CN104037701A - DC (Direct Current)-based deicing and SVG (Static Var Generator) device capable of reducing capacity of transformer - Google Patents
DC (Direct Current)-based deicing and SVG (Static Var Generator) device capable of reducing capacity of transformer Download PDFInfo
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- CN104037701A CN104037701A CN201410283080.6A CN201410283080A CN104037701A CN 104037701 A CN104037701 A CN 104037701A CN 201410283080 A CN201410283080 A CN 201410283080A CN 104037701 A CN104037701 A CN 104037701A
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Abstract
The invention discloses a DC (Direct Current)-based deicing and SVG (Static Var Generator) device capable of reducing capacity of a transformer. The device comprises a high-voltage breaker, a transformer and a converter component, wherein the primary side of the transformer is connected with a power grid through the high-voltage breaker, a secondary side winding of the transformer is connected with the converter component, and the output end of the converter component is connected with an overhead line of the power grid; the converter component comprises a fully-controlled rectifying module and an uncontrollable rectifying unit, wherein the fully-controlled rectifying module is formed by a plurality of fully-controlled rectifying units, the output ends of the fully-controlled rectifying units are sequentially and serially connected, the input ends of the fully-controlled rectifying units are respectively connected with the independent secondary windings of a plurality of corresponding winding phase shift step-down transformers and the input end of the uncontrollable rectifying unit is connected with the power grid through a grid side high-voltage breaker. According to the device provided by the invention, the de-icing operation can be performed on the circuits with different voltage levels in a transformer substation, and an SVG function can be realized, therefore, the use ratio of the device can be improved.
Description
Technical field
The present invention relates to a kind of DC ice melting SVG device of holding concurrently, is a kind of DC ice melting that reduces transformer capacity SVG device of holding concurrently specifically.
Background technology
The low-temperature freezing rain and snow disaster occurring at the beginning of China 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.
DC ice melting principle is using icing circuit as load, and it is applied to DC ice melting power supply, and wherein DC ice melting power acquisition provides short circuit current to heat icing circuit by low voltage, and then icing is melted.And current DC ice melting power supply only has ice-melt function,, there is the shortcoming of function singleness in competence exertion effect in special time that just can be in the winter time, and this shortcoming causes its cost performance lower simultaneously, makes it not possess good engineering application prospect.
For this reason, Chinese invention patent application CN 102761085 A, a kind of DC ice melting electric source topology is disclosed, it comprises the first net side primary cut-out, the second net side primary cut-out, many windings phase shift step-down transformer, current transformer and isolating switch module, current transformer is the many level current transformers of chain type, realize the conversion of DC ice melting and SVG function by the switching of two primary cut-outs and isolating switch, but there is following defect in this DC ice melting power supply: (1) topological structure complexity, complex operation, switching between DC ice melting and no-power compensation function, need to just can complete through multiple switching manipulations the conversion of topological structure, (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) the 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, drop into before ice-melt and must check comprehensively and test, otherwise its security of operation, reliability is difficult to ensure.
Summary of the invention
Technical problem underlying to be solved by this invention is: how realizing direct voltage size can regulate; While not needing ice-melt, how to reach the object of reactive power compensation, thereby have SVG function concurrently, and then increase operation rate; How to filter the harmonic wave that uncontrollable rectification produces; How to realize that more convenient operation, practicality are stronger, efficiency is higher, safeguard more convenient and price is cheaper.
The technical scheme that the present invention solves above technical problem is:
A kind of DC ice melting that reduces transformer capacity SVG device of holding concurrently, comprise: net side primary cut-out, many windings phase shift step-down transformer and current transformer assembly, the former limit of many windings phase shift step-down transformer connects electrical network by net side primary cut-out, the inferior limit winding of many windings phase shift step-down transformer connects current transformer assembly, and the output of current transformer assembly connects the overhead wire of electrical network, current transformer assembly comprises full-controlled rectifier module and a uncontrollable rectification unit of at least one the full-controlled rectifier cell formation being connected in series successively by output, the input of full-controlled rectifier unit connects with the inferior limit independent winding of corresponding many windings phase shift step-down transformer through low-voltage circuit breaker respectively, the input of uncontrollable rectification unit connects electrical network through net side primary cut-out, full-controlled rectifier module is connected with the output of uncontrollable rectification unit, full-controlled rectifier module is connected with the positive pole of uncontrollable rectification unit, the negative pole of full-controlled rectifier module and uncontrollable rectification unit is as DC output end.
The hold concurrently direct voltage size of SVG device of this DC ice melting can regulate, thereby changes the series winding quantity of unit by the low-voltage circuit breaker of deciliter each unit; Also can finely tune by the direct voltage that regulates full-controlled rectifier unit, the amplitude of accommodation is this cells rated voltage 0-15%; In the time of needs 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; In the time not needing ice-melt, can send perception or capacitive reactive power electric current to electrical network according to instruction by the full-controlled rectifier unit of IGBT module composition, reach the object of reactive power compensation, make this DC de-icing device have SVG function concurrently, thereby improved the utilance of device.
As can be seen here, the present invention can carry out ice-melt work to the circuit of all different electric pressures in transformer station, while carrying 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, the divide-shut brake of the input contactor (circuit breaker) by full-controlled rectifier unit is cut to throw and is used, and cuts throwing speed fast, and ice-melt workload is little; When not ice-melt, electrical network does 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 being made up of IGBT sends perception or capacitive reactive power electric current according to instruction to electrical network, reaches the object of reactive power compensation; Utilize simple line construction can obtain the effect of killing two birds with one stone; In addition, because uncontrollable rectification directly connects input power part, when DC ice melting, can produce larger current harmonics, SVG power cell now can be used as again APF filter, filters the harmonic wave that uncontrollable rectification produces, and has played beyond thought technique effect.
The technical scheme that the present invention further limits is:
The aforesaid DC ice melting that the reduces transformer capacity SVG device of holding concurrently, wherein full-controlled rectifier module is connected with the output of uncontrollable rectification unit.In the time that full-controlled rectifier module is connected with the output of uncontrollable rectification unit, its direct current is output as a point gear boost mode, on the basis of the kenotron rectifier of connecting, then promotes direct voltage, by the full-controlled rectifier element number regulation stall dropping into.
The aforesaid DC ice melting that the reduces transformer capacity SVG device of holding concurrently, wherein full-controlled rectifier module is connected with the positive pole of uncontrollable rectification unit, and the negative pole of described full-controlled rectifier module and uncontrollable rectification unit is as DC output end.When full-controlled rectifier module is connected with the positive pole of uncontrollable rectification unit, when the negative pole of full-controlled rectifier module and uncontrollable rectification unit is exported as direct current, power supply is stepping potential drop die pressing type, on the basis of the kenotron rectifier of connecting, reduce the direct voltage of output, by the full-controlled rectifier element number regulation stall dropping into.
The aforesaid DC ice melting that the reduces transformer capacity SVG device of holding concurrently, wherein full-controlled rectifier unit is three phase controlled rectifier circuit, its ac input end is connected with low-voltage circuit breaker through three-phase LC filter, three phase controlled rectifier circuit is made up of A phase IGBT module, B phase IGBT module and C phase IGBT module, the IGBT module of each phase forms by two power tubes, the DC output end parallel connection of A phase IGBT module, B phase IGBT module and C phase IGBT module, as the direct current output of full-controlled rectifier unit.
The aforesaid DC ice melting that the reduces transformer capacity SVG device of holding concurrently, wherein the DC output end of three phase controlled rectifier circuit is connected to electric capacity, for maintaining the stable and DC filtering of busbar voltage.
The aforesaid DC ice melting that the reduces transformer capacity SVG device of holding concurrently, wherein uncontrollable rectification unit is three-phase diode rectifier bridge, the three-phase dc output parallel connection of three-phase diode rectifier bridge, as the direct current output of three-phase diode rectifier bridge.
The aforesaid DC ice melting that the reduces transformer capacity SVG device of holding concurrently, wherein the former limit winding of many windings phase shift step-down transformer adopts Y-connection mode or Angle connection mode; The inferior limit winding of many windings phase shift step-down transformer adopts Angle connection mode.
The aforesaid DC ice melting that the reduces transformer capacity SVG device of holding concurrently, wherein the electric pressure of net side primary cut-out, according to transformer station's builtin voltage classification, is 7.2kV, 12kV or 40.5kV.
The aforesaid DC ice melting that the reduces transformer capacity SVG device of holding concurrently, wherein net side primary cut-out is connected in electrical network, utilizes the divide-shut brake of net side primary cut-out to realize the long-range divide-shut brake of this device.
The aforesaid DC ice melting that the reduces transformer capacity SVG device of holding concurrently, wherein the output of net side primary cut-out connects respectively many windings phase shift step-down transformer and uncontrollable rectification unit, many windings phase shift step-down transformer is used as voltage matches, input high pressure is dropped to low pressure, the inferior limit winding output of many windings phase shift step-down transformer connects full-controlled rectifier unit, AC voltage conversion is become direct voltage by full-controlled rectifier unit, and the DC output end of full-controlled rectifier unit and uncontrollable rectification unit is together in series successively, final output dc voltage is the voltage that is added in overhead wire.
The invention has the beneficial effects as follows: (1) system is simple, Operation and Maintenance is strong, adopts the design of blocking, and single rectification unit breaks down does not affect the use of whole equipment; (2) practical, can carry out ice-melt work to the circuit of all different electric pressures in transformer station; While carrying 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, the divide-shut brake of the input contactor (circuit breaker) by full-controlled rectifier unit is cut to throw and is used, cut throwing speed fast, ice-melt workload is little; (3) forward series boosting mode adaptive is in the higher application of ice-melt voltage request, and differential concatenation decompression mode is adapted to direct voltage and requires very much lower application; (4) the capacity of SVG and DC ice melting capacity can be according to the actual demand proportional arrangement of transformer station; (5) transformer capacity only need to configure according to the capacity of SVG, the capacity of transformer can reduce ice-melt time; (6) because uncontrollable rectification directly connects input power part, when DC ice melting, can produce larger current harmonics, SVG power cell now can be used as again APF filter, filters the harmonic wave that uncontrollable rectification produces; (7) when not ice-melt, electrical network does 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 being made up of IGBT sends perception or capacitive reactive power electric current according to instruction to electrical network, reaches the object of reactive power compensation; (8) on the basis of implementing SVG application, add ice-melt function, small investment, effect is large; (9) because can being used as SVG at ordinary times always, this device using, uncontrollable rectification unit is charged work always, thereby can reduce due to the overhaul of the equipments workload and the expense that often do not use before the use causing, in case of emergency, equipment can directly drop into ice-melt and use, and has greatly reduced overhaul of the equipments workload and expense before using.
Brief description of the drawings
Fig. 1 is the schematic block circuit diagram of the embodiment of the present invention 1.
Fig. 2 is the circuit theory diagrams of full-controlled rectifier of the present invention unit.
Fig. 3 is the circuit theory diagrams of uncontrollable rectification unit of the present invention.
Fig. 4 is the schematic block circuit diagram of the embodiment of the present invention 2.
Embodiment
embodiment 1
The present embodiment provides a kind of DC ice melting that reduces transformer capacity SVG device of holding concurrently, schematic block circuit diagram as shown in Figure 1, comprise: net side primary cut-out QF, many windings phase shift step-down transformer TM1 and current transformer assembly, the former limit of many windings phase shift step-down transformer TM1 connects electrical network by net side primary cut-out QF, the inferior limit winding of many windings phase shift step-down transformer TM1 connects current transformer assembly, the output of current transformer assembly connects the overhead wire of electrical network, current transformer assembly comprises: the full-controlled rectifier module of the some full-controlled rectifier cell formations that are connected in series successively by output, with a uncontrollable rectification unit, the input of full-controlled rectifier unit connects with the inferior limit independent winding of corresponding many windings phase shift step-down transformer TM1 through low-voltage circuit breaker QF1 respectively, the input of uncontrollable rectification unit connects electrical network through net side primary cut-out QF, full-controlled rectifier module is connected with the output of uncontrollable rectification unit, form direct current output loop.In this example, the former limit winding of many windings phase shift step-down transformer TM1 adopts Y-connection mode, in addition, can also adopt Angle connection mode, and the inferior limit winding of many windings phase shift step-down transformer TM1 adopts Angle connection mode.
As shown in Figure 2: the full-controlled rectifier unit in the present embodiment is three phase controlled rectifier circuit, its ac input end is connected with low-voltage circuit breaker QF1 through three-phase LC filter (being made up of with three pole reactor L1 three phase capacitance C1), three phase controlled rectifier circuit is by A phase IGBT module UA1, B phase IGBT module UB1, C phase IGBT module UC1 composition, the IGBT module of each phase forms by two power tubes, A phase IGBT module UA1, B phase IGBT module UB1, the DC output end parallel connection of C phase IGBT module UC1, as the direct current output of full-controlled rectifier unit, the DC output end of three phase controlled rectifier circuit is connected to capacitor C 0, capacitor C 0 plays the stable and DC filtering effect of busbar voltage that maintains.
As shown in Figure 3: in the present embodiment, uncontrollable rectification unit is three-phase diode rectifier bridge, the three-phase dc output parallel connection of three-phase diode rectifier bridge, as the direct current output of three-phase diode rectifier bridge, in figure, UA0 is A diode phase, and UB0 is B diode phase, and UC0 is C diode phase.
The electric pressure of net side primary cut-out QF can, according to transformer station's builtin voltage classification, can be 7.2kV, 12kV or 40.5kV etc.Net side primary cut-out QF is connected in electrical network, utilizes the divide-shut brake of net side primary cut-out QF can realize apparatus remote and divides/close a floodgate.The output of net side primary cut-out QF connects respectively many windings phase shift step-down transformer TM1 and three-phase diode rectifier bridge, and many windings phase shift step-down transformer TM1 is used as voltage matches, and input high pressure is dropped to low pressure, and winding output in inferior limit connects full-controlled rectifier unit.AC voltage conversion is become direct voltage by full-controlled rectifier unit, and the DC output end of full-controlled rectifier unit and uncontrollable rectification unit is together in series successively, and final output dc voltage is the voltage that is added in overhead wire.
The present embodiment is forward series boosting pattern, is adapted to the application that ice-melt voltage request is higher, on the basis of the kenotron rectifier of connecting, then promotes direct voltage, by the full-controlled rectifier element number regulation stall dropping into.
embodiment 2
The present embodiment provides a kind of DC ice melting that reduces transformer capacity SVG device of holding concurrently, schematic block circuit diagram as shown in Figure 4, circuit elements device and connected mode substantially the same manner as Example 1, difference is only that full-controlled rectifier module is connected with the positive pole of uncontrollable rectification unit, and the negative pole of full-controlled rectifier module and uncontrollable rectification unit is as DC output end.This example is differential concatenation decompression mode, is adapted to direct voltage and requires very much lower application, on the basis of the kenotron rectifier of connecting, reduces the direct voltage of output, by the full-controlled rectifier element number regulation stall dropping into.
In addition to the implementation, the present invention can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of requirement of the present invention.
Claims (10)
1. the DC ice melting that can the reduce transformer capacity SVG device of holding concurrently, comprise: net side primary cut-out, many windings phase shift step-down transformer and current transformer assembly, the former limit of described many windings phase shift step-down transformer connects electrical network by described net side primary cut-out, the inferior limit winding of described many windings phase shift step-down transformer connects described current transformer assembly, and the output of described current transformer assembly connects the overhead wire of electrical network; It is characterized in that: described current transformer assembly comprises full-controlled rectifier module and a uncontrollable rectification unit of at least one the full-controlled rectifier cell formation being connected in series successively by output, the input of described full-controlled rectifier unit connects with the inferior limit independent winding of corresponding many windings phase shift step-down transformer through low-voltage circuit breaker respectively, and the input of described uncontrollable rectification unit connects electrical network through described net side primary cut-out.
2. the DC ice melting that the reduces transformer capacity as claimed in claim 1 SVG device of holding concurrently, is characterized in that: described full-controlled rectifier module is connected with the output of uncontrollable rectification unit, forms direct current output loop.
3. the DC ice melting that the reduces transformer capacity as claimed in claim 1 SVG device of holding concurrently, it is characterized in that: described full-controlled rectifier module is connected with the positive pole of uncontrollable rectification unit, and the negative pole of described full-controlled rectifier module and uncontrollable rectification unit is as DC output end.
4. the DC ice melting of the reduced transformer capacity as described in arbitrary claim in the claim 1-3 SVG device of holding concurrently, it is characterized in that: described full-controlled rectifier unit is three phase controlled rectifier circuit, its ac input end is connected with low-voltage circuit breaker through three-phase LC filter, described three phase controlled rectifier circuit is by A phase IGBT module, B phase IGBT module and C phase IGBT module composition, the IGBT module of each phase forms by two power tubes, A phase IGBT module, the DC output end parallel connection of B phase IGBT module and C phase IGBT module, as the direct current output of described full-controlled rectifier unit.
5. the DC ice melting that the reduces transformer capacity as claimed in claim 4 SVG device of holding concurrently, is characterized in that: the DC output end of described three phase controlled rectifier circuit is connected to electric capacity, for maintaining the stable and DC filtering of busbar voltage.
6. the DC ice melting of the reduced transformer capacity as described in arbitrary claim in the claim 1-3 SVG device of holding concurrently, it is characterized in that: described uncontrollable rectification unit is three-phase diode rectifier bridge, the three-phase dc output parallel connection of three-phase diode rectifier bridge, as the direct current output of three-phase diode rectifier bridge.
7. the DC ice melting of the reduced transformer capacity as described in arbitrary claim in the claim 1-3 SVG device of holding concurrently, is characterized in that: the former limit winding of described many windings phase shift step-down transformer adopts Y-connection mode or Angle connection mode; The inferior limit winding of described many windings phase shift step-down transformer adopts Angle connection mode.
8. the DC ice melting of the reduced transformer capacity as described in arbitrary claim in the claim 1-3 SVG device of holding concurrently, it is characterized in that: the electric pressure of described net side primary cut-out, according to transformer station's builtin voltage classification, is 7.2kV, 12kV or 40.5kV.
9. the DC ice melting of the reduced transformer capacity as described in arbitrary claim in the claim 1-3 SVG device of holding concurrently, it is characterized in that: described net side primary cut-out is connected in electrical network, utilize the divide-shut brake of net side primary cut-out to realize the long-range divide-shut brake of this device.
10. the DC ice melting of the reduced transformer capacity as described in arbitrary claim in the claim 1-3 SVG device of holding concurrently, it is characterized in that: the output of described net side primary cut-out connects respectively many windings phase shift step-down transformer and uncontrollable rectification unit, many windings phase shift step-down transformer is used as voltage matches, input high pressure is dropped to low pressure, the inferior limit winding output of many windings phase shift step-down transformer connects full-controlled rectifier unit, AC voltage conversion is become direct voltage by full-controlled rectifier unit, and the DC output end of full-controlled rectifier unit and uncontrollable rectification unit is together in series successively, final output dc voltage is the voltage that is added in overhead wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410283080.6A CN104037701A (en) | 2014-06-23 | 2014-06-23 | DC (Direct Current)-based deicing and SVG (Static Var Generator) device capable of reducing capacity of transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410283080.6A CN104037701A (en) | 2014-06-23 | 2014-06-23 | DC (Direct Current)-based deicing and SVG (Static Var Generator) device capable of reducing capacity of transformer |
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| CN104037701A true CN104037701A (en) | 2014-09-10 |
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| CN201410283080.6A Pending CN104037701A (en) | 2014-06-23 | 2014-06-23 | DC (Direct Current)-based deicing and SVG (Static Var Generator) device capable of reducing capacity of transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753015A (en) * | 2015-04-16 | 2015-07-01 | 国家电网公司 | Ice melting device for electric transmission line |
| CN105514905A (en) * | 2015-12-28 | 2016-04-20 | 中电普瑞科技有限公司 | Movable ice melting device with STATCOM function |
| CN107359579A (en) * | 2017-09-07 | 2017-11-17 | 国网湖南省电力公司 | Based on the complementary intensive DC de-icing device of SVG and diode rectifier |
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| US4560917A (en) * | 1983-12-21 | 1985-12-24 | Westinghouse Electric Corp. | Static VAR generator having reduced harmonics |
| CN101546896A (en) * | 2008-03-29 | 2009-09-30 | 国网南京自动化研究院 | Ice melting method and device used by same |
| CN102496898A (en) * | 2011-11-16 | 2012-06-13 | 四川大学 | Bifunctional direct current ice melting apparatus based on voltage source type current converter and ice melting 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 |
| CN103490649A (en) * | 2013-10-17 | 2014-01-01 | 国家电网公司 | Reusable direct-current ice melting device |
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2014
- 2014-06-23 CN CN201410283080.6A patent/CN104037701A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4560917A (en) * | 1983-12-21 | 1985-12-24 | Westinghouse Electric Corp. | Static VAR generator having reduced harmonics |
| CN101546896A (en) * | 2008-03-29 | 2009-09-30 | 国网南京自动化研究院 | Ice melting method and device used by same |
| CN102496898A (en) * | 2011-11-16 | 2012-06-13 | 四川大学 | Bifunctional direct current ice melting apparatus based on voltage source type current converter and ice melting 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 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753015A (en) * | 2015-04-16 | 2015-07-01 | 国家电网公司 | Ice melting device for electric transmission line |
| CN105514905A (en) * | 2015-12-28 | 2016-04-20 | 中电普瑞科技有限公司 | Movable ice melting device with STATCOM function |
| CN105514905B (en) * | 2015-12-28 | 2023-08-25 | 中电普瑞科技有限公司 | Movable ice melting device with STATCOM function |
| CN107359579A (en) * | 2017-09-07 | 2017-11-17 | 国网湖南省电力公司 | Based on the complementary intensive DC de-icing device of SVG and diode rectifier |
| CN107359579B (en) * | 2017-09-07 | 2023-06-23 | 国网湖南省电力公司 | Intensive direct-current ice melting device based on SVG and diode rectifier complementation |
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Owner name: ZHOU XIWEN Free format text: FORMER OWNER: JIANGSU UONONE NEW ENERGY CO., LTD. Effective date: 20140926 Owner name: JIANGSU UONONE NEW ENERGY CO., LTD. Effective date: 20140926 |
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Effective date of registration: 20140926 Address after: 212211 Jiangsu city of Zhenjiang Province South Road Yangzhong City New Technology Park No. 1 Applicant after: Zhou Xiwen Applicant after: Jiangsu Uonone New Energy Co., Ltd. Address before: 212211 Jiangsu city of Zhenjiang Province South Road Yangzhong City New Technology Park No. 1 Applicant before: Jiangsu Uonone New Energy Co., Ltd. |
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Application publication date: 20140910 |