CN110380428A - A kind of energy-saving circuit - Google Patents
A kind of energy-saving circuit Download PDFInfo
- Publication number
- CN110380428A CN110380428A CN201910684111.1A CN201910684111A CN110380428A CN 110380428 A CN110380428 A CN 110380428A CN 201910684111 A CN201910684111 A CN 201910684111A CN 110380428 A CN110380428 A CN 110380428A
- Authority
- CN
- China
- Prior art keywords
- motor
- energy
- compensator
- power
- saving circuit
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims description 30
- 238000004804 winding Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001095 motoneuron effect Effects 0.000 description 1
- 229960001296 zinc oxide Drugs 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
A kind of energy-saving circuit provided by the invention, including compensator, compensator is connect with the connecting terminal that need to compensate equipment, the compensator is also connect with earthed circuit, the present invention can effectively reduce the starting current of motor, the power loss of distribution system can be reduced, distribution transformer capacity can be reduced, improve the power factor of motor, the reactive component for obtaining motor from power grid is reduced, save electric energy, reduce system loss, clamp down on the high-voltage electricity generated when motor is out of service effectively, this higher voltage is set to be no more than the pressure resistance that motor can bear, ensure system safety.
Description
Technical field
The present invention relates to a kind of energy-saving circuits.
Background technique
Low-voltage power supply system generally comprises power transformer, low-tension switch cabinet, reactive power automatic compensator, motor and opens
Dynamic equipment, threephase asynchronous, machine for producing tool equipment etc..Power transformer is for being depressured high-voltage electricity for lower voltage
It is used for electrical equipments such as threephase asynchronouses, the effect of low-tension switch cabinet is distribution electric energy while being used to protect power transformer
Device, the effect of reactive power automatic compensator are to carry out reactive power to low-voltage power supply system automatically according to load variations situation
Compensation, increase power factor reduce the loss of voltage, and electric motor starting equipment is used for the biggish motor of starting capacity, motor
Effect is to convert electrical energy into mechanical energy, drives manufacturing machine work.
Most of electrical equipment category inductive load in low-voltage power supply system, such as threephase asynchronous and transformer, this
A little inductive loads need to establish rotating excitation field in power supply-distribution system operational process, can consume a large amount of reactive power, reduce for matching
The power factor of electric system in turn results in the increasing of the power and distribution supply cable loss of voltage and electric energy loss, in addition, for some impacts
Load or burden without work can also generate violent voltage fluctuation, deteriorate the power supply quality of power grid, cause motor start-up difficult or frequent
Start and stop cause to burn, and this influence shows particularly evident especially in the use of high power motor.In addition, because of idle electricity
The increase of stream can cause power supply line and electrical equipment insulation decline, aging, easily cause the failures such as electric leakage, short circuit.And solve this
The most basic method of a little problems is exactly to carry out reactive power compensation.The Reactive Compensation Mode that present most enterprises use all is collection
The usual way of Chinese style compensation way, the compensation way is, using fixed installation or automatic switching mode in power supply-distribution system
Capacitive apparatus, these capacitive apparatus such as access shunt capacitor can compensate part consumed by inductive load in power supply-distribution system
Reactive power reduces reactive power and flows on power grid, to reduce power and distribution supply cable electric energy loss, improves power supply-distribution system function
Rate factor improves operation of power networks condition.
Reactive power automatic compensator in low-voltage power supply system typically takes the side of delay investment switching cycle
Formula work, when the biggish motor start-up of capacity in system, starting current is 4~7 times of its rated current, and some can also energy
Reach 10 times, in the moment of starting, when exactly needing to obtain compensation, but reactive power automatic compensator will be delayed ten
Just put into one group of capacitor within even tens seconds several seconds, delay time arrives, and when first group of compensating electric capacity of investment, perhaps start-up course has been
Through terminating, besides the biggish motor start-up of capacity, the capacitance for needing to compensate also can be larger, one group be it is far from being enough, again
To pass through certain time-delay, can just automatically engage second group, third group, at this moment, start-up course is early completed in motor, has been not required to
Want great compensating electric capacity.
Reactive power on-site compensation device directly connects on motor terminals and motor while devoting oneself to work while moving back
It runs out.When motor is out of service, since motor rotation has certain inertia, motor will continue to rotate, compensation electricity
To hold and is at this moment discharged by machine winding, machine winding impedance is very low, and discharge current is larger, this discharge current is passed through winding,
It is equivalent to and gives motor excitation, motor is equivalent to a generator, and excessive excitation current generates motor instantaneously very high
Voltage, this high voltage is if it exceeds motor is pressure-resistant, it is possible to puncture system insulation, cause the accident.
Such as a kind of low-voltage induction motor reactive power on-site compensation device of Publication No. CN206559259U, capacitor does not connect
Varistor is connect, motor instantaneously generates very high voltage, this high voltage is if it exceeds motor is pressure-resistant, it is possible to it is exhausted to puncture system
Edge.
Such as Publication No. CN99252136 motor local compensation reduced-voltage starting cabinet, compensation capacitor is mounted on opening for motor
In dynamic circuit, compensation capacitor does not have protection against excessive pressure, and capacitor is shorted when electric motor starting, does not play reduction starting
The effect of electric current.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of energy-saving circuits.
The present invention is achieved by the following technical programs.
A kind of energy-saving circuit provided by the invention；Including compensator, compensator and the connecting terminal that equipment need to be compensated
Connection, the compensator are also connect with earthed circuit.
The compensator is three capacitors for being connected into the connection of triangle shape or star-like connection.
Three capacitor one end interconnected of triangle connection are common end, what three capacitors of star-like connection were not connected with
One end is common end, and common end is connect with that need to compensate equipment.
The earthed circuit include three current-limiting resistances and three varistors, three current-limiting resistance one end respectively with benefit
The common end connection of device is repaid, the other end of resistance is connect with three varistors respectively, the other end ground connection of varistor.
The equipment that need to compensate is the internal equipment with coil or winding.
Any one capacitor of the compensator is also parallel with indicator light.
The compensator is mounted in cabinet, and cabinet is mounted on nearby on the wall or cylinder that need to be compensated near equipment.
The beneficial effects of the present invention are: the starting current of motor can be reduced, the power loss of distribution system can be reduced, it can
Distribution transformer capacity is reduced, the power factor of motor is improved, the reactive component obtained from power grid is reduced, and saves electric energy, drop
Low system loss clamps down on the high-voltage electricity generated when motor is out of service effectively, this higher voltage is made to be no more than electricity
The pressure resistance that machine can bear, it is ensured that system safety.
Detailed description of the invention
Fig. 1 is electrical machine energy-saving consumption reduction circuit diagram of the invention；
Fig. 2 is Energy Saving for Transformer circuit diagram of the invention.
Specific embodiment
Be described further below technical solution of the present invention, but claimed range be not limited to it is described.
A kind of energy-saving circuit；Including compensator, compensator is connect with the connecting terminal that need to compensate equipment, the compensation
Device is also connect with earthed circuit.
The compensator is three capacitors for being connected into triangle connection or star-like connection.
Three capacitor one end interconnected of triangle connection are common end, what three capacitors of star-like connection were not connected with
One end is common end, and common end is connect with that need to compensate equipment.
The earthed circuit include three current-limiting resistances and three varistors, three current-limiting resistance one end respectively with benefit
The common end connection of device is repaid, the other end of resistance is connect with three varistors respectively, the other end ground connection of varistor.
The equipment that need to compensate is the internal equipment with coil or winding.
Any one capacitor of the compensator is also parallel with indicator light.
The compensator is mounted in cabinet, and cabinet is mounted on nearby on the wall or cylinder that need to be compensated near equipment.
The determination of compensation capacity generally carries out calculating determination by the power factor after capacity motor and compensation precompensation, or
Person carries out calculating determination by capacity motor, number of poles, no-load current size, is not often inconsistent with actual conditions.In fact, the life of motor
It is different to produce producer, no-load current, rated current, starting current etc. have different, and a motor without manufacturing machine or takes
Bottom pulley No Load Start, takes production equipment No Load Start at band upper belt pulley No Load Start, starting current, active power,
The electrical parameters such as reactive power, apparent energy are all discrepant.Best bet takes production and sets aiming at certain motor
Standby No Load Start, and the electrical parameters such as actual measurement starting current, active power, reactive power, apparent energy, are arrived with actual measurement
Reactive power subject to come determine compensation power capacitor capacity, in this way with actual conditions very coincide, behaving will
Ensuring will not occurrence risk.
The configuration of varistor will be such that it is safely operated within the scope of 1.3~1.5 times of system voltages, be adjacent to and below
Conducting in the pressure tests such as motor, power capacitor voltage, it is ensured that the high-voltage electricity that excitation operation generates be unlikely to puncture motor,
The insulation of power capacitor and the other equipment of system, clamps down on the high-voltage electricity generated when motor is out of service effectively, makes this
A higher voltage is no more than the pressure resistance that motor can bear, it is ensured that system safety.
The pressure voltage of power capacitor should be not less than 1.1~1.3 times of system voltage.
If Fig. 1, capacitor C1, C2, C3 are internal to be connected into angle-style and be also possible to be connected into star-like three-phase self-healing electric capacitor
Device, resistance R4, R5, R6 are Zinc-oxide piezoresistors, and resistance is very high before being connected, and are equivalent to open circuit, when motor generator operation
The high voltage of generation, which is equivalent to, to be all added in thereon.Resistance R1, R2, R3 are current-limiting resistances, are limited when R4 or R5 or R6 is connected
The electric current flowed through will not puncture R4 or R5 or R6, and motor is connected with manufacturing machine, continue under inertia support after losing voltage
Rotation, but revolving speed reduces quickly, and the high pressure of generation also quickly reduces, as long as being no more than motor or electric power electricity when highest
Container pressure resistance, system is exactly safe.When type selecting, the conducting voltage of resistance R4, R5, R6 are higher than electric motor operation voltage, are lower than
The pressure test voltage of motor capacitor.
On the ground connection binding post of mono- end Jie power capacitor of resistance R4, R5, R6, then the connecing power capacitor with conducting wire
Ground binding post is connected with earthed system.
As shown in Fig. 2, compensator to be mounted on to the primary side of transformer, when power transformer loaded-up, have idle
Compensation equipment compensates automatically, and when the load of transformer secondary is not run, transformer is all idle running, idle running
When, reactive-load compensation equipment is not throw capacitor, since power transformer winding is inductive element, it is also desirable to be compensated certain idle
Power, our energy-saving case can play the effect of required reactive power when compensation power transformer zero load.
Claims (8)
1. a kind of energy-saving circuit, it is characterised in that: including compensator, compensator connects with the connecting terminal that need to compensate equipment
It connects, the compensator is also connect with earthed circuit.
2. energy-saving circuit as described in claim 1, it is characterised in that: the compensator be connected into the connection of triangle shape or
Three capacitors of star-like connection.
3. energy-saving circuit as claimed in claim 2, it is characterised in that: three capacitors of triangle connection are interconnected
One end is common end, and one end that three capacitors of star-like connection are not connected is common end, and common end is connect with that need to compensate equipment.
4. energy-saving circuit as described in claim 1, it is characterised in that: the earthed circuit include three current-limiting resistances and
Three varistors, three current-limiting resistance one end are connect with the common end of compensator respectively, and the other end of resistance is respectively with three
A varistor connection, the other end ground connection of varistor.
5. energy-saving circuit as described in claim 1, it is characterised in that: it is described need to compensate equipment for it is internal with coil or
The equipment of winding.
6. energy-saving circuit as described in claim 1, it is characterised in that: any one capacitor of the compensation capacitor is also
It is parallel with indicator light.
7. energy-saving circuit as described in claim 1, it is characterised in that: the compensator is mounted in cabinet, and cabinet is just
Closely it is mounted on the wall or cylinder that need to be compensated near equipment.
8. energy-saving circuit as claimed in claim 2, it is characterised in that: the pressure voltage of the capacitor is system voltage
1.1~1.3 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910684111.1A CN110380428A (en) | 2019-07-26 | 2019-07-26 | A kind of energy-saving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910684111.1A CN110380428A (en) | 2019-07-26 | 2019-07-26 | A kind of energy-saving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110380428A true CN110380428A (en) | 2019-10-25 |
Family
ID=68256568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910684111.1A Pending CN110380428A (en) | 2019-07-26 | 2019-07-26 | A kind of energy-saving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110380428A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972903A (en) * | 2014-04-21 | 2014-08-06 | 广西鼎轩科技有限公司 | Reactive in-place intelligent compensation device for three-phase asynchronous motor |
| CN210838959U (en) * | 2019-07-26 | 2020-06-23 | 六盘水金星机电设备有限公司 | Energy-saving and consumption-reducing circuit |
-
2019
- 2019-07-26 CN CN201910684111.1A patent/CN110380428A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972903A (en) * | 2014-04-21 | 2014-08-06 | 广西鼎轩科技有限公司 | Reactive in-place intelligent compensation device for three-phase asynchronous motor |
| CN210838959U (en) * | 2019-07-26 | 2020-06-23 | 六盘水金星机电设备有限公司 | Energy-saving and consumption-reducing circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109709425B (en) | System and method for testing short circuit bearing capacity of distribution transformer | |
| CN202600057U (en) | Enablement integrated tester for high-capacity electrolytic capacitor | |
| CN102680861A (en) | System and method for testing short circuit withstanding capability of transformer or electric reactor | |
| CN109633323B (en) | Adjustable reactor load test system | |
| CN107884645A (en) | Based on voltage ratio compared with power capacitor method for monitoring operation states | |
| CN201681138U (en) | Lightweight type generator power-frequency alternating-current withstand voltage tester | |
| CN107785884A (en) | A kind of more level active compensation devices of three-phase four-arm and control method | |
| CN107783010A (en) | A kind of more level active compensation devices of front-end power and control method | |
| CN103344853A (en) | Method for judging faults of parallel capacitors by means of natural vibration frequency | |
| CN103616581B (en) | The method of without disconnecting power lead test reactive power compensator | |
| CN110380428A (en) | A kind of energy-saving circuit | |
| CN210838959U (en) | Energy-saving and consumption-reducing circuit | |
| CN107785915A (en) | A kind of more level active compensation devices of front-end power and control method | |
| CN206686107U (en) | Startup of high-voltage motor compensates equipment | |
| CN112485727B (en) | Device and method for testing burst short circuit of transformer by utilizing series resonance compensation method | |
| CN106291295B (en) | Chain-end withstand voltage test method for chained STATCOM converter chain | |
| CN114089018A (en) | Method for testing faults of electromagnetic units of capacitor voltage transformer | |
| CN204244087U (en) | A kind of motor test electric supply installation with transformer and filter | |
| CN104201681A (en) | Power grid filtering method for harmonic waves generated in intermediate frequency furnace of iron and steel plant | |
| KR200383034Y1 (en) | Automatic power factor correction apparatus | |
| CN205643550U (en) | Lightning arrester tester | |
| CN107785914A (en) | A kind of more level active compensation devices of front-end power and control method | |
| CN106300346B (en) | A kind of frequency converter maintenance power supply device with protection | |
| CN201828641U (en) | Portable and integral alternating-current/direct-current tester for high-voltage motor | |
| CN203056584U (en) | Filter compensation energy-saving electric cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |