CN107453373A - A kind of Non Power Compensation Process - Google Patents
A kind of Non Power Compensation Process Download PDFInfo
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- CN107453373A CN107453373A CN201710814976.6A CN201710814976A CN107453373A CN 107453373 A CN107453373 A CN 107453373A CN 201710814976 A CN201710814976 A CN 201710814976A CN 107453373 A CN107453373 A CN 107453373A
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- reactive power
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000010276 construction Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
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Classifications
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- 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
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
A kind of Non Power Compensation Process provided by the invention, including：Reactive power compensator is set respectively in multiple load ends, the reactive power compensator includes voltage measuring apparatus, control device and reactive power compensation device；Wherein, voltage measuring apparatus is used to measure load terminal voltage change direction, reactive power compensation device is used for compensating power, the voltage change signal of control device receiving voltage measurement apparatus, calculates compensation policy, outputs control signals to reactive power compensation device；Control device opens reactive power compensation device to load end compensating power, voltage measuring apparatus measures load terminal voltage change direction and exported to control device simultaneously, and control device is according to voltage change direction calculating compensation policy and outputs control signals to reactive power compensation device.This method is convenient and swift, and construction cost reduces, and configuration is more convenient, flexible.
Description
Technical field
The invention belongs to power domain, more particularly to a kind of Non Power Compensation Process.
Background technology
Electrical power is divided into active-power P, reactive power Q and apparent energy S.Wherein, active-power P=UIcos φ, represent
The power unit of actual absorption is represented with W；Reactive power Q=UIsin φ, this energy do not consume during reciprocal exchange
Fall unit to be represented with Var；Apparent energy S S=UI units represent with VA, apparent energy and the number of active power and reactive power
Relation：S2=P2+Q2；Wherein, φ：Represent voltage U and electric current I phase angle difference.Actually equipment consumption is exactly active power
And reactive power, and the data of electric energy meter metering only calculate active energy.
Purely capacitive and pure inductance electric current I and voltage U phase angle difference is all 90 °, and one 90 ° in advance, one lags 90 °, institute
With purely capacitive and P=UIcos φ=UIcos of pure inductance (90 °)=0W；Also just say, purely capacitive and pure inductance has in circuit
Work(power is 0, does not consume active energy, the reason for being referred to as energy-storage travelling wave tube here it is them.
Power factor PF=P/S, is an important technology economic indicator of electricity supplying and using system, and electrical equipment is active in consumption
While power, substantial amounts of reactive power is also needed to be sent to load by power supply, power factor reflection is that electrical equipment is consuming one
Required reactive power while fixed active power.Reactive power consumption is very big in power network, about 50% reactive power
Consumption is on defeated, change, controller switching equipment, and 50% reactive power consumption is in power consumer.In order to reduce reactive power consumption and by
This and caused by electric network active be lost, must just reduce flowing of the reactive power in power network, that is, improve the power of network load
Factor, so as to reach saving electric energy, low-loss purpose drops.
Although reactive energy not charging, reactive power is high, and PF will be small, and Utilities Electric Co. can impose a fine.In addition, PF is got over
It is small, consume equal active power, the absolute value of the electric current in circuit will increase, and bring line loss to increase, and it is old to accelerate circuit
The problems such as change.Reactive power is that some equipment have to consumption, and this has no idea to eliminate, but can provide nothing nearby
Work(power, flowing of the reactive power in power network is reduced, here it is so-called reactive power compensation.
The content of the invention
Technical problem：In order to solve the defects of prior art, the invention provides a kind of Non Power Compensation Process.
Technical scheme：A kind of Non Power Compensation Process provided by the invention, including：
(1) reactive power compensator is set respectively in multiple load ends, the reactive power compensator includes voltage measurement
Device, control device and reactive power compensation device；Wherein, voltage measuring apparatus is used to measure load terminal voltage change direction,
Reactive power compensation device is used for compensating power, the voltage change signal of control device receiving voltage measurement apparatus, calculates
Compensation policy, output control signals to reactive power compensation device；
(2) control device opens reactive power compensation device to load end compensating power, while voltage measuring apparatus
Measure load terminal voltage change direction simultaneously export to control device, control device according to voltage change direction calculating compensation policy simultaneously
Output control signals to reactive power compensation device：When load terminal voltage rises, show that compensation policy is correct, continue to increase and mend
Repay dynamics；When load terminal voltage declines, show compensation policy mistake, reduce compensation dynamics or compensate round about；Constantly
Compensation policy is adjusted, until load terminal voltage maximum, you can.
Present invention also offers a kind of reactive power compensator, including voltage measuring apparatus, control device, reactive power to mend
Repay device；The voltage measuring apparatus is connected with control device, and output voltage variable signal is to control device；The control dress
Put and be connected with reactive power compensator, and send a control signal to reactive power compensator.
Beneficial effect：Non Power Compensation Process provided by the invention determines to mend by detecting the change of load terminal voltage
Strategy is repaid, so as to eliminate the use of current transformer, all is it also avoid and is brought a series of with increasing current transformer
Problem, quick and easy for installation, construction cost reduces, and configuration is more convenient, flexible.
Brief description of the drawings
Fig. 1 is the method schematic diagram of existing reactive power compensation.
Fig. 2 is active power, reactive power and the apparent energy graph of a relation of load.
Fig. 3 is the method schematic diagram of reactive power compensation of the present invention.
Embodiment
The present invention is further illustrated below.
Comparative example
In actual applications, in order to realize reactive power compensation, the phase angle difference of voltage and current is necessarily first measured, then
According to this phase angle difference, switching it is appropriate inductively or capacitively reach the purpose of compensating power nearby, that is, so that
PF after compensation is as far as possible close to 1.
The phase angle difference of voltage and current is measured it is necessary to be gone here and there in major loop into current transformer, is on the one hand processed to equipment
Make troubles, it is also high for space requirement in equipment；On the other hand, this method can only measured point of compensation current transformer
The reactive power on road.
Specifically, reactive power compensator summation current transformer is configured in load end, there can be two kinds of collocation methods：
(1) reactive power compensator summation current transformer is respectively configured in load 1, load 2, load 3：
Advantage is：
(a) reactive power compensator closer to load it is better, therefore load 1, load 2, load 3 on be respectively configured it is idle
Power compensator compensation effect is more preferable；
(b) when a reactive power compensator breaks down, that load nearby is only influenceed, it is negative not influence other
Carry；
(c) load can dynamically increase, and increase reactive power compensator while increase loads.
Shortcoming is：Each load will install reactive power compensator, construction inconvenience；Simultaneously as electric current must be measured,
So current transformer must go here and there on corresponding circuit, once current mulual inductor malfunction, is safeguarded cumbersome and dangerous.
(2) a big reactive power compensator summation current transformer is configured after transformer：
Advantage is：Initial stage, configuration capacity settled at one go, and place does not just have to compensate again back loading nearby, for the installation of load
It is convenient.
Shortcoming is：Harm is that then influence is global once breaking down.
Embodiment 1
Reactive power compensator, including voltage measuring apparatus, control device, reactive power compensation device；The voltage is surveyed
Amount device is connected with control device, and output voltage variable signal is to control device；The control device and reactive power compensation
Device connects, and sends a control signal to reactive power compensator.
Embodiment 2
Non Power Compensation Process, theoretical foundation, see Fig. 3：
Assuming that the active power of load is AB, reactive power is BC, then apparent energy is exactly AC.
Corresponding watt current (with arc in phase), reactive current (with 90 ° of voltage phase difference), total current (actual current)
Amplitude relation ratio be also AB：BC：AC.
If BC can be compensated nearby, then the electric current transmitted on circuit will become AB by AC.Current amplitude diminishes,
Phase also with arc in phase.
It is known that transmission line is not ideal line, there is resistance, then power supply by transmission line electric energy
It is sent in loading process, the voltage of load end will reduce than the voltage of power supply, and line resistance is bigger, and electric current is bigger, declines just
It is more obvious.When line resistance is certain, it is assumed that supply voltage is constant, then the change of electric current may result in load terminal voltage
Change.
This method specific steps include：
(1) reactive power compensator is set respectively in multiple load ends, the reactive power compensator includes voltage measurement
Device, control device and reactive power compensation device；Wherein, voltage measuring apparatus is used to measure load terminal voltage change direction,
Reactive power compensation device is used for compensating power, the voltage change signal of control device receiving voltage measurement apparatus, calculates
Compensation policy, output control signals to reactive power compensation device；
(2) control device opens reactive power compensation device to load end compensating power, while voltage measuring apparatus
Measure load terminal voltage change direction simultaneously export to control device, control device according to voltage change direction calculating compensation policy simultaneously
Output control signals to reactive power compensation device：When load terminal voltage rises, show that compensation policy is correct, continue to increase and mend
Repay dynamics；When load terminal voltage declines, show compensation policy mistake, reduce compensation dynamics or compensate round about；Constantly
Compensation policy is adjusted, until load terminal voltage maximum, you can.
This method is compensated by first attempting, then is measured, and by electronically, these actions of compensation and measurement can be very
Complete in short time, caused by thinking that the change of the voltage in this very short time is due to compensation, rather than power supply
Caused by voltage change；If compensation is correct, the transmission electric current in circuit can diminish, and pressure drop caused by circuit can also diminish, from
And the voltage of load end will rise；Vice versa；
Specifically, see Fig. 3, reactive power compensator, voltage measuring apparatus and control are set respectively in three loads
Device, reactive power compensator are used for compensating power, and voltage measuring apparatus is used to measure load terminal voltage change direction；Open
Reactive power compensator is opened to load end compensating power, while measures load terminal voltage change direction；Work as load terminal voltage
During rising, show that compensation policy is correct, continue to increase compensation dynamics；When load terminal voltage declines, show compensation policy mistake,
Reduce compensation dynamics or compensate round about；Constantly adjustment compensation policy, until load terminal voltage maximum, you can.
Meanwhile the reactive power compensator of above three load configuration, it is mutual in fact because voltage is basically identical
Shared；Especially when load 1 is idle, because electric current almost disappears in the circuit of connection load 1, then this section of line
Road pressure drop can be ignored, now for load 1 configuration reactive power compensator measured by voltage be exactly in fact load 2 or
The voltage of load 3, then his compensation behavior will be directed to load 2 or load 3 is compensating.And traditional method, once load
Do not work, then for the reactive power compensator that it is separately configured because the electric current of measurement is 0, phase angle 0, then will not do any benefit
Repay operation, that is to say, that the idleness of equipment.And the reactive power compensation device made according to the present invention, after mounting, no matter just
Whether near load works, and reactive power compensator itself can work always.In such event, being whether there is after a transformer
Reactive power compensator device is just into the role that capacity supports mutually, function backs up mutually.Therefore, allocation plan can be flexibly more
Become；Backed up mutually it is of particular importance that they support each other, security and economy are all greatly improved.
Specifically,
Supply voltage 220V, 0.5 ohm, inductive load PF=0.8, load current 28.41A of transmission line impedance, with electricity
The phase angle of pressure is φ (cos φ=0.8), wherein active stream is 22.73A, reactive current 17.04A.
When not taking indemnifying measure, load terminal voltage is 220V -28.41A*0.5 Ω=205.8V；Now if
Controller, which is taken, cuts an inductance in parallel into circuit, then the reactive current on circuit will increase, for example become 18A, then
Load total current is changed into 29A, and now load terminal voltage is 220V -29A*0.5 Ω=205.5V, is reduced, and illustrates tactful mistake
By mistake.Then it is changed to cut an electric capacity and is parallel in circuit, then the reactive current on circuit will be reduced, for example become 16A, then
Load total current is changed into 27.8A, and now load terminal voltage is 220V -27.8A*0.5 Ω=206.1V, adds, illustrates strategy
Correctly, the capacitance that increase is cut up is continued, reactive current will continue to reduce on circuit, for example to 0A, then load total electricity
Rheology is 22.73A, and now load terminal voltage is 220V -22.73A*0.5 Ω=208.6V.If continuing to increase capacitance,
Then reactive current will increase (direction becomes advanced 90 ° for 90 ° by lagging voltage) on circuit, then load terminal voltage will decline.
It was found from this process, 208.6V is the maximum voltage value in this period, it should takes the compensation that load voltage values are 208.6V
Strategy.
Claims (2)
- A kind of 1. Non Power Compensation Process, it is characterised in that：Including：(1) reactive power compensator is set respectively in multiple load ends, the reactive power compensator include voltage measuring apparatus, Control device and reactive power compensation device；Wherein, voltage measuring apparatus is used to measure load terminal voltage change direction, idle work( Rate compensation device is used for compensating power, the voltage change signal of control device receiving voltage measurement apparatus, calculates compensation plan Slightly, reactive power compensation device is output control signals to；(2) control device opens reactive power compensation device to load end compensating power, while voltage measuring apparatus measures Load terminal voltage change direction is simultaneously exported to control device, and control device is according to voltage change direction calculating compensation policy and exports Control signal is to reactive power compensation device：When load terminal voltage rises, show that compensation policy is correct, continue to increase balancing force Degree；When load terminal voltage declines, show compensation policy mistake, reduce compensation dynamics or compensate round about；Constantly adjustment Compensation policy, until load terminal voltage maximum, you can.
- A kind of 2. reactive power compensator, it is characterised in that：Including voltage measuring apparatus, control device, reactive power compensation dress Put；The voltage measuring apparatus is connected with control device, and output voltage variable signal is to control device；The control device with Reactive power compensator connects, and sends a control signal to reactive power compensator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710814976.6A CN107453373B (en) | 2017-09-12 | 2017-09-12 | Reactive power compensation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710814976.6A CN107453373B (en) | 2017-09-12 | 2017-09-12 | Reactive power compensation method |
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| CN107453373A true CN107453373A (en) | 2017-12-08 |
| CN107453373B CN107453373B (en) | 2023-12-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599179A (en) * | 2018-06-15 | 2018-09-28 | 东北农业大学 | A kind of Non Power Compensation Process |
| CN109904859A (en) * | 2019-04-20 | 2019-06-18 | 江苏驭创高铁节能科技有限公司 | A kind of four-quadrant frequency converter realization line drop compensation control method |
| CN113346511A (en) * | 2021-06-11 | 2021-09-03 | 南京中探海洋物联网有限公司 | Correction method for reactive power compensation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2278298Y (en) * | 1996-10-08 | 1998-04-08 | 邹瑞云 | Automatic compensator for lead end transforming |
| CN201805227U (en) * | 2010-06-04 | 2011-04-20 | 东莞市展圳节能环保设备有限公司 | Power energy-saving device |
| CN202309087U (en) * | 2011-11-02 | 2012-07-04 | 福建阳谷智能技术有限公司 | Single-phase voltage adjusting device with core controller and combination switch |
-
2017
- 2017-09-12 CN CN201710814976.6A patent/CN107453373B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2278298Y (en) * | 1996-10-08 | 1998-04-08 | 邹瑞云 | Automatic compensator for lead end transforming |
| CN201805227U (en) * | 2010-06-04 | 2011-04-20 | 东莞市展圳节能环保设备有限公司 | Power energy-saving device |
| CN202309087U (en) * | 2011-11-02 | 2012-07-04 | 福建阳谷智能技术有限公司 | Single-phase voltage adjusting device with core controller and combination switch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599179A (en) * | 2018-06-15 | 2018-09-28 | 东北农业大学 | A kind of Non Power Compensation Process |
| CN109904859A (en) * | 2019-04-20 | 2019-06-18 | 江苏驭创高铁节能科技有限公司 | A kind of four-quadrant frequency converter realization line drop compensation control method |
| CN113346511A (en) * | 2021-06-11 | 2021-09-03 | 南京中探海洋物联网有限公司 | Correction method for reactive power compensation |
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