CN2236188Y - Numerically-controlled network power factor compensator - Google Patents
Numerically-controlled network power factor compensator Download PDFInfo
- Publication number
- CN2236188Y CN2236188Y CN 95204838 CN95204838U CN2236188Y CN 2236188 Y CN2236188 Y CN 2236188Y CN 95204838 CN95204838 CN 95204838 CN 95204838 U CN95204838 U CN 95204838U CN 2236188 Y CN2236188 Y CN 2236188Y
- Authority
- CN
- China
- Prior art keywords
- power factor
- electric network
- throw
- controlling
- derailing switch
- 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.)
- Expired - Lifetime
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- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The utility model relates to a digital controlling network power factor compensator, which is composed of a derailing switch and a control unit. The utility model is characterized in that a controlled silicon is connected in antiparallel with a diode to form a three phase controlling derailing switch, the input terminal of the derailing switch is connected with an electric network, the three phase controlling derailing switch and a capacitor form a triangular connection, and the controlling terminal of the controlled silicon is connected with a digital control power factor controller. A three phase controlled silicon derailing switch circuit and a digital controlling power factor controlling circuit are adopted by the utility model, the instructions of the throw-in and throw-off of a capacitor bank can be automatically sent according to the real-time power factors of an electric network, the throw-in and throw-off of the capacitor bank of the electric network is in 90 DEG after the 0 o'clock, the compensation of the power factor to the electric network can be realized, and the current of the throw-in and throw-off of the capacitor bank does not impact an electric network.
Description
The utility model belongs to the power factor of electric network compensation arrangement, is by changing to the electrical network opening-closing capacitor bank according to power factor of electric network, realizing the device of power factor of electric network compensation.
In existing power factor of electric network compensation technique, all adopt six controllable silicons to be connected into the Y type and realize compensation power factor of electric network in the mode of electrical network zero crossing opening-closing capacitor bank as electronic switch and capacitor group.But the silicon controlled cost is higher than diode more than 3 times.Big at electrical network operating passing zero capacitor group rush of current, generally above 20-40 times of the compensation arrangement rated current, controllable silicon is selected more a lot greatly than compensator capacity, the cost height.
The purpose of this utility model is a kind of novel numerical control power factor of electric network compensation arrangement of design, it adopts three-phase controllable silicon derailing switch and numerical control power factor controller to form, it can send the instruction of opening-closing capacitor bank automatically according to the realtime power factor of electrical network, automatically the power factor of electric network online in real time is compensated, this installation cost is low, and the opening-closing capacitor bank electric current does not have impact to electrical network.
Numerical control power factor of electric network compensation arrangement of the present utility model, form by derailing switch, numerical control power factor controller, it is characterized in that: derailing switch is formed three-phase gate-controlled switch device by three controllable silicons and three diode inverse parallels, three-phase gate-controlled switch device input connects with electrical network, three-phase gate-controlled switch device is formed triangle with capacitor and is connected, and the SCR control end of three-phase gate-controlled switch device connects with the numerical control power factor controller.
Controller constitutes the numerical control power factor controller by 90 ° of synchronizing indicators, single-chip microcomputer, pulse drivers.
Occupation mode of the present utility model is, automatically send the instruction of opening-closing capacitor bank according to the realtime power factor of electrical network by the numerical control power factor controller, by three-phase controllable silicon switches set 90 ° of opening-closing capacitor bank behind the electrical network zero crossing, automatically the power factor of electric network online in real time is compensated.
Numerical control power factor of electric network compensation arrangement of the present utility model, its advantage is, owing to adopt three-phase gate-controlled switch device, in 90 ° of opening-closing capacitor bank of electrical network zero crossing, it is to rely on three controllable silicons, three three-phase gate-controlled switch devices that diode constitutes, and cost is low, the opening-closing capacitor bank electric current does not have impact to electrical network, has realized the purpose to the level and smooth control of power factor of electric network.With three-phase gate-controlled switch device zero crossing the power network compensation device is compared, cost is low, and electrical network is not had impact.The utility model is applicable to the power factor of electric network compensation.
Below in conjunction with drawings and Examples numerical control power factor of electric network compensation arrangement is described further.
Fig. 1 is a numerical control power factor of electric network compensation arrangement schematic diagram
Fig. 2 is the schematic diagram of numerical control power factor of electric network controller
As figure shows, numerical control power factor of electric network compensation arrangement of the present utility model, form by derailing switch, numerical control power factor controller, it is characterized in that: derailing switch is formed three-phase gate-controlled switch device 2 by three controllable silicons and three diode inverse parallels, three-phase gate-controlled switch device input connects with electrical network 1, three-phase gate-controlled switch device connects with capacitor group 3 triangularities, and the SCR control end 4 of three-phase gate-controlled switch device connects with numerical control power factor controller 5.
Controller constitutes the numerical control power factor controller by 90 ° of synchronizing indicators 6, single-chip microcomputer 7, pulse driver 8, the also power factor controller that can use the Xi'an power transmission and transformation to be produced, 90 ° of opening-closing capacitor bank behind the electrical network zero crossing constitute the power factor of electric network compensation control circuit.
Claims (1)
1, a kind of numerical control power factor of electric network compensation arrangement, form by derailing switch, numerical control power factor controller, it is characterized in that: derailing switch is formed three-phase gate-controlled switch device by three controllable silicons and three diode inverse parallels, three-phase gate-controlled switch device input connects with electrical network, three-phase gate-controlled switch device is formed triangle with capacitor and is connected, and the SCR control end of three-phase gate-controlled switch device connects with the numerical control power factor controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95204838 CN2236188Y (en) | 1995-03-15 | 1995-03-15 | Numerically-controlled network power factor compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95204838 CN2236188Y (en) | 1995-03-15 | 1995-03-15 | Numerically-controlled network power factor compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2236188Y true CN2236188Y (en) | 1996-09-25 |
Family
ID=33857231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95204838 Expired - Lifetime CN2236188Y (en) | 1995-03-15 | 1995-03-15 | Numerically-controlled network power factor compensator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2236188Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072854C (en) * | 1997-12-30 | 2001-10-10 | 武汉水利电力大学 | Zero transition procedue triggering two-control-three capacitor switching method and appts. |
-
1995
- 1995-03-15 CN CN 95204838 patent/CN2236188Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072854C (en) * | 1997-12-30 | 2001-10-10 | 武汉水利电力大学 | Zero transition procedue triggering two-control-three capacitor switching method and appts. |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |