CN113160491B - Primary and secondary integration high-voltage charge control switching-on and switching-off control method - Google Patents
Primary and secondary integration high-voltage charge control switching-on and switching-off control method Download PDFInfo
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- CN113160491B CN113160491B CN202110370680.6A CN202110370680A CN113160491B CN 113160491 B CN113160491 B CN 113160491B CN 202110370680 A CN202110370680 A CN 202110370680A CN 113160491 B CN113160491 B CN 113160491B
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F15/00—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity
- G07F15/06—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity with means for prepaying basic charges, e.g. rent for meters
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
The invention relates to a primary and secondary integration high-voltage charge control switching-on and switching-off control method, which comprises the following steps: connecting a normally closed contact of a switch of a switching-on and switching-off unit switch of the load control terminal with a time relay coil, and connecting a normally open contact with a switching-off relay coil; setting the delay time of a time relay of a control box, wherein the delay time is greater than the period of a switching-off pulse signal of a switching-on and switching-off unit of a load control terminal; the time relay delay contact is connected in series to a closing control loop; setting the control mode to be a local mode or a remote mode; if the control mode is a remote mode, executing a remote opening control process or a remote closing control process; and if the control mode is the local mode, executing a local switching-off control process or a local switching-on control process. The method solves the problems that the existing cost control system can be directly switched on again by manually pressing a switch-on button after arrearage switch-off in the actual operation process, and misoperation is easily caused; after the main bus has a power failure, the maintenance needs to manually pull the pull rod to switch on and off, and the problem of potential safety hazard exists.
Description
Technical Field
The invention relates to the field of electrical control, in particular to a primary and secondary integrated high-voltage charge control switching-on and switching-off control method.
Background
At present, electricity selling management systems or prepayment systems and the like are generally used for solving the problems of remote meter reading, remote control of electricity charging and the like of an electric power department, and the systems integrate the functions of electric energy metering, remote communication, prepayment and electricity larceny prevention into a whole. The ZKW32 type integrated high-voltage prepayment system operated in the power grid is suitable for large, medium and small box type high-supply and high-count power users with the alternating current rated frequency of 50Hz, the rated voltage of 10kV and the rated current of 1250A, namely the capacity of 1600kVA or below. According to the system, the vacuum circuit breaker on the terminal control column is switched on and off to realize the charge control switching-on and switching-off function, and in the scheme, due to the fact that in the actual operation process, the switch can be directly switched on again by manually pressing the switch-on button after the charge is owed and the switch is opened, misoperation is easily caused. In addition, after the main bus is powered off, the pull rod needs to be manually pulled to open and close the brake during maintenance, and the operation difficulty and potential safety hazard on site are increased.
Disclosure of Invention
The invention aims to solve the technical problem that the existing primary and secondary integrated high-voltage cost control system is easy to generate misoperation in the remote/local control switching process. In order to solve the technical problem of the invention, the technical scheme is as follows:
connecting a normally closed contact of a switch of a switching-on and switching-off unit switch of the load control terminal with a time relay coil, and connecting a normally open contact with a switching-off relay coil;
setting time delay time of a time relay, wherein the time delay time is greater than the period of a switching-off pulse signal of a switching-on and switching-off unit of a load control terminal; connecting the time delay contact of the time relay in series into a closing control loop;
setting the control mode to be a local mode or a remote mode;
if the control mode is a remote mode, executing a remote opening control process or a remote closing control process;
the remote brake-separating control process comprises the following steps:
the remote master station confirms that the vacuum circuit breaker is in a closing state by adopting the states of the set relay and the branch relay through the load management terminal;
the remote master station receives the electric energy metering data sent by the load management terminal, judges whether the electric energy metering data is arreared or not, and sends a brake separating instruction to the load management terminal if the electric energy metering data is arreared;
the load management terminal receives a brake opening instruction sent by a distant master station, and a brake opening and closing unit of the load management terminal generates periodic brake opening pulses;
the coil of the opening relay is electrified on the upper edge of the opening pulse, the 1 st normally open contact of the opening relay is attracted, the arrearage opening control loop is connected, the opening coil of the vacuum circuit breaker is connected, and the opening of the high-voltage line is realized; meanwhile, the opening pulse enables the normally open contact of the opening relay 2 to be closed and then opened, an opening signal after closing is generated, and the time relay is triggered to start the delay counting;
the coil of the time relay is electrified at the lower edge of the opening pulse, the normally open time delay contact of the time relay is in a time delay state, the time delay time is longer than the period of the opening pulse, the normally open time delay contact keeps the normally open state, and the automatic closing control loop is disconnected;
a switching-on coil of the vacuum circuit breaker is not switched on, and the switching-off state of a high-voltage line is kept;
the remote main station confirms the opening state of the high-voltage line by adopting the states of the set relay and the open relay through the load control terminal, and simultaneously extinguishes a closing indicator lamp and lights the opening indicator lamp to indicate that the high-voltage line is in the opening state;
the remote closing control process comprises the following steps:
the remote master station confirms that the vacuum circuit breaker is in an opening state by adopting the states of the set relay and the opening relay through the load management terminal;
the remote master station receives the electric energy metering data sent by the load management terminal, judges whether the charge is owed or not, and issues a closing instruction if the charge is not owed; the load management terminal receives a switching-on command sent by the main station, and the switching-on and switching-off unit stops generating periodic switching-off pulses;
the 1 st normally open contact of the opening relay keeps a normally open state, an arrearage opening control loop is disconnected, an opening coil of the vacuum circuit breaker is not connected, and opening action is not executed;
the No. 2 normally-open contact of the coil of the opening relay keeps a normally-open state, a closed disconnection signal is not generated, and the time relay is not triggered to start and delay counting;
the coil of the time relay is electrified on the lower edge of a tripping pulse, a normally open time delay contact of the time relay is sucked by the coil of the time relay after delaying the preset time delay from the latest 1 time of time delay triggering moment, an automatic switching-on control loop is switched on, a switching-on coil of the vacuum circuit breaker is switched on, and the switching-on of a high-voltage line is realized;
the remote main station confirms the closing state of the high-voltage line by adopting the states of the set relay and the set relay through the load control terminal, and simultaneously extinguishes the opening indicator lamp and lights the closing indicator lamp to indicate that the high-voltage line is in the closing state;
if the control mode is the local mode, executing a local brake opening control process or a local brake closing control process;
the local brake-separating control process comprises the following steps:
confirming that the vacuum circuit breaker is in a closing state according to a closing indicator;
pressing a brake separating button, switching on a manual brake separating control loop, switching on a brake separating coil of the vacuum circuit breaker, and realizing the brake separation of a high-voltage line;
extinguishing the switching-on indicator lamp and lightening the switching-off indicator lamp to indicate that the high-voltage line is in a switching-off state;
the local switching-on control flow is as follows:
confirming that the vacuum circuit breaker is in a switching-off state according to the switching-off indicating lamp;
the opening button is released after being pressed down, a disconnection signal is generated after the opening button is closed, and a time relay is triggered to start delay counting; after the time relay delays the preset time, the normally open time delay contact of the time relay is closed, at the moment, a closing button is pressed down, a manual closing control loop is connected, a closing coil of the vacuum circuit breaker is connected, and closing of a high-voltage line is realized;
and extinguishing the switching-off indicator lamp and lightening the switching-on indicator lamp to indicate that the high-voltage line is in a switching-on state.
Preferably, the closing control loop, the arrearage opening control loop and the manual opening control loop are connected with the output end of the power transformer or the output end of the standby power supply through a change-over switch.
Preferably, the setting method of the control mode is as follows: the remote/local change-over switch is connected in series to a closing control loop, the switch is connected with an automatic closing loop when the remote mode is selected, and the switch is connected with a manual closing loop when the local mode is selected.
Preferably, the local closing control process further includes a local remote control closing control process: and connecting a remote control closing control switch into the closing control loop in parallel, and remotely and manually closing the switch through a wireless remote controller.
Preferably, the local opening control process further includes a local remote control opening control process: and the remote control brake-separating control switch is connected in parallel to the manual brake-separating control loop, and the remote control brake-separating is remotely and manually controlled through a wireless remote controller.
Preferably, the time relay is an electronic time relay.
Preferably, the power-on delay range of the electronic time relay is adjustable within 0-10 hours, the electronic time relay is provided with a zero clearing reset signal, and the delay precision is 0.1 second.
Preferably, the vacuum circuit breaker is an ZKW32 type column vacuum circuit breaker or a ZW _32 type column vacuum circuit breaker.
Preferably, the period of the periodic opening pulse generated by the load management terminal opening and closing unit is 60 seconds, and the pulse upper edge width is 300 milliseconds.
Preferably, the remote master station and the load control terminal establish communication connection through 4G communication.
The beneficial effects produced by the control method are explained as follows: according to the remote switching-off process, switching-off control is carried out, even if a switching-on signal misoperation is issued at a local position, because the time relay normally-open time delay contact is connected in series with the switching-on control loop, the time relay normally-open time delay contact is in time delay, the normally-open time delay contact is always kept in a disconnected state, the switching-on control loop is not connected, the vacuum circuit breaker switching-on coil is not connected, and the high-voltage line is kept in a switching-off state, so that the switching-on misoperation is avoided. When the vacuum circuit breaker is in a closing state, the remote master station adopts the states of the set relay and the off relay through the load management terminal to confirm that the vacuum circuit breaker is in the closing state, so that the misoperation of remotely releasing the opening is avoided.
In the power failure maintenance process, after the vacuum circuit breaker is opened, if a remote/local change-over switch is mistakenly switched to a local position, a superior switch is suddenly electrified to issue a closing command, the vacuum circuit breaker is still in a delayed closing stage after the opening, and meanwhile, a reset signal unit of the time relay receives a closed disconnection signal, so that a normally open delayed contact of the time relay keeps a normally open state, a closing control loop is not switched on, a closing coil of the vacuum circuit breaker is not switched on, a high-voltage line keeps the opening state, potential safety hazards in maintenance cannot be influenced, and closing misoperation is prevented.
The switching-on control loop, the arrearage switching-off control loop and the manual switching-off control loop are connected with the output end of the power transformer or the output end of the standby power supply through the change-over switch. When the power supply mutual inductor is in a power failure condition, the switching switch converts the switching-on control loop, the arrearage switching-off control loop and the manual switching-off control loop into a standby power supply for supplying power, so that the control circuit is ensured not to be in a power failure state.
When the local power transmission closing operation is carried out, a remote control closing button is pressed down at a certain distance from the high-voltage line by using a remote controller, the closing is remotely and manually controlled by a wireless remote controller, and the closing of the high-voltage line is completed under the condition of protecting the personal safety of an operator. When the local brake-separating operation is carried out, a remote controller is used for pressing a remote-control brake-separating button at a certain distance from the high-voltage line, and the wireless remote controller is used for remotely and manually controlling the brake-separating, so that the brake-separating of the high-voltage line is completed under the condition of protecting the personal safety of an operator.
Drawings
Fig. 1 is a main flow chart of a primary and secondary integration high-voltage cost control switching-on and switching-off control method.
FIG. 2 is a flow chart of remote opening control.
Fig. 3 is a flow chart of remote closing control.
FIG. 4 is a flow chart of the local opening control.
Fig. 5 is a flow chart of local closing control.
Fig. 6 is a circuit diagram of a primary and secondary integrated high-voltage charge-controlled switching-on and switching-off control circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
The first embodiment is as follows:
a primary and secondary integration high-voltage charge control switching-on and switching-off control method is characterized in that a main control flow is shown in figure 1:
step S1: a normally closed contact of a switch of a switching-on and switching-off unit switch of the load control terminal is connected with a time relay coil, and a normally open contact is connected with a switching-off relay coil;
step S2: setting time delay time of a time relay, wherein the time delay time is greater than the period of a switching-off pulse signal of a switching-on and switching-off unit of a load control terminal, the time relay is an electronic time relay, the power-on time delay range of the time relay is adjustable within 0-10 hours, a reset signal is reset, and the time delay precision is 0.1 second;
step S3: connecting the time delay contact of the time relay in series into a closing control loop;
step S4: setting a control mode to be a local mode or a remote mode, wherein the setting method of the control mode comprises the following steps: connecting a remote/local change-over switch into a closing control loop in series, connecting the switch with an automatic closing loop when a remote mode is selected, and connecting the switch with a manual closing loop when a local mode is selected;
step S5: if the control mode is a remote mode, executing a remote opening control process or a remote closing control process;
step S6: and if the control mode is the local mode, executing a local opening control process or a local closing control process.
Wherein, the remote opening control process is shown in fig. 2:
step S511: the remote main station adopts the states of a set relay and a split relay through the load management terminal to confirm that the vacuum circuit breaker is in a closing state, the vacuum circuit breaker is an ZKW32 type column vacuum circuit breaker or a ZW-32 type column vacuum circuit breaker, and the remote main station is in communication connection with the load control terminal through 4G communication;
step S512: the remote master station receives the electric energy metering data sent by the load management terminal, judges whether the electric energy metering data is arreared or not, and sends a brake separating instruction to the load management terminal if the electric energy metering data is arreared;
step S513: the load management terminal receives a switching-off instruction sent by a distant master station, and a switching-off and switching-on unit of the load management terminal generates a periodic switching-off pulse, wherein the period of the periodic switching-off pulse is 60 seconds, and the width of the upper edge of the pulse is 300 milliseconds;
step S514: the coil of the opening relay is electrified on the upper edge of the opening pulse, the 1 st normally open contact of the opening relay is attracted, the arrearage opening control loop is connected, the opening coil of the vacuum circuit breaker is connected, and the opening of the high-voltage line is realized; meanwhile, the opening pulse enables the normally open contact of the opening relay 2 to be closed and then opened, an opening signal after closing is generated, and the time relay is triggered to start the delay counting;
step S515: the coil of the time relay is electrified at the lower edge of the opening pulse, the normally open time delay contact of the time relay is in a time delay state, the time delay time is longer than the period of the opening pulse, the normally open time delay contact keeps the normally open state, and the automatic closing control loop is disconnected; step S516: a switching-on coil of the vacuum circuit breaker is not switched on, and the switching-off state of a high-voltage line is kept;
step S517: and the remote main station adopts the states of the set relay and the open relay through the load control terminal to confirm the open state of the high-voltage line, and simultaneously turns off the closing indicator lamp and turns on the open indicator lamp to indicate that the high-voltage line is in the open state.
The remote closing control flow is shown in fig. 3:
step S521: the remote main station adopts the states of a set relay and a separate relay through the load management terminal to confirm that the vacuum circuit breaker is in a brake-separating state, the vacuum circuit breaker is an ZKW32 type column vacuum circuit breaker or a ZW-32 type column vacuum circuit breaker, and the remote main station is in communication connection with the load control terminal through 4G communication;
step S522: the remote master station receives the electric energy metering data sent by the load management terminal, judges whether the charge is owed or not, and issues a closing instruction if the charge is not owed;
step S523: the load management terminal receives a switching-on command sent by the main station, and the switching-on and switching-off unit stops generating periodic switching-off pulses; step S524: the 1 st normally open contact of the opening relay keeps a normally open state, an arrearage opening control loop is disconnected, an opening coil of the vacuum circuit breaker is not connected, and opening action is not executed;
step S525: the 2 nd normally open contact of the coil of the opening relay keeps a normally open state, a closed disconnection signal is not generated, and a time relay is not triggered to start the time delay counting;
step S526: the coil of the time relay is electrified at the lower edge of a tripping pulse, a normally open time delay contact of the time relay is attracted by the coil of the time relay after delaying the preset time delay time from the latest 1 time of time delay triggering moment, an automatic switching-on control loop is switched on, a switching-on coil of the vacuum circuit breaker is switched on, and the switching-on of a high-voltage line is realized;
step S527: and the remote main station confirms the closing state of the high-voltage line by adopting the states of the set relay and the open relay through the load control terminal, and simultaneously extinguishes the open indicator and lights the closing indicator to indicate that the high-voltage line is in the closing state.
The local opening control flow is shown in figure 4:
step S611: confirming that the vacuum circuit breaker on the column is in a closing state according to a closing indicator lamp;
step S612: pressing a brake separating button, switching on a manual brake separating control loop, switching on a brake separating coil of the vacuum circuit breaker, and realizing the brake separation of a high-voltage line;
step S613: extinguishing the switching-on indicator lamp and lightening the switching-off indicator lamp to indicate that the high-voltage line is in a switching-off state;
the local closing control flow is shown in fig. 5:
step S621: confirming that the vacuum circuit breaker on the column is in a switching-off state according to the switching-off indicating lamp;
step S622: after the opening button is pressed down, the opening button is loosened, a closed opening signal is generated, and a time relay is triggered to start delay counting;
step S622: after the time relay delays the preset time, the normally open time delay contact of the time relay is closed, at the moment, a closing button is pressed down, a manual closing control loop is connected, a closing coil of the vacuum circuit breaker is connected, and closing of a high-voltage line is realized;
and extinguishing the switching-off indicator lamp and lightening the switching-on indicator lamp to indicate that the high-voltage line is in a switching-on state.
In the control flow, the closing control loop, the arrearage opening control loop and the manual opening control loop are connected with the output end of the power transformer or the output end of the standby power supply through the change-over switch.
In the above control flow, the local closing control flow further includes a local remote control closing control flow: and connecting a remote control closing control switch into the closing control loop in parallel, and remotely and manually closing the switch through a wireless remote controller. The local brake-separating control process further comprises a local remote control brake-separating control process: and the remote control brake-separating control switch is connected in parallel to the manual brake-separating control loop, and the remote control brake-separating is remotely and manually controlled through a wireless remote controller.
The second embodiment:
a circuit for performing switching on/off control according to a primary and secondary integration high-voltage charge control switching on/off control method is shown in FIG. 6:
the normally open contact of the switching unit control switch FK1 of the load control terminal FK is connected to the opening relay coil 1KA1 and to the power supply PWR2 through the power supply changeover switch 2 QA. The normally closed contact of the switching unit control switch FK1 of the load control terminal FK is connected to the time relay coil KT1 and to the power supply PWR2 through the power supply changeover switch 2 QA.
The remote switch of the remote/local switch SA is connected in series with a contact KT4 of the time relay, a normally closed contact 1KA3 of the opening relay, a normally closed contact SBS1 of the manual opening button, a normally open delay contact KT2 of the time relay and a closing coil of the vacuum circuit breaker on the column in sequence, and is connected with a power supply PWR2 through a power supply switch 2QA to form an automatic closing control loop. After the manual closing button normally open switch SBC is connected with the remote control closing control switch FTK2 in parallel, the manual closing button normally open switch SBC is connected with a local switch of the remote/local change-over switch SA, a manual opening button normally closed contact SBS1, a time relay normally open time delay contact KT2 and a column vacuum circuit breaker closing coil in series, and the manual closing button normally open switch SBC, the manual opening button normally closed contact SBS1, the time relay normally open time delay contact KT2 and the column vacuum circuit breaker closing coil are connected with a power supply PWR2 through a power supply change-over switch 2QA, and a manual closing control loop and a local remote control closing control loop are formed respectively.
After being connected in parallel, the manual brake-separating button normally-open contact SBS2, the brake-separating relay normally-open contact 1KA2 and the remote control brake-separating control switch FTK3 are connected in series with the brake-separating coil of the vacuum circuit breaker on the column and are connected with the power supply PWR2 through the power supply changeover switch 2QA, and a manual brake-separating control loop, an arrearage brake-separating control loop and a local remote control brake-separating control loop are respectively formed.
The time relay zero clearing reset unit switch is connected with the opening relay contact 1KA4 and the manual opening button contact SBS3 in parallel, receives an opening signal after the opening relay contact 1KA4 or the manual opening button contact SBS3 is closed, and starts time relay delay counting.
The working flow of the circuit is as follows: and closing a remote switch of the remote/local change-over switch SA to enter a remote control mode. After the load control terminal receives an arrearage brake separating instruction issued by a distant main station through 4G communication, the switch-on/off unit generates a periodic brake separating pulse, the period of the periodic brake separating pulse is 60 seconds, and the width of the upper edge of the pulse is 300 milliseconds. On the upper edge of the periodic opening pulse, the normally open contact of the on-off unit switch FK1 is closed, so that the opening relay coil 1KA1 is electrified, the normally open contact 1KA2 of the opening relay is attracted, the arrearage opening control loop is connected, the opening coil of the on-column vacuum circuit breaker is connected, and the opening of a high-voltage line is realized. Meanwhile, as the normally closed contact 1KA3 of the opening relay is disconnected, the normally open time delay contact KT2 of the time relay is also in a disconnected state, the automatic closing control loop is not connected, the closing coil of the vacuum circuit breaker on the column is not connected, and the vacuum circuit breaker on the column is not closed. At the lower edge of the periodic opening pulse, the normally open contact of the on-off unit switch FK1 is opened, the opening relay coil 1KA1 is powered off, and the normally closed contact 1KA3 of the opening relay is closed; meanwhile, the normally closed contact of the switching unit switch FK1 is closed, so that the time relay coil KT1 is electrified, and the time relay contact KT4 is attracted. And the normally open contact 1KA4 of the opening relay generates a closed opening signal to trigger a time relay zero clearing reset switch KT3 connected in parallel with the opening signal, so that the time relay starts time delay counting. Because the preset delay time is longer than the period of the periodic switching-off pulse, when the upper edge of the next switching-off pulse arrives, the time relay is still in a delay state, and the normally-open delay contact KT2 keeps a disconnected state until the delay time is over, so that the automatic switching-on control loop is not switched on, the switching-on coil of the vacuum circuit breaker on the column is not switched on, and the vacuum circuit breaker on the column is not switched on. Therefore, as long as the load control terminal switching-on and switching-off unit generates periodic switching-off pulses all the time, the normally open time delay contact of the time relay keeps in an off state all the time, the automatic switching-on control loop is not connected all the time, the on-column vacuum circuit breaker switching-on coil is not connected all the time, the on-column vacuum circuit breaker is not switched on all the time, and the high-voltage line keeps in a switching-off state all the time.
When a load control terminal receives a closing instruction sent by a remote main station through 4G communication, a switching-on and switching-off unit stops generating periodic switching-off pulses, a normally open contact of a switching-on and switching-off unit switch FK1 is disconnected, a coil 1KA1 of a switching-off relay is powered off, a normally closed contact 1KA3 of the switching-off relay is closed, a normally open contact 1KA2 of the switching-off relay is disconnected, an arrearage switching-off control loop is disconnected, a switching-off coil of a vacuum circuit breaker is not connected, and switching-off action is not executed; meanwhile, the normally closed contact of the switching unit switch FK1 is closed, so that the time relay coil KT1 is electrified, and the time relay contact KT4 is attracted. And the normally open contact 1KA4 of the opening relay stops generating a closed back off signal, and does not trigger the time relay zero clearing reset switch KT3 connected in parallel with the opening relay, so that the time relay stops time delay counting after the last time delay counting is finished, the normally open delay contact KT2 is closed after the last time delay time is finished, an automatic closing control loop is switched on, a closing coil of the vacuum circuit breaker on the column is switched on, the vacuum circuit breaker on the column is closed, and the high-voltage line realizes automatic closing.
And closing a local switch of the remote/local change-over switch SA to enter a local control mode. Confirming that the vacuum circuit breaker on the column is in a closing state according to a closing indicator lamp; when the manual brake-separating button is pressed down, the contact SBS2 is closed, the manual brake-separating control loop is switched on, the vacuum circuit breaker brake-separating coil is switched on, and the high-voltage line brake-separating is realized.
Confirming that the vacuum circuit breaker on the column is in a switching-off state according to the switching-off indicating lamp; a normally closed contact of the switching-on and switching-off unit switch FK1 is closed, so that a time relay coil KT1 is electrified; after the opening button is pressed down, the opening button is released, a manual opening button contact SBS3 which is connected with the time relay zero clearing reset switch KT3 in parallel generates an opening signal after closing, and the time relay is triggered to start time delay counting. After the time relay delays for a preset time, the normally open time delay contact KT2 of the time relay is closed. At the moment, a manual closing button SBC is pressed, a manual closing control loop is connected, a closing coil of the vacuum circuit breaker is connected, and closing of a high-voltage line is achieved.
In the local control mode, a remote controller is used for controlling a remote control closing control switch FTK2 to be closed, a local remote control closing control loop is connected, a closing coil of the vacuum circuit breaker is connected, and closing of a high-voltage line is achieved. And a remote controller is used for controlling the closing of a remote control brake control switch FTK3, a local remote control brake-separating control loop is connected, a vacuum circuit breaker brake-separating coil is connected, and the high-voltage line brake-separating is realized.
The embodiment of the invention can carry out sequence adjustment, combination and deletion according to actual needs.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and those modifications and variations assumed in the above are also considered to be within the scope of the present invention.
Claims (9)
1. A primary and secondary integration high-voltage charge control switching-on and switching-off control method is characterized by comprising the following steps:
connecting a normally closed contact of a switching-on and switching-off unit switch of a load control terminal with a time relay coil, connecting a normally open contact with a switching-off relay coil, and respectively connecting a time relay zero clearing reset switch with a normally open contact of a switching-off relay and a manual switching-off button contact in parallel;
setting time delay time of a time relay, wherein the time delay time is greater than the period of a switching-off pulse signal of a switching-on and switching-off unit of a load control terminal;
connecting the time delay contact of the time relay in series into a closing control loop;
setting the control mode to be a local mode or a remote mode;
if the control mode is a remote mode, executing a remote opening control process or a remote closing control process;
if the control mode is the local mode, executing a local brake opening control process or a local brake closing control process;
the remote brake-separating control process comprises the following steps:
the remote master station confirms that the vacuum circuit breaker is in a closing state by adopting the states of the set relay and the branch relay through the load management terminal;
the remote master station receives the electric energy metering data sent by the load management terminal, judges whether the electric energy metering data is arreared or not, and sends a brake separating instruction to the load management terminal if the electric energy metering data is arreared;
the load management terminal receives a brake opening instruction sent by a remote main station, and a brake opening and closing unit of the load management terminal generates periodic brake opening pulses;
the coil of the opening relay is electrified on the upper edge of the opening pulse, the 1 st normally open contact of the opening relay is attracted, the arrearage opening control loop is connected, the opening coil of the vacuum circuit breaker is connected, and the opening of the high-voltage line is realized; meanwhile, the opening pulse enables the normally open contact of the opening relay 2 to be closed and then opened, an opening signal after closing is generated, and the time relay is triggered to start the delay counting;
the coil of the time relay is electrified at the lower edge of the opening pulse, the normally open time delay contact of the time relay is in a time delay state, the time delay time is longer than the period of the opening pulse, the normally open time delay contact keeps the normally open state, and the automatic closing control loop is disconnected;
a switching-on coil of the vacuum circuit breaker is not switched on, and the switching-off state of a high-voltage line is kept;
the remote main station confirms the switching-off state of the high-voltage line by adopting the states of the set relay and the switching-off relay through the load control terminal, and simultaneously turns off the switching-on indicator lamp and turns on the switching-off indicator lamp to indicate that the high-voltage line is in the switching-off state;
the remote closing control process comprises the following steps:
the remote master station confirms that the vacuum circuit breaker is in an opening state by adopting the states of the set relay and the opening relay through the load management terminal;
the remote master station receives the electric energy metering data sent by the load management terminal, judges whether the charge is owed or not, and issues a closing instruction if the charge is not owed;
the load management terminal receives a switching-on command sent by the main station, and the switching-on and switching-off unit stops generating periodic switching-off pulses;
the 1 st normally open contact of the opening relay keeps a normally open state, an arrearage opening control loop is disconnected, an opening coil of the vacuum circuit breaker is not connected, and opening action is not executed;
the No. 2 normally-open contact of the coil of the opening relay keeps a normally-open state, a closed disconnection signal is not generated, and the time relay is not triggered to start and delay counting;
the coil of the time relay is electrified at the lower edge of a tripping pulse, a normally open time delay contact of the time relay is attracted by the coil of the time relay after delaying the preset time delay time from the latest 1 time of time delay triggering moment, an automatic switching-on control loop is switched on, a switching-on coil of the vacuum circuit breaker is switched on, and the switching-on of a high-voltage line is realized;
the remote main station confirms the closing state of the high-voltage line by adopting the states of the set relay and the set relay through the load control terminal, and simultaneously extinguishes the opening indicator lamp and lights the closing indicator lamp to indicate that the high-voltage line is in the closing state;
the local brake-separating control process comprises the following steps:
confirming that the vacuum circuit breaker is in a closing state according to a closing indicator;
pressing a brake separating button, switching on a manual brake separating control loop, switching on a brake separating coil of the vacuum circuit breaker, and realizing the brake separation of a high-voltage line;
extinguishing the switching-on indicator lamp and lightening the switching-off indicator lamp to indicate that the high-voltage line is in a switching-off state;
the local closing control process comprises the following steps:
confirming that the vacuum circuit breaker is in a switching-off state according to the switching-off indicating lamp;
the opening button is released after being pressed down, a disconnection signal is generated after the opening button is closed, and a time relay is triggered to start delay counting;
after the time relay delays the preset time, the normally open time delay contact of the time relay is closed, at the moment, a closing button is pressed down, a manual closing control loop is connected, a closing coil of the vacuum circuit breaker is connected, and closing of a high-voltage line is realized;
and extinguishing the switching-off indicator lamp and lightening the switching-on indicator lamp to indicate that the high-voltage line is in a switching-on state.
2. The primary and secondary fusion high-voltage charge control switching-on and switching-off control method according to claim 1, characterized in that: the switching-on control loop, the arrearage switching-off control loop and the manual switching-off control loop are connected with the output end of the power transformer or the output end of the standby power supply through a change-over switch.
3. The primary and secondary fusion high-voltage charge control switching-on and switching-off control method according to claim 1, characterized in that: the setting method of the control mode comprises the following steps: the remote/local change-over switch is connected in series to a closing control loop, the switch is connected with an automatic closing loop when the remote mode is selected, and the switch is connected with a manual closing loop when the local mode is selected.
4. The primary and secondary fusion high-voltage charge control switching-on and switching-off control method according to claim 1, characterized in that: the local closing control process also comprises a local remote control closing control process: a remote control switch-on control switch is connected in parallel to the switch-on control loop, and remote control switch-on is carried out remotely and manually through a wireless remote controller; the local brake-separating control process further comprises a local remote control brake-separating control process: and the remote control brake-separating control switch is connected in parallel to the manual brake-separating control loop, and the remote control brake-separating is remotely and manually controlled through a wireless remote controller.
5. The primary and secondary fusion high-voltage charge control switching-on and switching-off control method according to claim 1, characterized in that: the time relay is an electronic time relay.
6. The primary and secondary fusion high-voltage charge control switch-on and switch-off control method according to claim 5, characterized in that: the power-on delay range of the electronic time relay is adjustable within 0-10 hours, the electronic time relay is provided with a reset signal, and the delay precision is 0.1 second.
7. The primary and secondary fusion high-voltage charge control switching-on and switching-off control method according to any one of claims 1 to 6, characterized in that: the vacuum circuit breaker is an ZKW32 type column vacuum circuit breaker or a ZW _32 type column vacuum circuit breaker.
8. The primary and secondary fusion high-voltage charge control switching-on and switching-off control method according to any one of claims 1 to 6, characterized in that: the period of the periodic opening pulse generated by the opening and closing unit of the load management terminal is 60 seconds, and the width of the upper edge of the pulse is 300 milliseconds.
9. The primary and secondary fusion high-voltage charge control switching-on and switching-off control method according to any one of claims 1 to 6, characterized in that: and the distant master station and the load control terminal establish communication connection through 4G communication.
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| CN115021244B (en) * | 2022-06-10 | 2024-04-26 | 国网辽宁省电力有限公司锦州供电公司 | Control device and method for preventing user power supply switch from being frequently opened and closed during starting |
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Address after: 411201 28 Bai Shi Road, Jing Kai District, Xiangtan, Hunan Patentee after: Weisheng Energy Technology Co.,Ltd. Address before: 411201 28 Bai Shi Road, Jing Kai District, Xiangtan, Hunan Patentee before: WASION ELECTRIC Co.,Ltd. |