CN215733656U - Primary and secondary integration high-voltage charge control switching-on and switching-off control circuit - Google Patents
Primary and secondary integration high-voltage charge control switching-on and switching-off control circuit Download PDFInfo
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- CN215733656U CN215733656U CN202120698584.XU CN202120698584U CN215733656U CN 215733656 U CN215733656 U CN 215733656U CN 202120698584 U CN202120698584 U CN 202120698584U CN 215733656 U CN215733656 U CN 215733656U
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Abstract
The utility model relates to a primary and secondary integration high-voltage charge control switching-on and switching-off control circuit which comprises a load control circuit, an automatic switching-on control circuit, a manual switching-on control circuit, a arrearage switching-off control circuit, a manual switching-off control circuit and a delay trigger circuit, wherein the circuits are connected in parallel and are connected with the output end of a power transformer or the output end of a standby power supply through a change-over switch. The circuit solves the problem that the existing charge control system can be directly switched on again by manually pressing a switch-on button after arrearage brake opening 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 utility model 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 circuit.
Background
At present, the problems of remote meter reading, remote control of electric power charging and the like of an electric power department are solved by commonly using an electricity selling management system or a prepayment system and the like, 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 utility model 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, the utility model provides a primary and secondary integrated high-voltage charge control switching-on and switching-off control circuit, which comprises:
the load control loop comprises a switching-on and switching-off unit control switch of a load control terminal, a switching-off relay coil and a time relay coil, wherein a normally open contact of the switching-on and switching-off unit control switch is connected with the switching-off relay coil, and a normally closed contact of the switching-on and switching-off unit control switch is connected with the time relay coil; the load control terminal is in communication connection with a remote main station, and after the load control terminal receives a brake opening instruction of the remote main station, the load control terminal switching-on and switching-off unit generates periodic brake opening pulses; the time delay time of the time relay is longer than the period of the periodic switching-off pulse;
the automatic switching-on control loop is connected with the load control loop in parallel and comprises a remote/local selector switch, a normally open contact of a time relay, a normally closed contact of a switching-off relay, a normally closed contact of a manual switching-off button, a normally open delay contact of the time relay and a switching-on coil of the vacuum circuit breaker on the column, wherein the remote switch of the remote/local selector switch is sequentially connected with the contact of the time relay, the normally closed contact of the switching-off relay, the normally closed contact of the manual switching-off button, the normally open delay contact of the time relay and the switching-on coil of the vacuum circuit breaker on the column in series;
the on-site switch of the remote/on-site change-over switch is sequentially connected with the manual closing button normally open switch, the manual opening button normally closed contact, the time relay normally open time delay contact and the on-column vacuum circuit breaker closing coil in series;
the arrearage brake separating control loop is connected with the load control loop in parallel and comprises a1 st normally open contact of the brake separating relay and a brake separating coil of the on-column vacuum circuit breaker, and the 1 st normally open contact of the brake separating relay is connected with the brake separating coil of the on-column vacuum circuit breaker in series;
the manual brake-separating control circuit is connected with the load control circuit in parallel and comprises a1 st normally open contact of a manual brake-separating button and a brake-separating coil of the on-column vacuum circuit breaker, and the 1 st normally open contact of the manual brake-separating button is connected with the brake-separating coil of the on-column vacuum circuit breaker in series;
the time delay trigger circuit comprises a time relay zero clearing reset unit switch, a separating brake relay No. 2 normally open contact and a manual separating brake button No. 2 normally open contact, wherein the time relay zero clearing reset unit switch, the separating brake relay No. 2 normally open contact and the manual separating brake button No. 2 normally open contact are connected in parallel.
Preferably, the load control circuit, the automatic switching-on control circuit, the manual switching-on control circuit, the arrearage switching-off control circuit and the manual switching-off control circuit 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, this first secondary fuses high pressure expense accuse divide-shut brake control circuit still includes local remote control combined floodgate control circuit, local remote control combined floodgate control circuit includes distant place/local change over switch, remote control combined floodgate control switch, manual separating brake button normally closed contact, time relay normally open time delay contact, post vacuum circuit breaker combined floodgate coil, and the local switch of distant place/local change over switch is connected with remote control combined floodgate control switch, manual separating brake button normally closed contact, time relay normally open time delay contact, post vacuum circuit breaker combined floodgate coil series connection in proper order, local remote control combined floodgate control circuit with load control circuit connects in parallel.
Preferably, the primary and secondary integration high-voltage charge control switching-on and switching-off control circuit further comprises a local remote control switching-off control loop, the local remote control switching-off control loop comprises a remote control switching-off control switch and a column vacuum circuit breaker switching-off coil, the remote control switching-off control switch is connected with the column vacuum circuit breaker switching-off coil in series, and the local remote control switching-off control loop is connected with the load control loop in parallel.
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 column 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.
The beneficial effects produced by the control circuit are explained as follows: when remote brake-separating control is carried out, even if a brake-closing signal misoperation is issued at the local position, because the time relay normally-open time delay contact is connected in series with the brake-closing control circuit, the time relay normally-open time delay contact is in time delay, the normally-open time delay contact is always kept in an off state, the brake-closing control circuit is not connected, the vacuum circuit breaker is not connected with a brake-closing coil, and a high-voltage line is kept in a brake-separating state, so that the brake-closing 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 load control loop, the automatic switching-on control loop, the manual 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 circuit diagram of a primary and secondary integrated high-voltage cost control switching-on and switching-off control circuit.
Fig. 2 is a time relay delay trigger circuit diagram.
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.
As shown in fig. 1 and 2, a primary and secondary integrated high-voltage cost control switching-on and switching-off control circuit has the following structure:
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 sequentially connected 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 series, 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 to respectively form a manual closing control loop and a local remote control closing control loop.
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 a power supply PWR2 through a 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.
And a closing state switch and an opening state switch in the vacuum circuit breaker on the column are respectively connected with a closing indicator lamp HR and an opening indicator lamp HG.
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 disconnected, the coil 1KA1 of the opening relay 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 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 a 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 the 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 utility model 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 the modifications and variations assumed above should be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a high pressure expense accuse divide-shut brake control circuit is fused to a secondary, its characterized in that includes:
the load control loop comprises a switching-on and switching-off unit control switch of a load control terminal, a switching-off relay coil and a time relay coil, wherein a normally open contact of the switching-on and switching-off unit control switch is connected with the switching-off relay coil, and a normally closed contact of the switching-on and switching-off unit control switch is connected with the time relay coil; the load control terminal is in communication connection with a remote main station, and after the load control terminal receives a brake opening instruction of the remote main station, the load control terminal switching-on and switching-off unit generates periodic brake opening pulses; the time delay time of the time relay is longer than the period of the periodic switching-off pulse;
the automatic switching-on control loop is connected with the load control loop in parallel and comprises a remote/local selector switch, a normally open contact of a time relay, a normally closed contact of a switching-off relay, a normally closed contact of a manual switching-off button, a normally open delay contact of the time relay and a switching-on coil of the vacuum circuit breaker on the column, wherein the remote switch of the remote/local selector switch is sequentially connected with the contact of the time relay, the normally closed contact of the switching-off relay, the normally closed contact of the manual switching-off button, the normally open delay contact of the time relay and the switching-on coil of the vacuum circuit breaker on the column in series;
the on-site switch of the remote/on-site change-over switch is sequentially connected with the manual closing button normally open switch, the manual opening button normally closed contact, the time relay normally open time delay contact and the on-column vacuum circuit breaker closing coil in series;
the arrearage brake separating control loop is connected with the load control loop in parallel and comprises a1 st normally open contact of the brake separating relay and a brake separating coil of the on-column vacuum circuit breaker, and the 1 st normally open contact of the brake separating relay is connected with the brake separating coil of the on-column vacuum circuit breaker in series;
the manual brake-separating control circuit is connected with the load control circuit in parallel and comprises a1 st normally open contact of a manual brake-separating button and a brake-separating coil of the on-column vacuum circuit breaker, and the 1 st normally open contact of the manual brake-separating button is connected with the brake-separating coil of the on-column vacuum circuit breaker in series;
the time delay trigger circuit comprises a time relay zero clearing reset unit switch, a separating brake relay No. 2 normally open contact and a manual separating brake button No. 2 normally open contact, wherein the time relay zero clearing reset unit switch, the separating brake relay No. 2 normally open contact and the manual separating brake button No. 2 normally open contact are connected in parallel.
2. The primary and secondary fused high-voltage charge control switch-on and switch-off control circuit according to claim 1, characterized in that: the load control loop, the automatic switching-on control loop, the manual 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 fused high-voltage cost-controlled switching-on and switching-off control circuit according to claim 1 or claim 2, wherein: still include remote control combined floodgate control circuit on spot, remote control combined floodgate control circuit on spot includes distant place/on-the-spot change over switch, remote control combined floodgate control switch, manual separating brake button normally closed contact, time relay normally open time delay contact, post vacuum circuit breaker combined floodgate coil, distant place/on-the-spot change over switch's on-the-spot switch in proper order with remote control combined floodgate control switch, manual separating brake button normally closed contact, time relay normally open time delay contact, post vacuum circuit breaker combined floodgate coil series connection, remote control combined floodgate control circuit on spot with the load control circuit is parallelly connected.
4. The primary-secondary fusion high-voltage cost-control switching-on and switching-off control circuit according to claim 1 or claim 2, characterized in that: the remote control device is characterized by further comprising an on-site remote control brake-separating control loop, wherein the on-site remote control brake-separating control loop comprises a remote control brake-separating control switch and an on-column vacuum circuit breaker brake-separating coil, the remote control brake-separating control switch is connected with the on-column vacuum circuit breaker brake-separating coil in series, and the on-site remote control brake-separating control loop is connected with the load control loop in parallel.
5. The primary and secondary fused high-voltage cost-controlled switching on and off control circuit according to claims 1 to 4, wherein: the time relay is an electronic time relay.
6. The primary and secondary fused high-voltage charge control switch-on and switch-off control circuit 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 fused high-voltage cost-controlled switching on and off control circuit according to claims 1 to 6, wherein: the column vacuum circuit breaker is ZKW32 type column vacuum circuit breaker or ZW-32 type column vacuum circuit breaker.
8. The primary and secondary fused high voltage cost controlled switching on and off control circuit according to claims 1 to 7, wherein: 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120698584.XU CN215733656U (en) | 2021-04-07 | 2021-04-07 | Primary and secondary integration high-voltage charge control switching-on and switching-off control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120698584.XU CN215733656U (en) | 2021-04-07 | 2021-04-07 | Primary and secondary integration high-voltage charge control switching-on and switching-off control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN215733656U true CN215733656U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120698584.XU Active CN215733656U (en) | 2021-04-07 | 2021-04-07 | Primary and secondary integration high-voltage charge control switching-on and switching-off control circuit |
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| Country | Link |
|---|---|
| CN (1) | CN215733656U (en) |
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2021
- 2021-04-07 CN CN202120698584.XU patent/CN215733656U/en active Active
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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. |