CN201898335U - Manual/automatic ladder type redundant capacitor compensation device - Google Patents
Manual/automatic ladder type redundant capacitor compensation device Download PDFInfo
- Publication number
- CN201898335U CN201898335U CN2010206533967U CN201020653396U CN201898335U CN 201898335 U CN201898335 U CN 201898335U CN 2010206533967 U CN2010206533967 U CN 2010206533967U CN 201020653396 U CN201020653396 U CN 201020653396U CN 201898335 U CN201898335 U CN 201898335U
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- capacitor
- capacitors
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- controller
- redundant capacitor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model provides a manual/automatic ladder type redundant capacitor compensation device, which comprises an on-off control cabinet, wherein the on-off control cabinet is provided with a manual/automatic switching knob, a start button and a stop button; and a three-phase power supply in the on-off control cabinet is connected with a load through a controller. The compensation device is characterized in that the controller successively passes through indoor cross-core current transformers (CT1 to CT4), a fuse (FU) and a vacuum contactor (CKG) and is then connected to capacitors; the capacitors comprise multiple groups of capacitor banks which have different sizes and are mutually connected in parallel; and all the capacitor banks are connected in parallel with corresponding matched redundant capacitor banks. The capacitors are compensated in a ladder switching manner through being grouped according to the power level of the capacitors, and are compensated in sequence from big to small; each group of capacitors is additionally provided with the redundant capacitor banks with the same power; and the compensation device performs a function of automatically detecting capacitor damage, and additionally performs a function of automatically detecting and starting to use another group of capacitors when one group of capacitors are damaged, so harmonic interference is effectively reduced, the quality of the electric energy is improved, the service life of the equipment is prolonged, and the efficiency of the equipment is improved.
Description
Technical field
The utility model relates to a kind of device that carries out the ladder compensation according to dynamic capacity, is specifically related to the automatic staged redundant capacitor of a kind of hand compensation arrangement.
Background technology
At present, in practical power systems, most of load is inductive loads such as asynchronous motor.Its equivalent electric circuit can be regarded the series circuit of resistance and inductance as, and the phase difference of its voltage and electric current is bigger, and power factor is lower.Behind the shunt capacitor, the electric current of capacitor will be offset a part of inductive current, thereby inductive current is reduced, and total current reduces thereupon, and the phase difference of voltage and electric current diminishes, and power factor is improved.
Factory's low voltage equipment generally can cause the power factor of electrical network to reduce, and lower power factor has often reduced utilization rate of equipment and installations, has increased the investment of power supply, has reduced service life of equipment, has increased line loss greatly, brings very big energy waste.At these disadvantageous power supply factors, power factor of electric network is effectively improved.If but all will to be provided and be transmitted at a distance by generator be irrational to these reactive powers, also is impossible usually.Reasonable approach is exactly to produce reactive power in the place that needs reactive power, promptly increases reactive power compensating apparatus and device.Utilize the electric current of electric capacity generation and the electric current of inductance generation that negative function is arranged, make the total current that flows through electrical network reduce, heat energy loss reduces, and the voltage and current phase place diminishes, and power factor improves, and reaches remarkable energy saving effect.Yet existing Electric capacity compensation device all is a disposable compensation, rather than according to the reduction of power factor what, drop into according to the size of capacitance compensation.Do not consider capacitor switching whether according to amount of capacity suitable select switching, whether hand can be selected automatically, redundancy group switching after capacitor damages or the like.These all may cause the precision of compensation not enough, have influence on normal operation and the quality of power supply and the energy-saving effect of equipment.
Summary of the invention
It all is that disposable compensation causes the not enough problem of compensation precision that the utility model will overcome existing capacitance compensation, and the automatic staged redundant capacitor of the hand compensation arrangement of a kind of capacitor size grouping ladder switching compensation is provided.
The technical solution of the utility model is:
The automatic staged redundant capacitor of hand compensation arrangement, comprise the switch control cubicle, described switch control cubicle is provided with hand/adaptive switched knob, start button and stop button, three phase mains in the described switch control cubicle is connected with load by controller, it is characterized in that: described controller passes through indoor straight-through current transformer (CT1-CT4) successively, fuse (FU) and vacuum contactor (CKG) insert capacitor again, described capacitor comprises the capacitance group parallel with one another that many groups differ in size, and described capacitance group all is parallel with the redundant capacitor group of corresponding cooperation.
Further, described controller is connected with outdoor straight-through current transformer (CT) with the voltage transformer that is used for detection of grid power factor size (PT).
Further, described three phase mains connects load again by reactor.
Technical conceive of the present utility model: shunt capacitor, total current reduce thereupon in electrical network, reach energy-saving effect, guarantee the quality of power supply, improve service life of equipment and efficient.The electric power incoming line side is to go to connect load again through behind the reactor earlier, guarantees the current stability when capacitor switches in proper order.Hand/automatic switchover realizes artificial manual operation and operates automatically by controller.The compensation of capacitor size grouping ladder switching, and every group capacitor all is parallel with the redundant capacitor group, many groups that differ in size, one uses a redundancy.Indoor straight-through current transformer detects the electric current that flows through capacitor, detects the electric capacity quality automatically, so that switching during redundancy; Fuse plays the current protection effect; Vacuum contactor plays the control on-off action.
Operation principle: three phase network is connected with load by controller, and controller passes through indoor straight-through current transformer (CT1-CT4), fuse (FU), vacuum contactor (CKG) successively and inserts multiple unit capacitor again.
Control loop, by voltage transformer (PT) and outdoor straight-through current transformer (CT), the size of the power factor in the detection of grid compares with the power factor set point by controller.If be lower than set point, the controller switches amount is by corresponding default output, makes corresponding vacuum contactor adhesive, and corresponding capacitance group comes into operation.
Staged switching function is realized by the many groups of capacitors that differ in size.The inner deviate size of controller according to the output of the determine switch amount of presetting intelligence, thereby selects the most reasonable capacitor to come into operation.
Redundancy feature, every group capacitor all have one group of redundant capacitor, and it is unusual to detect current value by current transformer, feeds back to controller, then the switching redundancy group.
Hand/automatic switching function, hand/automatic switchover knob are beaten when " manually " state, and the input of every group capacitor can be passed through start button, and stop button carries out the manual operation switching, and control capacitor and redundant capacitor device can come into operation respectively under the manual case.When beating at " automatically " state, capacitor is controlled automatically by controller, and whether decision comes into operation, and the redundant capacitor device is only just understood automatic switching when the capacitor fault.
The utlity model has following beneficial effect is:
Compensate according to capacitor power size packets ladder switching, compensation successively from big to small, and every group capacitor all increases the redundant capacitor of equal-wattage group, and be provided with the automatic measuring ability of capacitance damage, wherein one group of another group of capacitance damage detects and enables function automatically, effectively reduces Harmonic Interference.Not only can the guaranteed output factor normal, saves energy, the support equipment utilance reduces Harmonic Interference, improves the quality of power supply, also realizes the staged switching, and precision is higher; Realize that the hand automatic control mode switches handled easily; The basic redundant capacitor unperturbed of realizing switches guarantee power network safety operation, raising service life of equipment and efficient under the situation of reactor being equipped with.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the door-plate schematic diagram of switch control cubicle.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
With reference to Fig. 1-Fig. 2, the automatic staged redundant capacitor of hand described in the utility model compensation arrangement, comprise the switch control cubicle, described switch control cubicle is provided with hand/adaptive switched knob, start button and stop button, three phase mains in the described switch control cubicle is connected with load by controller, described controller passes through indoor straight-through current transformer (CT1-CT4) successively, fuse (FU) and vacuum contactor (CKG) insert capacitor again, described capacitor comprises the capacitance group parallel with one another that many groups differ in size, and described capacitance group all is parallel with the redundant capacitor group of corresponding cooperation.
Described controller is connected with outdoor straight-through current transformer (CT) with the voltage transformer that is used for detection of grid power factor size (PT).
Described three phase mains connects load again by reactor.
Technical conceive of the present utility model: shunt capacitor, total current reduce thereupon in power supply, reach energy-saving effect, guarantee the quality of power supply, improve service life of equipment and efficient.The electric power incoming line side is to go to connect load again through behind the reactor earlier, guarantees the current stability when capacitor switches in proper order.Hand/automatic switchover realizes artificial manual operation and operates automatically by controller.The compensation of capacitor size grouping ladder switching, and every group capacitor all is parallel with the redundant capacitor group, many groups that differ in size, one uses a redundancy.Indoor straight-through current transformer detects the electric current that flows through capacitor, detects the electric capacity quality automatically, so that switching during redundancy; Fuse plays the current protection effect; Vacuum contactor plays the control on-off action.
Operation principle: three phase mains is connected with load by controller, and controller passes through indoor straight-through current transformer (CT1-CT4), fuse (FU), vacuum contactor (CKG) successively and inserts multiple unit capacitor again.
Control loop by voltage transformer (PT) and outdoor straight-through current transformer (CT), detects the size of the power factor in the power supply by controller, compares with the power factor set point.If be lower than set point, the controller switches amount is by corresponding default output, makes corresponding vacuum contactor adhesive, and corresponding capacitance group comes into operation.
Staged switching function is realized by the many groups of capacitors that differ in size.The inner deviate size of controller according to the output of the determine switch amount of presetting intelligence, thereby selects the most reasonable capacitor to come into operation.
Redundancy feature, every group capacitor all have one group of redundant capacitor, and it is unusual to detect current value by current transformer, feeds back to controller, then the switching redundancy group.
Hand/automatic switching function, hand/automatic switchover knob are beaten when " manually " state, and the input of every group capacitor can be passed through start button, and stop button carries out the manual operation switching, and control capacitor and redundant capacitor device can come into operation respectively under the manual case.When beating at " automatically " state, capacitor is controlled automatically by controller, and whether decision comes into operation, and the redundant capacitor device is only just understood automatic switching when the capacitor fault.
The described content of this specification embodiment only is enumerating the way of realization of utility model design; protection range of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection range of the present utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.
Claims (3)
1. the automatic staged redundant capacitor of hand compensation arrangement, comprise the switch control cubicle, described switch control cubicle is provided with hand/adaptive switched knob, start button and stop button, three phase mains in the described switch control cubicle is connected with load by controller, it is characterized in that: described controller passes through indoor straight-through current transformer (CT1-CT4) successively, fuse (FU) and vacuum contactor (CKG) insert capacitor again, described capacitor comprises the capacitance group parallel with one another that many groups differ in size, and described capacitance group all is parallel with the redundant capacitor group of corresponding cooperation.
2. the automatic staged redundant capacitor of hand according to claim 1 compensation arrangement is characterized in that: described controller is connected with outdoor straight-through current transformer (CT) with the voltage transformer that is used for detection of grid power factor size (PT).
3. the automatic staged redundant capacitor of hand according to claim 1 and 2 compensation arrangement, it is characterized in that: described three phase mains connects load again by reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206533967U CN201898335U (en) | 2010-12-11 | 2010-12-11 | Manual/automatic ladder type redundant capacitor compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206533967U CN201898335U (en) | 2010-12-11 | 2010-12-11 | Manual/automatic ladder type redundant capacitor compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201898335U true CN201898335U (en) | 2011-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206533967U Expired - Lifetime CN201898335U (en) | 2010-12-11 | 2010-12-11 | Manual/automatic ladder type redundant capacitor compensation device |
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| Country | Link |
|---|---|
| CN (1) | CN201898335U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437893A (en) * | 2017-08-04 | 2017-12-05 | 温岭阿凡达机电有限公司 | A kind of PFC control circuit and its control method |
| CN108574293A (en) * | 2018-04-12 | 2018-09-25 | 国网山东省电力公司菏泽供电公司 | A kind of control method of compensation unbalanced power grid load |
-
2010
- 2010-12-11 CN CN2010206533967U patent/CN201898335U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437893A (en) * | 2017-08-04 | 2017-12-05 | 温岭阿凡达机电有限公司 | A kind of PFC control circuit and its control method |
| CN107437893B (en) * | 2017-08-04 | 2020-03-27 | 温岭阿凡达机电有限公司 | PFC control circuit and control method thereof |
| CN108574293A (en) * | 2018-04-12 | 2018-09-25 | 国网山东省电力公司菏泽供电公司 | A kind of control method of compensation unbalanced power grid load |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110713 |