CN105932692A - Novel reactive power compensation device for power distribution network - Google Patents
Novel reactive power compensation device for power distribution network Download PDFInfo
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- CN105932692A CN105932692A CN201610372647.6A CN201610372647A CN105932692A CN 105932692 A CN105932692 A CN 105932692A CN 201610372647 A CN201610372647 A CN 201610372647A CN 105932692 A CN105932692 A CN 105932692A
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- power
- unit
- power factor
- factor compensation
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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
-
- 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
- H02J3/002—Flicker reduction, e.g. compensation of flicker introduced by non-linear load
-
- 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)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a novel reactive power compensation device for a power distribution network. The novel reactive power compensation device comprises a sensor unit, a collection and transmission controller, a dynamic power factor compensation controller, a power capacitor unit and a silicon-controlled switch unit, wherein an input end of the collection and transmission controller is connected with the sensor unit and the dynamic power factor compensation controller, an output end of the collection and transmission controller is connected with the dynamic power factor compensation controller, and the output end of the dynamic power factor compensation controller is connected with the power capacitor unit and the silicon-controlled switch unit. The novel reactive power compensation device disclosed by the invention generates no oscillation phenomenon and can take the compensation effect into account, and the compensation precision is high.
Description
Technical field
The present invention relates to reactive power compensator technical field, a kind of idle benefit of power distribution network
Repay device.
Background technology
State type capacitor box is the reactive power compensation device that low-voltage power distribution system is conventional, reactive-load compensation
Controller is its core control portions.Old-fashioned idle compensating control majority is using cos φ as switching electricity
Unique basis for estimation of power electric capacity, sets input threshold quantity and the cos φ value of excision thresholding, the most respectively if surveyed
Measure current Power Factor of Distribution Network and then put into capacitor less than input threshold quantity, if more than excision thresholding,
Excision capacitor.But cos φ is as unique criterion of switching electric capacitor, has a lot of weak point.Ratio
As when three-phase idle uneven time, capacitance compensation cannot meet the reactive requirement of each phase respectively；At small area analysis
Time (load is lighter), the situations such as capacitor oscillation switching easily occur, there is precision in existing reactive power compensator
The phenomenons such as vibration switching the highest, easy and capacitor box capacitive branch under Harmonic Conditions is fragile.Therefore,
The problem existed for prior art is improved.
Summary of the invention
The purpose of the present invention is aiming at the deficiency of prior art, and provides a kind of idle benefit of new distribution net
Repaying device, it will not produce oscillatory occurences, can take into account again compensation effect, and compensation precision is high.
The technology solution of the present invention is as follows:
A kind of new distribution net reactive power compensator, including sensor unit, collection transmission control unit (TCU), moves
State power factor compensating controller, power capacitor unit, reverse-blocking tetrode thyristor unit, described collection is transmitted
The input of controller connects sensor unit and dynamic power factor compensation controller, gathers transmission control
Device outfan processed connects dynamic power factor compensation controller, described dynamic power factor compensation controller
Outfan connect have power capacitor unit and reverse-blocking tetrode thyristor unit, wherein, described sensor unit
The parameters such as the electric current of power distribution network, voltage, temperature, power are become and gathers what transmission control unit (TCU) can identify
Signal, sends described collection transmission control unit (TCU) to, gathers transmission control unit (TCU) and receives described sensor unit
Signal after, received signal is compared with being preset in the desired value gathered in transmission control unit (TCU),
And the result after comparing sends to dynamic power factor compensation controller, dynamic power factor compensation controls
Device judges power capacitor unit and reverse-blocking tetrode thyristor unit according to the phase contrast of distribution network voltage Yu electric current
Switching state and switching number of poles.Described dynamic power factor compensation controller is by main circuit and control circuit
Composition, main circuit includes that being pre-charged double clamp circuit, main switch automatically and connection delta compensates condenser network,
Dash current when energy restraining device puts into and disconnects and overvoltage；Control circuit includes voltage zero-crossing signal
Circuit, reactive current sample circuit, pico computer, thyristor gating circuit, switching manipulation linkage button
With capacitance group state configuration switch.
Preferred as technique scheme, the capacitor in described power capacitor unit uses brilliant lock
Pipe switched capacitor TSC, described TSC are to utilize to access or excise electric capacity the most in parallel and realize to be
System reactive power equilibrium.
Preferred as technique scheme, the workflow of described TSC is, first to power distribution network
The electric parameter such as voltage, electric current is sampled, and then carries out the electric parameters such as described voltage, electric current, reactive power
Analytical calculation also judges capacitor switching according to control strategy, by each of place power distribution network after switching capacitance
The respective change amount that parameter occurs feeds back in the sampling of the electric parameter such as voltage, electric current.
Preferred as technique scheme, the dynamic response time of described TSC is about 0.01-0.02s.
Preferred as technique scheme, described collection transmission control unit (TCU) can be by dynamic power factor
The duty of compensating controller and relevant parameter to terminal computer, reach complete by transmission media transmission
The purpose that office's network reactive power is balanced compensated.
The beneficial effects of the present invention is: by sensor unit by the electric current of power distribution network, voltage, temperature,
The isoparametric information of power sends described collection transmission control unit (TCU) to, after collection transmission control unit (TCU) receives,
Received information is compared with being preset in the desired value gathered in transmission control unit (TCU), and will compare
After result send to dynamic power factor compensation controller, dynamic power factor compensation controller is according to joining
The phase contrast of line voltage and electric current judges the switching shape of power capacitor unit and reverse-blocking tetrode thyristor unit
State and switching number of poles.
According to the reactive capability that the every phase of power distribution network is lacked, the present invention determines that this phase puts into electric capacity quantity, according to
Power distribution network is had more than needed and idle is excised electric capacity.It is in operation and both can guarantee that line system is stable, dead-beat phenomenon
Occur, compensation effect can be taken into account again, be that effect performs to most preferably by compensation device.
Accompanying drawing explanation
In order to be illustrated more clearly that technical scheme, below will be to embodiment or description of the prior art
The accompanying drawing used required in is briefly described, it should be apparent that, the accompanying drawing in describing below is only
Some embodiments of the present invention, for those of ordinary skill in the art, are not paying creative work
On the premise of, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structured flowchart of the present invention；
Fig. 2 is the workflow diagram of TSC in the present invention；
Fig. 3 is the structure chart of TSC in the present invention；
Fig. 4 is the circuit diagram of TSC in the present invention.
In figure, 10-sensor unit；20-gathers transmission control unit (TCU)；30-dynamic power factor compensation controls
Device；40-power capacitor unit；50-reverse-blocking tetrode thyristor unit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained on the premise of going out creative work, broadly falls into the scope of protection of the invention.
As shown in Figure 1, a kind of new distribution net reactive power compensator, including sensor unit 10, gather biography
Defeated controller 20, dynamic power factor compensation controller 30, power capacitor unit 40, reverse-blocking tetrode thyristor
Unit 50, the input of described collection transmission control unit (TCU) 20 connect have sensor unit 10 and dynamic power because of
Number compensating controller 30, gathering the connection of transmission control unit (TCU) 20 outfan has dynamic power factor compensation controller
30, the outfan of described dynamic power factor compensation controller 30 connects power capacitor unit 40 and can
Control transwitch unit 50.Described sensor unit 10 is by the electric current of power distribution network, voltage, temperature, power etc.
Parameter becomes the signal that collection transmission control unit (TCU) 20 can identify, generally 0～5VDC input, in order to adopt
It is analyzed, calculates by collection transmission control unit (TCU) 20, according to analysis result, sends corresponding control
Information processed.Gathering transmission control unit (TCU) 20 is the main control computer being loaded in transformer platform area, and it can adopt simultaneously
Collect 64 tunnel analog quantity or digital quantities, carry out electric quantity metering, remotely for/power failure control, stealing warning etc.
Operation, can also match with dynamic power factor compensation controller 30, by dynamic power factor compensation simultaneously
The duty of controller 30 and relevant parameter to terminal computer, reach the overall situation by transmission media transmission
The purpose that network reactive power is balanced compensated.Dynamic power factor compensation controller 30 according to distribution network voltage with
The phase contrast of electric current judges switching state and the throwing of power capacitor unit 40 and reverse-blocking tetrode thyristor unit 50
Cut number of poles, change reactive current size by change switching number of poles and reach the purpose changed.Electric power electricity
Container unit 40 and reverse-blocking tetrode thyristor unit 50 are to match with dynamic power factor compensation controller 30, complete
Become a kind of attachment component of dynamic power factor compensation, described power capacitor unit 40 and reverse-blocking tetrode thyristor
Unit 50 can complete, according to the control information that dynamic power factor compensation controller 30 is sent, the switching be correlated with
Action.Described dynamic power factor compensation controller (30) is made up of main circuit and control circuit, main electricity
Road includes that being pre-charged double clamp circuit, main switch automatically and connection delta compensates condenser network, can restraining device
Dash current when putting into and disconnect and overvoltage；Control circuit includes voltage zero-crossing signal circuit, idle
Current sampling circuit, pico computer, thyristor gating circuit, switching manipulation linkage button and capacitance group shape
State configuration switch.
Capacitor in described power capacitor unit 40 uses thyristor switchable capacitor TSC, described TSC
It is to utilize to access or excise electric capacity the most in parallel to realize system reactive power balance.See Fig. 2 institute
Showing, the workflow of described TSC is, first to electric parameter samplings such as the voltage of power distribution network, electric currents, so
It is analyzed electric parameters such as described voltage, electric current, reactive powers afterwards calculating and sentencing according to control strategy
Disconnected capacitor switching, feeds back to the respective change amount that the parameters of place power distribution network after switching capacitance occurs
In the sampling of the electric parameter such as voltage, electric current.The dynamic response time of described TSC is about 0.01-0.02s, Fig. 3
Structure chart for TSC.
As shown in Figure 4, the electric capacity that compensates in the present embodiment uses benefit point altogether to mend the mode of connection combined.
Mend altogether: i.e. three-phase capacitor realizes, to ABC three-phase, the compensation dosage that synchronization is identical, by three capacitance group
Become, compensate AB, AC, the BC in three-phase respectively biphase.Divide and mend: be i.e. single-phase electricity container, to ABC
When in three-phase, the most any one phase realizes compensating in order to make up three-phase imbalance, as certain phase needs
The idle amount compensated is more than other two phase times, the separate compensation carrying out this phase, or certain biphase needs
The idle amount compensated is more than a remaining phase time, the respectively compensation biphase to this.
In the circuit diagram of TSC, the control output of idle compensating control has KZl～KZ8 totally 8 groups, Fig. 4
In only indicate the control part of KZl-KZ5, it controls arrangement is that KZl controls to mend altogether 1, and KZ2 controls
Mending 2 altogether, KZ3～KZ5 controls point three capacitors of benefit 1 respectively, KZ6～KZ8 controls a point benefit respectively
2 (not shown), but it is same as three capacitors of KZ3～KZ5.
Two anti-parallel thyristor reality in Fig. 4 rise exactly and capacitor are incorporated to power distribution network or from distribution
The on-off action that net disconnects.In practical engineering application, capacitor is typically divided into several groups by us, this
Way can make thyristor switchable capacitor become the adjustable dynamic reactive power compensation equipment of classification, such as figure
Shown in 4, the right side is single-phase three group capacitors, and often group can be by thyristor control switching for it.So, may be used
Reactive requirement according to power distribution network carrys out these capacitors of switching, if getting the thinnest by the progression putting into electric capacity
Change, then step-less adjustment will be closer to.
Operation principle: the electric current of power distribution network, voltage, temperature, power etc. are joined by described sensor unit 10
Number becomes the signal that collection transmission control unit (TCU) 20 can identify, sends described collection transmission control unit (TCU) 20 to,
Gather after transmission control unit (TCU) 20 receives the signal of described sensor unit 10, by received signal with
It is preset in the desired value gathered in transmission control unit (TCU) 20 to compare, and comparison information is sent to dynamic merit
Rate factor compensation controller 30, dynamic power factor compensation controller 30 is according to distribution network voltage and electric current
Phase contrast judges switching state and the switching pole of power capacitor unit 40 and reverse-blocking tetrode thyristor unit 50
Number.
Above disclosed only presently preferred embodiments of the present invention, can not limit this with this certainly
Bright interest field, the equivalent variations made according to the claims in the present invention still belongs to the scope that the present invention is contained.
Claims (5)
1. a new distribution net reactive power compensator, it is characterised in that: include sensor unit (10),
Gather transmission control unit (TCU) (20), dynamic power factor compensation controller (30), power capacitor unit (40),
Reverse-blocking tetrode thyristor unit (50), the input of described collection transmission control unit (TCU) (20) connects sensor list
Unit (10) and dynamic power factor compensation controller (30), gather the outfan of transmission control unit (TCU) (20)
Connect and have dynamic power factor compensation controller (30), described dynamic power factor compensation controller (30)
Outfan connect have power capacitor unit (40) and reverse-blocking tetrode thyristor unit (50), wherein, described
The parameters such as the electric current of power distribution network, voltage, temperature, power are become collection transmission by sensor unit (10)
The signal that controller (20) can identify, sends described collection transmission control unit (TCU) (20) to, gathers transmission
After controller (20) receives the signal of described sensor unit (10), by received signal with
It is preset in the desired value gathered in transmission control unit (TCU) (20) to compare, and the result after comparing sends
To dynamic power factor compensation controller (30), dynamic power factor compensation controller (30) is according to distribution
Net voltage judges power capacitor unit (40) and reverse-blocking tetrode thyristor unit (50) with the phase contrast of electric current
Switching state and switching number of poles；Described dynamic power factor compensation controller (30) is by main circuit and control
Circuit processed forms, and main circuit includes that being pre-charged double clamp circuit, main switch automatically and connection delta compensates electric capacity
Circuit, dash current when energy restraining device puts into and disconnects and overvoltage；Control circuit includes voltage mistake
Zero-signal circuit, reactive current sample circuit, pico computer, thyristor gating circuit, switching manipulation connection
Dynamic button and capacitance group state configuration switch.
A kind of new distribution net reactive power compensator the most according to claim 1, it is characterised in that: institute
State the capacitor in power capacitor unit (40) and use thyristor switchable capacitor TSC, described TSC
It is to utilize to access or excise electric capacity the most in parallel to realize system reactive power balance.
A kind of new distribution net reactive power compensator the most according to claim 2, it is characterised in that: institute
The workflow stating TSC is, first to electric parameter samplings such as the voltage of power distribution network, electric currents, then to institute
State the electric parameters such as voltage, electric current, reactive power to be analyzed calculating and judging electric capacity according to control strategy
Switching, by after switching capacitance place power distribution network parameters occur respective change amount feed back to voltage,
In the sampling of the electric parameters such as electric current.
A kind of new distribution net reactive power compensator the most according to claim 2, it is characterised in that: institute
The dynamic response time stating TSC is 0.01-0.02s.
A kind of new distribution net reactive power compensator the most according to claim 1, it is characterised in that: institute
Stating collection transmission control unit (TCU) (20) can be by the duty of dynamic power factor compensation controller (30)
And relevant parameter by transmission media transmission to terminal computer, reach the overall situation network reactive power balanced compensated
Purpose.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610372647.6A CN105932692A (en) | 2016-05-30 | 2016-05-30 | Novel reactive power compensation device for power distribution network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610372647.6A CN105932692A (en) | 2016-05-30 | 2016-05-30 | Novel reactive power compensation device for power distribution network |
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| CN201610372647.6A Pending CN105932692A (en) | 2016-05-30 | 2016-05-30 | Novel reactive power compensation device for power distribution network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599187A (en) * | 2018-05-25 | 2018-09-28 | 杭州得诚电力科技股份有限公司 | A kind of combined intelligent capacitor and implementation method |
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| WO2011004050A1 (en) * | 2009-07-09 | 2011-01-13 | Universidad Politecnica De Valencia | Method for compensating for unbalance in an electric power supply and compensating device used to carry out same |
| CN203166533U (en) * | 2013-04-01 | 2013-08-28 | 四川华仪电器有限公司 | Stepless reactive power compensation device with individual phase control |
| CN104092220A (en) * | 2014-06-09 | 2014-10-08 | 安徽金捷光电科技有限公司 | Magnetically-controlled dynamic reactive power compensation device |
| CN104377707A (en) * | 2014-10-14 | 2015-02-25 | 苏州克兰兹电子科技有限公司 | Novel power grid reactive compensation device |
| CN104578095A (en) * | 2014-12-22 | 2015-04-29 | 安徽凯川电力保护设备有限公司 | Low-voltage dynamic reactive power compensation device |
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2016
- 2016-05-30 CN CN201610372647.6A patent/CN105932692A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011004050A1 (en) * | 2009-07-09 | 2011-01-13 | Universidad Politecnica De Valencia | Method for compensating for unbalance in an electric power supply and compensating device used to carry out same |
| CN203166533U (en) * | 2013-04-01 | 2013-08-28 | 四川华仪电器有限公司 | Stepless reactive power compensation device with individual phase control |
| CN104092220A (en) * | 2014-06-09 | 2014-10-08 | 安徽金捷光电科技有限公司 | Magnetically-controlled dynamic reactive power compensation device |
| CN104377707A (en) * | 2014-10-14 | 2015-02-25 | 苏州克兰兹电子科技有限公司 | Novel power grid reactive compensation device |
| CN104578095A (en) * | 2014-12-22 | 2015-04-29 | 安徽凯川电力保护设备有限公司 | Low-voltage dynamic reactive power compensation device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108599187A (en) * | 2018-05-25 | 2018-09-28 | 杭州得诚电力科技股份有限公司 | A kind of combined intelligent capacitor and implementation method |
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Application publication date: 20160907 |