CN215934457U - 3/2 failure protection device for non-full phase starting of wiring generator set and safe operation system - Google Patents
3/2 failure protection device for non-full phase starting of wiring generator set and safe operation system Download PDFInfo
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- CN215934457U CN215934457U CN202121688923.2U CN202121688923U CN215934457U CN 215934457 U CN215934457 U CN 215934457U CN 202121688923 U CN202121688923 U CN 202121688923U CN 215934457 U CN215934457 U CN 215934457U
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Abstract
The application discloses a 3/2 wiring generator set non-full-phase starting failure protection device and a safe operation system, wherein three protection outlets of a non-full-phase protection two in an RCS-974 non-electric quantity protection device are respectively connected with a starting failure of a side circuit breaker in a 3/2 wiring generator set, a starting failure of a middle circuit breaker and an opening and closing of a non-electric quantity 3 in a protection device, and the non-electric quantity 3 is used for controlling a trip I and a trip II of the side circuit breaker and a trip I and a trip II of the middle circuit breaker; the side breaker and the non-full-phase action contact of the middle breaker are connected in parallel and are used as a non-full-phase opening of the RCS-974 non-full-phase protection device. Through the protection device, the cost required by software upgrading of the RCS-985 power generation and transformation group power protection device can be saved, and two groups of non-full-phase contacts are not required to be combined by an extension relay and an auxiliary contact, so that the design cost of 3/2 wiring power generation and transformation group non-full-phase starting failure protection can be reduced, a protection loop is simplified to the greatest extent, and later maintenance is facilitated.
Description
Technical Field
The utility model relates to the technical field of power engineering, in particular to a non-full-phase starting failure protection device of an 3/2 wiring generator-transformer unit and a safe operation system of a generator set.
Background
At present, a power generation and transformation group of double bus connection and generator-transformer-line group connection adopts an RCS-974 non-electric quantity protection device to realize a non-full-phase starting failure protection function. Referring to fig. 1, fig. 1 is a logic diagram of a RCS-974 non-battery protection device in the prior art when non-full-phase start-up failure protection is implemented on a dual bus bar. The RCS-974 non-electric quantity protection device is provided with two different non-full-phase protection functions of a non-full-phase protection one and a non-full-phase protection two aiming at different requirements of double bus connection wires, generally only the non-full-phase protection one is needed, and the non-full-phase protection two is rarely used; therefore, the non-full-phase protection of the RCS-974 non-electric-quantity protection device only has three available outlets which respectively correspond to the trip I, the trip II and the starting failure of the circuit breaker.
Since 3/2 wiring requires simultaneous outlet-side and middle breakers, 6 synchronized protection outlets are required. If the RCS-974 non-battery protection device is to be used to implement non-full phase start-up failsafe for the 3/2 wiring generator set, modifications to the integrated circuit of the RCS-974 non-battery protection device outlet board are typically required. Such as: and the protection outlet of the non-full-phase protection II of the RCS-974 non-electric quantity protection device is changed to the non-full-phase protection I, so that the non-full-phase protection I of the RCS-974 non-electric quantity protection device has 6 protection outlets. However, this modification requires a new custom outlet plate, which is expensive.
Therefore, in the prior art, the non-full phase start failure protection of the 3/2 wiring generator set is generally realized by software upgrading of the RCS-985 generator set power protection and modification of a hardware loop. Because the RCS-985 power generation and transformation group power protection is in double-set configuration, the requirement of non-full-phase protection is that a doubling condition is required, namely, one set of protection outlets of the RCS-985 power generation and transformation group power protection respectively correspond to the tripping I and the starting failure of the side circuit breaker and the middle circuit breaker, and the other set of protection outlets respectively correspond to the tripping II and the starting failure of the side circuit breaker and the middle circuit breaker. In practical application, because the non-full-phase protection of the circuit breaker body is in single-phase configuration, the non-full-phase action contact of the circuit breaker body does not have a dualization condition, so that the number of protection outlets of the circuit breaker body needs to be increased by using an extension relay; the other solution is to use the auxiliary contacts of two circuit breakers to combine two groups of non-full-phase contacts without using the non-full-phase protection action contacts of the circuit breaker body, and simultaneously consider the time matching of the non-full-phase action of the circuit breaker body when setting the protection fixed value of the RCS-985 generator-transformer group electric quantity protection device. Obviously, whether an extended relay is added or an auxiliary contact is used for combining two groups of non-full-phase contacts, the method for starting failure of 3/2 wiring generator set non-full-phase protection is realized by upgrading software for RCS-985 generator set power protection, and not only is the manufacturing cost high, but also the protection loop is too complex. At present, no effective solution for the technical problem exists.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a non-full-phase startup failure protection device for 3/2 wiring generator sets and a safe operation system for a generator set, so as to reduce the design cost of performing non-full-phase startup failure protection on 3/2 wiring generator sets and also reduce the complexity of protection loops. The specific scheme is as follows:
a3/2 wiring transformation group non-full-phase starting failure protection device is characterized in that a first protection outlet, a second protection outlet and a third protection outlet of a non-full-phase protection second in an RCS-974 non-electric quantity protection device are respectively connected with a starting failure of a side circuit breaker in a 3/2 wiring transformation group, a starting failure of a middle circuit breaker and an opening and closing of a non-electric quantity 3 in the RCS-974 non-electric quantity protection device, and the non-electric quantity 3 is made to control a jump I and a jump II of the side circuit breaker and a jump I and a jump II of the middle circuit breaker; and the side circuit breaker is connected with a non-full-phase action contact of the middle circuit breaker in parallel and is used as a non-full-phase opening of the RCS-974 non-electric quantity protection device.
Preferably, the first protection outlet, the second protection outlet and the third protection outlet are led out through a terminal wiring row.
Preferably, the delay time of the non-battery level 3 is 0.
Preferably, the method further comprises the following steps:
and the alarm is used for prompting the early warning information when the generator-transformer set starts tripping.
Preferably, the starting failure of the side circuit breaker, the starting failure of the middle circuit breaker and the opening of the non-electric quantity 3 are respectively connected with the first protection outlet, the second protection outlet and the third protection outlet in a mode of pressing plate wiring.
Correspondingly, the utility model also discloses a safe operation system of the generator set, which comprises the 3/2 wiring generator set non-full-phase starting failure protection device disclosed in the foregoing.
It can be seen that, in the utility model, firstly, a first protection outlet, a second protection outlet and a third protection outlet which correspond to a non-full-phase protection two-phase in an RCS-974 non-electricity-quantity protection device are respectively connected with the start failure of a side circuit breaker and the start failure of an interrupt circuit breaker in an 3/2 wiring transformation group and the start failure of a non-electricity quantity 3 in the RCS-974 non-electricity-quantity protection device, and the non-electricity quantity 3 is used for controlling the jump I and the jump II of the side circuit breaker and the jump I and the jump II of the middle circuit breaker. Meanwhile, the non-full-phase action contacts of the side circuit breaker and the middle circuit breaker are connected in parallel to be used as the non-full-phase opening of the RCS-974 non-electric quantity protection device, so that the non-full-phase starting failure protection of the 3/2 wiring generator-transformer group can be realized. Obviously, compared with the prior art, the arrangement mode can not only save the cost for upgrading the software of the RCS-985 power generation and transformation group power protection device, but also does not need to expand the relay and the auxiliary contact to combine two groups of non-full-phase contacts, so that the design cost of 3/2 wiring power generation and transformation group non-full-phase starting failure protection can be reduced, the protection loop can be simplified to the greatest extent, and the later maintenance is more convenient. Correspondingly, the safe operation system of the generator set provided by the application also has the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a logic diagram of a prior art RCS-974 non-battery protection device for non-full phase start-up failure protection of dual bus lines;
FIG. 2 is a block diagram of a 3/2 wiring generator set non-full phase start fault protection device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the parallel connection of the non-all-phase operating contacts of the middle breaker and the side breaker;
FIG. 4 is a schematic view of a terminal block provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of the connection of each protection outlet of the RCS-974 non-charge protection device to the side and center circuit breakers via the clamp plate connections provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of the RCS-974 non-electric quantity protection device when tripping is performed by triggering the trip I and the trip II of the side circuit breaker and the trip I and the trip II of the middle circuit breaker by using the third protection outlet of the non-full-phase protection two;
fig. 7 is a schematic diagram of the protection logic of the RCS-974 non-battery protection device for the 3/2 wiring generator set non-full phase start failure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a structural diagram of a non-full-phase start failure protection device of an 3/2 wiring transformer set according to an embodiment of the present invention, where the device includes: a first protection outlet, a second protection outlet and a third protection outlet of a non-full-phase protection second in the RCS-974 non-electric-quantity protection device are respectively connected with the start failure of a side circuit breaker in the 3/2 wiring generation group, the start failure of a middle circuit breaker and the start-in of a non-electric quantity 3 in the RCS-974 non-electric-quantity protection device, and the non-electric quantity 3 is used for controlling the jump I and the jump II of the side circuit breaker and the jump I and the jump II of the middle circuit breaker; the side breaker and the non-full phase action contact of the middle breaker are connected in parallel and are used as the non-full phase opening of the RCS-974 non-electric quantity protection device.
In the embodiment, the protection device for the 3/2 wiring transformer group with the non-full-phase startup failure is provided, so that the design cost for performing the non-full-phase startup failure protection on the 3/2 wiring transformer group can be reduced, and the complexity of a protection loop can be reduced. In the protection device, the tripping I, the tripping II and the tripping failure of the side circuit breaker and the middle circuit breaker in the 3/2 wiring generating and transforming group need to be grouped in advance, namely, the tripping I of the side circuit breaker and the tripping II of the middle circuit breaker need to be divided into a first group of outlet loops in advance, and the tripping I and the tripping II of the side circuit breaker, the tripping II of the middle circuit breaker need to be divided into a second group of outlet loops. Wherein the first set of outlet loops are non-power protected and the second set of outlet loops may be implemented with non-power protected trip extension outlets.
Specifically, in this embodiment, first, a first protection outlet, a second protection outlet, and a third protection outlet corresponding to the second non-full-phase protection in the RCS-974 non-electric-quantity protection device are respectively connected to the start failure of the side circuit breaker, the start failure of the middle circuit breaker, and the start failure of the non-electric-quantity 3 in the RCS-974 non-electric-quantity protection device in the 3/2 connection switching group, and the non-electric-quantity 3 is made to control the first trip i, the second trip ii, and the first trip i, and the second trip ii of the side circuit breaker. By the arrangement mode, the RCS-974 non-electric quantity protection device can control the jump I and the jump II in the side circuit breaker and the middle circuit breaker; and finally, connecting the non-full-phase action contacts of the side circuit breaker and the middle circuit breaker in the 3/2 wiring generator-transformer group in parallel, and opening the non-full-phase action contacts as a non-full-phase protection device of the RCS-974. Referring to fig. 3, fig. 3 is a schematic diagram illustrating the parallel connection of the non-all-phase operating contacts of the middle circuit breaker and the side circuit breaker. When the non-full-phase action contacts of the side circuit breaker and the middle circuit breaker are connected in parallel and are used as the non-full-phase opening of the RCS-974 non-electric-quantity protection device, the RCS-974 non-electric-quantity protection device can realize the non-full-phase failure protection of the 3/2 wiring generator set.
The working principle of the RCS-974 non-electric quantity protection device for performing non-full-phase starting failure protection on the 3/2 wiring generator-transformer set is as follows: when the generator-transformer group operates normally and the side breaker and the middle breaker in 3/2 wiring operate simultaneously, if one breaker operates in a non-full phase mode and the body non-full phase protection action fails to trip the breaker, the non-full phase action contact of the breaker body starts the non-full phase opening of the generator-transformer group non-full phase protection. Because the double circuit breakers operate, one phase of the circuit breaker in open-phase operation has no current, so that the current of the other circuit breaker corresponding to the phase is increased, and the generator-transformer set does not actually operate in a non-full phase. In this case, the current element of the non-full-phase protection is not started, and the non-full-phase protection does not act; when a bus or a line is overhauled, the generator-transformer unit single circuit breaker operates, if the circuit breaker has non-full-phase and body non-full-phase actions, the circuit breaker is tripped successfully, the non-full-phase protection current element is started correctly, the generator-transformer unit non-full-phase protection is opened through a non-full-phase action contact of the circuit breaker body, a tripping instruction is opened through setting delay, and the circuit breaker is started for failure protection.
The 3/2 wiring generator set non-full-phase starting failure protection device provided by the embodiment saves the cost for software upgrading of the RCS-985 generator set power protection device on one hand, and does not need to expand a relay and an auxiliary contact to combine two groups of non-full-phase contacts on the other hand. This not only reduces the cost of the 3/2 tap changer set for non-full phase start-up failure protection, but also significantly reduces the complexity of the structure of the 3/2 tap changer set for non-full phase start-up failure protection.
It can be seen that, in this embodiment, first, the first protection outlet, the second protection outlet, and the third protection outlet, which correspond to the non-full-phase protection two-phase, in the RCS-974 non-electricity-quantity protection device, are respectively connected to the start-up failure of the side circuit breaker, the start-up failure of the interrupt circuit breaker, and the start-up failure of the non-electricity-quantity 3 in the RCS-974 non-electricity-quantity protection device, and the non-electricity-quantity 3 is made to control the trip i and the trip ii of the side circuit breaker and the trip i and the trip ii of the middle circuit breaker. Meanwhile, the non-full-phase action contacts of the side circuit breaker and the middle circuit breaker are connected in parallel to be used as the non-full-phase opening of the RCS-974 non-electric quantity protection device, so that the non-full-phase starting failure protection of the 3/2 wiring generator-transformer group can be realized. Obviously, compared with the prior art, the arrangement mode can not only save the cost for upgrading the software of the RCS-985 power generation and transformation group power protection device, but also does not need to expand the relay and the auxiliary contact to combine two groups of non-full-phase contacts, so that the design cost of 3/2 wiring power generation and transformation group non-full-phase starting failure protection can be reduced, the protection loop can be simplified to the greatest extent, and the later maintenance is more convenient.
Based on the above embodiments, this embodiment further describes and optimizes the technical solution, and as a preferred implementation, the first protection outlet, the second protection outlet, and the third protection outlet are led out through the terminal strip.
In practical application, the first protection outlet, the second protection outlet and the third protection outlet which correspond to the RCS-974 non-full-phase protection device can be led out by using the terminal wiring bank. Referring to fig. 4, fig. 4 is a schematic diagram of a terminal block according to an embodiment of the present invention. Wherein, 7ID and 7ZD are original terminal connecting bars in the generator-transformer group cabinet, 7FD is a newly-added terminal connecting bar, 7ID is a current terminal, and a current cable is laid from the generator-transformer group A cabinet to lead in the main transformer bushing current; the 7ZD is the non-electric quantity open terminal, and the non-full phase contact that lays a control cable and introduce the good parallel connection from the booster station circuit breaker terminal box inserts non-full phase position open terminal 7ZD4 and 7ZD9, and the RSC-974 non-electric quantity protection device is the third protection export of non-full phase protection second and is introduced the open terminal 7ZD5 and 7ZD8 of non-electric quantity 3. 7FD is a special outlet terminal row of the non-full-phase protection two, and three protection outlets of the non-full-phase protection two can be led out.
Based on the above embodiments, this embodiment further describes and optimizes the technical solution, and as a preferred implementation, the start-up failure of the side breaker, the start-up failure of the interrupter, and the opening of the non-electric quantity 3 are respectively connected to the first protection outlet, the second protection outlet, and the third protection outlet by means of the connection of the pressing plate.
In the embodiment, the starting failure of the side circuit breaker, the starting failure of the interrupt circuit breaker and the opening of the non-electric quantity 3 are respectively connected with the first protection outlet, the second protection outlet and the third protection outlet of the RSC-974 non-electric quantity protection device in a mode of pressing plate wiring. Referring to fig. 5, fig. 5 is a schematic diagram illustrating connection between each protection outlet of the RCS-974 non-electrical-quantity protection device and the side circuit breaker and the middle circuit breaker through the pressing plate connection according to the embodiment of the present invention. As can be seen from fig. 5, in this embodiment, the first protection outlet of the RCS-974 non-full-phase protection two (FQX2) is connected to the start failure of the side circuit breaker, the second protection outlet is connected to the start failure of the middle circuit breaker, the third protection outlet is connected to the open-in of the non-electric quantity 3 in the RCS-974 non-electric-quantity protection device, and the RSC-974 non-electric-quantity protection device can control the trip i and the trip ii of the side circuit breaker and the trip i and the trip ii of the middle circuit breaker through the non-electric quantity 3.
That is, the non-electric quantity 3 of the RCS-974 non-electric quantity protection device enters the third protection outlet, and the non-electric quantity tripping is started through the non-electric quantity tripping pressure plate controller, so that the extension of the RCS-974 non-electric quantity protection device protection outlet is realized. Referring to fig. 6, fig. 6 is a schematic diagram of the RCS-974 non-electric quantity protection device triggering tripping operation of the trip i and trip ii of the side circuit breaker and the middle circuit breaker by using the third protection outlet of the non-full-phase protection two. The trip outlet group is an outlet mode which is defined in advance after uniformly editing a non-electric quantity protection outlet loop in the RCS-974 non-electric quantity protection device.
Based on the above embodiments, this embodiment further describes and optimizes the technical solution, and as a preferred implementation, the delay time of the non-electrical quantity 3 is 0.
Specifically, the delay of the protection fixed value non-electric quantity 3 in the RCS-974 non-electric quantity protection device can be set to be zero, because the tripping action of the side circuit breaker and the middle circuit breaker can be more rapid and timely through the setting mode, and therefore the overall reliability of the 3/2 wiring generator-transformer set in the operation process can be further improved. Referring to table 1, table 1 shows setting data of a protection constant value and a control word in the RCS-974 non-battery protection device.
By setting the protection fixed value and the control word in the RCS-974 non-electric quantity protection device, the RSC-974 non-electric quantity protection device can carry out non-full-phase starting failure protection on the 3/2 wiring generator set. Referring to fig. 7, fig. 7 is a logic diagram illustrating the protection logic of the RCS-974 non-battery protection device for the non-full phase start failure of the 3/2 wiring generator set.
Based on the above embodiment, this embodiment further describes and optimizes the technical solution, and as a preferred implementation, the non-full-phase start failure protection device further includes:
and the alarm is used for prompting the early warning information when the generator-transformer set starts tripping.
In practical application, when the generator-transformer set starts tripping, the alarm can be used for prompting the early warning information. It can be thought that if the generator-transformer group starts tripping, it indicates that the circuit in the generator-transformer group is abnormal or failed, in this case, if the alarm prompts the early warning information, not only can the staff know the operation state of the generator-transformer group at the first time, but also when the generator-transformer group is abnormal or failed, the staff can take corresponding remedial measures in time, so as to further improve 3/2 the safety of the wiring generator-transformer group in the operation process.
Correspondingly, the embodiment of the utility model also discloses a safe operation system of the generator set, which comprises the 3/2 wiring generator set non-full-phase start failure protection device disclosed in the foregoing.
The safe operation system of the generator set provided by the embodiment of the utility model has the beneficial effects of the 3/2 wiring generator set non-full-phase starting failure protection device disclosed in the foregoing.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. An 3/2 wiring transformation group non-full-phase starting failure protection device is characterized in that a first protection outlet, a second protection outlet and a third protection outlet of a non-full-phase protection second in an RCS-974 non-electric quantity protection device are respectively connected with a starting failure of a side circuit breaker in a 3/2 wiring transformation group, a starting failure of a middle circuit breaker and an opening and closing of a non-electric quantity 3 in the RCS-974 non-electric quantity protection device, and the non-electric quantity 3 is made to control a trip I and a trip II of the side circuit breaker and a trip I and a trip II of the middle circuit breaker; and the side circuit breaker is connected with a non-full-phase action contact of the middle circuit breaker in parallel and is used as a non-full-phase opening of the RCS-974 non-electric quantity protection device.
2. The non-full-phase failsafe apparatus of claim 1, wherein the first protection outlet, the second protection outlet and the third protection outlet exit through a terminal block.
3. The non-full-phase start-up failsafe apparatus of claim 1, wherein the delay of the non-electrical quantity 3 is 0.
4. The non-full-phase failsafe device of claim 1, further comprising:
and the alarm is used for prompting the early warning information when the generator-transformer set starts tripping.
5. The non-full-phase start-up failure protection device according to any one of claims 1 to 4, wherein the start-up failure of the side circuit breaker, the start-up failure of the middle circuit breaker and the opening of the non-charge 3 are connected to the first protection outlet, the second protection outlet and the third protection outlet by means of clamp connection, respectively.
6. A safe operating system for a power generating unit, comprising an 3/2 wiring generator set non-full phase start fault protection device as claimed in any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121688923.2U CN215934457U (en) | 2021-07-23 | 2021-07-23 | 3/2 failure protection device for non-full phase starting of wiring generator set and safe operation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121688923.2U CN215934457U (en) | 2021-07-23 | 2021-07-23 | 3/2 failure protection device for non-full phase starting of wiring generator set and safe operation system |
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| CN215934457U true CN215934457U (en) | 2022-03-01 |
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| CN202121688923.2U Active CN215934457U (en) | 2021-07-23 | 2021-07-23 | 3/2 failure protection device for non-full phase starting of wiring generator set and safe operation system |
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