CN105591294A - Distributed type power supply grid-connected power distribution cabinet - Google Patents
Distributed type power supply grid-connected power distribution cabinet Download PDFInfo
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- CN105591294A CN105591294A CN201610112829.XA CN201610112829A CN105591294A CN 105591294 A CN105591294 A CN 105591294A CN 201610112829 A CN201610112829 A CN 201610112829A CN 105591294 A CN105591294 A CN 105591294A
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- resistance
- cabinet
- grid
- power source
- power distribution
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Classifications
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- 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
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- 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
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
Abstract
The invention discloses a distributed type power supply grid-connected power distribution cabinet. The power distribution cabinet comprises a cabinet body, a distributed type power supply access to power grid control device which is arranged inside the cabinet body, and a temperature and humidity adjusting device. The distributed type power supply access to power grid control device comprises a grid-connected inverter, a knife switch, a voltmeter, an ammeter, a line inlet side breaker, a surge protection device, an isolated island protection device, an intelligent gateway electric energy meter, and a line outlet side breaker which are successively arranged in a series connection and are accessed between a distributed type power supply and a commercial power grid; the temperature and humidity adjusting device comprises a temperature detection device, a humidity detection device, a controller, a cooling and dehumidification device and a power supply module. The temperature detection device and the humidity detection device are arranged inside the cabinet body and are connected with the controller. The controller is connected with the cooling and dehumidification device arranged on the cabinet body. The power supply module provides working power supply. By means of the power distribution cabinet, the safety problem of traditional distributed type power supply being incorporated in commercial power grid is solved, and effective cooling and dehumidification can be performed to power distribution cabinet interior so that the service life of power distribution cabinets can be prolonged.
Description
Technical field
The present invention relates to a kind of power distribution cabinet, specifically the grid-connected power distribution cabinet of a kind of distributed power source, belongs to and joinsPower grid security technical field.
Background technology
Current distributed power source mainly refers to the internal combustion engine of liquid or gaseous fuel (IC), micro-gas-turbineFuel cell (FuelCell), solar power station, wind-powered electricity generation that machine (Microturbines), various engineering are usedThe microgrid of unit composition, operated by rotary motion is at the on-the-spot or close electricity consumption of user scene, to meet specific user's needWant, support the economical operation of existing power distribution network, or meet the requirement of these two aspects simultaneously. Due to closeUser has improved reliability of service and power quality. The development of technology, public environment policy and electricity marketThe acting in conjunction of the factor such as expansion make distributed power generation become the important energy of new century to select.
Distributed power source need to be input to electric energy specific user's load or upper electrical network through inverter, withTime need to have higher security, distributed power source was incorporated to 220 (380) V electrical networks and did not adopt protection dress in the pastPut, seriously jeopardized the problem of personal safety and low voltage electric network security of operation. Therefore, in order to promote pointThe development of cloth formula power supply, needs the grid-connected power distribution cabinet of a kind of new distributed power source to meet above-mentioned requirements.
The grid-connected power distribution cabinet of distributed power source need to be in outdoor, in cabinet highly humid air in the time running into cryogenic object,To form condensation on its surface, condensation has very large destructive power to electrical equipment, easily causes electric elementsBreak down, cause the accidents such as fire.
Summary of the invention
The deficiency existing for overcoming above-mentioned prior art, the object of the present invention is to provide a kind of distributed power sourceGrid-connected power distribution cabinet, it not only can solve distributed power source and be incorporated to utility grid and do not adopt protective device, tightHeavily jeopardize the problem of personal safety and low voltage electric network security of operation, and can effectively enter power distribution cabinet insideRow cool-down dehumidification, the service life of prolongation power distribution cabinet.
The technical solution adopted for the present invention to solve the technical problems is: the grid-connected power distribution cabinet of a kind of distributed power source,Comprise cabinet and be arranged on the distributed power source access power grid control device in cabinet, it is characterized in that: also compriseTemp and humidity regulator, described distributed power source access power grid control device comprise combining inverter, plug-in strip,Voltmeter, ammeter, inlet wire side breaker, surging prevention device, anti-island protect device, intelligent critical point electricityCan show and outgoing line side breaker, described combining inverter, plug-in strip, voltmeter, ammeter, inlet wire side are disconnectedRoad device, surging prevention device, anti-island protect device, intelligent gate energy meter and outgoing line side breaker are gone here and there successivelyAfter connection, access between distributed power source and utility grid; Described temp and humidity regulator comprise temperature-detecting device,Humidity detector, controller, cool-down dehumidification device and power module, described temperature-detecting device and humidityCheckout gear is arranged in cabinet and is connected with controller, and described controller is connected with cool-down dehumidification device, instituteState cool-down dehumidification device and arrange on cabinet, described power module is respectively temperature-detecting device, Humidity Detection dressPut, controller and cool-down dehumidification device provide working power; The top of described cabinet is provided with air outlet, underPortion is provided with air inlet.
Preferably, described temperature-detecting device comprises temperature sensing circuit, and described humidity detector comprises wetDegree testing circuit, described controller comprises intelligent control circuit, described cool-down dehumidification device comprise ventilating fan andAir intake fan, described ventilating fan is arranged on air outlet place in cabinet, and described air intake fan is arranged on air inlet in cabinetPlace; Described power module comprises alternating current 220V power supply, rectification module and Voltage stabilizing module; Described temperature detection electricityRoad and humidity measuring circuit are for detection of humiture information in cabinet and send to intelligent control circuit, described intelligenceThe signal of can control circuit temperature sensing circuit and humidity measuring circuit being sent is controlled after by operation amplifierVentilating fan processed and air intake fan carry out work, and described alternating current 220V power supply is electrical machinery of ventilator and enters fan electromotor and carryFor ac working power supply, alternating current 220V is temperature detection after rectification module and Voltage stabilizing module arrange voltage stabilizingCircuit, humidity measuring circuit and intelligent control circuit provide DC supply.
Preferably, described rectification module comprises resistance R 1, capacitor C 1 and rectifier bridge QZ, described Voltage stabilizing moduleComprise polar capacitor C2 and Zener diode VS1, described intelligent control circuit comprise adjustable resistance RW0, canAdjust resistance R W1, adjustable resistance RW2, adjustable resistance RW3, resistance R 2, resistance R 3, resistance R 4, resistanceR5, capacitor C 3, capacitor C 4, operational amplifier OP1, operational amplifier OP2, triode Q1, triodeQ2, relay J 1 and relay J 2, described temperature sensing circuit comprises negative tempperature coefficient thermistor RT,Described humidity measuring circuit comprises humistor RS;
In incoming transport 220V loop, described whole after described electrical machinery of ventilator M1 and 2 series connection of air intake fan motor MAfter ac input end series resistance R1 of stream bridge QZ and the parallel circuit of capacitor C 1 with alternating current 220V phaseConnect, another ac input end is directly connected with alternating current 220V; The positive pole of described polar capacitor C2 and rectificationThe cathode output end of bridge QZ is connected, and negative pole is connected with the cathode output end of rectifier bridge QZ, described voltage stabilizing two utmost pointsPipe VS1 and polar capacitor C2 are connected in parallel; The electrode input end of described operational amplifier OP1 respectively with subzero temperatureOne end of degree coefficient resistance RT, one end of adjustable resistance RW0 are connected with one end of capacitor C 3, negative poleInput is connected with one end of adjustable resistance RW1 with one end of resistance R 2 respectively, output and triode Q1Base stage be connected; After the coil of the colelctor electrode SRE J1 of described triode Q1 with rectifier bridge QZ justUtmost point output is connected, and emitter stage is connected with one end of resistance R 3; The other end of described adjustable resistance RW0, electricityHold the other end, the other end of adjustable resistance RW1 and the other end of resistance R 3 of C3 respectively with rectifier bridge QZ'sCathode output end is connected, and the other end of the other end of described negative tempperature coefficient thermistor RT and resistance R 2 dividesBe not connected with the cathode output end of rectifier bridge QZ; The electrode input end of described operational amplifier OP2 is respectively with wetOne end of quick resistance R S, one end of adjustable resistance RW2 are connected with one end of capacitor C 4, and negative input dividesBe not connected with one end of adjustable resistance RW3 with one end of resistance R 4, the base stage phase of output and triode Q2Connect; After the coil of the colelctor electrode SRE J2 of described triode Q2 with the cathode output end of rectifier bridge QZBe connected, emitter stage is connected with one end of resistance R 5; The other end of described adjustable resistance RW2, capacitor C 4The other end of the other end of the other end, adjustable resistance RW3 and resistance R 5 is defeated with the negative pole of rectifier bridge QZ respectivelyGo out end be connected, the other end of the other end of described humistor RS and resistance R 4 respectively with rectifier bridge QZ justUtmost point output is connected; The normally opened contact JK1 of described relay J 1 and the normally opened contact JK2 of relay J 2 are alsoAfter connection, be connected in the electric power loop of electrical machinery of ventilator M1 and air intake fan motor M 2.
Preferably, the normally opened contact JK2 parallel connection of the normally opened contact JK1 of described relay J 1 and relay J 2Circuit is also parallel with gauge tap K.
Preferably, described anti-island protect device comprises isolated island detecting device and anti-island protect device; Described orphanIsland checkout gear is used for gathering each circuit breaker position of distributed power source access power grid control device, inspection in real timeSurvey whether dead electricity form isolated island of utility grid, and send message to anti-island protect device; Described anti-isolated islandProtective device gathers voltage and the frequency of distributed power source by receiving the communication message of isolated island detecting device transmissionRate, is meeting the non-sensitive section of time control check chatter lock of low/overfrequency and low/overvoltage.
Preferably, described bottom of cabinet bulk is provided with base, and over top is provided with cabinet cover.
Preferably, the described base setting 0.3-0.6m that is above the ground level.
Preferably, described cabinet cover is provided with the gradient.
Preferably, be provided with inlet air filter screen at the air inlet place of cabinet.
Preferably, be provided with air-out screen pack at the air outlet place of cabinet.
The invention has the beneficial effects as follows: distributed power source access power grid control device of the present invention has voltage electricityStream detection, overcurrent, o-volt protection, residual current protecting, surging prevention, anti-island protect, electric energy meterAmount and the multiple function such as communicating terminal, it has not only solved distributed power source and has been incorporated to utility grid and does not adoptProtective device, the problem that has seriously jeopardized personal safety and low voltage electric network security of operation, and can be effectively rightCool-down dehumidification is carried out in power distribution cabinet inside, has extended the service life of power distribution cabinet.
The present invention, by temp and humidity regulator is set, utilizes temperature-detecting device and humidity detector collectionHumiture information in cabinet, controller carries out power distribution cabinet according to humiture information control cool-down dehumidification deviceCool-down dehumidification, thus guarantee that power distribution cabinet is in comfortable humiture state. Controller of the present invention adopts intelligenceControl circuit, not only simple in structure, intelligent degree is high, and cost is low. The present invention not only can be automaticRegulate the humiture in power distribution cabinet, and can manually control cool-down dehumidification device and carry out manual adjustments humiture,There is simple in structure, easy to operate and cheap feature.
The present invention is by the base setting 0.3-0.6m that is above the ground level, and this setup can effectively have been avoided joiningElectricity cabinet, by the erosion of rainwater, has improved the life-span of power distribution cabinet, has strengthened the security of power distribution cabinet, base topBe provided with power distribution cabinet, power distribution cabinet top is provided with is with acclive cabinet cover, and such structure is convenient to the row of rainwaterPut; Air intake fan is arranged on to air inlet place, cabinet bottom in employing and ventilating fan is arranged on air outlet place, cabinet topAeration structure, utilize the principle of lower air intake, upper air draft, can effectively improve the amount of flow of air, increaseThe time of contact of large and equipment, can reach better cool-down dehumidification effect.
Island effect is a major issue of the grid-connected middle existence of distributed power source, and isolated island phenomenon can be to maintenance peopleMember and consumer even electrical network produce serious consequence, in order island effect quick and precisely to be detected,The present invention has installed anti-island protect device, once detect that isolated island forms, tripping distributed power source fast.Adopt based on low/overfrequency, low/superpotential Comprehensive Preventing island protect principle, there is the anti-island protect of raisingThe feature of the economy of system and the sensitivity of anti-island protect and reliability, has solved traditional passive type anti-Contradiction between island protect sensitivity and reliability.
Brief description of the drawings
Fig. 1 is the structural representation of distributed power source access power grid control device of the present invention;
Fig. 2 is the main TV structure figure of cabinet of the present invention;
Fig. 3 is the backsight structure chart of cabinet of the present invention;
Fig. 4 is the schematic diagram of temp and humidity regulator of the present invention;
Fig. 5 is the circuit diagram of temp and humidity regulator of the present invention;
In figure, 1 casing, 2 bases, 3 cabinet covers, 4 temperature-detecting devices, 5 humidity detectors, 6 air draftsFan, 7 air intake fans.
Detailed description of the invention
Of the present invention open in order to simplify, hereinafter the parts to specific examples and setting are described. ShouldNote, illustrated parts are not necessarily drawn in proportion in the accompanying drawings. The present invention omitted known assemblies andThe description for the treatment of technology and technique is to avoid unnecessarily limiting the present invention.
As shown in Figure 1, Figure 2 and Figure 3, the grid-connected power distribution cabinet of a kind of distributed power source of the present invention, comprises cabinetWith the distributed power source access power grid control device and the temp and humidity regulator that are arranged in cabinet. Described cabinet 1Bottom is provided with base 2, and over top is provided with cabinet cover 3; Described base 2 arranges the 0.3-0.6m that is above the ground level,Can effectively avoid power distribution cabinet by the erosion of rainwater, heighten the life-span of power distribution cabinet, strengthen power distribution cabinetSecurity; Described cabinet cover 3 is provided with the gradient, is convenient to the discharge of rainwater. Described distributed power source access electricityNet control device comprises combining inverter, plug-in strip, voltmeter, ammeter, inlet wire side breaker, Anti-surgingProtector, anti-island protect device, intelligent gate energy meter and outgoing line side breaker, described combining inverter,Plug-in strip, voltmeter, ammeter, inlet wire side breaker, surging prevention device, anti-island protect device, intelligenceGate energy meter and outgoing line side breaker access between distributed power source and utility grid after connecting successively; DescribedTemp and humidity regulator comprises temperature-detecting device 4, humidity detector 5, controller, cool-down dehumidification deviceAnd power module, described temperature-detecting device 4 and humidity detector 5 be arranged in cabinet 1 and with controlDevice connects, and described controller is connected with cool-down dehumidification device, and described cool-down dehumidification device arranges on cabinet, instituteStating power module is respectively temperature-detecting device, humidity detector, controller and cool-down dehumidification device and providesWorking power; The top of described cabinet is provided with air outlet, and bottom is provided with air inlet. In the air-out of cabinetMouth place is provided with air-out screen pack, is provided with inlet air filter screen at the air inlet place of cabinet. Adopt air intake is fannedBe arranged on the aeration structure that air inlet place, cabinet bottom and ventilating fan are arranged on air outlet place, cabinet top, utilizeThe principle of lower air intake, upper air draft, can effectively improve the amount of flow of air, while increasing with the contacting of equipmentBetween, can reach better cool-down dehumidification effect.
As shown in Figure 4 and Figure 5, described temperature-detecting device comprises temperature sensing circuit, described Humidity DetectionDevice comprises humidity measuring circuit, and described controller comprises intelligent control circuit, described cool-down dehumidification device bagDraw together ventilating fan 6 and air intake fan 7, described ventilating fan 6 is arranged on air outlet place in cabinet, and described air intake fan 7 is establishedPut air inlet place in cabinet; Described power module comprises alternating current 220V power supply, rectification module and Voltage stabilizing module;Described temperature sensing circuit and humidity measuring circuit are for detection of humiture information in cabinet and send to intelligence controlCircuit processed, the signal that described intelligent control circuit is sent temperature sensing circuit and humidity measuring circuit is by fortuneVentilating fan after amplifying, is controlled in calculation and air intake fan carries out work, and described alternating current 220V power supply is electrical machinery of ventilatorWith enter fan electromotor ac working power supply be provided, alternating current 220V arranges surely through rectification module and Voltage stabilizing moduleAfter pressure for temperature sensing circuit, humidity measuring circuit and intelligent control circuit provide DC supply.
As shown in Figure 5, described rectification module comprises resistance R 1, capacitor C 1 and rectifier bridge QZ, described voltage stabilizingModule comprises polar capacitor C2 and Zener diode VS1, described intelligent control circuit comprise adjustable resistance RW0,Adjustable resistance RW1, adjustable resistance RW2, adjustable resistance RW3, resistance R 2, resistance R 3, resistance R 4, electricityResistance R5, capacitor C 3, capacitor C 4, operational amplifier OP1, operational amplifier OP2, triode Q1, three utmost pointsPipe Q2, relay J 1 and relay J 2, described temperature sensing circuit comprises negative tempperature coefficient thermistor RT,Described humidity measuring circuit comprises humistor RS; Described electrical machinery of ventilator M1 and air intake fan motor M 2 are connectedIn rear incoming transport 220V loop, ac input end series resistance R1 of described rectifier bridge QZ and electric capacityAfter the parallel circuit of C1, be connected with alternating current 220V, another ac input end is directly connected with alternating current 220V;The positive pole of described polar capacitor C2 is connected with the cathode output end of rectifier bridge QZ, and negative pole and rectifier bridge QZ's is negativeUtmost point output is connected, and described Zener diode VS1 and polar capacitor C2 are connected in parallel; Described operational amplifierThe electrode input end of OP1 respectively with one end of negative tempperature coefficient thermistor RT, one end of adjustable resistance RW0Be connected with one end of capacitor C 3, negative input respectively with one of one end of resistance R 2 and adjustable resistance RW1End is connected, and output is connected with the base stage of triode Q1; The colelctor electrode SRE of described triode Q1After the coil of J1, be connected with the cathode output end of rectifier bridge QZ, emitter stage is connected with one end of resistance R 3; InstituteState the other end of adjustable resistance RW0, the other end of capacitor C 3, the other end and the resistance R 3 of adjustable resistance RW1The other end be connected with the cathode output end of rectifier bridge QZ respectively, described negative tempperature coefficient thermistor RT'sThe other end of the other end and resistance R 2 is connected with the cathode output end of rectifier bridge QZ respectively; Described operation amplifierThe electrode input end of device OP2 respectively with one end of humistor RS, one end and the capacitor C 4 of adjustable resistance RW2One end be connected, negative input is connected with one end of adjustable resistance RW3 with one end of resistance R 4 respectively, defeatedGoing out end is connected with the base stage of triode Q2; After the coil of the colelctor electrode SRE J2 of described triode Q2Be connected with the cathode output end of rectifier bridge QZ, emitter stage is connected with one end of resistance R 5; Described adjustable resistanceThe other end of RW2, the other end of capacitor C 4, the other end of adjustable resistance RW3 and the other end of resistance R 5 divideBe not connected with the cathode output end of rectifier bridge QZ, another of the other end of described humistor RS and resistance R 4End is connected with the cathode output end of rectifier bridge QZ respectively; Normally opened contact JK1 and the relay of described relay J 1After the normally opened contact JK2 parallel connection of device J2, be connected on the electric power loop of electrical machinery of ventilator M1 and air intake fan motor M 2In. Controller of the present invention adopts intelligent control circuit, and not only simple in structure, intelligent degree is high, andCost is low.
The normally opened contact JK2 parallel circuit of the normally opened contact JK1 of described relay J 1 and relay J 2 also alsoBe associated with gauge tap K, carry out cool-down dehumidification work in order to manually to control ventilating fan and air intake fan.
The operation principle of temp and humidity regulator of the present invention is as follows:
In the time that in cabinet, temperature is lower, the resistance value of negative tempperature coefficient thermistor RT is larger, former according to dividing potential dropReason, the B point current potential of operational amplifier OP1 is lower than the current potential of B ', operational amplifier OP1 output low level,Triode Q1 cut-off, relay J 1 no current passes through, the normally opened contact JK1 of the relay J 1 in main circuitDisconnect, now, exhaust fan and air intake fan are not worked; In the time that certain numerical value is arrived in temperature rise in cabinet, subzero temperatureFrom large to small, according to voltage divider principle, the current potential that B is ordered changes from small to big the resistance value of degree coefficient resistance RT,The current potential of ordering as B is during higher than the current potential of B ' some, and operational amplifier OP1 exports high level, and triode Q1 leadsLogical, the normally opened contact JK1 closure of relay J 1, meanwhile, electrical machinery of ventilator M1 and air intake fan motor M 2 are openedBegin to drive exhaust fan and enter fan work hot-air is discharged outside cabinet.
In the time that the humidity of air in cabinet exceedes the allowable upper limit value of humidity in cabinet, the resistance of humistor RSValue reduces, and according to voltage divider principle, the current potential that P is ordered is greater than the current potential that P' is ordered, and operational amplifier OP2 output is highLevel, triode Q2 conducting, the normally opened contact JK2 closure of relay J 2, meanwhile, electrical machinery of ventilator M1Start to drive exhaust fan and enter fan work with air intake fan motor M 2 moisture is discharged outside cabinet.
After the humidity of air in cabinet declines, the resistance value of humistor RS increases gradually, former according to dividing potential dropReason, the current potential that P is ordered is less than the current potential that P' is ordered, operational amplifier OP2 output low level, triode Q2 cut-off,The normally opened contact JK2 of relay J 2 recovers off-state, and electrical machinery of ventilator M1 and air intake fan motor M 2 stopWork, exhaust fan and air intake fan stop dehumidifying work.
The present invention, by temp and humidity regulator is set on power distribution cabinet, utilizes temperature-detecting device and humidity inspectionSurvey device and gather the humiture information in cabinet, controller is according to humiture information control cool-down dehumidification device pairPower distribution cabinet carries out cool-down dehumidification, thereby guarantees that power distribution cabinet is in comfortable humiture state. The present invention can not onlyHumiture in enough power distribution cabinets of adjusting automatically, and can manually control cool-down dehumidification device and carry out manual adjustmentsHumiture, has simple in structure, easy to operate and cheap feature.
Island effect is a major issue of the grid-connected middle existence of distributed power source, and isolated island phenomenon can be to maintenance peopleMember and consumer even electrical network produce serious consequence, in order island effect quick and precisely to be detected,The present invention has installed anti-island protect device, once detect that isolated island forms, tripping distributed power source fast.Anti-island protect device of the present invention comprises isolated island detecting device and anti-island protect device; Described isolated island inspectionSurvey device and be used for gathering each circuit breaker position of distributed power source access power grid control device, detect in real time cityWhether dead electricity form isolated island of electricity electrical network, and send message to anti-island protect device; Described anti-island protectDevice gathers voltage and the frequency of distributed power source by receiving the communication message of isolated island detecting device transmission,Meeting the non-sensitive section of time control check chatter lock of low/overfrequency and low/overvoltage. The present invention adopts based on low/overfrequencyRate, low/superpotential Comprehensive Preventing island protect principle, have improve anti-island protect system economy andThe sensitivity of anti-island protect and the feature of reliability, solved the anti-island protect sensitivity of traditional passive type withContradiction between reliability.
The above is the preferred embodiment of the present invention, comes for those skilled in the artSay, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improve andRetouching is also regarded as protection scope of the present invention.
Claims (10)
1. the grid-connected power distribution cabinet of distributed power source, comprises that cabinet and the distributed power source being arranged in cabinet connectEnter power grid control device, it is characterized in that: also comprise temp and humidity regulator, described distributed power source access electricityNet control device comprises combining inverter, plug-in strip, voltmeter, ammeter, inlet wire side breaker, Anti-surgingProtector, anti-island protect device, intelligent gate energy meter and outgoing line side breaker, described combining inverter,Plug-in strip, voltmeter, ammeter, inlet wire side breaker, surging prevention device, anti-island protect device, intelligenceGate energy meter and outgoing line side breaker access between distributed power source and utility grid after connecting successively; DescribedTemp and humidity regulator comprise temperature-detecting device, humidity detector, controller, cool-down dehumidification device andPower module, described temperature-detecting device and humidity detector are arranged in cabinet and are connected with controller,Described controller is connected with cool-down dehumidification device, and described cool-down dehumidification device arranges on cabinet, described power supply mouldPiece is respectively temperature-detecting device, humidity detector, controller and cool-down dehumidification device working power is provided;The top of described cabinet is provided with air outlet, and bottom is provided with air inlet.
2. the grid-connected power distribution cabinet of a kind of distributed power source according to claim 1, is characterized in that: described temperatureDegree checkout gear comprises temperature sensing circuit, and described humidity detector comprises humidity measuring circuit, described controlDevice processed comprises intelligent control circuit, and described cool-down dehumidification device comprises ventilating fan and air intake fan, described ventilating fanBe arranged on air outlet place in cabinet, described air intake fan is arranged on air inlet place in cabinet; Described power module bagDraw together alternating current 220V power supply, rectification module and Voltage stabilizing module; Described temperature sensing circuit and humidity measuring circuit are usedIn detecting in cabinet humiture information and sending to intelligent control circuit, described intelligent control circuit is examined temperatureThe signal that slowdown monitoring circuit and humidity measuring circuit are sent control after by operation amplifier ventilating fan and air intake fan intoRow work, described alternating current 220V power supply is for electrical machinery of ventilator and enter fan electromotor ac working power supply is provided, and hands overStream 220V is temperature sensing circuit, humidity measuring circuit after rectification module and Voltage stabilizing module arrange voltage stabilizingProvide DC supply with intelligent control circuit.
3. the grid-connected power distribution cabinet of a kind of distributed power source according to claim 2, is characterized in that: described wholeFlow module comprises resistance R 1, capacitor C 1 and rectifier bridge QZ, and described Voltage stabilizing module comprises polar capacitor C2 and steadyPress diode VS1, described intelligent control circuit comprises adjustable resistance RW0, adjustable resistance RW1, adjustable resistanceRW2, adjustable resistance RW3, resistance R 2, resistance R 3, resistance R 4, resistance R 5, capacitor C 3, capacitor C 4,Operational amplifier OP1, operational amplifier OP2, triode Q1, triode Q2, relay J 1 and relayJ2, described temperature sensing circuit comprises negative tempperature coefficient thermistor RT, described humidity measuring circuit comprises wetQuick resistance R S;
In incoming transport 220V loop, described whole after described electrical machinery of ventilator M1 and 2 series connection of air intake fan motor MAfter ac input end series resistance R1 of stream bridge QZ and the parallel circuit of capacitor C 1 with alternating current 220V phaseConnect, another ac input end is directly connected with alternating current 220V; The positive pole of described polar capacitor C2 and rectificationThe cathode output end of bridge QZ is connected, and negative pole is connected with the cathode output end of rectifier bridge QZ, described voltage stabilizing two utmost pointsPipe VS1 and polar capacitor C2 are connected in parallel; The electrode input end of described operational amplifier OP1 respectively with subzero temperatureOne end of degree coefficient resistance RT, one end of adjustable resistance RW0 are connected with one end of capacitor C 3, negative poleInput is connected with one end of adjustable resistance RW1 with one end of resistance R 2 respectively, output and triode Q1Base stage be connected; After the coil of the colelctor electrode SRE J1 of described triode Q1 with rectifier bridge QZ justUtmost point output is connected, and emitter stage is connected with one end of resistance R 3; The other end of described adjustable resistance RW0, electricityHold the other end, the other end of adjustable resistance RW1 and the other end of resistance R 3 of C3 respectively with rectifier bridge QZ'sCathode output end is connected, and the other end of the other end of described negative tempperature coefficient thermistor RT and resistance R 2 dividesBe not connected with the cathode output end of rectifier bridge QZ; The electrode input end of described operational amplifier OP2 is respectively with wetOne end of quick resistance R S, one end of adjustable resistance RW2 are connected with one end of capacitor C 4, and negative input dividesBe not connected with one end of adjustable resistance RW3 with one end of resistance R 4, the base stage phase of output and triode Q2Connect; After the coil of the colelctor electrode SRE J2 of described triode Q2 with the cathode output end of rectifier bridge QZBe connected, emitter stage is connected with one end of resistance R 5; The other end of described adjustable resistance RW2, capacitor C 4The other end of the other end of the other end, adjustable resistance RW3 and resistance R 5 is defeated with the negative pole of rectifier bridge QZ respectivelyGo out end be connected, the other end of the other end of described humistor RS and resistance R 4 respectively with rectifier bridge QZ justUtmost point output is connected; The normally opened contact JK1 of described relay J 1 and the normally opened contact JK2 of relay J 2 are alsoAfter connection, be connected in the electric power loop of electrical machinery of ventilator M1 and air intake fan motor M 2.
4. the grid-connected power distribution cabinet of a kind of distributed power source according to claim 3, is characterized in that: described in continueThe normally opened contact JK2 parallel circuit of the normally opened contact JK1 of electrical equipment J1 and relay J 2 is also parallel with to control and opensClose K.
5. the grid-connected power distribution cabinet of a kind of distributed power source according to claim 1, is characterized in that: described anti-Island protect device comprises isolated island detecting device and anti-island protect device; Described isolated island detecting device is for gatheringEach circuit breaker position in distributed power source access power grid control device, detects whether dead electricity of utility grid in real timeAnd form isolated island, and send message to anti-island protect device; Described anti-island protect device is lonely by receivingThe communication message that island checkout gear sends gathers voltage and the frequency of distributed power source, meet low/overfrequency andThe non-sensitive section of time control check chatter lock of low/overvoltage.
6. according to the grid-connected power distribution cabinet of a kind of distributed power source described in claim 1 to 5 any one, its featureBe: described bottom of cabinet bulk is provided with base, over top is provided with cabinet cover.
7. the grid-connected power distribution cabinet of a kind of distributed power source according to claim 6, is characterized in that: the described endSeat arranges the 0.3-0.6m that is above the ground level.
8. the grid-connected power distribution cabinet of a kind of distributed power source according to claim 6, is characterized in that: described cabinetCover is provided with the gradient.
9. the grid-connected power distribution cabinet of a kind of distributed power source according to claim 6, is characterized in that: at cabinetAir inlet place be provided with inlet air filter screen.
10. the grid-connected power distribution cabinet of a kind of distributed power source according to claim 6, is characterized in that: at cabinetThe air outlet place of body is provided with air-out screen pack.
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| CN201610112829.XA CN105591294A (en) | 2016-02-29 | 2016-02-29 | Distributed type power supply grid-connected power distribution cabinet |
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| CN108736473A (en) * | 2018-06-04 | 2018-11-02 | 浙江博通信息技术有限公司 | A kind of distribution micro battery system |
| CN113394013A (en) * | 2021-05-18 | 2021-09-14 | 周龙珍 | Intelligent voltage transformer |
| WO2022056900A1 (en) * | 2020-09-21 | 2022-03-24 | 华为数字能源技术有限公司 | Inverter, photovoltaic power generation system and dehumidification method |
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