CN102299506B - Protection system and method thereof for modular multi-level converter - Google Patents
Protection system and method thereof for modular multi-level converter Download PDFInfo
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- 230000000903 blocking effect Effects 0.000 claims description 28
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Abstract
The invention relates to a protection system and a method thereof for a modular multi-level converter. The converter comprises three phases and six bridge arms, wherein each bridge arm comprises a reactor and a submodule. According to the invention, an optical current transformer is arranged between connection of the reactors and the power grid; it is determined whether there is an over-current phenomenon by monitoring; if there is an over-current phenomenon, it is also determined whether temporary global interlocking or permanent global interlocking should be carried out. When there is an over-current fault at the one bridge arm, temporary global interlocking protection of the bridge arm is realized within 1.5 ms, so that damage that is caused by the over-current fault can be rapidly avoided by the submodule of the bridge arm. Besides, according to the invention, after 10ms when there is over-current temporary interlocking at the bridge arm, further protective motions of tripping and off-the-line operations of the system are completed, thereby protecting modular multi-level reliability and security in a flexible direct current power transmission system.
Description
Technical field:
The present invention relates to the power electronics direct current transportation field of electric power system, be specifically related to a kind of protection system and guard method thereof of modularization multi-level converter.
Background technology:
Flexible DC power transmission is to adopt direct current as a kind of new power transmission mode of intermediary, adopt modularization multi-level converter and advanced modulation technology to carry out direct current transportation, that the useful of AC network supplemented, can be when realizing electric power conveying, improve conveying capacity and the stability of existing AC transmission system, existing AC transmission system is used more effectively.
Modularization multi-level converter is composed in series by a plurality of submodules, and its submodule consists of by-pass switch, thyristor, IGBT, diode and electric capacity.Because in flexible DC power transmission system, each take the change of current brachium pontis that submodule that IGBT is core forms, fault current wish degree is little, and need to avoid the over-current protection malfunction causing under complex working condition in system running to do.
In conventional DC transmission system, converter valve fault current wish degree is larger; control the required reaction time requirement of protection system not strict; except the overcurrent protection of bottom thyristor device level; completion system overcurrent protection task focuses mostly on upper strata, and valve base electronic device does not generally possess brachium pontis current detecting and brachium pontis overcurrent protection function.Because modular multilevel formula flexible DC power transmission system is high to the requirement of real-time of brachium pontis overcurrent protection; therefore whole overcurrent protection function is dispersed and is configured in system control protection equipment, controls protection equipment lower floor equipment valve base control appliance complete the overcurrent protection task that requirement of real-time is high in system.Meanwhile, with brachium pontis overcurrent protection branch task state, replace conventional system protected mode.
Summary of the invention:
For the deficiencies in the prior art, the object of the present invention is to provide a kind of protection system and guard method thereof of modularization multi-level converter, realize and kept away fast the damage that over current fault causes.
The protection system of a kind of modularization multi-level converter provided by the invention, described protection system comprises submodule controller, valve base control appliance and the utmost point control system connecting successively; Its improvements are, described protection system is included between reactor in described converter and electrical network current transformer is set.
The protection system of the first preferred version provided by the invention, its improvements are, described valve base control appliance comprises main valve base control appliance and from valve base control appliance; Described utmost point control system comprises main pole control system and from utmost point control system;
Described main valve base control appliance and from valve base control appliance, described main pole control system with connect by optical fiber between utmost point control system; Described main valve base control appliance with from valve base control appliance, be connected with described submodule controller respectively;
Described converter comprises 3 phase 6 brachium pontis, and described brachium pontis comprises the submodule of reactor and series connection; Described reactor and the series connection of described submodule;
The submodule controller of described protection system is connected with the base stage of IGBT in the submodule of described converter.
The protection system of the second preferred version provided by the invention, its improvements are, described current transformer comprises current transformer (I, II);
Measure passage and be connected with described 6 brachium pontis respectively for 6 of described current transformer (I, II);
The digital output port of described current transformer (I, II) is connected from valve base control appliance with described with described main valve base control appliance respectively, and the analog output mouth of described current transformer (I, II) is connected from utmost point control system with described with described main pole control system respectively.
The protection system of the 3rd preferred version provided by the invention, its improvements are, described current transformer is optical current mutual inductor.
The present invention is based on the guard method of a kind of modularization multi-level converter as claimed in claim 1 that another object provides, its improvements are, described guard method comprises that brachium pontis overcurrent judges and brachium pontis overcurrent protection; Wherein said overcurrent refers to that the magnitude of current of arbitrary brachium pontis of 6 brachium pontis surpasses the 1.5Pu of rated current amount.
The guard method of the first preferred version provided by the invention, its improvements are, described brachium pontis overcurrent is judged and is comprised the steps:
(1) judging described main valve base control appliance and whether normal from communications status between valve base control appliance, is to carry out step (2), otherwise carries out step (3);
(2) described main valve base control appliance and simultaneously described 6 brachium pontis are carried out to over-current detection by corresponding optical current mutual inductor I and optical current mutual inductor II from valve base control appliance, when main valve base control appliance with from valve base control appliance, all do not detect over-current phenomenon avoidance, main valve base control appliance is not overcurrent of brachium pontis to brachium pontis overcurrent result of determination;
When main valve base control appliance with from valve base control appliance, at least one detects over-current phenomenon avoidance, and main valve base control appliance is brachium pontis overcurrent to brachium pontis overcurrent result of determination, and starts to carry out brachium pontis overcurrent protection action;
(3) described main valve base control appliance carries out over-current detection by current transformer I to described 6 brachium pontis, obtains final brachium pontis overcurrent result of determination.
The guard method of the second preferred version provided by the invention, its improvements are, described brachium pontis overcurrent protection comprises the steps:
1. described main valve base control appliance with from valve base control appliance, judge whether normal current transformer (I, II) communicates by letter; When 2. the communication 1. of described step is normal, according to the current value of described step (2), be weighted on average, repeat 6 times, obtain the brachium pontis magnitude of current;
3. described main valve base control appliance judges whether the described step brachium pontis magnitude of current 2. belongs to over-current phenomenon avoidance, carries out temporary transient overall locking processing, otherwise carry out step 4. if belong to over-current phenomenon avoidance;
4. described main valve base control appliance occurs that according to described step (2) and described step (3) result of determination of over-current phenomenon avoidance carries out described temporary transient overall locking and process, and according to described step (2) and described step (3), does not occur that the result of determination of over-current phenomenon avoidance carries out brachium pontis magnitude of current normal process;
5. carry out described temporary transient overall blocking time for continuing 10ms, carry out after temporary transient overall locking 10ms, main valve base control appliance is to temporary transient overall locking time counting number, and while not receiving the overall block signal that main pole control system issues, main valve base control appliance is carried out automatic unlocking and is also opened 100ms and countdown; If again there is over-current phenomenon avoidance after release in 100ms, main valve base control appliance sends permanent overall block signal, and main valve base control appliance sends emergency tripping operation request to main pole control system; If there is not over-current phenomenon avoidance after release in 100ms, system is recovered normal condition.
6. 4. whether described step judge when normal process current in described state and the described temporary transient overall blocking of countdowning:
If the state of countdowning finishes, main pole control system is by the zero clearing of described temporary transient overall locking number of times;
If, in described temporary transient overall blocking and not in the described state of countdowning, directly do not exit processing;
If not in the state of countdowning, but in described temporary transient overall blocking, enter the judgement whether described temporary transient overall blocking finishes;
The guard method of more preferably scheme provided by the invention, its improvements are, the judgement whether described temporary transient overall blocking finishes comprises:
If described temporary transient overall blocking does not finish directly to exit processing;
If described temporary transient overall blocking finishes and the current overall block signal of not receiving transmission, carry out release and open 100ms timing.
The guard method of another preferred version provided by the invention, its improvements are, and the IGBT that closes all submodules is processed in described temporary transient overall locking, and the temporary transient overall blocking duration is 10ms.
The guard method of a preferred version more provided by the invention, its improvements are, described in the state duration of countdowning be 100ms.
Term in the application " 6 brachium pontis " means 6 brachium pontis.
Compared with the prior art, beneficial effect of the present invention is:
1. this programme has proposed a kind of brachium pontis overcurrent protection implementation in modular multilevel formula flexible DC power transmission system, and system can, after there is brachium pontis over current fault, realize the temporary latch-up protection of brachium pontis in 1.5ms.Make brachium pontis submodule can keep away fast the damage causing because of over current fault.
2. branch's mode protected mode, reduces the impact of possible over-current protection malfunction.
3. system can complete further system tripping operation stoppage in transit protection action after there is the temporary locking 10ms of brachium pontis overcurrent, has protected the reliability and safety of modular multilevel in flexible DC power transmission system.
Accompanying drawing explanation
Fig. 1 is the system construction drawing of the many level of flexible DC power transmission system modular provided by the invention.
Fig. 2 is brachium pontis current measurement provided by the invention mechanism redundant configuration conceptual scheme.
Fig. 3 is brachium pontis overcurrent protection flow process provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Due to modular multilevel formula flexible DC power transmission system self-characteristic, under system generation DC bipolar short-circuit conditions, require brachium pontis at 1.5ms with the interior blocking that enters, otherwise will damage the devices such as IGBT of submodule inside.Deducting brachium pontis current acquisition and take time of data encoding form transmission is 0.2ms, submodule time of implementation and necessary reliable wish amount time are 0.5ms, controller will complete sampling filter and make fault verification in 0.8ms, then blocking order is handed down to each submodule on brachium pontis.For reducing the impact of possible over-current protection malfunction, require system when there is in short-term brachium pontis over current fault, by branch's protected mode, protect.After brachium pontis is carried out temporary block action brachium pontis submodule is protected; after recovering in short-term, can continue system over current fault release operation; if over current fault does not recover yet after locking in short-term; carry out further protection action; Permanent lockout and system trip and apply for, do not allow to occur twice because of the temporary locking of mistake of overcurrent generation in 100ms simultaneously.Thereby the protection misoperation causing while avoiding the recoverable over current fault of brachium pontis in short-term occurs.Therefore, require the defencive function task of whole control protection system heterarchical architecture to distribute rationally, valve base control appliance has high processing capability in real time and completes each protection action under brachium pontis overcurrent branch protected mode.
Fig. 1 is the system construction drawing of the many level of flexible DC power transmission system modular.Modular multilevel consists of 3 phase 6 brachium pontis, and each brachium pontis comprises the reactor of series connection successively and the submodule of at least one.Submodule comprises IGBT and diode antiparallel with it; The base stage of IGBT successively with submodule controller, valve base control appliance and utmost point control equipment connection.Utmost point control system issues control command to valve base control appliance, by valve base control appliance and submodule controller, controls opening and closure of IGBT.Wherein, on brachium pontis, each submodule is controlled by a sub-module controller.
Valve base control appliance comprises main valve base control appliance and from valve base control appliance; Utmost point control equipment comprises main pole control equipment and from utmost point control equipment; Main valve base control appliance and from valve base control appliance, main pole control equipment with connect by optical fiber between utmost point control equipment.
Based on this, the present embodiment arranges optical current mutual inductor I and II between brachium pontis reactor and electrical network junction.Measure passage and be connected with 6 brachium pontis respectively for 6 of current transformer I; Measure passage and be connected with 6 brachium pontis respectively for 6 of current transformer II;
Fig. 2 is brachium pontis current measurement mechanism redundant configuration conceptual scheme.The digital output port of optical current mutual inductor I is connected with main valve base control appliance, the analog output mouth of optical current mutual inductor I and main pole control equipment connection; The digital output port of optical current mutual inductor II with from valve base control appliance, be connected, the analog output mouth of optical current mutual inductor II with from utmost point control equipment connection.
The judgement of brachium pontis overcurrent and brachium pontis overcurrent protection in the guard method of the present embodiment are as follows:
The rule that under the two redundant states of brachium pontis optical current mutual inductor and valve base control appliance, valve base control appliance is judged brachium pontis overcurrent is as shown in the table.Overcurrent refers to that the magnitude of current of at least one brachium pontis in 6 brachium pontis surpasses the 1.5Pu of rated current amount.
Between principal and subordinate's valve base control appliance, there is real-time optical channel communication interaction.
Table 1. pair redundancy valve base control appliance is to brachium pontis overcurrent decision rule
Be described as follows:
(1) judging described main valve base control appliance and whether normal from communications status between valve base control appliance, is to carry out step (2), otherwise carries out step (3);
(2) described main valve base control appliance and simultaneously described 6 brachium pontis are carried out to over-current detection by corresponding optical current mutual inductor I and optical current mutual inductor II from valve base control appliance, when main valve base control appliance with from valve base control appliance, all do not detect over-current phenomenon avoidance, main valve base control appliance is not overcurrent of brachium pontis to brachium pontis overcurrent result of determination;
When main valve base control appliance with from valve base control appliance, at least one detects over-current phenomenon avoidance, and main valve base control appliance is brachium pontis overcurrent to brachium pontis overcurrent result of determination, and starts to carry out brachium pontis overcurrent protection action;
(3) described main valve base control appliance carries out over-current detection by current transformer I to described 6 brachium pontis, obtains final brachium pontis overcurrent result of determination.
Main valve base control appliance, according to brachium pontis overcurrent final decision result, carries out brachium pontis overcurrent protection, as shown in Figure 3, comprises the steps:
1. main valve base control appliance with from valve base control appliance, judge respectively whether optical current mutual inductor I communicates by letter with optical current mutual inductor II normal; Normally upgrade this road communication failure number of times of brachium pontis electric current real-time measurement values and subtract 1, and carry out step 2), if undesired Ze Jianggai road communication failure number of times adds 2;
When 2. step communication is 1. normal, according to the current value of step (2), be weighted on average, repeat 6 times, obtain the brachium pontis magnitude of current;
3. main valve base control appliance judges whether the described step brachium pontis magnitude of current 2. belongs to over-current phenomenon avoidance, carries out temporary transient overall locking processing, otherwise carry out step 4. if belong to over-current phenomenon avoidance; The IGBT that closes all submodules is processed in temporary transient overall locking, and its specific practice is the by-pass switch K closing in closed submodule.
4. main valve base control appliance carries out described temporary transient overall locking processing according to the result of the appearance over-current phenomenon avoidance of described step (2) and described step (3), according to the result that does not occur over-current phenomenon avoidance of described step (2) and described step (3), carries out brachium pontis magnitude of current normal process;
5. carry out described temporary transient overall blocking time for continuing 10ms, carry out after temporary transient overall locking 10ms, main valve base control appliance is to temporary transient overall locking time counting number, and while not receiving the overall block signal that main pole control system issues, main valve base control appliance is carried out automatic unlocking and is also opened 100ms and countdown; If again there is over-current phenomenon avoidance after release in 100ms, main valve base control appliance sends permanent overall block signal, and main valve base control appliance sends emergency tripping operation request to main pole control system; If there is not over-current phenomenon avoidance after release in 100ms, system is recovered normal condition.
6. 4. whether described step judge when normal process current in described state and the described temporary transient overall blocking of countdowning:
If 100ms countdowns, state finishes, and main pole control system is by the zero clearing of described temporary transient overall locking number of times;
If, in described temporary transient overall blocking and not in the described state of countdowning, directly do not exit processing;
If not in the state of countdowning, but in described temporary transient overall blocking, enter the judgement whether described temporary transient overall blocking finishes.
The judgement whether described temporary transient overall blocking finishes comprises:
If described temporary transient overall blocking does not finish directly to exit processing;
If described temporary transient overall blocking finishes and the current overall block signal of not receiving transmission, carry out release and open 100ms and countdown.
The optical current mutual inductor I of the present embodiment and the model of optical current mutual inductor II are NXCT35.
Finally should be noted that: in conjunction with above-described embodiment, only illustrate that technical scheme of the present invention is not intended to limit.Those of ordinary skill in the field are to be understood that: those skilled in the art can modify or be equal to replacement the specific embodiment of the present invention, but among the claim protection range that these modifications or change are all awaited the reply in application.
Claims (8)
1. a protection system for modularization multi-level converter, described protection system comprises submodule controller, valve base control appliance and the utmost point control system connecting successively; It is characterized in that, described protection system is included between reactor in described converter and electrical network current transformer is set;
Described valve base control appliance comprises main valve base control appliance and from valve base control appliance; Described utmost point control system comprises main pole control system and from utmost point control system;
Described main valve base control appliance and from valve base control appliance, described main pole control system with connect by optical fiber between utmost point control system; Described main valve base control appliance with from valve base control appliance, be connected with described submodule controller respectively;
Described converter comprises 3 phase 6 brachium pontis, and described brachium pontis comprises the submodule of reactor and series connection; Described reactor and the series connection of described submodule;
The submodule controller of described protection system is connected with the base stage of IGBT in the submodule of described converter;
Described current transformer comprises current transformer I, II;
Measure passage and be connected with described 6 brachium pontis respectively for 6 of described current transformer I, II;
The digital output port of described current transformer I, II is connected from valve base control appliance with described with described main valve base control appliance respectively, and the analog output mouth of described current transformer I, II is connected from utmost point control system with described with described main pole control system respectively.
2. protection system as claimed in claim 1, is characterized in that, described current transformer is optical current mutual inductor.
3. a guard method for modularization multi-level converter protection system as claimed in claim 1, is characterized in that, described guard method comprises the judgement of brachium pontis overcurrent and brachium pontis overcurrent protection; Wherein said overcurrent refers to that the magnitude of current of arbitrary brachium pontis of 6 brachium pontis surpasses the 1.5Pu of rated current amount.
4. guard method as claimed in claim 3, is characterized in that, described brachium pontis overcurrent judgement comprises the steps:
(1) judging described main valve base control appliance and whether normal from communications status between valve base control appliance, is to carry out step (2), otherwise carries out step (3);
(2) described main valve base control appliance and simultaneously described 6 brachium pontis are carried out to over-current detection by corresponding described current transformer I summation current transformer II from valve base control appliance, when main valve base control appliance with from valve base control appliance, all do not detect over-current phenomenon avoidance, main valve base control appliance is not overcurrent of brachium pontis to brachium pontis overcurrent result of determination;
When main valve base control appliance with from valve base control appliance, at least one detects over-current phenomenon avoidance, and main valve base control appliance is brachium pontis overcurrent to brachium pontis overcurrent result of determination, and starts to carry out brachium pontis overcurrent protection action;
(3) described main valve base control appliance carries out over-current detection by current transformer I to described 6 brachium pontis, obtains final brachium pontis overcurrent result of determination.
5. guard method as claimed in claim 4, is characterized in that, described brachium pontis overcurrent protection comprises the steps:
1. described main valve base control appliance with from valve base control appliance, judge whether current transformer I, II communicate by letter normal; When 2. the communication 1. of described step is normal, according to the current value of described step (2), be weighted on average, repeat 6 times, obtain the brachium pontis magnitude of current;
3. described main valve base control appliance judges whether the described step brachium pontis magnitude of current 2. belongs to over-current phenomenon avoidance, carries out temporary transient overall locking processing, otherwise carry out step 4. if belong to over-current phenomenon avoidance;
4. described main valve base control appliance occurs that according to described step (2) and described step (3) result of determination of over-current phenomenon avoidance carries out described temporary transient overall locking and process, and according to described step (2) and described step (3), does not occur that the result of determination of over-current phenomenon avoidance carries out brachium pontis magnitude of current normal process;
5. carry out described temporary transient overall blocking time for continuing 10ms, carry out after temporary transient overall locking 10ms, main valve base control appliance is to temporary transient overall locking time counting number, and while not receiving the overall block signal that main pole control system issues, main valve base control appliance is carried out automatic unlocking and is also opened 100ms and countdown; If again there is over-current phenomenon avoidance after release in 100ms, main valve base control appliance sends permanent overall block signal, and main valve base control appliance sends emergency tripping operation request to main pole control system;
6. 4. whether described step judge when normal process current in described state and the described temporary transient overall blocking of countdowning:
If the state of countdowning finishes, main pole control system is by the zero clearing of described temporary transient overall locking number of times;
If, in described temporary transient overall blocking and not in the described state of countdowning, directly do not exit processing;
If not in the state of countdowning, but in described temporary transient overall blocking, enter the judgement whether described temporary transient overall blocking finishes.
6. guard method as claimed in claim 5, is characterized in that, the judgement whether described temporary transient overall blocking finishes comprises:
If described temporary transient overall blocking does not finish directly to exit processing;
If described temporary transient overall blocking finishes and the current overall block signal of not receiving transmission, carry out release and open 100ms timing.
7. guard method as claimed in claim 5, is characterized in that, the IGBT that closes all submodules is processed in described temporary transient overall locking, and the temporary transient overall blocking duration is 10ms.
8. guard method as claimed in claim 5, is characterized in that, described in the state duration of countdowning be 100ms.
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| CN102867124B (en) * | 2012-09-12 | 2015-12-16 | 华北电力大学 | The computing method of a kind of MMC submodule redundant configuration and reliability |
| EP2747267B1 (en) | 2012-12-18 | 2020-02-05 | General Electric Technology GmbH | Electrical apparatus including chain-link converter and protection circuit |
| CN103280989B (en) * | 2013-05-15 | 2017-02-08 | 南京南瑞继保电气有限公司 | Current converter and control method thereof |
| CN103368197B (en) * | 2013-07-15 | 2015-11-25 | 国家电网公司 | The valve base control appliance of modularization multi-level converter and method |
| CN103715935B (en) * | 2013-11-27 | 2016-09-28 | 国家电网公司 | A kind of loss based on modular multilevel voltage source converter determines method |
| CN104092232B (en) * | 2014-06-26 | 2016-06-29 | 国家电网公司 | A kind of flexible direct current power transmission system electrical changing station automatic blocking method |
| CN105680421B (en) * | 2014-11-17 | 2018-06-08 | 南京南瑞继保电气有限公司 | A kind of modularization multi-level converter guard method |
| GB2550421A (en) * | 2016-05-20 | 2017-11-22 | General Electric Technology Gmbh | Control of voltage source converters |
| CN106505512B (en) * | 2016-12-07 | 2019-01-08 | 北京四方继保自动化股份有限公司 | Number is unlocked after soft straight control system temporary blocking again to overflow trip method |
| GB2566123B (en) * | 2016-12-07 | 2022-10-19 | Beijing Sifang Automation Co | Tripping method applicable to situation that number of unlocking times exceeds limit since flexible DC control system has been temporarily locked |
| CN107728508B (en) * | 2017-09-01 | 2019-11-01 | 中国南方电网有限责任公司电网技术研究中心 | A kind of control guard method of flexible direct current system and its control protective unit |
| CN108173235A (en) * | 2018-01-12 | 2018-06-15 | 许继电气股份有限公司 | A kind of flexible direct current transmission converter valve bridge arm Over Current Protection System |
| CN110212502B (en) * | 2019-06-20 | 2023-12-29 | 国网冀北电力有限公司检修分公司 | Converter valve protection method and system |
| CN110994558B (en) * | 2019-12-04 | 2022-03-29 | 南京南瑞继保电气有限公司 | Black module judgment processing method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3458795A (en) * | 1966-05-06 | 1969-07-29 | English Electric Co Ltd | Circuit for controlling the application of firing pulses to controlled devices in a static converter operating in the inversion mode |
| CN101542885A (en) * | 2007-05-14 | 2009-09-23 | Abb技术有限公司 | Redundant current valve control in a high voltage power transmission system |
| CN102130452A (en) * | 2011-03-16 | 2011-07-20 | 中国电力科学研究院 | Control system, valve base control equipment and submodule integration method |
-
2011
- 2011-08-24 CN CN201110243651.XA patent/CN102299506B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3458795A (en) * | 1966-05-06 | 1969-07-29 | English Electric Co Ltd | Circuit for controlling the application of firing pulses to controlled devices in a static converter operating in the inversion mode |
| CN101542885A (en) * | 2007-05-14 | 2009-09-23 | Abb技术有限公司 | Redundant current valve control in a high voltage power transmission system |
| CN102130452A (en) * | 2011-03-16 | 2011-07-20 | 中国电力科学研究院 | Control system, valve base control equipment and submodule integration method |
Non-Patent Citations (2)
| Title |
|---|
| 刘高原等.柔性直流换流站保护***的研究与分析.《华东电力》.2011,第39卷(第7期),第1141－1144页. |
| 柔性直流换流站保护***的研究与分析;刘高原等;《华东电力》;20110731;第39卷(第7期);第1141－1144页 * |
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