CN202535082U - Static synchronous compensator operating system under mode of parallel connection of flexible direct current system and wind power farm - Google Patents
Static synchronous compensator operating system under mode of parallel connection of flexible direct current system and wind power farm Download PDFInfo
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- CN202535082U CN202535082U CN 201220128370 CN201220128370U CN202535082U CN 202535082 U CN202535082 U CN 202535082U CN 201220128370 CN201220128370 CN 201220128370 CN 201220128370 U CN201220128370 U CN 201220128370U CN 202535082 U CN202535082 U CN 202535082U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a static synchronous compensator operating system under a mode of parallel connection of a flexible direct current system and a wind power farm. The static synchronous compensator operating system comprises: a 35-KV switch station; a 35-KV wind power farm, which is connected with the 35-KV switch station by an alternating current line circuit; a first 35-KV convertor station; and a second 35-KV convertor station. Specifically, the first 35-KV convertor station and the second 35-KV convertor station are connected by a direct current line circuit; the first 35-KV convertor station is connected with the 35-KV wind power farm by an alternating current line circuit; and the second 35-KV convertor station is connected with the 35-KV switch station by an alternating current line circuit. The direct current line between the first 35-KV convertor station and the second 35-KV convertor station is arranged into electrode isolation; and the first 35-KV convertor station and the second 35-KV convertor station form a static synchronous compensator. According to the utility model, the static synchronous compensator is employed to realize parallel connection of the power grid and the wind power farm, thereby improving the reliability of the grid-connected operation of the wind power farm and eliminating the impact on the frequency voltage adjustment and dynamic stability by a wind power access system.
Description
Technical field
The utility model relates to a kind of flexible direct current system and wind energy turbine set and connects the static reacance generator operational system under the mode.
Background technology
At present, the voltage of the present stable state of quality table of wind power generation, stable frequency, safe continuously power supply and minimizing are polluted power grid environment.The position multidigit of wind energy turbine set is in remote districts, away from electrical network, for the wind energy smooth delivery of power is gone out; In the actual motion, the general employing maked somebody a mere figurehead or two kinds of outlet methods of cable, according to the separate unit fan capacity; There is the shared case of two typhoon machines to become, or form of maybe networking such as case change of the corresponding use of a blower fan, in design process; In line with reducing project cost, improve the principle of power supply reliability, in conjunction with the electric position that receives of wind energy turbine set connecting system; Feasible and the economy of transmission line capability, transmission distance is confirmed wind energy turbine set outlet electric pressure and feeder number, simultaneously according to the wind energy turbine set planning of finally installing, and considers wind energy turbine set geography, landform, reaches actual conditions such as outlet; Multiple networking mode is carried out Technological Economy relatively, the optimum way of selected wind energy turbine set area power grid power supply.
The wind-powered electricity generation net is that to the shortcoming of mains supply it is to the impact of net capacity, and the generated output of wind-powered electricity generation depends on wind-force fully; Wind-force itself changes big, and is under-supply in the time of possibly causing the electrical network shortcoming, when network load is low; High like generated output, then unnecessary electricity can only cause the fluctuation of electrical network by artificial raising load; The whole distract dispatching of power netwoks is posed a big pressure the harm power grid security.
The utility model content
The utility model provides a kind of flexible direct current system and wind energy turbine set and connects the static reacance generator operational system under the mode, has improved wind farm grid-connected reliability of operation, overcomes wind-powered electricity generation and inserts the influence in voltage to frequency adjustment and dynamic stability to system.
For realizing above-mentioned purpose, the utility model provides a kind of flexible direct current system and wind energy turbine set and connects the static reacance generator operational system under the mode, is characterized in that this system comprises:
35 kilovolts of switchyards;
35 kilovolts of wind energy turbine set, it is connected through the ac line circuit with 35 kilovolts of switchyards;
Through the one 35 kilovolt of current conversion station and the 2 35 kilovolt of current conversion station that the ac line circuit connects, the one 35 kilovolt of current conversion station connects 35 kilovolts of wind energy turbine set through the ac line circuit, and the 2 35 kilovolt of current conversion station connects 35 kilovolts of switchyards through the ac line circuit;
Ac line between above-mentioned the one 35 kilovolt of current conversion station and the 2 35 kilovolt of current conversion station is made as the utmost point isolates, the one 35 kilovolt of current conversion station and the 2 35 kilovolt of current conversion station composition static reacance generator.
35 kilovolts of above-mentioned wind energy turbine set comprise 35 kilovolts of buses of first wind energy turbine set and the 35 kilovolts of buses of second wind energy turbine set that are connected in series, and the 10 kilovolts of buses of first wind energy turbine set that are connected in series and 10 kilovolts of buses of second wind energy turbine set;
Circuit is connected with 35 kilovolts of switches of wind energy turbine set between 35 kilovolts of buses of above-mentioned first wind energy turbine set and 35 kilovolts of buses of second wind energy turbine set; 35 kilovolts of buses of the 35 kilovolts of buses of this first wind energy turbine set and second wind energy turbine set also parallel circuit are connected the one 35 kilovolt of current conversion station and 35 kilovolts of switchyards;
Circuit is connected with 35 kilovolts of switches of wind energy turbine set between above-mentioned 10 kilovolts of buses of first wind energy turbine set and 10 kilovolts of buses of second wind energy turbine set; Circuit is connected with several wind-driven generators on 10 kilovolts of buses of this first wind energy turbine set and 10 kilovolts of buses of second wind energy turbine set;
Above-mentioned 10 kilovolts of buses of the 35 kilovolts of buses of first wind energy turbine set and first wind energy turbine set are connected through 35/10 kv transformer circuit;
Above-mentioned 10 kilovolts of buses of the 35 kilovolts of buses of second wind energy turbine set and second wind energy turbine set are connected through 35/10 kv transformer circuit;
35 kilovolts of switches of above-mentioned wind energy turbine set are in running status.
35 kilovolts of above-mentioned switchyards comprise 35 kilovolts of buses of 35 kilovolts of buses of first switchyard and second switch station;
Be connected in series with 35 kilovolts of switches of switchyard between 35 kilovolts of bus outside electric power network of above-mentioned first switchyard system, itself and network system; 35 kilovolts of buses of this first switchyard also are connected with the 2 35 kilovolt of current conversion station circuit, are connected in series with 35 kilovolts of switches of switchyard and transformer between itself and the 2 35 kilovolt of current conversion station;
Be connected in series with 35 kilovolts of switches of switchyard between the above-mentioned second switch station 35 kilovolts of bus outside electric power network system, itself and network system; The 35 kilovolts of buses in this second switch station also are connected with 35 kilovolts of wind energy turbine set circuit, are connected in series with 35 kilovolts of switches of switchyard and transformer between itself and 35 kilovolts of wind energy turbine set.
35 kilovolts of switches of above-mentioned switchyard are in running status.
Above-mentioned the one 35 kilovolt of current conversion station and the 2 35 kilovolt of current conversion station comprise the 35 kilovolts of buses of current conversion station that are connected in series, 35 kilovolts of switches, change of current change and converter valve;
The one 35 kilovolt of current conversion station is connected through the ac line circuit with the converter valve of the 2 35 kilovolt of current conversion station;
35 kilovolts of bus circuits of the current conversion station of the one 35 kilovolt of current conversion station connect 35 kilovolts of wind energy turbine set;
35 kilovolts of bus circuits of the current conversion station of the 2 35 kilovolt of current conversion station connect 35 kilovolts of switchyards;
Above-mentioned converter valve adopts the voltage-source type converter valve based on the modular multilevel technology.
Electrical network links to each other through two loops with wind energy turbine set; Wherein 35 kilovolts of switchyards of a route directly insert 35 kilovolts of buses of second wind energy turbine set of 35 kilovolts of wind energy turbine set through ac line; And link to each other with wind-driven generator by 35/10 kv transformer, realize being incorporated into the power networks of wind-driven generator and system;
35 kilovolts of switchyards of an other route insert the 2 35 kilovolt of current conversion station earlier and convert direct current into; The ac line of passing through of the 2 35 kilovolt of current conversion station converter valve links to each other with the converter valve of the one 35 kilovolt of current conversion station; DC line between the 2 35 kilovolt of current conversion station and the one 35 kilovolt of current conversion station is made as the utmost point isolates; The 2 35 kilovolt of current conversion station and the one 35 kilovolt of current conversion station are participated in AC system voltage/idle adjusting; As the static reacance generator running status, be converted into 35 kilovoltage grades through change of current change again in the one 35 kilovolt of current conversion station, insert 35 kilovolts of buses of first wind energy turbine set of 35 kilovolts of wind energy turbine set then through ac line; And link to each other with wind-driven generator by 35/10 kv transformer, realize being incorporated into the power networks of wind-driven generator and network system.
The flexible direct current system of the utility model and wind energy turbine set and the static reacance generator operational system that connects under the mode are compared with prior art; Its advantage is; The utility model adopts static reacance generator and gets access to grid and wind energy turbine set; Improved wind farm grid-connected reliability of operation, overcome wind-powered electricity generation and insert the influence in voltage to frequency adjustment and dynamic stability to system.
Description of drawings
Fig. 1 is the utility model electricity flexible direct current system and wind energy turbine set and the circuit module figure that connects the static reacance generator operational system under the mode;
Fig. 2 is the utility model flexible direct current system and wind energy turbine set and the circuit theory diagrams that connect 35 kilovolts of switchyards of the static reacance generator operational system under the mode;
Fig. 3 is the utility model flexible direct current system and wind energy turbine set and the circuit theory diagrams that connect 35 kilovolts of current conversion stations of the static reacance generator operational system under the mode;
Fig. 4 is the utility model flexible direct current system and wind energy turbine set and the circuit theory diagrams that connect 35 kilovolts of wind energy turbine set of the static reacance generator operational system under the mode.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the utility model is described.
As shown in Figure 1; The utility model discloses a kind of flexible direct current system and wind energy turbine set and connect the static reacance generator operational system under the mode; This system comprises 1,35 kilovolts of wind energy turbine set of 35 kilovolts of switchyards the 2, the 1 kilovolt of current conversion station 3 and the 2 35 kilovolt of current conversion station 4, and electrical network links to each other through two loops with wind energy turbine set.
Wherein the ac line circuit through overhead transmission line or cable line is connected between one tunnel, 35 kilovolts of switchyards 1 and the 35 kilovolts of wind energy turbine set 2.
Another road, 35 kilovolts of switchyards 1 ac line circuit through overhead transmission line or cable line connects the ac line circuit of 4,35 kilovolts of wind energy turbine set 2 of the 2 35 kilovolt of current conversion station through overhead transmission line or cable line and connects the one 35 kilovolt of current conversion station 3.Connect through direct current cables or overhead wire circuit between the one 35 kilovolt of current conversion station 3 and the 2 35 kilovolt of current conversion station 4; Ac line between the one 35 kilovolt of current conversion station 3 and the 2 35 kilovolt of current conversion station 4 is made as the utmost point and isolates; Be that DC line is anodal, negative line switch cutter draws back; The ground connection plug-in strip draws back, and makes the one 35 kilovolt of current conversion station 3 and the 2 35 kilovolt of current conversion station 4 form static reacance generator (STATCOM).
As shown in Figure 2,35 kilovolts of switchyards 1 include the two-way circuit, include 35 kilovolts of buses 13 of first switchyard in one the tunnel, and this route road circuit connects the static reacance generator that 35 kilovolts of current conversion stations are formed.Include the 35 kilovolts of buses 14 in second switch station in another road, this circuit directly connects 35 kilovolts of wind energy turbine set 2 through ac line.
35 kilovolts of buses 13 of first switchyard are connected with the outside electric power network circuit system, are connected in series with 35 kilovolts of switches 11 of switchyard between 35 kilovolts of buses 13 of first switchyard and the network system.35 kilovolts of buses 13 of this first switchyard also are connected with the 2 35 kilovolt of current conversion station 4 circuit of static reacance generator, are connected in series with 35 kilovolts of switches of switchyard 11 and transformer 12 between itself and the 2 35 kilovolt of current conversion station 4.35 kilovolts of switches of this switchyard 11 are 35 kilovolts of switches of HD4 type (running status), and transformer 12 is a SZ9-20000/35 type transformer.
The 35 kilovolts of buses 14 in second switch station are the outside electric power network system also, is connected in series with 35 kilovolts of switches 11 of switchyard between itself and the network system.The 35 kilovolts of buses 14 in this second switch station are connected with 35 kilovolts of wind energy turbine set 2 circuit, are connected in series with 35 kilovolts of switches of switchyard 11 and transformer 12 between itself and the 35 kilovolts of wind energy turbine set 2.35 kilovolts of switches of this switchyard 11 are 35 kilovolts of switches of HD4 type (running status), and transformer 12 is a SZ9-20000/35 type transformer.
As shown in Figure 3, the one 35 kilovolt of current conversion station 3 and the 2 35 kilovolt of current conversion station 4 of forming static reacance generator comprise 31,35 kilovolts of switches 32 of 35 kilovolts of buses of current conversion station, change of current change 33 and the converter valve 34 that is connected in series.The change of current becomes 33 and adopts the change of current of ZZS-20000/36.5 type to become, the voltage-source type converter valve (M60) that converter valve 34 adopts based on modular multilevel (MMC) technology.
The converter valve 34 of the one 35 kilovolt of current conversion station 3 is connected with the ac line circuit of the converter valve 34 of the 2 35 kilovolt of current conversion station 4 through direct current cables or overhead wire; Anodal in the DC line, negative line switch cutter draws back; The ground connection plug-in strip draws back, and DC line is made as the utmost point isolates.35 kilovolts of buses 31 of the current conversion station of the one 35 kilovolt of current conversion station 3 are connected through the alternating current circuit circuit with 35 kilovolts of wind energy turbine set 2.35 kilovolts of buses 31 of the current conversion station of the 2 35 kilovolt of current conversion station 4 are connected through the alternating current circuit circuit with 35 kilovolts of switchyards 1.
As shown in Figure 4,35 kilovolts of wind energy turbine set 2 comprise 35 kilovolts of buses 21 of first wind energy turbine set and the 35 kilovolts of buses 22 of second wind energy turbine set that are connected in series, and the 10 kilovolts of buses 23 of first wind energy turbine set that are connected in series and 10 kilovolts of buses 24 of second wind energy turbine set.
Connect through 35 kilovolts of switch 26 circuit of a wind energy turbine set between 35 kilovolts of buses 21 of first wind energy turbine set and 35 kilovolts of buses 22 of second wind energy turbine set, 35 kilovolts of switches of wind energy turbine set 26 are 35 kilovolts of switches of HD4 type (running status).
Connect through 35 kilovolts of switch 26 circuit of a wind energy turbine set between 10 kilovolts of buses 23 of first wind energy turbine set and 10 kilovolts of buses 24 of second wind energy turbine set, 35 kilovolts of switches of wind energy turbine set 26 are 35 kilovolts of switches of HD4 type (running status).
10 kilovolts of bus 23 circuit of the 35 kilovolts of buses 21 of first wind energy turbine set and first wind energy turbine set are connected to an electric energy transmitting circuit: 35 kilovolts of buses 21 of first wind energy turbine set are connected one 35 kilovolts of current conversion stations 3 of static reacance generator through 5 kilovolts of switching circuits.Circuit is connected with several wind-driven generators 25 on 10 kilovolts of buses 23 of first wind energy turbine set.Circuit is connected with one 35/10 kv transformer between 35 kilovolts of buses 21 of first wind energy turbine set and 10 kilovolts of buses 23 of first wind energy turbine set, and these transformer two ends are connected with 35 kilovolts of switches respectively.
10 kilovolts of buses 24 tunnel of the 35 kilovolts of buses 22 of second wind energy turbine set and second wind energy turbine set are connected to another electric energy transmitting circuit: 35 kilovolts of buses of second wind energy turbine set 22 are crossed the ac line that 5 kilovolts of switch direct circuits are connected overhead transmission line, and directly connect 35 kilovolts of switchyards 1 through ac line.Circuit is connected with several wind-driven generators 25 on 10 kilovolts of buses 24 of second wind energy turbine set.Circuit is connected with one 35/10 kv transformer between 35 kilovolts of buses 22 of second wind energy turbine set and 10 kilovolts of buses 24 of second wind energy turbine set, and these transformer two ends are connected with 35 kilovolts of switches respectively.
Above-mentioned wind-driven generator 25 adopts GE1.5S wind-driven generator (speed-changing oar-changing double-fed blower fan).
The utility model flexible direct current system and wind energy turbine set and to connect the workflow of the static reacance generator operational system under the mode following:
Electrical network links to each other through two loops with wind energy turbine set; Wherein 35 kilovolts of outlets of 35 kilovolts of switchyards 1 of a route (or 35 kilovolts of outlets of transformer station); Insert 35 kilovolts of buses 22 of second wind energy turbine set of 35 kilovolts of wind energy turbine set 2 through 35 kilovolts of overhead transmission lines or cable line; And link to each other with wind-driven generator 25 by 35/10 kv transformer, realize being incorporated into the power networks of wind-driven generator 25 and system.
35 kilovolts of outlets of 35 kilovolts of switchyards 1 of an other route (or 35 kilovolts of outlets of transformer station); 35 kilovolts of overhead transmission lines of warp or cable line insert 35 kilovolts of buses of the 2 35 kilovolt of current conversion station 4 earlier; Become 33 by 35 kilovolts of changes of current and be converted into 30 specified kilovoltage grades of direct current system; And convert direct current into through voltage-source type converter valve 34, and link to each other with the converter valve 34 of the one 35 kilovolt of current conversion station 3 through direct current cables or overhead wire, this DC line is made as utmost point isolation; The anodal negative line switch of DC line cutter is drawn back; The ground connection plug-in strip draws back, and the 2 35 kilovolt of current conversion station 4 and the one 35 kilovolt of current conversion station 3 are participated in AC system voltage/idle adjusting, as the static reacance generator running status.Become 33 through 35 kilovolts of changes of current once more in the one 35 kilovolt of current conversion station 3 and be converted into 35 kilovoltage grades; Again through exchanging 35 kilovolts of buses 21 of first wind energy turbine set that overhead wire or cable connect 35 kilovolts of wind energy turbine set 2; And link to each other with wind-driven generator 25 by 35/10 kv transformer, realize being incorporated into the power networks of wind-driven generator 25 and system.
Although the content of the utility model has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to the restriction to the utility model.After those skilled in the art have read foregoing, for the multiple modification of the utility model with to substitute all will be conspicuous.Therefore, the protection range of the utility model should be limited appended claim.
Claims (4)
1. a flexible direct current system and wind energy turbine set and connect the static reacance generator operational system under the mode is characterized in that this system comprises:
35 kilovolts of switchyards (1);
35 kilovolts of wind energy turbine set (2), it is connected through the ac line circuit with described 35 kilovolts of switchyards (1);
The one 35 kilovolt of current conversion station (3) and the 2 35 kilovolt of current conversion station (4) through the connection of ac line circuit; The one 35 kilovolt of current conversion station (3) connects 35 kilovolts of wind energy turbine set (2) through the ac line circuit, and the 2 35 kilovolt of current conversion station (4) connects 35 kilovolts of switchyards (1) through the ac line circuit;
Ac line between described the one 35 kilovolt of current conversion station (3) and the 2 35 kilovolt of current conversion station (4) is made as the utmost point isolates, and the one 35 kilovolt of current conversion station (3) formed static reacance generator with the 2 35 kilovolt of current conversion station (4).
2. electrical network as claimed in claim 1 is through flexible direct current system and wind energy turbine set and welding system; It is characterized in that; Described 35 kilovolts of wind energy turbine set (2) comprise 35 kilovolts of buses of first wind energy turbine set (21) and the 35 kilovolts of buses of second wind energy turbine set (22) that are connected in series, and the 10 kilovolts of buses of first wind energy turbine set (23) that are connected in series and 10 kilovolts of buses of second wind energy turbine set (24);
Circuit is connected with 35 kilovolts of switches of wind energy turbine set (26) between said 35 kilovolts of buses of first wind energy turbine set (21) and the 35 kilovolts of buses of second wind energy turbine set (22); 35 kilovolts of buses of this first wind energy turbine set (21) and 35 kilovolts of buses of second wind energy turbine set (22) also respectively circuit be connected the one 35 kilovolt of current conversion station (3) and 35 kilovolts of switchyards (1);
Circuit is connected with 35 kilovolts of switches of wind energy turbine set (26) between described 10 kilovolts of buses of first wind energy turbine set (23) and the 10 kilovolts of buses of second wind energy turbine set (24); 10 kilovolts of buses of this first wind energy turbine set (23) and 10 kilovolts of buses of second wind energy turbine set (24) are gone up circuit and are connected with several wind-driven generators (25);
Described 35 kilovolts of buses of first wind energy turbine set (21) are connected through 35/10 kv transformer circuit with 10 kilovolts of buses of first wind energy turbine set (23);
Described 35 kilovolts of buses of second wind energy turbine set (22) are connected through 35/10 kv transformer circuit with 10 kilovolts of buses of second wind energy turbine set (24);
35 kilovolts of switches of described wind energy turbine set (26) are in running status.
3. electrical network as claimed in claim 1 is characterized in that through flexible direct current system and wind energy turbine set and welding system described 35 kilovolts of switchyards (1) comprise 35 kilovolts of buses of first switchyard (13) and the 35 kilovolts of buses in second switch station (14);
Be connected in series with 35 kilovolts of switches of switchyard (11) between said 35 kilovolts of buses of first switchyard (13) the outside electric power network system, itself and network system; 35 kilovolts of buses of this first switchyard (13) also are connected with the 2 35 kilovolt of current conversion station (4) circuit, are connected in series with 35 kilovolts of switches of switchyard (11) and transformer (12) between itself and the 2 35 kilovolt of current conversion station (4);
Be connected in series with 35 kilovolts of switches of switchyard (11) between the 35 kilovolts of buses in said second switch station (14) the outside electric power network system, itself and network system; The 35 kilovolts of buses in this second switch station (14) also are connected with 35 kilovolts of wind energy turbine set (2) circuit, are connected in series with 35 kilovolts of switches of switchyard (11) and transformer (12) between itself and the 35 kilovolts of wind energy turbine set (2);
35 kilovolts of switches of described switchyard (11) are in running status.
4. electrical network as claimed in claim 1 is through flexible direct current system and wind energy turbine set and welding system; It is characterized in that described the one 35 kilovolt of current conversion station (3) and the 2 35 kilovolt of current conversion station (4) comprise the 35 kilovolts of buses of current conversion station (31), 35 kilovolts of switches (32), the change of current that are connected in series and become (33) and converter valve (34);
The one 35 kilovolt of current conversion station (3) is connected through the ac line circuit with the converter valve (34) of the 2 35 kilovolt of current conversion station (4);
35 kilovolts of buses of the current conversion station of the one 35 kilovolt of current conversion station (3) (31) circuit connects 35 kilovolts of wind energy turbine set (2);
35 kilovolts of buses of the current conversion station of the 2 35 kilovolt of current conversion station (4) (31) circuit connects 35 kilovolts of switchyards (1);
Described converter valve (34) adopts the voltage-source type converter valve based on the modular multilevel technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220128370 CN202535082U (en) | 2012-03-30 | 2012-03-30 | Static synchronous compensator operating system under mode of parallel connection of flexible direct current system and wind power farm |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220128370 CN202535082U (en) | 2012-03-30 | 2012-03-30 | Static synchronous compensator operating system under mode of parallel connection of flexible direct current system and wind power farm |
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| CN202535082U true CN202535082U (en) | 2012-11-14 |
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| CN 201220128370 Expired - Lifetime CN202535082U (en) | 2012-03-30 | 2012-03-30 | Static synchronous compensator operating system under mode of parallel connection of flexible direct current system and wind power farm |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078968A (en) * | 2014-07-10 | 2014-10-01 | 南京南瑞继保电气有限公司 | Direct-current transmission channel formed by transforming three-phase alternating current transmission cable |
| CN105469162A (en) * | 2015-11-25 | 2016-04-06 | 国网内蒙古东部电力有限公司检修分公司 | Extra-high voltage converter station electromagnetic interference prediction method and system |
-
2012
- 2012-03-30 CN CN 201220128370 patent/CN202535082U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078968A (en) * | 2014-07-10 | 2014-10-01 | 南京南瑞继保电气有限公司 | Direct-current transmission channel formed by transforming three-phase alternating current transmission cable |
| CN105469162A (en) * | 2015-11-25 | 2016-04-06 | 国网内蒙古东部电力有限公司检修分公司 | Extra-high voltage converter station electromagnetic interference prediction method and system |
| CN105469162B (en) * | 2015-11-25 | 2019-04-26 | 国网内蒙古东部电力有限公司检修分公司 | A kind of ultra-high voltage converter station electromagnetic interference prediction technique and system |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121114 |
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| CX01 | Expiry of patent term |