CN112736930A - Power grid monitoring system applied to reactive power compensation device - Google Patents
Power grid monitoring system applied to reactive power compensation device Download PDFInfo
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- CN112736930A CN112736930A CN202011507419.8A CN202011507419A CN112736930A CN 112736930 A CN112736930 A CN 112736930A CN 202011507419 A CN202011507419 A CN 202011507419A CN 112736930 A CN112736930 A CN 112736930A
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- reactive power
- control module
- tail pipe
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/03—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations
- H01R11/09—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations the connecting locations being identical
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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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
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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
- Y02E40/30—Reactive power compensation
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a power grid monitoring system applied to a reactive power compensation device, which comprises: the circuit monitoring unit comprises a control module, and a voltage measurement conversion circuit, a current measurement conversion circuit and a power factor monitoring circuit which are connected to the control module; the reactive compensation device comprises an air switch, a fuse, a compound switch and a capacitor; the circuit monitoring unit controls the switching of the capacitor through the compound switch, the air switch controls the power supply and the overcurrent protection of the whole reactive power compensation device, and the fuse is matched with the air switch; and the driving unit is connected between the control module of the line monitoring unit and the compound switch of the reactive power compensation device. The invention solves the defects of switching oscillation during light load and insufficient compensation during heavy load, and simultaneously, the device reduces power loss and improves voltage quality.
Description
Technical Field
The invention belongs to the technical field of reactive compensation, and particularly relates to a power grid monitoring system applied to a reactive compensation device.
Background
At present, the increase of the explosive number of household appliances leads to the increase of reactive power consumption in a low-voltage power grid, and the power supply quality of the power grid is reduced because the power factor of most power electronic devices is low; therefore, reactive compensation is often used to solve this problem. The principle of reactive compensation is as follows: connecting the device with capacitive load and inductive load in parallel in the same circuit, when the capacitive load releases energy, the inductive load absorbs energy; when an inductive load releases energy, the capacitive load absorbs the energy, and the energy is exchanged between the two loads.
The existing devices commonly used for reactive compensation mainly have the following defects: one is to use the ac contactor as the switching switch, the speed is slow, the change of the load reactive power can not be tracked quickly, and the serious impact surge and the operation overvoltage can be caused when the capacitor is switched, so that the contact of the ac contactor is burnt or the interior of the compensation capacitor is broken down, and the service life of the reactive power compensation device is seriously influenced; the other is that the device takes a power factor as a detection amount and a control target in a control mode, the final aim of compensation is to reduce the reactive power of the power grid, the reactive power is determined by voltage, current and phase, the power factor sampling mode only detects the phase difference in the power grid and cannot accurately reflect the reactive component size of the load in the power grid, the full compensation cannot be achieved in heavy load, the switching oscillation is easy in light load, the reliability and the service life of a control system are influenced, and the safe operation of the power grid and user equipment is also influenced. Therefore, a low-voltage reactive power compensation device is needed, which can improve both power factor and voltage quality, avoid the problem of reciprocating switching of the reactive power compensation device, and solve the defect of insufficient compensation caused by switching oscillation.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a be applied to reactive power compensator's electric wire netting monitored control system, make it can not only give consideration to improving power factor and improving voltage quality to can avoid reactive power compensator device switching problem to reciprocate.
The technical scheme of the invention is as follows:
a power grid monitoring system applied to a reactive power compensation device comprises: the circuit monitoring unit comprises a control module, and a voltage measurement conversion circuit, a current measurement conversion circuit and a power factor monitoring circuit which are connected to the control module; the voltage measurement conversion circuit and the current measurement conversion circuit transmit the collected power grid data to the control module; the reactive compensation device comprises an air switch, a fuse, a compound switch and a capacitor; the circuit monitoring unit controls the switching of the capacitor through the compound switch, the air switch controls the power supply and the overcurrent protection of the whole reactive power compensation device, and the fuse is matched with the air switch; and the driving unit is connected between the control module of the line monitoring unit and the compound switch of the reactive power compensation device.
As a preferred embodiment of the grid monitoring system applied to the reactive power compensation device, the system of the present invention includes: the voltage measurement conversion circuit and the current measurement conversion circuit are connected to a power grid and used for monitoring voltage and current signals in the power grid; and the voltage measurement conversion circuit and the current measurement conversion circuit transmit voltage and current signals to the control module through the analog-to-digital converter.
As a preferred embodiment of the grid monitoring system applied to the reactive power compensation device, the system of the present invention includes: the driving unit comprises a trigger plate and a plurality of pulse driving circuits which are arranged on the trigger plate and correspond to the compound switches; and the control module is connected with the corresponding compound switches one by one through each pulse driving circuit.
As a preferred embodiment of the grid monitoring system applied to the reactive power compensation device, the system of the present invention includes: the compound switch is composed of a diode and a thyristor which are connected in anti-parallel.
As a preferred embodiment of the grid monitoring system applied to the reactive power compensation device, the system of the present invention includes: the capacitor is a three-phase self-healing parallel capacitor.
As a preferred embodiment of the grid monitoring system applied to the reactive power compensation device, the system of the present invention includes: the circuit monitoring unit also comprises a display module; the display module is connected with the control module and can display real-time data of the whole reactive compensation device and voltage and current signals in a power grid under the instruction of the control module.
As a preferred embodiment of the grid monitoring system applied to the reactive power compensation device, the system of the present invention includes: the line monitoring unit also comprises a wireless transceiving module and a server in wireless connection with the wireless transceiving module; the wireless transceiver module is connected with the control module and can be wirelessly connected with the intelligent terminal through the server; the control module can send the acquired data information to the server for storage in real time through the wireless transceiving module, and can access or download the data information through the intelligent terminal; the intelligent terminal can also send an instruction signal to the server, and the instruction signal is sent to the control module through the server, and the control module can control the work of each module except the control module in the line monitoring unit according to the instruction signal.
As a preferred embodiment of the grid monitoring system applied to the reactive power compensation device, the system of the present invention includes: the circuit monitoring unit, the reactive power compensation device and the driving unit are integrated into a whole respectively, three mutually independent modular devices are formed respectively, and a circuit connected among the circuit monitoring unit, the reactive power compensation device and the driving unit is in a detachable two-section type and comprises a first electric wire and a second electric wire; the tail end of the first electric wire forms a pair of first wire core ends; the tail end of the second wire forms a pair of second wire core ends; the second wire and the second wire core end head are connected through a wiring device.
As a preferred embodiment of the grid monitoring system applied to the reactive power compensation device, the system of the present invention includes: the wiring device comprises a first tail pipe, a second tail pipe, a connecting sleeve connected between the first tail pipe and the second tail pipe, and an electric connection assembly arranged on the butt joint end of the first tail pipe; the power connection assembly comprises an insulation distribution board positioned in the middle, and a first conductor and a second conductor which are symmetrically fixed on two sides of the insulation distribution board; the first wire can penetrate through the tail end of the first tail pipe, a pair of first core ends at the tail end of the first wire are branched by the insulation distribution plate to form two paths, and the two paths of first core ends are respectively in one-to-one corresponding contact with the first conductor and the second conductor under the guidance of two side surfaces of the insulation distribution plate; the second wire can penetrate through the tail end of the second tail pipe, a pair of second wire core end heads at the tail ends of the second wire can be branched by the insulation distributing plate to form two paths, and the two paths of second wire core end heads are respectively in one-to-one corresponding contact with the first conductor and the second conductor under the guidance of two side faces of the insulation distributing plate.
As a preferred embodiment of the grid monitoring system applied to the reactive power compensation device, the system of the present invention includes: the outer side wall of the butt joint end of the first tail pipe is provided with an external thread; a circle of first limiting ring is arranged on the periphery of the butt joint end of the second tail pipe; one end of the connecting sleeve is provided with a second limiting ring matched with the first limiting ring, and the inner side wall of the other end of the connecting sleeve is provided with an internal thread matched with the external thread; the connecting sleeve is hooked on the outer side face of the first limiting ring through the second limiting ring of the connecting sleeve and is rotatably connected to the external thread section of the first tail pipe through the internal thread of the connecting sleeve.
As a preferred embodiment of the grid monitoring system applied to the reactive power compensation device, the system of the present invention includes: the internal channels at the tail ends of the first tail pipe and the second tail pipe are respectively provided with a corresponding sealing block; the sealing block is matched with the inner side walls of the first tail pipe and the second tail pipe, and a through hole matched with the outer diameter of the first bobbin end head is formed in the sealing block; variable grooves are distributed at the tail ends of the first tail pipe and the second tail pipe along the circumferential direction; and the tail ends of the first tail pipe and the second tail pipe are both connected with tightening sleeves covering the periphery of the deformation groove.
The invention has the beneficial effects that:
the power grid monitoring system applied to the reactive power compensation device effectively solves the problem in a control mode that a power factor is used as a switching criterion, solves the defect of switching oscillation during light load, overcomes the defect of insufficient compensation during heavy load, and simultaneously reduces power loss and improves voltage quality.
And secondly, the switching compound switch of the reactive power compensation device adopts an independent pulse trigger device, so that the thyristor is triggered when the voltages at two ends are zero, the switching of the capacitor bank without a transition process is realized, and the switching compound switch is simple and reliable.
The reactive power of the reactive power compensation device is quickly and accurately compensated, the device solves the switching problem in the reactive power compensation process, the service life of the device is ensured, the cost is reduced, and the device has better practical value.
Drawings
Fig. 1 is a topological diagram of a power grid monitoring system applied to a reactive power compensation device according to a first embodiment.
Fig. 2 is a topological diagram of a power grid monitoring system applied to a reactive power compensation device according to a second embodiment.
Fig. 3 is a topological diagram of a power grid monitoring system applied to a reactive power compensation device according to a third embodiment.
Fig. 4 is a schematic view of the connections between the various modular devices.
Fig. 5 is a schematic view of the connection between the respective modular devices by the wiring device of the present invention.
Fig. 6 is a front view of the wiring device and a sectional view thereof taken along the direction a-a.
Fig. 7 is an internal configuration diagram of the wiring device.
Fig. 8 is an exploded view of the wiring lug.
Detailed Description
Referring to fig. 1, an embodiment of the present invention provides a power grid monitoring system applied to a reactive power compensation device, which includes a modular line monitoring unit 100, a reactive power compensation device 200, and a driving unit 300.
The line monitoring unit 100 has the functions of reactive switching judgment and electric quantity parameter calculation as a controller of the reactive power compensation device 200.
The line monitoring unit 100 includes a control module 101 and a plurality of detection circuits connected to the control module 101, wherein the detection circuits include a voltage measurement conversion circuit 102, a current measurement conversion circuit 103 and a power factor monitoring circuit 104.
The voltage measurement transformation circuit 102 and the current measurement transformation circuit 103 are connected to the grid for monitoring voltage current signals in the grid.
Each detection circuit is capable of data interaction with the control module 101. The voltage measurement converter circuit 102 and the current measurement converter circuit 103 can transmit the collected grid data to the control module 101. The control module 101 is a single chip microcomputer.
The reactive power compensation device 200 of the present invention may adopt a reactive power compensation device in the prior art, which includes an air switch 201, a fuse 202, a compound switch 203 and a capacitor 204; the line monitoring unit 100 controls the switching of the capacitor 204 through the compound switch 203, the air switch 201 controls the power supply and the over-current protection of the whole reactive power compensation device 200, and the fuse 202 is matched with the air switch 201. The compound switch 203 is composed of a diode and a thyristor in anti-parallel.
As shown in fig. 1, A, B, C three-phase power line enters the reactive power compensation device 200 through the air switch 201, and then is connected with the compound switch 203 through the fuse 202, the capacitor 204 is connected with the fuse 202 and the air switch 201 through the compound switch 203, and then the lightning arrester is connected with the air switch 201 and the three-phase power line, and then is grounded.
The driving unit 300 is connected between the control module 101 of the line monitoring unit 100 and the compound switch 203 of the reactive power compensation device 200; the driving unit 300 can receive a switching signal from the control module 101, and drive the compound switch 203 according to the switching signal, so that the compound switch 203 controls the capacitor 204 to perform a corresponding switching action.
Specifically, the driving unit 300 includes a trigger board 301 and a plurality of pulse driving circuits 302 disposed on the trigger board 301 and corresponding to the respective composite switches 203, and the pulse driving circuits 302 are control driving circuits of thyristors of the composite switches 203.
The control module 101 is connected with each corresponding combination switch 203 one by one through each pulse driving circuit 302, and the trigger board 301 can convert the switching signal of the control module 101 into a high-frequency pulse signal.
Further, the voltage measurement conversion circuit 102 and the current measurement conversion circuit 103 transmit the voltage and current signals to the control module 101 through the analog-to-digital converter 105.
Further, the capacitor 204 is a three-phase self-healing parallel capacitor.
Based on the above, the operation principle of the power grid monitoring system applied to the reactive power compensation device of the invention is as follows: the method comprises the steps that line data of a power grid are monitored in real time through a plurality of detection circuits connected to a control module 101, sampling signals such as voltage and current collected from the line are sent to the control module 101 to be analyzed and processed, reactive power lacking in the line is calculated, and the control module 101 judges whether to switch a capacitor 204 according to the calculated reactive power data and a preset control strategy; when the capacitor 204 needs to be switched, the control module 101 controls the switched capacitor 204 through the compound switch 203 formed by the thyristor and the diode in anti-parallel connection according to the judgment result.
The power grid monitoring system applied to the reactive power compensation device effectively overcomes the problem in a control mode that a power factor is used as a switching criterion, solves the defect of switching oscillation during light load, overcomes the defect of insufficient compensation during heavy load, and simultaneously gives consideration to reduction of power loss and improvement of voltage quality.
The switching combination switch of the reactive power compensation device adopts an independent pulse trigger device, ensures that the thyristor is triggered when the voltage at two ends is zero, realizes the switching of the capacitor bank without a transition process, and is simple and reliable.
The reactive power of the reactive power compensation device is quickly and accurately compensated, the device solves the switching problem in the reactive power compensation process, the service life of the device is ensured, the cost is reduced, and the device has better practical value.
Further, as shown in fig. 2, the line monitoring unit 100 of the present invention further includes a display module 106.
The display module 106 adopts an LED display circuit, and is configured to support an LED display screen to display real-time data of the whole reactive power compensation device.
Specifically, the display module 106 is connected to the control module 101, and is capable of displaying real-time data of the whole reactive power compensation device 200 and the voltage and current signals in the power grid under the instruction of the control module 101.
In order to further enhance the interaction between the power grid monitoring system and external information, the control module 101 is further provided with a communication interface circuit and a keyboard interface circuit; the communication interface circuit is used for supporting the line monitoring unit 100 to perform data information communication interaction; is connected with an external keyboard through a keyboard interface circuit.
Further, as shown in fig. 3, the line monitoring unit 100 further includes a wireless transceiver module 107 and a server 108 wirelessly connected thereto.
The wireless transceiver module 207 may adopt an existing wireless communication module (such as 485 communication), and is connected with the control module 101, and the wireless transceiver module 107 can be wirelessly connected with the intelligent terminal 400 through the server 108; the control module 101 can send the acquired data information (data detected by each detection circuit, the result of data analysis processing performed by the control module 101, and the switching operation information … … of the capacitor 204) to the server 108 through the wireless transceiver module 107 for storage in real time, and can access or download the data information through the intelligent terminal 400.
The intelligent terminal 400 can also send an instruction signal to the server 108, and send the instruction signal to the control module 101 through the server 108, and the control module 101 can control the operations of the other modules in the line monitoring unit 100 except the control module 101 according to the instruction signal, so that remote control can be realized. The intelligent terminal 400 may be a remote computer, a smart phone, a tablet computer, or other intelligent communication devices.
Further, as shown in fig. 4, the line monitoring unit 100, the reactive power compensation device 200 and the driving unit 300 are integrated into a whole, and form three independent modular devices. Therefore, the line connected between the three (e.g., between the line monitoring unit 100 and the reactive power compensation device 200, or between the line monitoring unit 100 and the driving unit 300, or between the reactive power compensation device 200 and the driving unit 300) is a detachable two-segment type including a first electric wire X-1 on one modular device and a second electric wire X-2 on another modular device to be connected (e.g., the line connected between the control module 101 and the trigger plate 301 is formed as a detachable two-segment type, in which one end is extended outward by the control module 101 and the other end is extended outward by the trigger plate 301).
As shown in fig. 5, the ends of the first electric wire X-1 form a pair of first core terminals X-11; the ends of the second electric wires X-2 form a pair of second core terminals X-21; the second wire X-2 is connected with the second wire core end head X-21 through the wiring device 500, so that the quick installation and connection of the circuit between the two modules to be connected are realized. Therefore, the wiring device 500 of the present invention can realize the electrical connection between the first and second core terminals X-11 and X-21.
Specifically, as shown in fig. 6 to 8, the wire connecting device 500 includes a first tail pipe 501, a second tail pipe 502, a connecting sleeve 503 connected between the first tail pipe 501 and the second tail pipe 502, and a power connection assembly 504 disposed on the butt end of the first tail pipe 501.
The electrical connection assembly 504 includes an insulated distribution board 504a in the middle, and a first electrical conductor 504b and a second electrical conductor 504c symmetrically secured to either side of the insulated distribution board 504 a. The insulation distributing plate 504a is a ring-shaped structure, the outer edge of which forms a ring-shaped tip and is made of insulation material; the axis of the insulated distribution board 504a is perpendicular to the axis of the first tail pipe 501; the first conductor 504b and the second conductor 504c have conical bodies, and the outer sides thereof are smoothly connected to the outer side of the insulation distribution board 504 a. The first conductor 504b and the second conductor 504c are made of conductive metal, and their outer edges are fixed to the inner side walls of the butt ends of the first tail pipes 501, preferably by integral injection molding.
A first wire X-1 can be inserted from the tail end of the first tail pipe 501, and a pair of first core terminals X-11 at the tail end of the first wire X-1 are branched by the insulation distribution board 504a to form two paths, and the two paths of first core terminals X-11 are respectively in one-to-one corresponding contact with the first conductor 504b and the second conductor 504c under the guidance of two side surfaces of the insulation distribution board 504 a;
the second wire X-2 can be inserted from the tail end of the second tail tube 502, and a pair of second core terminals X-21 at the tail end of the second wire X-2 are branched by the insulation distribution board 504a to form two paths, and the two paths of second core terminals X-21 are respectively in one-to-one corresponding contact with the first conductor 504b and the second conductor 504c under the guidance of two side surfaces of the insulation distribution board 504 a.
Therefore, the electrical connection assembly 504 can make the first wire X-1 and the second wire X-2 respectively contacted with both sides thereof form an electrical connection.
Further, an external thread 501a is arranged on the outer side wall of the butt joint end of the first tail pipe 501; a ring of first limiting rings 502a is arranged on the periphery of the butt joint end of the second tail pipe 502.
One end of the connecting sleeve 503 is provided with a second limit ring 503a matched with the first limit ring 502a, and the inner side wall of the other end is provided with an internal thread 503b matched with the external thread 501 a; the connecting sleeve 503 is hooked on the outer side surface of the first stop collar 502a through the second stop collar 503a, and is rotatably connected to the external thread 501a section of the first tail pipe 501 through the internal thread 503b, so as to achieve the effect of tensioning the two ends.
Further, a corresponding sealing block 505 is arranged in each of the internal channels at the tail ends of the first tail pipe 501 and the second tail pipe 502; the sealing block 505 is made of an elastic deformation material; the seal block 505 is fitted to the inner side walls of the first tail pipe 501 and the second tail pipe 502, and the seal block 505 is provided with a through hole 505a fitted to the outer diameter of the first bobbin tip X-11.
Variable grooves C are distributed at the tail ends of the first tail pipe 501 and the second tail pipe 502 along the circumferential direction; and the tail ends of the first tail pipe 501 and the second tail pipe 502 are both connected with a tightening sleeve 506 covering the periphery of the deformation groove C. The tightening sleeve 506 can be in threaded fit connection with the outer side wall of the tail pipe, so that the tail end of the tail pipe can be conveniently compressed, the caliber of the tail pipe is reduced, the sealing block 505 is inwards extruded, the waterproof effect of the electric wire penetrating through the sealing block 505 can be ensured, the electric wire can be tightly fixed on the respective tail pipe, and the tightening extrusion and anti-falling effects of the connecting sleeve 503 on the electric wires at two ends are facilitated.
Therefore, the wiring device 500 of the present invention can realize the fast connection of two electric wires, and can ensure the firmness and stability after the connection between the two electric wires, so that the fast connection between the line monitoring unit 100, the reactive power compensation device 200 and the driving unit 300 can be correspondingly ensured, and further optimization of the modular design of each device in the system is realized; meanwhile, the wiring device 500 can realize quick connection of two wires, and the quick assembly and disassembly can be realized, so that the maintenance and the replacement are convenient.
Claims (10)
1. The utility model provides a be applied to reactive power compensator's electric wire netting monitored control system which characterized in that: it includes:
the line monitoring unit (100) comprises a control module (101), and a voltage measurement conversion circuit (102), a current measurement conversion circuit (103) and a power factor monitoring circuit (104) which are connected to the control module (101); the voltage measurement conversion circuit (102) and the current measurement conversion circuit (103) transmit the collected power grid data to the control module (101);
a reactive power compensation device (200) comprising an air switch (201), a fuse (202), a combination switch (203) and a capacitor (204); the line monitoring unit (100) controls the switching of the capacitor (204) through the compound switch (203), the air switch (201) controls the power supply and the over-current protection of the whole reactive power compensation device (200), and the fuse (202) is matched with the air switch (201);
a drive unit (300) connected between a control module (101) of the line monitoring unit (100) and a compound switch (203) of the reactive power compensation device (200).
2. The power grid monitoring system applied to the reactive power compensation device according to claim 1, wherein: the voltage measurement conversion circuit (102) and the current measurement conversion circuit (103) are connected to a power grid and used for monitoring voltage and current signals in the power grid;
the voltage measurement conversion circuit (102) and the current measurement conversion circuit (103) transmit voltage and current signals to the control module (101) through an analog-to-digital converter (105).
3. A grid monitoring system applied to a reactive power compensation device according to claim 1 or 2, wherein: the driving unit (300) comprises a trigger board (301) and a plurality of pulse driving circuits (302) which are arranged on the trigger board (301) and correspond to the composite switches (203);
the control module (101) is connected with the corresponding compound switches (203) one by one through the pulse driving circuits (302).
4. The power grid monitoring system applied to the reactive power compensation device according to claim 3, wherein: the compound switch (203) is formed by connecting a diode and a thyristor in anti-parallel.
5. The grid monitoring system applied to the reactive power compensation device according to any one of claims 1, 2 and 4, wherein: the capacitor (204) is a three-phase self-healing parallel capacitor.
6. The grid monitoring system applied to the reactive power compensation device according to claim 5, wherein: the line monitoring unit (100) further comprises a display module (106);
the display module (106) is connected with the control module (101) and can display real-time data of the whole reactive compensation device (200) and voltage and current signals in a power grid under the instruction of the control module (101).
7. The grid monitoring system applied to the reactive power compensation device according to any one of claims 1, 2, 4 and 6, wherein: the line monitoring unit (100) further comprises a wireless transceiver module (107) and a server (108) in wireless connection with the wireless transceiver module;
the wireless transceiver module (107) is connected with the control module (101), and the wireless transceiver module (107) can be in wireless connection with the intelligent terminal (400) through the server (108); the control module (101) can send the acquired data information to the server (108) for storage through the wireless transceiving module (107) in real time, and can access or download through the intelligent terminal (400); the intelligent terminal (400) can also send an instruction signal to the server (108), and the server (108) sends the instruction signal to the control module (101), and the control module (101) can control the operation of other modules except the control module (101) in the line monitoring unit (100) according to the instruction signal.
8. The power grid monitoring system applied to the reactive power compensation device according to claim 7, wherein: the line monitoring unit (100), the reactive power compensation device (200) and the driving unit (300) are integrated into a whole respectively, three independent modular devices are formed respectively, a line connected among the three devices is in a detachable two-section type, and the two-section type comprises a first electric wire (X-1) and a second electric wire (X-2);
the tail end of the first electric wire (X-1) forms a pair of first wire core terminals (X-11); the tail end of the second electric wire (X-2) forms a pair of second wire core terminals (X-21); the second wire (X-2) is connected with the second wire core end (X-21) through a wiring device (500).
9. The power grid monitoring system applied to the reactive power compensation device according to claim 8, wherein: the wiring device (500) comprises a first tail pipe (501), a second tail pipe (502), a connecting sleeve (503) connected between the first tail pipe (501) and the second tail pipe (502), and an electric connection assembly (504) arranged on the butt joint end of the first tail pipe (501);
the power connection assembly (504) comprises an insulation distribution board (504 a) positioned in the middle, and a first conductor (504 b) and a second conductor (504 c) which are symmetrically fixed on two sides of the insulation distribution board (504 a);
the first wire (X-1) can penetrate through the tail end of the first tail pipe (501), a pair of first wire core ends (X-11) at the tail end of the first wire (X-1) are branched by an insulation distribution board (504 a) to form two paths, and the two paths of first wire core ends (X-11) are respectively in one-to-one corresponding contact with the first conductor (504 b) and the second conductor (504 c) under the guidance of two side surfaces of the insulation distribution board (504 a);
the second wire (X-2) can penetrate through the tail end of the second tail pipe (502), a pair of second wire core ends (X-21) at the tail end of the second wire (X-2) are branched by the insulation distribution board (504 a) to form two paths, and the two paths of second wire core ends (X-21) are respectively in one-to-one corresponding contact with the first conductor (504 b) and the second conductor (504 c) under the guidance of two side surfaces of the insulation distribution board (504 a).
10. The grid monitoring system applied to the reactive power compensation device according to claim 9, wherein: an external thread (501 a) is arranged on the outer side wall of the butt joint end of the first tail pipe (501); a ring of first limiting ring (502 a) is arranged on the periphery of the butt joint end of the second tail pipe (502);
one end of the connecting sleeve (503) is provided with a second limiting ring (503 a) matched with the first limiting ring (502 a), and the inner side wall of the other end is provided with an internal thread (503 b) matched with the external thread (501 a); the connecting sleeve (503) is hooked on the outer side surface of the first limit ring (502 a) through a second limit ring (503 a) of the connecting sleeve and is rotationally connected to the external thread (501 a) section of the first tail pipe (501) through the internal thread (503 b) of the connecting sleeve;
a corresponding sealing block (505) is arranged in the internal channel of the tail end of each of the first tail pipe (501) and the second tail pipe (502); the sealing block (505) is matched with the inner side walls of the first tail pipe (501) and the second tail pipe (502), and a through hole (505 a) matched with the outer diameter of the first wire core end (X-11) is formed in the sealing block (505);
deformation grooves (C) are distributed at the tail ends of the first tail pipe (501) and the second tail pipe (502) along the circumferential direction; and the tail ends of the first tail pipe (501) and the second tail pipe (502) are both connected with a tightening sleeve (506) covering the periphery of the deformation groove (C).
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| CN112578212A (en) * | 2020-12-18 | 2021-03-30 | 贵州电网有限责任公司 | Monitoring system of modular reactive power compensation device |
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