CN111371303B - Alternating current side starting loop with double circuit breakers at valve side of flexible direct engineering converter transformer - Google Patents
Alternating current side starting loop with double circuit breakers at valve side of flexible direct engineering converter transformer Download PDFInfo
- Publication number
- CN111371303B CN111371303B CN202010347853.8A CN202010347853A CN111371303B CN 111371303 B CN111371303 B CN 111371303B CN 202010347853 A CN202010347853 A CN 202010347853A CN 111371303 B CN111371303 B CN 111371303B
- Authority
- CN
- China
- Prior art keywords
- starting
- breaker
- valve
- circuit
- isolating switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Abstract
The invention relates to a starting loop used in a flexible direct-current engineering, in particular to an alternating-current side starting loop with a double-circuit breaker at the valve side of a converter transformer in the flexible direct-current engineering, wherein the valve side breaker and a double-grounding isolating switch are connected in series between the converter transformer and a valve hall, and a starting resistor branch in an original starting parallel loop is connected in series with a horizontal isolating switch, so that the double-circuit breaker wiring with the same electrical parameters is realized, the direct-current short-circuit current is effectively cut off in time, and the fault expansion is avoided; during normal operation, the starting circuit breaker does not have a starting resistor to operate any more, so that the problem of hidden danger of the starting resistor to operate is solved; in addition, the invention adopts the double-grounding isolating switch arranged between the double circuit breakers, provides corresponding isolating break points, can effectively consider the overhauling of the circuit breakers on two sides and the corresponding transformer or valve side bridge arm, greatly improves the overhauling safety and ensures the personal safety of overhaulers.
Description
Technical Field
The invention relates to an alternating current side starting loop in a soft-direct engineering, in particular to an alternating current side starting loop with double circuit breakers at the valve side of a converter transformer in the soft-direct engineering.
Background
In soft-direct engineering, the starting mode of the converter station is divided into alternating current side starting and direct current side starting. When the ac side is used for starting, the starting circuit may be provided on the ac grid side (hereinafter referred to as "grid side") of the converter transformer, or the starting circuit may be provided on the converter valve side (hereinafter referred to as "valve side") of the converter transformer. When the direct current short-circuit current of the flexible direct current engineering is smaller or the arrangement is limited, a converter transformer is required to be inserted into a valve hall for design, the network side starting is preferentially considered; when the current of the direct current breaker of the soft direct current engineering is larger, the design of disconnecting the converter transformer from the converter valve hall is considered so as to reduce the manufacturing difficulty of the converter transformer and improve the fire-fighting requirement, and the valve side starting is prioritized.
The starting circuit of the current converter transformer converter valve side comprises a starting circuit isolating switch, a starting circuit breaker and a starting resistor, wherein the starting resistor is connected with two sides of the starting circuit breaker in parallel.
And in the uncontrollable charging stage of the starting process, the converter valve is in a locking state, a starting loop breaker connected in parallel with a starting resistor is in an off state, the starting resistor is connected into a main loop to inhibit overcurrent in the charging process, the alternating current system is used for completing the capacitive charging of the converter valve submodule, when the capacitive voltage of the converter valve submodule rises to the ratio of the peak value of the alternating current line voltage at the valve side of the converter transformer to the total number of Shan Qiaobei submodules, the capacitive voltage rises to the maximum value, the charging current is turned off due to the clamping effect of the submodule capacitor, and the uncontrollable charging stage is ended. After the uncontrollable charging stage is finished, the controllable charging stage is started, at the moment, a starting circuit breaker connected with the starting resistor in parallel is closed, so that the starting resistor is bypassed, and then the converter valve is unlocked, and the normal operation stage is started.
The above-mentioned start-up loop has the following problems:
1) In the existing starting circuit, only a single breaker, namely a starting circuit breaker, is arranged, when the breaker fails, the breaker cannot trip, direct current short-circuit current needs to be cut off through a network side alternating current breaker, and in view of the fact that the network side alternating current breaker is insufficient in capability of cutting off direct current short-circuit current components, direct current short-circuit current can not be cut off, so that the system is unreliable in operation and insufficient in safety.
2) When the charging is finished and the normal working state is entered, the starting circuit breaker is in a closing state, the starting resistor is connected in parallel to the two sides of the starting circuit breaker, which is equivalent to the operation of the starting resistor with the breaker, when the circuit is in a short-circuit fault, the starting circuit breaker trips, but the circuit is not completely disconnected, and direct-current short-circuit current still passes through the starting resistor, so that the starting resistor is subjected to thermal shock, and the starting resistor is heated or even burnt, so that potential safety hazards exist.
3) When the converter valve/bridge arm reactor (valve side equipment) is overhauled, the alternating current side starting circuit breaker needs to be opened, but no corresponding isolating switch is arranged on the converter valve/bridge arm reactor side to form an obvious breakpoint, and a ground wire needs to be hung after a ground knife is closed, so that personal safety is difficult to ensure, and operation and maintenance are inconvenient.
Disclosure of Invention
The invention aims to provide an alternating current side starting circuit of a flexible direct engineering converter valve side variable-band double-circuit breaker, which can ensure the cut-off of direct current short-circuit current, ensure the safe and reliable operation of a system, effectively protect starting resistance and facilitate operation and maintenance.
The aim of the invention is achieved by the following ways:
the alternating current side starting circuit comprises a parallel circuit consisting of a starting circuit breaker and a starting resistor, and is characterized by further comprising a valve side breaker, a horizontal double-grounding isolating switch and a horizontal ungrounded isolating switch, wherein the horizontal ungrounded isolating switch is connected on a branch where the starting resistor is positioned and is connected in series with the starting resistor, and the valve side breaker and the horizontal double-grounding isolating switch are connected in series between the parallel circuit and converter transformer side equipment; the valve side breaker has the same electrical parameters as the starting circuit breaker; the valve side breaker is provided with a front ground disconnecting link close to the converter transformer side; a rear ground disconnecting link is arranged on the side, close to the converter valve, of the branch circuit where the starting circuit breaker is positioned;
in an uncontrollable charging stage in the starting process, a starting loop breaker is switched off, a horizontal ungrounded isolating switch, a valve side breaker and a horizontal double-grounded isolating switch are switched on, and electric energy flows sequentially through a converter transformer, transformer side equipment, the valve side breaker, the horizontal double-grounded isolating switch, the horizontal ungrounded isolating switch, a starting resistor and a valve side bridge arm reactor, and finally a converter valve is connected to complete capacitor charging of a converter valve submodule; when the capacitance voltage of the submodule of the converter valve rises to the ratio of the peak value of the alternating current line voltage at the valve side of the converter transformer to the total number of the Shan Qiaobei submodules, the capacitance voltage rises to the maximum value, the charging current is turned off due to the clamping effect of the capacitance of the submodule, the uncontrollable charging stage is ended, and the controllable charging stage is started;
in a controllable charging stage in a starting process, a starting loop breaker is switched on, a horizontal non-grounded isolating switch is pulled open under an equipotential state, a starting resistor is withdrawn, a valve side breaker and a horizontal double-grounded isolating switch are kept switched on, electric energy flows sequentially through a converter transformer, transformer side equipment, the valve side breaker, the horizontal double-grounded isolating switch, the starting loop breaker and a valve side bridge arm reactor, and finally a converter valve is accessed, so that the normal running state is achieved;
when the converter transformer or the valve side breaker is overhauled, the valve side breaker is opened, and in the horizontal double-grounding isolating switch: the main switch is opened, the side grounding switch close by the side breaker of the change valve and the side grounding switch close by the side breaker of the starting circuit breaker, and the front grounding switch close is ensured to have obvious break points, so that personal safety is ensured.
When the converter valve or the bridge arm reactor or the starting circuit breaker is overhauled, the starting circuit breaker is disconnected, and in the horizontal double-grounding isolating switch: the main knife switch is connected with the grounding knife switch on one side of the breaker on the side of the switching valve and is connected with the grounding knife switch on one side of the breaker on the side of the starting circuit; the rear ground disconnecting link of the branch where the loop breaker is positioned is started to be closed, so that obvious break points are ensured, and personal safety is ensured.
The invention adopts an alternating current side starting circuit with a double-circuit breaker structure, wherein a valve side breaker and a starting circuit breaker are arranged in the circuit, and the electrical parameters of the valve side breaker and the starting circuit breaker are completely consistent; the horizontal non-grounded isolating switch is connected in series on the starting resistor branch, and after the starting process is finished, the horizontal non-grounded isolating switch is disconnected in an equipotential state, so that the starting circuit breaker is ensured to operate without a starting resistor, and when any breaker fails during normal operation, the other breaker can be effectively tripped, so that the faults can be rapidly removed, and the safety of equipment such as a converter valve, a converter transformer and the like is ensured. On the other hand, under the normal running state, the starting resistor is out of operation, so that the potential safety hazard that the starting circuit breaker is tripped when faults occur in the wiring of the single circuit breaker, the circuit is not completely disconnected, and direct current short-circuit current still passes through the starting resistor to cause thermal shock to the starting resistor is avoided, and the potential safety hazard that the starting resistor possibly generates heat and even burns out is avoided. In the loop, a horizontal double-grounding isolating switch, a valve side breaker converter transformer side ground disconnecting switch, a starting loop breaker valve side ground disconnecting switch and the like are arranged, so that obvious breakpoints can be provided for maintenance, the safety of maintenance personnel is ensured, and the operation is convenient.
The invention may further be embodied as:
the circuit current measuring device is connected in series between the horizontal non-grounded isolating switch and the starting resistor on the branch where the starting resistor is located in the parallel circuit.
The loop current measuring device is used for measuring current parameters of a branch where the starting resistor is located in the starting process, so that the operation of the starting resistor and the horizontal ungrounded isolating switch is monitored and monitored.
In summary, the invention provides an alternating current side starting circuit with double circuit breakers at the valve side of a flexible direct engineering converter transformer, wherein the valve side circuit breakers and horizontal double-grounding isolating switches are connected in series between the converter transformer and a valve hall, and the starting resistor branch in the original starting parallel circuit is connected in series with the horizontal non-grounding isolating switches, so that the double circuit breaker wiring with the same electrical parameters is realized, the direct current short circuit current is ensured to be effectively cut off in time, and the fault expansion is avoided; during normal operation, the starting circuit breaker does not have a starting resistor to operate any more, so that the problem of hidden danger of the starting resistor to operate is solved; in addition, the horizontal double-grounding isolating switch is arranged between the double circuit breakers, so that corresponding isolating break points are provided, the overhauling of the circuit breakers on two sides and the corresponding transformer or valve side bridge arm can be effectively considered, the overhauling safety is greatly improved, and the personal safety of overhauling staff is ensured.
Drawings
FIG. 1 is a schematic circuit diagram of an AC side starting circuit of a soft-direct engineering converter transformer valve side with a double circuit breaker;
FIG. 2 is a schematic circuit diagram of the AC side startup circuit with double circuit breaker on the valve side during startup;
FIG. 3 is a schematic circuit diagram of the AC side startup circuit with double circuit breaker on the valve side in normal operating conditions;
FIG. 4 is a schematic diagram of the circuit wiring of the AC side startup circuit with double circuit breaker on the valve side when the converter transformer or the valve side circuit breaker is serviced;
fig. 5 is a schematic diagram of the circuit wiring of the ac side startup circuit with double circuit breaker on the valve side when the converter valve or startup circuit breaker is serviced.
The invention is further described below with reference to examples.
Detailed Description
Best mode for carrying out the invention:
referring to fig. 1, in this embodiment, taking a valve side as an example, an ac side starting circuit with a double circuit breaker on a valve side of a flexible direct engineering converter transformer includes a parallel circuit formed by a starting circuit breaker 20 and a starting resistor 19, a front ground disconnecting switch 14 arranged on the converter transformer side of the valve side breaker, a valve side breaker 15, a horizontal double ground disconnecting switch 16, a horizontal non-ground disconnecting switch 17, a loop current measuring device 18, a rear ground disconnecting switch 21 arranged on the converter valve side of the starting circuit breaker, wherein the horizontal non-ground disconnecting switch 17 and the loop current measuring device 18 are connected on a branch where the starting resistor 19 is located and are connected in series with the starting resistor 19, the valve side breaker 15 and the horizontal double ground disconnecting switch 16 are connected in series between a converter transformer side device and the parallel circuit, and the front ground disconnecting switch 14 is installed between the converter transformer side device and the valve side breaker 15; in the parallel circuit, a rear ground disconnecting link 21 is arranged on one side, close to a valve side bridge arm reactor 23, of a branch circuit where a starting circuit breaker 20 is positioned; the valve side breaker 15 has the same electrical parameters as the starting circuit breaker 20.
As shown in fig. 1, 11 is a converter transformer, and the converter transformer side device includes an AV arrester 12 and a voltage measuring device 13; the valve side equipment comprises a valve side bridge arm reactor 23 and a valve hall bridge arm wall bushing 24; the front ground disconnecting link 14 and the rear ground disconnecting link 21 are single-column vertical open type grounding switches; the horizontal double-grounding isolating switch 16 adopts a double-column horizontal telescopic double-grounding isolating switch; the horizontal non-grounded isolating switch 17 adopts a double-column horizontal telescopic non-grounded isolating switch.
The operation of the alternating current side starting loop of the double circuit breaker at the valve side of the flexible direct current engineering converter transformer is specifically as follows:
1) Starting a converter valve through an alternating current system to charge capacitance of a submodule of the converter valve, referring to fig. 2, the operation sequence is as follows: the method comprises the steps of preparing an alternating current system, charging a converter transformer in an idle load, switching on a horizontal ungrounded isolating switch 17, switching on a horizontal double-grounded isolating switch 16 and a valve side breaker 15, and completing the charging process of the alternating current system on a converter valve capacitor after 15-30 min, wherein the electric energy flow direction is as follows: communication system- > 11- > 12- > 13- > 15- > 16- > 17- > 18- > 19- > 22- > 23- > 24- > valve hall.
2) After the direct-current voltage of the converter valve is established, the converter valve enters a normal operation state, and reference is made to fig. 3. The operation sequence is as follows: starting circuit breaker 20 closing-horizontal ungrounded isolating switch 17 opening-entering into normal running state, the electric energy flow direction is: communication system- > 11- > 12- > 13- > 15- > 16- > 20- > 22- > 23- > 24- > valve hall.
3) Reference is made to fig. 4 for maintenance of a converter transformer or a valve side breaker. The operation sequence is as follows: the valve side breaker 15 is switched off, the horizontal double-grounding isolating switch 16 is switched off, meanwhile, the front ground disconnecting switch 14 is switched on, and the horizontal double-grounding isolating switch 16 is switched on close to the ground disconnecting switch on the valve side breaker 15 side, so that obvious break points are ensured, and personal safety is ensured.
4) Reference is made to fig. 5 for maintenance of a converter valve or a start-up circuit breaker. The operation sequence is as follows: the starting circuit breaker 20 is switched off, the horizontal double-grounding isolating switch 16 is switched off, meanwhile, the rear ground disconnecting switch 21 is switched on, and the horizontal double-grounding isolating switch 16 is switched on close to the ground disconnecting switch on the side of the starting circuit breaker 20, so that obvious break points are ensured, and personal safety is ensured.
In addition, the electrical parameters of the valve side breaker 15 and the starting circuit breaker 20 are completely consistent, when any breaker fails, the other breaker jumps, the fault is rapidly removed, and the safety of equipment such as a converter valve, a converter transformer and the like is ensured. After the charging process is finished, the horizontal isolating switch 17 is switched off in the equipotential state after the circuit breaker 20 is started, and the starting resistor is withdrawn, so that the electrical parameter characteristics of the valve side circuit breaker 15 and the starting circuit breaker 20 are ensured to be completely consistent.
The key points of the invention include:
1) The setting of double circuit breaker ensures on the one hand that direct current short-circuit current can in time effectively be cut off, and on the other hand can take into account the maintenance that two circuit breakers both sides set up, forms corresponding isolation breakpoint, overhauls the safety guarantee and promotes greatly.
2) The horizontal non-grounded isolating switch is connected in series before the starting resistor, the horizontal non-grounded isolating switch is pulled open by the equipotential after the starting process is finished, and the starting resistor is withdrawn from operation in normal operation, so that potential safety hazard problems are eliminated.
3) The alternating-current side starting loop is arranged on an outdoor site, and meanwhile, the converter transformer is prevented from being inserted into a valve hall, so that on one hand, the manufacturing difficulty of the converter transformer is reduced, and on the other hand, the fire-proof requirement of the valve hall is also facilitated.
The invention is not described in part as in the prior art.
Claims (2)
1. The alternating current side starting circuit with the double circuit breakers at the valve side of the flexible direct current engineering converter transformer comprises a parallel circuit formed by a starting circuit breaker and a starting resistor, and is characterized by further comprising the valve side circuit breaker, a horizontal double-grounding isolating switch and a horizontal ungrounded isolating switch, wherein the horizontal ungrounded isolating switch is connected on a branch where the starting resistor is positioned and is connected in series with the starting resistor, and the valve side circuit breaker and the horizontal double-grounding isolating switch are connected in series between the parallel circuit and converter transformer side equipment; the valve side breaker has the same electrical parameters as the starting circuit breaker; the valve side breaker is provided with a front ground disconnecting link close to the converter transformer side; a rear ground disconnecting link is arranged on the side, close to the converter valve, of the branch circuit where the starting circuit breaker is positioned;
in an uncontrollable charging stage in the starting process, a starting loop breaker is switched off, a horizontal ungrounded isolating switch, a valve side breaker and a horizontal double-grounded isolating switch are switched on, and electric energy flows sequentially through a converter transformer, transformer side equipment, the valve side breaker, the horizontal double-grounded isolating switch, the horizontal ungrounded isolating switch, a starting resistor and a valve side bridge arm reactor, and finally a converter valve is connected to complete capacitor charging of a converter valve submodule;
in a controllable charging stage in a starting process, a starting loop breaker is switched on, a horizontal non-grounded isolating switch is pulled open under an equipotential state, a starting resistor is withdrawn, a valve side breaker and a horizontal double-grounded isolating switch are kept switched on, electric energy flows sequentially through a converter transformer, transformer side equipment, the valve side breaker, the horizontal double-grounded isolating switch, the starting loop breaker and a valve side bridge arm reactor, and finally a converter valve is accessed, so that the normal running state is achieved;
when the converter transformer or the valve side breaker is overhauled, the valve side breaker is opened, and in the horizontal double-grounding isolating switch: the main disconnecting link is switched on by a grounding disconnecting link at one side of the switching valve side breaker and is switched on by a grounding disconnecting link at one side of the starting circuit breaker, and the front grounding disconnecting link is switched on;
when the converter valve or the bridge arm reactor or the starting circuit breaker is overhauled, the starting circuit breaker is disconnected, and in the horizontal double-grounding isolating switch: the main knife switch is connected with the grounding knife switch on one side of the breaker on the side of the switching valve and is connected with the grounding knife switch on one side of the breaker on the side of the starting circuit; and starting a rear ground disconnecting link of the branch circuit where the loop breaker is positioned to close.
2. The ac side starting circuit with double circuit breaker on the valve side of flexible direct engineering converter transformer according to claim 1, further comprising a circuit current measuring device connected in series between the horizontal non-grounded isolating switch and the starting resistor on the branch where the starting resistor is located in the parallel circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010347853.8A CN111371303B (en) | 2020-04-28 | 2020-04-28 | Alternating current side starting loop with double circuit breakers at valve side of flexible direct engineering converter transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010347853.8A CN111371303B (en) | 2020-04-28 | 2020-04-28 | Alternating current side starting loop with double circuit breakers at valve side of flexible direct engineering converter transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111371303A CN111371303A (en) | 2020-07-03 |
| CN111371303B true CN111371303B (en) | 2024-04-02 |
Family
ID=71209547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010347853.8A Active CN111371303B (en) | 2020-04-28 | 2020-04-28 | Alternating current side starting loop with double circuit breakers at valve side of flexible direct engineering converter transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111371303B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736924A (en) * | 2020-12-11 | 2021-04-30 | 深圳供电局有限公司 | Power transmission system |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08329799A (en) * | 1995-06-06 | 1996-12-13 | Fuji Electric Co Ltd | High speed vacuum dc circuit breaker |
| CN103606911A (en) * | 2013-10-12 | 2014-02-26 | 张家港智能电力研究院有限公司 | Method for removing instantaneous short circuit earth faults of direct current line of flexible direct current power transmission system |
| CN103972887A (en) * | 2014-05-19 | 2014-08-06 | 南京南瑞继保电气有限公司 | Unified power flow controller for double-circuit line |
| CN106571620A (en) * | 2016-10-12 | 2017-04-19 | 南方电网科学研究院有限责任公司 | DC line grounding short circuit fault determination method for double-end flexible DC power transmission system |
| CN109066600A (en) * | 2018-08-01 | 2018-12-21 | 四川大学 | A kind of current limliting capacitance-resistance branch, resistance-capacitance type dc circuit breaker and parameter selection method |
| CN109119975A (en) * | 2018-08-22 | 2019-01-01 | 许继集团有限公司 | A kind of failure protection method of the breaker of direct current system and its start-up course |
| CN109412127A (en) * | 2018-08-01 | 2019-03-01 | 四川大学 | A kind of current limliting capacitance-resistance branch, resistance-capacitance type dc circuit breaker and control strategy |
| CN110034575A (en) * | 2019-04-10 | 2019-07-19 | 中国能源建设集团广东省电力设计研究院有限公司 | Method for arranging suitable for extra-high voltage large capacity flexible direct current converter station starting-up later time |
| CN110247560A (en) * | 2019-07-10 | 2019-09-17 | 南方电网科学研究院有限责任公司 | A kind of flexible direct current converter station valve hall and converter valve wire inlet system |
| CN110492516A (en) * | 2019-07-29 | 2019-11-22 | 南方电网科学研究院有限责任公司 | A kind of extra-high voltage Multi-end flexible direct current transmission converter station system and its control method |
| CN209692629U (en) * | 2019-04-10 | 2019-11-26 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of arragement construction of extra-high voltage large capacity flexible direct current converter station starting-up later time |
| CN211720471U (en) * | 2020-04-28 | 2020-10-20 | 中国电建集团福建省电力勘测设计院有限公司 | Flexible direct current engineering alternating current side starting device with double circuit breakers on valve side of converter transformer |
-
2020
- 2020-04-28 CN CN202010347853.8A patent/CN111371303B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08329799A (en) * | 1995-06-06 | 1996-12-13 | Fuji Electric Co Ltd | High speed vacuum dc circuit breaker |
| CN103606911A (en) * | 2013-10-12 | 2014-02-26 | 张家港智能电力研究院有限公司 | Method for removing instantaneous short circuit earth faults of direct current line of flexible direct current power transmission system |
| CN103972887A (en) * | 2014-05-19 | 2014-08-06 | 南京南瑞继保电气有限公司 | Unified power flow controller for double-circuit line |
| WO2015176546A1 (en) * | 2014-05-19 | 2015-11-26 | 南京南瑞继保电气有限公司 | Unified power flow controller for double-circuit line |
| CN106571620A (en) * | 2016-10-12 | 2017-04-19 | 南方电网科学研究院有限责任公司 | DC line grounding short circuit fault determination method for double-end flexible DC power transmission system |
| CN109412127A (en) * | 2018-08-01 | 2019-03-01 | 四川大学 | A kind of current limliting capacitance-resistance branch, resistance-capacitance type dc circuit breaker and control strategy |
| CN109066600A (en) * | 2018-08-01 | 2018-12-21 | 四川大学 | A kind of current limliting capacitance-resistance branch, resistance-capacitance type dc circuit breaker and parameter selection method |
| CN109119975A (en) * | 2018-08-22 | 2019-01-01 | 许继集团有限公司 | A kind of failure protection method of the breaker of direct current system and its start-up course |
| CN110034575A (en) * | 2019-04-10 | 2019-07-19 | 中国能源建设集团广东省电力设计研究院有限公司 | Method for arranging suitable for extra-high voltage large capacity flexible direct current converter station starting-up later time |
| CN209692629U (en) * | 2019-04-10 | 2019-11-26 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of arragement construction of extra-high voltage large capacity flexible direct current converter station starting-up later time |
| CN110247560A (en) * | 2019-07-10 | 2019-09-17 | 南方电网科学研究院有限责任公司 | A kind of flexible direct current converter station valve hall and converter valve wire inlet system |
| CN110492516A (en) * | 2019-07-29 | 2019-11-22 | 南方电网科学研究院有限责任公司 | A kind of extra-high voltage Multi-end flexible direct current transmission converter station system and its control method |
| CN211720471U (en) * | 2020-04-28 | 2020-10-20 | 中国电建集团福建省电力勘测设计院有限公司 | Flexible direct current engineering alternating current side starting device with double circuit breakers on valve side of converter transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111371303A (en) | 2020-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103001195B (en) | The relay protecting method of failure in transformer dead zone and the circuit breaker tripping of fault side | |
| CN101227089B (en) | Discriminating and protecting method and apparatus for eliminating single phase ground fault by neutral point non-useful earthing electric network | |
| CN100546146C (en) | The harmonic elimination of neutral non-effective grounding electrical network, arc extinguishing method and comprehensive protector | |
| CN201146385Y (en) | Apparatus for discrimination and protection of eliminating single phase ground fault of neutral point non-useful earthing electric network | |
| CN103280782B (en) | The relay protecting method of failure in transformer dead zone excision | |
| CN103001196B (en) | The relay protecting method of excision failure in transformer dead zone | |
| CN105098748B (en) | A kind of Surge Protector and the method for lifting its temporary overvoltage tolerance | |
| CN101183788A (en) | Power network controlled reactance and small resistor combination type earthing device | |
| CN109950882B (en) | Small power supply grid-connected protection method | |
| CN108879645A (en) | A kind of arc suppression coil and pro-active intervention arc-extinction device paired running device and method | |
| CN111371303B (en) | Alternating current side starting loop with double circuit breakers at valve side of flexible direct engineering converter transformer | |
| CN211720471U (en) | Flexible direct current engineering alternating current side starting device with double circuit breakers on valve side of converter transformer | |
| CN110474288A (en) | Programmable microcomputer protecting device | |
| CN103346534B (en) | The relay protecting method that failure in transformer dead zone excises fast | |
| CN209046055U (en) | A kind of safety low-pressure comprehensive distribution box | |
| CN103618290A (en) | Transformer dead-zone fault relay protection method based on short-time open protection and sealed TAs | |
| CN206759031U (en) | A kind of improved power plant's low-voltage power supply system ground protection warning device | |
| CN113013857B (en) | 220kV inner bridge connection transformer substation circuit breaker failure relay protection method | |
| CN112117747B (en) | Ground fault current hybrid compensation system and matching method | |
| CN103762553A (en) | Relay protection method for accelerated removal of dead zone faults of transformer based on open positions of circuit breakers | |
| CN212210481U (en) | Distribution network initiative intervention type arc extinction device | |
| CN111477523B (en) | Inverter box transformer substation all-in-one machine and protection method thereof | |
| CN103618291A (en) | Transformer dead-zone fault relay protection method based on rapid removal and sealed TAs | |
| CN210693223U (en) | Voltage transformer isolation combination device applied to uninterrupted operation | |
| CN110970877B (en) | Safety protection method and device for live working of power distribution network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |