CN211405454U - Light gas protection device - Google Patents
Light gas protection device Download PDFInfo
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- CN211405454U CN211405454U CN202020146680.9U CN202020146680U CN211405454U CN 211405454 U CN211405454 U CN 211405454U CN 202020146680 U CN202020146680 U CN 202020146680U CN 211405454 U CN211405454 U CN 211405454U
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Abstract
The application discloses light gas protection device includes: the power supply comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module and an output protection module; the state acquisition module, the power supply side signal acquisition module and the output protection module are all connected with the state judgment module; the state acquisition module is used for acquiring light gas contact state data and transformer operation parameters and transmitting the light gas contact state data and the transformer operation parameters to the state judgment module; the power supply side signal acquisition module is used for acquiring the operation parameters of the power supply side of the transformer and transmitting the operation parameters to the state judgment module. The method solves the technical problems that due to the limitation of the prior art level, operation maintainers cannot find the defect of the internal fault of the main transformer, and the development condition of the internal fault of the main transformer body has no obvious external characteristic quantity reaction, so that the problems are difficult to find in time.
Description
Technical Field
The application relates to the technical field of gas relays, in particular to a light gas protection device.
Background
The existing gas relay uses the internal fault of the transformer to make the oil or insulating material decompose to generate gas or cause the oil flow to surge, so as to make the contact of the gas relay act and send out the alarm signal (light gas) or automatically cut off the transformer (heavy gas). When light gas mainly reflects operation or slight faults (such as overload heating, iron core local heating, oil tank heating caused by magnetic leakage and the like), gas decomposed by oil or insulating materials rises to enter a gas collection chamber of the gas relay, the oil level slowly descends due to air pressure, a float bowl or an opening cup of the relay falls along with the oil level, a contact of a light gas dry spring is connected to send a signal, and the action of heavy gas is caused due to the further descending of the oil level or the increase of oil-gas flow. Heavy gas mainly reflects that when serious faults such as bushing grounding, turn-to-turn short circuit and the like occur in the transformer, a large amount of gas is quickly generated to push oil flow to impact a baffle plate, and a magnet on the baffle plate attracts a heavy gas dry spring contact to be conducted to trip.
Generally, after the light gas action sends an alarm signal, a worker is arranged to confirm the actual conditions (including appearance abnormality, gas leakage, sound abnormality, whether gas in the light gas chamber is combustible, and the like) of the main transformer body on site, and then reports the actual conditions to a professional technician according to the actual conditions on site to confirm whether power failure occurs to perform related inspection (including gas analysis, main transformer related tests, gas relay inspection, related loop inspection, and the like), so as to determine whether the main transformer internal fault occurs. The existing gas relay generally sends an alarm signal through a single light gas action to remind an operation maintainer to carry out on-site inspection on whether each part of a transformer is abnormal or not, and meanwhile, the gas components of the light gas action are inspected. In the process, the arrival time of personnel is uncertain, operation maintainers cannot find the defect of the internal fault of the main transformer due to the limitation of the prior art after the personnel arrive, and the development condition of the internal fault of the main transformer body has no obvious external characteristic quantity response, so that the problems are difficult to find in time.
SUMMERY OF THE UTILITY MODEL
The application provides a light gas protection device, through the real-time supervision control to each item parameter of transformer, has solved because prior art level's limitation, and operation maintainer often has not found the main internal fault defect that becomes by the way, and the development condition of main body internal fault does not have obvious extrinsic characteristic volume reaction, consequently is difficult to the technical problem of in time finding the problem.
The application provides a light gas protection device includes:
the power supply comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module and an output protection module;
the state acquisition module, the power supply side signal acquisition module and the output protection module are all connected with the state judgment module;
the state acquisition module is used for acquiring light gas contact state data and transformer operation parameters and transmitting the light gas contact state data and the transformer operation parameters to the state judgment module;
the power supply side signal acquisition module is used for acquiring the operation parameters of the power supply side of the transformer and transmitting the operation parameters to the state judgment module;
the state judging module respectively judges whether abnormality exists according to the state data, the transformer operation parameters and the operation parameters of the transformer power supply side, and if the abnormality exists, the output protection module is warned to enable the output protection module to perform corresponding protection actions.
Optionally, the state acquisition module includes light gas contact state acquisition unit, with the state judgment module is connected, light gas contact state acquisition unit is used for first light gas contact state acquisition, the collection of the light gas contact state of second and the collection of the light gas contact state of third.
Optionally, the acquisition module includes a transformer operation parameter acquisition unit, connected to the state judgment module, and configured to acquire a state parameter of a circuit breaker on a power supply side of the transformer, an online oil filtering state parameter of the transformer, and a state parameter of an oil circulation motor of the transformer.
Optionally, the transformer operation parameter acquisition unit is further configured to acquire an electric quantity protection start signal of the transformer, a transformer oil and pipeline maintenance state, a first heavy gas contact state of the transformer, and a second heavy gas contact state of the transformer.
Optionally, the power supply side signal acquisition module comprises a current acquisition unit and a voltage acquisition unit, which are both connected with the state judgment module; the current acquisition unit is used for acquiring three-phase current at the power supply side of the transformer and zero-sequence current at the power supply side of the transformer; the voltage acquisition unit is used for acquiring the three-phase voltage of the power supply side of the transformer.
Optionally, the output protection module includes a high-voltage side trip contact, a transformer medium-voltage side trip contact, and a transformer low-voltage side trip contact connected in parallel with each other.
Optionally, the output protection module includes a light gas protection trip contact, a light gas protection alarm contact, and a light gas abnormality alarm contact, which are connected in parallel to each other.
Optionally, the output protection module includes: the gas protection action tripping locking power supply side closing contact and the locking opposite side station closing contact are connected in parallel.
Optionally, the light gas contact state acquisition unit is further configured to: the light gas time delay 1 protection is formed by action time difference of a first light gas contact and a second light gas contact, the light gas time delay 2 protection is formed by action time difference of the second light gas contact and a third light gas contact, 2 sections of settable time delay are designed on the light gas time delay 1 protection, and 2 sections of settable time delay are designed on the light gas time delay 2 protection, so that tripping or alarming can be selected.
Optionally, the output protection module is further configured to:
after a breaker at the power supply side is switched on, accelerating light gas to delay 1 protective tripping and accelerating light gas to delay 2 protective tripping;
after the online oil filtering operation of the transformer, accelerating light gas to delay 1 protective trip and accelerating light gas to delay 2 protective trip;
after the transformer oil circulating motor operates, accelerating light gas to delay 1 protective tripping and accelerating light gas to delay 2 protective tripping;
after the transformer oil and the pipeline are in a maintenance state, accelerating light gas to delay 1 protective tripping and accelerating light gas to delay 2 protective tripping;
after the transformer is started with an electric quantity protection action, accelerating light gas delay 1 to protect tripping and accelerating light gas delay 2 to protect tripping;
after the transformer autonomous electric quantity protection action, the light gas is accelerated to carry out delayed 1 protection tripping and the light gas is accelerated to carry out delayed 2 protection tripping.
In order to solve the technical problem that exists among the prior art, this application provides a light gas protection device, includes:
the power supply comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module and an output protection module;
the state acquisition module, the power supply side signal acquisition module and the output protection module are all connected with the state judgment module;
the state acquisition module is used for acquiring light gas contact state data and transformer operation parameters and transmitting the light gas contact state data and the transformer operation parameters to the state judgment module;
the power supply side signal acquisition module is used for acquiring the operation parameters of the power supply side of the transformer and transmitting the operation parameters to the state judgment module;
the state judging module respectively judges whether abnormality exists according to the state data, the transformer operation parameters and the operation parameters of the transformer power supply side, and if the abnormality exists, the output protection module is warned to enable the output protection module to perform corresponding protection actions.
According to the light gas protection device and the light gas protection method, the obtained state data of the light gas contact, the operation parameters of the transformer and the operation parameters of the power supply side of the transformer can be monitored respectively, and the data are transmitted to the state judgment module. The state judgment module sends a command to the output fuzzy module through the judgment of the data when judging that the data corresponding to a certain interface is abnormal, so that the output protection module reacts to the corresponding interface according to the command to prompt the outside that the operating items corresponding to the interface have faults. The transformer internal fault monitoring system based on the real-time monitoring and control solves the problems that due to the limitation of the prior art, operation maintainers cannot find the internal fault defect of a main transformer, and the development condition of the internal fault of a main transformer body has no obvious external characteristic quantity response, so that the problems are difficult to find in time.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a light gas protection device provided in the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
Because the existing gas relay generally sends out an alarm signal through a single light gas action to remind an operation maintainer to check whether the transformer is abnormal or not and simultaneously check the gas components triggering the light gas action. However, in the whole process, the time for the operation maintainer to arrive at the alarm site is uncertain, the operation maintainer arrives at the alarm site due to the limitation of the prior art, and the operation maintainer cannot easily check the defects in the main transformer body due to the fact that the faults caused by the defects in the main transformer body are not obvious in the representation of the external characteristic quantity.
After the existing gas relay generates single light gas action, even if the gas in the relay increases, the light gas relay can not act again to prompt the change of the gas quantity. That is, when there is a developmental fault in the main transformer, if the conventional gas relay does not perform the air bleeding and returning operation in the light gas operation, the light gas will not operate again even if the gas is continuously released. Therefore, the present invention is provided to operate at the initial stage of the development of the fault and trip the respective side breakers of the transformer, so that the buchholz relay can respond differently in stages according to different amounts of gas discharged when the transformer continuously discharges the gas in a short time.
In the operation process of the existing main transformer, the main transformer light gas relay acts due to oil path pipeline problems, structural problems or other conditions causing slow gas release or gas release amount increase, and an alarm signal is sent by mistake. However, in this case, the time interval between the first light gas action and the second light gas action of the light gas relay caused by the slowly increasing gas is long, so that the phenomenon of mistaken alarm signal can be prevented by adjusting the time interval between the first light gas action and the second light gas action of the light gas relay in the present application.
In a certain time after main transformer debugging, overhauling or oil filtering and then inputting, stagnant gas can be gradually released from a transformer, when the released amount of the stagnant gas reaches the threshold value of light gas action and causes corresponding light gas action, the situation is different from the time length of the light gas action caused by decomposed gas generated by faults when the main transformer debugging, overhauling or oil filtering and then inputting into operation, but the logic of the light gas action set in the prior art does not consider the time length of the light gas action when the main transformer debugging, overhauling or oil filtering and then inputting into operation, so that the stagnant gas or the fault decomposed gas which causes the light gas action is difficult to distinguish, and therefore, both the stagnant gas and the fault decomposed gas can cause alarm. The present application also makes corresponding adjustments to this phenomenon.
The application provides a light gas protection device, through the real-time supervision control to each item parameter of transformer, has solved because prior art level's limitation, and operation maintainer often has not found the main internal fault defect that becomes by the way, and the development condition of main body internal fault does not have obvious extrinsic characteristic volume reaction, consequently is difficult to the technical problem of in time finding the problem.
For easy understanding, please refer to fig. 1, which is a schematic structural diagram of an embodiment of a light gas protection device provided in the present application;
the embodiment of the application provides a light gas protection device, includes:
the power supply comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module and an output protection module;
the state acquisition module, the power supply side signal acquisition module and the output protection module are all connected with the state judgment module;
the state acquisition module is used for acquiring light gas contact state data and transformer operation parameters and transmitting the light gas contact state data and the transformer operation parameters to the state judgment module;
the power supply side signal acquisition module is used for acquiring the operation parameters of the power supply side of the transformer and transmitting the operation parameters to the state judgment module;
the state judging module respectively judges whether abnormality exists according to the state data, the transformer operation parameters and the operation parameters of the transformer power supply side, and if the abnormality exists, the output protection module gives out warning and prompts so that the output protection module can make corresponding protection actions.
It should be noted that the light gas protection device provided by the application comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module and an output protection module. The state acquisition module can be used for the 1 st light gas contact state acquisition, the 2 nd light gas contact state acquisition, the 3 rd light gas contact state acquisition, the transformer power supply side circuit breaker state acquisition and the acquisition of other electric quantity protection starting signals of the transformer.
The output protection module is provided with a plurality of trip contacts, so that the output protection module can make corresponding trip reaction according to different abnormal conditions.
The power supply side signal acquisition module can be used for acquiring three-phase current of a main transformer power supply side, zero-sequence current of the main transformer power supply side and three-phase voltage of the main transformer power supply side.
The state judgment module carries out comprehensive analysis and judgment through data acquired by the state acquisition module and the power supply side signal acquisition module, and controls the output protection module to start a corresponding output contact according to a finally obtained result so as to realize warning effects such as tripping, locking or alarming.
Further, the state acquisition module comprises a light gas contact state acquisition unit connected with the state judgment module, and the light gas contact state acquisition unit is used for first light gas contact state acquisition, second light gas contact state acquisition and third light gas contact state acquisition.
It should be noted that the state acquisition module is provided with a first light gas contact state acquisition circuit, a second light gas contact state acquisition circuit and a third light gas contact state acquisition circuit which are connected in parallel, and the first light gas contact state acquisition circuit, the second light gas contact state acquisition circuit and the third light gas contact state acquisition circuit are all connected to the state judgment module.
Further, the state acquisition module comprises a transformer operation parameter acquisition unit connected with the state judgment module and used for acquiring the state parameters of the circuit breaker on the power supply side of the transformer, the online oil filtering state parameters of the transformer and the state parameters of the transformer oil circulating motor.
It should be noted that the state acquisition module may also be used for acquiring state parameters of a circuit breaker on the power supply side of the transformer, acquiring on-line oil filtering state parameters of the transformer, and acquiring state parameters of an oil circulating motor of the transformer.
Furthermore, the transformer operation parameter acquisition unit is also used for acquiring an electric quantity protection starting signal of the transformer, a transformer oil and pipeline maintenance state, a first heavy gas contact state of the transformer and a second heavy gas contact state of the transformer.
It should be noted that the state acquisition module can also be used for acquiring other electric quantity protection starting signals of the transformer, the state of the heavy gas 1 joint of the transformer, the state of the heavy gas 2 joint of the transformer, transformer oil and the pipeline maintenance state.
Furthermore, the power supply side signal acquisition module comprises a current acquisition unit and a voltage acquisition unit which are both connected with the state judgment module; the current acquisition unit is used for acquiring three-phase current at the power supply side of the transformer and zero-sequence current at the power supply side of the transformer; the voltage acquisition unit is used for acquiring three-phase voltage of the power supply side of the transformer.
The power supply side signal acquisition module is provided with a main transformer power supply side three-phase current acquisition circuit, a main transformer power supply side zero-sequence current acquisition circuit and a main transformer power supply side three-phase voltage acquisition circuit; the method is used for collecting three-phase current at a power supply side, zero-sequence current at the power supply side and three-phase voltage at a transformer power supply side respectively.
Further, the output protection module comprises a high-voltage side trip contact, a transformer medium-voltage side trip contact and a transformer low-voltage side trip contact which are connected in parallel with each other.
It should be noted that the output protection module includes a transformer high-voltage side trip contact 1, a transformer high-voltage side trip contact 2, a transformer medium-voltage side trip contact 1, a transformer medium-voltage side trip contact 2, a transformer low-voltage side trip contact 1, a transformer low-voltage side trip contact 2, a transformer trip lock power supply side switch-on contact 1, a transformer trip lock power supply side switch-on contact 2, a transformer trip lock opposite side station switch-on contact 1, and a transformer trip lock opposite side station switch-on contact 2, which are connected in parallel.
Further, the output protection module comprises a light gas protection tripping contact, a light gas protection warning contact and a light gas abnormity warning contact which are connected in parallel.
It should be noted that the output protection module further includes a light gas protection action trip signal contact 1, a light gas protection action trip signal contact 2, a light gas protection alarm signal contact 1, a light gas protection alarm signal contact 2, and a light gas protection device abnormality alarm signal contact, which are connected in parallel.
Further, the output protection module includes: the gas protection action tripping locking power supply side closing contact and the locking opposite side station closing contact are connected in parallel.
It should be noted that the output protection module includes: the gas protection action tripping locking power supply side closing contact and the locking opposite side station closing contact are connected in parallel.
Further, light gas contact state acquisition unit still is used for: the action time difference of the first light gas contact and the second light gas contact forms light gas delay 1 protection, the action time difference of the second light gas contact and the third light gas contact forms light gas delay 2 protection, 2 sections of settable delays are designed for the light gas delay 1 protection, and 2 sections of settable delays are designed for the light gas delay 2 protection, so that tripping or alarming can be selected.
It should be noted that the light gas contact state acquisition unit is further configured to: the action time difference of the first light gas contact and the second light gas contact forms light gas delay 1 protection, the action time difference of the second light gas contact and the third light gas contact forms light gas delay 2 protection, 2 sections of settable delays are designed for the light gas delay 1 protection, and 2 sections of settable delays are designed for the light gas delay 2 protection, so that tripping or alarming can be selected.
Further, the output protection module is further configured to:
after a breaker at the power supply side is switched on, accelerating light gas to delay 1 protective tripping and accelerating light gas to delay 2 protective tripping;
after the online oil filtering operation of the transformer, accelerating light gas to delay 1 protective trip and accelerating light gas to delay 2 protective trip;
after the transformer oil circulating motor operates, accelerating light gas to delay 1 protective tripping and accelerating light gas to delay 2 protective tripping;
after the transformer oil and the pipeline are in a maintenance state, accelerating light gas to delay 1 protective tripping and accelerating light gas to delay 2 protective tripping;
after the transformer is started with an electric quantity protection action, accelerating light gas delay 1 to protect tripping and accelerating light gas delay 2 to protect tripping;
after the transformer autonomous electric quantity protection action, the light gas is accelerated to carry out delayed 1 protection tripping and the light gas is accelerated to carry out delayed 2 protection tripping.
It should be noted that the output protection module also functions as: after judging that a breaker on the power supply side is switched on, accelerating light gas delay 1 to protect tripping and accelerating light gas delay 2 to protect tripping;
after the on-line oil filtering operation of the transformer is judged, the light gas is accelerated to carry out time delay 1 protection trip and the light gas is accelerated to carry out time delay 2 protection trip;
after the operation of the transformer oil circulating motor is judged, the light gas is accelerated to carry out time delay 1 protection trip and the light gas is accelerated to carry out time delay 2 protection trip;
after the transformer oil and the pipeline are judged to have the maintenance state, accelerating the light gas delay 1 to carry out protection tripping and accelerating the light gas delay 2 to carry out protection tripping;
after the transformer is judged to have the electric quantity protection action and is started, accelerating light gas delay 1 to carry out protection tripping and accelerating light gas delay 2 to carry out protection tripping;
and after the autonomous electric quantity protection action of the transformer is judged, accelerating light gas time delay 1 protection tripping and accelerating light gas time delay 2 protection tripping.
The light gas protection device of the application has the working flow that: and judging whether the abnormity exists or not by acquiring the light gas contact state data, the transformer operating parameters and the operating parameters of the transformer power supply side and according to the light gas contact state data, the transformer operating parameters and the operating parameters of the transformer power supply side, and if so, giving a warning.
Wherein, for the light gas component 1, 2 segments of special timing time are set, which are respectively time T1 and time T2: the time T1 is started by the protection action of light gas 1 (namely, the connection of the 1 st light gas contact) and stopped by the protection action of light gas 2 (namely, the connection of the 2 nd light gas contact); the time T2 is started by the protection action of light gas 2 (namely, the connection of the 2 nd light gas contact) and stopped by the protection action of light gas 3 (namely, the connection of the 3 rd light gas contact); after the 1 st light gas protection action, the 1 st light gas contact is connected, on one hand, a light gas protection device (namely, a state judgment module, the same as the following) starts (through a protection output module, the same as the following) a light gas protection alarm signal 1 and a light gas protection alarm signal 2 signal, and simultaneously sends out a first light gas action soft message, wherein the message can be inquired through a man-machine interface and also can be transmitted through a communication interface, and on the other hand, the starting time T1 is timed;
after the 2 nd light gas protection action, the 2 nd light gas contact is connected, on one hand, the light gas protection device starts a light gas protection alarm signal 1 and a light gas protection alarm signal 2, and simultaneously sends out a 2 nd light gas action soft message, wherein the message can be inquired through a man-machine interface and also can be transmitted through a communication interface, and the time T1 is stopped for timing, and on the other hand, the time T2 is started for timing;
after the light gas protection action of the No. 3, the light gas contact of the No. 3 is connected, on one hand, the light gas comprehensive protection device starts the light gas protection alarm signal 1 and the light gas protection alarm signal 2, and simultaneously sends out a light gas action soft message of the No. 3, the message can be inquired through a man-machine interface and can also be transmitted through a communication interface, and the time T2 is stopped for timing.
Further, according to the light gas contact state data, the transformer operation parameters and the operation parameters of the transformer power supply side, whether abnormity exists is judged, and if yes, warning is given, and the method further comprises the following steps:
and judging whether the light gas delay meets a first delay threshold value or not, and if so, starting a first tripping interface.
It should be noted that, when the light gas time delay meets the first time delay threshold, the first trip interface is started.
Further, according to the light gas contact state data, the transformer operation parameters and the operation parameters of the transformer power supply side, whether abnormity exists is judged, and if yes, warning is given, and the method further comprises the following steps:
and judging whether the light gas delay meets a second delay threshold value or not, and if so, starting a second tripping interface.
It should be noted that the light gas delay 1 protection design has 2 sections of delays, namely, a delay T1-1 and a delay T1-2, the two sections of delays can be set through a human-computer interface, wherein the setting ranges of the delay T1-1 are as follows: 0 to 24 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 24 hours, with the accuracy of seconds and the level difference of seconds; the setting ranges of the delay T1-2 are as follows: 0 to 168 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 168 hours, precisely seconds, and the grade difference is seconds;
when the time T1 is less than or equal to T1-1 (T1-1 is a settable value), the light gas delay 1 protects the delay T1-1 section to act, and the following tripping outlet contacts are respectively started after the protection act: the high-voltage side tripping contact of the transformer 1, the high-voltage side tripping contact of the transformer 2, the medium-voltage side tripping contact of the transformer 1, the medium-voltage side tripping contact of the transformer 2, the low-voltage side tripping contact of the transformer 1, the low-voltage side tripping contact of the transformer 2, the power side closing contact of the transformer tripping lockout 1, the power side closing contact of the transformer tripping lockout 2, the light gas protection action tripping signal contact 1 and the light gas protection action tripping signal contact 2;
wherein:
a transformer high-voltage side tripping contact 1 connected to the transformer high-voltage side tripping coil 1; the transformer high-voltage side tripping contact 2 is connected to the transformer high-voltage side tripping coil 2, and meets the wiring requirement of starting the tripping fault transformer high-voltage side double-tripping loop;
a transformer medium voltage side trip contact 1 connected to the transformer medium voltage side trip coil 1; the transformer medium-voltage side tripping contact 2 is connected to the transformer medium-voltage side tripping coil 2, so that the wiring requirement of starting the medium-voltage side double-tripping loop of the tripping fault transformer is met;
a transformer low-voltage side tripping contact 1 connected to a tripping coil of the transformer low-voltage side branch 1; the tripping contact 2 at the low-voltage side of the transformer is connected to the tripping coil of the branch 2 at the low-voltage side of the transformer, so that the requirement of starting the tripping loop with double branches at the low-voltage side of the tripping fault transformer is met;
and a transformer tripping locking power supply side closing contact 1 is connected to the transformer power supply side closing locking loop to realize light gas time delay 1 protection action locking closing. The purpose is that light gas time delay 1 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
And a transformer trip locking power supply side closing contact 2 is connected to a locking loop of the transformer power supply side spare power automatic switching device, so that the light gas time delay 1 is realized to protect the action locking spare power automatic switching device and the transformer power supply side circuit breaker is automatically locked. The purpose is that light gas time delay 1 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
The transformer tripping locking power supply side closing contact 2, the transformer tripping locking opposite side station closing contact 1 and the transformer tripping locking opposite side station closing contact 2 are respectively connected to the corresponding remote transmission device of the transformer power supply side, the circuit reclosing function corresponding to the transformer station on the locking opposite side is achieved, the situation that due to the transformer fault of the transformer station, a circuit breaker does not trip after protection actions such as light gas protection are contained is prevented, and after the circuit breaker is tripped by protection actions of the transformer station on the opposite side, the reclosing actions of the circuit breaker are transmitted to a fault transformer again, and further damage to the transformer is caused. The locking contact is returned only after the light gas protection device is reset.
The light gas protection action trip signal contact 1 is connected to a fault recording signal contact, and the light gas protection action trip signal contact 2 is connected to a monitoring system to realize remote alarm signal output.
Meanwhile, the light gas protection device sends out a 'light gas delay 1 protection delay T1-1 section action soft message', and the message can be inquired through a man-machine interface and also can be transmitted through a communication interface.
When the time T1 is less than or equal to T1-2 (T1-2 is a settable value), the light gas delay 1 protects the delay T1-2 section action, and the following tripping outlet contacts are respectively started after the protection action: the high-voltage side tripping contact of the transformer 1, the high-voltage side tripping contact of the transformer 2, the medium-voltage side tripping contact of the transformer 1, the medium-voltage side tripping contact of the transformer 2, the low-voltage side tripping contact of the transformer 1, the low-voltage side tripping contact of the transformer 2, the power side closing contact of the transformer tripping lockout 1, the power side closing contact of the transformer tripping lockout 2, the light gas protection action tripping signal contact 1 and the light gas protection action tripping signal contact 2;
wherein:
a transformer high-voltage side tripping contact 1 connected to the transformer high-voltage side tripping coil 1; the transformer high-voltage side tripping contact 2 is connected to the transformer high-voltage side tripping coil 2, and meets the wiring requirement of starting the tripping fault transformer high-voltage side double-tripping loop;
a transformer medium voltage side trip contact 1 connected to the transformer medium voltage side trip coil 1; the transformer medium-voltage side tripping contact 2 is connected to the transformer medium-voltage side tripping coil 2, so that the wiring requirement of starting the medium-voltage side double-tripping loop of the tripping fault transformer is met;
a transformer low-voltage side tripping contact 1 connected to a tripping coil of the transformer low-voltage side branch 1; the tripping contact 2 at the low-voltage side of the transformer is connected to the tripping coil of the branch 2 at the low-voltage side of the transformer, so that the requirement of starting the tripping loop with double branches at the low-voltage side of the tripping fault transformer is met;
and a transformer tripping locking power supply side closing contact 1 is connected to the transformer power supply side closing locking loop to realize light gas time delay 1 protection action locking closing. The purpose is that light gas time delay 1 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
And a transformer trip locking power supply side closing contact 2 is connected to a locking loop of the transformer power supply side spare power automatic switching device, so that the light gas time delay 1 is realized to protect the action locking spare power automatic switching device and the transformer power supply side circuit breaker is automatically locked. The purpose is that light gas time delay 1 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
The transformer tripping locking power supply side closing contact 2, the transformer tripping locking opposite side station closing contact 1 and the transformer tripping locking opposite side station closing contact 2 are respectively connected to the corresponding remote transmission device of the transformer power supply side, the circuit reclosing function corresponding to the transformer station on the locking opposite side is achieved, the situation that due to the transformer fault of the transformer station, a circuit breaker does not trip after protection actions such as light gas protection are contained is prevented, and after the circuit breaker is tripped by protection actions of the transformer station on the opposite side, the reclosing actions of the circuit breaker are transmitted to a fault transformer again, and further damage to the transformer is caused. The locking contact is returned only after the light gas protection device is reset.
The light gas protection action trip signal contact 1 is connected to a fault recording signal contact, and the light gas protection action trip signal contact 2 is connected to a monitoring system to realize remote alarm signal output.
Meanwhile, the light gas comprehensive protection device sends out a 'light gas delay 1 protection delay T1-1 section action soft message', and the message can be inquired through a man-machine interface and also can be transmitted through a communication interface.
Light gas time delay 2 protection: the light gas time delay 2 protection design has 2 sections of time delays, namely time delay T2-1 and time delay T2-2, the two sections of time delays can be set through a human-computer interface, wherein the setting ranges of the time delay T2-1 are as follows: 0 to 24 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 24 hours, with the accuracy of seconds and the level difference of seconds; the setting ranges of the delay T2-2 are as follows: 0 to 168 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 168 hours, precisely seconds, and the grade difference is seconds;
when the time T2 is less than or equal to T2-1 (T2-1 is a settable value), the light gas is delayed for 2 protective time delay T2-1 section to act, and the following tripping outlet contacts are respectively started after the protective action: the high-voltage side tripping contact of the transformer 1, the high-voltage side tripping contact of the transformer 2, the medium-voltage side tripping contact of the transformer 1, the medium-voltage side tripping contact of the transformer 2, the low-voltage side tripping contact of the transformer 1, the low-voltage side tripping contact of the transformer 2, the power side closing contact of the transformer tripping lockout 1, the power side closing contact of the transformer tripping lockout 2, the light gas protection action tripping signal contact 1 and the light gas protection action tripping signal contact 2;
wherein:
a transformer high-voltage side tripping contact 1 connected to the transformer high-voltage side tripping coil 1; the transformer high-voltage side tripping contact 2 is connected to the transformer high-voltage side tripping coil 2, and meets the wiring requirement of starting the tripping fault transformer high-voltage side double-tripping loop;
a transformer medium voltage side trip contact 1 connected to the transformer medium voltage side trip coil 1; the transformer medium-voltage side tripping contact 2 is connected to the transformer medium-voltage side tripping coil 2, so that the wiring requirement of starting the medium-voltage side double-tripping loop of the tripping fault transformer is met;
a transformer low-voltage side tripping contact 1 connected to a tripping coil of the transformer low-voltage side branch 1; the tripping contact 2 at the low-voltage side of the transformer is connected to the tripping coil of the branch 2 at the low-voltage side of the transformer, so that the requirement of starting the tripping loop with double branches at the low-voltage side of the tripping fault transformer is met;
and a transformer tripping locking power supply side closing contact 1 is connected to the transformer power supply side closing locking loop to realize light gas delay 2 protection action locking closing. The purpose is that light gas time delay 2 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
And a transformer trip locking power supply side closing contact 2 is connected to a locking loop of the transformer power supply side spare power automatic switching device, so that the light gas delay 2 protection action locking spare power automatic switching device automatically locks the transformer power supply side circuit breaker. The purpose is that light gas time delay 2 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
The transformer tripping locking power supply side closing contact 2, the transformer tripping locking opposite side station closing contact 1 and the transformer tripping locking opposite side station closing contact 2 are respectively connected to the corresponding remote transmission device of the transformer power supply side, the circuit reclosing function corresponding to the transformer station on the locking opposite side is achieved, the situation that due to the transformer fault of the transformer station, a circuit breaker does not trip after protection actions such as light gas comprehensive protection and the like are contained is prevented, and after the circuit breaker is tripped by protection actions of the transformer station on the opposite side, the reclosing action of the circuit breaker is transmitted to a fault transformer again, and the transformer is further damaged. The locking contact is returned only after the light gas comprehensive protection device is reset.
The light gas protection action trip signal contact 1 is connected to a fault recording signal contact, and the light gas protection action trip signal contact 2 is connected to a monitoring system to realize remote alarm signal output.
Meanwhile, the light gas comprehensive protection device sends out a 'light gas delay 2 protection delay T2-1 section action soft message', and the message can be inquired through a man-machine interface and also can be transmitted through a communication interface.
When the time T2 is less than or equal to T2-2 (T2-2 is a settable value), the light gas is delayed for 2, the protection is delayed for T2-2, and the following tripping outlet contacts are respectively started after the protection: the high-voltage side tripping contact of the transformer 1, the high-voltage side tripping contact of the transformer 2, the medium-voltage side tripping contact of the transformer 1, the medium-voltage side tripping contact of the transformer 2, the low-voltage side tripping contact of the transformer 1, the low-voltage side tripping contact of the transformer 2, the power side closing contact of the transformer tripping lockout 1, the power side closing contact of the transformer tripping lockout 2, the light gas protection action tripping signal contact 1 and the light gas protection action tripping signal contact 2;
wherein:
a transformer high-voltage side tripping contact 1 connected to the transformer high-voltage side tripping coil 1; the transformer high-voltage side tripping contact 2 is connected to the transformer high-voltage side tripping coil 2, and meets the wiring requirement of starting the tripping fault transformer high-voltage side double-tripping loop;
a transformer medium voltage side trip contact 1 connected to the transformer medium voltage side trip coil 1; the transformer medium-voltage side tripping contact 2 is connected to the transformer medium-voltage side tripping coil 2, so that the wiring requirement of starting the medium-voltage side double-tripping loop of the tripping fault transformer is met;
a transformer low-voltage side tripping contact 1 connected to a tripping coil of the transformer low-voltage side branch 1; the tripping contact 2 at the low-voltage side of the transformer is connected to the tripping coil of the branch 2 at the low-voltage side of the transformer, so that the requirement of starting the tripping loop with double branches at the low-voltage side of the tripping fault transformer is met;
and a transformer tripping locking power supply side closing contact 1 is connected to the transformer power supply side closing locking loop to realize light gas delay 2 protection action locking closing. The purpose is that light gas time delay 2 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
And a transformer trip locking power supply side closing contact 2 is connected to a locking loop of the transformer power supply side spare power automatic switching device, so that the light gas delay 2 protection action locking spare power automatic switching device automatically locks the transformer power supply side circuit breaker. The purpose is that light gas time delay 2 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
The transformer tripping locking power supply side closing contact 2, the transformer tripping locking opposite side station closing contact 1 and the transformer tripping locking opposite side station closing contact 2 are respectively connected to the corresponding remote transmission device of the transformer power supply side, the circuit reclosing function corresponding to the transformer station on the locking opposite side is achieved, the situation that due to the transformer fault of the transformer station, a circuit breaker does not trip after protection actions such as light gas protection are contained is prevented, and after the circuit breaker is tripped by protection actions of the transformer station on the opposite side, the reclosing actions of the circuit breaker are transmitted to a fault transformer again, and further damage to the transformer is caused. The locking contact is returned only after the light gas protection device is reset.
The light gas protection action trip signal contact 1 is connected to a fault recording signal contact, and the light gas protection action trip signal contact 2 is connected to a monitoring system to realize remote alarm signal output.
Meanwhile, the light gas protection device sends out a 'light gas delay 2 protection delay T2-1 section action soft message', and the message can be inquired through a man-machine interface and also can be transmitted through a communication interface.
Note: the design totally has 4 sections of light gas time delay protection, and the convenience of use adopts different alarm and tripping schemes according to the difference of the internal structure of the transformer and the difference of the gas output.
Light gas accelerated protection after the breaker is switched on: after the breaker is switched on, light gas acceleration protection is put into the breaker within the time S after the breaker is switched on, and the light gas acceleration protection is automatically withdrawn after the time S; the time S is a settable time, wherein the setting range of the time delay S is as follows: 0 to 1 hour, the precision is second, and the grade difference is second;
light gas accelerated protection after the breaker is switched on: 1 section of special time delay TJ-1 is designed, wherein the setting range of the time delay TJ-1 is as follows: 0 to 1 hour, the precision is second, and the grade difference is second;
the light gas accelerated protection action after the breaker is switched on is explained:
when the power supply side circuit-breaking switch of the transformer is changed from open position to closed position, the light gas protection device acquires input signals through the power supply side circuit-breaking state of the transformer, judges that the input signals are 'circuit breaker closed', puts into 'light gas accelerated protection after the circuit breaker is closed', if the 'first light gas contact is switched on', namely, the light gas comprehensive protection device judges that the input signal is the action of 'first light gas' through 'the state collection of the first light gas contact point', the time delay TJ-1 is started, when the TJ-1 timing reaches the setting delay, the light gas comprehensive protection device starts a light gas protection alarm signal 1 and a light gas protection alarm signal 2 on one hand, and sends a 'light gas accelerated protection soft message after the breaker is switched on' at the same time, the message can be inquired through a man-machine interface and can also be transmitted through a communication interface, and on the other hand, the following tripping outlet contacts are started: the high-voltage side tripping contact of the transformer 1, the high-voltage side tripping contact of the transformer 2, the medium-voltage side tripping contact of the transformer 1, the medium-voltage side tripping contact of the transformer 2, the low-voltage side tripping contact of the transformer 1, the low-voltage side tripping contact of the transformer 2, the power side closing contact of the transformer tripping lockout 1, the power side closing contact of the transformer tripping lockout 2, the light gas protection action tripping signal contact 1 and the light gas protection action tripping signal contact 2;
wherein:
a transformer high-voltage side tripping contact 1 connected to the transformer high-voltage side tripping coil 1; the transformer high-voltage side tripping contact 2 is connected to the transformer high-voltage side tripping coil 2, and meets the wiring requirement of starting the tripping fault transformer high-voltage side double-tripping loop;
a transformer medium voltage side trip contact 1 connected to the transformer medium voltage side trip coil 1; the transformer medium-voltage side tripping contact 2 is connected to the transformer medium-voltage side tripping coil 2, so that the wiring requirement of starting the medium-voltage side double-tripping loop of the tripping fault transformer is met;
a transformer low-voltage side tripping contact 1 connected to a tripping coil of the transformer low-voltage side branch 1; the tripping contact 2 at the low-voltage side of the transformer is connected to the tripping coil of the branch 2 at the low-voltage side of the transformer, so that the requirement of starting the tripping loop with double branches at the low-voltage side of the tripping fault transformer is met;
and a transformer tripping locking power supply side closing contact 1 is connected to the transformer power supply side closing locking loop to realize light gas delay 2 protection action locking closing. The purpose is that light gas time delay 2 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
And a transformer trip locking power supply side closing contact 2 is connected to a locking loop of the transformer power supply side spare power automatic switching device, so that the light gas delay 2 protection action locking spare power automatic switching device automatically locks the transformer power supply side circuit breaker. The purpose is that light gas time delay 2 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
The transformer tripping locking power supply side closing contact 2, the transformer tripping locking opposite side station closing contact 1 and the transformer tripping locking opposite side station closing contact 2 are respectively connected to the corresponding remote transmission device of the transformer power supply side, the circuit reclosing function corresponding to the transformer station on the locking opposite side is achieved, the situation that due to the transformer fault of the transformer station, a circuit breaker does not trip after protection actions such as light gas comprehensive protection and the like are contained is prevented, and after the circuit breaker is tripped by protection actions of the transformer station on the opposite side, the reclosing action of the circuit breaker is transmitted to a fault transformer again, and the transformer is further damaged. The locking contact is returned only after the light gas protection device is reset.
The light gas protection action trip signal contact 1 is connected to a fault recording signal contact, and the light gas protection action trip signal contact 2 is connected to a monitoring system to realize remote alarm signal output.
Meanwhile, the light gas protection device sends out a 'light gas delay 2 protection delay T2-1 section action soft message', and the message can be inquired through a man-machine interface and also can be transmitted through a communication interface.
Note: light gas accelerated protection after the 1-section circuit breaker is closed is designed, and the light fault inside the transformer is caused by the fact that the impact current of the transformer is input after new construction or maintenance is timely cut off.
Electric quantity protection accelerates light gas time delay 1 protect function:
the light gas protection device acquires three-phase current at the side of a main transformer power supply, zero-sequence current at the side of the main transformer power supply and three-phase voltage at the side of the main transformer power supply through a power supply side signal acquisition module, realizes three-phase current protection analysis and judgment, zero-sequence current protection analysis and judgment, three-phase voltage protection analysis and judgment, self-produced zero-sequence voltage protection analysis and judgment, harmonic protection analysis and judgment, three-phase interphase distance protection analysis and judgment and three-phase grounding distance protection analysis and judgment through an operation and abnormity judgment unit, automatically reduces T1-1 time delay for starting and accelerating the light gas time delay 1 protection to other protection acceleration section time delay if any one protection is started, the time is settable time, namely the setting is in the range of 0 to 30 seconds, the precision is millisecond, and the level difference is millisecond; the T1-2 time delay for starting and accelerating the light gas time delay 1 protection is automatically reduced to other protection acceleration section time delay, the time is settable, namely the time can be set within the range of 0-30 seconds, the precision is millisecond, and the level difference is millisecond;
the electric quantity protection accelerates the action outlet and the alarm mode of the light gas time delay 1 protection and the light gas time delay 1 protection.
After the light gas protection device acquires other electric quantity protection action signals through the state acquisition module, the T1-1 time delay for accelerating the light gas time delay 1 protection is started to be automatically reduced to other protection acceleration section time delays, the time is settable time, namely the time can be set within the range of 0-30 seconds, the precision is millisecond, and the level difference is millisecond; the T1-2 time delay of the start acceleration complaint light gas time delay 1 protection is automatically reduced to other protection acceleration section time delays, the time is settable time, namely the settable time is in the range of 0-30 seconds, the precision is millisecond, and the level difference is millisecond;
the electric quantity protection accelerates the action outlet and the alarm mode of the light gas time delay 1 protection and the light gas time delay 1 protection.
Heavy gas protection tripping short-time locking function:
this light gas protection device design has heavy gas protection tripping operation short-time shutting function, promptly: after the state acquisition module acquires the state acquisition signal of the online oil filter of the transformer, the light gas comprehensive protection device judges that the online oil filter of the transformer is started through the operation and abnormity judgment unit, or judges that the circulating motor of the transformer is started through the state judgment module after acquiring the state acquisition signal of the circulating motor of the transformer, then the locking heavy gas 1 protection trip and the locking heavy gas 1 protection trip are started, the locking time is B, the B is settable delay, and the setting range is: 0 to 1 second, precision in milliseconds, and step size in milliseconds. In the heavy gas tripping and locking time, after the heavy gas 1 contact state acquisition signal of the transformer or the heavy gas 1 contact state acquisition signal of the transformer is acquired by the light gas protection device through the state acquisition module, if the heavy gas 1 action of the transformer or the heavy gas 2 action of the transformer is judged, the light gas protection device only sends out the heavy gas 1 alarm signal of the transformer or the heavy gas 2 alarm signal of the transformer, and the tripping outlet and the locking outlet are not started.
The design of the heavy gas protection tripping short-time locking function is to prevent the heavy gas protection misoperation when the transformer oil circulating motor is started or the transformer online oil filter is started, and the function is a settable option.
Heavy gas protection tripping and locking functions:
this light gas protection device design has heavy gas protection tripping operation shutting function, promptly: after transformer oil and pipeline maintenance state acquisition signals are acquired by the state acquisition module, the state judgment module judges that the transformer carries out maintenance pressing plate investment of an oil circuit or related pipelines on line or judges that the transformer carries out oil circuit or related pipelines on line through intelligent assistance, the state judgment module starts locking heavy gas 1 protection tripping and locking heavy gas 2 protection tripping, if the transformer judges that the maintenance pressing plate investment of the oil circuit or related pipelines on line exits or judges that the transformer carries out oil circuit or related pipelines on line and finishes working, the state judgment module stops locking heavy gas 1 protection tripping and locking heavy gas 2 protection tripping. In the heavy gas tripping and locking time, if the heavy gas 1 action of the transformer or the heavy gas 2 action of the transformer is judged, the light gas protection device only sends out a heavy gas 1 alarm signal of the transformer or a heavy gas 2 alarm signal of the transformer, and does not start a tripping outlet and a locking outlet.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A light gas protection device, comprising:
the power supply comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module and an output protection module;
the state acquisition module, the power supply side signal acquisition module and the output protection module are all connected with the state judgment module;
the state acquisition module is used for acquiring light gas contact state data and transformer operation parameters and transmitting the light gas contact state data and the transformer operation parameters to the state judgment module;
the power supply side signal acquisition module is used for acquiring the operation parameters of the power supply side of the transformer and transmitting the operation parameters to the state judgment module;
the state judging module respectively judges whether abnormality exists according to the state data, the transformer operation parameters and the operation parameters of the transformer power supply side, and if the abnormality exists, the output protection module is warned to enable the output protection module to perform corresponding protection actions.
2. The light gas protection device according to claim 1, wherein the state collection module comprises a light gas contact state collection unit connected to the state judgment module, and the light gas contact state collection unit is used for collecting a first light gas contact state, a second light gas contact state and a third light gas contact state.
3. The light gas protection device of claim 1, wherein the collection module comprises a transformer operation parameter collection unit connected to the state judgment module, and is configured to collect a state parameter of a circuit breaker on a power supply side of the transformer, an online oil filtration state parameter of the transformer, and a state parameter of a transformer oil circulation motor.
4. The light gas protection device of claim 3, wherein the transformer operation parameter acquisition unit is further configured to acquire an electric quantity protection starting signal of the transformer, a transformer oil and pipeline maintenance state, a first heavy gas contact state of the transformer, and a second heavy gas contact state of the transformer.
5. The light gas protection device of claim 1, wherein the power supply side signal acquisition module comprises a current acquisition unit and a voltage acquisition unit which are connected with the state judgment module; the current acquisition unit is used for acquiring three-phase current at the power supply side of the transformer and zero-sequence current at the power supply side of the transformer; the voltage acquisition unit is used for acquiring the three-phase voltage of the power supply side of the transformer.
6. A light gas protection device according to claim 1, wherein the output protection module comprises a high voltage side trip contact, a transformer medium voltage side trip contact and a transformer low voltage side trip contact connected in parallel with each other.
7. The light gas protection device according to claim 1, wherein the output protection module comprises a light gas protection trip contact, a light gas protection alarm contact and a light gas abnormality alarm contact which are connected in parallel with each other.
8. A light gas protection device according to claim 1, wherein the output protection module comprises: the gas protection action tripping locking power supply side closing contact and the locking opposite side station closing contact are connected in parallel.
9. The light gas protection device according to claim 2, wherein the light gas contact state collecting unit is further configured to: the light gas time delay 1 protection is formed by action time difference of a first light gas contact and a second light gas contact, the light gas time delay 2 protection is formed by action time difference of the second light gas contact and a third light gas contact, 2 sections of settable time delay are designed on the light gas time delay 1 protection, and 2 sections of settable time delay are designed on the light gas time delay 2 protection, so that tripping or alarming can be selected.
10. A light gas protection device according to any one of claims 3-5, wherein the output protection module is further configured to:
after a breaker at the power supply side is switched on, accelerating light gas to delay 1 protective tripping and accelerating light gas to delay 2 protective tripping;
after the online oil filtering operation of the transformer, accelerating light gas to delay 1 protective trip and accelerating light gas to delay 2 protective trip;
after the transformer oil circulating motor operates, accelerating light gas to delay 1 protective tripping and accelerating light gas to delay 2 protective tripping;
after the transformer oil and the pipeline are in a maintenance state, accelerating light gas to delay 1 protective tripping and accelerating light gas to delay 2 protective tripping;
after the transformer is started with an electric quantity protection action, accelerating light gas delay 1 to protect tripping and accelerating light gas delay 2 to protect tripping;
after the transformer autonomous electric quantity protection action, the light gas is accelerated to carry out delayed 1 protection tripping and the light gas is accelerated to carry out delayed 2 protection tripping.
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| CN202020146680.9U CN211405454U (en) | 2020-01-23 | 2020-01-23 | Light gas protection device |
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| CN202020146680.9U CN211405454U (en) | 2020-01-23 | 2020-01-23 | Light gas protection device |
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