CN104332962A - Method for generating intelligent busbar differential protectors and corresponding intelligent interval protectors for substations - Google Patents
Method for generating intelligent busbar differential protectors and corresponding intelligent interval protectors for substations Download PDFInfo
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- CN104332962A CN104332962A CN201410636557.4A CN201410636557A CN104332962A CN 104332962 A CN104332962 A CN 104332962A CN 201410636557 A CN201410636557 A CN 201410636557A CN 104332962 A CN104332962 A CN 104332962A
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Abstract
The invention discloses a method for generating intelligent busbar differential protectors and corresponding intelligent interval protectors for substations. The method comprises controlling screen erection and powering on of novel busbar differential protectors, and dismounting original busbar difference devices based on the reserving of original busbar differential protector screens; placing busbar difference transition interface devices at the position, where the original busbar difference devices are mounted, and configuring the busbar difference transition interface devices; connecting the busbar difference transition interface devices with original repeat relays and with original breaker protectors and original breaker primary devices afterwards; controlling interval transformation; lapping the intervals with the novel busbar differential protectors. By the aid of the method, conventional busbar protectors and corresponding interval protectors can be changed into intelligent busbar protector and corresponding intelligent interval protectors safely.
Description
Technical field
The present invention relates to technical field of electric power, particularly relate to a kind of method that transformer station generates intelligent bus differential protection and the protection of intelligent interval.
Background technology
Electric power is the energy using electric energy as power.Electric power is invented in 19 century 70s, and the invention of electric power and application have started second time industrialization climax, and since becoming for 18th century, one of three scientific and technological revolutions that the world occurs, from then on science and technology changes the life of people more rapidly.The large-scale electrical power system that 20th century occurred is one of most important achievement in the human engineering history of science, the electrical production be made up of links such as generating, transmission of electricity, power transformation, distribution and electricity consumptions and consume system, natural primary energy is changed into electric power by mechanical energy device by it, then supplies power to each user through transmission of electricity, power transformation and distribution.Be the epoch of the Internet now, but let us still have the demand of sustainable growth to electric power, because we have invented the product of more use electric power such as computer, household electrical appliances.Undeniable, constantly the occurring of new technology makes electric power become the necessity of people.
Power transformation is an important step in electric power system, and the safe operation of power transformation relevant device in transformer station, the safe operation for transformer station and even electric power system is very important.At present, along with science and technology and economic sustainable development, the demand of industry-by-industry to electric power is increasing, also more and more higher to the security requirement of electric power system, and therefore, current each department transformer station just progressively carries out intellectualized reconstruction.In each intelligent substation transformation process, the intellectualized reconstruction of bus differential protection and the intellectualized reconstruction of corresponding interval protection are important parts.Before intellectualized reconstruction, the protective relaying devices such as bus differential protection and interval protection take cable as physical support, form secondary circuit by analog electric signal; After intellectualized reconstruction, protective relaying device will take optical cable as physical support, form secondary circuit by digital quantity network message.Due to different on loop realizes of conventional secondary device and intelligent secondary device, the compatibility issue producing conventional secondary device and intelligent secondary device on this public protective device of bus differential protection can be caused.
Therefore, at present, for the remodeling method that conventional bus differential protection and corresponding interval are protected, be only applicable to GPF (General Protection False transformation, cannot be applicable to transform intelligent bus differential protection and corresponding intelligent interval protection as by conventional bus differential protection and corresponding interval protection.
Summary of the invention
In view of this; the invention provides the method that transformer station generates intelligent bus differential protection and the protection of intelligent interval; in order to solve the compatibility issue of conventional secondary device and the intelligent secondary device produced on this public protective device of bus differential protection, can realize protecting Safe Transformation to be that intelligent bus differential protection and corresponding intelligent interval are protected by conventional bus differential protection and corresponding interval.
For achieving the above object, the invention provides following technical scheme:
Transformer station generates a method for intelligent bus differential protection and the protection of intelligent interval, comprising:
Control new bus differential protection to found screen and power on, on the basis retaining former differential relaying panel, remove former mother's difference device;
Mother's difference changeover joint device is placed on the position at place before described former mother's difference device is removed, configures described mother's difference changeover joint device;
Described mother's difference changeover joint device is first connected with original weight motor type relay, is then connected with former circuit breaker primary equipment with former breaker protection;
Control interval transforms;
After described interval has been transformed, described interval and described new bus differential protection are overlapped.
Preferably, before described configuration described mother's difference changeover joint device, also comprise:
Described mother's difference changeover joint device is connected with described new bus differential protection by optical fiber.
Preferably, described original weight motor type relay is arranged on described former differential relaying panel.
Preferably, also comprise before described control interval transformation:
Control opening into message point spread 1 times on described new bus differential protection.
Preferably, described control interval transformation comprises:
Carry out power failure transformation to described interval one by one successively, when determining that last described interval has been transformed, starting has a power failure to interval described in rear transforms.
Preferably, describedly carry out in power failure transformation process to interval one by one, power failure transformation carried out to a certain interval and comprises:
Inactive described new bus differential protection;
Remove the cable of former breaker protection extremely between described original weight motor type relay at described a certain interval;
Remove the cable of circuit breaker extremely between described heavy motor type relay at described a certain interval;
The new breaker protection at described a certain interval is connected with the network switch by optical fiber;
Exit the soft pressing plate of reception at described a certain interval on described new bus differential protection, exit the soft pressing plate of reception of described mother's difference changeover joint device on described new bus differential protection;
The circuit breaker intelligent terminal at described a certain interval is connected with described new bus differential protection by optical fiber.
Preferably, also comprise:
The interface carrying out described new bus differential protection and described a certain interval is tested, and when described interface success of the test, is put into operation at the described a certain interval after transformation.
Preferably, also comprise:
Remove the secondary circuit former differential relaying panel being transformed described interval, ensure to produce without parasitic loop.
Preferably, also comprise:
Remove the optical fiber between described mother's difference changeover joint device to switch.
Preferably, also comprise:
Remove described former differential relaying panel.
Known via above-mentioned technical scheme, compared with prior art, the invention provides a kind of method that transformer station generates intelligent bus differential protection and the protection of intelligent interval.Transformer station provided by the invention is adopted to generate the method for intelligent bus differential protection and the protection of intelligent interval, the compatibility issue of both secondary circuits at new bus differential protection and former protection interval is solved by utilizing female difference changeover joint device, concrete, technical scheme provided by the invention, control new bus differential protection to found screen and power on, on the basis retaining former differential relaying panel, remove former mother's difference device, mother's difference changeover joint device is placed on the position at place before described former mother's difference device is removed, configure described mother's difference changeover joint device, described mother's difference changeover joint device is first connected with original weight motor type relay, then be connected with former circuit breaker primary equipment with former breaker protection, control interval transforms, after described interval has been transformed, described interval and described new bus differential protection are overlapped.Therefore; technical scheme provided by the invention; effectively can solve the compatibility issue of both secondary circuits at new bus differential protection and former protection interval; namely realizing this public protective device of new bus differential protection can simultaneously compatible conventional secondary device and intelligent secondary device; the effective and reasonable utilization of described mother's difference changeover joint device, make technical scheme of the present invention can safe and applicable in transforming intelligent bus differential protection as by conventional bus differential protection and corresponding interval protection and corresponding intelligent interval is protected.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 generates the flow chart of the method for intelligent bus differential protection and the protection of intelligent interval for a kind of transformer station that the embodiment of the present invention provides;
Mother's difference changeover joint device that Fig. 2 provides for the embodiment of the present invention and new bus differential protection open ingress allocation plan;
Mother's difference changeover joint device that Fig. 3 provides for the embodiment of the present invention and new bus differential protection output Joint Enterprise figure;
Fig. 4 progressively to have a power failure the structure chart of transformation for transition stage interval that the embodiment of the present invention provides;
Fig. 5 for transformation that the embodiment of the present invention provides complete after new bus differential protection and new interval is protected and the structure chart of circuit breaker primary equipment.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
It should be noted that, technical scheme provided by the invention, mainly for 500 kv substations.
Embodiment
Refer to Fig. 1, Fig. 1 generates the flow chart of the method for intelligent bus differential protection and the protection of intelligent interval for a kind of transformer station that the embodiment of the present invention provides.As shown in Figure 1, the method comprises:
Step S101, controls new bus differential protection and founds screen and power on, and on the basis retaining former differential relaying panel, removes former mother's difference device;
Concrete, in order to coordinate transition stage mother difference to run, the loop scope that described step S101 removes is different from the scope that routine adaptations is removed.General former mother's difference loop is divided into device and exit relay, and both are all placed in the same face protection screen cabinet and carry out group screen, and device is responsible for logical operation and is judged whether outlet, and exit relay is responsible for heavily moving expanding node.In conventional substation bus differential protection transformation process, whole differential relaying panel need be removed, this way workload is large, and risk is high, and the present invention only carries out device dismounting.
Step S102, is placed on the position at place before described former mother's difference device is removed, configures described mother's difference changeover joint device by mother's difference changeover joint device;
Concrete, described mother's difference transition apparatus being placed on former screen position, being connected with former breaker protection and primary equipment by shielding interior former relay; such ratio is directly connected ratio with circuit breaker with breaker protection; greatly reduce workload, save cable, work of more removing provides safety guarantee.
Concrete, usual 500 kv substations have 6 string equipment, i.e. each mother's difference connection 6 limit circuit breakers, if do not used the heavy motor type relay of former screen position, described mother's difference transition apparatus need provide 12 pairs output node (female differential rise malfunctioning, close heavy each 6 secondary), 6 pairs open ingress (malfunctioning action) and 6 (8*2.5mm
2, namely every root includes 8 radiculas, and the cross-sectional area of each radicula is 2.5 square millimeters) and long cable carries out loop with each breaker protection and is connected, also need to provide 6 pairs to output node (tripping operation node) and 6 (8*2.5mm simultaneously
2) long cable once jumps circle with each circuit breaker and be connected.And adopting original weight motor type relay, original weight motor type relay has merge node effect, a small amount of stub cable only will need be provided to be responsible for described mother's difference transition apparatus and be connected with shielding heavy motor type relay.
Configure described mother's difference changeover joint device to comprise: configure described mother's difference changeover joint device and open ingress with new bus differential protection, and configure described mother's difference changeover joint device and femalely poorly output node with new.
Refer to Fig. 2, mother's difference changeover joint device that Fig. 2 provides for the embodiment of the present invention and new bus differential protection open ingress allocation plan.As shown in Figure 2; when confirming that new bus differential protection is outputed to described mother's difference changeover joint device (the female bus differential protection interface arrangement of the 500kV I namely in Fig. 2 B) by digital signal, described mother's difference changeover joint device outlet 1 ~ 6 can conjugate and heavy motor type relay action is correct.
Refer to Fig. 3, mother's difference changeover joint device that Fig. 3 provides for the embodiment of the present invention and new bus differential protection output Joint Enterprise figure.As shown in Figure 3; when confirming that heavy motor type relay analog signals is opened to mother's difference changeover joint device (the female bus differential protection interface arrangement of the 500kV I namely in Fig. 3 B), interface arrangement is malfunctioning to be left and to conjugate into 1-6 and newly bus differential protection correctly can receive intake.
Described mother's difference changeover joint device is responsible for the analog-to-digital conversion of intake and the amount of outputing, therefore configuration mode relates generally to the configuration of empty terminal, namely in described mother's difference changeover joint device, optical channel input and output node and relay is outputed out ingress one_to_one corresponding respectively.
Further, before described configuration described mother's difference changeover joint device, also comprise:
Described mother's difference changeover joint device is connected with described new bus differential protection by optical fiber.
Step S103, is first connected described mother's difference changeover joint device with original weight motor type relay, is then connected with former circuit breaker primary equipment with former breaker protection;
Concrete, described original weight motor type relay is arranged on described former differential relaying panel.
Step S104, the control interval transforms;
Further, described step S104 specifically comprises:
Carry out power failure transformation to described interval one by one successively, when determining that last described interval has been transformed, starting has a power failure to interval described in rear transforms.
Concrete, describedly carry out in power failure transformation process to interval one by one, power failure transformation is carried out to a certain interval and comprises:
Inactive described new bus differential protection;
Remove the cable of former breaker protection extremely between described original weight motor type relay at described a certain interval;
Remove the cable of circuit breaker extremely between described heavy motor type relay at described a certain interval;
The new breaker protection at described a certain interval is connected with the network switch by optical fiber;
Exit the soft pressing plate of reception at described a certain interval on described new bus differential protection, exit the soft pressing plate of reception of described mother's difference changeover joint device on described new bus differential protection;
The circuit breaker intelligent terminal at described a certain interval is connected with described new bus differential protection by optical fiber.
Further, describedly carry out in power failure transformation process to interval one by one, power failure transformation carried out to a certain interval and also comprises:
The interface carrying out described new bus differential protection and described a certain interval is tested, and when described interface success of the test, is put into operation at the described a certain interval after transformation.
Concrete, when bus differential protection has been transformed, after new bus differential protection (device) runs, namely transformation enters the transition stage that the old and new's equipment runs simultaneously.Refer to Fig. 4, Fig. 4 progressively to have a power failure the structure chart of transformation for transition stage interval that the embodiment of the present invention provides.
500 kilovolts of new bus differential protections, 500 kilovolts of bus differential protections (newly) namely in Fig. 4 and interval 1 circuit breaker intelligent terminal are connected (input and output, loop is directly jumped) by optical cable (optical fiber); 500 kilovolts of bus differential protections (newly) are connected (input and output, loop networking) with the network switch by optical cable.The network switch and interval 1 breaker protection (newly) (i.e. the new breaker protection in interval 1 mentioned above) are connected (input and output loop) by optical cable.Interval 1 circuit breaker intelligent terminal and interval 1 circuit breaker are connected (input and output loop) by cable.The network switch is connected (input and output loop) with mother's difference changeover joint device by optical cable.Female difference changeover joint device is connected by stub cable with original weight motor type relay.Interval 2 breaker protection (always), namely former interval 2 breaker protection, interval 2 circuit breaker, interval 3 breaker protection (always), interval 3 circuit breaker are connected (input and output loop) with original weight motor type relay respectively by cable.
For the first interval (hereinafter referred to as interval 1), transformation process is described in detail.
During the power failure transformation of interval 1, new bus differential protection of first stopping using, carries out peace and arranges the rear former breaker protection of removable spacer 1 respectively, interval 1 circuit breaker to the cable of original weight motor type relay, namely complete the permanent sequestration of former bus differential protection to interval 1 breaker protection after cable dismounting.After interval 1 completes transformation; new bus differential protection of again stopping using is completed the new breaker protection in interval 1 and is connected with the network switch by optical fiber; now exit the soft pressing plate of reception of interval 1, transition apparatus on new bus differential protection; interval 1 circuit breaker intelligent terminal is directly connected with new bus differential protection by optical fiber, can put into operation after testing in improved interval 1 by the interface carrying out new bus differential protection and interval 1 after having connected.
The secondary input and output loop of intelligent station is by network G OOSE (Generic Object Oriented Substation Event; transformer substation case towards general object) message connected by optical cable; can report GOOSE chain rupture as optical cable connects not general rule, GOOSE chain rupture will make protection reporting device alarm signal.For preventing transformation transition stage bus differential protection false alarms signal; after the new switch protection in the mother's difference number of converting to access interval 1; namely branch road 1 is malfunctioning open the access of (newly) soft message after; exit malfunctioning the opening of branch road 1 and receive soft pressing plate into (interface arrangement) GOOSE; again malfunctioning for former differential relaying panel interval 1 reception pressing plate is exited, arrive completely isolated object.
After interval 1 has been transformed; second interval (hereinafter referred to as interval 2) starts the transformation that has a power failure; this stylish bus differential protection and all the other former intervals still adopt conventional method to isolate; interval 1 adopts intelligent station to overhaul mechanism and isolation is moved back in the throwing of soft pressing plate; the bus differential protection being about to stop transport changes maintenance; exit simultaneously bus differential protection to interval 1 GOOSE network message send pressing plate isolate, reach the dual resisteance on soft message.Namely the pattern that can refer to interval 1 after having isolated is transformed interval 2.Follow-up to interval 3, the transformation at interval 4 and even last interval refers to said method.
It should be noted that, before described step S104, also comprise:
Control described new bus differential protection opens into message point spread 1 times, namely control changeover joint open into and control new protection open into, to guarantee that described in transition stage, new bus differential protection normally runs.
Step S105, after described interval has been transformed, has overlapped described interval and described new bus differential protection.
Further, after described step S105, also comprise:
Remove the secondary circuit former differential relaying panel being transformed described interval, ensure to produce without parasitic loop;
Remove the optical fiber between described mother's difference changeover joint device to switch;
Remove described former differential relaying panel.
Refer to Fig. 5, Fig. 5 for transformation that the embodiment of the present invention provides complete after new bus differential protection and new interval is protected and the structure chart of circuit breaker primary equipment.
500 kilovolts of new bus differential protections, namely 500 kilovolts of bus differential protections (newly) in Fig. 5 and interval 1 circuit breaker intelligent terminal, interval 2 circuit breaker intelligent terminal, interval 3 circuit breaker intelligent terminal are connected (input and output, loop is directly jumped) respectively by optical cable (optical fiber); 500 kilovolts of bus differential protections (newly) are connected (input and output, loop networking) with the network switch by optical cable.The network switch and interval 1 breaker protection (newly) (namely the new breaker protection in interval 1 mentioned above, lower same), interval 2 breaker protection (newly), interval 3 breaker protection (newly) are connected (input and output loop) by optical cable.Circuit breaker intelligent terminal interval circuit breaker corresponding thereto in each interval is connected (input and output loop) by cable.
Known via above-mentioned technical scheme, compared with prior art, the invention provides a kind of method that transformer station generates intelligent bus differential protection and the protection of intelligent interval.Transformer station provided by the invention is adopted to generate the method for intelligent bus differential protection and the protection of intelligent interval, the compatibility issue of both secondary circuits at new bus differential protection and former protection interval is solved by utilizing female difference changeover joint device, concrete, technical scheme provided by the invention, control new bus differential protection to found screen and power on, on the basis retaining former differential relaying panel, remove former mother's difference device, mother's difference changeover joint device is placed on the position at place before described former mother's difference device is removed, configure described mother's difference changeover joint device, described mother's difference changeover joint device is first connected with original weight motor type relay, then be connected with former circuit breaker primary equipment with former breaker protection, control interval transforms, after described interval has been transformed, described interval and described new bus differential protection are overlapped.Therefore; technical scheme provided by the invention; effectively can solve the compatibility issue of both secondary circuits at new bus differential protection and former protection interval; namely realizing this public protective device of new bus differential protection can simultaneously compatible conventional secondary device and intelligent secondary device; the effective and reasonable utilization of described mother's difference changeover joint device, make technical scheme of the present invention can safe and applicable in transforming intelligent bus differential protection as by conventional bus differential protection and corresponding interval protection and corresponding intelligent interval is protected.
Technical scheme provided by the invention, normal station intellectualized reconstruction bus differential protection device adopts Secure isolation measure in the configuration using method of female difference changeover joint device and O&M, can ensure the fail safe in transformation process.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For system disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. transformer station generates a method for intelligent bus differential protection and the protection of intelligent interval, it is characterized in that, comprising:
Control new bus differential protection to found screen and power on, on the basis retaining former differential relaying panel, remove former mother's difference device;
Mother's difference changeover joint device is placed on the position at place before described former mother's difference device is removed, configures described mother's difference changeover joint device;
Described mother's difference changeover joint device is first connected with original weight motor type relay, is then connected with former circuit breaker primary equipment with former breaker protection;
Control interval transforms;
After described interval has been transformed, described interval and described new bus differential protection are overlapped.
2. method according to claim 1, is characterized in that, before described configuration described mother's difference changeover joint device, also comprises:
Described mother's difference changeover joint device is connected with described new bus differential protection by optical fiber.
3. method according to claim 1, is characterized in that, described original weight motor type relay is arranged on described former differential relaying panel.
4. method according to claim 1, is characterized in that, also comprises before described control interval transformation:
Control opening into message point spread 1 times on described new bus differential protection.
5. method according to claim 1, is characterized in that, described control interval transformation comprises:
Carry out power failure transformation to described interval one by one successively, when determining that last described interval has been transformed, starting has a power failure to interval described in rear transforms.
6. method according to claim 5, is characterized in that, describedly carries out in power failure transformation process to interval one by one, carries out power failure transformation comprise a certain interval:
Inactive described new bus differential protection;
Remove the cable of former breaker protection extremely between described original weight motor type relay at described a certain interval;
Remove the cable of circuit breaker extremely between described heavy motor type relay at described a certain interval;
The new breaker protection at described a certain interval is connected with the network switch by optical fiber;
Exit the soft pressing plate of reception at described a certain interval on described new bus differential protection, exit the soft pressing plate of reception of described mother's difference changeover joint device on described new bus differential protection;
The circuit breaker intelligent terminal at described a certain interval is connected with described new bus differential protection by optical fiber.
7. method according to claim 6, is characterized in that, also comprises:
The interface carrying out described new bus differential protection and described a certain interval is tested, and when described interface success of the test, is put into operation at the described a certain interval after transformation.
8. method according to claim 1, is characterized in that, also comprises:
Remove the secondary circuit former differential relaying panel being transformed described interval, ensure to produce without parasitic loop.
9. method according to claim 1, is characterized in that, also comprises:
Remove the optical fiber between described mother's difference changeover joint device to switch.
10. method according to claim 9, is characterized in that, also comprises:
Remove described former differential relaying panel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410636557.4A CN104332962B (en) | 2014-11-06 | 2014-11-06 | The intelligent bus differential protection of transformer station's generation and the method for corresponding intelligent interval protection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410636557.4A CN104332962B (en) | 2014-11-06 | 2014-11-06 | The intelligent bus differential protection of transformer station's generation and the method for corresponding intelligent interval protection |
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| CN104332962B CN104332962B (en) | 2017-06-16 |
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Cited By (1)
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| CN104701985A (en) * | 2015-03-13 | 2015-06-10 | 南京南瑞继保电气有限公司 | Interface smooth transition method and interface smooth transition system in modifying process of transformer substation |
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| CN103746304A (en) * | 2013-12-25 | 2014-04-23 | 长园深瑞继保自动化有限公司 | Reconstruction method of intelligent transformer station |
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| CN103746304A (en) * | 2013-12-25 | 2014-04-23 | 长园深瑞继保自动化有限公司 | Reconstruction method of intelligent transformer station |
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| 郝伟等: "220kV母线保护智能化改造方案的探讨", 《山西电力》 * |
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| CN104701985A (en) * | 2015-03-13 | 2015-06-10 | 南京南瑞继保电气有限公司 | Interface smooth transition method and interface smooth transition system in modifying process of transformer substation |
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