CN114156899A - Low-voltage portable pluggable refined reactive power compensation device and monitoring system - Google Patents

Low-voltage portable pluggable refined reactive power compensation device and monitoring system Download PDF

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Publication number
CN114156899A
CN114156899A CN202111347295.6A CN202111347295A CN114156899A CN 114156899 A CN114156899 A CN 114156899A CN 202111347295 A CN202111347295 A CN 202111347295A CN 114156899 A CN114156899 A CN 114156899A
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China
Prior art keywords
module
compensation
switch
low
voltage
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CN202111347295.6A
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Chinese (zh)
Inventor
石桂强
廖记文
钟豪
李钊泽
梁瑞尤
吴应剑
易嘉栩
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Wuzhou Power Supply Bureau of Guangxi Power Grid Co Ltd
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Wuzhou Power Supply Bureau of Guangxi Power Grid Co Ltd
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Priority to CN202111347295.6A priority Critical patent/CN114156899A/en
Publication of CN114156899A publication Critical patent/CN114156899A/en
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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/24—Circuit arrangements for boards or switchyards
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
    • H02B1/306—Accessories, e.g. windows
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
    • H02B1/32—Mounting of devices therein
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
    • H02B1/32—Mounting of devices therein
    • H02B1/34—Racks
    • H02B1/36—Racks with withdrawable units
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56—Cooling; Ventilation
    • H02B1/565—Cooling; Ventilation for cabinets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H02B11/173—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal drawer type
    • 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
    • H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • 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
    • H02J13/00002—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 monitoring
    • 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
    • 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
    • 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
    • H02J13/00026—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 involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
    • 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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H02J3/144—Demand-response operation of the power transmission or distribution network
    • 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
    • H02J3/1892—Arrangements for adjusting, eliminating or compensating reactive power in networks the arrangements being an integral part of the load, e.g. a motor, or of its control circuit

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

The invention discloses a low-voltage portable pluggable refined reactive compensation device and a monitoring system, which belong to the technical field of reactive compensation devices. In the invention, standard refinement and stepped compensation units are directly inserted into a compensation bin after realizing rapid matching of capacity values, a master control compensation mode is set, and the compensation bin is installed or fixed on the ground by using a matched hardware single rod and put into operation after being connected in parallel. The remote-measuring remote-signaling and capacity monitoring are supported, the anti-theft early warning is realized, and the transportation and the installation are convenient. But cloud monitoring platform and cell-phone APP real time monitoring operation conditions, the device is applicable to 0.4kV voltage class distribution lines, and mainly used is because of the reactive compensation that reactive compensation device ageing, damage, inefficacy lead to is less than or the supply voltage is less than that the power rate that arouses is insufficient.

Description

Low-voltage portable pluggable refined reactive power compensation device and monitoring system
Technical Field
The invention belongs to the technical field of reactive compensation devices, and particularly relates to a low-voltage portable pluggable refined reactive compensation device and a monitoring system.
Background
With the popularization of electric appliances, users at the end of rural power grids commonly have the phenomenon of insufficient reactive compensation, and a local compensation method is often adopted: the reactive power compensation device is installed on site, but the existing reactive power compensation device has the following defects:
the time cost is high: the construction method is subject to troubles of tender purchase and construction arrangement and cannot be installed in time;
the economic cost is large: the problem of insufficient reactive power is difficult to solve once and for all, the load change in rural areas is fast, the required compensation amount cannot be accurately predicted, the purchase cost of the whole device is high, only a small number of users can be compensated, and the economy is poor;
poor flexibility: the installation later time of actual use is less throughout the year, can not wholly demolish when the rate of utilization is low and retrieve.
The capacity of the existing reactive power compensation device is determined by the capacity of the transformer in most cases. However, different load composition conditions of different transformer areas are different, load conditions of the same transformer area in different seasons are different, compensation is performed by adopting a fixed grouping and fixed capacity method, the conditions of insufficient compensation, overcompensation or equipment idling often occur, although most of field requirements can be met by the design of the existing stepped grouping compensation, the power rate of distribution and transformation can be compensated to be above a qualified line, and when the conditions that no small capacity grouping exists in a reactive load valley period, the proportion of a certain single-phase reactive load is greatly increased, the single-phase compensation capacity is insufficient and the like occur, the existing reactive compensation device does not have the capacity of compensating the reactive power shortage in different transformer areas according to different load conditions.
Disclosure of Invention
The invention aims to: in order to solve the existing reactive power compensation device, the capacity of the reactive power compensation device is determined by the capacity of a transformer in most cases. However, the load composition conditions of different transformer areas are different, the load conditions of the same transformer area in different seasons are different, compensation is performed by adopting a fixed grouping and fixed capacity method, the conditions of insufficient compensation, overcompensation or equipment idling often occur, although the design of the existing stepped grouping compensation can meet most field requirements, the power rate of distribution and transformation can be compensated to be above a qualified line, when the conditions that no small-capacity grouping exists in a reactive load valley period, the proportion of a certain single-phase reactive load is greatly increased, the single-phase compensation capacity is insufficient and the like are met, the existing reactive compensation device does not have the problem of capability of realizing how much of the reactive power shortage compensation aiming at different load conditions of different transformer areas, and the low-voltage portable pluggable refined reactive compensation device and the monitoring system are provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
portable plug reactive power compensator and monitored control system that become more meticulous of low pressure, including waterproof box, be provided with a plurality of grafting supports in the waterproof box, a plurality of grafting supports are from last down align to grid and set up, be provided with compensation module on the grafting support, be provided with collection control module in the waterproof box, compensation module includes stainless steel case shell, drawer support, electric energy collection module, control module, electric capacity switching module, surge protection module, theftproof protection module, heating dehumidification module, heat radiation module, drawer type compensation module, power source, switch, on-off switch, electric capacity mount and communication interface.
The compensation module is controlled through an RS485 communication line, 12 groups of capacitors can be controlled at most, full Chinese interface display is realized, and meanwhile, the compensation module has a manual debugging function, the working power supply of the compensation module is AC220V +/-20%, 50Hz +/-5%, the sampling input is voltage of 0-400V, current of 0-5A, the sampling sensitivity is more than or equal to 50mA, the measurement precision is voltage, current of +/-1%, the power factor is 1.5%, the reactive power is +/-2.5%, the compensation speed is less than or equal to 30s, the altitude is less than or equal to 2500 m, and the ambient temperature is-25 ℃ to +60 ℃.
As a further description of the above technical solution: the waterproof box body and the inserting support are used as the most basic frame, a fixed access power grid can be installed in advance, and the acquisition control unit and the compensation unit are designed in a socket mode and can be detached and replaced without power failure. The acquisition control unit acquires power grid operation data of a power distribution station area through the contact pin interface, and controls the mounted compensation unit to switch through the communication interface.
The intelligent composite fling-cut switch adopts an intelligent composite fling-cut switch, the two kinds of switches are respectively a branch compensation switch and a phase compensation switch and correspond to rated voltages of 220V and 380V, the intelligent composite fling-cut switch uses a software synchronous zero-crossing technology of a single chip microcomputer, the problems of electric arc pre-burning and re-burning between contacts of a magnetic latching relay are overcome, the discreteness of action time of each magnetic latching relay is adapted, the magnetic latching relay in the switch perfectly realizes synchronous operation, the intelligent composite fling-cut switch controls the operation state of a switch through a miniature circuit breaker and communicates with a controller through an RJ45 interface, the intelligent composite fling-cut switch has a dial code capacity setting function, the capacity of a hung capacitor can be set through a dial code switch of a terminal, and a communication address of the intelligent composite fling-cut switch is linked with the controller and then actively sends compensation attributes of the intelligent fling-cut switch, Compensation capacity and communication address.
As a further description of the above technical solution:
and a cabinet door state monitoring and alarming device is arranged in the anti-theft protection module, and the cabinet door state monitoring and alarming device is in wireless connection with the mobile terminal.
As a further description of the above technical solution:
the compensation module is transformed based on a standard 0.4kV drawer type low-voltage distribution switch cabinet drawer module, the drawer type switch cabinet is a closed shell made of steel plates, electric elements of an incoming and outgoing line loop are all installed in an extractable drawer to form a functional module capable of completing a certain type of power supply task, the functional module is separated from a bus or a cable by a functional plate made of a grounded metal plate or plastic to form three areas of the bus, the functional module and the cable, isolation measures are also arranged between every two functional modules, main fixing equipment in the drawer comprises a power supply plug connector, a communication plug connector, a circuit breaker, a current transformer, an ammeter, an intelligent composite switch and a common capacitor, the drawer is divided into three states of working, overhauling and disconnecting, and the current state can be known through a state indicator.
As a further description of the above technical solution: the heat capacity of the adapter is improved, and the additional temperature rise of the connector, the cable head and the partition plate caused by the temperature rise of the attached adapter is greatly reduced. The separation between the functional units and the compartments is clear and reliable, and the work of other units is not influenced by the fault of one unit, so that the fault is limited in a minimum range. The bus-bar horizontal arrangement ensures that the device has good dynamic and thermal stability and can bear the impact of 80/176KA short-circuit current.
The heating and dehumidifying module consists of a power supply system, an air supply system, a semiconductor refrigerator, a temperature and humidity detection control loop, a heating loop, a wireless module and a drainage pipeline, and has the functions of automatic operation and manual dehumidification, and the temperature starting value and the dehumidification starting value are adjustable; the dehumidifying air channel actively leads condensation and discharges gas for heating and dehumidifying; sampling by a humidity sensor and a temperature sensor in real time for 24 hours, and automatically condensing when the sampling exceeds a set starting value; the humidity and temperature setting has a memory function, so that the humidity and temperature setting cannot disappear due to shutdown and startup, and the heating and dehumidifying module also has a fault display function, so that fault points can be quickly searched to ensure normal operation; the application of the shielding isolation technology conforms to the 3-level standard of GB/T17626-2008, and the operation under a strong electromagnetic field is ensured; the moisture-pumping condensation-leading pipeline can discharge the condensed water out of the cabinet.
As a further description of the above technical solution: the module adopts the semiconductor refrigeration dehumidification mode, initiatively inhales the humid air in airtight space in the dehumidification wind channel under the effect of fan, and the steam in the air condenses into water behind the semiconductor refrigeration mechanism, and rethread aqueduct discharges the cabinet body, can reach fine dehumidification effect. Through reducing the water content in the air, make relative humidity and absolute humidity descend simultaneously, do not improve the temperature almost, do not produce the negative effects that the difference in temperature brought, fundamentally stops or has reduced the emergence of accident, also can not be because of the high temperature with higher speed the ageing of device and cabinet body in the cabinet. The intelligent dehumidifying device changes a passive condensation prevention mode into an active condensation guide mode, effectively prevents potential safety hazards such as equipment aging, insulation strength reduction, secondary terminal breakdown, material mildew and corrosion of steel structural parts in the cabinet, and guarantees safe operation of a power grid.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. in the invention, standard refinement and stepped compensation units are directly inserted into a compensation bin after realizing rapid matching of capacity values, a master control compensation mode is set, and the compensation bin is installed or fixed on the ground by using a matched hardware single rod and put into operation after being connected in parallel. The remote-measuring remote-signaling and capacity monitoring are supported, the anti-theft early warning is realized, and the transportation and the installation are convenient. But cloud monitoring platform and cell-phone APP real time monitoring operation conditions, the device is applicable to 0.4kV voltage class distribution lines, and mainly used is because of the reactive compensation that reactive compensation device ageing, damage, inefficacy lead to is less than or the supply voltage is less than that the power rate that arouses is insufficient.
2. In the invention, the waterproof box body and the plug-in bracket are used as the most basic frames and can be installed and fixedly connected with a power grid in advance, and the acquisition control unit and the compensation unit can be detached and replaced without power failure through the socket type design. The collection control unit obtains the power grid operation data of the power distribution station area through the pin interface, the compensation unit of the communication interface control mounting is switched, the reactive compensation device can be modularly customized through the customized reactive compensation unit, and random maintenance, upgrading as required and transformation as required can be realized.
3. In the invention, the designed reactive power compensation device is assembled in a mode of mold speeding. The acquisition and control unit in the reactive compensation equipment box body can be changed in a modularized mode, and the capacitor unit can also be changed in a modularized and rapid mode. The compensation unit is manufactured into a drawer type module which can be disassembled and replaced in an electrified way, the box body and the acquisition control unit are installed firstly during installation, the load condition is monitored through the acquisition control unit or the metering automation system, the configuration of the compensation module to be used is selected according to the reactive vacancy of the compensation module, and the compensation unit can be replaced quickly through the drawer support on the box and the electrified insertion design. The design can be adjusted according to the actual load condition of the transformer area: a low-load area can select a compensation unit with small capacity, so that the compensation is more precise and the loss is less; and a high-load platform area or a platform area with large reactive loss can select a large-capacity compensation unit. How many adorns are lacking in the completion, can guarantee the compensation effect, can reduce equipment again and be idle, can also realize reforming transform fast when the load changes, reduced the input cost again when reducing the loss.
4. In the invention, a modularized compensation unit is designed, a uniform drawer type support is used, the internal reserved space can fix the existing small-sized capacitor on the market, and the type and the capacity of the capacitor hung in the drawer are set through the dial of the fling-cut switch. The switching switch is communicated with the acquisition control unit through a wired socket, after the module is electrified, the acquisition control unit reads the capacitance type and the capacity of the group of compensation units, updates the controllable equipment list, automatically updates the switching strategy according to the grouping condition, searches a distribution public distribution area with the recent power rate not reaching 0.99 through the metering automation system, analyzes the reactive load condition of the public distribution area in the recent period, synthesizes the current reactive grouping condition of the distribution area, adjusts the grouping weight, and strengthens single-phase compensation if obvious single-phase reactive load is unbalanced; if the reactive load is light and the amplitude changes are small, the small-capacity packet is refined. Under the condition of not increasing the cost, the customization of reactive compensation equipment in a public transformer area is realized, the idle equipment is reduced, the equipment utilization rate is higher, and the return rate of investment income is improved.
5. In the invention, through the modularized design, complex operation is not needed, so that special technical personnel are not needed for equipment replacement and upgrading maintenance work, and only the existing maintenance personnel need to be trained for simple use. If the acquisition control unit fails, the original acquisition control unit is detached, a new acquisition control unit is replaced, and parameters such as transformation ratio and the like are simply configured; when the compensation unit is upgraded or maintained, the capacitor in the drawer type support is installed or replaced according to the use manual, the dial is adjusted according to the actual wiring condition, the compensation unit can be installed on the fixed support like closing the drawer, then the switch is closed, and the rest configuration modification work is automatically completed by the acquisition control unit. The capacitor of the compensation unit can be maintained conveniently no matter the grouping capacity is changed or the capacitor is damaged, the effective service cycle of the equipment is prolonged, and the investment income ratio is better
Drawings
Fig. 1 is a schematic structural diagram of a low-voltage portable pluggable fine reactive power compensation device and a monitoring system according to the present invention;
fig. 2 is a schematic structural diagram of a plan view of a compensation module in the low-voltage portable pluggable refined reactive power compensation device and the monitoring system provided by the invention;
illustration of the drawings:
1. a waterproof box body; 2. an acquisition control module; 3. a compensation module; 31. a stainless steel box shell; 32. a drawer support; 33. a heating dehumidification module; 34. switching a switch; 35. an anti-theft protection module; 4. and (4) inserting a bracket.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides the following technical solutions: a low-voltage portable pluggable refined reactive compensation device and a monitoring system comprise a waterproof box body 1, wherein a plurality of plugging supports 4 are arranged in the waterproof box body 1, the plugging supports 4 are uniformly arranged from top to bottom, a compensation module 3 is arranged on each plugging support 4, a collection control module 2 is arranged in the waterproof box body 1, each compensation module 3 comprises a stainless steel box shell 31, a drawer support 32, an electric energy collection module, a monitoring control module, a capacitor switching module, a surge protection module, an anti-theft protection module 35, a heating dehumidification module 33, a heat dissipation module, a drawer type compensation module 3, a power interface, a power switch, a switching switch 34, a capacitor fixing frame and a communication interface, the compensation module 3 is controlled through RS communication 485 communication lines, 12 groups of capacitors can be controlled at most, full Chinese interface display is realized, a manual debugging function is realized simultaneously, the working power supply of the compensation module 3 is AC220V +/-20%, 50Hz +/-5 percent, the sampling input is voltage of 0-400V, the current is 0-5A, the sampling sensitivity is more than or equal to 50mA, the measurement precision is voltage, current is +/-1 percent, the power factor is 1.5 percent, the reactive power is +/-2.5 percent, the compensation speed is less than or equal to 30s, the altitude is less than or equal to 2500 m, and the ambient temperature is-25 ℃ to +60 ℃;
the specific implementation mode is as follows: the compensation module 3 takes a 32-bit high-performance chip as a core and adopts a high-performance metering chip dual-core multi-task operating system technology. The technical parameters can be freely configured, and the application range is wide. The method can be widely applied to control of the low-voltage reactive compensation capacitor. The anti-electromagnetic interference ability is strong, and the protect function is complete, can measure and show electric wire netting line voltage, electric current, active power, reactive power and power factor, detects the protection to the capacitor bank in real time simultaneously. By adopting a large-screen green-bottom liquid crystal and a pure Chinese operation interface, the compensation module 3 can control at most 12 groups of capacitors to compensate, and automatically identify the common-division compensation property and the capacitance value set by the intelligent capacitor, thereby achieving the purposes of improving the power factor, reducing the line loss and improving the voltage quality.
The intelligent composite fling-cut switch 34 adopts an intelligent composite fling-cut switch 34, the two kinds of switches are respectively a branch compensation switch and a phase compensation switch, the corresponding rated voltages are 220V and 380V, the intelligent composite fling-cut switch 34 adopts a software synchronous zero-crossing technology of a single chip microcomputer, the electric arc pre-burning and re-burning difficulty between contacts of a magnetic latching relay is overcome, the discreteness of the action time of each magnetic latching relay is adapted, the magnetic latching relay in the switch can perfectly realize synchronous operation, the intelligent composite fling-cut switch 34 controls the operation state of a switch through a miniature circuit breaker and realizes communication with a controller through an RJ45 interface, the intelligent composite fling-cut switch 34 has a dial setting capacity function, the capacity of a hung capacitor can be set through a dial switch of a terminal, a communication address is arranged on the intelligent composite fling-cut switch 34, and the compensation attribute of the intelligent fling-cut switch is actively sent up after the intelligent fling-cut switch is linked with the controller, Compensation capacity and communication address;
the specific implementation mode is as follows: compared with the existing common compound switch, the switch cabinet omits a thyristor component connected with a magnetic latching relay contact in parallel, so that the structure is simplified, the cost is reduced, and the fault which is easy to occur to the thyristor component is avoided, so that the reliability is greatly improved, and the drawer type switch cabinet has higher reliability, safety and interchangeability, is an advanced switch cabinet, and most of the switch cabinets produced at present are drawer type switch cabinets.
A cabinet door state monitoring and alarming device is arranged in the anti-theft protection module 35, and the cabinet door state monitoring and alarming device is in wireless connection with the mobile terminal;
the specific implementation mode is as follows: set up APP in the mobile terminal, in case appear the cabinet door and open, then send out through APP and report an emergency and ask for help or not to look over, and the platform district responsible person or maintainer can in time go to looking over, this function of synchronous fit, device controller and the built-in miniature lithium cell of communication device, when the input side loss of voltage, guarantee to send the warning to the platform immediately, in time report an emergency and ask for help discovering that the cabinet body is stolen or the branch loses electricity through APP.
The compensation module 3 is transformed based on a drawer module of a standard 0.4kV drawer type low-voltage distribution switch cabinet, the drawer type switch cabinet adopts a closed shell made of a steel plate, electric elements of an incoming and outgoing line loop are all installed in an extractable drawer to form a functional module capable of completing a certain type of power supply task, the functional module is separated from a bus or a cable by a functional plate made of a grounded metal plate or plastics to form three areas of the bus, the functional module and the cable, an isolation measure is also arranged between each functional module, main fixed equipment in the drawer comprises a power supply plug connector, a communication plug connector, a circuit breaker, a current transformer, an ammeter, an intelligent composite switch and a common capacitor, the drawer is divided into three states of working, overhauling and disconnecting, and the current state can be known through a state indicator;
the heating and dehumidifying module 33 consists of a power supply system, an air supply system, a semiconductor refrigerator, a temperature and humidity detection control loop, a heating loop, a wireless module and a drainage pipeline, and the heating and dehumidifying module 33 has the functions of automatic operation and manual dehumidification and is adjustable in temperature starting value and dehumidifying starting value; the dehumidifying air channel actively leads condensation and discharges gas for heating and dehumidifying; sampling by a humidity sensor and a temperature sensor in real time for 24 hours, and automatically condensing when the sampling exceeds a set starting value; the humidity and temperature settings have a memory function and cannot disappear due to shutdown, and the heating and dehumidifying module 33 also has a fault display function, so that fault points can be quickly searched to ensure normal operation; the application of the shielding isolation technology conforms to the 3-level standard of GB/T17626-2008, and the operation under a strong electromagnetic field is ensured; the moisture-pumping condensation-leading pipeline can discharge the condensed water out of the cabinet;
the specific implementation mode is as follows: when humid air is sucked by the fan, the humid air flows through the specially designed air channel, is cooled and condensed by the semiconductor refrigerator, and the condensed water of the refrigerator drips into the water diversion groove under the action of gravity and then flows out of the cabinet through the water diversion pipe. And the humidity of the air in the cabinet is reduced to be below a condensation point after sufficient circulating dehumidification within a set starting value, so that the whole damp-proof condensation-inducing heating process is completed. Meanwhile, the intelligent dehumidifying device signal acquisition sensor is externally arranged, so that the real humidity in the cabinet can be accurately acquired in real time, the dehumidifying device is ensured to be started in advance when the condensation condition of the intelligent dehumidifying device in the cabinet is about to be achieved, when the temperature in the box body is lower than a set starting value, the dehumidifying device starts an internal heater loop (the heater is externally connected, the power can be connected by 50-300W), and when the temperature of the box body is increased to the set starting value plus 5 ℃, the heater loop stops working;
description of the operation:
(1) manual/automatic mode: when the dehumidifying device works in an automatic state, the automatic indicator lamp is turned on, the manual indicator lamp is turned off, after the confirmation/manual button is pressed, the automatic indicator lamp is turned off, the manual indicator lamp is turned on, the dehumidifying device starts the dehumidifying module at the moment, the dehumidifying device automatically turns into an automatic mode after the confirmation/manual button is pressed, when the dehumidifying module exits from the manual working state, the confirmation/manual button is pressed again, the dehumidifying device starts the manual heating module at the moment, and the dehumidifying device automatically turns into the automatic mode after the confirmation/manual button is pressed.
(2) Setting a parameter mode: after the power is switched on, the dehumidifying device automatically enters an automatic mode after passing the self-check, and the current humidity value and temperature value are displayed by double-layer digital codes. Pressing the set/exit key sets a dehumidification start value, a dehumidification off value, a heating start value, and a communication address.
(3) Setting a humidity starting value: when the dehumidifying device works normally, a 'set/exit' key is pressed, the dehumidifying device enters a set state, when an upper row of digital tubes displays P1, a 'confirm/manual' key is pressed, the numbers in the lower row flash, and at the moment, the starting value of the humidity can be modified by pressing an 'up' key or a 'down' key; pressing a 'confirm/manual' key for storage after the modification is finished, and stopping flashing the number; modifying the humidity initiation value setting is complete.
(4) Setting a humidity cutoff value: when the dehumidifying device works normally, a setting/exiting key is pressed, the dehumidifying device enters a setting state, an up key or a down key is pressed until the upper row of digital tubes display P2, a confirm/manual key is pressed, the numbers in the lower row flash, and the starting value of the humidity can be modified by pressing the up key or the down key; pressing a 'confirm/manual' key for storage after the modification is finished, and stopping flashing the number; modifying the humidity off value setting is complete.
(5) Setting a temperature starting value: when the dehumidifying device works normally, a setting/exiting key is pressed, the dehumidifying device enters a setting state, an up key or a down key is pressed until the upper row of digital tubes displays P3, a confirm/manual key is pressed, the numbers in the lower row flash, and the temperature cut-off value can be modified by pressing the up key or the down key; pressing a 'confirm/manual' key for storage after the modification is finished, and stopping flashing the number; modifying the temperature start value setting is complete.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. Portable plug reactive power compensator and monitored control system that become more meticulous of low pressure, including waterproof box, its characterized in that, be provided with a plurality of grafting supports in the waterproof box, a plurality of grafting supports are from last down align to grid and set up, be provided with compensation module on the grafting support, be provided with acquisition control module in the waterproof box, compensation module includes stainless steel case shell, drawer support, electric energy collection module, control module, electric capacity switching module, surge protection module, theftproof protection module, heating dehumidification module, heat dissipation module, drawer type compensation module, power source, switch, on-off switch, electric capacity mount and communication interface.
2. The low-voltage portable pluggable refined reactive power compensation device and monitoring system according to claim 1, wherein the compensation module is controlled through RS485 communication line, can control 12 groups of capacitors at most, has full chinese interface display, and has manual debugging function.
3. The low-voltage portable pluggable refined reactive power compensation device and monitoring system according to claim 2, wherein the working power supply of the compensation module is AC220V ± 20%, 50Hz ± 5%, the sampling input is voltage 0-400V, current 0-5A, the sampling sensitivity is greater than or equal to 50mA, the measurement accuracy is voltage, current ± 1%, power factor 1.5%, reactive power ± 2.5%, the compensation speed is less than or equal to 30s, altitude is less than or equal to 2500 m, and the ambient temperature is-25 ℃ to +60 ℃.
4. The low-voltage portable pluggable refined reactive power compensation device and monitoring system according to claim 1, wherein the switching switch is an intelligent composite switching switch, the switching switch has two types, namely a branch compensation switch and a phase compensation switch, and the two types correspond to rated voltages of 220V and 380V, the intelligent composite switching switch uses a software synchronous zero-crossing technology of a single chip microcomputer, thereby not only overcoming the difficulties of pre-burning and re-burning of electric arcs between contacts of the magnetic latching relay, but also adapting to the discrete action time of each magnetic latching relay, and enabling the magnetic latching relays in the switching switch to perfectly realize synchronous operation.
5. The low-voltage portable pluggable refined reactive power compensation device and monitoring system according to claim 4, wherein the intelligent compound switching switch communicates with the controller through an RJ45 interface according to the operating state of the control switch of the miniature circuit breaker, the intelligent compound switching switch has a dial setting capacity function, the capacity of the capacitor to be hung can be set through the dial switch of the terminal, and the intelligent compound switching switch sets a communication address and actively sends the compensation attribute, the compensation capacity and the communication address of the intelligent switch after being linked with the controller.
6. The low-voltage portable pluggable refined reactive power compensation device and monitoring system according to claim 1, wherein a cabinet door state monitoring and alarming device is arranged in the anti-theft protection module, and the cabinet door state monitoring and alarming device is wirelessly connected with the mobile terminal.
7. The low-voltage portable pluggable refined reactive power compensation device and monitoring system according to claim 1, wherein the compensation module is modified based on a standard 0.4kV drawer-type low-voltage distribution switchgear drawer module, the drawer-type switchgear is a closed shell made of steel plates, electrical components of the incoming and outgoing line circuits are all installed in the extractable drawer to form a functional module capable of completing a certain kind of power supply tasks, the functional module is separated from the bus or cable by a grounded metal plate or a functional plate made of plastics to form three areas of the bus, the functional module and the cable, an isolation measure is provided between each functional module, main fixed equipment in the drawer comprises a power plug, a communication plug, a circuit breaker, a current transformer, a current meter, an intelligent composite switch and a common capacitor, the drawer is divided into three states of working, overhauling and disconnecting, the current state can be known by the state indicator.
8. The low-voltage portable pluggable refined reactive power compensation device and monitoring system according to claim 1, wherein the heating and dehumidifying module is composed of a power supply system, an air supply system, a semiconductor refrigerator, a temperature and humidity detection control loop, a heating loop, a wireless module and a water drainage pipeline.
9. The low voltage portable pluggable fine reactive compensation device and monitoring system of claim 8, wherein the heating and dehumidifying module has functions of automatic operation and manual dehumidifying, and the temperature starting value and dehumidifying starting value are adjustable; the dehumidifying air channel actively leads condensation and discharges gas for heating and dehumidifying; sampling by a humidity sensor and a temperature sensor in real time for 24 hours, and automatically condensing when the sampling exceeds a set starting value; the humidity and temperature settings have a memory function and cannot disappear due to shutdown.
10. The low-voltage portable pluggable refined reactive power compensation device and monitoring system according to claim 9, wherein the heating and dehumidifying module further has a fault display function, so that a fault point can be quickly searched to ensure normal operation; the application of the shielding isolation technology conforms to the 3-level standard of GB/T17626-2008, and the operation under a strong electromagnetic field is ensured; the moisture-pumping condensation-leading pipeline can discharge the condensed water out of the cabinet.
CN202111347295.6A 2021-11-15 2021-11-15 Low-voltage portable pluggable refined reactive power compensation device and monitoring system Pending CN114156899A (en)

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