CN104538976A - Device with direct current deicing function and static reactive compensation function - Google Patents
Device with direct current deicing function and static reactive compensation function Download PDFInfo
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- CN104538976A CN104538976A CN201410838323.8A CN201410838323A CN104538976A CN 104538976 A CN104538976 A CN 104538976A CN 201410838323 A CN201410838323 A CN 201410838323A CN 104538976 A CN104538976 A CN 104538976A
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- reactor
- pulsation
- silicon controlled
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- thyristor
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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
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a device with the direct current deicing function and the static reactive compensation function. The device comprises a six-pulse-thyristor rectifier, a reactor group and isolation switches. The reactor group comprises six three-phase reactors. The six-pulse-thyristor rectifier comprises six pairs of three-phase thyristor rectification units. The isolation switches are arranged in connecting lines of the reactors and the thyristor rectification units. When the isolation switches are in a deicing open-close state, the two reactors in one phase in the reactor group are connected in parallel between the two pairs of thyristor rectification units of the corresponding phase in the six-pulse-thyristor rectifier, and the six-pulse-thyristor rectifier outputs direct currents to a load circuit for deicing; when the isolation switches are in a reactive compensation open-close state, a TCR phase-controlled reactor of the type that the reactors are controlled by thyristors is composed of the reactor group and the six-pulse-thyristor rectifier, and static reactive compensation is conducted on the load circuit. The direct current deicing function and the static reactive compensation function can be achieved by the device and the economical efficiency of the whole device is enhanced.
Description
Technical field
The present invention relates to electric and electronic technical field, refer to a kind of device having DC ice melting and static reactive function concurrently especially.
Background technology
A few years ago, south China area there occurs large-scale serious freezing rain and snow disaster weather, and cause electric power facility to suffer badly damaged, cause huge loss to electrical network, some areas electrical network is even subjected to crushing blow.The serious freezing rain and snow disaster of China Central China, southwest, East China can cause electrical network facilities icing snowberg serious, and wire breaking and tower falling line tripping phenomenon takes place frequently, and causes electrical network massive losses, and some areas electrical network even suffers crushing blow.For avoiding the recurrence of power grid accident, deicing is carried out to extra high voltage network and distribution line imperative.
Domestic and international research shows, DC ice melting technology is that one can realize big current, the effective ways of long transmission line ice-melt.But due to ice damage occur time and frequency all less, if DC ice melting equipment only can use as deicing device, its economy is poor.
Therefore, the economy how improving DC ice melting equipment is one of this area technical problem urgently to be resolved hurrily.
Summary of the invention
In view of this, the object of the invention is to propose a kind of device having DC ice melting and static reactive function concurrently, DC ice melting and static reactive can be realized, and under the prerequisite not affecting device effect, save special rectifier transformer, reduce cost of investment, enhance the economy of device entirety.
Based on the above-mentioned purpose device having DC ice melting and static reactive function concurrently provided by the invention, comprising: six pulsation silicon controlled rectifier, Reactor banks, and several isolating switches;
Wherein, described Reactor banks comprises six reactors of three-phase, and described six pulsation silicon controlled rectifiers comprise six pairs of thyristor rectifier unit of three-phase; Described isolating switch is arranged in the connecting line of reactor and thyristor rectifier unit;
When isolating switch is in ice-melt folding condition, in described Reactor banks, two reactors of a phase are connected in parallel between two pairs of thyristor rectifier unit of corresponding phase in described six pulsation silicon controlled rectifiers, and described six pulsation silicon controlled rectifiers export direct current to loaded line and carry out ice-melt;
When isolating switch is in reactive power compensation folding condition, described Reactor banks and described six is pulsed silicon controlled rectifier, forms thyristor-controlled reactor type TCR Controlled Reactor, carries out static reactive to loaded line.
As can be seen from above, the device having DC ice melting and static reactive function concurrently provided by the invention, do not comprise rectifier transformer, also need not adopt special commutating reactor or phased electric phase device, invest little, can by reasonably designing the parameter of reactor, reactor is used as Controlled Reactor under SVC mode, use as commutating reactor under DC ice melting mode, namely utilize the reconstruct under device different conditions, realize the switching of DC ice melting and SVC no-power compensation function.And, the present invention is not when affecting device effect, save the special rectifier transformer of traditional deicing device, by can the output capacity of assurance device ice-melt to the optimal design of commutating reactor, avoid the limitation problem due to the ice-melt output capacity using the capacity of special rectifier transformer fixedly to bring simultaneously, the operating state of thyristor controlled series compensation can be effectively improved, substantially increase technical stability and the economy of device entirety.
Accompanying drawing explanation
Fig. 1 is the schematic diagram having the device of DC ice melting and static reactive function concurrently of the embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Static Var Compensator is widely used in Voltage Cortrol, improves voltage levvl, reduces voltage fluctuation, improves power factor in low-voltage power supply and distribution system, suppress voltage flicker, balance asymmetric load, and the supporting filter of Static Var Compensator can absorb harmonic wave and harmonic reduction interference etc.In extra-high voltage transmission, the effect of Static Var Compensator is to provide reactive power compensation, adjustment voltage, improves system voltage level, improves the dynamic of electric power system and transient stability, suppress power-frequency overvoltage etc.
Therefore, the present inventor considers, if utilize DC de-icing device to realize static reactive, namely by certain design by DC ice melting function and static reactive function i ntegration in a device, then greatly will improve the economy of DC de-icing device, can the electrical network facilities icing snowberg that causes because of freezing rain and snow disaster of the solution of high-efficiency and economic serious, wire breaking and tower falling, line tripping and cause the problem of electrical network massive losses.And, the device having DC ice melting and static reactive function concurrently of the present invention, do not comprise rectifier transformer, the double commutating reactor done under DC ice melting mode of the Controlled Reactor under reactive power compensation operational mode can be utilized to realize DC ice melting to hold concurrently the function of SVC (static reactive), save DC ice melting and SVC special rectifier to become and DC side smoothing reactor, greatly reduce the occupation of land of single unit system, reduce noise and cost, and pass through the structural remodeling of the primary equipment under difference in functionality demand, the change of device control strategy, the mutual switching of DC ice melting and no-power compensation function can be realized, effectively improve utilance and the economy of device entirety.
Technical scheme of the present invention is described in detail below in conjunction with accompanying drawing.The structural representation of what the embodiment of the present invention provided have concurrently the device of DC ice melting and static reactive function, as shown in Figure 1, comprising: six pulsation silicon controlled rectifier 101, Reactor banks 102, and several isolating switches (not marking in figure).
Wherein, Reactor banks 102 comprises six reactors 1021 of three-phase.
Six pulsation silicon controlled rectifiers 101 comprise six pairs of thyristor rectifier unit 1011 of three-phase.
Isolating switch is arranged at reactor 1021 with the connecting line of thyristor rectifier unit 1011, to realize DC ice melting or static reactive function by the control supportive device of folding condition.
When isolating switch is in ice-melt folding condition, device of the present invention can realize DC ice melting function; Now, in Reactor banks 102, two reactors 1021 of a phase are connected in parallel between two pairs of thyristor rectifier unit 1011 of corresponding phase in six pulsation silicon controlled rectifiers 101, and six pulsation silicon controlled rectifiers 101 export direct current to loaded line and carry out ice-melt.Further, when isolating switch is in ice-melt folding condition, by changing the Trigger Angle of six pulsation silicon controlled rectifiers 101, the size of the direct current that six pulsation silicon controlled rectifiers 101 can be regulated to export.Particularly, when device of the present invention carries out ice-melt, Reactor banks 102 as commutating reactor connect six pulsation silicon controlled rectifiers 101, by ac power supply, six pulsation silicon controlled rectifiers 101 through over commutation with icing circuit for load exports direct current.Like this, direct current applies on the line, produces heat and line ice coating is melted.And, in circuit deicing processes, the size of adjusting circuit direct current can be carried out by the Trigger Angle changing thyristor valve.
When isolating switch is in reactive power compensation folding condition, device of the present invention can realize static reactive function; Now, Reactor banks 102 and six is pulsed silicon controlled rectifier 101, forms thyristor-controlled reactor type TCR Controlled Reactor, carries out static reactive to loaded line.Wherein, when isolating switch is in reactive power compensation folding condition, in Reactor banks 102, two reactors 1021 of a phase are connected on a pair thyristor rectifier unit 1011 both sides.Further, when isolating switch is in static reactive folding condition, by changing the Trigger Angle of six pulsation silicon controlled rectifiers 101, regulate the size of reactive power.
As shown in Figure 1, Reactor banks 102 comprises the independent detachable reactor 1021 of six of three-phase.Wherein, XL1 and XL2 is the commutating reactor of device A phase when carrying out DC ice melting, XL1 and XL2 is connected in parallel; When device carries out static reactive, XL1 connects with XL2, as Controlled Reactor after being connected in series two thyristor controlled series compensation.
Further, above-mentioned device also can comprise: filter branches group 103.
Filter branches group 103 for filtering six pulse silicon controlled rectifier 101 work time produce harmonic wave.Filter branches group 103 is also for being the reactive power required under rectification mode of above-mentioned six pulsation silicon controlled rectifiers 101.
More preferably, filter branches group 103 is 5 times or 7 filter branches groups.
As shown in Figure 1, Reactor banks 102 is connected to the transmission line of AC power by three-winding transformer 104.
In fact, silicon controlled rectifier 101 in device of the present invention and Reactor banks 102 are all reconfigurable structures, multiple isolating switch is utilized to be connected to each other, by the operation to line disconnecting switch, splitting and reorganizing is carried out to silicon controlled rectifier 101 and Reactor banks 102, form different topological structures, thus realize it and switch between DC ice melting function and static reactive (SVC) function, solve big current, high voltage, high-capacity direct current de-icing device problem and System Reactive Power compensation problem.
The output capacity of device of the present invention is very high, such as, and exportable rated current 4000A, direct voltage 26kV; Maximum current 4800A, ceiling voltage 32kV, the highest direct current power is more than 150MW.
The device having DC ice melting and static reactive function concurrently of the present invention, do not comprise rectifier transformer, also special commutating reactor or phased electric phase device need not be adopted, invest little, by reasonably designing the parameter of reactor, reactor can be used as Controlled Reactor under SVC mode, uses as commutating reactor under DC ice melting mode, namely utilize the reconstruct under device different conditions, realize the switching of DC ice melting and SVC no-power compensation function.And, the present invention is not when affecting device effect, save the special rectifier transformer of traditional deicing device, by can the output capacity of assurance device ice-melt to the optimal design of commutating reactor, avoid the limitation problem due to the ice-melt output capacity using the capacity of special rectifier transformer fixedly to bring simultaneously, the operating state of thyristor controlled series compensation can be effectively improved, substantially increase technical stability and the economy of device entirety.Become cost information (60MVA, 35kV, two winding transformer) according to relevant rectification, save special rectifier become one whole device can be made to save cost 3,000,000 RMB about.
Commutating reactor of the present invention is held concurrently Controlled Reactor, equipment can be realized and parameter is all compatible under DC ice melting and reactive power compensation two kinds of patterns, can limiting valve short circuit time the maximum surge current perfecting phase valve, when can ensure that valve normally runs, Trigger Angle is in the most rational scope; On the basis being optimized design, the limitation problem due to the ice-melt output capacity using special rectifier transformer capacity fixedly to bring can be avoided, can limiting valve short circuit time the maximum surge current perfecting phase valve, firing angle range when valve normally runs can be optimized, ensure that rectifying valve group is run under optimum operating condition, improve the reliability of plant running; By the optimal design to commutating reactor, reduce angle of overlap and reduce the ripple of direct current, thus saving DC side smoothing reactor, ensureing that interrupted situation does not appear in DC ice melting current simultaneously, improve the economy of package unit.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. have a device for DC ice melting and static reactive function concurrently, it is characterized in that, comprising: six pulsation silicon controlled rectifier, Reactor banks, and several isolating switches;
Wherein, described Reactor banks comprises six reactors of three-phase, and described six pulsation silicon controlled rectifiers comprise six pairs of thyristor rectifier unit of three-phase; Described isolating switch is arranged in the connecting line of reactor and thyristor rectifier unit;
When isolating switch is in ice-melt folding condition, in described Reactor banks, two reactors of a phase are connected in parallel between two pairs of thyristor rectifier unit of corresponding phase in described six pulsation silicon controlled rectifiers, and described six pulsation silicon controlled rectifiers export direct current to loaded line and carry out ice-melt;
When isolating switch is in reactive power compensation folding condition, described Reactor banks and described six is pulsed silicon controlled rectifier, forms thyristor-controlled reactor type TCR Controlled Reactor, carries out static reactive to loaded line.
2. device according to claim 1, is characterized in that, when isolating switch is in static reactive folding condition, in described Reactor banks, two reactors of a phase are connected on a pair thyristor rectifier unit both sides.
3. device according to claim 2, is characterized in that, also comprises:
Filter branches group, for the harmonic wave produced during six pulsation silicon controlled rectifier work described in filtering.
4. device according to claim 3, is characterized in that,
Described filter branches group also for providing required reactive power for described six pulsation silicon controlled rectifiers under rectification mode.
5. device according to claim 4, is characterized in that, described filter branches group is 5 times or 7 filter branches groups.
6., according to the arbitrary described device of claim 1-5, it is characterized in that,
When isolating switch is in ice-melt folding condition, by changing the Trigger Angle of described six pulsation silicon controlled rectifiers, the size of the direct current regulating described six pulsation silicon controlled rectifiers to export.
7. device according to claim 6, is characterized in that,
When isolating switch is in reactive power compensation folding condition, by changing the Trigger Angle of described six pulsation silicon controlled rectifiers, regulate the size of described reactive power.
8., according to the arbitrary described device of claim 1-5, it is characterized in that, described Reactor banks is connected to the transmission line of AC power by three-winding transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410838323.8A CN104538976A (en) | 2014-12-29 | 2014-12-29 | Device with direct current deicing function and static reactive compensation function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410838323.8A CN104538976A (en) | 2014-12-29 | 2014-12-29 | Device with direct current deicing function and static reactive compensation function |
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| CN104538976A true CN104538976A (en) | 2015-04-22 |
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| CN201410838323.8A Pending CN104538976A (en) | 2014-12-29 | 2014-12-29 | Device with direct current deicing function and static reactive compensation function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492896A (en) * | 2016-06-09 | 2017-12-19 | Ls 产电株式会社 | Reactive power compensation system and method |
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| CN107492896B (en) * | 2016-06-09 | 2020-05-19 | Ls 产电株式会社 | Reactive power compensation system and method thereof |
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