described 3rd controls switch is connected between the low-pressure side circuit of described distribution transformer and user's side line road；
Described voltage check device is for detecting the magnitude of voltage of the low-pressure side circuit of distribution transformer, when described electricity
When pressure value exceeds default pressure value scope, described first control of output control signal control switchs, the second control
Switch closes, and output control signal controls the described 3rd and controls to switch off；And when described magnitude of voltage enters
When entering default pressure value scope, output control signal control described first controls switch, the second control switch breaks
Open, and output control signal controls the described 3rd and controls switch Guan Bi；
Described transformator carries out pressure regulation according to the transformation ratio set to the voltage of input.
Power distribution network regulator the most according to claim 1, it is characterised in that described voltage detecting fills
Putting and be connected with transformator, voltage check device is additionally operable to according to described magnitude of voltage calculating no-load voltage ratio parameter, and according to
The transformation ratio of transformator described in described no-load voltage ratio state modulator.
Power distribution network regulator the most according to claim 1, it is characterised in that described voltage detecting fills
Put and include voltage detecting circuit and processor；
The input of described voltage detecting circuit and the low-pressure side connection of distribution transformer, outfan and place
Reason device connects；
Described processor and first controls switch, the second control switchs, the 3rd control switch connects.
Power distribution network regulator the most according to claim 3, it is characterised in that described processor also with
Transformator connects.
Power distribution network regulator the most according to claim 3, it is characterised in that described according to described electricity
Pressure value calculates no-load voltage ratio parameter and includes:
K=U0/Ux
Wherein, k is no-load voltage ratio parameter, U0For rated voltage, UxFor detecting the low-pressure side circuit of distribution transformer
Magnitude of voltage.
6. a power distribution network regulator, it is characterised in that be connected on the low-pressure side circuit of distribution transformer with
Between user's side line road, including: voltage check device, first control switch, second control switch, the 3rd
Control switch and three-phase transformer；
Described first control switch, the second control switch, the 3rd control switch are three phase controlling switch；
The A phase of the input of described voltage check device and the low-pressure side circuit of distribution transformer, B phase, C
Mutually and the neutral conductor connects, and control switch respectively with first, second control switch and the 3rd and control switch
Control end connect；
Described first control switch, three-phase transformer, the second control switch are sequentially connected with；Wherein, the first control
System switch is connected with the A phase of low-pressure side circuit of described distribution transformer, B phase, C, and described second controls
System switch is connected with the A phase on user's side line road, B phase, C, the described three-phase transformer connection neutral conductor；
Described 3rd controls switch is connected to the A phase of low-pressure side circuit of described distribution transformer, B phase, C
Mutually with between the A phase on user's side line road, B phase, C phase；
Described voltage check device is for detecting the low-pressure side circuit A phase of distribution transformer, B phase, C respectively
The magnitude of voltage of phase, when described magnitude of voltage is beyond the pressure value scope preset, output control signal controls described the
The uniline that one control switch, the second control switch closed pair are answered, and output control signal control is described
3rd controls to switch off the uniline of correspondence；And when described magnitude of voltage enters the pressure value scope preset,
The described first control switch of output control signal control, the second control switch off the uniline of correspondence, with
And output control signal controls the described 3rd and controls the uniline that switch closed pair is answered；
The voltage of corresponding uniline input is entered respectively by described three-phase transformer according to the transformation ratio set
Row pressure regulation.
Power distribution network regulator the most according to claim 6, it is characterised in that described voltage detecting fills
Putting and be connected with three-phase transformer, voltage check device is additionally operable to calculate A phase, B phase, C according to described magnitude of voltage
The no-load voltage ratio parameter of phase, and according to the change of uniline corresponding to three-phase transformer described in described no-load voltage ratio state modulator
Pressure ratio example.
Power distribution network regulator the most according to claim 6, it is characterised in that described voltage detecting fills
Put and include: the A phase voltage detection circuit that is connected with centrage respectively, B phase voltage detection circuit, C phase are electric
Pressure testing circuit and processor；
Described A phase voltage detection circuit, B phase voltage detection circuit, the input of C phase voltage detection circuit
Being connected with the A phase of low-pressure side circuit of distribution transformer, B phase, C respectively, outfan is with processor even
Connect；
Described processor and first controls switch, the second control switchs, the 3rd control switch connects.
Power distribution network regulator the most according to claim 8, it is characterised in that described processor also with
Three-phase transformer connects.
Power distribution network regulator the most according to claim 8, it is characterised in that described in described basis
Magnitude of voltage calculating A phase, B phase, the no-load voltage ratio parameter of C phase include:
kA=U0/UA
kB=U0/UB
kC=U0/UC
Wherein, kAFor the low-pressure side circuit A phase D no-load voltage ratio parameter of distribution transformer, kBFor distribution transformer
The no-load voltage ratio parameter of low-pressure side circuit B phase, kCFor the no-load voltage ratio parameter of the low-pressure side circuit C phase of distribution transformer,
U0For rated voltage.
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| CN201310612069.5A CN103683295B (en) | 2013-11-26 | 2013-11-26 | Power distribution network regulator |
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| CN201310612069.5A CN103683295B (en) | 2013-11-26 | 2013-11-26 | Power distribution network regulator |
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| CN103683295B true CN103683295B (en) | 2016-08-24 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2874887Y (en) * | 2006-03-08 | 2007-02-28 | 金博尔电力节能科技(北京)有限公司 | Intelligent power saving device |
| CN201629583U (en) * | 2010-02-03 | 2010-11-10 | 河南省电力公司平顶山供电公司 | Automatic switching running device of distribution transformer set |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4385920B2 (en) * | 2004-10-25 | 2009-12-16 | 株式会社明電舎 | Voltage drop detection device |
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2013
- 2013-11-26 CN CN201310612069.5A patent/CN103683295B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2874887Y (en) * | 2006-03-08 | 2007-02-28 | 金博尔电力节能科技(北京)有限公司 | Intelligent power saving device |
| CN201629583U (en) * | 2010-02-03 | 2010-11-10 | 河南省电力公司平顶山供电公司 | Automatic switching running device of distribution transformer set |
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