CN205017003U - Bypass unit, shunting device and subsynchronous oscillation restrain system - Google Patents
Bypass unit, shunting device and subsynchronous oscillation restrain system Download PDFInfo
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- CN205017003U CN205017003U CN201520662811.8U CN201520662811U CN205017003U CN 205017003 U CN205017003 U CN 205017003U CN 201520662811 U CN201520662811 U CN 201520662811U CN 205017003 U CN205017003 U CN 205017003U
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Abstract
The utility model relates to a power grid technology field discloses a bypass unit, shunting device and subsynchronous oscillation restrain system, the bypass unit includes: the crow bar protection circuit, it is parallelly connected with H bridge power unit, and the contactor, it is connected between two interchange outputs of H bridge power unit for when H bridge power unit is out of order, trigger corresponding crow bar protection circuit, so that the crow bar protection circuit is shunted fault current. The shunting device include with the subsynchronous oscillation controller in the same bypass unit of H bridge power unit quantity, and every H bridge power unit corresponds the electricity and connects a bypass unit. Subsynchronous oscillation suppression system includes this shunting device for when H bridge power unit broke down, the bypass unit that makes the required current conveyance of suppression subsynchronous oscillation correspond poured into generating set and electric wire netting into. The utility model provides the high operating stability of subsynchronous oscillation controller.
Description
Technical field
The utility model relates to electric power network technique field, particularly, relates to a kind of by-pass unit, shunting device and sub-synchronous oscillation and suppresses system.
Background technology
Along with the continuous expansion of network system, super high voltage direct current electricity transmission and heavy-duty generator group demand are also in improve, for reducing line transmission loss, conventional controlled series compensation improves voltage on line side at present, although the great economic benefit brought, but bring new trouble also to the safe and stable operation of generating set, subsynchronous oscillation of electrical power system is one of wherein comparatively serious problem.
At present, have a variety of to the method that sub-synchronous oscillation suppresses, also create the device of various suppression sub-synchronous oscillation.Wherein, suppress sub-synchronous oscillation to be the technology that research is more recently by controlling wholly-controled device, the maturation of static reacance generator (SVG) is that further developing of sub-synchronous oscillation suppression technology provides good basis.Based on static reacance generator, increasing subsynchronous oscillation damping controls also to start to be developed, and achieves good effect in actual applications.
In actual applications, sub-synchronous oscillation controller plays an important role for protection alternator shaft, prolongation generator life-span, therefore also requires that sub-synchronous oscillation controller can long-time stable reliably run.To this, the utility model proposes a kind of by-pass unit, shunting device and sub-synchronous oscillation and suppress system, to ensure the reliability of sub-synchronous oscillation controller.
Utility model content
The purpose of this utility model is to provide a kind of by-pass unit, shunting device and sub-synchronous oscillation and suppresses system, for solving the problem of the performance protection of sub-synchronous oscillation controller.
To achieve these goals, the technical solution of the utility model provides the by-pass unit of the H bridge power unit in a kind of sub-synchronous oscillation controller, comprising: crow-bar protection circuit, and it is in parallel with described H bridge power unit; And contactor, it is connected between two ac output ends of described H bridge power unit, for when H bridge power unit has fault, triggers corresponding crow-bar protection circuit, shunts to make described crow-bar protection circuit to fault current.
Described crow-bar protection circuit comprises thyristor, inductance and the resistance of connecting successively, and the anode of described thyristor and one end of described resistance connect one end of described H bridge power unit respectively.
The technical solution of the utility model additionally provides a kind of shunting device of sub-synchronous oscillation controller, comprising: above-mentioned by-pass unit; Wherein, described by-pass unit is configured to identical with the H bridge power unit quantity in sub-synchronous oscillation controller, and each H bridge power unit correspondence electrical connection described by-pass unit.
On the basis of technique scheme, the technical solution of the utility model is preferably each H bridge power unit and is parallel with a storage capacitor, and this storage capacitor is used for obtaining electric energy from electrical network, and for powering to described by-pass unit.
Be connected with chopper circuit between described storage capacitor and described by-pass unit, this chopper circuit for being the direct voltage of 110V by the convert of capacitor to voltage on described storage capacitor, and supplies by-pass unit.
Described chopper circuit is connected with a main control unit, and this main control unit is for controlling the direct voltage of described chopper circuit stable output.
Described chopper circuit comprises two voltage output ends, and the first voltage output end connects described contactor, for providing the direct voltage of 110V to described contactor; Second voltage output end connects a Switching Power Supply, and the direct voltage of 110V is converted to the direct voltage of 24V by described Switching Power Supply.
A thyristor trigger board is connected with between described Switching Power Supply and described crow-bar protection circuit; this thyristor trigger board is for triggering the switching device work in described crow-bar protection circuit, and the direct voltage of 24V is supplied this thyristor trigger board by described Switching Power Supply.
The technical solution of the utility model additionally provides a kind of sub-synchronous oscillation and suppresses system, comprising: sub-synchronous oscillation controller; And the shunting device of above-mentioned described sub-synchronous oscillation controller.
Described sub-synchronous oscillation suppresses system also to comprise: control device, during for having H bridge power unit to break down in described sub-synchronous oscillation controller, drives described shunting device to run to shunt fault current.
Pass through technique scheme, the utility model has following beneficial effect: the operation stability that improve sub-synchronous oscillation controller, effectively ensure that the sub-synchronous oscillation inhibition when H bridge power unit breaks down, and be conducive to the floor space reducing costs and reduce equipment simultaneously.
Other features and advantages of the utility model are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation of the system of carrying out sub-synchronous oscillation suppression in prior art;
Fig. 2 is the structural representation of the sub-synchronous oscillation controller of Y-connection;
Fig. 3 is the structural representation of the sub-synchronous oscillation controller that triangle connects;
Fig. 4 is the structural representation of Y chain link formula SVG;
Fig. 5 is the structural representation of the by-pass unit in embodiment one of the present utility model;
Fig. 6 is the high-order schematic diagram getting energy supply power mode in embodiment one of the present utility model;
Fig. 7 is the structural representation of the embodiment one BUCK circuit that this has;
Fig. 8 is the structural representation that in embodiment two of the present utility model, sub-synchronous oscillation suppresses system;
Fig. 9 is the current direction schematic diagram of H bridge power unit when normally running;
Figure 10 is the current direction schematic diagram of H bridge power unit when breaking down.
Description of reference numerals
1, H bridge power unit; 2, crow-bar protection circuit; 3, contactor; 4, storage capacitor; 5, chopper circuit; 6, main control unit; 7, Switching Power Supply; 8, thyristor trigger board.
11, generating set; 12, transformer; 13, electrical network; 14, string is mended; 15, sub-synchronous oscillation controller.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
Embodiment one
As shown in Figure 1, in electric power system, generating set 11 to electrical network 13 transmission of electric energy, is the loss reducing transmission line by transformer 12 and transmission line, the normal conveying capacity adopting the method increasing string benefit 14 to improve transmission line at present.But, this method increasing string benefit 14 also may cause sub-synchronous oscillation problem, generating set 11 is run with the frequency of oscillation lower than synchronizing frequency, has a strong impact on the fail safe of electric power system, therefore power plant employs a lot of device suppressing sub-synchronous oscillation, as sub-synchronous oscillation controller 15.
Equally as shown in Figure 1, the cardinal principle of employing sub-synchronous oscillation controller suppression sub-synchronous oscillation is: the tach signal being obtained generating set 11 by speed measuring device, control device generates the driving pulse for driving sub-synchronous oscillation controller 15 based on this tach signal, sub-synchronous oscillation controller 15 generates the electric current for suppressing sub-synchronous oscillation under the driving of driving pulse, and passes through transformer 12 by this pulse current injectingt in generating set 11 and electrical network 13.
Known, sub-synchronous oscillation controller is the core that whole sub-synchronous oscillation suppresses, and needs to ensure that it still can normally can run under fraction fault condition.And sub-synchronous oscillation controller develops on the basis of static reacance generator; therefore sub-synchronous oscillation controller generally includes several H bridge power units; H bridge power unit breaks down, one of major failure situation becoming sub-synchronous oscillation controller; thus the present embodiment is based on H bridge power unit, propose a kind of bypass protection scheme.For clearly describing the scheme of the present embodiment, first introduced the structure of the H bridge power unit in conventional sub-synchronous oscillation controller below by Fig. 2 to Fig. 4.
Usually, sub-synchronous oscillation controller can adopt star-like (as shown in Figure 2) or triangle (as shown in Figure 3) connected mode access electrical network, to electrical network Injection Current, or absorbs active current for the charging of its storage capacitor by electrical network.In Fig. 2 and Fig. 3, A, B, C represent three phase network, and H_A1 bridge-H_C6 bridge represents the H bridge power unit of H bridge construction, and Vdc_A1 to Vdc_C6 represents the magnitude of voltage on the storage capacitor that each H bridge power unit is corresponding.
In the present embodiment, described sub-synchronous oscillation controller preferably adopts chain type SVG, as shown in Figure 4, several H bridge power units (as shown in dotted outline in FIG.) that have often been in series of this chain type SVG, described H bridge power unit comprises four antiparallel switching device IGBT or IEGT, and each H bridge power unit is all parallel with a storage capacitor, namely the technical scheme proposed in the present embodiment is launch for the H bridge power unit of this structure.In addition, for coordinating the driving of respective switch device, can also be deploy switch power supply, expansion board etc. in H bridge power unit.
Based on the structure of above-mentioned H bridge power unit, as shown in Figure 5, present embodiments provide the by-pass unit of the H bridge power unit 1 in a kind of sub-synchronous oscillation controller, comprising: crow-bar protection circuit 2, it is in parallel with described H bridge power unit; And contactor 3; it is connected between two ac output ends of described H bridge power unit; for when H bridge power unit has fault; trigger corresponding crow-bar protection circuit; make electric current flow through the thyristor of crowbar unit inside, resistance and inductance, thus described crow-bar protection circuit is shunted fault current.
As shown in Figure 5; described crow-bar protection circuit preferably comprises thyristor, inductance and the resistance of connecting successively; the anode of described thyristor and one end of described resistance connect described H bridge power unit respectively, and the negative electrode of described thyristor is then connected by described inductance with the other end of described resistance.Described thyristor is preferably reverse-blocking tetrode thyristor device; thus described trigger triggers described crow-bar protection circuit; mainly namely thyristor is wherein triggered; according to the control principle of reverse-blocking tetrode thyristor device; for ease of realizing the control of trigger to gate circuit transistor gate; a thyristor trigger board can be set between contactor and thyristor, trigger described thyristor by this thyristor trigger board.
In addition, while crow-bar protection circuit operation, for assurance device still can normally run, do not affect other power cells, arrange contactor at AC, while crowbar action, contactor closes a floodgate, thus makes alternating current by other power cells.
It should be noted that, in order to can the annexation of the more clearly structure of by-pass unit and itself and H bridge power unit, Fig. 5 only illustrates with a H bridge power unit, the sub-synchronous oscillation controller architecture of corresponding diagram 2-Fig. 4 in reality, includes multiple by-pass unit of multiple H bridge power unit and correspondence.
Therefore, the by-pass unit that Fig. 5 illustrates combined with the sub-synchronous oscillation controller that Fig. 2-Fig. 4 illustrates, the present embodiment additionally provides a kind of shunting device of sub-synchronous oscillation controller, comprising: above-mentioned by-pass unit; Wherein, described by-pass unit is configured to identical with the H bridge power unit quantity in sub-synchronous oscillation controller, and each H bridge power unit correspondence electrical connection described by-pass unit.
In the present embodiment, H bridge power unit 1 is parallel with storage capacitor 4, and crow-bar protection circuit 2 described in this storage capacitor 4 and described contactor 3 are all in parallel, this storage capacitor 4 for obtaining electric energy from electrical network, and for powering to described by-pass unit.Sub-synchronous oscillation controller can absorb electric network active electric current and charge for this storage capacitor 4, and by-pass unit is then direct obtains power supply from storage capacitor 4, and this is that the high position for shunting device designed by the present embodiment gets can supply power mode.A described high position is got when can namely be and start and is charged to DC bus by electrical network, and this supply power mode is conducive to the validity ensureing by-pass unit.If do not utilize storage capacitor to power; but adopt the power supply such as supply module (as electric capacity) in by-pass unit self; then when H bridge power unit breaks down; crow-bar protection circuit runs; corresponding supply module repid discharge, may cause contactor power-off and cannot complete bypass commands.
A this high position gets the stability that energy supply power mode is conducive to ensureing shunting device; but; voltage on the storage capacitor of sub-synchronous oscillation controller DC side is generally the voltage of kilovolt; it can not be directly the crow-bar protection circuit supply of shunting device; therefore, design chopper circuit is also needed to provide suitable direct voltage for it.As shown in Figure 6; chopper circuit 5 is connected between described storage capacitor and described crow-bar protection circuit 2 and described contactor 3; for being the direct voltage of 110V by the convert of capacitor to voltage on described storage capacitor, and supply described crow-bar protection circuit and described trigger.In addition, described chopper circuit 5 is connected with a main control unit 6, and this main control unit 6 is for controlling the direct voltage of described chopper circuit 5 stable output.This main control unit 6 directly can adopt master control borad conventional in prior art, utilizes Closed-loop Control Strategy etc. to control the operation of chopper circuit 5.
In addition, the switching devices such as usual thyristor, IGBT are triggered by corresponding thyristor trigger board, and the operating voltage of master control borad, thyristor trigger board etc. is 24V, therefore in figure 6, the input of described chopper circuit connects described storage capacitor 4, first voltage output end and connects described contactor 3, second voltage output end and then connect a Switching Power Supply 7, the direct voltage of 110V is converted to the direct voltage of 24V by described Switching Power Supply 7, resupplies master control borad, thyristor trigger board etc.As shown in Figure 6, thyristor trigger board 8 is arranged on Switching Power Supply 7 and main control unit 6 on the path of crow-bar protection circuit supply, for triggering corresponding thyristor.In addition, described Switching Power Supply 7 directly can select the Switching Power Supply that H bridge power unit carries, and also can be set to independently Switching Power Supply.
In the present embodiment, described chopper circuit is voltage-dropping type chopper circuit, i.e. BUCK circuit, as shown in Figure 7, give the basic circuit diagram of BUCK circuit, the output valve of this BUCK circuit is always less than its input value, whether the circuit exported is continuous, depend on the size of inductance, electric capacity and switching frequency, adopt PI to control, the direct voltage of BUCK circuit stable output can be realized.
The bypass mode of the present embodiment improves the stability of sub-synchronous oscillation controller, plays a very good protection to generating set.
Embodiment two
On the basis of the shunting device of embodiment one, this gives a kind of sub-synchronous oscillation and suppress system, it shunting device comprising sub-synchronous oscillation controller and implement in one, this shunting device coordinates time same oscillating controller frequently application.In addition, also comprising: control device, during for having H bridge power unit to break down in described sub-synchronous oscillation controller, driving described shunting device to run to shunt fault current.
As shown in Figure 8, this sub-synchronous oscillation suppresses system to detect the tach signal of generating set by speed measuring device.Described control device, then according to the tach signal that described speed measuring device detects, generates the control command driving described sub-synchronous oscillation controller to run; Described sub-synchronous oscillation controller comprises several H bridge power units, produces for the control command according to described control device the electric current suppressed needed for sub-synchronous oscillation, and by this pulse current injectingt in generating set and electrical network.
In the present embodiment, described shunting device matches with described sub-synchronous oscillation controller, during for having H bridge power unit to break down in described sub-synchronous oscillation controller, under the control of described control device, shunts fault current.
The sub-synchronous oscillation controller related in the present embodiment and shunting device identical with embodiment one, be not repeated here.
When institute H bridge power unit normally works, electric current needed for described suppression sub-synchronous oscillation is by H bridge power unit, be injected in generating set and electrical network through transformer again, and when there being H bridge power unit to break down, electric current needed for described suppression sub-synchronous oscillation is injected in generating set and electrical network by the by-pass unit that the H bridge power unit that breaks down is corresponding, as shown in FIG. 9 and 10.The flow direction of the arrow signal electric current in Fig. 9 and Figure 10, in fig .9, when H bridge power unit normally works, electric current all flows through H bridge power unit, as in Figure 10, when H bridge power unit breaks down, H bridge power unit is bypassed, and electric current all flows through by-pass unit corresponding to trigger end.
By arranging corresponding by-pass unit to H bridge power unit, the system of the suppression sub-synchronous oscillation of the present embodiment, when there being H bridge power unit to break down, still can normally be run, and effectively ensure that the stability suppressing sub-synchronous oscillation.
Below preferred implementation of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection range of the present utility model.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different execution mode of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. a by-pass unit, this by-pass unit is the by-pass unit of the H bridge power unit (1) in sub-synchronous oscillation controller, it is characterized in that, comprising:
Crow-bar protection circuit (2), it is in parallel with described H bridge power unit (1); And
Contactor (3); it is connected between two ac output ends of described H bridge power unit (1); for when H bridge power unit (1) has fault; trigger corresponding crow-bar protection circuit (2), to make described crow-bar protection circuit (2), fault current is shunted.
2. by-pass unit according to claim 1; it is characterized in that; described crow-bar protection circuit (2) comprises thyristor, inductance and the resistance of connecting successively, and the anode of described thyristor and one end of described resistance connect one end of described H bridge power unit (1) respectively.
3. a shunting device, this shunting device is the shunting device of sub-synchronous oscillation controller, it is characterized in that, comprising:
By-pass unit described in several claims 1 or 2;
Wherein, described by-pass unit is configured to identical with H bridge power unit (1) quantity in sub-synchronous oscillation controller, and each H bridge power unit correspondence electrical connection described by-pass unit.
4. shunting device according to claim 3, it is characterized in that, each H bridge power unit (1) is parallel with a storage capacitor (4), this storage capacitor (4) for obtaining electric energy from electrical network, and for powering to described by-pass unit.
5. shunting device according to claim 4, it is characterized in that, chopper circuit (5) is connected with between described storage capacitor (4) and described by-pass unit, this chopper circuit (5) for being the direct voltage of 110V by the convert of capacitor to voltage on described storage capacitor (4), and supplies by-pass unit.
6. shunting device according to claim 5, it is characterized in that, described chopper circuit (5) is connected with a main control unit (6), and this main control unit (6) is for controlling the direct voltage of described chopper circuit (5) stable output.
7. shunting device according to claim 5, it is characterized in that, described chopper circuit (5) comprises two voltage output ends, and the first voltage output end connects described contactor (3), for providing the direct voltage of 110V to described contactor (3); Second voltage output end connects a Switching Power Supply (7), and the direct voltage of 110V is converted to the direct voltage of 24V by described Switching Power Supply (7).
8. shunting device according to claim 7; it is characterized in that; a thyristor trigger board (8) is connected with between described Switching Power Supply (7) and described crow-bar protection circuit (2); this thyristor trigger board (8) is for triggering the switching device work in described crow-bar protection circuit (2), and the direct voltage of 24V is supplied this thyristor trigger board (8) by described Switching Power Supply (7).
9. sub-synchronous oscillation suppresses a system, it is characterized in that, comprising:
Sub-synchronous oscillation controller; And
The shunting device of the sub-synchronous oscillation controller according to any one of claim 3 to 8.
10. sub-synchronous oscillation according to claim 9 suppresses system, it is characterized in that, also comprises:
Control device, when breaking down for there being H bridge power unit (1) in described sub-synchronous oscillation controller, drives described shunting device to run to shunt fault current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520662811.8U CN205017003U (en) | 2015-08-28 | 2015-08-28 | Bypass unit, shunting device and subsynchronous oscillation restrain system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520662811.8U CN205017003U (en) | 2015-08-28 | 2015-08-28 | Bypass unit, shunting device and subsynchronous oscillation restrain system |
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| CN205017003U true CN205017003U (en) | 2016-02-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186475A (en) * | 2015-08-28 | 2015-12-23 | 中国神华能源股份有限公司 | Bypass unit, bypass device and subsynchronous oscillation suppression system |
| US11217993B2 (en) | 2019-03-27 | 2022-01-04 | Delta Electronics (Shanghai) Co., Ltd | Conversion system with high voltage side and low voltage side |
| US11394292B2 (en) | 2019-03-27 | 2022-07-19 | Delta Electronics (Shanghai) Co., Ltd | Power unit |
-
2015
- 2015-08-28 CN CN201520662811.8U patent/CN205017003U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186475A (en) * | 2015-08-28 | 2015-12-23 | 中国神华能源股份有限公司 | Bypass unit, bypass device and subsynchronous oscillation suppression system |
| US11217993B2 (en) | 2019-03-27 | 2022-01-04 | Delta Electronics (Shanghai) Co., Ltd | Conversion system with high voltage side and low voltage side |
| US11394292B2 (en) | 2019-03-27 | 2022-07-19 | Delta Electronics (Shanghai) Co., Ltd | Power unit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Co-patentee after: BEIJING GUOHUA POWER Co.,Ltd. Patentee after: China Shenhua Energy Co.,Ltd. Co-patentee after: MONTNETS RONGXIN TECHNOLOGY GROUP CO.,LTD. Co-patentee after: Shenhua Guohua (Beijing) Electric Power Research Institute Co.,Ltd. Co-patentee after: INNER MONGOLIA GUOHUA HULUN BUIR POWER GENERATION Co.,Ltd. Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Co-patentee before: BEIJING GUOHUA POWER Co.,Ltd. Patentee before: China Shenhua Energy Co.,Ltd. Co-patentee before: RONGXIN POWER ELECTRONIC Co.,Ltd. Co-patentee before: Shenhua Guohua (Beijing) Electric Power Research Institute Co.,Ltd. Co-patentee before: INNER MONGOLIA GUOHUA HULUN BUIR POWER GENERATION Co.,Ltd. |
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Effective date of registration: 20190423 Address after: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Co-patentee after: BEIJING GUOHUA POWER Co.,Ltd. Patentee after: China Shenhua Energy Co.,Ltd. Co-patentee after: RONGXIN HUIKO ELECTRIC TECHNOLOGY Co.,Ltd. Co-patentee after: Shenhua Guohua (Beijing) Electric Power Research Institute Co.,Ltd. Co-patentee after: INNER MONGOLIA GUOHUA HULUN BUIR POWER GENERATION Co.,Ltd. Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Co-patentee before: BEIJING GUOHUA POWER Co.,Ltd. Patentee before: China Shenhua Energy Co.,Ltd. Co-patentee before: MONTNETS RONGXIN TECHNOLOGY GROUP CO.,LTD. Co-patentee before: Shenhua Guohua (Beijing) Electric Power Research Institute Co.,Ltd. Co-patentee before: INNER MONGOLIA GUOHUA HULUN BUIR POWER GENERATION Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee after: China Shenhua Energy Co.,Ltd. Patentee after: BEIJING GUOHUA POWER Co.,Ltd. Patentee after: Rongxin Huike Electric Co.,Ltd. Patentee after: Shenhua Guohua (Beijing) Electric Power Research Institute Co.,Ltd. Patentee after: INNER MONGOLIA GUOHUA HULUN BUIR POWER GENERATION Co.,Ltd. Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee before: China Shenhua Energy Co.,Ltd. Patentee before: BEIJING GUOHUA POWER Co.,Ltd. Patentee before: RONGXIN HUIKO ELECTRIC TECHNOLOGY Co.,Ltd. Patentee before: Shenhua Guohua (Beijing) Electric Power Research Institute Co.,Ltd. Patentee before: INNER MONGOLIA GUOHUA HULUN BUIR POWER GENERATION Co.,Ltd. |