CN104377707A - Novel power grid reactive compensation device - Google Patents
Novel power grid reactive compensation device Download PDFInfo
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- CN104377707A CN104377707A CN201410539183.4A CN201410539183A CN104377707A CN 104377707 A CN104377707 A CN 104377707A CN 201410539183 A CN201410539183 A CN 201410539183A CN 104377707 A CN104377707 A CN 104377707A
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- controller
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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
- H02J3/1828—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepwise control, the possibility of switching in or out the entire compensating arrangement not being considered as stepwise control
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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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 power grid reactive compensation device. The novel power grid reactive compensation device comprises a sensor unit, an acquisition and transmission controller, a dynamic power factor compensating controller, a power capacitor unit and a silicon-controlled switch unit, wherein the sensor unit and the dynamic power factor compensating controller are connected to the input end of the acquisition and transmission controller, the dynamic power factor compensating controller is connected to the output end of the acquisition and transmission controller, and the power capacitor unit and the silicon-controlled switch unit are connected to the output end of the dynamic power factor compensating controller. According to the novel power grid reactive compensation device, oscillation is avoided, the compensation effect is guaranteed, and the compensation precision is high.
Description
Technical field:
The present invention relates to reactive power compensator technical field, relate to a kind of reactive compensator of electrical network in particular.
Background technology:
State type capacitor box is the reactive power compensation device that low-voltage power distribution system is commonly used, and idle compensating control is its core control portions.Old-fashioned idle compensating control majority is the unique basis for estimation using cos φ as switching electric capacitor, namely the cos φ value of input threshold quantity and excision thresholding is set respectively, if measure current power factor of electric network to be less than input threshold quantity, drop into capacitor, if be greater than excision thresholding, excise capacitor.But cos φ, as unique criterion of switching electric capacitor, has a lot of weak point.Such as when the idle imbalance of three-phase, capacitance compensation cannot meet the reactive requirement of each phase respectively; When small area analysis (load is lighter), easily occurring the situations such as capacitor oscillation switching, there is not high, the easy vibration switching of precision and the phenomenon such as capacitor box capacitive branch under Harmonic Conditions is fragile in existing reactive power compensator.Therefore, improved for prior art Problems existing.
Summary of the invention:
Object of the present invention is exactly the deficiency for prior art, and provides a kind of novel power grid reactive power compensator, and it can not produce oscillatory occurences, can take into account compensation effect again, and compensation precision is high.
Technology solution of the present invention is as follows:
A kind of novel power grid reactive power compensator, comprise sensor unit, collect and transmit controller, dynamic power factor compensation controller, power capacitor unit, reverse-blocking tetrode thyristor unit, the input of described collect and transmit controller is connected with sensor unit and dynamic power factor compensation controller, collect and transmit controller output end is connected with dynamic power factor compensation controller, the output of described dynamic power factor compensation controller is connected with power capacitor unit and reverse-blocking tetrode thyristor unit, wherein, described sensor unit is by the electric current of electrical network, voltage, temperature, the parameters such as power become the signal that collect and transmit controller can identify, send described collect and transmit controller to, after collect and transmit controller receives the signal of described sensor unit, received signal and the desired value be preset in collect and transmit controller are compared, and the result is relatively sent to dynamic power factor compensation controller, dynamic power factor compensation controller judges switching state and the switching number of poles of power capacitor unit and reverse-blocking tetrode thyristor unit according to the phase difference of line voltage and electric current.
Preferred as technique scheme, the capacitor in described power capacitor unit adopts thyristor switchable capacitor TSC, and described TSC utilizes in circuit access in parallel or excision electric capacity to realize system reactive power balance.
Preferred as technique scheme, the workflow of described TSC is, first the electric parameter such as voltage, electric current of electrical network is sampled, then the electric parameters such as described voltage, electric current, reactive power are carried out to analytical calculation and judge capacitor switching according to control strategy, the respective change amount that the parameters of place electrical network after switching capacitance occurs is fed 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, the operating state of dynamic power factor compensation controller and relevant parameter can be transferred to terminal computer by transmission medium by described collect and transmit controller, reach the object that overall network reactive power is balanced compensated.
Beneficial effect of the present invention is: send the electric current of electrical network, voltage, temperature, the isoparametric information of power to described collect and transmit controller by sensor unit, after collect and transmit controller receives, received information and the desired value be preset in collect and transmit controller are compared, and the result is relatively sent to dynamic power factor compensation controller, dynamic power factor compensation controller judges switching state and the switching number of poles of power capacitor unit and reverse-blocking tetrode thyristor unit according to the phase difference of line voltage and electric current.
The present invention according to the every phase of electrical network the reactive capability that lacks determine that this phase drops into electric capacity quantity, have more than needed according to electrical network and idlely excise electric capacity.Be in operation and can ensure that line system is stablized, dead-beat phenomenon occurs, can take into account compensation effect again, be that effect performs to the best by compensation arrangement.
Accompanying drawing illustrates:
Fig. 1 is 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, collect and transmit controller; 30, dynamic power factor compensation controller; 40, power capacitor unit; 50, reverse-blocking tetrode thyristor unit.
Embodiment:
Embodiment: by particular specific embodiment, embodiments of the present invention are described below, those skilled in the art can understand other advantages of the present invention and effect easily by content disclosed in the present specification.
As shown in Figure 1, a kind of novel power grid reactive power compensator, comprise sensor unit 10, collect and transmit controller 20, dynamic power factor compensation controller 30, power capacitor unit 40, reverse-blocking tetrode thyristor unit 50, the input of described collect and transmit controller 20 is connected with sensor unit 10 and dynamic power factor compensation controller 30, collect and transmit controller 20 output is connected with dynamic power factor compensation controller 30, and the output of described dynamic power factor compensation controller 30 is connected with power capacitor unit 40 and reverse-blocking tetrode thyristor unit 50.The parameters such as the electric current of electrical network, voltage, temperature, power are become the signal that collect and transmit controller 20 can identify by described sensor unit 10, be generally 0 ~ 5VDC input, so that collect and transmit controller 20 is analyzed it, is calculated, according to analysis result, send corresponding control information.Collect and transmit controller 20 is the main control computers be loaded in transformer platform area, it can gather 64 tunnel analog quantity or digital quantities simultaneously, carry out the operation such as electric quantity metering, long-range confession/power failure control, stealing warning, can also match with dynamic power factor compensation controller 30 simultaneously, the operating state of dynamic power factor compensation controller 30 and relevant parameter are transferred to terminal computer by transmission medium, reach the object that overall network reactive power is balanced compensated.Dynamic power factor compensation controller 30 judges switching state and the switching number of poles of power capacitor unit 40 and reverse-blocking tetrode thyristor unit 50 according to the phase difference of line voltage and electric current, reaches the object of change by changing switching number of poles and changing reactive current size.Power capacitor unit 40 and reverse-blocking tetrode thyristor unit 50 match with dynamic power factor compensation controller 30, complete a kind of attachment component of dynamic power factor compensation, the control information that described power capacitor unit 40 and reverse-blocking tetrode thyristor unit 50 can send according to dynamic power factor compensation controller 30 completes relevant switching action.
Capacitor in described power capacitor unit 40 adopts thyristor switchable capacitor TSC, and described TSC utilizes in circuit access in parallel or excision electric capacity to realize system reactive power balance.As shown in Figure 2, the workflow of described TSC is, first the electric parameter such as voltage, electric current of electrical network is sampled, then the electric parameters such as described voltage, electric current, reactive power are carried out to analytical calculation and judge capacitor switching according to control strategy, the respective change amount that the parameters of place electrical network after switching capacitance occurs is fed back 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, and Fig. 3 is the structure chart of TSC.
As shown in Figure 4, the building-out capacitor in the present embodiment adopts mends point mode of connection that benefit combines altogether.Mend altogether: namely three-phase capacitor realizes the identical compensation rate of synchronization to ABC three-phase, is made up of three electric capacity, compensate AB, AC, BC two-phase in three-phase respectively.Divide and mend: be i.e. single-phase electricity container, to wherein any phase realization compensation in ABC three-phase, when object is to make up three-phase imbalance, as certain phase needs the idle amount compensated to be greater than other two phase times, to the separate compensation that this carries out mutually, or certain two-phase needs the idle amount compensated to be greater than a remaining phase time, to the compensation respectively of this two-phase.
In the circuit diagram of TSC, the control of idle compensating control exports and has KZl ~ KZ8 totally 8 groups, the control section of KZl-KZ5 is only indicated in Fig. 4, it controls arrangement is that KZl controls to mend 1 altogether, KZ2 controls to mend 2 altogether, KZ3 ~ KZ5 controls three capacitors of point benefit 1 respectively, KZ6 ~ KZ8 controls point benefit 2 (not shown) respectively, but is same as three capacitors of KZ3 ~ KZ5.
Two anti-parallel thyristors in Fig. 4 are actual has been exactly the on-off action being connected to the grid by capacitor or disconnecting from electrical network.In practical engineering application, capacitor is generally divided into several groups by us, and this way can make thyristor switchable capacitor become the adjustable dynamic reactive power compensation equipment of classification, as shown in Figure 4, the right side is single-phase three group capacitors, and often group can by thyristor control switching for it.Like this, these capacitors of switching can be carried out according to the reactive requirement of electrical network, if the progression dropping into electric capacity is got more refinement, so will more close to step-less adjustment.
Operation principle: described sensor unit 10 is by the electric current of electrical network, voltage, temperature, the parameters such as power become the signal that collect and transmit controller 20 can identify, send described collect and transmit controller 20 to, after collect and transmit controller 20 receives the signal of described sensor unit 10, received signal and the desired value be preset in collect and transmit controller 20 are compared, and comparison information is sent to dynamic power factor compensation controller 30, dynamic power factor compensation controller 30 judges switching state and the switching number of poles of power capacitor unit 40 and reverse-blocking tetrode thyristor unit 50 according to the phase difference of line voltage and electric current.
Described embodiment in order to illustrative the present invention, but not for limiting the present invention.Any those skilled in the art all without prejudice under spirit of the present invention and category, can modify to described embodiment, therefore the scope of the present invention, should listed by claim of the present invention.
Claims (5)
1. a novel power grid reactive power compensator, it is characterized in that: comprise sensor unit (10), collect and transmit controller (20), dynamic power factor compensation controller (30), power capacitor unit (40), reverse-blocking tetrode thyristor unit (50), the input of described collect and transmit controller (20) is connected with sensor unit (10) and dynamic power factor compensation controller (30), the output of collect and transmit controller (20) is connected with dynamic power factor compensation controller (30), the output of described dynamic power factor compensation controller (30) is connected with power capacitor unit (40) and reverse-blocking tetrode thyristor unit (50), wherein, described sensor unit (10) is by the electric current of electrical network, voltage, temperature, the parameters such as power become the signal that collect and transmit controller (20) can identify, send described collect and transmit controller (20) to, after collect and transmit controller (20) receives the signal of described sensor unit (10), received signal and the desired value be preset in collect and transmit controller (20) are compared, and the result is relatively sent to dynamic power factor compensation controller (30), dynamic power factor compensation controller (30) judges switching state and the switching number of poles of power capacitor unit (40) and reverse-blocking tetrode thyristor unit (50) according to the phase difference of line voltage and electric current.
2. a kind of novel power grid reactive power compensator according to claim 1, it is characterized in that: the capacitor in described power capacitor unit (40) adopts thyristor switchable capacitor TSC, described TSC utilizes in circuit access in parallel or excision electric capacity to realize system reactive power balance.
3. a kind of novel power grid reactive power compensator according to claim 2, it is characterized in that: the workflow of described TSC is, first the electric parameter such as voltage, electric current of electrical network is sampled, then the electric parameters such as described voltage, electric current, reactive power are carried out to analytical calculation and judge capacitor switching according to control strategy, the respective change amount that the parameters of place electrical network after switching capacitance occurs is fed back in the sampling of the electric parameter such as voltage, electric current.
4. a kind of novel power grid reactive power compensator according to claim 2, is characterized in that: the dynamic response time of described TSC is about 0.01-0.02s.
5. a kind of novel power grid reactive power compensator according to claim 1, it is characterized in that: the operating state of dynamic power factor compensation controller (30) and relevant parameter can be transferred to terminal computer by transmission medium by described collect and transmit controller (20), reach the object that overall network reactive power is balanced compensated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410539183.4A CN104377707A (en) | 2014-10-14 | 2014-10-14 | Novel power grid reactive compensation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410539183.4A CN104377707A (en) | 2014-10-14 | 2014-10-14 | Novel power grid reactive compensation device |
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| CN104377707A true CN104377707A (en) | 2015-02-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353792A (en) * | 2015-12-07 | 2016-02-24 | 安徽巨森电器有限公司 | Reactive compensation device having capacitor temperature detection and protection functions |
| CN105515015A (en) * | 2016-01-27 | 2016-04-20 | 蚌埠市徽泰电气自动化有限公司 | Low-voltage circuit dynamic reactive power compensation device and low-voltage circuit reactive power compensation method |
| CN105932692A (en) * | 2016-05-30 | 2016-09-07 | 鹿寨县众盛商贸有限公司 | Novel reactive power compensation device for power distribution network |
| CN110071511A (en) * | 2019-05-09 | 2019-07-30 | 浙江朗松智能电力设备有限公司 | A kind of reactive compensation controlling device and capacitor switching method |
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| JP2011211803A (en) * | 2010-03-29 | 2011-10-20 | Mitsubishi Electric Corp | Control device for power system stabilization device |
| CN102299520A (en) * | 2011-09-02 | 2011-12-28 | 北京新能汇智微电网技术有限公司 | Reactive power compensation method and system for micro power grid |
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| JP2011211803A (en) * | 2010-03-29 | 2011-10-20 | Mitsubishi Electric Corp | Control device for power system stabilization device |
| CN102299520A (en) * | 2011-09-02 | 2011-12-28 | 北京新能汇智微电网技术有限公司 | Reactive power compensation method and system for micro power grid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353792A (en) * | 2015-12-07 | 2016-02-24 | 安徽巨森电器有限公司 | Reactive compensation device having capacitor temperature detection and protection functions |
| CN105515015A (en) * | 2016-01-27 | 2016-04-20 | 蚌埠市徽泰电气自动化有限公司 | Low-voltage circuit dynamic reactive power compensation device and low-voltage circuit reactive power compensation method |
| CN105932692A (en) * | 2016-05-30 | 2016-09-07 | 鹿寨县众盛商贸有限公司 | Novel reactive power compensation device for power distribution network |
| CN110071511A (en) * | 2019-05-09 | 2019-07-30 | 浙江朗松智能电力设备有限公司 | A kind of reactive compensation controlling device and capacitor switching method |
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Application publication date: 20150225 |
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