CN104078911A - Direct current deicing and SVG device low in cost and capable of continuously regulating voltage - Google Patents
Direct current deicing and SVG device low in cost and capable of continuously regulating voltage Download PDFInfo
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- CN104078911A CN104078911A CN201410329766.4A CN201410329766A CN104078911A CN 104078911 A CN104078911 A CN 104078911A CN 201410329766 A CN201410329766 A CN 201410329766A CN 104078911 A CN104078911 A CN 104078911A
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- ice melting
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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]
Abstract
A direct current deicing and SVG device low in cost and capable of continuously regulating the voltage comprises an input high-voltage switching cabinet (1), a multi-winding phase shift step-down transformer (2) and a current transformer cabinet (3). The current transformer cabinet of the device comprises two unit sets. One unit set is composed of a diode non-controllable rectifier unit and an IGBT full-control rectification unit, direct current output parts are connected in parallel, wherein an output part of the unit set is connected with one output winding of the multi-winding phase shift step-down transformer through a breaker, and a two-gear selective switch is added between a controllable rectification unit and a non-controllable rectification unit in the unit set. During SVG application, alternating current parts are connected on the secondary side of the transformer in parallel through the selective switch; during deicing application, the input part of the controllable rectification and the direct current negative end of the non-controllable rectification are connected in parallel through the selective switch, and then the IGBT full-control rectification unit is used for performing DC/DC chopper control. The other unit set is the non-controllable rectification unit composed of a diode. The direct current deicing and SVG device is used for performing deicing and reactive compensation.
Description
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technical field
The present invention relates to DC ice melting that a kind of low cost can the continuous voltage regulating SVG device of holding concurrently, belong to power grid maintenance technical field.
background technology
The low-temperature freezing rain and snow disaster occurring at the beginning of 2008, causes the most areas electrical network facilities in south electric network region to be subjected to heavy damage, and transferring electricity from the west to the east is also had a strong impact on.For improving the defensive ability/resistance ability of electrical network to extreme climate, major natural disasters, south electric network has started " DC de-icing device prototype design " project, has opened the beginning in domestic this field.Along with the deterioration of environment, exceedingly odious weather happens occasionally, and research and develop a kind of simple and practical DC de-icing device of economy again still has realistic meaning very much.
Domestic had at present the ice-melt dual-purpose technology of reactive power compensation SVG of holding concurrently to produce, but system is comparatively complicated, what invention was the most similar therewith is a kind of DC ice melting electric source topology of Zhuzhou National Engineering Research Center of Converters Co., Ltd.'s invention, comprise the first net side primary cut-out, the second net side primary cut-out, many windings of phase shift rectifier transformer, current transformer, high voltage reactor and isolating switch module etc., current transformer is the many level current transformers of chain type, realizes the conversion of DC ice melting and reactive power compensation SVG function by the switching of circuit breaker and isolating switch.
The hold concurrently shortcoming of reactive power compensation SVG device topological circuit of prior art DC ice melting is:
(1) system and device wiring is complicated, complex operation, and the switching between DC ice melting and no-power compensation function, need to just can complete the conversion of topological structure through a plurality of switching manipulations;
(2) output dc voltage adjustable extent is little, must more than the direct voltage that meets controlled rectification condition, regulate, and cannot effectively adapt to the transmission line of different length;
(3) capacity of SVG and DC ice melting capacity can not be according to the actual demand proportional arrangement of transformer station;
(4) device volume is huge, transports extremely inconvenient;
(5) for the DC de-icing device of simple function, overwhelming majority time (circuit does not need ice-melt) is in idle state, the utilance of device is low, must check comprehensively and test before dropping into ice-melt, otherwise its security of operation, reliability is difficult to guarantee.
summary of the invention
The object of the invention is, according to the existing DC ice melting shortcoming of SVG device topological circuit of holding concurrently, the present invention proposes the DC ice melting that a kind of low cost can continuous voltage regulating and has SVG device concurrently.
Technical scheme of the present invention is, the DC ice melting that a kind of low cost of the present invention can the continuous voltage regulating reactive power compensation SVG device of holding concurrently forms by inputting high-tension switch cabinet, many windings phase shift step-down transformer and converter cabinet.The output of input high-tension switch cabinet connects the input of many windings phase shift step-down transformer; The output of many windings phase shift step-down transformer connects converter cabinet.
Described input high-tension switch cabinet is the interface of apparatus of the present invention and power supply network.
Many windings of the present invention phase shift step-down transformer is as voltage matches; The former limit winding of many windings phase shift step-down transformer is star or Angle connection mode.
Converter cabinet of the present invention comprises two kinds of unit groups:
By a diode, control rectifier unit and an IGBT full-controlled rectifier unit do not form a kind of unit group, direct current output is in parallel, its importation is connected by an output winding of contactor (circuit breaker) and many windings step-down transformer, the full-controlled rectifier unit in this unit group and do not control the selector switch that has added two gears between rectification unit; During SVG application, both AC portions are in parallel by selector switch at transformer time avris; During ice-melt application, the importation of full-controlled rectifier is together in parallel by selector switch and the direct current negative terminal of not controlling rectification, and now IGBT full-controlled rectifier unit is as DC/DC chopper control.
Another unit group be by diode, formed do not control rectification unit.These 2 kinds of unit groups, do not control rectification unit and IGBT full-controlled rectifier unit by 1:1 proportional arrangement.This is the core of whole topological circuit, and the large I of device output dc voltage, by changing the series winding quantity of unit group, is carried out stepless level and smooth pressure regulation with DC/DC copped wave.While needing ice-melt, the direct voltage of output is applied to and freezes on electrical network, utilizes large electric current to make the principle of overhead wire heating realize ice-melt.When not needing ice-melt, also can be used as electric network reactive compensation SVG device, the full-controlled rectifier unit consisting of IGBT can send perception or capacitive reactive power electric current to electrical network according to instruction, reaches the object of reactive power compensation, thereby improves the utilance of device.
The rectification module DC output end of described full-controlled rectifier unit is connected to capacitor C.
At described full-controlled rectifier with do not control the selector switch QS that has added two gears between rectification unit.
The invention has the beneficial effects as follows, the present invention adopts stepless pressure regulation technology, meets the different demands of client, and in Ke Dui transformer station, the circuit of all different electric pressures carries out ice-melt work.Increase the allocation ratio of diode simultaneously, reduced the allocation ratio of IGBT, effectively reduced cost.When apparatus of the present invention are carried out ice-melt, determine the output dc voltage value of current transformer according to the sectional area of overhead wire and length, thereby determine the quantity of the rectifier of series connection, cut throwing speed fast, ice-melt workload is little.During not ice-melt of apparatus of the present invention, electrical network is done electric network reactive compensation use under normal circumstances, and the utilance of equipment is high, and the three-phase four-quadrant full-controlled rectifier device consisting of IGBT sends perception or capacitive reactive power electric current according to instruction to electrical network, reaches the object of reactive power compensation.Apparatus of the present invention are simple, and Operation and Maintenance is strong, adopt the design of blocking, and single rectification unit breaks down does not affect the use of whole equipment.
The circuit that the present invention is applicable to all different electric pressures in transformer station carries out the ice-melt reactive power compensation of holding concurrently.
accompanying drawing explanation
Fig. 1 is system main circuit topological structure figure;
Fig. 2 is the converter cell sketch under SVG mode of operation;
Fig. 3 is converter cell sketch under ice-melt mode of operation;
Wherein, the 1st, input high-tension switch cabinet; The 2nd, many windings step-down transformer TM1; The 3rd, converter cabinet; The 4th, input electrical network; The 5th, overhead wire; The 21st, Transformer Winding 1 output; The 22nd, Transformer Winding 2 outputs;
UA1, UB1, UC1 are IGBT full-controlled rectifier unit; UA0, UB0, UC0, UA2, UB2, UC2 are diode; QS is selector switch; QF is primary cut-out; C is electric capacity; L is inductance.
Embodiment
The specific embodiment of the present invention as shown in the figure.
A kind of low cost of the present embodiment can continuous voltage regulating the DC ice melting reactive power compensation SVG device of holding concurrently by inputting high-tension switch cabinet 1, many windings phase shift step-down transformer 2 and converter cabinet 3, form.The output of input high-tension switch cabinet 1 connects the input of many windings phase shift step-down transformer 2; The output of many windings phase shift step-down transformer 2 connects converter cabinet 3.
Figure 1 shows that the main circuit topological structure figure of the present embodiment.
The primary cut-out QF of input high-tension switch cabinet 1 is connected in electrical network 4, utilizes the divide-shut brake of QF can realize apparatus remote and divides/close a floodgate.The output of QF meets many windings phase shift step-down transformer TM1, TM1 is used as voltage matches, input high pressure is dropped to low pressure, a class secondary winding output connect controlled rectifier unit and by diode, formed do not control rectification unit group, another kind of secondary winding output connects that diode forms does not control rectification unit.
The present embodiment converter cabinet comprises two kinds of unit group U1 and U2.By a diode, control rectifier unit (diode UA0, UB0, UC0) and an IGBT full-controlled rectifier unit (UA1, UB1, UC1) do not form U1 unit group, direct current output is in parallel, and its importation is connected with an output winding of many windings step-down transformer by circuit breaker.U2 unit group consists of diode does not control rectification unit (UA2, UB2, UC2).
Zu HeU1 unit, U2 unit group is in the configuration of converter cabinet, by 1:1 proportional arrangement.
During SVG mode of operation, the mode of operation of current transformer part as shown in Figure 2, circuit breaker closes, diverter switch is closed, transformer output winding 1 connects LC filter, then by IGBT rectification, output direct current, AC uncontrollable diode rectification unit in parallel, exports direct current together with IGBT output DC parallel simultaneously.
During ice-melt mode of operation, the mode of operation of current transformer part as shown in Figure 3, circuit breaker closes, diverter switch disconnects, U1, two unit groups of U2 are place in circuit simultaneously, and in U1 circuit, the importation of controlled rectification is together in parallel with the direct current negative terminal of not controlling rectification, now IGBT is as DC/DC chopper control, and the direct voltage that the direct voltage of U1 output and U2 are not controlled rectification output is concatenated.According to ice-melt required voltage, the size of electric current, determines U1, the configuration number of two kinds of unit groups of U2, and U1 wherein, U2 presses 1:1 configuration, and the direct current output of all unit group is concatenated, and final output dc voltage is the voltage that is added in overhead wire.
Claims (6)
1. the DC ice melting that a low cost can the continuous voltage regulating SVG device of holding concurrently, comprise input high-tension switch cabinet, many windings phase shift step-down transformer and converter cabinet, it is characterized in that, the converter cabinet of described device comprises two kinds of unit groups: by a diode, control rectifier unit and an IGBT full-controlled rectifier unit do not form a kind of unit group, direct current output is in parallel, its importation is connected with an output winding of many windings step-down transformer by contactor (circuit breaker), full-controlled rectifier unit in this unit group and do not control the selector switch that has added two gears between rectification unit, during SVG application, both AC portions are in parallel by selector switch at transformer time avris, during ice-melt application, the importation of controlled rectification is together in parallel by selector switch and the direct current negative terminal of not controlling rectification, and now IGBT full-controlled rectifier unit is as DC/DC chopper control, another unit group be by diode, formed do not control rectification unit.
2. the DC ice melting that a kind of low cost according to claim 1 can the continuous voltage regulating SVG device of holding concurrently, it is characterized in that, the large I of described device output dc voltage realizes by changing the series winding quantity of unit group, and described device is done DC/DC copped wave by IGBT, realizes stepless level and smooth pressure regulation.
3. the DC ice melting that a kind of low cost according to claim 1 can the continuous voltage regulating SVG device of holding concurrently, is characterized in that, in described converter cabinet, two kinds of unit groups are pressed 1:1 proportional arrangement.
4. the DC ice melting that a kind of low cost according to claim 1 can the continuous voltage regulating SVG device of holding concurrently, is characterized in that, described device is at ordinary times as reactive power compensation, during electrical network icing as DC ice melting power supply.
5. the DC ice melting that a kind of low cost according to claim 1 can the continuous voltage regulating SVG device of holding concurrently, is characterized in that, the rectification module DC output end of described full-controlled rectifier unit is connected to electric capacity.
6. the DC ice melting that a kind of low cost according to claim 1 can the continuous voltage regulating SVG device of holding concurrently, is characterized in that, described selector switch is three grades of commutators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410329766.4A CN104078911B (en) | 2014-07-11 | 2014-07-11 | A kind of low cost can the DC ice melting of continuous voltage regulating be held concurrently SVG device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410329766.4A CN104078911B (en) | 2014-07-11 | 2014-07-11 | A kind of low cost can the DC ice melting of continuous voltage regulating be held concurrently SVG device |
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| CN104078911A true CN104078911A (en) | 2014-10-01 |
| CN104078911B CN104078911B (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025986A (en) * | 2016-07-25 | 2016-10-12 | 国网湖南省电力公司 | Hybrid direct current ice melting apparatus with output voltage and current being continuously adjustable |
| CN106159862A (en) * | 2016-07-25 | 2016-11-23 | 国网湖南省电力公司 | A kind of 500kV transformer station intensive style direct current ice melting system having SVG function concurrently |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6433520B1 (en) * | 2001-05-29 | 2002-08-13 | Siemens Power Transmission & Distribution Inc | Dc power regulator incorporating high power ac to dc converter with controllable dc voltage and method of use |
| CN101673950A (en) * | 2009-10-15 | 2010-03-17 | 中电普瑞科技有限公司 | Static var compensator (SVC) and DC ice melting device and realization method thereof |
| CN201590771U (en) * | 2009-06-18 | 2010-09-22 | 江西省电力科学研究院 | Multipurpose large-power controllable power source |
| CN102761085A (en) * | 2012-07-04 | 2012-10-31 | 株洲变流技术国家工程研究中心有限公司 | Direct-current ice-melting power supply topology |
-
2014
- 2014-07-11 CN CN201410329766.4A patent/CN104078911B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6433520B1 (en) * | 2001-05-29 | 2002-08-13 | Siemens Power Transmission & Distribution Inc | Dc power regulator incorporating high power ac to dc converter with controllable dc voltage and method of use |
| CN201590771U (en) * | 2009-06-18 | 2010-09-22 | 江西省电力科学研究院 | Multipurpose large-power controllable power source |
| CN101673950A (en) * | 2009-10-15 | 2010-03-17 | 中电普瑞科技有限公司 | Static var compensator (SVC) and DC ice melting device and realization method thereof |
| CN102761085A (en) * | 2012-07-04 | 2012-10-31 | 株洲变流技术国家工程研究中心有限公司 | Direct-current ice-melting power supply topology |
Non-Patent Citations (1)
| Title |
|---|
| 陆佳政等: "直流融冰装置拓扑结构的比较研究", 《电力系统保护与控制》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025986A (en) * | 2016-07-25 | 2016-10-12 | 国网湖南省电力公司 | Hybrid direct current ice melting apparatus with output voltage and current being continuously adjustable |
| CN106159862A (en) * | 2016-07-25 | 2016-11-23 | 国网湖南省电力公司 | A kind of 500kV transformer station intensive style direct current ice melting system having SVG function concurrently |
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| CN104078911B (en) | 2017-01-04 |
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