CN116053075A - Control method for split-phase magnetic control switch switching operation - Google Patents
Control method for split-phase magnetic control switch switching operation Download PDFInfo
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- CN116053075A CN116053075A CN202310118359.8A CN202310118359A CN116053075A CN 116053075 A CN116053075 A CN 116053075A CN 202310118359 A CN202310118359 A CN 202310118359A CN 116053075 A CN116053075 A CN 116053075A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/38—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H33/593—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for ensuring operation of the switch at a predetermined point of the ac cycle
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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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
A control method for split-phase magnetic control switch switching operation aims at the defect that switching operation of a feeder switch is three-phase simultaneous tripping and closing, and when the switching operation is the switching operation, the three-phase voltage is different and zero, so that the switching contact of the feeder switch discharges and arcing conditions exist, the switching contact loss of the feeder switch is caused, and the service life of the switching contact is shortened. The invention can realize the three-phase zero crossing switching of the feeder switch through the control method of the split-phase magnetic control switch switching operation, avoid the arcing condition of the switch contact, avoid the switch contact loss of the feeder switch and prolong the service life of the switch contact of the feeder switch.
Description
Technical Field
The invention belongs to the technical field of magnetic control switch control in pole switches in the power distribution and utilization industry, and particularly relates to a control method for split-phase magnetic control switch split-on and split-off operation, which can realize three-phase independent action and three-phase simultaneous action of a magnetic control switch.
Background
The feeder switch (disconnect) is characterized in that when the feeder switch (disconnect) is in a split position, an insulation distance and an obvious disconnection mark which meet the specified requirements are arranged between contacts; in the closed position, the switching device is capable of carrying both current under normal loop conditions and current under abnormal conditions (e.g., short circuit) for a prescribed period of time. The feeder switch (commonly called as a knife switch) generally refers to a high-voltage feeder switch, namely a feeder switch with rated voltage of 1kv or more, is generally called as a feeder switch for short, is the most used electric appliance in high-voltage switch electric appliances, has a simpler working principle and structure, but has high requirements on working reliability due to large use amount, and has larger influence on design, establishment and safe operation of power substations and power plants.
At present, a feeder terminal device is arranged on an electric pole and is arranged on a monitoring device beside a feeder switch. And the remote control of functions such as electric quantity remote measurement, working condition remote signaling, on-pole operation switch, battery, reset and the like of the power grid is completed. For the feeder switch, the switching operation is three-phase simultaneous tripping and closing, and when the switching is on or off, the three-phase voltage is not zero, so that the arcing condition of the switch contact is caused, the loss of the switch contact is caused, and the service life of the switch contact is shortened.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a control method for switching operation of a split-phase magnetic control switch, which aims at the defects that switching operation of a feeder switch is three-phase simultaneous tripping and closing, and the switching operation is that the three-phase voltage is different and zero, so that the switching contact of the feeder switch is in discharge arc-pulling condition, the switching contact loss of the feeder switch is caused, and the service life of the switching contact is shortened. The invention can realize the three-phase zero crossing switching of the feeder switch through the control method of the split-phase magnetic control switch switching operation, avoid the arcing condition of the switch contact, avoid the switch contact loss of the feeder switch and prolong the service life of the switch contact of the feeder switch.
The invention adopts the following technical scheme.
A control method for split-phase magnetic control switch switching operation includes:
the feeder switch control circuit is connected with the feeder switch mechanism and consists of a mixed full-bridge circuit consisting of three left half-bridges and a public right half-bridge;
the mixed full-bridge circuit realizes the opening and closing of three phases of the feeder switching mechanism at zero crossing points respectively.
Preferably, the three left half-bridge circuits correspond to three phases of an A phase, a B phase and a C phase of the feeder switch mechanism respectively, and form an A phase half-bridge circuit, a B phase half-bridge circuit and a C phase half-bridge circuit.
Preferably, the phase A half-bridge circuit, the phase B half-bridge circuit and the phase C half-bridge circuit are all independent half-bridge circuits, and the independent half-bridge circuits are formed by connecting an upper bridge arm and a lower bridge arm in series; the upper bridge arm and the lower bridge arm are directly connected in series by a controllable switching device, and the controllable switching device is connected with a unidirectional diode in parallel; the output ends of the three independent half-bridge circuits are respectively connected with the positive ends of the three single-phase electromagnetic actuating mechanisms, and the three single-phase electromagnetic actuating mechanisms form a feeder switch mechanism.
Preferably, the single-phase electromagnetic actuator is an electrically controlled circuit breaker.
Preferably, the specific structures of the a-phase half-bridge circuit, the B-phase half-bridge circuit and the C-phase half-bridge circuit include:
the switching tube I Q1 and the switching tube II Q2 serving as controllable switching devices are connected in series to form an A-phase half-bridge circuit, the switching tube III Q3 and the switching tube IV Q4 serving as the controllable switching devices are connected in series to form a B-phase half-bridge circuit, and the switching tube five Q5 and the switching tube six Q6 serving as the controllable switching devices are connected in series to form a C-phase half-bridge circuit;
diode one D1, diode two D2, diode three D3, diode four D4, diode five D5 and diode six D6 which are unidirectional diodes are respectively connected with the drain electrode and the source electrode of the switch tube one Q1, the drain electrode and the source electrode of the switch tube two Q2, the drain electrode and the source electrode of the switch tube three Q3, the drain electrode and the source electrode of the switch tube four Q4, the drain electrode and the source electrode of the switch tube five Q5 and the drain electrode and the source electrode of the switch tube six Q6 in parallel;
the grid electrode of the switching tube I Q1 is connected with an A-phase upper tube control signal, the grid electrode of the switching tube II Q2 is connected with an A-phase lower tube control signal, the grid electrode of the switching tube III Q3 is connected with a B-phase upper tube control signal, the grid electrode of the switching tube IV Q4 is connected with a B-phase lower tube control signal, the grid electrode of the switching tube V Q5 is connected with a C-phase upper tube control signal, and the grid electrode of the switching tube V Q6 is connected with a C-phase lower tube control signal;
the connection part of the source electrode of the switching tube I Q1 and the drain electrode of the switching tube II Q2 serving as the output end of the independent half-bridge circuit is connected to the positive end of the A-phase electromagnetic actuating mechanism serving as the single-phase electromagnetic actuating mechanism, the connection part of the source electrode of the switching tube III Q3 and the drain electrode of the switching tube IV Q4 serving as the output end of the independent half-bridge circuit is connected to the positive end of the B-phase electromagnetic actuating mechanism serving as the single-phase electromagnetic actuating mechanism, and the connection part of the source electrode of the switching tube V Q5 serving as the output end of the independent half-bridge circuit and the drain electrode of the switching tube VI Q6 is connected to the positive end of the C-phase electromagnetic actuating mechanism serving as the single-phase electromagnetic actuating mechanism.
Preferably, the public right half bridge is formed by connecting an integral upper bridge arm and a lower bridge arm in series, wherein the upper bridge arm and the lower bridge arm are directly connected in series by a controllable switching device, and the controllable switching device is connected with a unidirectional diode in parallel; the output end of the public right half-bridge is connected in parallel with the negative ends of the three single-phase electromagnetic actuating mechanisms.
Preferably, the specific structure of the common right half-bridge includes:
the source electrode of the switching tube seven Q7 serving as the output end of the public right half bridge and the drain electrode of the switching tube eight Q8 are connected to the negative end of the A-phase electromagnetic actuating mechanism, the negative end of the B-phase electromagnetic actuating mechanism and the negative end of the C-phase electromagnetic actuating mechanism; the diode seven D7 and the diode eight D8 are respectively connected in parallel with the drain and the source of the switching tube seven Q7 and the drain and the source of the switching tube eight Q8.
Preferably, the hybrid full-bridge circuit realizes that the upper bridge arm of the three left half-bridges is conducted through control signals and the lower bridge arm of the public right half-bridge is conducted through control signals when the three phases of the feeder switch mechanism, namely the A phase, the B phase and the C phase, of the feeder switch mechanism are required to act simultaneously during the opening and closing of the three phases of the feeder switch mechanism respectively; the positive current flows from the upper bridge arm of the three left half-bridges to the positive ends of the three single-phase electromagnetic actuating mechanisms, and then flows from the negative ends of the three single-phase electromagnetic actuating mechanisms into the negative electrode through the lower bridge arm of the public right half-bridge; the three single-phase electromagnetic actuating mechanisms start to act through current excitation at the same time, so that the feeder switching mechanism is pushed, and the action when the phases A, B and C of the feeder switching mechanism are identical is completed.
Preferably, when the feeder switch requires three phases of the a phase, the B phase and the C phase of the feeder switch mechanism to act simultaneously, the method specifically includes:
switching tubes Q1 and Q4 serving as upper bridge arms of the A-phase half-bridge circuit and six Q6 serving as lower bridge arms of the C-phase half-bridge circuit are respectively conducted through an A-phase upper tube control signal, a B-phase upper tube control signal and a C-phase upper tube control signal serving as control signals, and switching tubes Q2 and Q4 serving as lower bridge arms of the A-phase half-bridge circuit and six Q6 serving as lower bridge arms of the C-phase half-bridge circuit are respectively not conducted through an A-phase lower tube control signal and a B-phase lower tube control signal; the switch tube eight Q8 serving as a lower bridge arm of the public right half bridge is conducted through a control signal of a lower arm of the public right half bridge, and the switch tube seven Q7 serving as an upper bridge arm of the public right half bridge is not conducted through a control signal of an upper arm of the public right half bridge; the positive pole VH+ current is respectively supplied to the positive end of the A-phase electromagnetic actuating mechanism, the positive end of the B-phase electromagnetic actuating mechanism and the positive end of the C-phase electromagnetic actuating mechanism through a first Q1, a third Q3 and a fifth Q5 of the upper bridge arm of the three left half bridges, and then flows into the negative pole through a eighth Q8 of the switch tube of the public right half bridge through the negative end of the A-phase electromagnetic actuating mechanism, the negative end of the B-phase electromagnetic actuating mechanism and the negative end of the C-phase electromagnetic actuating mechanism; the three electromagnetic actuating mechanisms start to act through current excitation at the same time, so that the feeder switching mechanism is pushed, and the action of the feeder switching mechanism when the phase A, the phase B and the phase C are the same is completed.
Preferably, the hybrid full-bridge circuit realizes that three phases of the feeder switch mechanism are respectively turned on and off at zero crossing points, when the feeder switch needs to have time sequence actions on the three phases of A phase, B phase and C phase of the feeder switch mechanism, the upper bridge arms of the three left half-bridges are conducted according to time sequence requirements through time sequence control of control signals, and the lower bridge arms of the public right half-bridge are conducted through the control signals; the positive current flows to the positive end of the corresponding single-phase electromagnetic actuating mechanism through the upper bridge arm of the left half bridge which is opened according to the time sequence requirement, and then flows to the negative electrode through the lower bridge arm of the public right half bridge through the negative end of the corresponding single-phase electromagnetic actuating mechanism; the corresponding single-phase electromagnetic actuating mechanism starts to act through current excitation at the same time, so that the feeder switching mechanism is pushed, and the time sequence action of the three phases of A phase, B phase and C phase of the feeder switching mechanism is completed.
Preferably, when the feeder switch needs to act in time sequence by three phases of A phase, B phase and C phase of the feeder switch mechanism, switching tube one Q1 as an upper bridge arm of the A phase half-bridge circuit, switching tube three Q3 as an upper bridge arm of the B phase half-bridge circuit and switching tube five Q5 as an upper bridge arm of the C phase half-bridge circuit are respectively conducted with C phase upper tube control signals through A phase upper tube control signals and B phase upper tube control signals according to time sequence requirements, switching tube two Q2 as a lower bridge arm of the A phase half-bridge circuit, switching tube four Q4 as a lower bridge arm of the B phase half-bridge circuit and switching tube six Q6 as a lower bridge arm of the C phase half-bridge circuit are respectively not conducted with C phase lower tube control signals through A phase lower tube control signals and B phase lower tube control signals; the switch tube eight Q8 serving as a lower bridge arm of the public right half bridge is conducted through a control signal of the lower arm of the public right half bridge, and the switch tube seven Q7 serving as an upper bridge arm of the public right half bridge is not conducted through a control signal of the lower arm of the public right half bridge; the positive electrode VH+ current respectively reaches the positive end of the A-phase electromagnetic actuating mechanism, the positive end of the B-phase electromagnetic actuating mechanism and the positive end of the C-phase electromagnetic actuating mechanism through a first Q1 switch tube, a third Q3 switch tube and a fifth Q5 switch tube of the three left half-bridges according to the time sequence, and flows into the negative electrode through a eighth Q8 switch tube of the public right half-bridge through the negative end of the A-phase electromagnetic actuating mechanism, the negative end of the B-phase electromagnetic actuating mechanism and the negative end of the C-phase electromagnetic actuating mechanism; the three electromagnetic actuating mechanisms start to act through current excitation at the same time, so that the feeder switch mechanism is pushed, and three phases of A phase, B phase and C phase of the feeder switch mechanism are completed to act in time sequence.
Compared with the prior art, the three-phase feeder switch has the advantages that zero crossing action can be realized, and the service life of the switch is prolonged. The invention adopts the circuit structure of the public right half bridge, so that the circuit power elements are reduced, the miniaturization of the system is realized, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a diagram showing the overall principle of the control method of the split-phase magnetic control switch switching operation in the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely expressed with reference to the drawings in the embodiments of the present invention. The embodiments expressed in this application are merely examples of some, but not all, of the present invention. All other embodiments, which can be made by those skilled in the art without inventive faculty, are within the scope of the invention.
As shown in fig. 1, the method for the substation safety universal remote operation and maintenance intelligent recorder comprises the following steps:
the feeder switch control circuit is connected with the feeder switch mechanism and consists of a mixed full-bridge circuit consisting of three left half-bridges and a public right half-bridge;
the mixed full-bridge circuit realizes the opening and closing of three phases of the feeder switching mechanism at zero crossing points respectively.
In a preferred but non-limiting embodiment of the present invention, the three left half-bridge circuits correspond to the three phases a, B and C of the feeder switching mechanism, respectively, to form an a-phase half-bridge circuit, a B-phase half-bridge circuit and a C-phase half-bridge circuit.
In the preferred but non-limiting embodiment of the invention, the A-phase half-bridge circuit, the B-phase half-bridge circuit and the C-phase half-bridge circuit are all independent half-bridge circuits, and the independent half-bridge circuits are formed by connecting an upper bridge arm and a lower bridge arm in series; the upper bridge arm and the lower bridge arm are directly connected in series by a controllable switching device, and the controllable switching device is connected with a unidirectional diode in parallel; the output ends of the three independent half-bridge circuits are respectively connected with the positive ends of the three single-phase electromagnetic actuating mechanisms, and the three single-phase electromagnetic actuating mechanisms form a feeder switch mechanism.
In a preferred but non-limiting embodiment of the invention, the single-phase electromagnetic actuator is an electrically controlled circuit breaker.
In a preferred but non-limiting embodiment of the present invention, the specific structures of the a-phase half-bridge circuit, the B-phase half-bridge circuit and the C-phase half-bridge circuit include:
the switching tube I Q1 and the switching tube II Q2 serving as controllable switching devices are connected in series to form an A-phase half-bridge circuit, the switching tube III Q3 and the switching tube IV Q4 serving as the controllable switching devices are connected in series to form a B-phase half-bridge circuit, and the switching tube five Q5 and the switching tube six Q6 serving as the controllable switching devices are connected in series to form a C-phase half-bridge circuit;
diode one D1, diode two D2, diode three D3, diode four D4, diode five D5 and diode six D6 which are unidirectional diodes are respectively connected with the drain electrode and the source electrode of the switch tube one Q1, the drain electrode and the source electrode of the switch tube two Q2, the drain electrode and the source electrode of the switch tube three Q3, the drain electrode and the source electrode of the switch tube four Q4, the drain electrode and the source electrode of the switch tube five Q5 and the drain electrode and the source electrode of the switch tube six Q6 in parallel;
the grid electrode of the switching tube I Q1 is connected with an A-phase upper tube control signal, the grid electrode of the switching tube II Q2 is connected with an A-phase lower tube control signal, the grid electrode of the switching tube III Q3 is connected with a B-phase upper tube control signal, the grid electrode of the switching tube IV Q4 is connected with a B-phase lower tube control signal, the grid electrode of the switching tube V Q5 is connected with a C-phase upper tube control signal, and the grid electrode of the switching tube V Q6 is connected with a C-phase lower tube control signal;
the connection part of the source electrode of the switching tube I Q1 and the drain electrode of the switching tube II Q2 serving as the output end of the independent half-bridge circuit is connected to the positive end of the A-phase electromagnetic actuating mechanism serving as the single-phase electromagnetic actuating mechanism, the connection part of the source electrode of the switching tube III Q3 and the drain electrode of the switching tube IV Q4 serving as the output end of the independent half-bridge circuit is connected to the positive end of the B-phase electromagnetic actuating mechanism serving as the single-phase electromagnetic actuating mechanism, and the connection part of the source electrode of the switching tube V Q5 serving as the output end of the independent half-bridge circuit and the drain electrode of the switching tube VI Q6 is connected to the positive end of the C-phase electromagnetic actuating mechanism serving as the single-phase electromagnetic actuating mechanism.
In the preferred but non-limiting embodiment of the invention, the public right half bridge is formed by connecting an upper bridge arm and a lower bridge arm in series, wherein the upper bridge arm and the lower bridge arm are directly connected in series by a controllable switch device, and the controllable switch device is connected with a unidirectional diode in parallel; the output end of the public right half-bridge is connected in parallel with the negative ends of the three single-phase electromagnetic actuating mechanisms.
In a preferred but non-limiting embodiment of the present invention, the specific structure of the common right half-bridge comprises:
the source electrode of the switching tube seven Q7 serving as the output end of the public right half bridge and the drain electrode of the switching tube eight Q8 are connected to the negative end of the A-phase electromagnetic actuating mechanism, the negative end of the B-phase electromagnetic actuating mechanism and the negative end of the C-phase electromagnetic actuating mechanism; the diode seven D7 and the diode eight D8 are respectively connected in parallel with the drain and the source of the switching tube seven Q7 and the drain and the source of the switching tube eight Q8.
In a preferred but non-limiting embodiment of the invention, the hybrid full-bridge circuit realizes that during the opening and closing of three phases of the feeder switch mechanism respectively at zero crossing points, when the feeder switch needs three phases of A phase, B phase and C phase of the feeder switch mechanism to act simultaneously, the upper bridge arms of the three left half-bridges are conducted through control signals, and the lower bridge arms of the public right half-bridge are conducted through control signals; the positive current flows from the upper bridge arm of the three left half-bridges to the positive ends of the three single-phase electromagnetic actuating mechanisms, and then flows from the negative ends of the three single-phase electromagnetic actuating mechanisms into the negative electrode through the lower bridge arm of the public right half-bridge; the three single-phase electromagnetic actuating mechanisms start to act through current excitation at the same time, so that the feeder switching mechanism is pushed, and the action when the phases A, B and C of the feeder switching mechanism are identical is completed.
In a preferred but non-limiting embodiment of the present invention, when the feeder switch requires three phases of the a phase, the B phase and the C phase of the feeder switch mechanism to act simultaneously, the method specifically includes:
switching tubes Q1 and Q4 serving as upper bridge arms of the A-phase half-bridge circuit and six Q6 serving as lower bridge arms of the C-phase half-bridge circuit are respectively conducted through an A-phase upper tube control signal, a B-phase upper tube control signal and a C-phase upper tube control signal serving as control signals, and switching tubes Q2 and Q4 serving as lower bridge arms of the A-phase half-bridge circuit and six Q6 serving as lower bridge arms of the C-phase half-bridge circuit are respectively not conducted through an A-phase lower tube control signal and a B-phase lower tube control signal; the switch tube eight Q8 serving as a lower bridge arm of the public right half bridge is conducted through a control signal of a lower arm of the public right half bridge, and the switch tube seven Q7 serving as an upper bridge arm of the public right half bridge is not conducted through a control signal of an upper arm of the public right half bridge; the positive pole VH+ current is respectively supplied to the positive end of the A-phase electromagnetic actuating mechanism, the positive end of the B-phase electromagnetic actuating mechanism and the positive end of the C-phase electromagnetic actuating mechanism through a first Q1, a third Q3 and a fifth Q5 of the upper bridge arm of the three left half bridges, and then flows into the negative pole through a eighth Q8 of the switch tube of the public right half bridge through the negative end of the A-phase electromagnetic actuating mechanism, the negative end of the B-phase electromagnetic actuating mechanism and the negative end of the C-phase electromagnetic actuating mechanism; the three electromagnetic actuating mechanisms start to act through current excitation at the same time, so that the feeder switching mechanism is pushed, and the action of the feeder switching mechanism when the phase A, the phase B and the phase C are the same is completed.
In a preferred but non-limiting embodiment of the invention, the hybrid full-bridge circuit realizes that the upper bridge arms of the three left half-bridges are conducted through the time sequence control of the control signals when the feeder switch needs the time sequence action of the three phases of A phase, B phase and C phase of the feeder switch mechanism during the opening and closing of the three phases of the feeder switch mechanism respectively at zero crossing points, and the lower bridge arms of the public right half-bridge are conducted through the control signals according to the time sequence requirement; the positive current flows to the positive end of the corresponding single-phase electromagnetic actuating mechanism through the upper bridge arm of the left half bridge which is opened according to the time sequence requirement, and then flows to the negative electrode through the lower bridge arm of the public right half bridge through the negative end of the corresponding single-phase electromagnetic actuating mechanism; the corresponding single-phase electromagnetic actuating mechanism starts to act through current excitation at the same time, so that the feeder switching mechanism is pushed, and the time sequence action of the three phases of A phase, B phase and C phase of the feeder switching mechanism is completed.
In a preferred but non-limiting embodiment of the present invention, when the feeder switch needs to operate in time sequence with three phases of a phase a, B and C of the feeder switch mechanism, switching transistors Q1 as an upper bridge arm of the a phase half-bridge circuit, switching transistors Q3 as an upper bridge arm of the B phase half-bridge circuit, and switching transistors five Q5 as an upper bridge arm of the C phase half-bridge circuit are respectively turned on with a phase a upper pipe control signal and a phase B upper pipe control signal and a phase C upper pipe control signal according to time sequence requirements, switching transistors Q2 as a lower bridge arm of the a phase half-bridge circuit, switching transistors Q4 as a lower bridge arm of the B phase half-bridge circuit and switching transistors six Q6 as a lower bridge arm of the C phase half-bridge circuit are respectively turned off with a phase a lower pipe control signal and a phase B lower pipe control signal; the switch tube eight Q8 serving as a lower bridge arm of the public right half bridge is conducted through a control signal of the lower arm of the public right half bridge, and the switch tube seven Q7 serving as an upper bridge arm of the public right half bridge is not conducted through a control signal of the lower arm of the public right half bridge; the positive electrode VH+ current respectively reaches the positive end of the A-phase electromagnetic actuating mechanism, the positive end of the B-phase electromagnetic actuating mechanism and the positive end of the C-phase electromagnetic actuating mechanism through a first Q1 switch tube, a third Q3 switch tube and a fifth Q5 switch tube of the three left half-bridges according to the time sequence, and flows into the negative electrode through a eighth Q8 switch tube of the public right half-bridge through the negative end of the A-phase electromagnetic actuating mechanism, the negative end of the B-phase electromagnetic actuating mechanism and the negative end of the C-phase electromagnetic actuating mechanism; the three electromagnetic actuating mechanisms start to act through current excitation at the same time, so that the feeder switch mechanism is pushed, and three phases of A phase, B phase and C phase of the feeder switch mechanism are completed to act in time sequence.
Compared with the prior art, the three-phase feeder switch has the advantages that zero crossing action can be realized, and the service life of the switch is prolonged. The invention adopts the circuit structure of the public right half bridge, so that the circuit power elements are reduced, the miniaturization of the system is realized, and the manufacturing cost is reduced.
The present disclosure can be a system, method, and/or computer program product. The computer program product can include a computer-readable backup medium having computer-readable program instructions embodied thereon for causing a processor to perform the various aspects of the present disclosure.
The computer readable backup medium can be a tangible power grid line capable of holding and backing up instructions for execution of the power grid line exercise by the instructions. The computer readable backup medium can be, but is not limited to, an electrical backup power grid line, a magnetic backup power grid line, an optical backup power grid line, an electromagnetic backup power grid line, a semiconductor backup power grid line, or any suitable combination of the foregoing. Still further examples (non-enumerated list) of the computer-readable backup medium include: portable computer disk, hard disk, random access backup (RAM), read-only backup (ROM), erasable programmable read-only backup (EPROM or flash memory), static random access backup (SRAM), portable compact disk read-only backup (HD-ROM), digital versatile disk (DXD), memory stick, floppy disk, mechanical coded electrical wiring, punch card like with instructions backed up thereon, or bump structures in grooves, optionally in combination with the above. The computer-readable backup medium as used herein is not to be construed as a transitory signal itself, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (as an optical pulse through a transmission line cable), or an electrical signal transmitted through an electrical wire.
The computer readable program instructions expressed herein can be downloaded from a computer readable backup medium to the respective extrapolated/processed power grid lines or downloaded to an external computer or external backup power grid line via a network, like the internet, a local area network, a wide area network, and/or a wireless network. The network can include copper transmission cables, transmission lines, wireless transmissions, routers, firewalls, switches, gateway computers and/or edge servers. The network interface or network adapter card in each of the extrapolated/processed power grid lines receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable backup medium in each of the extrapolated/processed power grid lines.
The computer program instructions for performing the operations of the present disclosure can be assembler instructions, instruction set architecture (lSA) instructions, machine-related instructions, microcode, firmware instructions, condition definition values, or source code or object code written in a random convergence of one or more programming languages, including an object oriented programming language such as Sdalltala, H++ or the like, as opposed to conventional procedural programming languages, such as the "H" programming language or similar programming languages. The computer readable program instructions can be executed entirely on the client computer, partly on the client computer, as a stand-alone software package, partly on the client computer and partly on a remote computer or entirely on the remote computer or server. In the case of remote computers, the remote computer can be connected to the client computer through a random network, including a local area network (LAb) or a wide area network (WAb), or can be connected to an external computer (as if an internet service provider were employed to connect through the internet). In some embodiments, aspects of the present disclosure are achieved by personalizing electronic circuitry, like programmable logic circuits, field Programmable Gate Arrays (FPGAs), or Programmable Logic Arrays (PLAs), with status values of computer readable program instructions, which are capable of executing the computer readable program instructions.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, and any modifications and equivalents are intended to be encompassed by the scope of the claims.
Claims (10)
1. The control method for the split-phase magnetic control switch switching operation is characterized by comprising the following steps:
the feeder switch control circuit is connected with the feeder switch mechanism and consists of a mixed full-bridge circuit consisting of three left half-bridges and a public right half-bridge;
the mixed full-bridge circuit realizes the opening and closing of three phases of the feeder switching mechanism at zero crossing points respectively.
2. The method for controlling split-phase magnetically controlled switching operation according to claim 1, wherein the three left half-bridge circuits correspond to three phases of a phase, B phase and C phase of the feeder switching mechanism, respectively, to form an a-phase half-bridge circuit, a B-phase half-bridge circuit and a C-phase half-bridge circuit.
3. The control method of split-phase magnetically controlled switch switching operation according to claim 2, wherein the phase A half-bridge circuit, the phase B half-bridge circuit and the phase C half-bridge circuit are all independent half-bridge circuits, and the independent half-bridge circuits are formed by connecting an upper bridge arm and a lower bridge arm in series; the upper bridge arm and the lower bridge arm are directly connected in series by a controllable switching device, and the controllable switching device is connected with a unidirectional diode in parallel; the output ends of the three independent half-bridge circuits are respectively connected with the positive ends of the three single-phase electromagnetic actuating mechanisms, and the three single-phase electromagnetic actuating mechanisms form a feeder switch mechanism.
4. The method for controlling the switching operation of a split-phase magnetic control switch according to claim 3, wherein the single-phase electromagnetic actuator is an electrically controlled circuit breaker.
5. The method for controlling split-phase magnetically controlled switching operation according to claim 3, wherein the specific structures of the a-phase half-bridge circuit, the B-phase half-bridge circuit and the C-phase half-bridge circuit comprise:
the switching tube I Q1 and the switching tube II Q2 serving as controllable switching devices are connected in series to form an A-phase half-bridge circuit, the switching tube III Q3 and the switching tube IV Q4 serving as the controllable switching devices are connected in series to form a B-phase half-bridge circuit, and the switching tube five Q5 and the switching tube six Q6 serving as the controllable switching devices are connected in series to form a C-phase half-bridge circuit;
diode one D1, diode two D2, diode three D3, diode four D4, diode five D5 and diode six D6 which are unidirectional diodes are respectively connected with the drain electrode and the source electrode of the switch tube one Q1, the drain electrode and the source electrode of the switch tube two Q2, the drain electrode and the source electrode of the switch tube three Q3, the drain electrode and the source electrode of the switch tube four Q4, the drain electrode and the source electrode of the switch tube five Q5 and the drain electrode and the source electrode of the switch tube six Q6 in parallel;
the grid electrode of the switching tube I Q1 is connected with an A-phase upper tube control signal, the grid electrode of the switching tube II Q2 is connected with an A-phase lower tube control signal, the grid electrode of the switching tube III Q3 is connected with a B-phase upper tube control signal, the grid electrode of the switching tube IV Q4 is connected with a B-phase lower tube control signal, the grid electrode of the switching tube V Q5 is connected with a C-phase upper tube control signal, and the grid electrode of the switching tube V Q6 is connected with a C-phase lower tube control signal;
the connection part of the source electrode of the switching tube I Q1 and the drain electrode of the switching tube II Q2 serving as the output end of the independent half-bridge circuit is connected to the positive end of the A-phase electromagnetic actuating mechanism serving as the single-phase electromagnetic actuating mechanism, the connection part of the source electrode of the switching tube III Q3 and the drain electrode of the switching tube IV Q4 serving as the output end of the independent half-bridge circuit is connected to the positive end of the B-phase electromagnetic actuating mechanism serving as the single-phase electromagnetic actuating mechanism, and the connection part of the source electrode of the switching tube V Q5 serving as the output end of the independent half-bridge circuit and the drain electrode of the switching tube VI Q6 is connected to the positive end of the C-phase electromagnetic actuating mechanism serving as the single-phase electromagnetic actuating mechanism.
6. The method for controlling split-phase magnetic control switch switching operation according to claim 3, wherein the public right half bridge is formed by connecting an upper bridge arm and a lower bridge arm which are integrated in series, the upper bridge arm and the lower bridge arm are directly connected in series by a controllable switching device, and the controllable switching device is connected with a unidirectional diode in parallel; the output end of the public right half-bridge is connected in parallel with the negative ends of the three single-phase electromagnetic actuating mechanisms.
7. The method for controlling split-phase magnetically controlled switching operation according to claim 6, wherein the specific structure of the common right half-bridge comprises:
the source electrode of the switching tube seven Q7 serving as the output end of the public right half bridge and the drain electrode of the switching tube eight Q8 are connected to the negative end of the A-phase electromagnetic actuating mechanism, the negative end of the B-phase electromagnetic actuating mechanism and the negative end of the C-phase electromagnetic actuating mechanism; the diode seven D7 and the diode eight D8 are respectively connected in parallel with the drain and the source of the switching tube seven Q7 and the drain and the source of the switching tube eight Q8.
8. The control method for split-phase magnetically controlled switch switching operation according to claim 6, wherein during the period that the hybrid full-bridge circuit realizes that three phases of the feeder switch mechanism are opened and closed at zero crossing points respectively, when the feeder switch needs three phases of A phase, B phase and C phase of the feeder switch mechanism to act simultaneously, the upper bridge arms of the three left half-bridges are conducted through control signals, and the lower bridge arms of the public right half-bridges are conducted through control signals; the positive current flows from the upper bridge arm of the three left half-bridges to the positive ends of the three single-phase electromagnetic actuating mechanisms, and then flows from the negative ends of the three single-phase electromagnetic actuating mechanisms into the negative electrode through the lower bridge arm of the public right half-bridge; the three single-phase electromagnetic actuating mechanisms start to act through current excitation at the same time, so that the feeder switching mechanism is pushed, and the action when the phases A, B and C of the feeder switching mechanism are identical is completed.
9. The method for controlling split-phase magnetically controlled switching operation according to claim 8, wherein when the feeder switch requires three phases of a phase, B phase and C phase of the feeder switching mechanism to act simultaneously, the method specifically comprises:
switching tubes Q1 and Q4 serving as upper bridge arms of the A-phase half-bridge circuit and six Q6 serving as lower bridge arms of the C-phase half-bridge circuit are respectively conducted through an A-phase upper tube control signal, a B-phase upper tube control signal and a C-phase upper tube control signal serving as control signals, and switching tubes Q2 and Q4 serving as lower bridge arms of the A-phase half-bridge circuit and six Q6 serving as lower bridge arms of the C-phase half-bridge circuit are respectively not conducted through an A-phase lower tube control signal and a B-phase lower tube control signal; the switch tube eight Q8 serving as a lower bridge arm of the public right half bridge is conducted through a control signal of a lower arm of the public right half bridge, and the switch tube seven Q7 serving as an upper bridge arm of the public right half bridge is not conducted through a control signal of an upper arm of the public right half bridge; the positive pole VH+ current is respectively supplied to the positive end of the A-phase electromagnetic actuating mechanism, the positive end of the B-phase electromagnetic actuating mechanism and the positive end of the C-phase electromagnetic actuating mechanism through a first Q1, a third Q3 and a fifth Q5 of the upper bridge arm of the three left half bridges, and then flows into the negative pole through a eighth Q8 of the switch tube of the public right half bridge through the negative end of the A-phase electromagnetic actuating mechanism, the negative end of the B-phase electromagnetic actuating mechanism and the negative end of the C-phase electromagnetic actuating mechanism; the three electromagnetic actuating mechanisms start to act through current excitation at the same time, so that the feeder switching mechanism is pushed, and the action of the feeder switching mechanism when the phase A, the phase B and the phase C are the same is completed.
10. The control method of split-phase magnetically controlled switch switching operation according to claim 8, wherein during the period that the hybrid full-bridge circuit realizes that three phases of the feeder switch mechanism are opened and closed at zero crossing points respectively, when the feeder switch needs to have time sequence actions on three phases of A phase, B phase and C phase of the feeder switch mechanism, the upper bridge arms of the three left half-bridges are conducted according to time sequence requirements through time sequence control of control signals, and the lower bridge arms of the public right half-bridges are conducted through control signals; the positive current flows to the positive end of the corresponding single-phase electromagnetic actuating mechanism through the upper bridge arm of the left half bridge which is opened according to the time sequence requirement, and then flows to the negative electrode through the lower bridge arm of the public right half bridge through the negative end of the corresponding single-phase electromagnetic actuating mechanism; the corresponding single-phase electromagnetic actuating mechanism starts to act through current excitation at the same time, so that the feeder switching mechanism is pushed to finish the time sequence action of the three phases of A phase, B phase and C phase of the feeder switching mechanism;
when the feeder switch needs to act in time by three phases of A phase, B phase and C phase of the feeder switch mechanism, switching tubes Q1 and Q3 serving as an upper bridge arm of the A phase half-bridge circuit and switching tubes five Q5 serving as an upper bridge arm of the B phase half-bridge circuit are respectively conducted with C phase upper tube control signals through A phase upper tube control signals and B phase upper tube control signals according to time requirements, and switching tubes Q2 and Q4 serving as a lower bridge arm of the A phase half-bridge circuit and six Q6 serving as a lower bridge arm of the C phase half-bridge circuit are respectively not conducted with C phase lower tube control signals through A phase lower tube control signals and B phase lower tube control signals; the switch tube eight Q8 serving as a lower bridge arm of the public right half bridge is conducted through a control signal of the lower arm of the public right half bridge, and the switch tube seven Q7 serving as an upper bridge arm of the public right half bridge is not conducted through a control signal of the lower arm of the public right half bridge; the positive electrode VH+ current respectively reaches the positive end of the A-phase electromagnetic actuating mechanism, the positive end of the B-phase electromagnetic actuating mechanism and the positive end of the C-phase electromagnetic actuating mechanism through a first Q1 switch tube, a third Q3 switch tube and a fifth Q5 switch tube of the three left half-bridges according to the time sequence, and flows into the negative electrode through a eighth Q8 switch tube of the public right half-bridge through the negative end of the A-phase electromagnetic actuating mechanism, the negative end of the B-phase electromagnetic actuating mechanism and the negative end of the C-phase electromagnetic actuating mechanism; the three electromagnetic actuating mechanisms start to act through current excitation at the same time, so that the feeder switch mechanism is pushed, and three phases of A phase, B phase and C phase of the feeder switch mechanism are completed to act in time sequence.
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| CN118137435A (en) * | 2024-04-30 | 2024-06-04 | 山东德源电力科技股份有限公司 | Magnetic control switch control method and system based on mechanical lock catch |
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| CN118137435A (en) * | 2024-04-30 | 2024-06-04 | 山东德源电力科技股份有限公司 | Magnetic control switch control method and system based on mechanical lock catch |
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