CN107994680B - Intelligent high-voltage dual-power automatic switching device - Google Patents
Intelligent high-voltage dual-power automatic switching device Download PDFInfo
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- CN107994680B CN107994680B CN201711438470.6A CN201711438470A CN107994680B CN 107994680 B CN107994680 B CN 107994680B CN 201711438470 A CN201711438470 A CN 201711438470A CN 107994680 B CN107994680 B CN 107994680B
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- 238000004146 energy storage Methods 0.000 claims abstract description 158
- 230000003068 static effect Effects 0.000 claims abstract description 54
- 230000009471 action Effects 0.000 claims description 86
- 230000009351 contact transmission Effects 0.000 claims description 60
- 230000001960 triggered effect Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 description 32
- 238000002955 isolation Methods 0.000 description 25
- 230000033001 locomotion Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
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- 238000009826 distribution Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010230 functional analysis Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
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- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses an intelligent high-voltage dual-power automatic switching device which comprises a first incoming line switch cabinet connected with mains supply, a second incoming line switch cabinet and a main control cabinet connected with electric equipment, wherein when the first incoming line switch cabinet is powered on by high voltage, the second incoming line switch cabinet is powered off, the first incoming line switch cabinet comprises a first main switch, the first main switch comprises a first moving contact, a first static contact seat and a first energy storage shaft for driving the first moving contact to be switched on and off, the second incoming line switch cabinet comprises a second main switch, the second main switch comprises a second moving contact, a second static contact seat and a second energy storage shaft for driving the second moving contact to be switched on and off, the main control cabinet comprises a vacuum circuit breaker, the vacuum circuit breaker comprises a vacuum moving contact, a static contact seat and a main control energy storage shaft for driving the vacuum moving contact to be switched on and off, and the switching-on safety performance of the dual-power switch cabinet is improved and the switching time is shortened through the system.
Description
Technical Field
The invention relates to the field of power distribution cabinets, in particular to an intelligent high-voltage dual-power automatic switching device.
Background
Along with the development of industrial economy and popularization and development of electronic automation technology in China, the development of social economy and development and progress of electric power industry are promoted, and for this reason, the idea of improving the power supply reliability with little or no power failure is more and more intense along with the progress of times, the development of social economy, the application of industrial automation technology and the like in order to adapt to the requirements of electric power development and vast users. Therefore, before the previous years, countless power transmission and transformation equipment manufacturing enterprises have developed high-voltage double-power automatic switching device products with various types of structures in succession under the initiative of the national power grid company, but the basic structure is usually a structure phenomenon that two incoming line switch cabinets and one main control cabinet are combined or directly formed by the two incoming line switch cabinets and a controller, and under normal conditions, one incoming line switch cabinet is used as a main power supply, and the other incoming line switch cabinet is in a switching-off state. When the controller detects a signal that the power supply of the power supply is out of voltage or under voltage and the standby power supply normally has electricity, the main switch electric appliance on the incoming line switch cabinet in the power supply state is automatically switched off, and then the main switch electric appliance on the incoming line switch cabinet in the standby power supply state is switched on. However, in such a high-voltage dual-power automatic switching device product, after the main switching device bears the function of automatic switching action, the requirement that the power distribution equipment powered by the dual power supply has visible obvious break points cannot be met. In addition, the analysis is carried out according to the type of the main switching device which can be configured: if the main switch appliance adopts common load switch equipment, the electric life time of the main switch appliance can only bear about hundred times at most, which is inconsistent with the requirement of the high-voltage double-power automatic switching device that more electric life time is ensured because more frequent actions are required compared with the conventional electric equipment; if the main switch electrical appliance adopts a vacuum switch or a vacuum load switch device, the requirement of visible obvious fracture points cannot be met, and the time of automatic switching action is required to be within 20-30 seconds, so that the functional requirement that the power supply conversion of the high-voltage automatic switching device needs to be switched as quickly as possible and is generally completed within 10 seconds according to the characteristic of electric equipment cannot be met; if the main switch appliance adopts SF6 switch equipment, the problems of environmental protection and the like are involved, so that the main switch appliance is taken as obsolete equipment by multi-city power grid companies and the whole country in the future, and the SF6 switch equipment also has the problem of whether the main switch appliance really has obvious fracture points; and according to the design structural analysis of the high-voltage dual-power automatic switching device products supplied in the current market, if a certain path of equipment of the incoming line switch cabinet has a problem, even if the problem is very small, the equipment needs to be overhauled or needs to be maintained daily, the operation can be performed after the power supply in the power supply state is cut off, the aim of supplying power by the dual-power is not met, and the probability of multiple power failure of electric equipment is increased. Therefore, the high-voltage dual-power automatic switching device products currently available in the market have serious defects from various functional analysis.
Furthermore, the high-voltage power transmission and distribution equipment is provided with a power utilization department unit of a high-voltage double-power automatic switching device product, and the requirement of the power supply reliability is required to be met, so that the power utilization department unit has to put higher requirements on the power supply quality, the avoidance or the few power failure and other problems. If the quality of the power supply, the reliability of the power supply and the like are not guaranteed, the economy of the power utilization department units is seriously influenced to stop production and stop finance, social problems can be caused, and life is in danger. Therefore, the technical level, the advancement, the reliability and other factors of the high-voltage dual-power automatic switching device product are more relevant to national economy, social political stability, safety and life of electricity utilization personnel and the like. Therefore, the research and development of the high-voltage dual-power automatic switching device products are paid attention to by the power utilization department, and the high-voltage dual-power automatic switching device products are standardized by the power utilization department and the national social management function department.
Disclosure of Invention
The invention aims to provide an intelligent high-voltage dual-power automatic switching device which is rapid in switching, safe and reliable, and can ensure that electric equipment is powered by power supply during general routine overhaul and maintenance.
The aim is achieved by the following technical means: the utility model provides an intelligent high-voltage dual-power automatic switching control equipment, is including the first inlet wire switch cabinet that is connected with first high-voltage commercial power, be connected with the second inlet wire switch cabinet of second high-voltage commercial power and the master control cabinet of connection consumer, when first inlet wire switch cabinet switched on first high-voltage commercial power, second inlet wire switch cabinet then breaks off with the second high-voltage commercial power, first inlet wire switch cabinet includes first main switch, and first main switch includes first moving contact, first static contact and drives the first energy storage axle of first moving contact divide-shut brake, second inlet wire switch cabinet includes the second main switch, and the second main switch includes second moving contact, second static contact and drives the second energy storage axle of second moving contact divide-shut brake, the master control cabinet includes vacuum circuit breaker, and vacuum circuit breaker includes vacuum moving contact, the static contact and drives the master control energy storage axle of vacuum moving contact divide-shut brake, its characterized in that still includes control first main switch, second main switch and vacuum circuit breaker divide-shut brake, control circuit includes:
the main control switching-off circuit comprises a first main control switching-off circuit, when a controller on a main control cabinet receives signals of voltage loss or undervoltage or undercurrent of a first high-voltage commercial power and normal power of a second high-voltage commercial power, the controller triggers a first switching-off contact point to conduct in a click mode and switch on a contact action of a first switching-off relay of the first main control switching-off circuit to lock, so that the first main control switching-off circuit is in a conducting state continuously, a main control tripping switching-off coil is electrified, a main control moving contact transmission shaft tripping action is promoted to enable a vacuum moving contact to switch off, and then a first switching-off signal is sent to the first switching-off circuit and a main control switching-off state signal is sent to a first switching-on safety circuit;
The first switching-off circuit is used for receiving a first switching-off signal sent by the first main control switching-off circuit and triggering a first trip switching-off coil to act, so that a first moving contact transmission shaft is caused to trip to enable the first moving contact to switch off, then a first switching-off state signal is sent to the first switching-on safety circuit, and then the controller receives the main control switching-off state signal and the first switching-off state signal, then sends a second switching-on signal to the second switching-on circuit and sends a main control switching-on signal to the main control switching-on circuit; the second switching-on circuit is used for receiving the second switching-on signal, triggering the second motor to drive the second energy storage shaft to rotate and enabling the second movable contact to be switched on with the second static contact seat;
the main control switching-on circuit is used for receiving the main control switching-on signal and triggering the main control motor to drive the main control energy storage shaft to rotate so as to switch on the vacuum movable contact and the vacuum static contact seat;
the first energy storage circuit is used for controlling the first energy storage shaft to continuously rotate towards a closing state and controlling the first energy storage shaft to stop at the closing state;
and the first reset circuit is used for delaying the disconnection time of the main control switching-off circuit and sending a starting signal of the first energy storage circuit after the delay time is triggered.
Further optimizing to: the main control brake separating circuit comprises a first brake separating contact, a second brake separating contact, a first main control brake separating circuit and a second main control brake separating circuit which are controlled by the controller; the controller sends an automatic switching brake-separating action command when receiving signals of voltage loss or under-voltage or under-current of the power supply and normal electricity of the standby power supply, and triggers the first brake-separating contact or the second brake-separating contact to conduct in a point-to-point mode; the first main control brake separating circuit and the second main control brake separating circuit trigger the contact action of the first brake separating relay or the second brake separating relay and lock the self circuit after the first main control brake separating circuit or the second main control brake separating circuit receives the first brake separating contact or the second brake separating contact point-acting power supply, so that the self circuit is in a conducting state continuously, and triggers the main control trip brake separating coil action, and the main control moving contact transmission shaft tripping action is promoted to cause the vacuum moving contact brake separating.
Further optimizing to: the first brake separating circuit comprises a normally open contact of a first brake separating relay for receiving the first brake separating signal, and when the normally open contact of the first brake separating relay is closed after the first brake separating signal is received, a first trip brake separating coil acts, a first moving contact transmission shaft is caused to trip to act, the first moving contact is separated, a first limit relay acts in a brake separating process, and the first limit relay sends a first brake separating state signal to a first brake closing safety circuit after the brake separating of the first moving contact transmission shaft.
Further optimizing to: the second switching-on circuit comprises a second switching-on contact used for receiving the second switching-on signal, the second switching-on contact is closed after the second switching-on signal is received, the second energy storage shaft is driven to rotate to drive the second moving contact to switch on with the second static contact seat, the second auxiliary relay is triggered after switching on, the normally closed contact of the second auxiliary relay connected in series in the second switching-on circuit is triggered to be disconnected after switching on, and the continuous rotation of the second energy storage shaft is stopped.
Further optimizing to: the main control switching-on circuit comprises a third switching-on contact which is used for receiving a main control switching-on signal and is controlled by the controller, when the main control switching-on signal is received, the third switching-on contact is closed and drives the main control energy storage shaft to rotate so that the vacuum movable contact and the vacuum static contact are switched on, the main control auxiliary relay is triggered in the switching-on process, and the main control auxiliary relay triggers the normally closed contact of the main control auxiliary relay connected in series in the main control switching-on circuit to be disconnected after switching-on, so that the continuous rotation of the main control energy storage shaft is stopped.
Further optimizing to: the first reset circuit comprises a first brake separating relay normally open contact and a first auxiliary relay normally closed contact which are mutually connected in series, the first brake separating relay normally open contact is closed when the first main control brake separating circuit is conducted and the first brake separating relay coil is electrified, the first auxiliary normally closed contact is closed after the brake separating action of the first movable contact transmission shaft is completed, when the first brake separating relay normally open contact and the first auxiliary normally closed contact are both closed, the first time delay relay is electrified and timed, and the first time delay relay normally closed contact is connected in series in the first reset circuit and the main control brake separating circuit.
Further optimizing to: the first energy storage circuit comprises a normally closed contact of a first switching-off relay, when a first delay relay of the first reset circuit is powered on and after delay action, the first switching-off relay arranged in the first reset circuit loses power, when the first switching-off relay loses power, the normally closed contact of the first switching-off relay in the first energy storage circuit is closed to switch on the first energy storage circuit so as to drive the first energy storage shaft to rotate in a closing direction and touch the first limit relay when the first energy storage shaft is in a closing state, and the first limit relay acts so that the first limit normally closed contact connected in series in the first energy storage circuit is disconnected and the first energy storage shaft stops rotating to stop in the closing state.
Compared with the prior art, the invention has the advantages that: when the controller receives signals of voltage loss or undervoltage or current shortage of the first high-voltage commercial power supply source or normal electricity of the second high-voltage commercial power supply source and the standby power source, the controller sends an automatic switching-off action command to trigger the first main control switching-off circuit or the second main control switching-off circuit to be conducted, so that the vacuum circuit breaker of the main control cabinet is switched off, after the vacuum circuit breaker of the main control cabinet is switched off, the first main switch of the first incoming line switch cabinet or the second main switch of the second incoming line switch cabinet which is in switching-on as the current voltage loss or undervoltage or current shortage is triggered, then the first switching-off reset circuit or the second switching-off reset circuit, the second switching-off circuit or the first switching-off circuit and the main control switching-on circuit are simultaneously started, and the switching-on time of the main control switching-off mechanism controlled by the first main control switching-off circuit is longer than that of the second main switch controlled by the second main switching-off circuit or the first switching-off circuit, the switching-on action is finished after the vacuum circuit breaker of the main control cabinet is switched off, automatic switching-off of the double power supply switch cabinet is realized, and after the first switching-off reset circuit or the second switching-off time of the first switching-off circuit is reduced in the first switching-off time of the first incoming line reset circuit or the second switching-off circuit, and the energy storage circuit is switched on in the first switching-off mode, and the energy storage circuit is started after the first switching-off time is reset, and the switching-off time of the first switching-off circuit is in the switching-off circuit, and has a switching-off circuit and has a switching-mode switching-off circuit switching circuit: the sequence of the main control cabinet opening, the first incoming line switch cabinet opening or the second incoming line switch cabinet opening, the second incoming line switch cabinet closing or the first incoming line switch cabinet closing and the main control cabinet closing can improve the service life of the whole system switch cabinet, because the first main switch and the second main switch are the opening and closing actions realized under the condition of no current, the phenomenon that the moving and static contact seat is ablated during opening and closing is avoided, the arc extinguishing function is borne by the vacuum circuit breaker, the electric life of an isolation fracture is prolonged, and the equipment cost can be reduced. The switching-on and switching-off sequence is more reasonable; meanwhile, the step of energy storage pre-action is added, so that a switching-on mechanism of the standby switch cabinet is in a pre-switching-on state, and when automatic switching is needed, the automatic switching time is greatly reduced; from the above process, it can be obtained: when the power supply in the power supply state loses voltage or is undervoltage or undercurrent, the device automatically and rapidly opens the vacuum circuit breaker on the main control cabinet and the isolation break with obvious visible break points on the incoming line switch cabinet in the power supply state to cut off the power supply in the voltage loss or undervoltage or undercurrent, rapidly closes the isolation break with obvious visible break points on the incoming line switch cabinet on the standby power supply, and closes the vacuum circuit breaker on the main control cabinet again, so that the electric equipment is automatically and rapidly switched to the circuit of the standby power supply.
Drawings
FIG. 1 is a schematic diagram of the overall fit of an embodiment dual power switch cabinet;
FIG. 2 is a schematic view of A-A of FIG. 1;
fig. 3 is a rear view of the first incoming switch cabinet of the embodiment with the rear seal plate removed;
FIG. 4 is an enlarged view of section I of FIG. 3;
FIG. 5 is a schematic view of B-B of FIG. 1;
FIG. 6 is a rear view of the master control cabinet of the embodiment with the rear closure plate removed;
FIG. 7 is an enlarged view of section II of FIG. 6;
FIG. 8 is a schematic diagram of a self-cutting control circuit of a master control cabinet according to an embodiment;
fig. 9 is a self-switching control circuit diagram of the first incoming line switch cabinet of the embodiment;
fig. 10 is a self-switching control circuit diagram of the second incoming line switch cabinet of the embodiment;
FIG. 11 is a diagram of a switching status signal and a closing fuse circuit according to an embodiment;
fig. 12 is a voltage information circuit diagram of an embodiment.
Detailed Description
The invention will now be further described by way of specific examples with reference to the accompanying drawings, which are given by way of illustration only and not by way of limitation.
Examples
The intelligent high-voltage dual-power automatic switching device comprises a first incoming line switch cabinet 1, a second incoming line switch cabinet 2 and a main control cabinet 3, wherein the mechanical structures of the first incoming line switch cabinet 1 and the second incoming line switch cabinet 2 are consistent with the electrical principles of a primary circuit and a secondary circuit, and the intelligent high-voltage dual-power automatic switching device is in a parallel structural relationship, so that the intelligent high-voltage dual-power automatic switching device is only representatively described by the mechanical structures of the first incoming line switch cabinet 1 and the main control cabinet 3 and the electrical principles of the primary circuit and the secondary circuit.
1. The intelligent high-voltage dual-power automatic switching device comprises a mechanical action mechanism 1 for on-site manual operation or electric operation, a first inlet switch cabinet 1, wherein the first inlet switch cabinet 1 is respectively provided with a first inlet cable chamber 101, a first overhaul fracture 102, a first isolation fracture chamber 103 and a first bus bar chamber 104 (see figures 1-4) from bottom to top, a first overhaul fracture static contact seat 1021 is connected with a first inlet cable to be communicated with a first high-voltage mains supply, a first static contact seat 112 in the first bus bar chamber 104 is connected with a second static contact seat 212 of a second isolation fracture in parallel and then is communicated with a vacuum static contact seat 3032 of a main control cabinet 3, a first main switch 11 is arranged in the first isolation fracture chamber 103, the high-voltage electrical switching device with dual functions of manual operation and electric operation is arranged in the first isolation fracture chamber 103, the device is used for realizing the purpose that whether a first high-voltage mains supply flows into a first bus-bar chamber 104 from a first incoming-line cable chamber 101 to a vacuum static contact seat 3032 of a main control cabinet 3, first isolation fractures 1031 and second isolation fractures 2031 of a first main switch 11 and a second main switch 21 in the first incoming-line switch cabinet 1 and the second incoming-line switch cabinet 2 are provided with obvious port points, namely, between a first moving contact 111 and the first static contact seat 112, between a second moving contact 211 and the second static contact seat 212, when the respective isolation fractures are in a separated state, the respective isolation fractures can be obviously seen to be exposed in the air to be in a separated state, the requirements of knowing electrical safety and reliability can be intuitively met in the processes of switching the power supply or overhauling the equipment, and the like, and the generation of electrical accident events can be avoided.
The first main switch 11 comprises a first main switch control circuit 11-1, a first movable contact 111, a first static contact seat 112, a first energy storage shaft 13, a first manual and electric operating mechanism 18, a first movable contact transmission shaft 19 and the like; when the first movable contact 111 and the first static contact seat 112 perform a closing action, the first manual or electric operation mechanism 18 manually or electrically rotates the first energy storage shaft 13 to compress the energy storage spring until zero crossing, then release energy to trigger and drive the first movable contact transmission shaft 19 to rotate by taking the axis of the first energy storage shaft 13 as the axis, the rotation of the first movable contact transmission shaft 19 drives the first movable contact 111 to move towards the first static contact seat 112 until the first movable contact 111 is in suction contact, closing action is completed, and when the first movable contact transmission shaft 19 rotates, the energy released by the first energy storage shaft 13 also simultaneously performs compression energy storage work for a first opening energy spring required by the separation movement of the first movable contact 111, and when the first movable contact 111 and the first static contact seat 112 are closed, the first movable contact transmission shaft 19 is stopped by falling down of the locking device, and is stopped in a state of being stored energy by the first opening energy spring locked by the locking device; when the first energy storage shaft 13 rotates to a fast zero crossing position, the first push plate 14 driven by the first energy storage shaft 13 together triggers the first limit relay (1 SQ2 and 1SQ 3) 12 to act, so that the corresponding normally-closed contact is disconnected, the normally-open contact is conducted, until the first energy storage shaft 13 continues to rotate to enable the energy storage spring to pass zero and then drive the first movable contact transmission shaft 19 to rotate, so that the first movable contact 111 and the first static contact seat 112 are closed, the normally-closed contact of the first limit relay (1 SQ2 and 1SQ 3) 12 continues to be in an off state, and the normally-open contact continues to be in a conducting state; after the first moving contact transmission shaft 19 rotates to enable the first moving contact 111 to be closed with the first static contact seat 112, the rotation of the first moving contact transmission shaft 19 drives the first connecting rod 15 to rotate according to the pivot and drives the first rotary table 16 to rotate, the rotation of the first rotary table 16 enables the contact of the first auxiliary relay (1F) 17 to act, the corresponding normally closed contact is opened, and the normally open contact is closed. When the first movable contact 111 and the first static contact seat 112 perform a brake separating action process, the first manual operation and the electric operation mechanism 18 manually or electrically operate to enable the first brake separating coil (1 TQ) 1-2 to be electrified, a brake separating energy spring energy storage locking device on the first movable contact transmission shaft 19 is tripped, so that the brake separating energy spring release can drive the first movable contact transmission shaft 19 to rotate by taking the first energy storage shaft 13 as an axis, the first movable contact 111 is driven to move to separate the first static contact seat 112 for brake separating, when the first movable contact transmission shaft 19 rotates to a brake separating position, the first connecting rod 15 is driven to rotate according to a fulcrum and drive the first rotary table 16 to rotate, the first rotary table 16 rotates to enable the contact of the first auxiliary relay 17 to be conducted, the normally closed contact is disconnected, and simultaneously when the first movable contact transmission shaft 19 rotates to the brake separating position, the first manual operation and the electric operation mechanism 18 is continuously operated by the first manual operation mechanism or a limit contact built-in by the electric operation system to enable the first manual operation and the electric operation mechanism 18 to be conducted by the first reset contact to the first reset operation mechanism to the original state after the first manual operation and the electric operation mechanism rotates to the first reset operation mechanism 11 is reset to the original stop state; in the resetting rotation process of the first energy storage shaft 13, when the first energy storage shaft 13 is reset and rotated from the closing position to the same position of the first limit relay (1 SQ2 and 1SQ 3) 12 triggered in the rotation motion of the first energy storage shaft 13 when the first main switch 11 performs closing motion, the first push plate 14 driven by the first energy storage shaft 13 moves away from the first limit relay (1 SQ2 and 1SQ 3) 12, so that the normally closed contact corresponding to the first limit relay is conducted, and the normally open contact is disconnected.
2. The main control cabinet 3, referring to fig. 1, 5, 6 and 7, the vacuum circuit breaker 31 of the main control cabinet 3 comprises a main control grounding contact knife 302, a vacuum movable contact 3031, a vacuum static contact seat 3032, a main control movable contact 311, a main control static contact seat 312, a main control energy storage shaft 33, a main control manual operation and electric operation mechanism 38, a main control movable contact transmission shaft 39 and the like; the closing and opening actions between the vacuum movable contact 3031 and the vacuum static contact seat 3032 are completed by the manual actions of the mechanism of the main control manual operation and electric operation mechanism 38, when the vacuum movable contact is in a breaking state, the limiting contact action built in the vacuum circuit breaker 31 is triggered, so that the vacuum circuit breaker 31 can be cut off from a main circuit for electric operation and automatic switching, and therefore, the main control isolation fracture 303 is only used as a main control cabinet 3 for isolation in the purposes of overhaul and the like; the main control grounding contact knife 302 is the same as the main control isolation fracture 303, the switching-on and switching-off actions are completed by the manual actions of the mechanism of the main control manual and electric operating mechanism 38, when the main control grounding contact knife is in a switching-on state, the limiting contact action built in the vacuum circuit breaker 31 is triggered, and the main circuit for the electric operation and automatic switching of the vacuum circuit breaker 31 can be cut off, so that the main control grounding contact knife 302 is only used as the main control cabinet 3 for grounding in the purposes of overhaul and the like; when the main control movable contact 311 and the main control static contact seat 312 perform a closing action, the main control manual and electric operating mechanism 38 manually or electrically rotates the main control energy storage shaft 33 to compress the energy storage spring, and then releases energy to trigger and drive the main control movable contact transmission shaft 39 to rotate by taking the axis of the main control energy storage shaft 33 as the axis, the main control movable contact transmission shaft 39 rotates to drive the main control movable contact 311 to move towards the main control static contact seat 312 until the attraction contact is closed, closing action is completed, when the main control movable contact transmission shaft 39 rotates, the energy released by the main control energy storage shaft 33 also simultaneously performs compression energy storage work for a main control opening energy spring required by the main control movable contact 311 for separating movement, and when the main control movable contact 311 and the main control static contact seat 312 are closed, the main control movable contact transmission shaft 39 is just stopped by a locking device, and the main control movable contact transmission shaft 39 is stopped in a state of being locked by the main control opening energy spring of the locking device; when the main control energy storage shaft 33 rotates to a fast zero crossing position, the main control push plate 34 driven by the main control energy storage shaft 33 together triggers the main control limit relay (SQ) 32 to act so as to enable the corresponding normally-closed contact to be disconnected, and the normally-open contact is conducted until the main control energy storage shaft 33 continues to rotate so as to enable the energy storage spring to drive the main control movable contact transmission shaft 39 to rotate after zero crossing so as to enable the main control movable contact 311 to be closed with the main control static contact seat 312, and then the normally-closed contact of the main control limit relay (SQ) 32 continues to be in an off state and the normally-open contact continues to be in a conducting state; after the main control movable contact 311 and the main control static contact seat 312 are closed due to the rotation of the main control movable contact transmission shaft 39, the main control movable contact transmission shaft 39 rotates to drive the main control connecting rod 35 to rotate according to the pivot and drive the main control rotary table 36 to rotate, and the main control rotary table 36 rotates to enable the contacts of the main control auxiliary relay (LW 1) 37 to act, and the corresponding normally closed contacts are opened and normally open contacts are closed. When the main control moving contact 311 and the main control static contact seat 312 perform a brake separating action process, a main control manual operation and electric operation mechanism 38 is used for manually operating or enabling a main control brake separating coil (YT) 3-2 to be electrified, a brake separating energy spring energy storage locking device on a main control moving contact transmission shaft 39 is released, so that brake separating energy spring release can drive the main control moving contact transmission shaft 39 to rotate around a main control energy storage shaft 33 as an axis, the main control moving contact 311 is driven to move to separate the main control static contact seat 312 for brake separating, when the main control moving contact transmission shaft 39 rotates to a brake separating position, a main control connecting rod 35 is driven to rotate according to a fulcrum and drive a main control turntable 36 to rotate, the contact of a main control auxiliary relay 37 is enabled to act, a normally closed contact corresponding to the main control turntable 36 is opened, and meanwhile, when the main control moving contact transmission shaft 39 rotates to a brake separating position, the main control manual operation and electric operation mechanism 38 is continuously operated by hand or a limit contact conducting reset circuit built-in by an electric operation system to enable the manual operation and electric operation mechanism 38 to perform reverse rotation until the main control energy storage shaft 33 is enabled to be in an original state of the brake separating operation system or the brake separating operation circuit is completed after the brake separating operation is reset to the original state of the electric operation system; in the resetting rotation process of the main control energy storage shaft 33, when the main control energy storage shaft 33 is reset and rotated from the closing position to the same position where the main control limit relay (SQ) 32 is triggered in the rotation motion of the main control energy storage shaft 33 when the vacuum circuit breaker 31 performs the closing motion, the main control push plate 34 driven by the main control energy storage shaft 33 moves away from the main control limit relay (SQ) 32, so that the corresponding normally closed contact is conducted, and the normally open contact is disconnected.
2. Automatic switching electric action mechanism of intelligent high-voltage dual-power automatic switching device
Referring to fig. 1 to 12, incoming cable chambers of a first incoming switch cabinet 1 and a second incoming switch cabinet 2 are respectively connected with a first high-voltage mains supply and a second high-voltage mains supply of different power supply circuits, and a main control cabinet 3 is connected with electric equipment (such as a power transformer and the like); when a certain commercial power source such as the first incoming line switch cabinet 1 or the second incoming line switch cabinet 2 is used as the current power supply incoming line cabinet of the electric equipment, another commercial power source such as the second incoming line switch cabinet 2 or the first incoming line switch cabinet 1 is used as the standby power supply incoming line cabinet of the electric equipment, the first incoming line switch cabinet 1 is assumed to be the current power supply incoming line cabinet of the electric equipment, the second incoming line switch cabinet 2 is also used as the incoming line cabinet of the standby power supply of the electric equipment, and the current power supply incoming line cabinet of the electric equipment is described by taking the first incoming line switch cabinet 1 as the electric equipment.
1. The first incoming line switch cabinet 1 automatically switches to an electrical action mechanism of opening
During normal power supply, the first service break 102 and the second service break 202 of the first incoming switch cabinet 1 and the second incoming switch cabinet 2 are both in a closing position and are respectively connected to the first high-voltage mains supply and the second high-voltage mains supply, so that contacts of the first service auxiliary relay (1 SQ 1) 102-1 and the second service auxiliary relay (2 SQ 1) 202-1 at the front ends of the first main control opening circuit 411 and the second main control opening circuit 412 are closed (see fig. 8), and the first isolation break 1031 of the first main switch 11 is in a closing state, the second isolation break 2031 of the second main switch 21 is in a breaking state, the main control isolation break 303 and the main control moving contact 311 of the main control cabinet 3 are both in a closing state, at this time, the first high-voltage mains supply is normally supplied through the first incoming switch cabinet 1, and after the first switch board 1, the second switch board 2 and the first switch board 1-1, the second switch board (2 SA) 2-1 and the main switch board (SA 1) 3-1 are all set in the automatic gear and the controller (ZBC) 3-0 presses the reset button, i.e. the circuits at the front ends of the first main control switch circuit 411 and the second main control switch circuit 412 are electrified (see FIG. 8), the device enters the automatic switch function state of the first switch board 1 as the normal power supply, at this time, the second energy storage circuit 63 is powered (see FIG. 10), the energy storage motor circuit on the second main switch control circuit 21-1 on the second main switch 21 is powered, the second energy storage shaft 23 performs the rotation work of pre-stored energy, the second energy storage shaft 23 drives the second push plate 24 to rotate together in the process of energy storage rotation work, when the energy storage spring is compressed and quickly crosses zero, the second limit relay (2 SQ2 and 2SQ 3) 22 is triggered to act (see fig. 10), the corresponding normally closed contact is disconnected, the normally open contact is conducted, the circuit of the energy storage motor loop on the second main switch control circuit 21-1 is disconnected, and the second energy storage shaft 23 is stopped at the current position and is not moved due to the connection between the second manual operation mechanism 28 and the second energy storage shaft 23 and the connection between the worm and the worm wheel, so that the pre-energy storage working procedure of the second main switch 21 in the automatic switching state is completed. Referring to the circuit diagram of fig. 8, when the controller (ZBC) 3-0 detects that the first incoming switch cabinet 1 is powered off (that is, the first mains supply is powered off) and the incoming end of the standby power supply (the second incoming switch cabinet 2) is normally powered on, the controller (ZBC) 3-0 delays (is adjustable) to trigger the first switching-off contact 411-1 to perform a click action, so that the first main control switching-off circuit 411 is turned on, the contacts of the first intermediate relay (KAl) 411-2 are also changed due to the power supply of the coils, and simultaneously the first main control switching-off circuit 411 is locked to be in a conducting state, the main control trip switching-off coil (YT) 3-2 is powered on, so that the electromagnetic axis action enables the main control moving contact transmission shaft 39 to trip and release energy to rotate with the axis of the main control energy storage shaft 33, when the main control moving contact transmission shaft 39 rotates to the opening position, one side of the main control moving contact 311 moves away from the main control limit relay (SQ) 32 by the main control push plate 34 to enable the corresponding normally closed contact to be conducted, the normally open contact to be disconnected, the other side of the main control moving contact also drives the main control connecting rod 35 to rotate according to the supporting point and drives the main control rotary table 36 to rotate, the main control rotary table 36 rotates to enable the contact of the main control auxiliary relay (LW 1) 37 to act, the corresponding normally closed contact is conducted, the normally open contact is disconnected, simultaneously when the main control moving contact transmission shaft 39 rotates to the opening position, the energy storage motor loop on the vacuum circuit breaker control circuit 31-1 is reversely conducted to be electrified due to the action of the internally arranged limit contact of the vacuum circuit breaker 31, the main control energy storage shaft 33 performs reverse rotation, and the energy storage motor loop is cut off by the action of a limit contact built in the vacuum circuit breaker 31 after the main control energy storage shaft 33 is reset to the original dead point state of the opening position of the vacuum circuit breaker 31, so that the whole opening procedure of the main control cabinet 3 is completed. When the main control cabinet 3 controls the moving contact transmission shaft 39 to the opening position due to the triggering of the tripping action by the automatic switching instruction, the first switching-off circuit 51 on the first incoming line switch cabinet 1 is conducted and the first tripping switching-off coil (1 TQ) 1-2 is powered (see figure 9) due to the contact action of the main control auxiliary relay (LW 1) 37 triggered by the main control auxiliary relay (LW 1) and the contact action of the first intermediate relay (KAl) 411-2 on the first main control switching-off circuit 411, so that the electromagnetic core action enables the first moving contact transmission shaft 19 to trip and release energy to rotate by the axis of the first energy storage shaft 13, the first moving contact 111 is driven to move and separate the first static contact seat 112 to switch off, and when the first moving contact transmission shaft 19 rotates to the opening position, the first push plate 14 moves the first limiting relay (1 SQ2 and 1SQ 3) 12, the corresponding normally closed contact is conducted, the normally open contact is disconnected, the other surface drives the first connecting rod 15 to rotate according to a fulcrum and drives the first rotary table 16 to rotate, the rotation of the first rotary table 16 enables the contact of the first auxiliary relay (1F) 17 to act, the corresponding normally closed contact is conducted, the normally open contact is disconnected, meanwhile, when the first moving contact transmission shaft 19 rotates to a switching-off position, due to the action of the limiting contact arranged in the first main switch 11, the first main control switching-off circuit 411 and the first intermediate relay (KA 1) 411-2 thereof are in a continuous conduction state, the first switching-on reset circuit 52 is conducted and locked in a continuous conduction state (see figure 9), the energy storage motor loop on the first main switch control circuit 11-1 is reversely conducted to obtain electricity, the first energy storage shaft 13 performs reverse rotation motion, the energy storage motor loop is cut off by the action of the limiting contact arranged in the first main switch 11 after the first energy storage shaft 13 is reset to the original dead point state of the opening position of the first main switch 11, so that the whole opening procedure of the first incoming line switch cabinet 1 is completed; when the first closing return circuit 52 is turned on, the coil of the first delay relay (1 KT 1) 52-1 on the first closing return circuit 52 is powered on, the first delay relay (1 KT 1) 52-1 starts timing according to the set delay time, and then triggers the contact action conversion to turn off the normally closed contact and turn on the normally open contact, and the set delay time must ensure the time required for returning the first energy storage shaft 13 to the original dead point state of the opening position after the first main switch 11 is opened.
2. Electric action mechanism for automatically switching second incoming line switch cabinet 2 to switch on
After the first movable contact transmission shaft 19 on the first incoming line switch cabinet 1 automatically breaks the brake and rotates to the first movable contact 111 to break the brake to complete the contact changing action of the first auxiliary relay (1F) 17, the first switch-on safety circuit 71 (see fig. 11) is connected in series through the contact action of the first auxiliary relay (1F) 17 and the contact action of the main control auxiliary relay (LW 1) 37, then the first switch-on state signal circuit 71 transmits the information that the first isolation break 1031 of the first incoming line switch cabinet 1 and the main control movable contact of the main control cabinet 3 are broken to the controller (ZBC) 3-0, and after the controller (ZBC) 3-0 receives the information that the power supply is broken successfully, the second switch-on contact 64-1 point movable action (see fig. 10) on the second switch-on circuit 64 of the second high-voltage mains supply of the standby power supply and the main control switch-on contact 42-on circuit 42 on the main control cabinet 3 are triggered in a delayed (adjustable) mode, so that the second switch-on contact 64-on state and the main control switch-on circuit 42 are in a continuous switch-on state.
1) Because the second energy storage motor loop of the second main switch control circuit 21-1 is turned on by the second closing circuit 64 and is electrified again, the second energy storage motor drives the second energy storage shaft 23 to continuously do energy storage rotation work, when the second energy storage shaft 23 rotates to compress the energy storage spring to zero-crossing, the energy release trigger drives the second moving contact transmission shaft 29 to rotate by taking the axis of the second energy storage shaft 23 as the axis, the second moving contact transmission shaft 29 rotates to drive the second isolating fracture moving contact 211 to move towards the second isolating fracture static contact seat 212 until the second isolating fracture moving contact seat contacts are closed, closing action is completed, and when the second moving contact transmission shaft 29 rotates, the energy released by the second energy storage shaft 23 also simultaneously does compression energy storage work for the second isolating fracture moving contact 211 to be separated and the second isolating fracture energy spring required by the separating motion, and when the second isolating fracture moving contact 211 and the second isolating fracture static contact seat 212 are closed, the second moving contact transmission shaft 29 is just stopped by the locking device in a state of being locked by the second isolating brake energy spring of the locking device; in the process that the second energy storage shaft 23 continues to do energy storage rotation work until the second movable contact transmission shaft 29 completes closing movement, the normally closed contact of the second limit relay (2 SQ2 and 2SQ 3) 12 continues to be in an off state, and the normally open contact continues to be in an on state; after the second moving contact transmission shaft 29 rotates to enable the second moving contact 211 to be closed with the second static contact base 212, the second moving contact transmission shaft 29 rotates to drive the second connecting rod 25 to rotate according to the pivot and drive the second rotary table 26 to rotate, the second rotary table 26 rotates to enable the contact of the second auxiliary relay (2F) 17 to act, the corresponding normally closed contact is opened, and the normally open contact is closed.
2) Also, because the main control energy storage motor loop of the vacuum circuit breaker control circuit 31-1 is electrically conducted by the main control closing circuit 42, the main control energy storage motor drives the main control energy storage shaft 33 to do energy storage rotation work, the main control energy storage shaft 33 rotates to compress the energy storage spring until the energy storage spring is released after zero crossing, the main control moving contact transmission shaft 39 is driven to rotate by taking the axis of the main control energy storage shaft 33 as the axis, the main control moving contact transmission shaft 39 rotates to drive the main control moving contact 311 to move towards the main control static contact seat 312 until the attraction contact is completed, closing action is completed, and when the main control moving contact transmission shaft 39 rotates, the energy released by the main control energy storage shaft 33 also simultaneously compresses energy storage work for the main control opening energy spring required by the main control moving contact 311 to separate movement, and when the main control moving contact 311 and the main control static contact seat 312 are closed, the main control moving contact transmission shaft 39 is just stopped by the locking device, and the main control moving contact transmission shaft 39 is stopped in a state of being locked by the main control opening energy spring of the locking device; when the main control energy storage shaft 33 rotates to a fast zero crossing position, the main control push plate 34 driven by the main control energy storage shaft 33 together triggers the main control limit relay (SQ) 32 to act so as to enable the corresponding normally-closed contact to be disconnected, and the normally-open contact is conducted until the main control energy storage shaft 33 continues to rotate so as to enable the energy storage spring to drive the main control movable contact transmission shaft 39 to rotate after zero crossing so as to enable the main control movable contact 311 to be closed with the main control static contact seat 312, and then the normally-closed contact of the main control limit relay (SQ) 32 continues to be in an off state and the normally-open contact continues to be in a conducting state; after the main control movable contact 311 and the main control static contact seat 312 are closed due to the rotation of the main control movable contact transmission shaft 39, the main control movable contact transmission shaft 39 rotates to drive the main control connecting rod 35 to rotate according to the pivot and drive the main control rotary table 36 to rotate, and the main control rotary table 36 rotates to enable the contacts of the main control auxiliary relay (LW 1) 37 to act, and the corresponding normally closed contacts are opened and normally open contacts are closed.
3) When the second incoming line switch cabinet 2 and the main control cabinet 3 are in a closed state, after the second auxiliary relay (2F) 27 and the main control auxiliary relay (LW 1) 37 are in contact action, the second safety circuit 72 (see figure 11) is connected in series through the contact action of the second auxiliary relay (2F) 27 and the contact action of the main control auxiliary relay (LW 1) 37, then the second switch state signal circuit 72 transmits the closed information of the second isolation fracture 2031 of the second incoming line switch cabinet 2 and the main control moving contact of the main control cabinet 3 to the controller (ZBC) 3-0, after the controller (ZBC) 3-0 receives the closed successful information of the second incoming line switch cabinet of the standby power supply, the current status information of the automatic switching success is displayed, after time delay, the next switch enters the switch state, and when the switch condition is mature, the triggered action is detected again. On the contrary, the second incoming line switch cabinet 2 is used as a high-voltage power supply, and the first incoming line switch cabinet 1 is used as a spare high-voltage power supply, so that the action principle of automatic switching is the same.
3. Mechanism of electric action for mutual locking function between automatic switching functions
1) When the controller (ZBC) 3-0 triggers the automatic closing program of the first closing contact 54-1 or the second closing contact 64-1 and the master closing contact 42-1 after the first incoming line switch cabinet 1 or the second incoming line switch cabinet 2 and the master control switch cabinet 3 simultaneously execute closing according to the designed program requirement, because the first main switch 11 or the second main switch 21 on the first incoming line switch cabinet 1 or the second incoming line switch cabinet 2 is closed before the vacuum circuit breaker 31 when the automatic switching device enters the automatic switching function state, the automatic pre-storing work of the first manual operation mechanism 18 or the second manual operation mechanism 28 and the electric operation mechanism 28 is completed, although the closing completion time of the vacuum circuit breaker 31 is shorter than or equal to 5s, the closing completion time of the first main switch 11 or the second main switch 21 is shorter than or equal to 2s through the action of the automatic pre-storing function under the automatic switching energy state, so that the task of the on-load function is opened and closed by the vacuum circuit breaker 31, that is that the first main switch 11 or the second main switch 21 is not burnt by the static contact, and the static contact is not burnt by the vacuum circuit breaker 11 or the static contact.
2) After the first main switch 11 or the second main switch 21 completes the reset of the first energy storage shaft 13 or the second energy storage shaft 23 after automatic switching-off, after the first delay relay (1 KT 1) 52-1 or the second delay relay (2 KT 1) 62-1 acts, the locking function of the first switching-off reset circuit 52 or the second switching-off reset circuit 62 (see fig. 9 and fig. 10) and the first main control switching-off circuit 411 or the second main control switching-off circuit 412 is released, so that the circuits of the first switching-off reset circuit 52 or the second switching-off reset circuit 62 and the first main control switching-off circuit 411 or the second main control switching-off circuit 412 are restored to the original state without electricity, and the first energy storage circuit 53 or the second energy storage circuit 63 is conducted (see fig. 9 and fig. 10) because the first energy storage circuit 53 is conducted according to the same principle as the second main switch 21 which performs automatic pre-energy storage operation, the energy storage motor loop on the first main switch control circuit 11-1 on the first main switch 11 is powered, the first energy storage shaft 13 performs the rotation work of pre-energy storage, the first energy storage shaft 13 drives the first push plate 14 to rotate together in the process of performing the rotation work of energy storage, when the energy storage spring is compressed and quickly crosses zero, the first limit relay (1 SQ2 and 1SQ 3) 12 is triggered to act (see figure 9) so that the corresponding normally closed contact is disconnected, the normally open contact is conducted so as to disconnect the circuit of the energy storage motor loop on the first main switch control circuit 11-1, and the first energy storage shaft 13 is stopped at the current position by the connection relation of the worm and the worm wheel due to the connection between the first manual operation and electric operation mechanism 18 and the first energy storage shaft 13, the pre-stored energy operation of the first main switch 11 in the automatic switching state is completed.
3) When the controller (ZBC) 3-0 triggers the first switch contact 411-1 or the second switch contact 412-1 to perform a click action according to the set program characteristic requirement, the contacts of the first intermediate relay (KA 1) 411-2 or the second intermediate relay (KA 2) 412-2 are also transformed due to the power supply of the coils thereof, and simultaneously the first master switch circuit 411 or the second master switch circuit 412 is locked, and the electrically conducted power supply does not flow into the second master switch circuit 412 or the circuit of the first master switch circuit 411 when the first master switch circuit 411 or the second master switch circuit 412 is powered (see fig. 8); one side of the electromagnetic shaft core action after the master control trip brake-separating coil 3-2 (YT) is electrified, so that the master control movable contact 311 performs brake-separating action (see figure 8); one face ensures that only in the state that the main control moving contact 311 is switched off after the first main control switching circuit 411 or the second main control switching circuit 412 is powered on in the automatic switching state, the first switching circuit 51 or the second switching circuit 61 is conducted, and then the first isolation fracture 1031 or the second isolation fracture 2031 is linked (see fig. 8, 9 and 10); one surface also ensures that the first brake separating and resetting circuit 52 or the second brake separating and resetting circuit 62 only allows the first energy storage shaft 13 or the second energy storage shaft 23 to finish resetting actions after the main control movable contact 311 finishes brake separating actions and the first isolation fracture 1031 or the second isolation fracture 2031 also finishes brake separating and can be powered on (see fig. 9 and 10); the vacuum circuit breaker local electric operating circuit 31-2 is disconnected with the first main control opening circuit 411 or the second main control opening circuit 412 and the main control trip opening coil (YT) 3-2 thereof after the first main control opening circuit 411 or the second main control opening circuit 412 is powered on, so that the phenomenon that the circuit is charged due to misoperation when an automatic switching device automatically switches is avoided, and the phenomenon that current is charged into an opening circuit of an automatic switching function when the automatic switching device automatically operates opening is also avoided, (see fig. 8); the first energy storage circuit 53 or the second energy storage circuit 63 can be enabled to complete the pre-energy storage action of the first main switch 11 or the second main switch 21 only after the first energy storage shaft 13 or the second energy storage shaft 23 is completed to perform the reset action and after the first delay relay (1 KT 1) 52-1 or the second delay relay (2 KT 1) 62-1 contact delay action is powered off under the condition of fully having the automatic switching or during the self-cutting switching action, and the first main switch 11 or the second main switch 21 can be enabled to lock and cut off the power supply of the main control trip breaking coil (YT) during the automatic pre-energy storage action (see fig. 8, 9 and 10).
4) The locking function of the intermediate relay adopted by the first switching-off reset circuit 52 and the second switching-off reset circuit 62 also ensures that an in-situ power supply is not charged into the first switching-off reset circuit 52 and the second switching-off reset circuit 62 when in-situ power operation, so that accident phenomenon caused by misoperation during in-situ power operation is avoided; the first switch-off reset circuit 52 or the second switch-off reset circuit 62 automatically latches and cuts off the motor circuit of the first main switch 11 or the second main switch 21 during the reset operation for realizing the automatic switching function (see fig. 9 and 10).
5) When the first overhaul break 102 or the second overhaul break 202 of the first wire-incoming switch cabinet 1 and the second wire-incoming switch cabinet 2 are in an open state or the protection fuse on the main control cabinet 3 causes tripping action of the vacuum circuit breaker 31 or the first transfer switch 1-1 or the second transfer switch 2-1 or the main control transfer switch 3-1 is transferred to a local gear or a far-throw gear due to overload and short-circuit current, the controller (ZBC) 3-0 automatically withdraws from the automatic switching work and displays related locking information (see the automatic switching function locking circuit 73 in fig. 11).
6) The voltage information collected by the controller (ZBC) 3-0 at the incoming cable ends of the first incoming switch cabinet 1 and the second incoming switch cabinet 2 may have two options of voltage and charger contact, see the first charger contact information circuit 74 and the second charger contact information circuit 75 of fig. 11, and the first PT voltage information circuit 81 and the second PT voltage information circuit 82 of fig. 12.
3. Automatic switching action mechanism brief description of intelligent high-voltage dual-power automatic switching device
The automatic switching action mechanism of the intelligent high-voltage dual-power automatic switching device is as follows: the automatic switching action is completed by firstly opening the main control movable contact 311 of the main control cabinet 3, opening the isolation fracture (1031 or 2031) on the power supply incoming line cabinet, closing the isolation fracture (2031 or 1031) on the standby power supply incoming line cabinet, closing the main control movable contact 311 of the main control cabinet 3.
4. Time profile for completing automatic switching action of intelligent high-voltage dual-power automatic switching device
According to the characteristic performance of the main electrical equipment selected by the intelligent high-voltage dual-power automatic switching device, the required action time in the automatic switching process is briefly described as follows:
the intrinsic closing time of the first main switch 11 and the second main switch 21 of the first incoming line switch cabinet 1 and the second incoming line switch cabinet 2 is about 15s, the intrinsic opening time is about 0.1s, and the energy storage shaft reset time after the intrinsic opening is about 13s; the vacuum circuit breaker of the main control cabinet 3 has an inherent closing time of about 4.5s, an inherent opening time of about 0.1s and an energy storage shaft resetting time of about 4s after the inherent opening when the vacuum circuit breaker is used, and has an inherent closing time of about 0.1s, an inherent opening time of about 0.1s, an inherent reclosing time delay time of 0.3s and an inherent energy storage shaft action time of about 7s when the vacuum circuit breaker is used; according to the first main switch 11 and the second main switch 21, the time required for the first energy storage shaft 13 and the second energy storage shaft 23 to rotate to the time when the energy storage spring is pressed to the zero point is about 14.5s during the closing operation, therefore, the pre-energy storage operation time of the first main switch 11 or the second main switch 21 is set to be 13s, that is, when the first main switch 11 or the second main switch 21 performs the pre-energy storage operation in the automatic switching state, the first limit relay (1 SQ2 and 1SQ 3) 12 or the second limit relay (2 SQ2 and 2SQ 3) 12 is triggered when the first energy storage shaft 13 or the second energy storage shaft 23 rotates for about 13s, and therefore, the closing time of the first main switch 11 or the second main switch 21 in the automatic switching state is about 2s. Therefore, the controller 3-0 sets the delay action value for triggering the first opening contact 411-1 to be equal to or greater than 0s (e.g., 0.5 s), if a vacuum switch is adopted as a vacuum circuit breaker of the main control cabinet 3, sets the delay action value for triggering the first closing contact 54-1 and the second closing contact 64-1 to be equal to or greater than 4.5s (e.g., 4.5 s), if a circuit breaker is adopted, sets the delay action value for triggering the first closing contact 54-1 and the second closing contact 64-1 to be equal to or greater than 0.3s (e.g., 0.5 s), and sets the delay action setting time of the first delay relay (1 KT 1) 52-1 and the second delay relay (2 KT 1) 62-1 to be 14s. If the vacuum switch is adopted as the vacuum breaker of the main control cabinet 3, the completion time of the automatic switching action is 0.5s+0.1s+o.1s+4.5s+4.5s=9.7 s, and the minimum can be satisfied to 0s+0.1s+0.1s+4.5s+4.5s=9.2 s; if the circuit breaking is adopted as the vacuum circuit breaker of the main control cabinet 3, the completion time of the automatic switching operation is 0.5s+0.1s+0.1s+0.5s+2+0.1s=3.3 s, and the minimum can be up to 0s+0.1s+0.1s+0.3s+2+0.1s=2.6 s.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (5)
1. The utility model provides an intelligent high-voltage dual-power automatic switching control equipment, is including the first inlet wire switch cabinet that is connected with first high-voltage commercial power, be connected with the second inlet wire switch cabinet of second high-voltage commercial power and the master control cabinet of connection consumer, when first inlet wire switch cabinet switched on first high-voltage commercial power, second inlet wire switch cabinet then breaks off with the second high-voltage commercial power, first inlet wire switch cabinet includes first main switch, and first main switch includes first moving contact, first static contact and drives the first energy storage axle of first moving contact divide-shut brake, second inlet wire switch cabinet includes the second main switch, and the second main switch includes second moving contact, second static contact and drives the second energy storage axle of second moving contact divide-shut brake, the master control cabinet includes vacuum circuit breaker, and vacuum circuit breaker includes vacuum moving contact, the static contact and drives the master control energy storage axle of vacuum moving contact divide-shut brake, its characterized in that still includes control first main switch, second main switch and vacuum circuit breaker divide-shut brake, control circuit includes:
The main control switching-off circuit comprises a first main control switching-off circuit, when a controller on a main control cabinet receives signals of voltage loss or undervoltage or undercurrent of a first high-voltage commercial power and normal power of a second high-voltage commercial power, the controller triggers a first switching-off contact point to conduct in a click mode and switch on a contact action of a first switching-off relay of the first main control switching-off circuit to lock, so that the first main control switching-off circuit is in a conducting state continuously, a main control tripping switching-off coil is electrified, a main control moving contact transmission shaft tripping action is promoted to enable a vacuum moving contact to switch off, and then a first switching-off signal is sent to the first switching-off circuit and a main control switching-off state signal is sent to a first switching-on safety circuit;
the first switching-off circuit is used for receiving a first switching-off signal sent by the first main control switching-off circuit and triggering a first trip switching-off coil to act, so that a first moving contact transmission shaft is caused to trip to enable the first moving contact to switch off, then a first switching-off state signal is sent to the first switching-on safety circuit, and then the controller receives the main control switching-off state signal and the first switching-off state signal, then sends a second switching-on signal to the second switching-on circuit and sends a main control switching-on signal to the main control switching-on circuit;
The second switching-on circuit is used for receiving the second switching-on signal, triggering the second motor to drive the second energy storage shaft to rotate and enabling the second movable contact to be switched on with the second static contact seat;
the main control switching-on circuit is used for receiving the main control switching-on signal and triggering the main control motor to drive the main control energy storage shaft to rotate so as to switch on the vacuum movable contact and the vacuum static contact seat;
the first energy storage circuit is used for controlling the first energy storage shaft to continuously rotate towards a closing state and controlling the first energy storage shaft to stop at the closing state; the first energy storage circuit comprises a normally closed contact of a first switching-off relay, when a first delay relay of a first reset circuit is electrified and after delay action, the first switching-off relay arranged in the first reset circuit loses electricity, when the first switching-off relay loses electricity, the normally closed contact of the first switching-off relay in the first energy storage circuit is closed to switch on the first energy storage circuit so as to drive the first energy storage shaft to rotate in a closing direction and touch a first limit relay when the first energy storage shaft is in a closing state, and the action of the first limit relay enables the first limit normally closed contact connected in series in the first energy storage circuit to be disconnected and enables the first energy storage shaft to stop rotating and stop in the closing state;
The first reset circuit is used for delaying the opening time of the main control opening circuit and sending a starting signal of the first energy storage circuit after the delay time is triggered, the first reset circuit comprises a first opening relay normally-open contact and a first auxiliary relay normally-closed contact which are mutually connected in series, the first opening relay normally-open contact is closed when the first main control opening circuit is conducted and the first opening relay coil is electrified, the first auxiliary relay normally-closed contact is closed after the first movable contact transmission shaft completes opening action, when the first opening relay normally-open contact and the first auxiliary relay normally-closed contact are both closed, the first delay relay is electrified and timed, and the first delay relay normally-closed contact is connected in series in the first reset circuit and the main control opening circuit.
2. The intelligent high-voltage dual-power automatic switching device according to claim 1, wherein the master control switching-off circuit comprises a first switching-off contact, a second switching-off contact, a first master control switching-off circuit and a second master control switching-off circuit controlled by a controller; the controller sends an automatic switching brake-separating action command when receiving signals of voltage loss or under-voltage or under-current of the power supply and normal electricity of the standby power supply, and triggers the first brake-separating contact or the second brake-separating contact to conduct in a point-to-point mode; the first main control brake separating circuit and the second main control brake separating circuit trigger the contact action of the first brake separating relay or the second brake separating relay and lock the self circuit after the first main control brake separating circuit or the second main control brake separating circuit receives the first brake separating contact or the second brake separating contact point-acting power supply, so that the self circuit is in a conducting state continuously, and triggers the main control trip brake separating coil action, and the main control moving contact transmission shaft tripping action is promoted to cause the vacuum moving contact brake separating.
3. The intelligent high-voltage dual-power automatic switching device according to claim 2, wherein the first switching-off circuit comprises a normally open contact of a first switching-off relay for receiving the first switching-off signal, and when the normally open contact of the first switching-off relay is closed after receiving the first switching-off signal, the first trip switching-off coil is actuated to cause the first moving contact transmission shaft to trip, the first moving contact is caused to switch off, the first limit relay is triggered to actuate in the switching-off process, and the first limit relay sends a first switching-off state signal to the first switching-on safety circuit after switching off of the first moving contact transmission shaft.
4. The intelligent high-voltage dual-power automatic switching device according to claim 3, wherein the second switching-on circuit comprises a second switching-on contact for receiving the second switching-on signal, the second switching-on contact is closed after receiving the second switching-on signal, and the second energy storage shaft is driven to rotate to drive the second moving contact to switch on with the second static contact seat, and the second auxiliary relay is triggered after switching-on, and the second auxiliary relay triggers the normally closed contact of the second auxiliary relay connected in series in the second switching-on circuit to be opened after switching-on, so that the continuous rotation of the second energy storage shaft is stopped.
5. The intelligent high-voltage dual-power automatic switching device according to claim 4, wherein the main control switching-on circuit comprises a third switching-on contact which is used for receiving a main control switching-on signal and is controlled by the controller, when the main control switching-on signal is received, the third switching-on contact is closed and drives the main control energy storage shaft to rotate so that the vacuum movable contact and the vacuum static contact are switched on, the main control auxiliary relay is triggered in the switching-on process, and the main control auxiliary relay triggers the normally closed contact of the main control auxiliary relay connected in series in the main control switching-on circuit to be opened after switching-on, so that the continuous rotation of the main control energy storage shaft is stopped.
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