CN105552884A - Method and system for controlling double-busbar substation from parallel operation to split operation - Google Patents
Method and system for controlling double-busbar substation from parallel operation to split operation Download PDFInfo
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- CN105552884A CN105552884A CN201510947192.1A CN201510947192A CN105552884A CN 105552884 A CN105552884 A CN 105552884A CN 201510947192 A CN201510947192 A CN 201510947192A CN 105552884 A CN105552884 A CN 105552884A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
Abstract
The invention discloses a method and a system for controlling a double-busbar substation from a parallel operation to a split operation. Switching from the parallel operation to the split operation only needs to be carried out according to a switching instruction and various switch states by obtaining various switch states; manual operation from the parallel operation to the split operation is not needed; intervention of an operator for judgment is not needed; the split operation of busbars is restored; the operation time is shortened when the operational safety is ensured; the power-off time of a customer is shortened to the greatest extent; and the index requirements on the safety and the reliability are met. By the method of firstly turning off a busbar switch and then turning on a main transformer switch, the condition of fault explosion of the switch can be effectively avoided within the substation of which a short-circuit current exceeds the standard; and the power supply safety is ensured.
Description
Technical field
The present invention relates to field of power system control, particularly a kind of double-bus transformer station is by the control method and the system that turn fanout operation side by side.
Background technology
Present Domestic Substation Operating generally adopts manually-operated method, operating personnel carry out calling out the names of those voted for while counting ballot-slips and answer song according to the content of operation order, manual operation item by item, it is long to there is the operating time in the method, the correctness of operation depends on the human factors such as the experience of operating personnel, sense of responsibility and the state of mind, there is the problem of erroneous judgement, misoperation.
As shown in Figure 1, in the transformer station of double bus scheme, comprise the first main transformer, the second main transformer, the first step-down switch, the second step-down switch, bus connection switch, the first bus, the second bus, the first mains switch and second source switch, first main transformer is connected with the first bus by the first step-down switch, second main transformer is connected with the second bus by the second step-down switch, first bus is connected with the second bus by bus connection switch, first bus is connected with load by the first mains switch, and the second bus is connected with load by second source switch.When wherein a main transformer overhauls, corresponding low-pressure side bus load is powered by another main transformer side by side, namely powers side by side, such as, when the first main transformer maintenance, the first bus is powered by the second main transformer, when maintenance completes, then need to recover fanout operation, the first bus transfers the first main transformer to and powers, when the second main transformer maintenance, second bus is powered by the first main transformer, when maintenance completes, then need to recover fanout operation, the second bus transfers the second main transformer to and powers.Routine is the step-down switch that first closes, then disconnects bus connection switch.But when the short circuit current arranged side by side in system exceedes the drop-out current of switch, may occur cannot the situation of cutting-off of short-circuit electric current, there is equipment explosion and jeopardize personal safety, now need first to disconnect bus connection switch, then excise all online mains switches, and then the main transformer step-down switch that closes restores electricity with online mains switch, but employing manual operation, need more than 15 minutes, consuming time longer, reduce power supply reliability index.
Summary of the invention
Based on this, be necessary, for the problem turning apportion side by side and operate length consuming time, to provide the double-bus transformer station shortening the operating time by the control method and the system that turn fanout operation side by side.
Double-bus transformer station, by the control method turning fanout operation side by side, comprises the following steps:
Obtain and turn the switching command of apportion and the on off state of double-bus transformer station side by side, wherein, described on off state comprises bus connection switch state, the first step-down on off state and the second step-down on off state;
When described double-bus transformer station meets the executive condition of described switching command, control described bus connection switch and disconnect, wherein, the executive condition of described switching command comprises described bus connection switch state and is in "on" position;
When described bus connection switch disconnects successfully, and when described first step-down on off state is in separating brake, first mains switch of control connection on the first bus disconnects;
According to the electric current of described first mains switch and the voltage control of described first bus, the first step-down switch closes a floodgate, and is closed a floodgate by described first mains switch disconnected according to the electric current of described first mains switch, the voltage of described first bus and described first step-down on off state;
When described bus connection switch disconnects successfully, and when described second step-down on off state is in separating brake, the second source switch of control connection on the second bus disconnects;
According to the electric current of described second source switch and the voltage control of described second bus, the second step-down switch closes a floodgate, and is closed a floodgate by the described second source switch disconnected according to the electric current of described second source switch, the voltage of described second bus and described second step-down on off state.
The present invention also provides a kind of double-bus transformer station by the control system turning fanout operation side by side, comprising:
Acquisition module, for obtaining the on off state of switching command and the double-bus transformer station turning apportion side by side, wherein, described on off state comprises bus connection switch state, the first step-down on off state and the second step-down on off state;
First control module, for when described double-bus transformer station meets the executive condition of described switching command, control described bus connection switch and disconnect, wherein, the executive condition of described switching command comprises described bus connection switch state and is in "on" position;
Second control module, for disconnecting successfully when described bus connection switch, and when described first step-down on off state is in separating brake, first mains switch of control connection on the first bus disconnects;
3rd control module, close a floodgate for the first step-down switch according to the electric current of described first mains switch and the voltage control of described first bus, and according to the electric current of described first mains switch, the voltage of described first bus and described first step-down on off state, described first mains switch disconnected is closed a floodgate;
4th control module, for disconnecting successfully when described bus connection switch, and when described second step-down on off state is in separating brake, the second source switch of control connection on the second bus disconnects;
5th control module, close a floodgate for the second step-down switch according to the electric current of described second source switch and the voltage control of described second bus, and according to the electric current of described second source switch, the voltage of described second bus and described second step-down on off state, the described second source switch disconnected is closed a floodgate.
Above-mentioned double-bus transformer station is by the control method and the system that turn fanout operation side by side, when double-bus transformer station meets the executive condition of switching command, control bus connection switch disconnects, when bus connection switch disconnects successfully, and when the first step-down on off state is in separating brake, the first main transformer is in maintenance, maintenance completes and needs to transfer the first step-down switch to combined floodgate, thus first mains switch of control connection on the first bus disconnects, and controls the first step-down switch and closes a floodgate, and the first mains switch disconnected is closed a floodgate.When bus connection switch disconnects successfully, and the second step-down on off state is when being in separating brake, second main transformer is in maintenance, maintenance completes and needs to transfer the second step-down switch to combined floodgate, thus the second source switch of control connection on the second bus disconnects, control the second step-down switch to close a floodgate, and the second source switch disconnected is closed a floodgate.By obtaining the state of each switch, only need according to switching command and the switching turning fanout operation according to each on off state side by side, without the need to turning the operation of apportion manually side by side, judgement is got involved without the need to operating personnel, recover bus fanout operation, shorten the operating time while guaranteeing handling safety, client's interruption duration is dropped to minimum as far as possible, meet the index request to safety and reliability.And adopt and first disconnect bus connection switch and to close again main transformer switch, in the transformer station that short circuit current exceeds standard, switch effectively can be avoided to break down the situation of blast, ensure that power supply safety.
Accompanying drawing explanation
Fig. 1 is the structural representation of double-bus transformer station;
Fig. 2 is that the double-bus transformer station of an execution mode is by the flow chart of control method turning fanout operation side by side;
Fig. 3 is that the double-bus transformer station of another execution mode is by the flow chart of control method turning fanout operation side by side;
Fig. 4 is that the double-bus transformer station of an execution mode is by the module map of control system turning fanout operation side by side;
Fig. 5 is that the double-bus transformer station of another execution mode is by the module map of control system turning fanout operation side by side.
Embodiment
Refer to Fig. 1 and Fig. 2, provide a kind of double-bus transformer station of execution mode by the control method turning fanout operation side by side, comprise the following steps:
S100: obtain and turn the switching command of apportion and the on off state of double-bus transformer station side by side.
Wherein, on off state comprises bus connection switch state, the first step-down on off state and the second step-down on off state.When the first main transformer overhauls, need the second main transformer to power to the first bus, when the second main transformer overhauls, need the first main transformer to power to the second bus.When main transformer has overhauled, need to be transformed into original main transformer to carry out apportion and power, operating personnel are at the background computer interface operation of man-machine interaction, click bus by turning fanout operation key side by side, the switching command turning apportion side by side can be produced, obtain this switching command, and obtain the on off state of double-bus transformer station.
S200: when double-bus transformer station meets the executive condition of switching command, controls bus connection switch and disconnects.
Wherein, the executive condition of switching command comprises bus connection switch state and is in "on" position.When bus connection switch state is in "on" position, represents the executive condition tentatively meeting switching command, can subsequent treatment be carried out, namely control bus connection switch and disconnect, thus the first bus and the second bus are disconnected, make double-bus fanout operation.
S300: when bus connection switch disconnects successfully, and when the first step-down on off state is in separating brake, first mains switch of control connection on the first bus disconnects.
But, when controlling bus connection switch and disconnecting, due to the impact of external condition, may cause disconnecting unsuccessfully, only have when bus connection switch disconnects successfully, just carry out subsequent treatment, namely when disconnecting successfully, the state judging which switch in the first step-down switch and the second step-down switch is again in separating brake, namely judge which switch has carried out overhauling and need transhipment row, such as, first step-down on off state is separating brake, represent that the first step-down switch overhauls, need to be transported row, the first mains switch of the first bus on control first step-down switch is then needed first to disconnect.
S400: close a floodgate according to the electric current of the first mains switch and the voltage control first step-down switch of the first bus, and according to the electric current of the first mains switch, the voltage of the first bus and the first step-down on off state, the first mains switch disconnected is closed a floodgate.
After the first mains switch disconnects, then the first step-down switch that closes, turn apportion success side by side, closed a floodgate by the first mains switch disconnected, realizing the first main transformer is load supplying.
S500: when bus connection switch disconnects successfully, and when the second step-down on off state is in separating brake, the second source switch of control connection on the second bus disconnects.
The state judging which switch in the first step-down switch and the second step-down switch is in separating brake, namely judge which switch has carried out overhauling and need transhipment row, when the second step-down on off state is separating brake, represent that the second step-down switch overhauls, need to be transported row, then need the second source switch of the second bus on control second step-down switch first to disconnect.
S600: close a floodgate according to the electric current of second source switch and the voltage control second step-down switch of the second bus, and according to the electric current of second source switch, the voltage of the second bus and the second step-down on off state, the second source switch disconnected is closed a floodgate.
After second source switch disconnects, then the second step-down switch that closes, turn apportion success side by side, closed a floodgate by the second source switch disconnected, realizing the second main transformer is load supplying.
Above-mentioned double-bus transformer station is by the control method turning fanout operation side by side, when double-bus transformer station meets the executive condition of switching command, control bus connection switch disconnects, when bus connection switch disconnects successfully, and when the first step-down on off state is in separating brake, the first main transformer is in maintenance, maintenance completes and needs to transfer the first step-down switch to combined floodgate, thus first mains switch of control connection on the first bus disconnects, and controls the first step-down switch and closes a floodgate, and the first mains switch disconnected is closed a floodgate.When bus connection switch disconnects successfully, and the second step-down on off state is when being in separating brake, second main transformer is in maintenance, maintenance completes and needs to transfer the second step-down switch to combined floodgate, thus the second source switch of control connection on the second bus disconnects, control the second step-down switch to close a floodgate, and the second source switch disconnected is closed a floodgate.By obtaining the state of each switch, only need according to switching command and the switching turning fanout operation according to each on off state side by side, without the need to turning the operation of apportion manually side by side, judgement is got involved without the need to operating personnel, recover bus fanout operation, shorten the operating time while guaranteeing handling safety, client's interruption duration is dropped to minimum as far as possible, meet the index request to safety and reliability.And adopt and first disconnect bus connection switch and to close again main transformer switch, in the transformer station that short circuit current exceeds standard, switch effectively can be avoided to break down the situation of blast, ensure that power supply safety.
Wherein in an embodiment, the voltage that the voltage that the executive condition of switching command also comprises the first bus is greater than preset first threshold value and the second bus is greater than default Second Threshold.
When double-bus transformer station meets the executive condition of switching command, the step S200 controlling bus connection switch disconnection is specially:
When bus connection switch state be in "on" position, the voltage of the first bus be greater than preset first threshold value and the voltage of the second bus is greater than default Second Threshold time, control bus connection switch disconnect.
Because on off state exists pseudo-state, namely switch is actual is in separating brake, but when obtaining on off state, the state information obtained is for closing a floodgate, in order to reduce error, further confirmation bus connection switch is in "on" position, then increase voltage swing to judge, namely increase and judge whether the voltage of the first bus is greater than preset first threshold value and whether the voltage of the second bus is greater than default Second Threshold, during due to paired running, first bus and the second bus need to be connected energising by bus connection switch, bus connection switch closes a floodgate, represent that the first bus and the second bus all have voltage, if bus connection switch is separating brake, the maintenance of one of them main transformer is not powered, so one of them bus do not have voltage, thus, only have when bus connection switch state is in "on" position, the voltage of the first bus be greater than preset first threshold value and the voltage of the second bus is greater than default Second Threshold time, represent that bus connection switch is actual to close.
In actual applications, by the primary winding of voltage transformer is connected with bus, export the secondary side voltage after busbar voltage no-load voltage ratio by the secondary coil of voltage transformer, by voltage acquisition module, this voltage is gathered, thus the voltage of bus can be obtained.Such as, as shown in Figure 1, be connected to the voltage transformer pt 1 on the first bus, its secondary coil exports the secondary voltage after the first busbar voltage no-load voltage ratio, is gathered this voltage by voltage acquisition module, can obtain the voltage of the first bus, be connected to the voltage transformer pt 2 on the second bus, its secondary coil exports the secondary voltage after the second busbar voltage no-load voltage ratio, is gathered this voltage by voltage acquisition module, can obtain the voltage of the second bus.By the primary winding of current transformer is connected with the low-pressure side of switch, the primary winding of the electric current inflow current instrument transformer of the low-pressure side of switch, secondary side switches electric current after the secondary coil generation switching current no-load voltage ratio of current transformer, by current acquisition module, this voltage is gathered, thus can switching current be obtained.Such as, Current Transmit 1 is connected to the low-pressure side of the first step-down switch, its secondary coil produces the secondary side current after the first step-down switching current no-load voltage ratio, thus the first step-down switching current can be obtained, Current Transmit 2 is connected to the low-pressure side of the second step-down switch, its secondary coil produces the secondary side current after the second step-down switching current no-load voltage ratio, thus can obtain the second step-down switching current.Current Transmit 11 to CT1n is connected to the low-pressure side of the first corresponding mains switch, the electric current of each first mains switch can be obtained, Current Transmit 21 to CT2n is connected to the low-pressure side of corresponding second source switch, can obtain the electric current of each second source switch.
Wherein in an embodiment, when described bus connection switch disconnects successfully, and when described first step-down on off state is in separating brake, also comprise before the step S300 that first mains switch of control connection on the first bus disconnects:
Judge whether bus connection switch state is in separating brake, and whether the electric current of bus connection switch is less than default mother current threshold.
When described bus connection switch state is in separating brake, and when the electric current of described bus connection switch is less than default mother current threshold, bus connection switch disconnects successfully, otherwise bus connection switch disconnects unsuccessfully, and prompting bus connection switch disconnects failure information.
When double-bus transformer station meets the executive condition of switching command, when controlling bus connection switch disconnection, have an impact cause bus connection switch really not disconnect in order to avoid extraneous factor disconnects process to bus connection switch, need to confirm whether bus connection switch disconnects successfully further, namely by judging whether bus connection switch state is in separating brake, and whether the electric current of bus connection switch is less than default mother current threshold, only have when this both meets, represent that mother disconnects successfully, carry out next step process, otherwise, mother disconnects unsuccessfully, prompting bus connection switch disconnects failure information, stop this to switch.
Refer to Fig. 3, wherein in an embodiment, close a floodgate according to the electric current of the first mains switch and the voltage control first step-down switch of the first bus, and according to the electric current of the first mains switch, the voltage of the first bus and the first step-down on off state, the step S400 that the first mains switch disconnected closes a floodgate comprised:
S410: when the electric current of the first mains switch is less than default first source current threshold value and the voltage of the first bus is less than preset first threshold value, controls the first step-down switch and closes a floodgate.
S420: when the voltage that the first step-down on off state is in combined floodgate, the electric current of the first step-down switch is greater than default first current threshold and the first bus is greater than preset first threshold value, closes a floodgate the first mains switch disconnected.
After the first mains switch disconnects, control the first step-down switch again to close a floodgate, but, first mains switch may really not disconnect, thus need whether to disconnect the first mains switch successfully to judge, namely judge whether the electric current of the first mains switch is less than default first source current threshold value and whether the voltage of the first bus is less than preset first threshold value, when both all meet, represent that the first mains switch disconnects successfully, namely the first bus has had a power failure, second main transformer no longer to the first bussed supply, then carries out control first step-down switch combined floodgate.
Only have and to carry out next step process successfully again when the first step-down switch closes a floodgate, whether successful in order to confirm that the first step-down switch closes a floodgate further, need to judge whether the first step-down on off state is in combined floodgate, whether the voltage whether electric current of the first step-down switch is greater than default first current threshold and the first bus is greater than preset first threshold value, when all meeting, representing closes a floodgate successfully, first bus restores electricity, supply power mode handover success, first bus and the second bus fanout operation, can be for further processing, the first mains switch being about to disconnect closes a floodgate, for load is powered.
Please continue to refer to Fig. 3, wherein in an embodiment, close a floodgate according to the electric current of second source switch and the voltage control second step-down switch of the second bus, and according to the electric current of second source switch, the voltage of the second bus and the second step-down on off state, the step S600 that the second source switch of disconnection closes a floodgate comprised:
S610: when the electric current of second source switch is less than default second source current threshold and the voltage of the second bus is less than default Second Threshold, controls the second step-down switch and closes a floodgate.
S620: when the voltage that the second step-down on off state is in combined floodgate, the electric current of the second step-down switch is greater than default second current threshold and the second bus is greater than default Second Threshold, closes a floodgate the second source switch disconnected.
After second source switch disconnects, control the second step-down switch again to close a floodgate, in order to avoid second source switch may really not disconnect the impact brought, thus need whether to disconnect second source switch successfully to judge, namely judge whether the electric current of second source switch is less than default second source current threshold and whether the voltage of the second bus is less than default Second Threshold, when both all meet, represent that second source switch disconnects successfully, namely the second bus has had a power failure, first main transformer no longer to the second bussed supply, then carries out control second step-down switch combined floodgate.
Only have and to carry out next step process successfully again when the second step-down switch closes a floodgate, whether successful in order to confirm that the second step-down switch closes a floodgate further, need to judge whether the voltage that whether the second step-down on off state is in combined floodgate, whether the electric current of the second step-down switch is greater than default second current threshold and the second bus is greater than default Second Threshold, when all meeting, representing closes a floodgate successfully, second bus restores electricity, supply power mode handover success, first bus and the second bus fanout operation, can be for further processing, the second source switch being about to disconnect closes a floodgate.
Above-mentioned preset first threshold value, default Second Threshold, default mother current threshold, default first source current threshold value, default first current threshold, default second source current threshold and default second current threshold preset according to transformer station's actual conditions.
Refer to Fig. 4, the present invention also provides a kind of double-bus transformer station by the control system turning fanout operation side by side, comprising:
Acquisition module 100, turn the switching command of apportion and the on off state of double-bus transformer station side by side for obtaining user, wherein, on off state comprises bus connection switch state, the first step-down on off state and the second step-down on off state.
When the first main transformer overhauls, need the second main transformer to power to the first bus, when the second main transformer overhauls, need the first main transformer to power to the second bus.When main transformer has overhauled, need to be transformed into original main transformer to carry out apportion and power, operating personnel are at the background computer interface operation of man-machine interaction, click bus by turning fanout operation key side by side, the switching command that user turns apportion side by side can be produced, obtain this switching command, and obtain the on off state of double-bus transformer station.
First control module 200, for when double-bus transformer station meets the executive condition of switching command, control bus connection switch and disconnect, wherein, the executive condition of switching command comprises bus connection switch state and is in "on" position.
When bus connection switch state is in "on" position, represents the executive condition tentatively meeting switching command, can subsequent treatment be carried out, namely control bus connection switch and disconnect, thus the first bus and the second bus are disconnected, make double-bus fanout operation.
Second control module 300, for disconnecting successfully when bus connection switch, and when the first step-down on off state is in separating brake, first mains switch of control connection on the first bus disconnects.
But, when controlling bus connection switch and disconnecting, due to the impact of external condition, may cause disconnecting unsuccessfully, only have when bus connection switch disconnects successfully, just carry out subsequent treatment, namely when disconnecting successfully, the state judging which switch in the first step-down switch and the second step-down switch is again in separating brake, namely judge which switch has carried out overhauling and need transhipment row, such as, first step-down on off state is separating brake, represent that the first step-down switch overhauls, need to be transported row, the first mains switch of the first bus on control first step-down switch is then needed first to disconnect.
3rd control module 400, for closing a floodgate according to the electric current of the first mains switch and the voltage control first step-down switch of the first bus, and according to the electric current of the first mains switch, the voltage of the first bus and the first step-down on off state, the first mains switch disconnected is closed a floodgate.
After the first mains switch disconnects, then the first step-down switch that closes, turn apportion success side by side, closed a floodgate by the first mains switch disconnected, realizing the first main transformer is load supplying.
4th control module 500, for disconnecting successfully when bus connection switch, and when the second step-down on off state is in separating brake, the second source switch of control connection on the second bus disconnects.
The state judging which switch in the first step-down switch and the second step-down switch is in separating brake, namely judge which switch has carried out overhauling and need transhipment row, when the second step-down on off state is separating brake, represent that the second step-down switch overhauls, need to be transported row, then need the second source switch of the second bus on control second step-down switch first to disconnect.
5th control module 600, for closing a floodgate according to the electric current of second source switch and the voltage control second step-down switch of the second bus, and according to the electric current of second source switch, the voltage of the second bus and the second step-down on off state, the second source switch disconnected is closed a floodgate.
After second source switch disconnects, then the second step-down switch that closes, turn apportion success side by side, closed a floodgate by the second source switch disconnected, realizing the second main transformer is load supplying.
Above-mentioned double-bus transformer station is by the control system turning fanout operation side by side, when double-bus transformer station meets the executive condition of switching command, control bus connection switch disconnects, when bus connection switch disconnects successfully, and when the first step-down on off state is in separating brake, the first main transformer is in maintenance, maintenance completes and needs to transfer the first step-down switch to combined floodgate, thus first mains switch of control connection on the first bus disconnects, and controls the first step-down switch and closes a floodgate, and the first mains switch disconnected is closed a floodgate.When bus connection switch disconnects successfully, and the second step-down on off state is when being in separating brake, second main transformer is in maintenance, maintenance completes and needs to transfer the second step-down switch to combined floodgate, thus the second source switch of control connection on the second bus disconnects, control the second step-down switch to close a floodgate, and the second source switch disconnected is closed a floodgate.By obtaining the state of each switch, only need according to switching command and the switching turning fanout operation according to each on off state side by side, without the need to turning the operation of apportion manually side by side, judgement is got involved without the need to operating personnel, recover bus fanout operation, shorten the operating time while guaranteeing handling safety, client's interruption duration is dropped to minimum as far as possible, meet the index request to safety and reliability.And adopt and first disconnect bus connection switch and to close again main transformer switch, in the transformer station that short circuit current exceeds standard, switch effectively can be avoided to break down the situation of blast, ensure that power supply safety.
Wherein in an embodiment, the voltage that the voltage that the executive condition of switching command also comprises the first bus is greater than preset first threshold value and the second bus is greater than default Second Threshold.
First control module 200 specifically for being in "on" position when bus connection switch state, the voltage of the first bus be greater than preset first threshold value and the voltage of the second bus is greater than default Second Threshold time, control bus connection switch disconnect.
Because on off state exists pseudo-state, namely switch is actual is in separating brake, but when obtaining on off state, the state information obtained is for closing a floodgate, in order to reduce error, further confirmation bus connection switch is in "on" position, then increase voltage swing to judge, namely increase and judge whether the voltage of the first bus is greater than preset first threshold value and whether the voltage of the second bus is greater than default Second Threshold, during due to paired running, first bus and the second bus need to be connected energising by bus connection switch, bus connection switch closes a floodgate, represent that the first bus and the second bus all have voltage, if bus connection switch is separating brake, the maintenance of one of them main transformer is not powered, so one of them bus do not have voltage, thus, only have when bus connection switch state is in "on" position, the voltage of the first bus be greater than preset first threshold value and the voltage of the second bus is greater than default Second Threshold time, represent that bus connection switch is actual to close.
In actual applications, by the primary winding of voltage transformer is connected with bus, export the secondary side voltage after busbar voltage no-load voltage ratio by the secondary coil of voltage transformer, thus the voltage of bus can be obtained, the voltage of the first bus and the second bus can be obtained.By the primary winding of current transformer is connected with the low-pressure side of switch, the primary winding of the electric current inflow current instrument transformer of the low-pressure side of switch, secondary side switches electric current after the secondary coil generation switching current no-load voltage ratio of current transformer, thus can switching current be obtained, the electric current of the first step-down switch, the second step-down switch, the first mains switch and second source switch can be obtained.
Wherein in an embodiment, above-mentioned double-bus transformer station is also comprised by the control system turning fanout operation side by side:
Judge module, for judging whether bus connection switch state is in separating brake, and whether the electric current of bus connection switch is less than default mother current threshold, when described bus connection switch state is in separating brake, and the electric current of described bus connection switch is when being less than default mother current threshold, bus connection switch disconnects successfully, otherwise, bus connection switch disconnects unsuccessfully, and prompting bus connection switch disconnects failure information.
When double-bus transformer station meets the executive condition of switching command, when controlling bus connection switch disconnection, have an impact cause bus connection switch really not disconnect in order to avoid extraneous factor disconnects process to bus connection switch, need to confirm whether bus connection switch disconnects successfully further, namely by judging whether bus connection switch state is in separating brake, and whether the electric current of bus connection switch is less than default mother current threshold, only have when this both meets, represent that mother disconnects successfully, carry out next step process, otherwise, mother disconnects unsuccessfully, prompting bus connection switch disconnects failure information, stop this to switch.
Refer to Fig. 5, wherein in an embodiment, the 3rd control module 400 comprises:
First control unit 410, for be less than default first source current threshold value when the electric current of the first mains switch and the voltage of the first bus is less than preset first threshold value time, control first step-down switch close a floodgate.
Second control unit 420, when being greater than preset first threshold value for the voltage being in combined floodgate when the first step-down on off state, the electric current of the first step-down switch is greater than default first current threshold and the first bus, closes a floodgate the first mains switch disconnected.
After the first mains switch disconnects, control the first step-down switch again to close a floodgate, but, first mains switch may really not disconnect, thus need whether to disconnect the first mains switch successfully to judge, namely judge whether the electric current of the first mains switch is less than default first source current threshold value and whether the voltage of the first bus is less than preset first threshold value, when both all meet, represent that the first mains switch disconnects successfully, then carry out control first step-down switch combined floodgate.
Only have and to carry out next step process successfully again when the first step-down switch closes a floodgate, whether successful in order to confirm that the first step-down switch closes a floodgate further, need to judge whether the voltage that whether the first step-down on off state is in combined floodgate, whether the electric current of the first step-down switch is greater than default first current threshold and the first bus is greater than preset first threshold value, when all meeting, representing closes a floodgate successfully, be for further processing, the first mains switch being about to disconnect closes a floodgate.
Please continue to refer to Fig. 5, wherein in an embodiment, the 5th control module 600 comprises:
3rd control unit 610, for be less than default second source current threshold when the electric current of second source switch and the voltage of the second bus is less than default Second Threshold time, control second step-down switch close a floodgate.
4th control unit 620, when being greater than default Second Threshold for the voltage being in combined floodgate when the second step-down on off state, the electric current of the second step-down switch is greater than default second current threshold and the second bus, closes a floodgate the second source switch disconnected.
After second source switch disconnects, control the second step-down switch again to close a floodgate, in order to avoid second source switch may really not disconnect the impact brought, thus need whether to disconnect second source switch successfully to judge, namely judge whether the electric current of second source switch is less than default second source current threshold and whether the voltage of the second bus is less than default Second Threshold, when both all meet, represent that second source switch disconnects successfully, then carry out control second step-down switch combined floodgate.
Only have and to carry out next step process successfully again when the second step-down switch closes a floodgate, whether successful in order to confirm that the second step-down switch closes a floodgate further, need to judge whether the voltage that whether the second step-down on off state is in combined floodgate, whether the electric current of the second step-down switch is greater than default second current threshold and the second bus is greater than default Second Threshold, when all meeting, representing closes a floodgate successfully, be for further processing, the second source switch being about to disconnect closes a floodgate.
Above-mentioned preset first threshold value, default Second Threshold, default mother current threshold, default first source current threshold value, default first current threshold, default second source current threshold and default second current threshold preset according to transformer station's actual conditions.
Each technical characteristic of above embodiment can combine arbitrarily, for making description succinct, all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
Above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. double-bus transformer station is by the control method turning fanout operation side by side, it is characterized in that, comprises the following steps:
Obtain and turn the switching command of apportion and the on off state of double-bus transformer station side by side, wherein, described on off state comprises bus connection switch state, the first step-down on off state and the second step-down on off state;
When described double-bus transformer station meets the executive condition of described switching command, control described bus connection switch and disconnect, wherein, the executive condition of described switching command comprises described bus connection switch state and is in "on" position;
When described bus connection switch disconnects successfully, and when described first step-down on off state is in separating brake, first mains switch of control connection on the first bus disconnects;
According to the electric current of described first mains switch and the voltage control of described first bus, the first step-down switch closes a floodgate, and is closed a floodgate by described first mains switch disconnected according to the electric current of described first mains switch, the voltage of described first bus and described first step-down on off state;
When described bus connection switch disconnects successfully, and when described second step-down on off state is in separating brake, the second source switch of control connection on the second bus disconnects;
According to the electric current of described second source switch and the voltage control of described second bus, the second step-down switch closes a floodgate, and is closed a floodgate by the described second source switch disconnected according to the electric current of described second source switch, the voltage of described second bus and described second step-down on off state.
2. double-bus transformer station according to claim 1 is by the control method turning fanout operation side by side, it is characterized in that, the voltage that the voltage that the executive condition of described switching command also comprises described first bus is greater than preset first threshold value and described second bus is greater than default Second Threshold.
3. double-bus transformer station according to claim 1 is by the control method turning fanout operation side by side, it is characterized in that, describedly disconnect successfully when described bus connection switch, and described first step-down on off state is when being in separating brake, also comprise before the step that first mains switch of control connection on the first bus disconnects:
Judge whether described bus connection switch state is in separating brake, and whether the electric current of described bus connection switch is less than default mother current threshold;
When described bus connection switch state is in separating brake, and when the electric current of described bus connection switch is less than default mother current threshold, described bus connection switch disconnects successfully, otherwise described bus connection switch disconnects unsuccessfully, and prompting bus connection switch disconnects failure information.
4. double-bus transformer station according to claim 1 is by the control method turning fanout operation side by side, it is characterized in that, described in the voltage control of the described electric current according to described first mains switch and described first bus, the first step-down switch closes a floodgate, and the step that described first mains switch disconnected closes a floodgate is comprised according to the electric current of described first mains switch, the voltage of described first bus and described first step-down on off state:
When the electric current of described first mains switch is less than default first source current threshold value and the voltage of described first bus is less than preset first threshold value, controls described first step-down switch and close a floodgate;
When the voltage that described first step-down on off state is in combined floodgate, the electric current of described first step-down switch is greater than described default first current threshold and described first bus is greater than described preset first threshold value, described first mains switch disconnected is closed a floodgate.
5. double-bus transformer station according to claim 1 is by the control method turning fanout operation side by side, it is characterized in that, described in the voltage control of the described electric current according to described second source switch and described second bus, the second step-down switch closes a floodgate, and the step that the described second source switch disconnected closes a floodgate is comprised according to the electric current of described second source switch, the voltage of described second bus and described second step-down on off state:
When the electric current of described second source switch is less than default second source current threshold and the voltage of described second bus is less than default Second Threshold, controls described second step-down switch and close a floodgate;
When the voltage that described second step-down on off state is in combined floodgate, the electric current of described second step-down switch is greater than described default second current threshold and described second bus is greater than described default Second Threshold, the described second source switch disconnected is closed a floodgate.
6. double-bus transformer station is by the control system turning fanout operation side by side, it is characterized in that, comprising:
Acquisition module, for obtaining the on off state of switching command and the double-bus transformer station turning apportion side by side, wherein, described on off state comprises bus connection switch state, the first step-down on off state and the second step-down on off state;
First control module, for when described double-bus transformer station meets the executive condition of described switching command, control described bus connection switch and disconnect, wherein, the executive condition of described switching command comprises described bus connection switch state and is in "on" position;
Second control module, for disconnecting successfully when described bus connection switch, and when described first step-down on off state is in separating brake, first mains switch of control connection on the first bus disconnects;
3rd control module, close a floodgate for the first step-down switch according to the electric current of described first mains switch and the voltage control of described first bus, and according to the electric current of described first mains switch, the voltage of described first bus and described first step-down on off state, described first mains switch disconnected is closed a floodgate;
4th control module, for disconnecting successfully when described bus connection switch, and when described second step-down on off state is in separating brake, the second source switch of control connection on the second bus disconnects;
5th control module, close a floodgate for the second step-down switch according to the electric current of described second source switch and the voltage control of described second bus, and according to the electric current of described second source switch, the voltage of described second bus and described second step-down on off state, the described second source switch disconnected is closed a floodgate.
7. double-bus transformer station according to claim 6 is by the control system turning fanout operation side by side, it is characterized in that, the voltage that the voltage that the executive condition of described switching command also comprises described first bus is greater than preset first threshold value and described second bus is greater than default Second Threshold.
8. double-bus transformer station according to claim 6 is by the control system turning fanout operation side by side, it is characterized in that, also comprises:
Judge module, for judging whether described bus connection switch state is in separating brake, and whether the electric current of described bus connection switch is less than default mother current threshold;
When described bus connection switch state is in separating brake, and when the electric current of described bus connection switch is less than default mother current threshold, described bus connection switch disconnects successfully, otherwise described bus connection switch disconnects unsuccessfully, and prompting bus connection switch disconnects failure information.
9. double-bus transformer station according to claim 6 is by the control system turning fanout operation side by side, it is characterized in that, described 3rd control module comprises:
First control unit, for be less than default first source current threshold value when the electric current of described first mains switch and the voltage of described first bus is less than preset first threshold value time, control described first step-down switch close a floodgate;
Second control unit, for being in combined floodgate when described first step-down on off state, the electric current of described first step-down switch is greater than the described voltage presetting the first current threshold and described first bus when being greater than described preset first threshold value, closed a floodgate by described first mains switch disconnected.
10. double-bus transformer station according to claim 6 is by the control system turning fanout operation side by side, it is characterized in that, described 5th control module comprises:
3rd control unit, for when the electric current of described second source switch is less than default second source current threshold and the voltage of described second bus is less than default Second Threshold, controls described second step-down switch and closes a floodgate;
4th control unit, for being in combined floodgate when described second step-down on off state, the electric current of described second step-down switch is greater than the described voltage presetting the second current threshold and described second bus when being greater than described default Second Threshold, closed a floodgate by the described second source switch disconnected.
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| CN201510947192.1A CN105552884B (en) | 2015-12-16 | 2015-12-16 | Double-bus transformer station by turning the control method and system of fanout operation side by side |
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| CN109412256A (en) * | 2018-11-23 | 2019-03-01 | 中煤鄂尔多斯能源化工有限公司 | A kind of in-put of spare power supply method and device |
| CN114123497A (en) * | 2021-11-13 | 2022-03-01 | 国网新疆电力有限公司阿勒泰供电公司 | Intelligent bus-tie monitoring device of low-voltage direct-current power supply system for station and control method |
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| US20090212631A1 (en) * | 2008-02-22 | 2009-08-27 | Liebert Corporation | Substation based high voltage uninterruptible power supply |
| CN103457350A (en) * | 2013-09-04 | 2013-12-18 | 国家电网公司 | Automatic throw-in equipment of emergency power supply |
| CN104485732A (en) * | 2014-12-17 | 2015-04-01 | 广州供电局有限公司 | In-put control method for standby powers of transformer substations |
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| US20090212631A1 (en) * | 2008-02-22 | 2009-08-27 | Liebert Corporation | Substation based high voltage uninterruptible power supply |
| CN103457350A (en) * | 2013-09-04 | 2013-12-18 | 国家电网公司 | Automatic throw-in equipment of emergency power supply |
| CN104485732A (en) * | 2014-12-17 | 2015-04-01 | 广州供电局有限公司 | In-put control method for standby powers of transformer substations |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109412256A (en) * | 2018-11-23 | 2019-03-01 | 中煤鄂尔多斯能源化工有限公司 | A kind of in-put of spare power supply method and device |
| CN109412256B (en) * | 2018-11-23 | 2022-08-12 | 中煤鄂尔多斯能源化工有限公司 | Standby power supply switching method and device |
| CN114123497A (en) * | 2021-11-13 | 2022-03-01 | 国网新疆电力有限公司阿勒泰供电公司 | Intelligent bus-tie monitoring device of low-voltage direct-current power supply system for station and control method |
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| CN105552884B (en) | 2018-01-16 |
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