CN102437580A - Reactive power capacitor compensator - Google Patents
Reactive power capacitor compensator Download PDFInfo
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- CN102437580A CN102437580A CN2011104386337A CN201110438633A CN102437580A CN 102437580 A CN102437580 A CN 102437580A CN 2011104386337 A CN2011104386337 A CN 2011104386337A CN 201110438633 A CN201110438633 A CN 201110438633A CN 102437580 A CN102437580 A CN 102437580A
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- reactive power
- thyristor
- tcr
- impedor
- filter
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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]
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Abstract
The invention relates to a reactive power capacitor compensator, which comprises a filter compensator (FC), a thyristor of a thyristor controlled reactor (TCR), an impedor and a control unit. The reactive power capacitor compensator is characterized in that: the FC filter is electrically connected with a bus connected with a load through a selector switch; and the selector switch and the thyristor of the TCR are electrically connected with the control unit. The aim of controlling reactive power is fulfilled by regulating a triggering angle of the thyristor of the TCR and controlling current flowing through the impedor. Options of a varactor are selected and switched according to the changing conditions of the reactive power of the load, and power factors of each phase are compensated.
Description
Technical field
The present invention relates to a kind of reactive power capacitive compensator.
Background technology
Reactive power compensation is significant to electric power system.Suitable reactive power compensation is carried out in electric power system, can be stablized line voltage, improve power factor, improve utilization rate of equipment and installations, reduce network active power loss ability to transmit electricity, the balance three phase power for system provides voltage, improves system's safety in operation.Especially in recent years; Along with the continuous development of modern industry and power industry, enterprise extensively adopts asynchronous motor and power transformer, and the existence of the high-power impact load of large SCR device generation; Make electric power system power because of low, voltage fluctuation strengthens.Therefore, no matter from the transmittability that improves power transmission network, reduce the wastage, improve the stability of a system, still, all need install a large amount of reactive power compensators from improving the angle of power supply quality, the development prospect of reactive power compensation device is boundless.
At present, reactive power compensation both at home and abroad technological development mainly be divided into three phases:
1. fixed capacity compensation
The fixed capacity compensation is a kind of fairly simple reactive power compensator, adopts contactor, thermal relay, reactive power compensation control device and capacitor to carry out classification, grouping switching, because it is simple in structure; Economical convenient, also occupied the bigger market share at present, still; This compensation way has its significant disadvantages, mainly contain following some: the amplification of characteristic subharmonic current easily and system's generation resonance is caused in (1); Not only endanger capacitor itself; And the electric equipment in the entail dangers to electrical network, can cause damage in the time of serious, even destroy the normal operation of electrical network; (2) increase or system breaks down when causing the net pressure drop low when system loading, the idle output of Electric capacity compensation device can reduce along with the reduction of terminal voltage on the contrary, does not reach requirement.(3) the contactor frequent switching causes contacts of contactor to ablate easily, fuse burns etc., and failure rate is higher.(4) the controller control precision is low, and adding is the fixed capacity switching, is prone to cause the benefit phenomenon, causes the moment excessive element that burns that shoves.
2. adopt the moving device of mending of SVC of thyristor
The basic principle of SVC is to adopt the Thyristor Controlled AC voltage adjusting, is also referred to as AC chopping, generally adopts phase shifting control.It is fast that the SVC compensation arrangement has response speed; Can regulate the characteristics of reactive power output continuously; Avoided the phenomenon of contactor switching ablation element, but the copper loss of SVC compensation arrangement and iron loss are all bigger, the high order harmonic component that outputs in the AC system is more; And the volume of reactor is also bigger, and it is further perfect to still need.
3.SVG basic principle
SVG is based on the notion of instantaneous reactive rate and the commutation converter that compensation principle adopts GTO to constitute.Two kinds of SVG component voltage type and current mode bridge circuits.Phase place, amplitude person through regulating bridge circuit AC side output voltage directly regulate the exchange that its ac-side current carries out reactive power.Its governing speed is faster, and adjustable range is wideer, and the idle regulating power under under-voltage is stronger, therefore has good compensation characteristic.
Summary of the invention
The purpose of this invention is to provide a kind of no throw in-of oscillation, prolong device lifetime, improve the reactive power capacitive compensator of reliability.
The objective of the invention is to realize like this; The reactive power capacitive compensator; Comprise FC filter, TCR thyristor, impedor and control unit, it is characterized in that: be electrically connected through fling-cut switch between FC filter and the bus that is connected to load, fling-cut switch is used for switching capacitive reactance device; The capacitive reactive power compensation is provided, compensates each phase power factor and harmonic, TCR thyristor control impedor is used for balance sysmte because the lagging reactive power that fluctuation produced of load.
Fling-cut switch and TCR thyristor are electrically connected with control unit, and the TCR thyristor is accepted the signal from control system, change the size of thyristor trigger angle, produce corresponding reactive power compensation electric current.
The TCR thyristor adopts valve body compacting, horizontal installation.
Power capacitor is installed natural cooling for the group posture in the FC filter.
Impedor is the hollow dry type, twin coil up and down, natural cooling.
Advantage of the present invention is: through regulating the size of TCR thyristor trigger angle, the electric current that control flows is crossed impedor reaches the purpose of controlling reactive power.According to the situation of change of reactive load power, select to cut the option of capacitive reactance device, compensate each phase power factor; In a word, no matter how the reactive power of load changes, making sum of the two always is constant; This constant equals the numerical value of the capacitive reactive power that the capacitor group sends, and to make the reactive power of taking from electrical network be constant or be 0, that is :=and constant (or 0); Finally make the power factor of electrical network remain on set point; Voltage fluctuates hardly, thereby reaches the purpose of reactive power compensation, to suppress system voltage fluctuation and the flickering that the fluctuation of load was caused.
Description of drawings
Below in conjunction with the embodiment accompanying drawing the present invention is described further:
Fig. 1 is the embodiment of the invention 1 structural representation;
Fig. 2 is the embodiment of the invention 2 structural representations.
Among the figure, 1, the TCR thyristor; 2, impedor; 3, FC filter; 4, fling-cut switch; 5, load; 6, bus.
Embodiment
As shown in Figure 1; The reactive power capacitive compensator; Comprise FC filter 3, TCR thyristor 1, impedor 2 and control unit, FC filter 3 and be connected between the bus 6 of load 5 fling-cut switch 4 is arranged, fling-cut switch 5 is used for switching FC filter 3; The capacitive reactive power compensation is provided, compensates each phase power factor and harmonic, TCR thyristor 1 control impedor 2 is used for balance sysmte because the lagging reactive power that fluctuation produced of load.
Fling-cut switch 4 is electrically connected with control unit with TCR thyristor 1, the signal that TCR thyristor 1 is accepted from control system, and the size of change thyristor trigger angle produces corresponding reactive power compensation electric current.
TCR thyristor 1 adopt valve body compact technique, horizontal installation, compact conformation, reliable, maintenance workload is few.
Control unit calculates electric network reactive-load in real time, the size of control TCR thyristor 1 trigger angle, and then the size of control compensation reactive power.
FC filter 3 provides capacitive reactive power to bus 6, and suppresses the harmonic wave of the system that flows through, and improves power factor.Power capacitor is installed natural cooling for the group posture in the FC filter 3.Filter reactor is the hollow dry type, natural cooling.Compensation impedor 2 provides system needed lagging reactive power, and steady load is impacted the voltage fluctuation that is produced.Impedor 2 is hollow dry types, twin coil up and down, natural cooling.
As shown in Figure 2; The reactive power capacitive compensator; Comprise FC filter 3, TCR thyristor 1, impedor 2 and control unit, fling-cut switch 4 is arranged between FC filter 3 and the ground wire, fling-cut switch 5 is used for switching FC filter 3; The capacitive reactive power compensation is provided, compensates each phase power factor and harmonic, TCR thyristor 1 control impedor 2 is used for balance sysmte because the lagging reactive power that fluctuation produced of load.
Claims (5)
1. reactive power capacitive compensator; Comprise FC filter, TCR thyristor, impedor and control unit; It is characterized in that: be electrically connected through fling-cut switch between FC filter and the bus that is connected to load; Fling-cut switch is used for switching capacitive reactance device, the capacitive reactive power compensation is provided, compensates each phase power factor and harmonic, and TCR thyristor control impedor is used for balance sysmte because the lagging reactive power that fluctuation produced of load.
2. reactive power capacitive compensator according to claim 1; It is characterized in that: fling-cut switch and TCR thyristor are electrically connected with control unit; The TCR thyristor is accepted the signal from control system, changes the size of thyristor trigger angle, produces corresponding reactive power compensation electric current.
3. reactive power capacitive compensator according to claim 1 is characterized in that: 3, the TCR thyristor adopts valve body compacting, horizontal installation.
4. reactive power capacitive compensator according to claim 1 is characterized in that: power capacitor is installed natural cooling for the group posture in the FC filter.
5. reactive power capacitive compensator according to claim 1 is characterized in that: impedor is the hollow dry type, twin coil up and down, natural cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104386337A CN102437580A (en) | 2011-12-25 | 2011-12-25 | Reactive power capacitor compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104386337A CN102437580A (en) | 2011-12-25 | 2011-12-25 | Reactive power capacitor compensator |
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| CN102437580A true CN102437580A (en) | 2012-05-02 |
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| CN2011104386337A Pending CN102437580A (en) | 2011-12-25 | 2011-12-25 | Reactive power capacitor compensator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248280A (en) * | 2013-05-16 | 2013-08-14 | 宁波理工电力电子设备有限公司 | TCR soft start and SVC dynamic reactive power compensation device and soft start and dynamic reactive power compensation method |
| CN103401530A (en) * | 2013-07-31 | 2013-11-20 | 华南理工大学 | Impedance stepless matching network used for ultrasonic power supply and control method |
Citations (5)
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| CN201234139Y (en) * | 2008-08-01 | 2009-05-06 | 西安爱科电子有限责任公司 | Dynamic reactive compensation apparatus for drilling well power distribution network |
| CN201868884U (en) * | 2010-11-22 | 2011-06-15 | 国网南自控股（杭州）有限公司 | Complete device special for reactive compensation of electrified railway |
| CN201994681U (en) * | 2011-04-14 | 2011-09-28 | 襄樊卓达尔工业控制有限公司 | High-voltage still reactive dynamic compensating device |
| CN102222916A (en) * | 2011-06-29 | 2011-10-19 | 株洲变流技术国家工程研究中心有限公司 | Device and method for boosting network voltage at tail end of electrified railway power supply arm |
| CN202474865U (en) * | 2011-12-25 | 2012-10-03 | 陕西航天西诺美灵电气有限公司 | Reactive power capacitance compensation arrangement |
-
2011
- 2011-12-25 CN CN2011104386337A patent/CN102437580A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201234139Y (en) * | 2008-08-01 | 2009-05-06 | 西安爱科电子有限责任公司 | Dynamic reactive compensation apparatus for drilling well power distribution network |
| CN201868884U (en) * | 2010-11-22 | 2011-06-15 | 国网南自控股（杭州）有限公司 | Complete device special for reactive compensation of electrified railway |
| CN201994681U (en) * | 2011-04-14 | 2011-09-28 | 襄樊卓达尔工业控制有限公司 | High-voltage still reactive dynamic compensating device |
| CN102222916A (en) * | 2011-06-29 | 2011-10-19 | 株洲变流技术国家工程研究中心有限公司 | Device and method for boosting network voltage at tail end of electrified railway power supply arm |
| CN202474865U (en) * | 2011-12-25 | 2012-10-03 | 陕西航天西诺美灵电气有限公司 | Reactive power capacitance compensation arrangement |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248280A (en) * | 2013-05-16 | 2013-08-14 | 宁波理工电力电子设备有限公司 | TCR soft start and SVC dynamic reactive power compensation device and soft start and dynamic reactive power compensation method |
| CN103401530A (en) * | 2013-07-31 | 2013-11-20 | 华南理工大学 | Impedance stepless matching network used for ultrasonic power supply and control method |
| CN103401530B (en) * | 2013-07-31 | 2016-04-13 | 华南理工大学 | The stepless matching network of a kind of impedance for ultrasonic power |
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Owner name: SHAANXI AEROSPACE SINO MEILINE ELECTRICAL CO., LTD Free format text: FORMER OWNER: XI'AN FU'AN INNOVATION CONSULTATION CO., LTD. Effective date: 20120419 |
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Free format text: CORRECT: ADDRESS; FROM: 710077 XI'AN, SHAANXI PROVINCE TO: 710025 XI'AN, SHAANXI PROVINCE |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20120419 Address after: 710025 Xi'an, Baqiao, Tian Hong street, a word no. 137 Applicant after: Shaanxi Spaceflight Xino Meiling Electric Co., Ltd. Address before: 710077, building 1, Residence Du Commerce, 69 Kam Yip Road, hi tech Zone, Shaanxi, Xi'an Applicant before: Xi'an Fuan Innovation Consultation Co., Ltd. |
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Application publication date: 20120502 |