CN114221430A - Main transformer section switching method and device for transformer substation - Google Patents
Main transformer section switching method and device for transformer substation Download PDFInfo
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- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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Abstract
The invention discloses a main transformer section switching method of a transformer substation. The main transformer section switching method of the transformer substation comprises the following steps: acquiring operation parameters of a transformer substation; determining the operation state of a main transformer according to the operation parameters; wherein the running state comprises the parallel running state of a normal main transformer; and calculating the main transformer section of the normal main transformer in parallel operation according to the operation state, and switching to the main transformer section of the transformer substation. The technical scheme provided by the invention can calculate the load when the normal main transformers run in parallel according to the current main transformer running state, and can be used as the current main transformer section of the transformer substation to switch the main transformer section of the transformer substation into the current main transformer section, so that the main transformer section can be automatically switched in time according to the current main transformer running state, the situation that the main transformer section is out of limit when the running mode of the transformer substation is changed is reduced, meanwhile, the manual switching of the main transformer section is avoided, the switching accuracy of the main transformer section is ensured, and the main transformer running safety of the transformer substation is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of operation of power system substations, in particular to a method and a device for switching main transformer sections of a substation.
Background
A substation is an electrical facility in an electrical grid for transforming voltage, receiving and distributing electrical energy, controlling the flow of electrical power, and regulating voltage. With the rapid development of local economy, the load of power grids in many regions is rapidly increased, in order to ensure the safety and reliability of power supply, 2 or 3 transformers are generally installed, and a mode that 220kV transformers run in parallel is adopted in many power grids.
When the transformer is powered off or the operation mode is changed, and the main transformer section is changed, if the correct section is not started, the abnormal condition of the power grid is not monitored, and under the condition of an accident, the overload of the transformer is caused, the equipment is damaged seriously, and the safe and stable operation of the power grid is threatened.
At present, when a transformer is in power failure or the operation mode is changed, in order to ensure that the transformer substation is not overloaded under the accident condition, the section is set according to the overload capacity of the transformer substation, and if the transformer substation is in power failure or the operation mode is changed, the section of the transformer substation needs to be reset. The cross section of the transformer is started manually, potential safety hazards exist, if the cross section is not started or the cross section is wrongly calculated, the cross section of the transformer is not found out to be out of limit in time, when one transformer is cut off due to faults or other reasons, all loads are transferred to other transformers, and at the moment, the residual running transformers are possibly overloaded seriously, and the equipment safety is seriously damaged.
Disclosure of Invention
The invention provides a method and a device for switching main transformer sections of a transformer substation, which are used for realizing the automatic calculation and switching of the main transformer sections based on an operation mode, reducing wrong sections of transformers started manually and improving the operation safety of main transformers of the transformer substation.
In a first aspect, an embodiment of the present invention provides a method for switching a main transformer section of a transformer substation, where the method for switching a main transformer section of a transformer substation includes: acquiring operation parameters of a transformer substation; determining the operation state of a main transformer according to the operation parameters; wherein the running state comprises the parallel running state of a normal main transformer; and calculating the main transformer section of the normal main transformer in parallel operation according to the operation state, and switching to the main transformer section of the transformer substation.
Optionally, determining the operating state of the main transformer according to the operating parameters includes: determining a main transformer which normally runs in the transformer substation according to the running parameters to serve as a normal main transformer; and determining the parallel operation state between the normal main transformers according to the bus coupler switch state of the normal main transformers.
Optionally, determining the parallel operation state between the normal main transformers according to the bus coupler switch state of the normal main transformers includes: if the bus coupler switch of the bus at the variable height side of the normal main transformer is in an operating state and the bus coupler switch of the bus at the variable middle side of the normal main transformer is in an operating state, the normal main transformer is in a parallel operating state; if the bus coupler switch of the bus at the variable-height side of the normal main transformer is in an operating state and the bus coupler switch of the bus at the variable-middle side of the normal main transformer is in a standby state, the normal main transformer on the same bus at the variable-middle side is in a parallel operating state; if the bus coupler switch of the bus at the height changing side of the normal main transformer is in a standby state and the bus coupler switch of the bus at the middle changing side of the normal main transformer is in a standby state, the normal main transformers on the same bus at the height changing side and the same bus at the middle changing side are in a parallel operation state.
Optionally, if the bus coupler switch of the variable-height side bus of the normal main transformer is in a standby state, and the bus coupler switch of the variable-middle side bus of the normal main transformer is in an operating state, a warning signal is sent out.
Optionally, calculating a main transformer section of the normal main transformer in parallel operation according to the operation state includes: acquiring a first section of a normal main transformer which runs in parallel on the same bus at the height changing side, a second section of the normal main transformer which runs in parallel on the same bus at the middle changing side and a third section of the normal main transformer when a main transformer side switch is disconnected; and selecting the minimum value of the first section, the second section and the third section as a main transformer section in which the normal main transformers run in parallel.
Optionally, the obtaining a first section of a normal main transformer running in parallel on the same bus on the high-side includes: and disconnecting the bus coupler switches on different buses at the variable height side respectively, and acquiring the sections of the normal main transformer on the different buses at the variable height side respectively as first sections.
Optionally, the obtaining a second section of a normal main transformer running in parallel on the same bus at the middle side of the transformer includes: and disconnecting the bus coupler switches on different buses on the middle side of the transformer respectively, and acquiring the sections of the normal main transformers on the different buses on the middle side of the transformer respectively as second sections.
Optionally, obtaining the operation parameters of the substation includes: and acquiring the remote measuring parameters and remote signaling parameters of the transformer substation.
In a second aspect, an embodiment of the present invention further provides a device for switching a main transformer section of a transformer substation, including: the acquisition module is used for acquiring the operation parameters of the transformer substation; the determining module is used for determining the operation state of the main transformer according to the operation parameters; wherein the running state comprises the parallel running state of a normal main transformer; and the switching module is used for calculating the main transformer section of the normal main transformer in parallel operation according to the operation state and switching the section into the main transformer section of the transformer substation.
Optionally, the determining module includes: the normal main transformer determining unit is used for determining a main transformer which normally runs in the transformer substation according to the running parameters and is used as a normal main transformer; and the parallel operation state determining unit is used for determining the parallel operation state between the normal main transformers according to the bus coupler switch state of the normal main transformers.
According to the method for switching the main transformer sections of the transformer substation, the operation parameters of the transformer substation are obtained, the operation state of the main transformer is determined according to the operation parameters, the main transformer sections of the normal main transformers in parallel operation are calculated according to the operation state, and the main transformer sections of the transformer substation are switched. The technical scheme provided by the embodiment of the invention can calculate the load when the normal main transformers run in parallel according to the current main transformer running state, and can be used as the current main transformer section of the transformer substation to switch the main transformer section of the transformer substation into the current main transformer section, so that the main transformer section can be automatically switched in time according to the current main transformer running state, the situation that the main transformer section is out of limit when the running mode of the transformer substation is changed is reduced, meanwhile, the manual switching of the main transformer section is avoided, the switching accuracy of the main transformer section is ensured, and the main transformer running safety of the transformer substation is improved.
Drawings
Fig. 1 is a flowchart of a main transformer section switching method of a transformer substation according to an embodiment of the present invention;
fig. 2 is a wiring circuit diagram of a typical 220KV substation according to an embodiment of the present invention;
fig. 3 is a flowchart of a main transformer section switching method of a transformer substation according to a second embodiment of the present invention;
fig. 4 is a flowchart for determining the parallel operation status between the normal main transformers according to the second embodiment of the present invention;
fig. 5 is a flowchart of a main transformer section switching method of a transformer substation according to a third embodiment of the present invention;
fig. 6 is a block diagram of a main transformer section switching device of a transformer substation according to a fourth embodiment of the present invention;
fig. 7 is a block diagram of a main transformer section switching device of another substation according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a method for switching a main transformer section of a transformer substation according to an embodiment of the present invention, where this embodiment is applicable to a situation of calculating a main transformer section of the transformer substation, and the method can be executed by a main transformer section switching device of the transformer substation, and specifically includes the following steps:
s110, obtaining operation parameters of the transformer substation;
the transformer station may include a plurality of transformers, and each transformer may be a main transformer. In the operation process of the transformer substation, under the normal condition, a plurality of main transformers can operate in parallel to ensure the operation reliability of the transformer substation. For example, in a 220KV substation, the transformer may be a three-winding main transformer, and parallel operation between different main transformers may be set by setting a connection relationship between a high-side bus and a middle-side bus of the main transformer and a connection relationship between the middle-side bus and the middle-side bus of the main transformer. In the transformer substation, the operation parameters may be parameters for characterizing an operation state of a main transformer in the transformer substation, and for example, the operation parameters may include state parameters of a variable height side switch of the main transformer, a variable height side bus switch, a variable center side switch of the main transformer, and a variable center side bus switch to determine the operation state of the main transformer.
S120, determining the operation state of the main transformer according to the operation parameters; wherein the running state comprises the parallel running state of a normal main transformer;
the operation parameters comprise state parameters of a variable height side switch, a variable height side bus switch, a variable middle side switch and a variable middle side bus switch of each main transformer. After the operation parameters are obtained, whether the main transformers are in a normal operation state or not can be determined according to the on-off state or the off-off state of each switch, and whether the at least two main transformers in normal operation are in a parallel operation state or not is judged on the basis that the at least two main transformers are in the normal operation state. When the main transformer is in normal operation, the main transformer can normally carry out load. When the at least two main transformers which normally run are in the parallel running state, the at least two main transformers which normally run in parallel can be loaded, and the overall total load is the sum of the loads of the at least two main transformers which normally run in parallel. Therefore, the load of the transformer substation can be determined according to the normal operation state and the parallel operation state of the main transformer.
Exemplarily, fig. 2 is a wiring circuit diagram of a typical 220KV substation according to a first embodiment of the present invention, and referring to fig. 1 and fig. 2, the substation includes three main transformers, which are a first main transformer #1, a second main transformer #2 and a third main transformer #3, respectively, and the capacity of the first main transformer #1 is set to be a, the overload capacity of the first main transformer #1 is x times of the main transformer capacity, the capacity of the second main transformer #2 is B, the overload capacity of the second main transformer #2 is y times of the main transformer capacity, the capacity of the third main transformer #3 is C, and the overload capacity of the third main transformer #3 is z times of the main transformer capacity. According to the operation parameters, the normal operation of a first main transformer #1 main transformer, a second main transformer #2 main transformer and a third main transformer #3 main transformer can be determined, and the normal load operation of the first main transformer #1 main transformer, the second main transformer #2 main transformer and the third main transformer #3 main transformer can be realized. The section value of the main transformers is A multiplied by x + B multiplied by y + C multiplied by z, and the first main transformer #1, the second main transformer #2 and the third main transformer #3 can normally carry out load. And if the first main transformer #1 is cut off, transferring all the load to the second main transformer #2 and the third main transformer #3, wherein the main transformer section value is B multiplied by y + C multiplied by z. Similarly, if the second main transformer #2 is cut off, the main transformer section value at this time is A × x + C × z by analogy.
And S130, calculating the main transformer section of the normal main transformer in parallel operation according to the operation state, and switching to the main transformer section of the transformer substation.
The section mainly refers to the limit of several channels for transmitting electric energy and the respective and total transmission capacity when the trans-regional power grid supplies power. The main section of a substation is the limit of the individual or total transformer transfer capacity of the transformer that can provide the load. The main transformer section value is the sum of the capacity multiplied by the overload capacity of all the main transformers in the residual operation. When the transformer substation normally operates, the main transformer section of the transformer substation is the sum of loads of all main transformers, after the operation mode of the transformer substation changes, the loads of the normal main transformers in parallel operation can be calculated according to the current main transformer operation state, and the loads are used as the current main transformer section of the transformer substation, the main transformer section of the transformer substation is switched into the current main transformer section, so that the main transformer section can be automatically switched in time according to the current main transformer operation state, the out-of-limit condition of the main transformer section when the operation mode of the transformer substation changes is reduced, meanwhile, the manual switching of the main transformer section is avoided, the switching accuracy of the main transformer section is ensured, and the main transformer operation safety of the transformer substation is improved.
According to the method for switching the main transformer sections of the transformer substation, the operation parameters of the transformer substation are obtained, the operation state of the main transformer is determined according to the operation parameters, the main transformer sections of the normal main transformers in parallel operation are calculated according to the operation state, and the main transformer sections of the transformer substation are switched. The technical scheme provided by the embodiment of the invention can calculate the load when the normal main transformers run in parallel according to the current main transformer running state, and can be used as the current main transformer section of the transformer substation to switch the main transformer section of the transformer substation into the current main transformer section, so that the main transformer section can be automatically switched in time according to the current main transformer running state, the situation that the main transformer section is out of limit when the running mode of the transformer substation is changed is reduced, meanwhile, the manual switching of the main transformer section is avoided, the switching accuracy of the main transformer section is ensured, and the main transformer running safety of the transformer substation is improved.
Example two
Optionally, fig. 3 is a flowchart of a main transformer section switching method of a transformer substation according to a second embodiment of the present invention, referring to fig. 3, the step of determining the operating state of a main transformer is further detailed on the basis of the first embodiment of the present invention, and the operating state of the main transformer is determined according to the operating parameters, where the method includes the following steps:
s110, obtaining operation parameters of the transformer substation;
s121, determining a main transformer which normally runs in the transformer substation according to the running parameters to serve as a normal main transformer;
specifically, the normal main becomes a main transformer that normally operates. When the state of the main transformer is determined, the state can be determined through the switch states of different sides of the main transformer. Illustratively, when the main transformer is changed into a three-winding main transformer, and a main transformer high-side switch and a variable middle-side switch are in a closed state, the parallel operation state between the normal main transformers is determined according to the bus-coupled switch state of the normal main transformers. For example, for a three-winding main transformer, if a main transformer high-side switch and a middle-side switch are in operation, a parallel operation state is defined as a normal operation state; if only the high-side switch is operated, the parallel operation state is defined as a high-side charging operation state; and the parallel operation state is defined as the variable middle side charging operation state only by the operation of the variable middle side switch.
And S122, determining the parallel operation state between the normal main transformers according to the bus coupler switch state of the normal main transformers.
Wherein, the main transformer is connected with the bus through the bus coupler switch. The connection relation between the main transformer and the bus can be determined through the bus coupler switch between the main transformer and the bus and the switches on different sides of the main transformer, and then the parallel running state between the main transformers can be determined.
Optionally, fig. 4 is a flowchart for determining parallel operation states between normal main transformers according to a second embodiment of the present invention, and referring to fig. 4, determining parallel operation states between normal main transformers according to a state of a buscouple switch of the normal main transformers includes the following steps:
s1221, if the bus coupler switch of the variable height side bus of the normal main transformer is in an operating state and the bus coupler switch of the variable middle side bus of the normal main transformer is in an operating state, the normal main transformer is in a parallel operating state;
when the running state of the bus coupler switch is that the equipment is electrified, the bus coupler switch, the bus side disconnecting link and the main transformer side disconnecting link are all in closed positions. If the bus coupler switch of the variable-height side bus of the normal main transformer is in an operating state and the bus coupler switch of the variable-middle side bus of the normal main transformer is in an operating state, at the moment, the bus coupler switch, the bus side disconnecting link and the main transformer side disconnecting link are all in a closed position, the main transformer normally works, and at the moment, the normal main transformer is in a parallel operating state.
S1222, if the bus coupler switch of the bus at the height changing side of the normal main transformer is in an operating state and the bus coupler switch of the bus at the middle changing side of the normal main transformer is in a standby state, the normal main transformer on the same bus at the middle changing side is in a parallel operating state;
the standby state may include a hot standby state or a cold standby state, among others. The hot standby state can be that the bus gang switch is in the off position, and bus side switch and main transformer side switch are in the closed position. And in the cold standby state, the bus-bar switch is in the off position, and the bus side disconnecting link and the main transformer side disconnecting link are in the off position. The same bus bar on the middle side of the transformer can be a line for connecting the main transformer with the medium voltage bus bar.
Specifically, if the bus coupler switch of the high-side bus of the normal main transformer is in an operating state, and the bus coupler switch of the middle-side bus of the normal main transformer is in a hot standby state, the normal main transformer on the same bus of the middle side is in a parallel operating state. And if the bus coupler switch of the bus at the variable-height side of the normal main transformer is in an operating state and the bus coupler switch of the bus at the variable-middle side of the normal main transformer is in a cold standby state, the normal main transformer on the same bus at the variable-middle side is in a parallel operating state.
And S1223, if the bus coupler switch of the bus at the variable height side of the normal main transformer is in a standby state and the bus coupler switch of the bus at the variable middle side of the normal main transformer is in a standby state, the normal main transformer on the same bus at the variable height side and the same bus at the variable middle side is in a parallel operation state.
The same bus on the high-voltage side can be a line for connecting a main transformer and a high-voltage bus.
Specifically, if the bus coupler switch of the high-side bus of the normal main transformer is in a hot standby state and the bus coupler switch of the middle-side bus of the normal main transformer is in a hot standby state, the normal main transformers on the same bus of the high-side and the middle-side are in a parallel operation state. If the bus coupler switch of the bus at the variable-height side of the normal main transformer is in a hot standby state and the bus coupler switch of the bus at the variable-middle side of the normal main transformer is in a cold standby state, the normal main transformers on the same bus at the variable-height side and the same bus at the variable-middle side are in a parallel operation state. If the bus coupler switch of the bus at the variable-height side of the normal main transformer is in a cold standby state and the bus coupler switch of the bus at the variable-middle side of the normal main transformer is in a hot standby state, the normal main transformers on the same bus at the variable-height side and the same bus at the variable-middle side are in a parallel operation state. If the bus coupler switch of the bus at the variable-height side of the normal main transformer is in a cold standby state and the bus coupler switch of the bus at the variable-middle side of the normal main transformer is in a cold standby state, the normal main transformers on the same bus at the variable-height side and the same bus at the variable-middle side are in a parallel operation state.
And the bus coupler switch controls the two buses to operate in a grid-connected mode or a grid-separated mode. When one bus and the line thereof have faults in the bus grid-connected operation, the protection action timely separates the bus-connected switch, so that the normal power supply of the other bus can be ensured, and the power failure range is reduced. When switching operation, the bus tie switch is closed to carry out equipotential uninterrupted operation, when the circuit breaker has a fault, a line where the fault circuit breaker is located can be connected into an empty bus, and the bus tie switch replaces the circuit switch to operate.
And S130, calculating the main transformer section of the normal main transformer in parallel operation according to the operation state, and switching to the main transformer section of the transformer substation.
Optionally, if the bus coupler switch of the variable-height side bus of the normal main transformer is in a standby state, and the bus coupler switch of the variable-middle side bus of the normal main transformer is in an operating state, a warning signal is sent out.
If the bus coupler switch of the variable-height side bus of the normal main transformer is in a hot standby state, and the bus coupler switch of the variable-middle side bus of the normal main transformer is in an operating state, and the section value of the main transformer is larger than or equal to the preset threshold value of the main transformer, a warning signal is sent. If the bus coupler switch of the variable-height side bus of the normal main transformer is in a cold standby state and the bus coupler switch of the variable-middle side bus of the normal main transformer is in an operating state, and the section value of the main transformer is larger than or equal to the preset threshold value of the main transformer, a warning signal is sent.
EXAMPLE III
Optionally, fig. 5 is a flowchart of a method for switching a main transformer section of a transformer substation according to a third embodiment of the present invention, and referring to fig. 5, the step of determining an operating state of a main transformer is further detailed based on the first embodiment of the present invention, and a main transformer section in parallel operation of a normal main transformer is calculated according to the operating state, where the method includes the following steps:
s110, obtaining operation parameters of the transformer substation;
s120, determining the operation state of the main transformer according to the operation parameters; wherein the running state comprises the parallel running state of a normal main transformer;
s131, acquiring a first section of a normal main transformer which runs in parallel on the same bus at the height changing side, a second section of the normal main transformer which runs in parallel on the same bus at the middle changing side and a third section when a main transformer side switch of the normal main transformer is disconnected;
specifically, after a certain main transformer is cut off, the main transformers on the same bus on the variable height side run in parallel, the main transformers on the same bus on the variable middle side run in parallel, main transformer side switches of the normal main transformers are disconnected, and the main transformer section values are the sum of the capacity multiplied by the overload capacity of all the main transformers in the residual operation. The acquired section value of the normal main transformers running in parallel on the same bus on the variable height side is a first section, the acquired section value of the normal main transformers running in parallel on the same bus on the variable middle side is a second section, and the acquired section value of the normal main transformers when the main transformer side switches are disconnected is a third section.
Optionally, the obtaining a first section of a normal main transformer running in parallel on the same bus on the high-side includes: and disconnecting the bus coupler switches on different buses at the variable height side respectively, and acquiring the sections of the normal main transformer on the different buses at the variable height side respectively as first sections.
Illustratively, with continued reference to fig. 2, the bus tie switches on the high side bus are turned off, respectively, such as: when the 220kV buscouple switch on the 220kV #1 bus is disconnected, the main transformer on the other section of bus bears all loads, the first section value is the sum of the capacities of the main transformers in the residual operation multiplied by the overload capacity, when the 220kV buscouple switch on the 220kV #2 bus is disconnected, the main transformer on the other section of bus bears all loads, and the first section value is the sum of the capacities of all the main transformers in the residual operation multiplied by the overload capacity.
Optionally, the obtaining a second section of a normal main transformer running in parallel on the same bus at the middle side of the transformer includes: and disconnecting the bus coupler switches on different buses on the middle side of the transformer respectively, and acquiring the sections of the normal main transformers on the different buses on the middle side of the transformer respectively as second sections.
Illustratively, with continued reference to fig. 2, the bus tie switches on the different buses on the middle side are respectively opened, such as: when the 110kV buscouple switch on the 110kV #1 bus is disconnected, the main transformer on the other section of bus bears all loads, the first section value is the sum of the capacity of the residual operating main transformers multiplied by the overload capacity, when the 110kV buscouple switch on the 110kV #2 bus is disconnected, the main transformer on the other section of bus bears all loads, and the section value is the sum of the capacity of the residual operating main transformers multiplied by the overload capacity.
S132, selecting the minimum value in the first section, the second section and the third section as a main transformer section in which the normal main transformer runs in parallel.
Specifically, each main transformer side switch of the main transformers is disconnected, and the third section is the sum of the capacity multiplied by the overload capacity of the residual operating main transformers. Not only should guarantee that holistic main transformer section is less than the preset threshold value of main transformer, still guarantee to remain every main transformer section all to be less than the preset threshold value of single main transformer. And selecting the minimum value in the first section, the second section and the third section as the section of the normal main transformer which runs in parallel, wherein the minimum value in the first section, the second section and the third section can ensure that each residual main transformer is smaller than the preset threshold value of a single main transformer.
Optionally, obtaining the operation parameters of the substation includes: and acquiring the remote measuring parameters and remote signaling parameters of the transformer substation.
Specifically, the telemetering parameter is a specific numerical value of an analog quantity measured by the mutual inductor, the remote signaling parameter is a switch state 1 or 0, if the remote signaling parameter is the switch state 1, the switch state of the bus tie switch is a conducting state, and if the remote signaling parameter is the switch state 0, the switch state of the bus tie switch is a disconnecting state. And information such as power, voltage, current and the like of the transformer substation can be acquired according to the telemetering parameters. The state parameters of a variable height side switch, a variable height side bus switch, a variable middle side switch and a variable middle side bus switch of the main transformer can be obtained through remote signaling parameters, and then the running state of the main transformer is determined.
Example four
A fourth embodiment of the present invention provides a main transformer section switching device of a transformer substation, fig. 6 is a block diagram of a main transformer section switching device of a transformer substation provided in the fourth embodiment of the present invention, and referring to fig. 6, the main transformer section switching device of the transformer substation includes: an obtaining module 110, configured to obtain an operation parameter of a substation; a determining module 120, configured to determine an operating state of the main transformer according to the operating parameter; wherein the running state comprises the parallel running state of a normal main transformer; and the switching module 130 is used for calculating the main transformer section of the normal main transformer in parallel operation according to the operation state and switching the main transformer section into the main transformer section of the transformer substation.
The device can execute the main transformer section switching method of the transformer substation provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Optionally, fig. 7 is a block diagram of a structure of a main transformer section switching device of another substation according to a fourth embodiment of the present invention, and referring to fig. 7, the determining module includes: a normal main transformer determining unit 121, configured to determine a main transformer that normally operates in the transformer substation according to the operation parameters, and use the determined main transformer as a normal main transformer; and the parallel operation state determining unit 122 is used for determining the parallel operation state between the normal main transformers according to the bus coupler switch state of the normal main transformers.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A main transformer section switching method of a transformer substation is characterized by comprising the following steps:
acquiring operation parameters of a transformer substation;
determining the operation state of the main transformer according to the operation parameters; wherein the running state comprises a parallel running state of a normal main transformer;
and calculating the main transformer section of the normal main transformer in parallel operation according to the operation state, and switching to the main transformer section of the transformer substation.
2. The method for switching the main transformer section of the transformer substation according to claim 1, wherein determining the operation state of the main transformer according to the operation parameters comprises:
determining a main transformer which normally runs in the transformer substation according to the running parameters to serve as the normal main transformer;
and determining the parallel operation state between the normal main transformers according to the bus coupler switch state of the normal main transformers.
3. The method for switching the main transformer sections of the transformer substation according to claim 2, wherein the step of determining the parallel operation state between the normal main transformers according to the bus tie switch state of the normal main transformers comprises the following steps:
if the bus coupler switch of the bus at the variable height side of the normal main transformer is in an operating state and the bus coupler switch of the bus at the variable middle side of the normal main transformer is in an operating state, the normal main transformer is changed into a parallel operating state;
if the bus coupler switch of the bus at the variable height side of the normal main transformer is in an operating state and the bus coupler switch of the bus at the variable middle side of the normal main transformer is in a standby state, the normal main transformers on the same bus at the variable middle side are in a parallel operating state;
and if the bus coupler switch of the bus at the variable height side of the normal main transformer is in a standby state and the bus coupler switch of the bus at the variable middle side of the normal main transformer is in a standby state, the normal main transformers on the same bus at the variable height side and the same bus at the variable middle side are in a parallel operation state.
4. The method according to claim 3, wherein a warning signal is issued if the bus tie switch of the high-side bus of the normal main transformer is in a standby state and the bus tie switch of the medium-side bus of the normal main transformer is in an operating state.
5. The method for switching the main transformer sections of the transformer substation according to any one of claims 1 to 4, wherein calculating the main transformer sections of the normal main transformers in parallel operation according to the operation state comprises:
acquiring a first section of the normal main transformer running on the same bus on the height-changing side in parallel, a second section of the normal main transformer running on the same bus on the middle-changing side in parallel and a third section of the normal main transformer when a main transformer side switch is disconnected;
and selecting the minimum value of the first section, the second section and the third section as the section of the main transformer in parallel operation of the normal main transformer.
6. The method for switching the main transformer sections of the transformer substation according to claim 5, wherein the step of obtaining the first section of the normal main transformer which runs in parallel on the same bus on the high-side comprises the following steps:
and disconnecting the bus coupler switches on different buses at the variable height side respectively, and acquiring the sections of the normal main transformer on the different buses at the variable height side respectively as the first sections.
7. The method for switching the main transformer sections of the transformer substation according to claim 5, wherein the step of obtaining a second section of the normal main transformer which runs in parallel on the same bus at the middle transformer side comprises the following steps:
and disconnecting the bus coupler switches on different buses on the middle side of the transformer respectively, and acquiring the sections of the normal main transformer on the different buses on the middle side of the transformer respectively as the second sections.
8. The method for switching the main transformer sections of the transformer substation according to claim 1, wherein the obtaining of the operation parameters of the transformer substation comprises:
and acquiring the remote measuring parameters and remote signaling parameters of the transformer substation.
9. The utility model provides a main section auto-change over device that becomes of transformer substation which characterized in that includes:
the acquisition module is used for acquiring the operation parameters of the transformer substation;
the determining module is used for determining the operation state of the main transformer according to the operation parameters; wherein the running state comprises a parallel running state of a normal main transformer;
and the switching module is used for calculating the main transformer section of the normal main transformer in parallel operation according to the operation state and switching the main transformer section into the main transformer section of the transformer substation.
10. The apparatus of claim 9, wherein the determining module comprises:
the normal main transformer determining unit is used for determining a main transformer which normally runs in the transformer substation according to the running parameters and is used as the normal main transformer;
and the parallel operation state determining unit is used for determining the parallel operation state between the normal main transformers according to the bus coupler switch state of the normal main transformers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111535556.7A CN114221430A (en) | 2021-12-15 | 2021-12-15 | Main transformer section switching method and device for transformer substation |
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| CN202111535556.7A CN114221430A (en) | 2021-12-15 | 2021-12-15 | Main transformer section switching method and device for transformer substation |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1348970A1 (en) * | 2002-03-26 | 2003-10-01 | ABB Schweiz AG | Check for plausibility of current transformers in substations |
| CN107681780A (en) * | 2017-09-07 | 2018-02-09 | 广东电网有限责任公司佛山供电局 | A kind of power network section monitors and turns to supply tactful intelligent generating system and method |
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2021
- 2021-12-15 CN CN202111535556.7A patent/CN114221430A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1348970A1 (en) * | 2002-03-26 | 2003-10-01 | ABB Schweiz AG | Check for plausibility of current transformers in substations |
| CN107681780A (en) * | 2017-09-07 | 2018-02-09 | 广东电网有限责任公司佛山供电局 | A kind of power network section monitors and turns to supply tactful intelligent generating system and method |
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